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Tektronix 371B, Service Manual

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Maintenance

4-6

371B Service Manual

Check Associated Equipment.

Before proceeding with troubleshooting, check that

the equipment used with this instrument is operating correctly. Make sure that
the input signals are properly connected and that the interconnecting cables are
not defective. Also check the line-voltage source.

Visual Check.

Visually check the portion of the instrument where the trouble is

located. Many troubles can be found by visible indications such as unsoldered
connections, loose cable connections, broken wires, damaged circuit boards,and
damaged components.

Check Instrument Adjustment.

Check the overall electrical adjustment of this

instrument or of the affected circuit if the trouble appears in one circuit. The
apparent trouble may only be a result of misadjustment. Complete adjustment
instructions are given in Chapter 5: Performance Check and Adjustment.

Isolate Trouble to a Circuit.

Note the trouble symptom. The symptom often

identifies the circuit in which the trouble is located. When trouble symptoms
appear in more than one circuit, check the affected circuits by taking voltage and
waveform measurements.

Incorrect operation of all circuits often indicates trouble in the power supply.
Check first the correct voltage of the individual supplies. However, a defective
component elsewhere in the instrument can appear as a power-supply trouble and
may also affect the operation of other circuits

The 371B Troubleshooting charts in the Chapter 8: Diagram and Circuit Board
Illustrations, provides a guide for locating defective circuits. Start at the top of
the chart and perform the checks until one of the checks fails.

Check Voltages.

Often the defective component can be located by checking for

the correct voltages in the circuit. Typical voltages are given in Chapter 8:
Diagrams and Circuit Board Illustrations.

. Voltages provided in Chapter 8: Diagrams and Circuit Board Illustra-

tions, are not absolute and may vary slightly between 371B instruments. To
obtain operating conditions used to take these readings, see the “Voltage
Conditions” adjacent to the schematic diagram.

Summary of Contents for 371B

Page 1: ...er 070 A843 50 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety su...

Page 2: ...patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Japan Ltd 5 9 31 Kitashina...

Page 3: ...s This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this war...

Page 4: ......

Page 5: ...ormation 2 1 Product Description 2 1 Related Manuals 2 2 Measurement Concepts 2 4 Installation 2 5 Rackmounting Information 2 11 Repacking for Shipment 2 17 Theory of Operation Theory of Operation 3 1...

Page 6: ...edures 5 9 Power Supply 5 11 Display 5 18 Measurement Accuracy 5 37 Step Generator 5 54 Collector Supply 5 101 Test Fixture 5 113 Reconfigure the 371B 5 117 Options Options and Accessories 6 1 Options...

Page 7: ...accuracy 5 48 Figure 5 5 Calibration Fixture setup for checking collector current measurement accuracy in high voltage mode 5 50 Figure 5 6 Calibrating CURSOR readout for checking accuracy of collect...

Page 8: ...ccuracy 5 94 Figure 5 23 Setup for determining cursor measurement variation 5 96 Figure 5 24 Setup for measuring maximum pulse amplitude accuracy 5 97 Figure 5 25 Setup for checking ripple and pulse n...

Page 9: ...15 Table 2 1 Line voltage ranges 2 6 Table 2 2 Power cord identification 2 8 Table 4 1 Default and Extended Power up Routines 4 7 Table 4 2 Power up System Error Messages 4 9 Table 4 3 Front Panel Con...

Page 10: ...Maximum Voltage Accuracy 5 80 Table 5 16 Offset Accuracy 5 83 Table 5 17 Current Amplitude Accuracy 5 88 Table 5 18 Minimum Output Current 5 110 Table 5 19 Maximum Peak Voltage 5 112 Table 6 1 Standa...

Page 11: ...uct is properly grounded Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before ma...

Page 12: ...ractices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read t...

Page 13: ...ess another person capable of rendering first aid and resuscitation is present Disconnect Power To avoid electric shock disconnect the mains power by means of the power cord or if provided the power s...

Page 14: ...Service Safety Summary 371B Service Manual...

Page 15: ...perating instructions Theory of Operation contains circuit descriptions that support service to the module level Performance Verification contains procedures for confirming that the 371B Programmable...

Page 16: ...le component assembly or part of the 371B Programmable High Power Curve Tracer is referred to generically as a module In general a module is an assembly like a circuit board rather than a component li...

Page 17: ...1 800 833 9200 select option 1 Service support 1 800 833 9200 select option 2 Technical support Email techsupport tektronix com 1 800 833 9200 select option 3 1 503 627 2400 6 00 a m 5 00 p m Pacific...

Page 18: ...Preface 371B Service Manual...

Page 19: ...ddition performance check is recommended after module replacement If the analyzer does not meet performance criteria repair is necessary Strategy for Servicing Throughout this manual the term module r...

Page 20: ...t for one year from date of purchase The warranty appears on the back of the title page in this manual Tektronix technicians provide warranty service at most Tektronix service locations The Tektronix...

Page 21: ...Specifications...

Page 22: ......

Page 23: ...aracteristic curves and setups can be recalled for additional analysis and comparison The 371B provides direct readout on the CRT of offset base gate voltage or current The 371B calculates these value...

Page 24: ...Product Overview 371B Service Manual...

Page 25: ...at the maximum power condition continuous setting should be limited Intermittent use at above condition is 4 min Operating 11 min Non operating Table 1 1 Collector Supply Electrical Specification Cha...

Page 26: ...ollector supply 300 W range 30 V 10 5 Pulsed collector supply 30 W range 3 kV 10 0 Rectified sine wave collector supply 3 W range 3 kV 10 0 Rectified sine wave collector supply 300 mW range 300 V 15 0...

Page 27: ...UPPLY at Open circuit Overshoot Undershoot Typical Less than 5 of total output More than 5 of VARIABLE COLLECTOR SUPPLY at Open circuit Table 1 2 Step Generator Characteristics Performance Requirement...

Page 28: ...p amplitude except 10 times STEP OFFSET AMPLITUDE when control is set to 2 A per step Maximum Voltage 12 V 30 30 Accuracy At least 5 V Ripple plus Noise Within 1 of STEP AMPLITUDE 10 nA Check by Oscil...

Page 29: ...ove is given as Tdut T0 1 Rdut Rsense where Tdut is the time constants for DUT with Rdut resistance and T0 is the time constants for the DUT with zero resistance The Current sense resistors are listed...

Page 30: ...in a 1 2 5 sequence 30 W 3 W peak power watts 50 V div to 500 V div in a 1 2 5 sequence 300 mW 30 mW peak power watts 5 V div to 50 V div in a 1 2 5 sequence Step Generator Volts Vbe Range 100 mV div...

Page 31: ...nality 90 _ Within 0 6 _ Trace Rotation At least 3 _ Readout On screen display VERT div Collector Supply Current deflection factor Ic div Peak Power Watts 3 kW 1 A div to 50 A div 300 W 500 mA div to...

Page 32: ...on from power source with its natural at or near ground earth potential It is not intended for two phase of multi phase system or across legs of single phase three wire system It is provided with a th...

