Tektronix 2215 Instruction Manual Download

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Figure 9-7A. A 1 0 —Main board

Summary of Contents for 2215

Page 1: ...VOID PERSONAL INJURY DO NOT PERFORM ANY SERVICING UNLESS YOU ARE QUALIFIED TO DO SO PLEASE CHECK FOR CHANGE INFORMATION AT THE REAR OF THIS MANUAL 2215 OSCILLOSCOPE SERVICE INSTRUCTION MANUAL Tektronix Inc P O Box 500 Beaverton Oregon 97077 Serial Number 070 3826 00 Product Group 46 First Printing JUL 1981 Revised AUG 1982 ...

Page 2: ...price change privileges are reserved INSTRUMENT SERIAL NUMBERS Each instrument has a serial number on a panel insert tag or stamped on the chassis The first number or letter designates the country of manufacture The last five digits of the serial number are assigned sequentially and are unique to each instrument Those manufactured in the United States have six unique digits The country of manufact...

Page 3: ... O R IZO N TA L 2 5 TR IG G E R 2 6 REAR P A N E L 2 8 OPERATING CONSIDERATIONS 2 9 G R A TIC U LE 2 9 G R O U N D IN G 2 9 SIGNAL CONNECTIONS 2 9 INPUT COUPLING CAPACITOR PRECHARGING 2 9 INSTRUMENT C O O L IN G 2 10 OSCILLOSCOPE DISPLAYS 2 10 IN TRO DU CTIO N 2 10 BASELINE TRAC E 2 10 SIGNAL D IS P LA Y 2 10 MAGNIFIED SWEEP DISPLAY 2 11 DELAYED SWEEP D IS P LA Y 2 11 DELAYED SWEEP M EASUREM ENTS ...

Page 4: ...er 3 9 A B Sweep Separation Circuit 3 9 Channel Switching Logic C ircuit 3 9 Internal Trigger Switching L o g ic 3 10 T R IG G E R 3 13 Internal Trigger A m p lifie r 3 13 Trigger Source Switching C ircuit 3 13 A External Trigger A m p lifie r 3 13 Auto Trigger C ircuit 3 13 Trigger Level Com parator 3 14 Inverting Am plifier and TV Trigger C ircu it 3 14 Schmitt Trigger C ircuit 3 15 Auto Baselin...

Page 5: ... INDEX TO PERFORMANCE CHECK STEPS 4 3 V E R T IC A L 4 4 H O R IZO N TA L 4 6 T R IG G E R IN G 4 9 EXTERNAL Z AXIS AND PROBE ADJUST 4 12 D IS P L A Y V E R T IC A L H O R IZO N TA L T R IG G E R IN G EXTERNAL Z AXIS AND PROBE ADJUST MAINTENANCE STATIC SENSITIVE COMPONENTS PREVENTIVE M A IN T E N A N C E ____ IN TRO DU CTIO N GENERAL C A R E INSPECTION AND CLEANING L U B R IC A T IO N SEMICONDUCTO...

Page 6: ...5 4 5 7 5 13 5 18 5 21 6 1 6 2 6 2 6 2 6 2 6 4 6 4 6 4 6 5 6 5 6 5 6 6 6 6 6 10 6 10 6 10 6 10 6 10 6 10 ...

Page 7: ...Front Panel Circuit Board 6 16 Main Circuit B o a rd 6 17 Current Lim it Circuit Board 6 18 REPACKAGING FOR SHIPMENT 6 19 U S SALES SERVICE OFFICES CHANGE INFORMATION ...

Page 8: ... p lifie r 3 8 Simplified diagram of the DC Restorer circu it 4 1 Test setup for external trigger and jitte r checks 6 1 M ultipin connector o rie n ta tio n 9 1 Color codes for resistors and capacitors 9 2 Semiconductor lead configurations 9 3 Locating components on schematic diagrams and circuit board illustrations 9 4 2215 block diagram 9 5 A12 Attenuator Sweep board 9 6 Circuit view of A12 Att...

Page 9: ... 3 cS 3 5 3 8 3 11 3 16 3 21 3 23 3 27 4 10 6 7 ...

Page 10: ...ents 5 10 5 5 Settings for Bandwidth Checks 5 11 5 6 A and B Timing Accuracy 5 15 5 7 Settings for Timing Accuracy C hecks 5 15 5 8 Switch Combinations for A Triggering Checks 5 19 6 1 Relative Susceptibility to Static Discharge Dam age 6 1 6 2 External Inspection C h e cklist 6 3 6 3 Internal Inspection Checklist 6 3 6 4 Maintenance A id s 6 11 ...

Page 11: ...V ...

Page 12: ...rm ation is to be found For maximum input voltage see Table 1 1 Symbols as Marked on Equipment A ATTENTION Refer to manual Power Source This product is intended to operate from a power source that does not apply more than 250 volts rms between the supply conductors or between either supply conductor and ground A protective ground connection by way o f the grounding conductor in the power cord is e...

Page 13: ...ords and connectors see Figure 2 1 Use the Proper Fuse To avoid fire hazard use oniy a fuse of the correct type voltage rating and current rating as specified in the parts list for your product Do Not Operate in Explosive Atmospheres To avoid explosion do not operate this product in an explosive atmosphere unless it has been specifically cer tified for such operation Do Not Remove Covers or Panels...

Page 14: ... K VII ...

Page 15: ...2215 Service viii The 2215 Oscilloscope 3826 01 ...

Page 16: ...out both standard and optional accessories refer to the Accessories page at the back of this manual Your Tektronix represent ative your local Tektronix Field Office or the Tektronix product catalog can also provide accessories inform ation The following electrical characteristics Table 1 1 are valid for the 2215 when it has been adjusted at an ambient temperature between 20 C and 30 C has had a wa...

Page 17: ...Hz Bandwidth Measured w ith a vertically centered 6 division reference signal from a 50 12 source driving a 50 12 coaxial cable that is terminated in 50 12 both at the input connector and at the P6120 probe input w ith the VO LTS D IV Variable control in its CAL detent 0 C to 40 C 20 mV to 10 V per Division Dc to at least 60 MHz 2 mV to 10 mV per Division Dc to at least 50 MHz 40 C to 50 C 2 mV to...

Page 18: ......

Page 19: ... sync components in NORM only 0 4 division internal or 50 mV p p external AUTO Lowest Usable Frequency 20 Hz a TV FIELD 2 0 divisions of composite video or composite sync 3 B Trigger Sensitivity Internal 0 4 division to 2 MHz increasing to 2 0 divisions at 60 MHz External Input Maximum Input Voltage 400 V dc peak ac or 800 V p p ac at 1 kHz or less 3 Input Resistance 1 M 2 2 a Input Capacitance 30...

Page 20: ...p speeds and exclude anything beyond the 100th magnified division 3 5 0 C to 50 C 4 a 6 a POSITION Control Range Start of sweep to 100th division will position past the center vertical graticule line with X10 Magnifier Variable Control Range Continuously variable between calibrated settings Extends both the A and B sweep speeds by at least a factor of 2 5 Delay Time B DELAY TIME POSITION Control R...

Page 21: ......

Page 22: ...3 With dc coupled inputs PROBE ADJUST Signal at PROBE ADJUST Jack Voltage 0 5 V 20 Repetition Rate 1 kHz 20 a Z AXIS INPUT Sensitivity 5 V causes noticeable modulation Positive going input signal decreases intensity Usable Frequency Range Dc to 5 MHz 3 Maximum Safe Input Voltage 30 V dc peak ac or 30 V p p ac at 1 kHz or less 3 Input Impedance 10 k 2 10 3 1 5 Performance Requirement not checked in...

Page 23: ... 000 ft above 1 500 m 5 000 ft Nonoperating To 15 000 m 50 000 ft Hum idity Operating and Nonoperating 5 cycles 120 hours referenced to MIL T 28800B Class 5 instruments Vibration Operating 15 minutes along each of 3 major axes at a total displacement o f 0 015 inch p p 2 4 g at 55 Hz w ith frequency varied from 10 Hz to 55 Hz to 10 Hz in 1 minute sweeps Hold for 10 minutes at 55 Hz All major reson...

Page 24: ...vviuiuui n uiil rd i lei toct iiiiii i o m With Handle Extended 511 mm 20 1 in 1 7 ...

Page 25: ......

Page 26: ...with a three wire power cord permanently attached At the end of the cord is a three contact plug for connection to the power source and to protective ground The plug s protective ground contact connects through the protective ground conductor to the accessible metal parts of the instrument For electrical shock protection insert this plug only into a power source outlet that has a securely grounded...

Page 27: ...e following procedure 1 Unplug the power cord from the power input source if applicable 2 Press in and slightly rotate the fuse holder cap coun terclockwise to release it 3 Pull out the cap from the fuse holder w ith the fuse attached to the inside of the cap 4 Note fuse values and verify proper size 2 A 250 V fast blow 5 Reinstall the fuse and fuse holder cap 2 1 ...

Page 28: ... f l i N E V O L T A G E R A N G t F U S E 2 5 D V D O N O T R E M O V E C O V E R R E F E R S E R V I C I N G T O q u a l i f i e d C A U T IO N T O A V O I U E L E C T R I C S H O C K T H E P O W E R C O R D P R O T E C T I V E G R O L N O I N G C E I N O U C T O R M U S T B E C O N N E C T E D T C G R O U N D E X T I A X I S I N P U T 0 K Q P O S I T I V E G O I N G I N P U T D E C R E A S E S ...

Page 29: ......

Page 30: ...3j AUTO FOCUS Control Adjusts display for optimum definition Once set the focus of the crt display will Figure 2 3 Power display and probe adjust controls connector and indicator REV NOV 1981 ...

Page 31: ...r location of items 8 through 16 Y SERIAL and Mod Slots The SERIAL slot is im printed w ith the instrument s serial number The Mod slot contains the option number that has been installed in the instrument Y CH 1 OR X and CH 2 OR Y Connectors Provide for application of external signals to the inputs of the vertical deflection system or for an X Y display In the X Y mode the signal connected to the ...

Page 32: ... amplifier is grounded to provide a zero ground reference voltage display does not ground the input signal This switch position allows precharging the input coupling capacitor DC All frequency components of the input signal are coupled to the vertical deflection system T CH 1 VOLTS DIV and CH 2 VOLTS DIV Switches Used to select the vertical deflection factor in a 1 2 5 sequence To obtain a calibra...

Page 33: ...ep This mode is useful for viewing both input signals at sweep speeds from 0 05 jus per division to 0 2 ms per division CHOP The display switches between the Chan nel 1 and Channel 2 input signals during the sweep The switching rate is approximately 250 kHz This mode is useful for viewing both Channel 1 and Channel 2 input signals at sweep speeds from 0 5 ms per division to 0 5 s per division 6 PO...

Page 34: ...2215 60 MHz OSCILLOSCOPE Figure 2 5 Horizontal controls ...

Page 35: ...3 3 9 8 0 6 2 5 ...

Page 36: ...eep with an intensified zone and the B Delayed Sweep The A Sweep speed is deter mined by the setting of the A SEC DIV switch The length of the intensified zone on the A Sweep the B Sweep speed is determined by the setting of the B SEC DIV switch POSITION Control Positions the display hori zontally for the A Sweep and the B Sweep In the X Y mode horizontally positions the X axis A B SWP SEP Control...

Page 37: ...signals Figure 2 6 Trigger controls connector and indicator ...

Page 38: ... the CH 1 OR X input connector is the source of the trigger signal VERT MODE The internal trigger source is determined by the signals selected for display by the VERTICAL MODE switches CH 2 The signal applied to the CH 2 OR Y input connector is the source of the trigger signal 2 A TRIGGER LEVEL Control Selects the amplitude point on the trigger signal at which the sweep is triggered REV SEP 1981 ...

Page 39: ...this mode TV FIELD Permits triggering on television field signals refer to TV Signal Displays at the end of Section 2 B TRIGGER LEVEL Control Selects the amplitude point on the trigger signal at which the sweep is triggered When fully clockwise CW RUN AFTER DLY the B Sweep circuit runs immediately following the delay time selected by the A SEC DIV switch and the B DELAY TIM E POSITION control VAR ...

Page 40: ...Figure 2 7 Rear panel connector 2 8 ...

Page 41: ......

Page 42: ...ignal interconnection and ensures the maximum amount o f signal lead shielding in the probe cable A separate ground lead can also be connected from the unit under test to the oscilloscope GND connector located on the front panel 1ST OR LEFT VERTICAL GRATICULE LINE CENTER VERTICAL GRATICULE LINE 11TH OR RIGHT VERTICAL GRATICULE LINE FALL TIME MEASUREMENT PERCENTAGE MARKERS HORIZONTAL GRATICULE LINE...

Page 43: ...ed to the amplifier input when the input coupling switch is moved from GND to AC The precharging net work also provides a measure of protection to the external circuitry by reducing the current levels that can be drawn from the external circuitry during capacitor charging The following procedure should be used whenever the probe tip is connected to a signal source having a different dc level than ...

Page 44: ...AC GND DC VOLTS DIV VO LTS DIV Variable VERTICAL MODE INVERT POSITION Horizontal A and B SEC DIV A and B SEC DIV Variable HORIZONTAL MODE X10 Magnifier POSITION B DELAY TIME POSITION A B SWP SEP Fully counterclockwise minimum Midrange AC 50m IX CAL detent fully clockwise CH 1 O ff button out Midrange Locked together at 0 5 ms CAL detent fully clockwise A O ff variable knob in Midrange Fully counte...

Page 45: ...ness 4 Adjust the Vertical and Horizontal POSITION controls to center the trace on the screen SIGNAL DISPLAY 1 Obtain a baseline trace 2 Apply a signal to either vertical channel input con nector and set the V ER TIC AL MODE switch to display the channel used To display tw o time related input signals use both vertical channel input connectors and select BOTH VER TIC AL MODE then select either A L...

Page 46: ...EC DIV switch setting as required 3 Pull out the A and B SEC DIV Variable knob X10 to obtain sweep magnification 4 Adjust the Horizontal POSITION control for precise positioning of the magnified display 5 To calculate the magnified sweep speed divide the A SEC DIV switch setting by 10 DELAYED SWEEP DISPLAY 1 Obtain a Signal Display 2 Select A LT HORIZONTAL MODE Adjust the appropriate channel POSIT...

Page 47: ...rest then fine adjust until the rising portion is centered at any convenient vertical graticule line 5 Record the B D ELAY TIME POSITION control dial setting 6 Adjust the B D ELAY TIME POSITION control clockwise until the rising portion o f the second pulse of interest is positioned to the same vertical reference line selected in step 4 7 Record the B D ELAY TIME POSITION control dial setting 8 Us...

Page 48: ...mon divisor exists between the two frequencies TV SIGNAL DISPLAYS Displaying a TV Line rate Signal 1 Perform the steps and set the controls as outlined under Baseline Trace and Signal Display to obtain a basic display of the desired TV signal 2 Set A SEC DIV to 10 gs and A B INT to CH 1 or CH 2 as appropriate for applied signal 3 Set A TRIGGER SLOPE for a positive going signal lever up if the appl...

Page 49: ...o GND or dis connecting the signal from the applied signal input until the other field is displayed To display both fields simultaneous ly apply the input signal to both the CH 1 and CH 2 inputs via two probes two cables or through a dual input coupler To examine either a TV Field rate or Line rate signal in more detail either the XI0 Magnifier or HORIZONTAL MODE functions may be employed as descr...

Page 50: ...block diagram are located in the tabbed Diagrams section at the back of this manual The schematic diagram associated w ith each description is identified in the text and indicated on the tab of the appropriate foldout page by a numbered diamond symbol For best understanding of the circuit being described refer to both the appropriate schematic diagram and the functional block diagram ...

Page 51: ... HI and the FALSE state is referred to as LO The specific voltages which constitute a HI or a LO state vary between specific devices For specific device characteristics refer to the manufacturer s data book Linear Devices The functioning of individual linear integrated circuit devices in this section use waveforms or other techniques such as voltage measurement and simplified diagrams to illustrat...

Page 52: ...cuit under control of the front panel VERTICAL MODE switches The output signal from the Channel Switching Logic circuit is applied to a Diode Gate circuit The Diode Gate circuit switches either channel signal or both signals for ADD to a Delay Line Driver stage that supplies the proper drive and impedance match to the Delay Line The Delay Line produces approx imately 100 ns of delay in the vertica...