Page 33: ...urned off for at least 30 s Table 1 11 Cooling Clearance Characteristic Description Clearance Top and Bottom 0 cm Side 5 cm 2 in Rear 5 cm 2 in Table 1 12 Environmental Specification Characteristic De...

Page 34: ...ock non operating 196 m s2 20 G half sine 11 ms duration Three shocks per axis in each direction 18 shocks total Bench handling Operating Drop from 10 cm 4 in tilt or 45 _ which ever less Tilt not to...

Page 35: ...this test EN 61000 4 4 Electrical Fast Transient Burst Immunity Note This test may cause the oscillation of EUT EN 61000 4 5 Surge Immunity EN 61000 4 6 Conducted Disturbance induced by RF Field Immun...

Page 36: ...nt inside a product is considered to be the same as the external Products should be used only in the environment for which they are rated Pollution Degree 1 No pollution or only dry nonconductive poll...

Page 37: ...u n p 0 1 9 u is recognized as micro Accessible with the Position Control buttons Maximum text strings 24 characters Character size Approximately 3 mm height 2 mm width Interface Characteristics GPIB...

Page 38: ...Specifications 371B Service Manual...

Page 39: ...General Information...

Page 40: ......

Page 41: ...ent pulses up to 400 A or a sine square high vole waveform up to 3 kV The high current pulses enable dynamic testing of high power devices while keeping the internal heating of these devices to a mini...

Page 42: ...rement application The 371B consists of two large components a main unit and a test fixture unit The main unit contains front and rear panel controls indicators and connectors a display CRT and the co...

Page 43: ...nel using patch cords with clips In such cases the adapter panel may have to be removed The test fixture connects to the main unit using the interconnect cable and connector The top row of connectors...

Page 44: ...re analysis Incoming inspection of semiconductors Comparison of semiconductor device characteristics Semiconductor manufacturing output Figure 2 1 helps to illustrate 371B measurement concepts A colle...

Page 45: ...grammable High Power Curve Tracer weighs approxi mately 36 kg 80 lb It requires two people to lift the instrument out of its shipping carton Work carefully to avoid injury due to improper lifting The...

Page 46: ...r near ground earth potential It is not intended for operation from two phases of a multi phase system nor across legs of a single phase three wire system This instrument can be operated from either a...

Page 47: ...l of the 371B before connecting the instrument to a line voltage source Also check to ensure that the proper line fuses are installed for the main and collector power supplies If the LINE VOLTAGE INDI...

Page 48: ...General Information 2 8 371B Service Manual Table 2 2 Power cord identification Plug configuration Normal usage Option number...

Page 49: ...ric shock hazard Refer to Table 2 2 if a power cord other than the one supplied is required The 371B can be operated where the ambient temperature is between 10_C and 40_C After storage at temperature...

Page 50: ...in cooling airflow The 371B can be operated where the ambient temperature is between 10 _C and 40 _C and stored in ambient temperatures from 20 _C to 60 _C After storage at temperatures outside the op...

Page 51: ...rilled for screw fasteners see Figure 2 3 Figure 2 3 Location of the Rackmount Latch Release The 371B fits most commercial consoles and 19 inch racks with rail holes that conform to universal spacing...

Page 52: ...cooling air and to provide cable clearance The depth of the 371B from behind the rack ears to the rear panel is 480mm 18 9 in The rack depth must be at least 559mm 22 in see Figure 2 5 to meet the rea...

Page 53: ...nary track section mounts in front of the rail Use bar nuts behind untapped front rails The front lip of the stationary track section must mount in front of the front rail to allow the 371B spring lat...

Page 54: ...following 1 Select the appropriate holes in the rack rail using Figure 2 4 as a guide 2 Mount the stationary track sections to the front rack rails with truss head screws and bar nuts if necessary 3...

Page 55: ...pull the instrument out 7 Once the instrument is out of the rack press the latch release and push the instrument back into the rack To convert the 371B rackmount version to a cabinet model use the fo...

Page 56: ...bracket from each comer on the rear panel 2 Replace the side panels with rackmount version side panels 3 Attach brackets at each comer on the rear panel 4 Remove both carrying handle assemblies a Rem...

Page 57: ...d instrument serial number Description of the service requested If the original packaging is unfit for use or not available package the instrument as follows 1 Obtain a corrugated cardboard shipping c...

Page 58: ...General Information 371B Service Manual...

Page 59: ...Theory of Operation...

Page 60: ......

Page 61: ...of the 371B The numbers enclosed in diamonds within each block in Figure 3 1 indicate the schematic diagrams associated with the block The 371B is a static high power semiconductor tester that display...

Page 62: ...Theory of Operation 3 2 371B Service Manual Figure 3 1 371B Block Diagram...

Page 63: ...erator generates two types of signals a sine square waveform generated from the clock signal received from the PLL and clock circuit and a DC signal These signals are output at an amplitude selected b...

Page 64: ...mode the display select circuit selects the signal from the display offset circuit and sends it to the CRT output circuit In store mode the signal from the display D A converter circuit is selected an...

Page 65: ...ltages required by the main power supply circuit collector power supply circuit and high current power supply circuit The main power supply circuit supplies low voltage operating power to the circuits...

Page 66: ...e referred to as low The specific voltages that constitute a high or low state vary between different families of electronic devices e g ECL CMOS and TTL logic Active low signals are indicated by an L...

Page 67: ...tage mode and DC signal which is the source of the collector signal in high current mode The acquisition circuitry located on the A3 A D board consists of an S H sample and hold and select circuit A D...

Page 68: ...play Control board This circuitry consists of the signal select logic circuit unblank Z select circuit and the horizontal vertical preamp circuit This block of circuitry selects and amplifies the sour...

Page 69: ...e collector supply interface and high voltage output controls the collector supply output step generator output and collector supply output relays by means of an interlock The main key circuitry is lo...

Page 70: ...e high voltage generator circuit the high voltage regulator circuit the grid bias and DC restorer circuit the focus amplifier and DC restorer circuit the anode multiplier circuit the rectifier filter...

Page 71: ...Maintenance...

Page 72: ......

Page 73: ...nt is operated with the covers removed do not touch exposed connections or components Some transistors have voltages present on the case Disconnect power before cleaning the instrument or replacing pa...

Page 74: ...ohol Cleaning the interior of the instrument should only be necessary occasionally The best way to clean the interior is to blow off the accumulated dust with dry low velocity air approximately 5 lbs...

Page 75: ...bleshooting The following information is provided to facilitate troubleshooting the 371B Troubleshooting aids Troubleshooting equipment Troubleshooting techniques Diagnostics Information contained in...

Page 76: ...rocedure the Adjustment and Test Point Locations pullout pages appear in Chapter 8 Diagrams and Circuit Board Illustrations The following equipment is useful for troubleshooting the 371B 1 Transistor...

Page 77: ...ion and operation of associated equipment If the trouble is not located by these checks the remaining steps aid in locating the defective component Power Up Diagnostics When the 371B is powered on it...

Page 78: ...en identifies the circuit in which the trouble is located When trouble symptoms appear in more than one circuit check the affected circuits by taking voltage and waveform measurements Incorrect operat...

Page 79: ...sts Five tests are run automatically each time the 371B is powered up Two additional extended tests can be run by pressing the cursor SHIFT button and then powering up the instrument These tests are l...

Page 80: ...found such as a shorted bus the memory location LED blinks 0 and 2 alternately and the 371B does not advance to the next routine Flash ROM Check The 371B checks the Flash ROM by checksum When a Flash...

Page 81: ...ain a visual indication that the LEDs are operating When all LEDs have been lit in sequence the 371B diagnostic software advances to the display quality check Be sure to turn the NON STORE STORE VIEW...

Page 82: ...k test It does not check the functionality of the push buttons If an error is found the error message is displayed at the bottom of the CRT The error message is in the following format STRING KEY ERRO...

Page 83: ...ontrol Message Display SAVE SAVE Display RECALL RECALL MEMORY up MEMORY up MEMORY down MEMORY down Display NON STORE NON STORE Display STORE STORE Display REF REF Display VIEW VIEW Display ENTER ENTER...

Page 84: ...0 16 VARIABLE COLLECTOR SUPPLY VARIABLE XX 0 25 HIGH CURRENT OUTPUT ON H C ENABLED HIGH CURRENT OUTPUT OFF H C DISABLED HIGH VOLTAGE OUTPUT ON H V ENABLED HIGH VOLTAGE OUTPUT OFF H V DISABLED INTERLO...

Page 85: ...many types of connectors some of them are very similar in appearance Tag each connector for identification before removing it from its respective board This will greatly aid reassembly Some connector...

Page 86: ...val beginning with Step 4 Rear Panel For most disassembly assembly purposes the rear panel does not have to be completely removed from the main unit Simply open the rear panel as described in Steps 1...

Page 87: ...ations shows the location of related electrical assemblies Refer to the Drawer Unit and Front Porch drawings in Chapter 9 Mechanical Parts for location of related chassis mounted sub assem blies and c...

Page 88: ...ace circuit board as follows 1 Pull out the drawer unit from the main body of the 371B 2 Remove the connector for J100 from the A13 Key Interface circuit board 3 Remove the connector through the W200...

Page 89: ...he cabling between the Front Porch and other drawer unit assemblies 4 Install the Front Porch assembly in the reverse order of removal A30 Connector Board The A30 Connector board is fastened to the un...

Page 90: ...Porch away from the drawer unit slightly to access the A31 Relay board 4 Remove J914 and J695 from the A31 Relay board 5 Remove the eight screws that secure wires to J920 J921 J924 J926 J928 J932 and...

Page 91: ...owing to access and remove these transistors 1 Remove the drawer unit from the 371B 2 Remove the shield four screws that covers the A31 Relay board and the A15 High Current Control board 3 Remove the...

Page 92: ...arge Before removing the CRT the anode must be fully discharged by shorting the CRT anode to the chassis Wait at least 10 minutes and again firmly short the anode to the chassis then proceed with the...

Page 93: ...ase into the CRT clamp ring located at the rear of the CRT shield 4 Clean the CRT faceplate and place the A28 and A29 lamp board assemblies on the right and left side of the CRT respectively Place the...

Page 94: ...rs on the A1 Mother board c Push the plug in card down into the bus slot connectors of the A1 Mother board Press firmly on the board but do not press on compo nents 5 Replace the two circuit board ret...

Page 95: ...pon reassembly make sure that all four insulation washers are placed in position Without these insulator destructive electric short circuits will occur Do not apply silicon grease to the insulation wa...

Page 96: ...y board to the A12 Sub Key board The A11 Main Key board and A12 Sub Key board are connected by circuit board connectors J100 P100 and J120 P120 Be careful not to damage the connectors when removing an...

Page 97: ...the CRT anode cap from the jack located on the left side of the CRT Ground the CRT anode cap to the chassis to discharge any stored charge 5 Remove J182 J194 and J200 from the A20 H V Regulator board...

Page 98: ...y 1 Remove the top right and rear side panels 2 Remove J64 J260 and J262 from the A26 Collector Power Supply assembly 3 Remove J276 from the A27 Primary board 4 Remove the four screws that secure the...

Page 99: ...Replace the A28 and A29 Graticule Illumination Lamp boards in the reverse order of removal Low Voltage Power Supply Transformer The Low Voltage Power Supply transformer is located under the A25 Main P...

Page 100: ...on the fan is pointing toward the inside of the 371B 4 Remove the four screws and nuts that secure the Cooling Fan to the rear panel Lift the Cooling Fan fan cover filter and fan guard from the rear...

Page 101: ...Performance Verification...

Page 102: ......

Page 103: ...hat you thoroughly inspect and clean the 371B as instructed in Chapter 4 Maintenance of this manual Check the performance of this instrument at an ambient temperature between 10_C and 40_C unless othe...

Page 104: ...talog for compatible equip ment e g TDS3032B DC Voltage Source Voltage range 0 mV to 1000 V Accuracy 0 1 mV Resolution 0 1 mV Supplies a reference voltage to the 371B Fluke 5101B DC Current Source Cur...

Page 105: ...tronix A1002 or A1003 The checks and adjustment procedures are based on the first item of equipment given as an example When other equipment is substituted control settings or setups may have to be al...

Page 106: ...re alternative Table 5 2 Performance Check and Adjustment Alternatives Task Procedure Options Performance Check Checking key electrical specifica tions Perform the 371B Setup and Initialization proced...

Page 107: ...ng or Adjusting in the procedure title Performance Check Summary Table 5 3 lists key characteristics checked in this chapter and the order in which they are checked Also listed are procedures containi...

Page 108: ...Collector Current Voltage Measure ment in High Current Mode C7 Step Generator Multi 1X Balance and Offset D1 Voltage Balance D2 Gain Voltage D3 Current Zero and Balance D4 Gain Current D5 Rate and Pul...

Page 109: ...oved due to the line voltage high voltage and high current levels present 3 Connect the 371B to a suitable power source 4 Press the POWER button and allow at least 20 minutes warm up before proceeding...

Page 110: ...with the memory location set to location 1 2 Check that the SET 1 message is displayed DISPLAY Mode STORE VERTICAL 1 A DIV HORIZONTAL 1 V DIV INVERT Off STEP GENERATOR SOURCE CURRENT NUMBER OF STEPS 2...

Page 111: ...hese words Checking indicates that an electrical characteristic is checked Adjusting indicates that instructions are given to make one or more internal adjustments Examining indicates that a functiona...

Page 112: ...1B Service Manual Parts of Procedure Each procedure is composed of sequentially numbered steps Functional headings such as Examining CRT Bias and Adjusting CRT Bias are provided to help identify steps...

Page 113: ...stics examined in this step are examples of typical instrument operation they are not specifications Equipment Setup 371B To 371B Ground Jack 371B To 371B Ground Jack 371B Settings Initialize the 371B...

Page 114: ...V test point and each of the other power supply test points listed in Table 5 4 for voltage levels within the given deviation Examining Ripple 3 Disconnect the digital multimeter and connect the test...

Page 115: ...Adjustment Locations Pullout 3 in Chapter 8 for the location of test points for this step Checking the 2 V Reference 1 CHECK for digital multimeter reading of 1 999 V to 2 001 V If not within these l...