Page 53: ...al produced by the A Sweep Logic circuit is applied to the A Miller Sweep circuit This circuit produces a linear sweep output w ith a run up time that is controlled by the A SEC DIV switch The sweep signal is applied to the Horizontal Preamplifier for initial am plification Final amplification of the sweep signal to drive the crt horizontal deflection plates is provided by the Horizontal Output Am...

Page 54: ... 3 3 Figure 3 1 Basic block diagram of the 2215 Oscilloscope ...

Page 55: ...CH 2 OR Y input connectors In the X Y Mode of operation the signal applied to the CH 1 OR X con nector provides horizontal X Axis deflection for the display and the signal applied to the CH 2 OR Y connector provides the vertical Y Axis deflection for the display Input Coupling The signal applied to the CH 1 OR X input connector can be ac coupled dc coupled or internally disconnected from the input...

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Page 57: ...uffer Amplifier and Low Z Attenuator The Buffer Am plifier presents a high impedance low capacitance load to the input signal and delivers an accurate replica of that signal to a low impedance buffer output circuit The Low Z output circuit is composed of a 250 fi voltage divider network R139F through R139J and the Volts Div Var circuit R141 C141 and R143 Switch S105B selects the appropriate output...

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Page 59: ...3 and Q134 are stabilized by emitter resistors R139A and R139E respectively Average voltage changes occurring in the out put of Q133 and Q134 are sensed through R139B and R139D which are connected to the point of lowest impedance the emitters o f Q133 and Q134 Resistor R139C provides a path that completes the feedback loop to the slow path portion of the Buffer Amplifier Volts Div Var Circuit and ...

Page 60: ... is adjusted to balance the dc level of the Channel 1 output w ith the Channel 2 output by setting the bias levels of Q157 and Q167 Channel 1 frequency response is matched to Channel 2 response by adjusting C167 Transistors U170D and U170E form a common emitter amplifier The gain of U170D and U170E is set by R180 connected between the emitters and the high frequency response is compensated by C l8...

Page 61: ...Em itter current is supplied to U170A by U197D In turn U170A then supplies emitter current to U170B and U170C to enable the Channel 1 internal trigger signals to pass to the Internal Trigger Amplifier When Channel 2 is selected as the internal trigger source Q273 and U270A w ill be biased on and Q173 biased off Transistor U197A w ill remain on and current supplied by U197D w ill supply emitter cur...

Page 62: ...igger signals w ill be passed to the Internal Trigger Am plifier See the Internal Trigger Switching Logic discussion for a description of how the internal trigger selection signals are generated CHANNEL SWITCH AND VERTICAL OUTPUT The Channel Switch circuitry shown on Diagram 3 selects the input signal or combination of input signals to be connected to the Vertical Output Am plifier By setting the ...

Page 63: ...1 7 zz A VERTICAL SIG T Z y n D i o o FROM CHANNEL SWITCHING LOGIC CH 1 ENABLE V y CH 2 ENABLE CR288 CH 1 VERTICAL SIG CR188 v CR187 CR287 CR277 A CR177 CH 2 VERTICAL SIG Z VERTICAL SIGNAL TO DELAY LINE DRIVER SIGNAL PATH Z T T Z T T T REVERSE BIASED DIODE ADD ENABLE 3826 25 Figure 3 3 Diode gate biasing for a Channel 1 display ...

Page 64: ... is terminated in the proper impedance by resistors R338 and R348 Resistor R355 sets the gain of Q350 and Q360 Thermal compensation of the stage gain is provided by thermistor RT356 connected in series w ith R356 across R355 The RC networks connected across R355 provide both low and high frequency compensation of the stage The differential output is applied to output transistor pairs Q376 Q377 and...

Page 65: ... Switching Logic Circuit The Channel Switching Logic circuitry composed of U310A and U317A selects either Channel 1 or Channel 2 and various display modes for crt display via front panel switches and the X Y position o f the A SEC DIV switch When the instrument is not in the X Y Mode signal line XY is grounded through contacts on the A SEC DIV switch Diagram 8 This action establishes LO logic leve...

Page 66: ...5 is set to ALT a HI is placed on both the Set and Reset inputs of U317A Flip flop U317A w ill transfer the logic level on the D input pin 2 to the Q output pin 5 on each clock pulse rising edge Pin 1 o f NAND gate U310A is held HI by the Chop Oscillator output and pin 2 follows the A lt Sync signal produced by the H oldoff circuitry in the A Sweep Generator Diagram 5 The output of U310A pin 3 is ...

Page 67: ...HI for a duration of about 0 4 jls see Figure 3 4 to produce the positive Chop Blanking pulse The Chop Blanking pulse is fed to the Z Axis A m plifier and is used to prevent display o f the transistions when switching between vertical channels Internal Trigger Switching Logic Internal trigger selection signals to the Trigger Pickoff Am plifier Diagram 2 are produced in a logic circuit com posed of...

Page 68: ...peration of the Internal Trigger Pickoff Amplifiers is discussed in the Channel 1 and Channel 2 Preamps circuit descriptions Concurrently pins 9 and 10 of U305C are pulled HI through R304 and R300 respectively to place a HI at U305C pin 8 The HI from U305C to the wired AND connection on the CH 2 Trig signal line enables the output of U315B to control the logic level o f the CH 2 Trig signal Contro...

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Page 70: ...ER TIC AL MODE switches establish the vertical signal display and as such must also be used to obtain the internal vertical mode trigger signal When S305 is set to VERT MODE the LO logic level on the XY signal line is removed from both U305B pin 4 and from U305D pins 12 and 13 pulling these inputs HI In either ADD or A LT VER TIC AL MODE U305C pin 9 and U305B pin 5 are also pulled HI whenever a LO...

Page 71: ...he switching logic involved is different from the ADD VER TIC AL MODE display With S315 set to CHOP a LO logic level is applied to U305B pin 5 and to U305C pin 9 from the XY signal line via contacts on S315 S317 and S305 The outputs of both U305C and U305B are LO and are applied to the wired AND connection on the CH 1 Trig and C H 2 T rig signal lines These LO signals override the outputs from U31...

Page 72: ... common base transistors U421E and U421D respectively Transistor U421C and R428 constitute an inverting feedback amplifier that converts U421D collector current to a voltage at the collector of U421C This voltage is added in phase with the voltage drop across R427 produced by the signal current of U421E The resulting sum is a single ended voltage signal that is applied to the base of emitter follo...

Page 73: ...ransistors Q411A and Q41 IB are a matched pair Source follower Q411A provides a high input impedance for the external trigger signal Current source transistor Q411B causes Q411A to operate at zero gate to source bias so the device functions w ith no dc offset between the input and output signals The output signal from the source of Q411A drives the base of emitter follower Q414 The em itter follow...

Page 74: ...ve peak detector operates in the same manner as the positive peak detector with corresponding components performing the identical circuit function on the trigger signal negative peaks When S611 is set to NORM 8 6 V is applied through the switch to R525 and R517 Transistor Q519 is biased into saturation by the positive voltage and both CR503 and CR504 become forward biased This action reverse biase...

Page 75: ...rent from the Comparator transistors Moving the SLOPE switch to the negative slope position grounds the bottom of R464 and reduces the bias level of U460C and U460F The fixed bias level on the bases of U460A and U460D is now higher than the bias on U460C and U460F so that U460A and U460D carry the signal current from the Comparator transitors The collectors of U460A and U460D are cross connected t...

Page 76: ...ponse to a changing bias condition the collector currents vary proportionally The collector current changes from Q474 are filtered by a network composed of C476 C477 R477 and R478 The filte r network rejects TV video inform ation and averages the TV horizontal sync pulses Setting the trigger level threshold at near the center of the horizontal sync pulse swing establishes the untriggered level Whe...

Page 77: ...the Schmitt Trigger circuit w ithin a period of about 100 ms A second output from the circuit illuminates the TRIG D LED on the instrument front panel when the sweep is triggered When adequate triggering signals are being received the output of Q493 is applied to pin 5 of monostable m ulti vibrator U640A The negative going edge of the signal causes pin 6 of U640A to switch HI The HI forward biases...

Page 78: ...FIELD triggering the Sweep Logic circuitry w ill cause the Sweep Generator to free run producing a baseline trace if a trigger signal is not received w ithin the predetermined time period Miller Sweep Generator The Miller Sweep circuit is composed of Q630A Q630B Q631 and associated timing components The circuit operates to hold the charging current to the tim ing capacitor at a constant value When...

Page 79: ...FF U640B PIN 9 U 1 J HOLDOFF T IM IN G V V U640B PIN 14 V HOLDOFF U 603 PINS 1 13 U 1 J U A GATE U 603 PIN 9 _J 1 A DUTY U 620 PIN 8 1 ALT SYNC C R 644 ANO DE V r r r A DISP HI FOR A SWEEP U 620 PIN 10 j LO FOR B SWEEP 3 8 2 6 1 8 Figure 3 5 A Sweep timing diagram ...

Page 80: ...ack supplied to the base of Q640 through R639 speeds up the change of state of Q640 By reinforcing the switching action of Q640 in this manner noise occurring at the threshold level of Q640 is overridden The sweep holdoff period commences when the LO from Q640 is applied to pin 11 of monostable m ultivibrator U640B The Q output on pin 9 goes LO and remains LO for a length of time determined by the...

Page 81: ... removed If the Set input to U603A is HI when the reset is removed the Q output w ill be LO However if the Set input is LO the Q output on U603A w ill be HI prior to the reset removal and it w ill remain HI after the reset is removed If the Set input o f U603A was HI when the reset was removed the triggering signal w ill make a negative transistion to set U603A before U603B is clocked since U603B ...

Page 82: ... automatic sweep to be generated after about 100 ms if no trigger signals are received Generation of the Auto Baseline signal was discussed previously in this section The A uto Baseline signal is LO either when trigger signals are being received or when the circuit is disabled by using NORM triggering The Auto Baseline signal is applied to pin 1 of NAND gate U607A while the H oldoff Gate signal is...

Page 83: ...t affect the circuitry to which the A lt Sync signal is applied The A lt Sync signal is fed to tw o places the Alternate Sweep circuit and the Channel Switching circuit It is used to synchronize the horizontal display w ith channel switching transitions when using A L T VER TIC AL MODE and to alternately switch between the A and B Sweeps when using A LT HORIZONTAL MODE ALTERNATE B SWEEP The Altern...

Page 84: ...tching Transistors U648A and U648B form the Comparator and U648C acts as a current source for the Comparator Wiper voltage from the B DELAY TIME POSITION potentiometer is applied to one input of the Comparator at the base of U648A pin 1 The A Sweep sawtooth voltage is applied to the other Comparator input through a voltage divider composed o f R653 R654 and R655 The divider establishes the portion...

Page 85: ... output o f the A lt Sync signal and the B End of Sweep Comparator circuitry at U665A pin 1 As long as the input to U665D pin 13 is HI a B Sweep w ill not be generated When U665D pin 13 goes LO the output at pin 11 w ill go HI If A lt Sync applied to U693A pin 2 is also HI U665A pin 3 w ill go LO and initiate a B Sweep through U665C and U665B The sweep w ill run until either A lt Sync goes LO or t...

Page 86: ...ve going transistions of the A lt Sync signal w ill cause the output o f U670D to go HI which transfers through U693C clocking U696B With each A lt Sync pulse the outputs of U696B w ill toggle to alternately enable the A and B Sweeps to reach the Horizontal Amp lifier For the CH 2 position of the VERTICAL MODE switch circuit operation is the same except that U690E pin 11 is LO Whenever the B Sweep...

Page 87: ...ough R671 Intens Level from the Auto Intensity circuit Diagram 6 w ill be switched o ff of the Z Drive line by reverse biased diode CR671 Z Drive current w ill be supplied by the A Z Axis Logic circuit during this time When the output of the B Sweep Logic circuit is currently enabling a B Sweep then the output o f U670C w ill be LO and CR672 w ill be forward biased This w ill enable current from R...

Page 88: ...he trace on the crt at a constant level with changing sweep speeds and trigger signal repetition rates In conventional oscilloscopes as the duty cycle of the displayed trace changes the intensity w ill vary The Auto Intensity circuit compensates for this effect by increasing the Z Axis Drive voltage for low A Sweep duty factors The elements of the A uto Intensity circuit consist of four blocks the...

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Page 90: ...utput voltage of the circuit changes in response to the input current in a manner that complements the nonlinear triode characteristics of the crt This output voltage is applied both to the Intens Level signal line and to the Z Axis Am plifier via the A and B Z Axis Logic Switching circuits The Intens Level signal is also applied to the Focus circuit Diagram 9 for use in focus tracking of the inte...

Page 91: ... about three by R801 R802 and R803 in series w ith the external input signal Diodes CR801 and CR802 provide protection for the Z Axis Am plifier in case of an accidental application of excessive signal amplitude to the Z AXIS INPUT connector When CHOP VER TIC AL MODE is selected the Chop Blank signal is applied to the collector of Q841 during the display switching time Signal current is shunted aw...

Page 92: ...Z A X IS AMPL Figure 3 7 Detailed block diagram of the Horizontal Amplifier ...

Page 93: ...TO CRT HORIZONTAL f DEFLECTION PLATES 3826 22 3 23 ...

Page 94: ... 2 are first displayed then both alternate B traces are displayed Horizontal Preamplifier The sum of the sweep and positioning current is applied to the input o f one side of a differential amplifier composed of Q730 and Q731 For all conditions other than the X Y Mode X Y Switch transistor Q720 is biased on to provide a ground reference at the other input of the d if ferential amplifier at the bas...

Page 95: ...he Horizontal Preamplifier Horizontal positioning current on the base o f Q730 is added to the X Axis signal by the action of the differential amplifier Then the sum of these two currents is amplified by Q736 and applied to the input of the Horizontal Output Amplifier Horizontal Output Amplifier The Horizontal Output A m plifier converts the single ended output of the Preamplifier into the differe...

Page 96: ...components The emitter voltage is maintained at a level that provides proper biasing for Q763 and Q753 Diodes CR770 and CR780 set up an emitter bias difference between Q780 and Q770 causing the base voltage of both transistors to be equal POWER SUPPLY The Power Supply circuits provide all the low and high voltages required for operation of the instrument The circuitry shown in Diagram 9 converts t...

Page 97: ...38 flows through R939 The voltage drop developed across R939 causes current to flow through VR933 and R933 which holds Q933 on for most of the remainder of the ac power source input cycle Resistor R939 limits the rate of collapse of the field around L925 to prevent damage to Q938 Thermistor RT935 adjusts the bias of Q933 over varying ambient temperature PREREGULATOR CONTROL The ac source voltage i...

Page 98: ... ill vary w ith changes in the ac source voltage This feed forward together with the feedback from the Inverter through optical isolator U931 ensures a constant Pre regulator output to the Inverter Inverter The Inverter circuit changes the dc voltage from the Preregulator to ac for use by the supplies that are con nected to the secondaries o f T940 The output of the Preregulator circuit is applied...

Page 99: ...d Q942 Base current provided by base drive transformer T942 w ill charge C957 negative w ith respect to the Inverter circuit floating ground common level Voltage from CR940 and CR942 also provides a measurement of the minimum collector voltage of Q940 and Q942 with respect to the Inverter circuit floating ground This voltage is fed back to the Preregulator through optical isolator U931 to control ...

Page 100: ...tracking following discussion 3 27 Figure 3 8 Simplified diagram of the DC Restorer circuit ...

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Page 102: ...utput voltage and the cathode voltage Capacitor C865 charges from the crt cathode through R867 CR867 CR868 and R865 to the Z Axis output Capacitor C864 charges through R867 CR867 R864 and CR863 to the Z Axis output When the ac drive voltage starts its positive transition from the lower clamped level toward the higher clamped level the charge on C864 increases due to the rising voltage 3 28 ...

Page 103: ...hrough C865 The fast transitions start the crt writing beam current toward the new intensity level The DC Restorer output level then follows the Z Axis output voltage level to set the new bias voltage for the crt control grid Neon lamps DS867 and DS868 protect the crt from excessive grid to cathode voltage if the potential on either the control grid or the cathode is lost for any reason ...