Page 116: ...s See Test Point and Adjustment Locations Pullout 3 in Chapter 8 for the location of test points for this step Checking the 2 V Reference 1 CHECK for digital multimeter reading of 1 999 V to 2 001 V I...

Page 117: ...uency of line power supply is 60 Hz adjust R104 PLL FREQ 1 adjustment on the A3 A D board for a digital multimeter readout of 3 0 0 1 V 4 Connect the Digital Multimeter test leads to A GND test point...

Page 118: ...for the location of test points for this step Removing the High Voltage Shield To avoid electric shock hazard be certain the 371B POWER switch is set to OFF before removing or replacing the high volt...

Page 119: ...for a reading of 2304 V to 2496 V Disconnecting the Meter 5 Change the following 371B setting To avoid electric shock hazard be certain the 371B POWER switch is set to OFF before disconnecting the dig...

Page 120: ...t operation they are not specifications Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B Settings Test Equipment Settings See Test Point a...

Page 121: ...ding down the SHIFT button 4 EXAMINE the digital multimeter for reading between 0 995 V and 1 005 V 5 Disconnect the digital multimeter positive lead from TP658 Examining Vertical CAL FULL 6 Connect t...

Page 122: ...adjustment of R210 they are not specifica tions Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B Settings 1 While pressing the cursor SHIF...

Page 123: ...BIAS adjustment R210 on the A20 H V Regulator board until the CRT spot is barely visible Removing the Setup 4 Change the following 371B settings The frame test pattern is also used in procedure B3 Ex...

Page 124: ...ssing the cursor SHIFT button set the 371B POWER switch to ON This displays the Frame Test Pattern on the CRT Examining Astigmatism 2 Change the following 371B settings INTENSITY NON STORE STORE VIEW...

Page 125: ...EXAMINE the CRT for the frame test pattern to be similarly in focused If the frame test pattern is not similarly focusing the following adjustment may be necessary 7 READJUST ASTIG adjustment R420 on...

Page 126: ...crease in spot brightness when the NON STORE STORE VIEW INTENSITY control is turned from full counterclockwise to full clockwise Examining VIEW 3 Press the ENTER button to store the displayed trace sp...

Page 127: ...ange the following 371B setting 9 CHECK that the NON STORE LED is lit 10 EXAMINE the CRT for a continuous increase in spot brightness as the NON STORE STORE VIEW INTENSITY control is turned from fully...

Page 128: ...as shown in the following illustration and set controls as described 371B Settings 1 Press the REF button 2 CHECK that the REF LED is lit 3 Change the following 371B setting 4 EXAMINE the CRT for a co...

Page 129: ...t controls as described 371B 371B Settings Initialize the 371B then set the following control as indicated CURSOR Mode WINDOW 1 Examine the display for a continuous increase in readout and brightness...

Page 130: ...DOT DISPLAY Mode CAL ZERO CAL ZERO is initiated by pressing the VIEW button while holding down the cursor SHIFT button Determining if Adjustment is Necessary 1 EXAMINE the vertical CURSOR readout for...

Page 131: ...er left to the upper right corner of the CRT 5 Repeat Steps 1 and 2 6 Change the following 371B settings Cal full mode is initiated by pressing the STORE button while holding the cursor SHIFT button E...

Page 132: ...Adjusting Store Gain See Test Point Adjustment Locations 1 in Chapter 8 for the location of adjustments performed in this procedure 12 ADJUST STORE GAIN adjustment R622 on the A3 A D board so that th...

Page 133: ...he following illustration and set controls as described 371B Settings See Test Point and Adjustment Location Pullouts 1 and 2 in Chapter 8 for the location of adjustments associated with this procedur...

Page 134: ...UT CURSOR INTENSITY control and set the dot test pattern slightly brighter using the intensity NON STORE STORE VIEW INTENSITY control Examining Store Position 4 EXAMINE the display to determine whethe...

Page 135: ...f the frame test pattern D A Gain adjusts the size of the frame test pattern without changing the dot test pattern size Checking and Adjusting the Display The dot frame test patterns are visual aids f...

Page 136: ...re positioned within the inner and outer frame patterns If the positioning is not correct the following adjustment is necessary Adjusting X Gain and Y Gain 12 ADJUST X GAIN adjustment R554 and Y GAIN...

Page 137: ...n Removing the Test Pattern 18 Press the cursor SHIFT button to exit the diagnostic routine The characteristics in this procedure are examples of typical instrument operation they are not specificatio...

Page 138: ...T TAN ZERO adjustment R462 on the A10 Sense board to align the trace with the horizontal graticule line 4 Change the following 371B setting COLLECTOR SUPPLY VARI ABLE 0 0 LOOPING COMPENSATION Fully cl...

Page 139: ...IZON TAL VOLTS DIV setting 100 mV DIV setting accuracy is 5 0 of READOUT plus 20 mV Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B TO A5...

Page 140: ...n to the next procedure When you want to set the PEAK POWER WATTS to 300 mW or 30 mW simultaneously press the cursor SHIFT button and the 300 mW or 30 mW button The indicator to the left of HIGH or LO...

Page 141: ...ital multimeter from TP 60 HO to TP 658 HD 5 ADJUST X MAG R655 on the A5 Display Control board to minimize the deviation from 1 000 V for NPN mode and from 1 000 V for PNP mode while switching COLLECT...

Page 142: ...S 30 mW DISPLAY VERTICAL 1 mA DIV CURSOR Mode DOT Test Equipment Settings Mode DC VOLTAGE When you want to set the PEAK POWER WATTS to 300 mW or 30 mW simultaneously press the cursor SHIFT button and...

Page 143: ...rom 100 mV for PNP mode while switching COLLECTOR SUPPLY POLARITY Table 5 6 Vertical Zero Limits PEAK POWER WATTS Setting VERTICAL setting VERTICAL CURSOR Readout m m m m m m 4 Change the positive lea...

Page 144: ...Performance Verification 5 42 371B Service Manual Rechecking After Adjustment 8 Change the following 371B settings 9 Repeat Step 1...

Page 145: ...371B 2 Remove the connector at J76 on the A7 Step Generator board 3 Turn on the 371B and configure as shown in the setup illustration below 371B Settings Test Equipment Settings Leave the Protective C...

Page 146: ...EN 7 Set HORIZONTAL to 200 mV DIV STEP GEN 8 Repeat Step 6 this time setting the voltage source to the non zero value shown in table 5 7 for each setting of HORIZONTAL VOLTS DIV STEPGEN 9 CHECK that t...

Page 147: ...V DIV setting accuracy is 5 0 of READOUT plus 20 mV Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B 371B Settings Initialize the 371B the...

Page 148: ...g two long patch cords a shown in Figure 5 3 2 CHECK that the horizontal CURSOR readout is within the limits shown in Table 5 8 at each setting of HORIZONTAL VOLTS DIV COLLECTOR with changing each Vol...

Page 149: ...ttings Initialize the 371B then set the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 mW DISPLAY HORIZONTAL 10 mV DIV COLLECTOR CURSOR Mode DOT Test Equipment Settings VOLTAGE SO...

Page 150: ...ENABLED 4 Close the protective cover 5 CHECK that the horizontal CURSOR readout is within the limits shown in Table 5 9 for each setting of the peak power watts controls HORIZONTAL VOLTS DIV COLLECTO...

Page 151: ...ations Cursor accuracy is less than 1 5 of READOUT plus 10 of HORIZON TAL VOLTS DIV setting Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 37...

Page 152: ...mW and the VERTICAL VOLTS DIV control to 1 mA DIV 3 Connect the current source between the COLLECTOR SUPPLY HIGH VOLTAGE and the COMMON terminals on the Calibration Fixture by using two long patch cor...

Page 153: ...to 46 17 mA Specifications Cursor accuracy is less than 1 5 of READOUT plus 10 of HORIZON TAL VOLTS DIV setting Equipment Setup Set up the equipment as shown in the following illustration and set cont...

Page 154: ...Calibration Fixture and the voltage source as shown in Figure 5 6 2 Set the voltage source to 4 500 V and note the reading of the horizontal CURSOR readout 3 Set the voltage source output to 0 V and...

Page 155: ...aches 4 5 Volt 8 CHECK that the vertical CURSOR readout is within a reading specified in Table 5 11 9 Set the HIGH CURRENT breaker to DISABLED 10 Remove the patch cords from the Calibration Fixture 11...

Page 156: ...ey are not specifications Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B 371B Settings Initialize the 371B then set the following contro...

Page 157: ...utton will be lit 3 EXAMINE the digital multimeter for a reading of 0 mV 1 mV when STEP OFFSET AMPLITUDE is set to 100 mV 200 mV and 500 mV If the digital multimeter reading is within the given limits...

Page 158: ...p Generator SG Offset See Test Point and Adjustment Locations Pullout 7 in Chapter 8 for the location of adjustments R560 8 Protective Cover remains closed 9 ADJUST SG OFFSET adjusting R560 on the A3...

Page 159: ...e the 371B then set the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY Mode NON STORE Horizontal 100 mV DIV STEP GEN STEP GENERATOR NUMBER OF STEPS 0 SOURCE VOLTAGE STEP...

Page 160: ...is set back and forth between 500 mV and 1 V Changing the Setup 2 Change the following 371B settings DISPLAY Mode STORE STEP GENERATOR STEP OFFSET AMPLI TUDE 200 mV CURSOR Mode DOT 3 Connect the DC v...

Page 161: ...r the horizontal CURSOR value noted in Step 5 8 mV Adjusting for Interaction 8 Change the following test equipment 9 Repeat Steps 5 through 8 to determine if further adjustment is necessary Removing t...

Page 162: ...the following 371B setting POWER ON Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B 371B Settings Change the following control as indica...

Page 163: ...for adjusting Step Generator Gain 5 Close the protective cover Adjusting Step Generator Gain 6 Press the REPEAT button several times to move the spot 10 divisions to the right See Test Point and Adju...

Page 164: ...e Verification 5 62 371B Service Manual 9 Change the position of jumper J340 on the A3 A D board to the Zero position 10 Change the following 371B setting Removing the Setup 11 Disconnect the digital...

Page 165: ...Initialize the 371B then set the following control as indicated DISPLAY Mode NON STORE Horizontal 100 mV DIV STEP GEN STEP GENERATOR NUMBER OF STEPS 0 STEP OFFSET AMPLITUDE 1 A Connecting the Patch Co...

Page 166: ...1 A STEP and 500 mA STEP Correcting for Unsatisfactory Adjustment Repeat procedures D1 through D2 if R322 cannot be satisfactorily adjusted Adjusting Negative Current Balance 4 Change the following 37...

Page 167: ...DISPLAY Horizontal 1 V DIV STEP GEN STEP GENERATOR NUMBER OF STEPS 0 STEP OFFSET AMPLITUDE 1 mA OFFSET 5 mA Test Equipment Settings DIGITAL MULTIMETER Mode DC CURRENT Connecting the Patch Cords 1 Con...

Page 168: ...s reading will be used in Step 9 7 Disconnect the shorting bar 8 Close the protective cover Adjusting Loop Gain See Test Point and Adjustment Locations Pullout 2 in Chapter 8 for the location of adjus...

Page 169: ...controls as described 371B 371B Settings Initialize the 371B then set the following control as indicated STEP GENERATOR NUMBER OF STEPS 1 Test Equipment Settings TEST OSCILLOSCOPE COUPLING DC VERTICAL...

Page 170: ...DC coupling 6 Set the test oscilloscope time division to 50 ms division 7 CHECK that the pulse width is 450 ms to 550 ms at half amplitude and overshoot or undershoot is within 10 of full amplitude 8...

Page 171: ...pment as shown in the following illustration and set controls as described 371B Settings Test Equipment Settings 1 Connecting the X1 probe tip from the test oscilloscope to the STEP GENERATOR VOLTAGE...

Page 172: ...is within 2 of total output 3 of Step Amplitude 2 mV Less than 2 variation between step amplitudes With STEP MULTI 1X on each step is within 4 of total output 5 of step AMPLITUDE 2 mV With STEP MULTI...

Page 173: ...ettings Change the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY Mode NON STORE Horizontal 2 V DIV STEP GEN STEP GENERATOR NUMBER OF STEPS 10 SOURCE VOLTAGE STEP OFFSET...

Page 174: ...ue specified in the next STEP of Table 5 12 Note the reading for use in Step 10 10 CHECK that the voltage difference between adjacent steps is within 2000 mV 40 mV 11 Repeat Steps 8 to 10 for each STE...

Page 175: ...0mV 19 Set the STEP MULTI 1X control to on and the horizontal sensitivity to 200 mV DIV STEP GEN 20 Repeat Steps 6 through 18 using Table 5 13 instead of Table 5 12 21 Proceed to the Setup Conditions...

Page 176: ...is 200 mV 10 mV Specifications Each step is within 2 of total output 3 of Step Amplitude 2 mV 1 Change the following 371B setting 2 Change the position of jumper J340 from ZERO to CAL on the A3 A D bo...

Page 177: ...owing control as indicated POWER ON COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY Mode NON STORE Horizontal 200 mV DIV STEP GEN STEP GENERATOR NUMBER OF STEPS 10 SOURCE VOLTAGE STEP OFFSET AMPLITUDE...

Page 178: ...for each STEP OFFSET AMPLITUDE setting from 200 mV to 1 V 7 Press the step generator INVERT button to turn invert on 8 CHECK that the digital multiplier reading is within the range specified in Table...

Page 179: ...AMPLITUDE 2 mV Maximum Voltage is 20 times of Step AMPLITUDE except 5 V of Step AMPLITUDE Maximum Voltage is 10 times of Step AMPLITUDE with the setting 5 V of Step AMPLITUDE 1 Change the following 3...

Page 180: ...following control as indicated POWER ON COLLECTOR SUPPLY PEAK POWER WATTS 30 W DISPLAY Mode NON STORE Horizontal 1 V DIV STEP GEN STEP GENERATOR NUMBER OF STEPS 10 SOURCE VOLTAGE STEP OFFSET AMPLITUD...