Page 104: ...exceed the listed specifications Detailed operating instructions for test equipment are not given in this procedure If more operating inform ation is required refer to the appropriate test equipment instruction manual When equipment other than that recommended is used control settings of the test setup may need to be altered If the exact item of equipment given as an example in Table 4 1 is not av...

Page 105: ...re and the Adjustm ent Procedure sections there is an equipment required list showing only the test equipment necessary for performing the steps in that subsection In this list the item number that follows each piece of equipment corresponds to the item number listed in Table 4 1 This procedure is structured in subsections which can be performed independently to permit checking individual portions...

Page 106: ...pedance 50 12 Connectors bnc Signal termination Tektronix Part Number 011 0049 01 6 Dual Input Coupler Connectors bnc female to dual bnc male Vertical checks and adjustments Tektronix Part Number 067 0525 01 7 10X Attenuator Ratio 10X Impedance 5012 Connectors bnc Vertical compensation and triggering checks Tektronix Part Number 011 0059 02 8 T Connector Connectors bnc Signal interconnection Tektr...

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Page 108: ...NDEX TO PERFORMANCE CHECK STEPS Vertical Page 1 Check Deflection Accuracy and Variable Range 4 4 2 Check B andw idth 4 5 3 Check Common Mode Rejection R a tio 4 5 Horizontal 1 Check Timing A ccuracy 4 6 2 Check Delay Time Position R ange 4 7 3 Check SEC DIV Variable Range 4 7 REV SEP 1981 ...

Page 109: ... 5 Check Delay Jitte r 4 8 6 Check POSITION ControlRange 4 8 7 Check X G ain 4 8 8 Check X Bandwidth 4 8 Triggering 1 Check Internal Triggering 4 9 2 Check External Triggering 4 10 External Z Axis and Probe Adjust 1 Check EXT Z AXIS Operation 4 12 2 Check PROBE ADJUST O peration 4 12 4 3 ...

Page 110: ...ORIZONTAL MODE A AND B SEC DIV A AND B SEC DIV Midrange A 0 5 ms Variable X10 Magnifier CAL detent O ff knob in Trigger VAR HOLDOFF ATR IG G ER MODE A TRIGGER SLOPE ATR IG G ER LEVEL A B INT A SOURCE NORM AUTO T Midrange VERT MODE INT PROCEDURE STEPS 1 Check Deflection Accuracy and Variable Range a Connect a 10 mV standard amplitude signal to the CH 1 OR X input connector using a 50 12 cable 4 4 ...

Page 111: ...Standard Amplitude Signal Vertical Deflection Divisions 3 Accuracy Limits Divisions 2 mV 10 mV 5 4 85 to 5 15 5 mV 20 mV 4 3 88 to 4 12 10 mV 50 mV 5 4 85 to 5 15 20 mV 0 1 V 5 4 85 to 5 15 50 mV 0 2 V 4 3 88 to 4 12 0 1 V 0 5 V 5 4 85 to 5 15 0 2 V 1 V 5 4 85 to 5 15 0 5 V 2 V 4 3 88 to 4 12 1 V 5 V 5 4 85 to 5 15 2 V 10 V 5 4 85 to 5 15 5 V 20 V 4 3 88 to 4 12 10 V 50 V 5 4 85 to 5 15 ...

Page 112: ...ks VOLTS DIV Generator Switch Settings Output Frequency 2 mV to 10 mV 50 MHz 20 mV to 10 V 60 MHz e CHECK Display amplitude is 3 5 divisions or greater f Repeat parts c through e for all indicated CH 1 VOLTS DIV switch settings up to the output voltage upper lim it of the sine wave generator being used g Move the generator output signal from the CH 1 OR X input connector to the CH 2 OR Y input con...

Page 113: ...rt n If it does not continue w ith part h h Set VERTICAL MODE to CH 1 i Change the generator frequency to 50 kHz and adjust the output to obtain a 6 division display j Set VER TIC AL MODE to BOTH k Adjust the CH 2 VO LTS D IV Variable contol for minimum display amplitude best CMRR I Change the generator frequency to 10 MHz m CHECK Display amplitude is 0 6 division or less 4 5 n Disconnect the test...

Page 114: ...annel 2 AC GND DC CAL detent Normal button out DC GND Horizontal POSITION HORIZONTAL MODE A AND B SEC DIV A AND B SEC DIV Midrange A 0 05 jus Variable X10 Magnifier B DELAY TIME CAL detent O ff knob in POSITION Fully counterclockwise Trigger VAR HOLDOFF A TRIGGER MODE SLOPE both LEVEL both A B INT A SOURCE A EXT COUPLING NORM NORM S Midrange VERT MODE EXT D fr 10 4 6 ...

Page 115: ...al graticule line NOTE When making timing measurements use as a reference the same p oint on each tim e marker d CHECK Timing accuracy is w ithin the lim its shown in Table 4 4 for the applicable position o f the X I 0 Mag nifier When making the check w ith the X I 0 Magnifier On exclude any portion of the sweep past the 100th magnified division Table 4 4 A and B Timing Accuracy X10 Magnifier Accu...

Page 116: ...s 0 5 jus 0 5 jus 50 ns 1 JUS 1 JUS 0 1 jus 2 jus 2 jus 0 2 jus 5 jus 5 jus 0 5 jus 10 jus 10 jus 1 JUS 20 jus 20 jus 2 jus 50 jus 50 jus 5 jus 0 1 ms 0 1 ms 10 jus 0 2 ms 0 2 ms 20 jus 0 5 ms 0 5 ms 50 jus 1 ms 1 ms 0 1 ms 2 ms 2 ms 0 2 ms 5 ms 5 ms 0 5 ms 10 ms 10 ms 1 ms 20 ms 20 ms 2 ms 50 ms 50 ms 5 ms A Sweep Only 0 1 s 0 1 s 10 ms 0 2 s 0 2 s 20 ms 0 5 s 0 5 s 50 ms REV SEP 1981 ...

Page 117: ...ise e CHECK Intensified zone is past the 11th vertical graticule line 3 Check SEC DIV Variable Range a Set CH 1 VO LTS DIV Channel 1 AC GND DC HORIZONTAL MODE A SEC DIV SEC DIV Variable X10 Magnifier 0 5 V DC A 0 2 ms Fully counterclockwise O ff knob in b Select 0 5 ms time markers from the time mark generator c CHECK Time markers are 1 division or less apart d Return the SEC DIV Variable control ...

Page 118: ...C DIV switch to 0 5 jls b Select 10 jus time markers c Slightly readjust the B DELAY TIME POSITION dial to position a time marker w ithin the graticule area d CHECK Jitter on the leading edge of the time marker does not exceed 1 division Disregard slow drift A SEC DIV B SEC DIV 0 5 ms 50 ids 6 Check POSITION Control Range a Set ASEC D IV HORIZONTAL MODE 10 y L tS A 4 8 ...

Page 119: ...5 division 4 75 to 5 25 divisions d Disconnect the test setup 8 Check X Bandwidth a Connect a 50 kHz leveled sine wave signal via a 50 2 cable and a 50 fi termination to the CH 1 OR X input connector b Set the generator to obtain a 5 division horizontal display c Adjust the generator output frequency to 2 MHz d CHECK Display is at least 3 5 divisions in length e Disconnect the test setup ...

Page 120: ...UPLING As desired Best focused display Midrange CH 1 2 mV 20 mV CAL detent Normal button out DC Midrange A 0 2 jus CAL detent O ff knob in NORM NORM S Midrange VERT MODE INT DC 1 Check Internal Triggering a Connect the leveled sine wave generator output via a 50 12 cable and a 50 12 termination to the CH 1 OR X input connector b Set the generator output to produce a 4 division 2 MHz display c Set ...

Page 121: ...e CH 1 OR X input connector Set VER TIC AL MODE to CH 1 VOLTS DIV A SEC DIV VERTICAL MODE 10 mV 10 pS CH 1 LEVELED SINE WAVE GENERATOR CABLE BNC PROBE TIP TO T CONNECTOR BNC ADAPTER 3826 16A 4 10 REV SEP 1981 Figure 4 1 Test setup for external trigger and jitter checks ...

Page 122: ...can be obtained by adjusting the A TRIGGER LEVEL control for each switch com bination given in Table 4 6 h Remove the 10X attenuator from the test setup and set the A EXT COUPLING switch to DC 10 i Repeat part g REV FEB 1982 ...

Page 123: ...o Set the generator to 60 MHz p Repeat parts g and h q Repeat part g r Disconnect the test setup 4 11 ...

Page 124: ...e Channel 1 AC GND DC oesi aennea display Midrange CH 1 2 V CAL detent DC Horizontal POSITION Midrange HORIZONTAL MODE A A S E C D IV 20 ns A AND B SEC DIV Variable CAL detent Trigger VAR HOLDOFF NORM ATR IG G ER MODE AUTO A TRIGGER SLOPE S A TRIGGER LEVEL Midrange A B INT VERT MODE A SOURCE INT 4 12 ...

Page 125: ...he test setup 2 Check PROBE ADJUST Operation a Set CH 1 VO LTS DIV 10mV A S E C D IV 0 5ms b Connect the P6120 Probe to the CH 1 OR X input connector and insert the probe tip into the PROBE ADJUST jack on the instrument fro n t panel If necessary adjust the probe compensation for a flat topped square wave display c CHECK Display is 5 divisions 1 division 4 to 6 divisions d Disconnect the test setu...

Page 126: ...ired refer to the appropriate test equipment instruction manual When equipment other than that recommended is used control settings of the test setup may need to be altered If the exact item of equipment given as an example in Table 4 1 is not available first check the Purpose column to verify use of this item Then use the M inim um Spec ification column to determine if any other available test eq...

Page 127: ...s a list of all the front panel control settings required to prepare the instru ment for performing Step 1 in that subsection Each succeeding step w ithin a subsection should then be per formed both in the sequence presented and in its entirety to ensure that control settings w ill be correct for ensuing steps ADJUSTMENT INTERACTION The use of Table 5 1 is particularly im portant if a partial proc...

Page 128: ... INVERT BALANCE CH 1 CH 2 BALANCE ATTENUATOR COMP VERTICAL OUTPUT COMP CH 1 4 CH 2 HF MATCH HORIZ GAIN HORIZ B GAIN HORIZ X I0 GAIN MAG REGISTRATION DELAY DIAL START ADJ DELAY DIAL GAIN 5us TIMING A AND B HIGH SPEED TIMING X GAIN SLOPE BALANCE AUTO TRIGGER CENTERING CRT REPLACEMENT 5 2 ...

Page 129: ... ...

Page 130: ...ubsection Then connect the test equipment to an appropriate ac power input source and connect the 2215 to a variable autotransformer Item 10 in Table 4 1 that is set for 115 V ac Apply power and allow a 20 minute warm up period before commencing any adjustments The most accurate display adjustments are made w ith a stable well focused low intensity display Unless otherwise noted adjust the AUTO IN...

Page 131: ... im in g 5 14 5 Adjust High Speed Tim ing 5 14 6 Check Timing A ccuracy 5 15 7 Check B DELAY TIME POSITION Control Range 5 16 8 Check SEC DIV Variable Range 5 16 9 Check B DELAY TIM E POSITION Dial Accuracy 5 16 10 Check Delay Jitte r 5 16 11 Check POSITION Control Range 5 16 12 Adjust X Gain 5 17 13 Check X Bandwidth 5 17 Triggering 1 Adjust Trigger Slope Balance 5 18 2 Check Adjust Auto Trigger ...

Page 132: ...O INTENSITY As desired AUTO FOCUS Best focused display Vertical both POSITION Midrange VERTICAL MODE CH 1 VOLTS DIV 0 1 V VOLTS DIV Variable CAL detent AC GND DC GND Horizontal POSITION Midrange HORIZONTAL MODE A A SEC DIV 5 ps A AND B SEC DIV Variable CAL detent X10 Magnifier O ff knob in Trigger VAR HOLDOFF NORM ATR IG G ER MODE TV FIELD A TRIGGER SLOPE J A TRIGGER LEVEL Midrange A B INT VERT MO...

Page 133: ...is isolated from ground because the Inverter power supply circuitry common is at line potential b Connect the digital voltmeter low lead to common TP934 and connect the volts lead to TP952 c CHECK Reading is 4 2 V to 4 4 V If the reading is w ithin these limits skip to part e d ADJUST Head Room Voltage Adjust R952 for 4 3 V e Disconnect the voltmeter leads f Connect the digital voltmeter low lead ...

Page 134: ...tude of the dc supply is w ithin the typical value given in Table 5 2 m Repeat parts k and I for each test point in Table 5 2 n Disconnect the test setup 2 Check High Voltage Supply a Set the POWER switch to OFF button out b Set the dc voltmeter to a range of at least 2500 V dc and connect the volts lead to chassis ground Remove the crt base socket cover and connect the common lead of the dc voltm...

Page 135: ...rol for a visible dot Then back o ff the Grid Bias potentiometer until the dot just disappears e Disconnect the test setup 4 Adjust Astigmatism and Auto Focus Tracking R887 and R875 a Set Channel 1 AC GND DC DC A S E C D IV 20 ms A TRIGGER MODE AUTO b Connect a leveled sine wave generator via a 50 12 cable and a 50 12 termination to the CH 1 OR X input connector c Adjust the generator output fo r ...

Page 136: ...b CHECK That the trace is parallel to the center horizontal graticule line 5 6 ...

Page 137: ...e Disconnect the test setup REV SEP 1981 ...

Page 138: ...ontal POSITION HORIZONTAL MODE A AND B SEC DIV A AND B SEC DIV Variable X10 Magnifier Midrange A 0 5 ms CAL detent O ff knob in 1 Adjust Vertical Gain R186 R286 R145 and R245 a Connect a 100 mV standard amplitude signal via a 50 JT2 cable to the CH 1 OR X input connector b ADJUST Ch 1 Gain R186 for an exact 5 division display c Move the cable from the CH 1 OR X input connector to the CH 2 OR Y inp...

Page 139: ...e trace on the center horizontal graticule line using the Channel 2 POSITION control c Change the CH 2 VOLTS DIV switch to 10 mV d ADJUST Ch 2 X10 Bal R246 to set the trace on the center horizontal graticule line e Repeat parts a through d until there is no trace shif when changing the CH 2 VOLTS DIV switch from 20 mV to 10 mV f Change the VERTICAL MODE switch to CH 1 g Repeat parts a through e fo...

Page 140: ...TICAL MODE switch to CH 2 and move the cable from the CH 1 OR X input connector to the CH 2 OR Y input connector d CHECK Deflection accuracy is w ithin the limits given in Table 5 3 for each CH 2 VO LTS D IV switch set ting and corresponding standard amplitude signal Perform the checks from the bottom to the top of Table 5 3 to avoid unnecessary switch position changes When at the 20 mV VO LTS D I...

Page 141: ...peration a Set V ER TIC AL MODE BOTH ALT AC GND DC both GND ASE C D IV 10 ms b CHECK Display alternates between the CH 1 and CH 2 displays If necessary use both POSITION controls to separate the two traces c Set VERTICAL MODE to CHOP d CHECK CH 1 and CH 2 displays are both displayed simultaneously 7 Check VOLTS DIV Variable Control Trace Shift a Set VER TIC AL MODE VO LTS DIV both AC GND DC both A...

Page 142: ...ton to Normal button out f Repeat parts c through e until there is no trace shift when switching the INVERT button between Invert and Normal 9 Adjust Trigger Balance R154 a Set the A B INT switch to CH 2 b Connect the digital voltmeter low lead to chassis ground TP501 and the volts lead to pin 16 of U421 note the voltage reading for use in part d c Set the A B INT switch to CH 1 d ADJUST Ch 1 Ch 2...

Page 143: ...el adjustment g ADJUST The H O LF Comp capacitor for best fron corner Table 5 4 Attenuator Compensation Adjustments Adjustment Channel 1 Channel 2 MO LF Comp C105 C205 HO Input C Cl 04 C204 H 0 0 LF Comp Cl 11 C211 H 0 0 Input C C110 C210 h Replace the cable and 50 f2 termination w ith the P6120 Probe and probe tip to bnc adapter i Adjust the generator output for a 5 division display 5 10 ...

Page 144: ...ment is noted t Set the VER TIC AL MODE switch to CH 2 u Repeat parts b through s for CH 2 v Disconnect the test setup 11 Adjust Vertical Output Amplifier Compen sation R357 C357 R367 R366 and C366 a Set VO LTS D IV both 20 mV A S E C D IV 0 05 jus b Connect a 1 MHz positive going fast rise square wave via a 50 0 cable a 10X attenuator and a 50 0 term ination to the CH 2 OR Y input connector ...

Page 145: ...a 50 ft cable and a 50 JT2 termination to the CH 2 OR Y input connector c Set the generator output for a 5 division 50 kHz display d Increase the generator frequency until the display reduces to 3 5 divisions e Move the signal from the CH 2 OR Y input connector to the CH 1 OR X input connector Set the VER TIC AL MODE switch to CH 1 f ADJUST CH 1 CH 2 HF Match C167 fo r a vertical display amplitude...

Page 146: ...he VERTICAL MODE switch to CH 2 n Repeat parts i through k for all indicated CH 2 VO LTS DIV switch settings up to the output voltage upper lim it of the sine wave generator being used o Disconnect the test setup 13 Check Common Mode Rejection Ratio a Set both VO LTS D IV switches to 20 mV b Connect a 10 MHz leveled sine wave signal via a 50 2 cable a 50 12 term ination and a dual input coupler to...

Page 147: ... amplitude is 0 6 division or less n Disconnect the test setup 14 Check POSITION Control Range b Connect a 0 5 V standard amplitude signal via a 50 12 cable to the CH 1 OR X input connector c Adjust the CH 1 VO LTS DIV Variable control for 4 4 division display Then set the CH 1 VO LTS DIV switch to 10 mV a Set VERTICAL MODE VOLTS DIV both AC GND DC both CH 1 50 mV AC 5 12 ...

Page 148: ...he generator output for an 8 division input connector d Set the VERTICAL MODE switch to CH 2 e CHECK Display amplitude is 4 divisions or less f Move the input signal from the CH 1 OR X input con nector to the CH 2 OR Y input connector g Set CHI VOLTS DIV 10 mV CH 2 VOLTS DIV 0 5 V VERTICAL MODE CH 1 h CHECK Display amplitude is 4 divisions or less i Disconnect the test setup rev SEP 1981 ...

Page 149: ... POSITION Midrange b ADJUST Horiz Gain R752 for 1 time marker per VER TIC AL MODE CH 1 division CH 1 VO LTS DIV 0 5 V CH 1 VO LTS D IV Variable CAL detent c Set the HORIZONTAL MODE switch to B INVERT Normal button out Channel 1 AC GND DC DC Channel 2 AC GND DC GND d ADJUST B Gain R682 for 1 time marker per division Horizontal POSITION Midrange e Set the HORIZONTAL MODE switch to A HORIZONTAL MODE ...

Page 150: ...r starts at the beginning of the B sweep d Set the B DELAY TIME POSITION control to 9 00 e ADJUST Delay Dial Gain R654 so that the 10th A sweep time marker is intensified and the B sweep time marker starts at the beginning of the B sweep f Set the B DELAY TIME POSITION control to 1 00 and repeat parts c through e until no further improvement is noted 4 Adjust 5 jus Timing C676 and C626 a Set HORIZ...

Page 151: ...t the Horizontal POSITION control so that the 5th time marker is aligned w ith the 2nd vertical graticule line g ADJUST 5 ns Linearity C734 for one time marker every 2 divisions over the center 8 divisions of the mag nified sweep Adjust the Horizontal POSITION control to check the linearity to the 15th time marker h Repeat parts e through g until no further improve ment is rioted i Set the X10 Mag...

Page 152: ... with the 2nd vertical graticule line using the Horizontal POSITION control g CHECK Timing accuracy is w ithin the limits shown in Table 5 6 for the applicable position of the X10 Mag nifier When making the check with the X I 0 Magnifier On exclude any portion of the sweep past the 100th magnified division h Set the HORIZONTAL MODE switch to A i Repeat parts b through h for the A and B SEC DIV and...

Page 153: ...50 ns 1 JU S 1 JU S 0 1 s 2 jus 2 jus 0 2 us 5 jus 5 us 0 5 jus I O jus 10 jus 1 JU S 20 jus 20 jus 2 jus 50 jus 50 jus 5 jus 0 1 ms 0 1 ms 10 jus 0 2 ms 0 2 ms 20 jus 0 5 ms 0 5 ms 50 jus 1 ms 1 ms 0 1 ms 2 ms 2 ms 0 2 ms 5 ms 5 ms 0 5 ms 10 ms 10 ms 1 ms 20 ms 20 ms 2 ms 50 ms 50 ms 5 ms A Sweep Only 0 1 s 0 1 s 10 ms 0 2 s 0 2 s 20 ms 0 5 s 0 5 s 50 ms 5 15 ...

Page 154: ...erclockwise O ff knob in b Select 0 5 ms time markers from the time mark generator c CHECK Time markers are 1 division or less apart d Return the SEC DIV Variable control to the CAL detent 9 Check B DELAY TIME POSITION Dial Accuracy a Set HORIZONTAL MODE B A SEC DIV B SEC DIV B TRIGGER LEVEL 0 2 jus 0 05 m s CW RUN AFTER DLY b Select 0 2 jus time markers 5 16 ...

Page 155: ...to position a time marker w ithin the graticule area d CHECK Jitter on the leading edge of the time marker does not exceed 1 division Disregard slow drift 11 Check POSITION Control Range a Set A SEC DIV 10 jus HORIZONTAL MODE A b Select 50 jus time markers c Align the 3rd time marker w ith the center vertical graticule line d Set the X10 Magnifier knob to On knob out ...

Page 156: ...i u n a input cunrieciur using a u u ii caDie uisconnect m e test seiu e ...

Page 157: ...NVERT AC GND DC Midrange CH 1 20 mV CAL detent Normal button out DC Horizontal POSITION HORIZONTAL MODE A AND B SEC DIV A AND B SEC DIV Variable X10 Magnifier Midrange A 20 is CAL detent O ff knob in Trigger VAR HOLDOFF ATR IG G ER MODE SLOPE both LEVEL both A B INT A SOURCE A EXT COUPLING NORM AUTO V Midrange VERT MODE INT DC 5 18 ...

Page 158: ...djust Auto Trigger Centering R511 and R512 and TRIG D LED Operation a Set A TR IGGER LEVEL Fully clockwise A TRIGGER SLOPE J b Adjust the generator output for a 1 division display c ADJUST Auto R511 so that the display just triggers on the positive peak of the signal d Set ATR IG G ER LEVEL A TRIGGER SLOPE Fully counterclockwise e ADJUST Auto R512 so that the display just triggers on the negative ...

Page 159: ...able display can be obtained by adjusting the B TRIGGER LEVEL control for both positive and negative going positions o f the B TRIGGER SLOPE switch g Set VERTICAL MODE CH 2 HORIZONTAL MODE A h Move the generator output from the CH 1 OR X input connector to the CH 2 OR Y input connector Set VERTICAL MODE to CH 2 i Repeat parts d through f REV SEP 1981 ...

Page 160: ...C AL MODE to CH 2 r Repeat part f s Disconnect the test setup 4 Check External Triggering a Set VOLTS DIV both 10mV ASEC DIV 10 VERTICAL MODE CH 1 b Connect the test setup as shown in Figure 4 1 c Set the leveled sine wave generator to produce a 5 division 50 kHz display d Set VERTICAL MODE CH 2 A SEC DIV 0 2 ms A SOURCE EXT 5 19 ...

Page 161: ...VOLTS DIV both 50 mV VERTICAL MODE CH 1 A SEC DIV 20 ms A SOURCE INT 5 20 ...

Page 162: ...q Repeat part g r Disconnect the test setup REV SEP 1981 ...

Page 163: ...S DIV Variable CAL detent Channel 1 AC GND DC DC Horizontal POSITION Midrange HORIZONTAL MODE A A S E C D IV 20 as A AND B SEC DIV Variable CAL detent Trigger VAR HOLDOFF NORM ATR IG G ER MODE AUTO A TRIGGER SLOPE J ATR IG G ER LEVEL Midrange A B INT VERT MODE A SOURCE INT REV SEP 1981 ...

Page 164: ...ck PROBE ADJUST Operation a Set CH 1 VOLTS DIV 10mV ASE C D IV 0 5ms b Connect the P6120 Probe to the CH 1 OR X input connector and insert the probe tip into the PROBE ADJUST jack on the instrument front panel If necessary adjust the probe compensation for a flat topped square wave display c CHECK Display is 5 divisions 1 division 4 to 6 divisions d Disconnect the test setup 5 21 ...

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Page 166: ...t damage 1 Minimize handling of static sensitive components 2 Transport and store static sensitive components or assemblies in their original containers or on a metal rail Label any package that contains static sensitive components or assemblies 3 Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these components Servicing static sensitive comp...

Page 167: ... Most Sensitive 1 ECL 2 Schottky signal diodes 3 Schottky TTL 4 High frequency bipolar transistors 5 JFET 6 Linear microcircuits 7 Low power Schottky TTL 8 TTL Least Sensitive 9 aVoltage equivalent for levels voltage discharged from a 100 pF capacitor through a resistance of 100 fi 1 100 to 500 V 2 200 to 500 V 3 250 V 4 500 V 5 400 to 600 V 6 600 to 800 V 7 400 to 1000 V est 8 900 V 9 1200 V ...

Page 168: ...cumulation of d irt in the instrument can cause overheating and com ponent breakdown D irt on components acts as an insulating blanket preventing efficient heat dissipation It also provides an electrical conduction path that could result in instrument failure especially under high humidity conditions C A U T I O N Avoid the use o f chemical cleaning agents which m ight damage the plastics used in ...

Page 169: ...int free cloth dampened w ith either denatured alcohol or a mild detergent and water solution Interior To gain access to internal portions of the instrument for inspection and cleaning refer to the Removal and Replacement Instructions in the Corrective Maintenance part of this section INSPECTION Inspect the internal portions of the instrument for damage and wear using Table 6 3 as a guide Deficien...

Page 170: ...ive wires or cables Chassis Dents deformations and damaged hardware Straighten repair or replace defective hardware If any electrical component is replaced conduct a Performance Check of the affected circuit and of other closely related circuits see Section 4 If repair or replace ment w ork is done on any of the power supplies conduct a complete Performance Check and if so indicated an instrument ...

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Page 172: ...uit board on which it is mounted using dry low pressure air 3 Bake the switch and the circuit board at 75 C 167 F for 15 minutes to eliminate all moisture 4 Spray a very small amount only about a 1 2 second squirt of a recommended lubricant such as No Noise into the slots at the top of the switch housing 5 Rotate the switch control knob about 180 and again spray a very small amount of lubricant in...

Page 173: ...djustment of the affected circuits Complete Performance Check and Adjustment instruc tions are given in Sections 4 and 5 The Performance Check Procedure can also be helpful in localizing certain trouble in the instrument In some cases m inor problems may be revealed or corrected by readjustment If only a partial adjustment is performed see the interaction chart Table 5 1 for possible adjustment in...

Page 174: ...on the appropriate circuit board illustration Circuit Board illustrations Circuit board illustrations showing the physical location of each component are provided for use in conjunction with each schematic diagram Each board illustration can be found on the back side of a foldout page preceding the schematic diagram s to which it relates If more than one schematic diagram is associated w ith a par...

Page 175: ...board can be isolated to the faulty board by disconnecting appropriate service jumpers Grid Coordinate System Each schematic diagram and circuit board illustration has a grid border along its left and top edges A table located adjacent to each schematic diagram lists the grid coordinates of each component shown on that schematic To aid in physically locating a component on the respective circuit b...

Page 176: ...re 9 1 at the beginning of the Diagrams section RESISTOR COLOR CODE Resistors used in this instru ment are carbon film composition or precision metal film types They are color coded w ith the EIA color code however some metal film resistors may have the value printed on the body The color code is interpreted by starting with the stripe that is nearest to one end of the resistor Composition resisto...

Page 177: ... the circuit board Slot numbers are usually molded into the holder When a connection is made to circuit board pins ensure that the triangle on the holder and the triangle on the circuit board are aligned w ith each other see Figure 6 1 TROUBLESHOOTING EQUIPMENT The equipment listed in Table 4 1 or equivalent equip ment may be useful when troubleshooting this instrument TROUBLESHOOTING TECHNIQUES T...

Page 178: ...If there is any question about the correct function or operation of any control refer to either the Operating Instructions Section 2 in this manual or to the instrument Operators Manual 2 Check Associated Equipment Before proceeding ensure that any equipment used with this instrument is operating correctly Verify that input signals are properly connected and that the inter connecting cables are no...

Page 179: ... the power supplies whenever trouble symptoms appear in more than one circuit The correct output voltage and ripple for each supply should be measured between the supply test point and chassis ground see Diagram 9 and its associated circuit board illustration When checking power supply circuitry utilizing common as the reference use either a DMM or an oscilloscope and observe the preceding WARNING...

Page 180: ...cedures describe methods of checking individual components Two lead components that are soldered in place are most accurately checked by first disconnecting one end from the circuit board This isolates the measurement from the effects of surrounding circuitry See Figure 9 1 for value identification or Figure 9 2 for typical semiconductor lead configuration When checking semiconductors observe the ...

Page 181: ...developed across the resistors in series w ith it if it is open no voltage w ill be developed across the resistors in series w ith it unless current is being supplied by a parallel path When checking emitter to base junctions do not use an ohmmeter range that has a high internal current High current can damage the transistor Reverse biasing the emitter to base junction with a high current may degr...

Page 182: ...n or a shorted condition by measuring the resistance between terminals with an ohmmeter set to a range having a low internal source current such as the R X 1 k 2 range The diode resistance should be very high in one direction and very low when the meter leads are reversed Silicon diodes should have 0 6 to 0 8 V across their junctions when conducting Higher readings indicate that they are either re...

Page 183: ... be checked as well as the performance of other closely related circuits Since the power supplies affect all circuits performance of the entire instrument should be checked if work has been done in any of the power supplies or if the power transformer has been replaced Readjustment of the affected circuitry may be necessary Refer to the Per formance Check Procedure and Adjustm ent Procedure Sectio...

Page 184: ...andard electronic components can usually be obtained from a local commercial source Before purchasing or ordering a part from a source other than Tektronix Inc please check the Replaceable Electrical Parts list Section 8 for the proper value rating tolerance and description NOTE Physical size and shape o f a component may affect instrument performance particularly at high fre quencies Always use d...

Page 185: ...in connectors are used to connect wires to the inter connecting pins They are grouped together and mounted in a plastic holder and should be removed reinstalled or replaced as a unit If an individual wire or connector in the assembly is faulty the entire cable assembly should be replaced To provide correct orientation of this m ultipin connector when it is reconnected to its mating pins an arrow i...

Page 186: ...t heat adjacent conductors consecutively Apply heat to pins at alternate sides and ends o f the 1C as solder is removed Allow a moment for the circuit board to cool before proceeding to the next pin The heat sink mounted power supply transistors are insulated from the heat sink In addition a heat sink compound is used to increase heat transfer capabilities Reinstall the insulators and replace the ...

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Page 188: ...or place a heat block between the com ponent body and the solder joint Apply only enough solder to make a firm joint A fter soldering clean the area around the solder connection w ith an approved flux removing solvent such as isopropyl alcohol and allow it to air dry Attem pts to unsolder remove and resolder leads from the component side o f a circuit board may cause damage to the reverse side o f...

Page 189: ...ircuit board If the component is replaced while the board is installed in the instrument cut the leads so they protrude only a small amount through the reverse side of the circuit board Excess lead length may cause shorting to other conductive parts 4 Insert the leads into the holes of the board so that the replacement component is positioned the same as the original component Most components shou...

Page 190: ...power cord through the rear panel as the panel is removed 4 Pull the front panel and attached chassis forward and out of the cabinet To reinstall the cabinet perform the following steps 5 Slide the chassis frame into the cabinet from the front until the cabinet is fully into the front panel groove and the rear of the cabinet is flush with the rear of the chassis 6 Feed the attached power cord if a...

Page 191: ... inal o f the m ultiplier and the crt high voltage anode lead to the main instrument chassis after disconnecting the high voltage lead 2 Unplug the crt anode lead connector from the High Voltage M ultiplier at the front left corner of the High Voltage shield and discharge it to the chassis 3 Remove tw o screws that retain the plastic crt frame and light filter to the front panel Remove the crt fra...