Page 181: ...the spot moves to the right most vertical graticule line and set the STEP OFFSET AMPLITUDE to 200 mV 6 CHECK that the digital multimeter reading is within the range specified in Table 5 15 for each ST...

Page 182: ...ight most vertical graticule line 11 CHECK that the digital multimeter reading is within the specified in Table 5 16 for 5 V STEP OFFSET AMPLITUDE 12 Press the STEP GENERATOR INVERT button and repeat...

Page 183: ...tep AMPLITUDE Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B 371B Settings Initialize the 371B then set the following control as indicat...

Page 184: ...3 CHECK the digital multimeter reading is within the limit shown in the 0 of OFFSET column in Table 5 16 for each setting of STEP OFFSET AMPLITUDE from 200 mV to 5 V 4 Press the step generator INVERT...

Page 185: ...e following 371B settings 9 Repeat Step 7 10 Remove the patch cords from the STEP GENERATOR VOLTAGE OUTPUT and the COMMON terminals 11 Initialize the 371B Table 5 16 Offset Accuracy STEP OFFSET AMPLIT...

Page 186: ...371B 371B Settings Initialize the 371B then set the following control as indicated STEP GENERATOR NUMBER OF STEPS 0 SOURCE VOLTAGE STEP OFFSET AMPLITUDE 200 mV OFFSET 2000 mV Test Equipment Settings D...

Page 187: ...generator INVERT button to change step generator polarity 5 CHECK that the digital multimeter reading is between 80 mA and 150 mA then disconnect the digital multimeter 6 Initialize the 371B Specific...

Page 188: ...POWER ON 371B Settings Change the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 3 W DISPLAY Mode NON STORE VERTICAL 10 mA DIV STEP GENERATOR INVERT ON NUMBER OF STEPS 10 SOURCE CURR...

Page 189: ...pot moves to the upper most horizontal graticule line Then change the following 371B settings COLLECTOR SUPPLY MAX PEAK POWER WATTS 30 W DISPLAY VERTICAL 5 mV DIV STEP GENERATOR INVERT OFF 6 CHECK tha...

Page 190: ...osition of jumper J340 from CAL to ZERO on A3 A D board Table 5 17 Current Amplitude Accuracy AMPLITUDE Setting DMM Reading m m m m Specifications Each step is within 2 of total output 3 of step AMPLI...

Page 191: ...ribed 371B Change the following 371B setting POWER ON 371B Settings Change the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 3 W DISPLAY Mode NON STORE VERTICAL 20 mA DIV STEP GENER...

Page 192: ...ormal step current source mode 4 Simultaneously press the SHIFT and COLLECTOR SUPPLY POLAR ITY buttons to set VERTICAL AMP CHECK MODE 5 Press the SHINGLE button and press the REPEAT button ten times u...

Page 193: ...n invert on 8 CHECK that the digital multimeter reading is within the range 1957 0 mA to 2043 0 mA 9 Press the step generator INVERT button to turn invert off and disconnect the digital multimeter 10...

Page 194: ...etermined by measuring a calibrated voltage source is added to each pulse voltage measurement and compared to a table of limit values Equipment Setup Set up the equipment as shown in the following ill...

Page 195: ...ursor measurement variation 2 Apply 0 750 V from the voltage source 3 Note the reading of the horizontal CURSOR readout 4 Calculate Horizontal Cursor Applied Voltage Variation Example Applied Voltage...

Page 196: ...ord the horizontal cursor readout 12 Calculate Cursor Reading Variation Pulse Amplitude Example Cursor Reading 760 mV Variation 10 mV Pulse Amplitude 750 mV 750 mVB750 m mA 13 Check whether the calcul...

Page 197: ...tion and set controls as described 371B 371B Settings Initialize the 371B then set the following control as indicated STEP GENERATOR NUMBER OF STEPS 10 STEP OFFSET AMPLITUDE 100 mA OFFSET 1000 mA DISP...

Page 198: ...3 Setup for determining cursor measurement variation 2 Apply 0 750 V from the voltage source 3 Note the reading of the horizontal CURSOR readout 4 Calculate Horizontal Cursor Applied Voltage Variation...

Page 199: ...he horizontal CURSOR readout 12 Calculate Cursor Reading Variation Pulse Amplitude Example Cursor Reading 1510 mV Variation 10 mV Pulse Amplitude 1500 mV 1500 mVB750 mW 2000 mA 13 Check whether the ca...

Page 200: ...R OFFSET 10 mA CURSOR Mode DOT Protective Cover CLOSED 1 CHECK that the horizontal CURSOR readout is between 8 4 V and 15 6 V when the STEP OFFSET AMPLITUDE is turned throughout its range 2 Press the...

Page 201: ...the 371B then set the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 W STEP GENERATOR NUMBER OF STEPS 0 STEP OFFSET AMPLITUDE 1 mA Test Equipment Settings TEST OSCILLOSCOPE COUPLI...

Page 202: ...371B Service Manual Figure 5 25 Setup for checking ripple and pulse noise 4 Close the protective cover 5 CHECK that the ripple pulse noise is less than 20 mVp p 6 Disconnect the X1 probe and the patc...

Page 203: ...Equipment Setup Set up the equipment as shown in the following illustration and set controls as described Test Equipment Settings Removing the Shield Panel and Connecting the Meter 1 Change the follow...

Page 204: ...Pullout 2 in Chapter 8 for the location of adjustment R412 6 ADJUST HV CS OFFSET adjustment R412 on the A6 Collector Supply Output board for a digital multimeter reading of 0 V 1 00 mV Disconnecting...

Page 205: ...t the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 W HIGH VOLTAGE ENABLED VARIABLE 100 DISPLAY HORIZONTAL 500 V DIV CURSOR Mode DOT Determining Whether Adjustment is Necessary 1...

Page 206: ...V If the readouts are both within these limits proceed to Step 13 If either readout is not within these limits the following adjustment is necessary Adjusting Collector Supply Gain 10 Change the follo...

Page 207: ...ication 371B Service Manual 5 105 Determining Whether Further Adjustment is Necessary 12 Repeat Steps 3 to 8 to determine whether further adjustment is necessary Removing the Setup 13 Change the follo...

Page 208: ...re between 40 and 120 ms with collector supply VARIABLE set at 50 Equipment Setup Set up the equipment as shown in the following illustration and set controls as described 371B Settings Test Equipment...

Page 209: ...test oscilloscope time DIV to 50 ms DIV 5 CHECK that the half amplitude pulse width is between 225 ms and 275 ms 6 CHECK that the rise and fall time is between 40 ms and 120 ms from 10 to 90 of full...

Page 210: ...shown in the following illustration and set controls as described 371B 371B Settings Initialize the 371B then set the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 3 kW DISPLAY VERT...

Page 211: ...D position 9 Move the patch cord from the HIGH CURRENT terminal to the HIGH VOLTAGE terminal as shown in Figure 5 28 and close the protective cover Figure 5 28 Setup for checking maximum peak current...

Page 212: ...Performance Verification 5 110 371B Service Manual 19 Disconnect the patch cord Table 5 18 Minimum Output Current Peak Power Watts Setting Current Output Reading m m...