Page 192: ...the Main circuit board Press gently on the rear o f the cover and slide it forward 2 Remove the screw securing the High Voltage shield to the Main circuit board located at the bottom o f the circuit board near the right side of the frame 3 Remove two screws securing the left rear o f the High Voltage shield to the back of the chassis frame 4 Remove the screw from the front upper right hand corner ...

Page 193: ...vacuum desoldering tool to unsolder the 27 pins which secure the A lt Sweep circuit board to the Main circuit board from the Main circuit board 2 Remove the A lt Sweep circuit board from the instru ment by unclipping it from the plastic holder attached to the High Voltage shield 3 If component removal is desired remove the tw o nuts which secure the shield to the A lt Sweep circuit board and remov...

Page 194: ...emove the nut and washers securing the B SEC DIV knob pull o ff the knob and collet from the shaft assembly 5 Use a 1 16 inch Allen wrench to loosen the set screws which secure the A SEC DIV dial to the shaft assembly 6 Disconnect the following connectors from the Attenuator Sweep circuit board a P I011 a four wire connector located behind the CH 1 VOLTS DIV switch assembly b P2011 a four wire con...

Page 195: ...ard and the front panel Care fully align the 10 interconnecting pins on the Front Panel circuit board w ith their corresponding connectors on the Attenuator Sweep circuit board Push the board forward into position ensuring that the tw o screws in the bottom shield engage the front panel bracket 13 Tighten tw o screws securing the shield to the front panel bracket loosened in step 8 14 Reinstall th...

Page 196: ...ront panel Chan nel 1 and Channel 2 POSITION A B SWP SEP Horizontal POSITION AUTO FOCUS AUTO INTENSITY A TR IG GER LEVEL and B TRIGGER LEVEL 4 Unplug the three wire B DELAY TIME POSITION potentiometer connector P7055 from the Main circuit board located in front of the High Voltage shield 5 Unsolder the resistors from the CH 1 OR X CH 2 OR Y and EXT INPUT connectors and disconnect the two wire conn...

Page 197: ... f the Main circuit board as its jo in t is heated To reinstall the Front Panel circuit board perform the following steps 12 Insert but do not solder the 39 wire straps on the Front Panel circuit board into their corresponding holes in the Main circuit board unsoldered in step 10 13 Align the tw o frame assemblies disassembled in step 9 making sure the POWER extension shaft button is in place in t...

Page 198: ...ain circuit board perform the following steps 1 Remove the Attenuator Sweep circuit board seethe Attenuator Sweep Circuit Board removal procedure 2 Disconnect the three wire B DELAY TIME POSI TION potentiometer connector P7055 from the Main circuit board located in front of the High Voltage shield 3 Remove the High Voltage shield see the High Voltage Shield removal procedure 4 Remove the A lt Swee...

Page 199: ...nsolder the 39 interconnecting wire straps connecting the Main circuit board to the Front Panel circuit board from the Main circuit board NOTE I f a vacuum desoldering tool is not available lift each wire strap out o f the Main circuit board as its jo in t is heated Use care to maintain as nearly as possible the original shape and spacing o f the wire straps to facilitate replacing the circuit boa...

Page 200: ...cket wires at the loca tions noted in step 9 24 Insert and resolder the EXT Z AXIS connector wire into the Main circuit board 25 Reconnect the leads of L925 inductor the fuse holder the power cord connector and four wires from the Current Lim it board removed in step 7 26 Insert the POWER switch extension shaft push button assembly into the front panel from the rear Use a flat bit screwdriver to h...

Page 201: ...s from the Current Lim it board P801 P802 P803 and P804 3 Remove the screw and nut which secure the Current Lim it board to the chassis frame To reinstall the Current Lim it board perform the following steps 4 Reinstall the securing screw and nut removed in step 3 5 Reconnect the four single wire connectors removed in step 2 6 Reinstall the High Voltage shield see the High Voltage Shield reinstall...

Page 202: ... 6 19 ...

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Page 204: ...7 1 ...

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Page 206: ...es codes names and addresses of manufac turers of components listed in the Electrical Parts List ABBREVIATIONS Abbreviations conform to American National Standard Y1 1 COMPONENT NUMBER column one of the Electrical Parts List A numbering method has been used to identify assemblies subassemblies and parts Examples of this numbering method and typical expansions are illustrated by the following Examp...

Page 207: ...ON column five of the Electrical Parts List In the Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification the U S Federal Cataloging Handbook H6 1 can be utilized where possible MFR CODE column six of the Electrical Parts List Indicates the code number of the actual manuf...

Page 208: ...OL WORKS INC PAKTRON DIV ELECTRA MIDLAND CORP MEPCO ELECTRA INC PREM ENTERPRISES INC EMCON DIV OF ILLINOIS TOOL WORKS INC SOLITRON DEVICES INC SEMICONDUCTOR GROUP BERG ELECTRONICS INC GENERAL SEMICONDUCTOR INDUSTRIES INC CORNING GLASS WORKS ELECTRONIC COMPONENTS DIVISION NATIONAL SEMICONDUCTOR CORP IEE SCHADOW INC BOURNS INC TRIMPOT PRODUCTS DIV MIDWEST COMPONENTS INC HEWLETT PACKARD COMPANY CENTR...

Page 209: ...ROUTE 45 6435 N PROESEL AVENUE 87 MARSHALL ST 2155 N FORBES BLVD 2536 W UNIVERSITY ST 644 W 12TH ST MOUNTAIN VIEW CA 94042 YANKTON SD 57078 DOVER NH 03820 WATERTOWN MA 02172 LOS GATOS CA 95030 SANTA ANA CA 92704 SAN GABRIEL CA 91776 LAWRENCE MA 01841 ANAHEIM CA 92806 SUNNYVALE CA 94086 VIENNA VA 22180 MINERAL WELLS TX 76067 MCHENRY IL 60050 SAN DIEGO CA 92121 SAN DIEGO OPERS CA 92123 NEW CUMBERLAN...

Page 210: ...REV AUG 1982 8 3 ...

Page 211: ...DI 270PF 10 100V 72982 CAP FXD CER DI 470PF 10 50V 12969 CAP FXD MICA D 10PF 5 100V 00853 CAP FXD CER DI 22PF 5 50V 72982 CAP FXD CER DI 22PF 10 100V 72982 CAP FXD CER DI 270PF 10 100V 72982 CAP FXD CER DI 0 001UF 80 20 100V 20932 CAP FXD ELCTLT 2 2UF 20 20V 56289 CAP FXD CER DI 0 01UF 10 100V 04222 CAP FXD ELCTLT 10UF 20 15V 56289 CAP FXD PLSTC 0 0047UF 5 100V 84411 CAP FXD CER DI 0 1UF 20 50V 04...

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Page 213: ...X CAP FXD CER DI 0 001UF 80 20 I00V A10C606 281 0862 00 XB020500 CAP FXD CER DI 0 001UF 80 20 100V A10C607 281 0862 00 B010100 B018549X CAP FXD CER DI 0 001UF 80 20 100V A10C608 281 0775 00 CAP FXD CER DI 0 1UF 20 50V A10C610 281 0775 00 CAP FXD CER DI 0 1UF 20 50V A10C614 290 0135 00 CAP FXD ELCTLT 15UF 20 20V A10C618 281 0773 00 CAP FXD CER DI 0 OlUF 10 100V A10C619 281 0791 00 B010100 B011229X ...

Page 214: ...02Z 04222 SA205E104MAA 04222 SA205E104MAA 04222 SA205E104MAA 20932 401 ES 100AD102Z 20932 401 ES 100AD102Z 20932 401 ES 100AD102Z 04222 SA205E104MAA 04222 SA205E104MAA 56289 150D156X0020B2 04222 GC70 1C103K 72982 8035D2AADX5R271K 80009 295 0138 00 80009 295 0138 01 04222 GC10 1A5R6D 04222 SA205E104MAA 72982 8035D9AADX5R102M 72982 8035D9AADX5R102M 56289 150D106X0015B2 04222 SA205E104MAA 04222 GC701...

Page 215: ...V 04222 SA205E104MAA A10C848 281 0775 00 CAP FXD CER DI 0 1UF 20 50V 04222 SA205E104MAA A10C849 283 0057 00 CAP FXD CER DI 0 1UF 80 20 200V 56289 2C20Z5U104Z200B A10C852 283 0057 00 CAP FXD CER DI 0 1UF 80 20 200V 56289 2C20Z5U104Z200B A10C854 283 0057 00 CAP FXD CER DI 0 1UF 80 20 200V 56289 2C20Z5U104Z200B A10C861 283 0057 00 CAP FXD CER DI 0 1UF 80 20 200V 56289 2C20Z5U104Z200B A10C863 281 0791...

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Page 217: ...ND DEVICE SILICON 30V 130MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 130MA SEMICOND DEVICE SILICON 30V 150MA SEMICOND DEVICE SILICON 30V 150M...

Page 218: ... 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 IN4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 01295 1N4152R 50434 5082 2672 01295 1N4152R 01295 1N4152R 50434 5082 2672 8 7 ...

Page 219: ...MICOND DEVICE SILICON 400V 750MA A10CR985 152 0040 00 SEMICOND DEVICE SILICON 600V 1A A10DS854 150 0035 00 LAMP GLOW 90V 0 3MA A10DS856 150 0035 00 LAMP GLOW 90V 0 3MA A10DS867 150 0035 00 LAMP GLOW 90V 0 3MA A10DS868 150 0035 00 LAMP GLOW 90V 0 3MA A10DS870 150 0035 00 LAMP GLOW 90V 0 3MA A10E199 276 0532 00 SHIELDING BEAD A10E299 276 0532 00 SHIELDING BEAD A10L971 108 1058 00 COIL RF FIXED 10UH ...

Page 220: ...2969 UTR308 12969 UTR308 12969 UTR308 12969 UTR308 12969 UTR308 12969 UTR307 15238 LG109 53944 A1B 3 53944 A1B 3 53944 A1B 3 53944 A1B 3 53944 A1B 3 02114 56 590 65 4A6 02114 56 590 65 4A6 02113 B8724 02113 B8724 22526 47357 22526 47357 22526 47357 22526 47357 22526 47357 00779 61134 1 00779 61134 1 REV MAY 1982 ...

Page 221: ...1 1042 00 SEMICOND DVC SE MATCHED PAIR FET 01295 SKA5390 A10Q414 151 0198 00 TRANSISTOR SILICON NPN SEL FROM MPS918 04713 SPS8802 1 A10Q474 151 0276 00 TRANSISTOR SILICON PNP 80009 151 0276 00 A10Q476 151 0276 00 TRANSISTOR SILICON PNP 80009 151 0276 00 A10Q492 151 0221 02 TRANSISTOR SILICON PNP 80009 151 0221 02 A10Q493 151 0221 02 TRANSISTOR SILICON PNP 80009 151 0221 02 A10Q503 151 0424 00 TRAN...

Page 222: ...15 0102 00 RES FXD CMPSN IK OHM 52 0 25W 01121 CB1025 A10R186 311 1238 00 RES VAR NONWIR 5K OHM 102 0 50W 73138 72 27 0 A10R187 321 0091 00 RES FXD FILM 86 6 OHM 12 0 125W 91637 MFF1816G86R60F A10R188 321 0162 00 RES FXD FILM 475 OHM 12 0 125W 91637 MFF1816G475R0F A10R189 315 0621 00 RES FXD CMPSN 620 OHM 52 0 25W 01121 CB6215 A10R192 321 0231 00 RES FXD FILM 2 49K OHM 12 0 125W 91637 MFF1816G2490...

Page 223: ...PSN IK 0HM 5 0 25W 01121 CB1025 A10R296 315 0681 00 RES FXD CMPSN 680 OHM 5 0 25W 01121 CB6815 A10R297 315 0102 00 RES FXD CMPSN IK OHM 5 0 25W 01121 CB1025 A10R299 315 0912 00 RES FXD CMPSN 9 IK OHM 5 0 25W 01121 CB9125 A10R300 315 0512 00 RES FXD CMPSN 5 IK OHM 5 0 25W 01121 CB5125 A10R301 315 0512 00 RES FXD CMPSN 5 IK OHM 5 0 25W 01121 CB5125 A10R302 315 0512 00 RES FXD CMPSN 5 IK OHM 5 0 25W ...

Page 224: ...F1816G11300F A10R386 321 0196 00 RES FXD FILM 1 07K OHM 1 0 125W 91637 MFF1816G10700F A10R387 321 0190 00 RES FXD FILM 931 OHM 1Z 0 125W 91637 MFF1816G931R0F A10R388 323 0148 00 RES FXD FILM 340 OHM 1Z 0 50W 91637 MFF1226G340R0F A10R389 323 0148 00 RES FXD FILM 340 OHM 1Z 0 50W 91637 MFF1226G340R0F A10R390 322 0084 00 RES FXD FILM 73 2 0HM 1Z 0 25W 91637 CMF1842G73R20F A10R391 315 0271 00 RES FXD ...

Page 225: ......

Page 226: ...X C O C O C O C O C O C O C O C O C O C O C O C O C O C O C O z C O C O C O C O C O C O C O C O C O C O z 25 z z z z M 50 Z z z z z z Z z z z Z z z z z z z Z z z Z z z z z to to LO P LO vn 00 0 LO LO L0 I 1 Ln to P to i 00 O t to I 1 k Ln bn P O 4 O o O U LO bn LO to O t to 00 O to to p O 0 O X i 1 i 1 U O LO Ln 1 o O O O sO X to Ln v bO 00 O 0 LO O X 0 O I si X X X O X X X O O X 0 X X X X X X X X...

Page 227: ... 00 RES FXD CMPSN 680 OHM 5 0 25W 01121 CB6815 A10R637 321 0322 00 RES FXD FILM 22 IK OHM 1 0 125W 91637 MFF1816G22101F A10R638 321 0319 00 RES FXD FILM 20 5K OHM 1 0 125W 91637 MFF1816G20501F A10R639 315 0153 00 RES FXD CMPSN 15K OHM 5 0 25W 01121 CB1535 A10R640 315 0512 00 RES FXD CMPSN 5 IK OHM 5 0 25W 01121 CB5125 A10R642 315 0222 00 RES FXD CMPSN 2 2K 0HM 5Z 0 25W 01121 CB2225 A10R649 315 051...

Page 228: ... T O X X X c n c n c n c n c n c n c n c n c n c n c n c n X X c n c n c n X X c n z z z z z z z z z z Z z z z z X z ro a s ro p K a s h 1 O h c o ro 1 i o S J ro ro C n 4 S j 0 0 o C OX o o o o O 4 o sl s sj X X 0 0 X X o S j sj ro X o X O o X X o X X o o o o X X o o X p d X o o o o X p d s p d o o p o p d o X p d p d o X P Co o o X 2 X S o o c c p d 2 5 o p d p d X X p d p d X p d p d X 2 E Sz X...

Page 229: ...6 315 0471 00 RES FXD CMPSN 470 OHM 5 0 25W 01121 CB4715 A10R877 315 0183 00 RES FXD CMPSN 18K OHM 5 0 25W 01121 CB1835 A10R878 301 0105 00 RES FXD CMPSN 1M OHM 5 0 50W 01121 EB1055 A10R879 301 0105 00 RES FXD CMPSN 1M OHM 5 0 50W 01121 EB1055 A10R880 301 0105 00 RES FXD CMPSN 1M OHM 5 0 SOW 01121 EB1055 A10R881 301 0105 00 RES FXD CMPSN 1M OHM 5 0 50W 01121 EB1055 A10R882 301 0105 00 RES FXD CMPS...

Page 230: ......

Page 231: ...5 156 0728 00 B010100 B019249 MICROCIRCUIT DI QUAD 2 INP POS AND GATES A10U305 156 0728 02 B019250 MICROCIRCUIT DI QUAD 2 IPUT STATE W OC A10U310 156 0721 00 B010100 B012542 MICROCIRCUIT DI ST POS NAND GATES W TP OUT A10U310 156 0721 02 B012543 MICROCIRCUIT DI QUAD 2 IN NAND SCHMITT TRI A10U315 156 0384 00 B010100 B019249 MICROCIRCUIT DI QUAD 2 INPUT NAND GATE A10U315 156 0384 02 B019250 MICROCIRC...