Page 213: ...hen set the following control as indicated COLLECTOR SUPPLY PEAK POWER WATTS 30 mW HIGH VOLTAGE ENABLED VARIABLE 100 0 DISPLAY HORIZONTAL 50 V DIV COLLECTOR CURSOR Mode DOT Protective Cover CLOSED 1 T...

Page 214: ...Set the peak power watts to 300 W 7 Set the HIGH CURRENT breaker to the ENABLED position 8 Set the VARIABLE control to 100 9 CHECK that the value of the horizontal CURSOR readout is set between 28 5 V...

Page 215: ...examined in this procedure are examples of typical instrument operation they are not specifications Equipment Setup Set up the equipment as shown in the following illustration and set controls as des...

Page 216: ...p for checking sense load resistance 2 CHECK that the resistance between the COLLECTOR SENSE and 1 is less than 1 W 3 CHECK that the resistance between the BASE SENSE and 2 is less than 1 W 4 CHECK th...

Page 217: ...operation they are not specifications Equipment Setup Set up the equipment as shown in the following illustration and set controls as described Test Equipment Settings 1 Connect the patch cords on th...

Page 218: ...e as shown in Figure 5 31 Figure 5 31 Setup B for Checking Test Fixture continuity 6 CHECK that the resistance between the COLLECTOR and 7 is less that 1 W 7 CHECK that the resistance between the BASE...

Page 219: ...adjustment procedures To reconfi gure the 371B perform the following 1 Turn off 371B power 2 Disconnect all test equipment from the 371B 3 Install any protective covers panels removed during the perf...

Page 220: ...Performance Verification 371B Service Manual...

Page 221: ...Options...

Page 222: ......

Page 223: ...Test result report Option A9 No power cord supplied 371B Programmable High Power Curve Tracer comes configured for installation in a 19 inch wide instrument rack A calibration data test result report...

Page 224: ...re set with Alligator clips 012 1371 00 Fuse 250 V 1 A slow blow 250 V 2 A slow blow 250 V 4 A slow blow 159 0019 00 159 0238 00 159 0291 00 Power Cord 161 0066 00 Utility Software FDD 063 3341 XX The...

Page 225: ...cessories 371B Service Manual 6 3 The following optional accessories listed in Table 6 3 are recommended for use with the instrument Table 6 3 Recommended accessories Accessory Model number Recommende...

Page 226: ...Options and Accessories 371B Service Manual...

Page 227: ...Electrical Parts List...

Page 228: ......

Page 229: ...entative Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements Therefore when ordering par...

Page 230: ...tration in the section and on the mechanical exploded views in the list section The component number is obtained by adding the assembly number prefix to the circuit number see Component Number illustr...

Page 231: ...the part is located Chassis mounted parts and cable assemblies are located at the end of the Replaceable Electrical Parts List The table titled Manufacturers Cross Index shows codes names and address...

Page 232: ...768 01 CIRCUIT BD ASSY SUB KEY 80009 671176801 A15 671 0226 01 CIRCUIT BD ASSY HIGH CURRENT POWER SUPPLY 80009 671022601 A16 671 0225 01 CIRCUIT BD ASSY HIGH CURRENT CONTROL 80009 671022501 A18 670 93...

Page 233: ...ctrical Parts List 371B Service Manual 7 5 Replaceable electrical parts list Cont Component number Mfr part number Mfr code Name description Serial no discont d Serial no effective Tektronix part numb...

Page 234: ...22 AWG 5 0 L RIBBON 80009 174030900 W190 174 0328 00 CA ASSY SP ELEC 4 18 AWG 15 5 L 80009 174032800 W194 174 0308 00 CA ASSY SP ELEC 6 22 AWG 20 0 L RIBBON 80009 174030800 W270 174 0986 00 CA ASSY SP...

Page 235: ...Diagrams...

Page 236: ......

Page 237: ...8 1 371B Service Manual Circuit Board Interconnections 2 2...

Page 238: ...371B Service Manual...

Page 239: ...8 3 371B Service Manual Circuit Board Interconnections 2 2...

Page 240: ...371B Service Manual...

Page 241: ...8 5 371B Service Manual Test Point Adjustment Locations 1...

Page 242: ...8 6 371B Service Manual Test Point Adjustment Locations 2...

Page 243: ...8 7 371B Service Manual Test Point Adjustment Locations 2...

Page 244: ...8 8 371B Service Manual Test Point Adjustment Locations 3...

Page 245: ...8 9 371B Service Manual Troubleshooting Tree...

Page 246: ...8 10 371B Service Manual Troubleshooting Tree Cont...

Page 247: ...8 11 371B Service Manual Troubleshooting Tree Cont...

Page 248: ...371B Service Manual...

Page 249: ...Mechanical Parts List...

Page 250: ......

Page 251: ...ber Instrument serial number Instrument modification number if applicable If you order a part that has been replaced with a different or improved part your local Tektronix field office or representati...

Page 252: ...scription 1 Figure Index Number Items in this section are referenced by component number 2 Tektronix Part Number Use this part number when ordering replacement parts from Tektronix 3 and 4 Serial Numb...

Page 253: ...O JAPAN TK0BV KYODO LIGHT METAL CO LTD 2 5 3 NIHONBASHI CHUO KU TOKYO JAPAN TK0BW MULTI CONTACT 2 7 2 SHINYOKOHAMA KITA KU YOKOHAMA CITY KANAGAWA JAPAN TK0CA SUZUKI ELEC MFG CO LTD 105 OHKUMA CHO MIDO...

Page 254: ...E SHERMAN PORTLAND OR 97214 07416 NELSON NAME PLATE CO 3191 CASITAS LOS ANGELES CA 90039 2410 11897 PLASTIGLIDE MFG CORP 2701 W EL SEGUNDO BLVD HAWTHORNE CA 90250 3318 12136 P H C INDUSTRIES INC 1643...

Page 255: ...124 0446 XX 1 STRIP TRIM TOP RIGHT 80009 1240446XX 13 426 2372 XX 1 FRAME SECTION TOP RIGHT TEK TAN AL ATTACHING PARTS 80009 4262372XX 14 211 0507 XX 2 SCREW MACHINE 6 32 X 0 312 PNH STL TK0435 ORDER...

Page 256: ...M RIGHT ATTACHING PARTS TK0191 4262138XX 39 211 0559 XX 2 SCREW MACHINE 6 32 X 0 375 FLH STL END ATTACHING PARTS TK0435 1593 300 40 334 3379 XX 1 MARKER IDENT MARKED GROUND SYMBOL 07416 ORDER BY DESC...

Page 257: ...MACHINE 2 56 X 0 281 FLH STL END ATTACHING PARTS TK0435 ORDER BY DESC 63 343 1271 XX 2 RTNR CAB COVER BLUE PLASTIC ATTACHING PARTS 80009 3431271XX 64 213 0782 XX 2 SCREW TPG TF 8 32 X 0 625 FILH STL...