Page 232: ... 80009 214 0579 00 80009 214 0579 00 80009 214 0579 00 80009 156 1294 00 02735 CA3046 80009 156 1294 00 27014 DM74LS09 80009 156 0728 02 27014 DM74LS132N 04713 SN74LS132NDS 80009 156 0384 00 01295 SN74LS03 80009 156 0388 00 07263 74LS74A 80009 156 1294 00 80009 156 0534 00 04713 MC10102 P OR L 18324 MC1458N 07263 74F74 01295 SN74S00NP3 01295 SN74LS00 27014 DM74LS51 N OR J 01295 SN74LS51 07263 9602...

Page 233: ...566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W392 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W397 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W399 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W418 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W421 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 ...

Page 234: ......

Page 235: ... CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W844 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W845 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W846 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W847 131 0566 00 BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 A10W854 131 0566 00 B010100 B012542X BUS CONDUCTOR DUMMY RES 2 ...

Page 236: ...1R401 315 0820 00 RES FXD CMPSN 82 OHM 5 0 25W A11R402 321 0807 00 RES FXD FILM 900K OHM 1 0 125W A11R403 321 0617 00 RES FXD FILM 11IK OHM 1 0 125W A11R404 321 0468 00 RES FXD FILM 732K OHM 1 0 125W A11R405 315 0101 00 RES FXD CMPSN 100 OHM 5 0 25W A11R455 311 2149 00 RES VAR NONWIR PNL 250 OHM 20 0 50W A11R530 315 0124 00 B010100 B017399 RES FXD CMPSN 120K OHM 5 0 25W A11R530 315 0114 00 B017400...

Page 237: ... 01121 CB1055 01121 W8615 91637 MFF1816G46400F 01121 W8615 01121 CB8205 91637 HFF1104F90002F 91637 MFF1816G11102F 24546 NA4D7323F 01121 CB1015 01121 W8612 01121 CB1245 01121 CB1145 01121 CB1245 01121 CB4345 01121 CB1825 91637 MFF1816G30100F 91637 MFF1816G2O0R0F 01121 W8616 01121 CB9125 01121 CB1235 01121 W8615 01121 W8615 01121 CB5125 73138 91 84 0 REV AUG 1982 ...

Page 238: ...A l l W O J O A11W702 1 1 1 U 3 D D U U 131 0566 00 D U O U r llD llU U 1U 1V l E i O Z J f J i fv w v j BUS CONDUCTOR DUMMY RES 2 375 22 AWG 55210 L 2007 1 REV MAY 1982 8 21 ...

Page 239: ...9B A12C241 283 0175 00 CAP FXD CER DI 10PF 52 200V 72982 8101B210C0G0100J A12C242 283 0201 00 CAP FXD CER DI 27PF 102 200V 72982 8101B210X7R0270K A12C244 281 0775 00 CAP FXD CER DI 0 1UF 202 50V 04222 SA205E104MAA A12C625 283 0631 00 CAP FXD MICA D 95PF 12 100V 00853 D151E950F0 A12C626 281 0202 00 CAP VAR PLSTC 1 5 5 5PF 100V 80031 2807C1R406MM02F A12C628A B CID 295 0194 00 CAP SET MATCHED 2 EA 1 ...

Page 240: ......

Page 241: ...SEL TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON PNP TRANSISTOR SILICON PNP SEMICOND DVC SE MATCHED PAIR FET TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN SEMICOND DVC SE MATCHED PAIR FET TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN TRANSISTOR SILICON NPN RES FXD CMPSN 24 OHM 5 0 25W RE...

Page 242: ...263 S032677 04713 SPS8223 04713 SPS8223 04713 SPS8224 01121 CB2405 91637 MFF1816G90002D 01121 BB3305 91637 MFF1816G11102D 01121 CB6205 01121 CB1015 91637 HFF1104G99002D 01121 CB1205 91637 MFF1816G10101D 01121 CB9105 91637 MFF1816D10002B 24546 NC55C9003B 01121 CB1075 01121 CB1045 01121 CB4355 01121 EB1225 01121 CB1005 01121 CB1025 91637 MFF1816G226R0F 91637 MFF1816G200ROF 01121 CB4705 8 23 ...

Page 243: ...SN 1 2K 0HM 5 0 50W 01121 EB1225 A12R225 321 0131 00 RES FXD FILM 226 OHM 1 0 125W 91637 MFF1816G226R0F A12R226 321 0126 00 RES FXD FILM 200 OHM 1 0 125W 91637 MFF1816G200R0F A12R227 315 0470 00 RES FXD CMPSN 47 OHM 5 0 25W 01121 CB4705 A12R231 321 0254 00 RES FXD FILM 4 32K OHM 1 0 125W 91637 MFF1816G43200F A12R232 321 0229 00 RES FXD FILM 2 37K OHM 1 0 125W 91637 MFF1816G23700F A12R233 315 0101 ...

Page 244: ......

Page 245: ...10 0 50W RES FXD FILM 2 32K OHM 1 0 125W RES FXD FILM 2 55K OHM 1 0 125W RES FXD CMPSN IK OHM 5 0 25W RES FXD CMPSN 6 8K OHM 5 0 25W RES FXD CMPSN 47 OHM 5 0 25W RES FXD CMPSN 220 0HM 5 0 25W RES FXD CMPSN 100 OHM 5 0 25W RES FXD CMPSN 1 5K 0HM 5 0 25W RES FXD CMPSN 6 8K OHM 5 0 25W RES FXD CMPSN 3 9K OHM 5 0 25W RES FXD CMPSN 8 2K OHM 5 0 25W RES FXD CMPSN 8 2K OHM 5 0 25W RES FXD FILM 442 OHM 1 ...

Page 246: ...925 01121 CB8225 01121 CB8225 91637 MFF1816G442R0F 01121 CB5615 01121 CB9115 91637 MFF1816G13700F 73138 91 84 0 91637 MFF1816G11501F 01121 CB2725 01121 CB3625 01121 CB1005 01121 CB5605 01121 CB1005 50157 2D1595 50157 2D1595 80009 260 2025 00 80009 260 2025 00 80009 260 2023 00 02735 90593 80009 155 0227 00 02735 90593 80009 155 0227 00 04713 SZG35009K4 04713 SZG20 8 25 ...

Page 247: ...8 26 REV AUG 1982 ...

Page 248: ...25 A13R574 315 0185 00 RES FXD CMPSN 1 8M OHM 5Z 0 25W 01121 CB1855 A13R575 315 0512 00 RES FXD CMPSN 5 IK OHM 5Z 0 25W 01121 CB5125 A13R579 315 0511 00 RES FXD CMPSN 510 OHM 5Z 0 25W 01121 CB5115 A13R581 321 0191 00 RES FXD FILM 953 OHM 1Z 0 125W 91637 MFF1816G953R0F A13R582 315 0820 00 RES FXD CMPSN 82 OHM 5Z 0 25W 01121 CB8205 A13R584 301 0470 00 RES FXD CMPSN 47 OHM 5Z 0 50W 01121 EB4705 A13R5...

Page 249: ...RTER MICROCIRCUIT DI QUAD 2 INPUT AND GATE A13U693 156 0480 02 B012543 A13U696 156 1611 00 A13VR584 152 0195 00 B010100 B012542 A13VR584 152 0662 00 B012543 A13W556 131 0566 00 A13W661 131 0566 00 MICROCIRCUIT DI QUAD 2 INP GATE MICROCIRCUIT DI DUAL D TYPE EDGE TRIGGERED SEMICOND DEVICE ZENER 0 4W 5 IV 5 SEMICOND DEVICE ZENER 0 4W 5V 1 BUS CONDUCTOR DUMMY RES 2 375 22 AWG BUS CONDUCTOR DUMMY RES 2...

Page 250: ...295 SN74LS00CN OR J 01295 SN74LS00 80009 156 0385 00 01295 SN74LS04 01295 SN74LS08 N OR J 01295 SN74LS08NP3 07263 74F74 04713 SZ11755 04713 SZG195 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 55210 L 2007 1 22526 48283 029 REV MAY 1982 ...

Page 251: ...1 00 XB022000 A18R936 315 0470 00 XB022000 A18R937 301 0822 00 XB022000 SfcMIUUND Utvioa SiL lU JH 1 3V u urm SEMICOND DEVICE RECT SI 600V 3A FAST CORE EM TOROID FERRITE 0 375 OD X 0 187 COIL RF FIXED 82UH COIL RF FIXED 82UH TERM QIK DISC CKT BD MT 0 11 X 0 02 TERM QIK DISC CRT BD MT 0 U X 0 02 TERM QIK DISCiCKT BD MT 0 11 X 0 02 TERM QIK DISC CKT BD MT 0 11 X 0 02 TRANSISTOR SILICON PNP TRANSISTO...

Page 252: ...5 SKB3334 04713 STP3002 03508 C106B2X283 01121 CB5125 01121 CB5125 01121 CB5615 01121 CB5615 01121 GB1545 01121 CB1045 01121 CB1045 01121 CB1045 01121 CB3025 01121 CB5125 01121 CB2035 91637 MFF1816G10001F 91637 MFF1816G86601F 01121 CB1545 01121 CB6825 01121 CB1035 01121 CB3915 01121 CB1035 01121 CB3025 91637 RS1AR2000JT R 91637 CW2B 3R00J 01121 CB1215 01121 CB4705 01121 EB8225 8 29 ...

Page 253: ...8 30 REV AUG 1982 ...

Page 254: ...268 00 152 0286 00 152 0149 00 BU1U1UU B010100 B021999X B010100 B015899 B015900 B021999X B010100 B021999X K B S f A U W U U U n n 3 A 3 w RES THERMAL 500 OHM 10 25 DEG C SEMICOND DEVICE ZENER 0 4W 56V 5 SEMICOND DEVICE ZENER 0 4W 75V 5 SEMICOND DEVICE ZENER 0 4W 10V 5 REV AUG 1982 ...

Page 255: ...50157 2D1595 80009 152 0268 00 80009 152 0286 00 04713 SZG35009K3 8 31 ...

Page 256: ...R658 311 1183 01 B017000 RES VAR WW PNL 2K OHM 5 2W 32997 3540S 91 202 V870 154 0838 00 ELECTRON TUBE CRT T4652 31 2 80009 154 0838 00 8 32 REV AUG 1982 ...

Page 257: ...hefacing diagram are listed in the lookup table When more than one schematic diagram is used to illustrate the circuitry on a circuit board the circuit board illustration may only appear opposite the first diagram on which it was il lustrated the lookup table will list the diagram number of other diagrams that the circuitry of the circuit board appears on Function Block Title Internal Screwdriver ...

Page 258: ...ULL OUT PAGE TABS FOR CIRCUIT BOARD ILLUSTRATION 5 Locate the Component on the Circuit Board In the manual locate and pull out the tabbed page whose title and Assembly Number correspond with the desired circuit board This information is on the back side of the tabs Using the Circuit Number and grid coordinates locate the component on the Circuit Board Illustration In the circuit board location ill...

Page 259: ...fr 6 Old IAIVH9VIO IOOia Q LZZ ...

Page 260: ...tent GND Display Centered CH 1 Typical voltage measurements located on the schematic diagram were obtained with the instrument operating under the conditions specified in the Waveform Measurement setup Control setting changes required for specific voltages are indicated on each waveform page Measurements are referenced to chassis ground with the exception of the Preregulator and Inverter voltages ...

Page 261: ...agram If a power supply comes up after lifting one of the main jumpers from the power supplyto isolate that supply it is very probable that a short exist in the circuitry on that supply line By lifting jumpers farther down the line the circuit in which a short exist may be located Typical resistance values to ground from the regulated supplies output as measured at the supply test points are 8 6 V...

Page 262: ...PfeOOC TR VC E R O T A T IO N Z Z I 5 sab io R E V A P R I9 CIRCUIT BOARD IN TER C O N N EC TIO N S CIRCUIT BOARD INTERCONNECTIONS ...

Page 263: ...8 SI 05 1 C221 1 P2000 6 1 Q720 7 R147 1 R627 8 S205 1 C225 1 P2000 7 8 Q730 7 R148 1 R628 8 S630 8 C232 1 P2000 8 8 Q731 7 R149 1 R629 8 S734 7 C233 1 P2000 9 7 Q736 7 R203 1 R630 5 U120 1 C234 1 P2000 10 5 R103 1 R205 1 R631 5 U145 1 C236 1 P2010 1 1 R105 1 R206 1 R633 7 U220 1 C237 1 P2010 2 1 R106 1 R207 1 R634 7 U245 1 C239 1 P2010 3 1 R107 1 R208 1 R635 7 VR122 1 C241 1 P2010 4 1 R108 1 R210...

Page 264: ...7 8C 1C R241 7K 2C Cl 37 8D IB R138 5K IB R242 7K 2D Cl 39 3J 3A Q122 2H 2B R139 2J 2A R243 9K 2C Cl 40 2N IB Q125 4H 1A R140 3K 2A R244 8N 2D C141 2K 2B Q133 2H 2A R141 3K 2B R245 8N ID C142 2N 2B Q134 4H 2A R142 2K 2B R246 9K 2C Cl 44 4L 2B Q139 31 2A R143 4K 2A R247 9L 1C C204 7E 3C Q222 7H 2C R144 3N 2B R248 9L 1C C205 7E 3D Q225 8H 2C R145 3N IB R249 8N 2D C207 7E 3D Q233 7H 2C R146 4K 2B C21...

Page 265: ...0 3 6610 Z 083d 2 9920 Z t L LOLd 82 LdO 9 9 90 3 6LO Z 623d 2 920 Z t L LOLd 22L80 9 9 0 3 98 LO Z 823d 2 920 Z t 3 LL0Ld 6 9660 9 3 9 0 3 08 LO Z 223d 2 2 20 Z 1 X LL0Ld 6 3660 0 9 0 3 62 LO Z 923d 2 L2D 6 3261 6 0660 9 2 90 3 92L0 Z S23d 2 8020 6 L261 6 9860 9 6190 3 210 Z 23d 2 9020 3 6633 6 2260 8L90 3 210 Z 323d 2 020 3 66L3 6 9260 L90 3 02 LO Z 023d 3 0 9 0 6 028SQ 6 9260 9 0 L90 3 29 LO ad...

Page 266: ...6 R995 9 W507 4 W 1011 2 t 2 R430 4 R614 4 R817 6 RT356 3 W508 4 W 1011 3 J 2 R431 4 R61 5 4 R820 6 S901 9 W 519 4 W 1011 4 1 2 R432 4 R616 6 R821 6 T448 9 W564 10 W 2011 1 2 R433 4 R618 4 R822 6 T925 9 W571 10 W 2011 2 t 2 R435 4 R619 5 R825 6 T940 9 W 606 10 W 2011 3 4 2 R436 4 R620 5 R826 6 T942 9 W 616 5 W 2011 4 2 R4 7 4 R622 5 R827 6 TP444 4 W 640 5 W4000 1 10 R438 4 R623 5 R828 6 TP500 9 W ...

Page 267: ...H K 2215 Service REV APR 1982 Figure 9 8 Circuit view of A10 Main board CIRCUIT VIEW OF A10 MAIN BOARD FIG 9 8 ...

Page 268: ... 5D U170B 41 3C R252 6C 4E U170C 21 3C R253 7D 4E U170D IF 3C R254 7D 4E U170E 5F 3C R256 7C 5E U197A 5G 3E R258 7F 4E U197B 5H 3E R259 7F 4E U197D 5H 3E R261 9C 5D U197E 5H 3E R262 9C 4E U270A 71 3D R263 8C 4E U270B 91 3D R264 7D 5E U270C 61 3D R266 8C 5E U270D 6F 3D R268 8F 4D U270E 9F 3D R269 8F 4D R270 8F 4D W 170 4C 4D R272 6J 4E W197 3C 5F R273 7H 3E W 198 3C 3E R275 61 3E W199 3C 2E R276 6K...

Page 269: ...MBER CIRCUIT NUMBER SCHEM NUMBER CIRCUIT NUMBER SCHEM NUMBER C101 1 PI 000 2 9 R975 9 W 1000 10 2 Cl 02 1 P8006 1 9 S101 1 W1000 11 3 C202 1 P8006 2 9 S201 1 W1000 12 3 C265 2 R100 1 S264 2 W 1000 13 2 C313 3 R102 1 S305 3 W 1000 14 9 C314 3 R190 2 S31 5 3 W 1000 15 3 C31 5 3 R191 2 S317 3 W1000 16 3 C402 4 R200 1 S390 6 W1000 17 10 C403 4 R202 1 S401 4 W 1000 18 10 C404 4 R290 2 S440 4 W 1000 19 ...

Page 270: ...G 2D R386 9N 2G W1001 11 4C 6A CR288 4G 2D R326 7G 4E R387 9N 2G W 1001 12 8C 6A CR305 7D 5F R327 8G 4E R388 8N 2H W 1001 15 1C 6A CR320 9G 2K R330 3H ID R389 8N 2H W 1001 16 2C 6A CR704 6C 7E R331 4H ID R390 8N 1G W1001 33 7C 9A R332 31 ID R391 8N 21 W 1001 34 7C 9A Q31 6 5G 21 R334 41 ID R392 1L 2F W 1001 35 8C 9A Q331 4H 2D R335 41 ID R393 2M 2F W 4000 7 2K 7F Q335 4H ID R336 4H ID R394 1L IF W...

Page 271: ... R471 6N 2C ID 2D 3D 2D 2D 5D 5E IF 2F 2F 2F 3F 2G 2F 3G IF 7D 8D 1G 2H 2H 3G 4G 4H 4H 5F 5F 5E 6K 5K 61 8D 7D 6J 5J 5J 5K 5K 6K 41 4J 4J 4J 31 41 7E 10A 9B 9A 9B 9A 9A 9A 9B 6D 6D 6D 6D 6C 6D 6D 6D 6D 6F 6F 5D 5D 5D 6C 6C 6D 6D 6E 6E 6D 7C 7C 7D 9C 9C 8D 7D 7D 7D 7D 7C 8D 8D 8D 8C 9C 9C R472 R473 R474 R476 R477 R478 R479 R480 R481 R482 R483 R484 R485 R487 R490 R491 R492 R493 R494 R495 R496 R497 R...

Page 272: ...forms VERTICAL MODE HORIZONTAL MODE A TRIGGER MODE A TRIGGER SOURCE A d B INT CH 1 VOLTS DIV A TRIGGER LEVEL CH 1 INPUT AC GND DC CH 1 A AUTO IN T CH 1 1 V M idrange 1 kH z s in e w a v e 4V P P DC o o o n r L T m r L T L r i r L n j u T J T L iir L J ir L r u r ir L r L r i 3V OV 3V OV 1 1 1 1 1 1 1 SET CH 1 1 AC GND DC TO GND ALT SYNC 1 A GATE SET N 2 5V OV 3826 20 ...

Page 273: ...2 4H 8E R640 4A 7E W 6001 4 4L 8F CR640 5A 7E R642 3C 9F W6001 5 4 3B 8F CR644 3C 9F R666 4E 8E W 6001 6 3B 8F W 6001 7 3B 8F P a rtia l A 1 0 also s h o w n on d iag ra m s 2 3 4 6 7 9 a n d 10 ASSEMBLY A ll CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION J2000 10 2B 3E R645 IB 2E R647 1A 2E R646 IB 2E P a rtia...

Page 274: ...IGGER SOURCE CH 1 AC GND DC CH 1 INPUT B DELAY TIME POSITION B TRIGGER LEVEL ALT 0 1 ms 5 is AUTO V is ib le d is p la y CH 1 I NT DC 1 kH z s in e w a v e 4V P P 5 0 RUN AFTER DLY Q D D D A DUTY 3 8V 0V B DUTY A DISP 3 8V 0V 5 6V 3 2V 3 8V 0V AMPLITUDE VARIES WITH AUTO INTEN CONTROL INTENS LEVEL BLANKED I A SW P B SW P Z AXIS _Z AXIS I SIGNAL SIGNAL A I NT SW P Z AXIS SIGNAL JL 0V 1 5V 5V 58VN 44...

Page 275: ... 6C C852 5L 3K R837 31 7F W836 8M 7A C854 4M 2K R616 2D 7E R839 51 3J W843 61 21 R801 7E 2K R840 5J 3K W 844 7K 7A CR801 71 2K R802 7G 2K R841 5J 3K W854 4M 3K CR802 7H 3J R803 71 3J R842 51 3J W 1001 1 8B 5A CR809 6G 5A R809 6H 5A R844 4J 3K W 1001 8 6B 5A CR828 2F 5B R810 6H 5A R845 6J 3K W 4000 8 1J 7F CR830 2F 6C R811 5G 5B R846 5K 3K W4000 9 6C 7F CR833 4G 5C R812 4F 5C R847 5K 4K W 4000 18l ...

Page 276: ...s HORIZONTAL MODE A A TRIGGER MODE AUTO AC GND DC GND AC Waveforms HORIZONTAL MODE VAR HOLDOFF A TRIGGER MODE AC GND DC b o th A MIN f u l l y ccw AUTO GND Horizontal POSITION start of trace at extreme left of vertical line D Q I D O Q M y L L 13V OV 3826 13 REV OCT 1981 ...

Page 277: ...F 2G 3G 2G 3G R799 VR781 W 399 W696 W 763 W 764 W 840 W841 W 842 W845 W 846 W847 W967 W 969 W 4000 5 W 4000 11 W 6001 9 W6001 1C W 7001 4 W 7001 5 W 7001 6 ___________ 1 8J 2M 8J 4C 3J 3J 91 91 91 9J 9J 9J 8J 81 3C 4C t 3D 4D 9H t 31 t 6F I___________ 4F 2G 31 8G 5F 4F 9F 7F 7F 3J 31 31 5F 4J 7F 7F 8F 8F 6F 6F 6F P a rtia l A 1 0 also s h o w n on d iag ra m s 2 3 4 5 6 9 a n d 10 ASSEMBLY A ll CI...

Page 278: ...R628 2L 4E C628C 91 2E R629 6C IE C628D 9J 2E R636 6L 2E C636 6L 2E R676 8E 2E C675 8J 3E R677 7L 2E C676 8J 3E R678 91 2E C677 7L 3F R679 8L 2E C679 8L 3F R686 5C IF C738 8L 2E R691 6C IE C741 7L 2E R738 8M 2D R741 7M IE P2000 7 1M 4D P2000 8 1M 4D S630A 2K 3D P7000 1 6M ID S630B 2G 3D P7000 2 7M ID S630C 9G 3D P7000 3 8M ID S630 6E 3D P7000 4 7M ID P7000 7 1M ID VR629 6C IF Q629 6C IF P a rtia l...

Page 279: ...3 3N 1J R881 4L 5H VR901 3B 5K C876 5N 1J DS867 2J 51 R882 5L 5H VR913 3C 8K C877 2L 1J DS868 2K 51 R883 5L 5H VR914 5D 8K C878 4L 5H DS870 7K 51 R884 5K 5H VR915 6D 8K C879 4L 5H R886 4N 11 VR938 3E 81 C886 4N 1J L971 51 8G R887 4N 11 VR951 3F 10K C901 2B 5K L972 61 10H R911 4C 8K C912 6C 9K R912 6C 9K W447 5B 5J C915 6D 9K P7001 1 8L 6E R914 4D 8K W448 5B 6G C917 4E 9K P 7 0 0 2 8L 6E R915 5C 8K...

Page 280: ...D NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION NUMBER LOCATION LOCATION C938 2G IB P801 2E IB R933 IF 1C RT935 2F 2B P802 2E IB R935 2F 2C CR932 2E 1A P803 2G IB R936 2F 2B VR933 IF 2C CR934 2E 1A P804 IE IB R937 2F 2A VR934 IE 2B CR935 2F 2C R938 1G IB Q933 IF 2B R939 2G 2B F937 2G 2A Q938 1G 2B CHASSIS MOUNTED PARTS CIRCUIT SCHEM BOARD CIRCUIT SCHEM BOARD CIRCUIT SC...

Page 281: ...4 10 U670 10 W 4001 14 10 Q593 10 R648 10 U690 10 W 4001 15 10 Q662 10 R650 10 U693 10 W 4001 16 10 Q664 10 R652 10 U696 10 W 4001 17 10 Q690 10 R653 10 VR584 10 W 4001 18 10 R552 10 R654 10 VR664 10 W 4001 19 10 R553 10 R655 10 W 556 10 W4001 20 10 R554 10 R656 10 W661 10 W4001 21 10 R555 10 R657 10 W662 10 W4001 22 10 R556 10 R659 10 W665 10 W4001 23 10 R560 10 R660 10 W 670 10 W4001 24 10 R561 ...

Page 282: ...2215 Service THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 283: ...D 8F P7055 3 3C 10F W 1001 18 9C 7A W 4000 14 4D 8F ASSEMBLY A IO P a rtia l A IO also s h o w n on d iag ra m s 2 3 4 5 6 7 a n d 9 ASSEMBLY A l l CIRCUIT NUMBER SCHEM LOCATION BOARD LOCATION CIRCUIT NUMBER SCHEM LOCATION BOARD LOCATION CIRCUIT NUMBER SCHEM LOCATION BOARD LOCATION CIRCUIT NUMBER SCHEM LOCATION BOARD LOCATION C650 2C IE S650 2A 2E W 1000 18 9C 4C W 1000 29 2C 4D W 1000 25 2C 4D W ...

Page 284: ... W4001 7 3N 3B Q593 61 IB R657 4G 2C U670A 3L 1C W4001 8 4N 3B Q662 3H 2B R659 4D 2C U670B 4M 1C W4001 9 3N 3B Q664 4G 2C R660 3G 2B U670C 3M 1C W 4001 10 2D 3B Q690 5H 2D R661 3G 2C U670D 1J 1C W4001 11 2N 3B R662 3H 2B U690A 9H ID W 4001 12 2D 3B R552 8G 3A R663 IK IB U690B 8J ID W 4001 13 ID 3B R553 8G 3A R664 3G 3C U690C 4K ID W 4001 14 4D 3B R554 8G 3A R665 3H IB U690D 21 ID W 4001 15 3D 3C R...

Page 285: ...2215 Service R366 R887 A 10 MAIN BOARD ADJUSTMENT LOCATIONS REV OCT 1981 ADJUSTM ENT LOCATIO NS 1 ...

Page 286: ...p P P W r i u P V SZ 1 J l Vc 1 L 1 v c v x t Ir I r 1 1 P 1 V I I U I 1 Y V I X i i L 1 l r f i V p k U C626 5 is TIMING R682 B GAIN C676 5 j s TIMING I t t 0 r JL I V p r I S P s S P i p k r oj i _ j X a I 6 u o o o k a k r j F b o U rll jCttv 9 g i E i r h r f M z Up ii r 1 g i jo o u i i ii m z c n z i o R659 DELAY DIAL START ADJ R654 DELAY DIAL GAIN A 12 ATTENUATOR SWEEP AND A 1 3 A L T SWEEP...

Page 287: ...6 4 V 8 6V W975 8 3 4 to 8 8 6 V 5V W985 4 7 5 to 5 2 5 V 30V W965 2 8 5 to 3 1 5V 100V W966 95 to 105V NOTE A HV probe is r e q u ir e d to measure the 2k V s u p p ly Turn o f f the power and make the t e s t equipment c o n n e c tio n s to the o s c illo s c o p e Set the v o lt m e t e r to re a d a t le a s t 3kV then tu rn the o s c illo s c o p e power back on to take the r e a d in g A f ...

Page 288: ...2 2 1 5 Service 3826 44 ...

Page 289: ... i b l e c a u s e s o f f a i l u r e SPECIFIC NOTES W A R N I N G I The P r e r e g u l a t o r and I n v e r t e r c i r c u i t s h ave a f l o a t i n g common r e f e r e n c e w i t h r e s p e c t to c h a s s i s g ro u n d A c s o u r c e p o t e n t i a l i s p r e s e n t on th e common r e f e r e n c e p o i n t s C onnect th e in s t r u m e n t to th e a c p o w e r s o u rc e th r...

Page 290: ...3826 45A PREREGULATOR AND INVERTER TROUBLESHOOTING ...

Page 291: ...CHAS CHASSIS CKT CIRCUIT COMP COMPOSITION CONN CONNECTOR COV COVER CPLG COUPLING CRT CATHODE RAY TUBE DEG DEGREE DWR DRAWER ELCTRN ELECTRON ELEC ELECTRICAL ELCTLT ELECTROLYTIC ELEM ELEMENT EPL ELECTRICAL PARTS LIST EQPT EQUIPMENT EXT EXTERNAL FIL FILLISTER HEAD FLEX FLEXIBLE FLH FLAT HEAD FLTR FILTER FR FRAME or FRONT FSTNR FASTENER FT FOOT FXD FIXED GSKT GASKET HDL HANDLE HEX HEXAGON HEX HD HEXAG...

Page 292: ...SHAKEPROOF DIVISION 79807 WROUGHT WASHER MFG CO 80009 TEKTRONIX INC 82389 SWITCHCRAFT INC 83385 CENTRAL SCREW CO 89663 REESE J RAMSEY INC 93907 TEXTRON INC CAMCAR DIV 95987 WECKESSER CO INC 10 2 ...

Page 293: ... 5555 N ELSTON AVE 2530 CRESCENT DR 71 MURRAY STREET 600 18TH AVE 4444 WEST IRVING PARK RD ELGIN IL 60120 MILWAUKEE WI 53207 BEAVERTON OR 97077 CHICAGO IL 60630 BROADVIEW IL 60153 NEW YORK NY 10007 ROCKFORD IL 61101 CHICAGO IL 60641 REV MAY 1982 ...

Page 294: ...J4001 REPL TERMINAL LUG 0 391 ID LOCKING BRS CD PL EXTENSION SHAFT FOCUS W KNOB PLASTIC BUSHING SHAFT 0 15 ID X 0 3INCH OD PLSTC JACK TIP BLACK KNOB RED CAL KNOB GY 0 249 ID X0 718 X 1 765 BSHG MACH THD 0 5 32 THD X 0 39 ID KNOB RED CAL 0 082ID X 0 45 OD KNOB GY TIME DIV 0 127 ID X 0 855 KNOB CLEAR 0 252 ID X 1 2 OD X 0 383 DIAL CONTROL 10 TURN FOR 0 25 DIA SHAFT WASHER FLAT 0 39 ID X 0 562 INCH O...

Page 295: ...52 01 0310 80009 366 1031 03 80009 366 1838 01 80009 358 0640 00 80009 366 1405 08 80009 366 1840 00 80009 366 1850 00 05129 461 S 70 89663 644R 80009 333 2679 00 80009 366 2013 00 80009 348 0660 00 80009 386 4444 00 01536 OBD 01536 OBD 80009 377 0512 00 80009 129 0836 00 80009 384 1503 00 80009 384 1323 00 01536 OBD 00779 86282 2 10 3 ...

Page 296: ...NWIR SEE A11R190 R290 R395 R726 R807 REPL _72 407 2584 00 1 BRACKET GROUND FRONT PANEL BRASS ATTACHING PARTS 73 211 0304 00 2 SCREW MACHINE 4 40 X 0 312 PNH 74 343 0089 00 1 CLAMP LOOP LARGE _75 441 1535 00 1 CHASSIS SCOPE FRONT MAIN ATTACHING PARTS _76 213 0881 00 2 SCREW TAPPING 6 32 X 0 25 TYPE C 1 TRANSISTOR SEE Q938 REPL ATTACHING PARTS 211 0318 00 1 SCREW MACHINE 4 40 X 0 75 FLH 100 DEG 210 ...

Page 297: ...80009 361 1081 00 80009 407 2584 00 01536 OBD 80009 343 0089 00 80009 441 1535 00 01536 OBD 93907 OBD 83385 OBD 80009 342 0582 00 80009 343 1025 00 80009 344 0154 03 REV MAY 1982 ...

Page 298: ...REV FEB 1982 2215 OSCILLOSCOPE FIG 1 EXPLODED ...

Page 299: ...FIG 2 CRT ASSY 6 2215 OSCILLOSCOPE ...

Page 300: ...12 H A19 REV FEB 1982 ...

Page 301: ...T BOARD ASSY MAIN SEE A10 REPL ATTACHING PARTS SCREW TAPPING 6 32 X 0 437 TYPE C SCREW MACHINE 4 40 X 0 75 PNH CRT BOARD ASSY INCLUDES TERMINAL PIN SEE A10P1011 P2011 P6001 P7001 P7055 REPL RES VAR NONWIR SEE A10R883 REPL ATTACHING PARTS NUT PLAIN HEX 0 375 32 X 0 438 INCH BRS SHIELD ELEC POTENTIOMETER SPACER VAR RES 0 3 X 0 615 X0 55 HEAT SINR XSTR TO 18 AL BLACR ANODIZED HEAT SINR XSTR TO 92 TO ...