Page 258: ...INT 0 025 THK SST 0KB01 1224 02 00 0541 86 200 1388 XX 2 COVER FUSE LEAD POLYURETHANE 0JR05 ORDER BY DESC 87 119 2683 00 1 FILTER RFI 50 60HZ 250VAC 6A FL100 ATTACHING PARTS TK2058 ZUB2206H F 88 211 0...

Page 259: ...9 9 371B Service Manual Figure 9 1 Cabinet Rear 97 96 68...

Page 260: ...371B Service Manual...

Page 261: ...9 11 371B Service Manual Figure 9 2 Display Front 73...

Page 262: ...371B Service Manual...

Page 263: ...ATTACHING PARTS TK0435 2011 300 13 331 0491 XX 1 MASK CRT 371B 80009 3310491XX 16 670 9324 01 670 9324 02 2 CIRCUIT BD ASSY LAMP R A28 CIRCUIT BD ASSY LAMP L A29 ATTACHING PARTS 80009 80009 670932401...

Page 264: ...X 0 563 ATTACHING PARTS 0JR05 ORDER BY DESC 42 211 0170 XX 2 SCREW MACHINE 4 40 X 2 25 PNH SST TK0435 ORDER BY DESC 43 214 1333 XX 2 SPRING HLCPS 0 213 OD X 0 375 CLE CU BE END ATTACHING PARTS 8X345...

Page 265: ...2 R312 R322 R330 R340 Electrical Part ATTACHING PARTS 80009 311245600 64 210 0583 XX 5 NUT PLAIN HEX 0 25 32 X 0 312 BRS 73743 2X 20319 402 65 210 0046 XX 5 WASHER LOCK 0 261 ID INTL 0 018 THK STL END...

Page 266: ...D ASSY INCLUDES TK0435 ORDER BY DESC 20 671 0236 21 1 CKT BOARD ASSY MOTHER A1 ATTACHING PARTS 80009 671023621 21 211 0661 XX 343 1084 XX 8 1 SCR ASSEM WSHR 4 40 X 0 25 PNH STL END ATTACHING PARTS CLA...

Page 267: ...9 17 371B Service Manual Figure 9 3 Chassis Ciircuit Board...

Page 268: ...371B Service Manual...

Page 269: ...9 19 371B Service Manual Figure 9 4 Power Supply...

Page 270: ...371B Service Manual...

Page 271: ...75 PNH STL TK0435 ORDER BY DESC 16 210 1003 XX 4 WASHER FLAT 0 2 ID X 0 438 OD X 0 036 BRS END ATTACHING PARTS 12327 ORDER BY DESC 17 407 3907 XX 1 BRACKET XFMR RIGHT ALUMINUM ATTACHING PARTS 80009 40...

Page 272: ...0507 XX 2 SCREW MACHINE 6 32 X 0 312 PNH STL END ATTACHING PARTS TK0435 ORDER BY DESC 41 441 1977 XX 1 CHASSIS XFMR REAR ASSY ALUMINUM ATTACHING PARTS 80009 4411977XX 42 211 0507 XX 2 SCREW MACHINE 6...

Page 273: ...E PC TK019 1 3420851XX 12 334 A583 00 1 MARKER IDENT MARKED TEST ADAPTER INFO TK0AU 30 0219 13 386 5698 XX 1 PLATE CONN MTG TEST FIXTURE ALUMINUM 80009 3865698XX 14 214 4097 XX 1 LATCH DOOR POLYACETAL...

Page 274: ...TTACHING PARTS TK019 1 3510823XX 40 210 0586 XX 4 NUT PL ASSEM WA 4 40 X 0 25 STL END ATTACHING PARTS TK0435 ORDER BY DESC 41 333 A441 00 1 PANEL FRONT 371B TEST FXTR ALUMINUM ATTACHING PARTS 80009 33...

Page 275: ...0938 XX 2 WASHER FLAT 0 109 ID X 0 25 OD X 0 032 STL END ATTACHING PARTS TK0413 ORDER BY DESC 66 348 1040 XX 4 FOOT CABINET BLACK PLASTIC TK0BK 5475 67 198 5627 XX 1 WIRE SET ELEC WITH CONNECTING BOX...

Page 276: ...Mechanical Parts List 371B Service Manual...

Page 277: ...9 27 371B Service Manual Figure 9 5 Test Fixture 78 78 REV MAR 96 75 72...

Page 278: ...371B Service Manual...

Page 279: ...9 29 371B Service Manual Figure 9 6 Front Porch...

Page 280: ...371B Service Manual...

Page 281: ...5MM H ABS 80009 3660621XX 11 377 0609 XX 1 INSERT KNOB 8 6MM ID X 16MM OD X 8MM H AL ATTACHING PARTS 80009 3770609XX 12 213 0022 XX 1 SETSCREW 4 40 X 0 188 STL END ATTACHING PARTS 0KB01 ORDER BY DESC...

Page 282: ...C 37 210 0457 XX 1 NUT PL ASSEM WA 6 32 X 0 312 STL END ATTACHING PARTS TK0435 ORDER BY DESC 38 342 0841 XX 1 INSULATOR CONN H V NYLON ATTACHING PARTS TK0DK 30 0073 39 211 0007 XX 2 SCREW MACHINE 4 40...

Page 283: ...ER BY DESC 12 211 0007 XX 2 SCREW MACHINE 4 40 X 0 188 PNH STL END ATTACHING PARTS TK0435 ORDER BY DESC 13 307 1372 00 1 RES FXD FILM 75K OHM 60W R800 ATTACHING PARTS TK0CH STC 010 00 14 211 0541 XX 4...

Page 284: ...185XX 36 122 0181 XX 1 ANGLE RAIL LEFT ATTACHING PARTS 80009 1220181XX 37 211 0502 XX 4 SCREW MACHINE 6 32 X 0 188 FLH STL END ATTACHING PARTS TK0435 ORDER BY DESC 38 344 0396 XX 4 CLIP CABLE PVC 8000...

Page 285: ...NH STL END ATTACHING PARTS TK0435 ORDER BY DESC 60 348 1046 XX 1 GROMMET CHANNEL 2 4MM X 98MM L NYLON TK0AR 30 0602 61 334 7069 XX 1 MARKER IDENT MARKED DANGER TK0CX 30 0101 62 344 0409 XX 2 CLIP RETA...

Page 286: ...09 1220182XX 81 211 0502 XX 4 SCREW MACHINE 6 32 X 0 188 FLH STL END ATTACHING PARTS TK0435 ORDER BY DESC 82 441 1976 XX 1 CHASSIS DRAWER MAIN ASSY AL 80009 4411976XX 83 119 3456 00 1 FLOPPY DISC DRIV...

Page 287: ...371B Service Manual...

Page 288: ...371B Service Manual...

Page 289: ...371B Service Manual 6 5...

Page 290: ...371B Service Manual...

Page 291: ...80009 80009 PER TEK P N 1590019XX 1590228 00 159029100 0633341XX 016A32800 8 1 161 0066 00 1 CA ASSY PWR 3 18 AWG 250V 10A 98 INCH STR STANDARD ONLY S3109 161006600 2 161 0066 09 1 CA ASSY PWR 3 0 75...

Page 292: ...Mechanical Parts List 371B Service Manual...

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