Page 302: ...3385 OBD 22526 48283 029 01536 01536 OBD OBD 73743 OBD 80009 80009 05820 13103 80009 80009 337 2945 00 361 1047 00 201 AB 2224B 337 2922 00 200 2735 00 80009 00779 343 0088 00 61134 1 01536 73743 OBD 12161 50 80009 343 0969 00 01536 83385 OBD OBD 10 5 ...

Page 303: ...009 337 2947 00 ATTACHING PARTS 73 211 0303 00 2 SCREW MACHINE 4 40 X 0 25 FLH 100 DEG 01536 OBD 74 1 COIL RF SEE L925 REPL 75 161 0033 26 B010100 B014649 1 CABLE ASSY PWR 3 18 AWG 125V 101 3 L 16428 KH 9230 161 0104 00 B014650 1 CABLE ASSY PWR 3 WIRE 98 0 LONG 16428 KH8352 131 1084 03 XB014650 1 CONN RCPT ELEC PWR MALE 250VAC 6A 82389 EAC 301 210 0586 00 XB014650 2 NUT PL ASSEM WA 4 40 X 0 25 STL...

Page 304: ......

Page 305: ...REV MAY 1982 10 7 ...

Page 306: ...175 4232 00 80009 175 4232 00 1 CA ASSY SP ELEC 2 26 AWG 4 FROM All TO R647 L R IB B O N 10 8 ADD FEB 1982 ...

Page 307: ...9 1 FUSE CARTRIDGE 3AG 2A 250V FAST BLOW 71400 AGC 2 159 0019 00 B022000 1 FUSE CARTRIDGE 3AG 1A 250V SLOW BLOW 71400 MDLl OPTIONAL ACCESSORIES 020 0672 00 1 ACCESSORY KIT 80009 020 0672 00 2 200 2520 00 1 COVER SCOPE FRONT ABS 80009 200 2520 00 3 016 0677 00 1 POUCH ACCESSORY 80009 016 0677 00 386 4674 00 1 PLATE MOUNTING ACCESSORY POUCH 80009 386 4674 00 386 2370 00 2 PLATE REINF ACCESSORY POUCH...

Page 308: ......

Page 309: ...eral sections Since the change inform ation sheets are carried in the manual until all changes are perm anently entered some duplication may occur If no such change pages appear follow ing this page your manual is correct as printed ...

Page 310: ......

Page 311: ...source voltage into the various voltages needed for instrument operation It consists of the Power Input Preregulator and Inverter circuits which drive the primary of the power transformer and other Secondary circuits which produce the necessary supply voltages for the instrument This instrument has either the Current Limit board A19 or the Preregulator board A18 installed as part of the power supp...

Page 312: ......

Page 313: ...ts base reaches approximately 6 9 V Then Q917 will be biased into its active region and the resulting collector current will cause a voltage drop across R916 This voltage drop will bias on Q915 and the positive feedback through R914 will reinforce the turn on of Q917 Thus Q915 and Q917 will drive each other into saturation very quickly Once Q915 is on U920 will begin to function Pulse width modula...

Page 314: ......

Page 315: ...ch oscillator period Q931 is used to discharge the gate drain capacitance Pin 10 of U920 goes LO reverse biasing CR931 and turning on Q931 to effectively short together the gate and source thus shutting off the FET Once the supply is running power to U920 will be supplied from the winding connected to pins 6 and 7 of T933 Diode CR913 half wave rectifies the voltage across pins 6 and 7 to keep filt...

Page 316: ...age 5 4 WARNING following part a REPLACE WITH WARNING To avoid electric shock and instrument damage when checking either the Head Room Voltage or the Preregulator Output Voltage use a digital voltmeter that is isolated from ground since the Inverter power supply circuitry common is at line potential Page 4 of 16 ...

Page 317: ......

Page 318: ... two nuts securing the shield at the back of the crt and remove the shield Page 6 13 Cathode Ray Tube procedure after step 6 ADD 6a If applicable reinstall the shield at the back of the crt then secure it with two nuts removed in step 3a Page 6 14 High Voltage Shield procedure after step 5 ADD 5a For instruments equipped with the Preregulator board A18 remove the screw from the front of the High V...

Page 319: ...ee the High Voltage Shield removal procedure 2 Remove two screws securing the Preregulator board mounting brackets one at the rear top of the frame and one on the right side near the back corner of the frame 3 Remove the securing screw through the access hole of the clear plastic shield from the top of the Preregulator board at the front right corner 4 Disconnect four wire connectors from the Prer...

Page 320: ......

Page 321: ...curing screw at the top of the Preregulator board removed in step 3 8 Reinstall the two bracket screws removed in step 2 9 Reinstall the High Voltage shield see the High Voltage Shield reinstallation procedure Page of 16 ...

Page 322: ... A18P804 A18Q915 A18Q917 A18Q931 A18Q933 A18Q935 283 0335 00 290 0770 00 281 0852 00 281 0775 00 281 0772 00 281 0820 00 281 0809 00 285 0932 00 290 0831 00 283 0208 00 152 0750 00 152 0061 00 152 0061 00 152 0661 00 276 0640 00 108 0422 00 108 0422 00 131 1048 00 131 1048 00 131 1048 00 131 1048 00 151 0164 00 151 0432 00 151 0164 00 151 1152 00 151 0506 00 Page ...

Page 323: ... 22UF 10 200V SEMICOND DVC DI RECT BRIDGE 600V 3A FAST REC SEMICOND DVC DI SW SILICON 175V 0 1 A SEMICOND DVC DI SW SILICON 175V 0 1 A SEMICOND DVC DI RECT SILICON 600V 3A FAST REC CORE EM 0 187 X 0 188 COIL RF FIXED 82 UH COIL RF FIXED 82 UH TERM QIK DISC 0 11 X 0 02 BL TERM QIK DISC 0 11 X 0 02 BL TERM QIK DISC 0 11 X 0 02 BL TERM QIK DISC 0 11 X 0 02 BL TRANSISTOR SILICON PNP TRANSISTOR SILICON...

Page 324: ...10CR904 A10CR905 A10CR906 A10CR917 A10CR931 A10CR933 315 0302 00 308 0843 00 308 0441 00 315 0121 00 315 0470 00 301 0822 00 307 0350 00 307 0350 00 120 1449 00 120 1441 00 120 1439 00 156 1627 00 152 0166 00 152 0255 00 the A10 circuit board assembly 281 0770 00 290 0188 00 290 0808 00 152 0040 00 152 0040 00 152 0040 00 152 0040 00 152 0141 00 152 0782 00 152 0782 00 Page c ...

Page 325: ...OT CORE TRANSFORMER RF MICROCKT LINEAR MOD CONTR CKT SEMICOND DVC DI ZENER 0 4W 6 2V 5 SEMICOND DVC DI ZENER 0 4W 51 V 5 CAP FXD CER DI 0 001UF 20 100V CAP FXD ELCTLT 0 1 UF 10 35V CAP FXD ELCTLT 2 7UF 10 20V SEMICOND SEMICOND SEMICOND SEMICOND SEMICOND SEMICOND SEMICOND DEVICE SILICON 600V 1 A DEVICE SILICON 600V 1 A DEVICE SILICON 600V 1 A DEVICE SILICON 600V 1 A DEVICE SILICON 30V 150MA DEVICE ...

Page 326: ...10TP920 A10TP921 120 1384 00 214 0579 02 214 0579 02 214 0579 02 A10U931 156 0885 00 A10VR913 A10VR914 A10VR915 A10VR938 152 0304 00 152 0149 00 152 0149 00 152 0788 00 ADD A10R953 A10W952 315 0203 00 176 0122 01 REMOVE F901 159 0021 00 L925 108 1096 00 ADD F901 159 0019 00 Page ...

Page 327: ...TERM TEST POINTERS CD PL MICROCIRCUIT LLOPTOELECTRONIC ISOLATOR SEMICOND DEVICE ZENER 0 4W 20V 5 SEMICOND DEVICE ZENER 0 4W 10V 5 SEMICOND DEVICE ZENER 0 4W 10V 5 SEMICOND DEVICE TRANSIENT SUPPRESSOR RES FXD CMPSN 20K OHM 5 0 25W WIRE 22 AWG BARE 12 0 V CHASSIS PARTS FUSE CARTRIDGE 3AG 2A 250V FAST BLOW COIL RF FIXED 16MH 25 FUSE CARTRIDGE 3AG 1 A 250V FAST BLOW 10 of 16 ...

Page 328: ...rnl S P C R264 V R 2 5 6 X FT266 C M C M II criO inscD C M iC M O O wo o o cd cm m m cd CD CD C vCDCM m XR878 L 8797 e R880 rm m 10 C M O Q 0 0 C D C DC O C J D CD CD C X S O X G 0825 0 3 R82T44 3 82 3 11817 X822 0 R816 X 1 R828 r827 G R 82 9 4 GGR83Q 6813 R814 3 3 C433 R882 1 0t 100 rv C D C MX x D C O C G07U42t v R433 R436L 3 m or R7g c F O6Q703 R7D6 A O OW432 3 Q708 C 7 0 B 74 4 3 R707s x R708 ...

Page 329: ... R173 2 R324 3 C340 3 C796 7 CR748 7 Q167 2 R174 2 R325 3 C345 3 C797 7 CR749 7 Q173 2 R175 2 R326 3 C350 3 C798 7 CR770 7 Q177 2 R176 2 R327 3 C357 3 C799 7 CR772 7 Q187 2 R177 2 R330 3 C358 3 C803 6 CR773 7 Q257 2 R178 2 R331 3 C360 3 C810 6 CR780 7 Q258 2 R179 2 R332 3 C366 3 C820 6 CR782 7 Q267 2 R180 2 R334 3 C367 3 C821 6 CR783 7 Q268 2 R182 2 R335 3 C368 3 C822 6 CR801 6 Q273 2 R183 2 R336 ...

Page 330: ... 4 R642 5 R835 6 U640A 4 W968 9 W 8700 3 9 R447 9 R649 10 R836 6 U640B 5 W969 7 W 8700 4 9 R448 9 R651 10 R837 6 U640 5 W975 9 W 8700 5 9 R450 9 R666 5 R839 6 U825 6 W 976 9 W 8700 6 9 R453 4 R668 5 R840 6 U835 6 W982 9 W 8700 7 9 R454 4 R670 5 R841 6 U985 9 W985 9 W 8700 8 9 R456 4 R673 10 R842 6 U990 9 W 986 9 R457 4 R674 10 R844 6 VR483 4 W1001 1 6 R458 4 R701 7 R845 6 VR644 5 W 1001 2 2 R459 4...

Page 331: ... Service Chassis mounted components have no Assembly Number prefix see end of Replaceable Electrical Parts List P8710 3 8 2 6 5 8 Figure 9 8A Circuit view of A IO Main board CIRCUIT VIEW OF A IO MAIN BOARD FIG 9 8A ...

Page 332: ...LDER BUT NOT BOTH A 1 8 PREREGULATOR B O A R D CIRCUIT NUMBER SCHEM NUMBER CIRCUIT NUMBER SCHEM NUMBER CIRCUIT NUMBER SCHEM NUMBER C903 9 L937 9 R921 9 C904 9 L938 9 R922 9 C905 9 P801 9 R923 9 C907 9 P802 9 R925 9 C908 9 P803 9 R927 9 C909 9 P804 9 R928 9 C910 9 Q915 9 R929 9 C913 9 Q917 9 R931 9 C920 9 Q931 9 R933 9 C921 9 Q933 9 R934 9 C923 9 Q935 9 R935 9 C925 9 R903 9 R936 9 C929 9 R904 9 R93...

Page 333: ......

Page 334: ...150 mV PROBE GROUND LEAD ON PIN 4 OF U920 100 mV 175 V PROBE GROUND LEAD ON PIN 4 OF U920 0 V 0 V PROBE GROUND LEAD ON PIN 4 OF U920 1 7 5 V 3 8 2 6 5 6 Cl 1 182 Page 14 of 16 ...

Page 335: ... 10 also shown on diagrams 2 3 4 5 6 7 and 10 C11 182 Page 15 of 16 DC noo ii vvsroo HI 6E R940 7F 9J W 966 3J 6F R941 7G 9J W 968 31 1J R942 7F 10J W 975 5J 1J R945 6D 10J W 976 6J 1J R946 70 10K W 982 6J 1J R947 7D 10J W 985 6J 1J R948 7E 9J W 986 6J 6J R950 6E 10K W 1001 5 8D 6J R951 7E 9J W 1001 14 8D R953 8E 9J W 1001 32 8D 51 R954 7F 9K W 4000 3 6L 91 R956 6F 9J W 4000 23 6L 91 R990 21 6H W ...

Page 336: ...7G 6G 9G 9G 4J 9G 9G 5A 6A 9A 6F 9F 9F 9F 9F 9F 6J 6J 81 81 5H 5H 5H 5H 51 51 51 51 r ...

Page 337: ...R936 5D 5B C908 2D 2D E933 4G 4B R911 IE 3C R937 5F 5B C909 IE 1C R912 2E 4D C910 IE 1C L937 5G 6C R913 2E 4D RT901 IB 5F C913 2E 4D L938 6G 6C R914 2E 5D RT902 1C 5E C920 3E 5B R916 2E 4D C921 3F 5C P801 IB 5F R917 2E 4D T901 2C 3F C923 4E 5D P802 2B 4F R920 3E 5B T907 2D 2E C925 4D 5B P803 6G 6D R921 4D 5D T933 2G 2B C929 4E 5D P804 6G 6C R922 4D 5B C932 3G 2A R923 4E 4D U920 4F 5C C933 3G 3B Q9...

Page 338: ... 00 B016700 281 0862 00 B020500 285 1250 00 B022000 000 2775 00D CAP FXD MTLZD 0 01UF 20 4000V CAP FXD MTLZD 0 01UF 20 4000V CAP FXD MTLZD 0 01UF 20 4000V MICROCIRCUIT DI QUAD 2 INP STATE W OC MICROCIRCUIT DI QUAD2 INP NAND SCHMITT MICROCIRCUIT DI QUAD2 INP NAND GATE MICROCIRCUIT DI DUAL D FLIP FLOP MICROCIRCUIT DI QUAD 2 INP NAND GATE MICROCIRCUIT DI DUAL RETRIG RESET MICROCIRCUIT DI QUAD2 INP NA...

Page 339: ...37 37 39 44 32 25 25 40 51 25 25 25 32 40 40 40 49 62 54 ...

Page 340: ...u j H u rm rj r u in fin o u r r i_ i rnvjDiL h l u u o i a uiu CHANGE C990 C995 from 0 02UF to 0 01UF C992 from 0 02UF to 0 01UF Page 2 o f 2 ...

Page 341: ...PC37 PC39 ...

Page 342: ...72 00 B025695 A12R627 315 0201 00 B021950 A13Q66A 151 0A2A 00 B025695 SEMICOND DVC DI SI 30V CAP FXD CER DI 7PF 20 100V CAP FXD CER DI 7PF 20 100V TRANSISTOR PNP SI TRANSISTOR NPN SI RES FXD CMPSN 20K 0HM 5 0 25W RES FXD CMPSN 20K 0HM 5 0 25W TRANSISTOR NPN SI TRANSISTOR NPN SI REX FXD CMPSN 5 6 OHM 5 0 25W CAP FXD ELCTLT 2 2UF 20 20V CAP FXD CER DI 1800PF 10 100V RES FXD CMPSN A 7K 0HM 5 0 25W RE...

Page 343: ...66 66 66 64 64 64 64 66 66 77 66 66 66 66 66 66 56 70 ...

Page 344: ...cation 4B to an 1800 pF capacitor REMOVE CR626 CR630 ADD C619 Q626 CHANGE R619 R623 see partial schematic DIAGRAM TIMING SWITCH CHANGE R627 Location 7C to a 200fi resistor DIAGRAM ALTERNATE B SWEEP REMOVE CR676 CR680 ADD C674 0676 CHANGE R673 R674 see partial schematic Page 2 of 2 A 1 3 ...

Page 345: ......

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