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Theory of Operation

3–4

TSG 95 Service Manual

Once the signal data has been processed by the ASIC it is output to the DAC
(U14, A1

<

3

>

, D0..9).

The ASIC provides a divide-by-eight (3.375 MHz) clock to the tone chip (U12).

The digital-to-analog converter (DAC, U14, A1

<

3

>

) takes 10-bit data from the

ASIC (U26, A1

<

2

>

) and converts the data to an analog signal. U14 gets its

27 MHz clock, which is a delayed and buffered version of the oscillator (Y1, A1

<

2

>

) output, from the ASIC. U14 provides its own band-gap reference voltage.

This reference voltage is decreased when transistor Q8 is switched on with a low
level on DACGAIN. R66 is used to adjust the decrease in gain. Q8 is off (DAC-
GAIN high) for PAL and on (DACGAIN low) for NTSC to maintain correct
scaling for both standards. The power supply for U14 is +5 V filtered through
R16 and C11.

The output of U14 is applied to an op-amp (U15) which is configured as a differ-
ential amplifier (diff amp). The output of the DAC is referenced to +5 V and va-
ries b3 V and +5 V. The diff amp has a gain of 0.487 and references the
signal to ground. This gives a voltage range of 0 V to 0.975 V. R32 and R33
form the noninverting input of the diff amp, and are connected to +5 V. R34 and
R35 form the inverting input, and are connected to the DAC output. The differ-
ence b5 V and the DAC output voltage is amplified by 0.487 and refer-
enced to ground. Note that the output of the DAC is an inverted video signal
which is then inverted by the diff amp.

The output of the diff amp (U15) is applied to R6. R6 serves as a source termina-
tion of 75

Ω

for the output filter. The combination of R6 and R14 causes the am-

plitude of the video signal to be halved.

The output filter is formed by L4–L6 and C36–C43. It serves as an antialiasing
filter for the DAC output.

The output filter is terminated into 75

Ω

(R14) and applied to the op-amp U11.

U11 is configured as a noninverting amplifier. The gain of this amplifier is deter-
mined by R52, R11, R10, R8, and R7.

The gain of the amplifier is set by varying a potentiometer, R52. The amplifier
gain is used to establish a 1 V video output level. The offset voltage is set by R8,
R7, R52, R11, R10, and the 2.5 V reference (U20). The offset can be varied by
potentiometer R7. The offset is used to obtain the negative voltage required for
horizontal sync.

A sinx/x correction for the digitally constructed signal is performed by R9, R71,
C6, and C7; C7 and R71 are used to vary the amount of correction.

The output of the op-amp (U11) is connected to R13, which is the 75

Ω

output

resistance of the TSG 95.

Video DAC and Output

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Содержание TSG 95

Страница 1: ...70 8917 04 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 summar...

Страница 2: ...tents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc P O...

Страница 3: ...tions 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...

Страница 4: ......

Страница 5: ...ich this declaration relates is in conformity with the following standards EN50081 1 Generic Emission Standard EN50082 1 Generic Immunity Standard EN60555 2 Power Line Harmonics Standard following the...

Страница 6: ...TSG 95 Service Manual...

Страница 7: ...itions 2 5 Preliminary Settings 2 5 Other Settings 2 6 Using Your TSG 95 2 7 Theory of Operation 3 1 Circuit Description 3 1 Performance Verification and Adjustment Procedures 4 1 Required Test Equipm...

Страница 8: ...rgence vertical lines 1 18 Figure 1 11 PAL Convergence horizontal lines 1 19 Figure 1 12 PAL 5 Step Gray Scale 1 19 Figure 1 13 PAL Modulated 5 Step 1 20 Figure 1 14 PAL Multiburst 1 20 Figure 1 15 PA...

Страница 9: ...Block Diagram 3 1 Figure 4 1 XLR Female to Mini XLR Male Adapter Cable Pinout 4 2 Figure 4 2 A Setup for Verifying the Oscillator Frequency 4 8 Figure 4 3 VM700A Horizontal Timing Measurement Screen 4...

Страница 10: ...iv TSG 95 Service Manual Table 1 9 Physical Characteristics 1 12 Table 1 10 Power Supply 1 13 Table 1 11 Environmental Characteristics 1 13 Table 2 1 TSG 95 Video Test Signals 2 8 Table 4 1 Required T...

Страница 11: ...e care not to short battery terminals together when replacing batteries When replacing alkaline batteries all batteries should be replaced at the same time Recharge Batteries Properly Do not attempt t...

Страница 12: ...ely accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the...

Страница 13: ...y Only qualified personnel should perform service procedures Read this Service Safety Summary and the General Safety Summary before performing any service procedures Use the Proper Fuse Use only the t...

Страница 14: ...Service Safety Summary viii TSG 95 Service Manual...

Страница 15: ...Tektronix Standard 062 2853 00 Electromagnetic Compatibility Environmental Test 31 March 1977 Tektronix Standard 062 2866 00 Recommendations and reports of the CCIR 1978 Transmission of Sound Broadcas...

Страница 16: ...ectronic Measuring and Test Equipment H IEC1010 1 Safety Requirements for Electrical Equipment for Measure ment Control and Laboratory Use 1990 H UL1244 Standard for Electrical and Electronic Measurin...

Страница 17: ...0 5 Frequency Response Flat within 2 to 4 8 MHz 3 to 5 8 MHz Sin x x 1 dB to 5 MHz Field Tilt 0 5 Line Tilt 0 5 5 Step Linearity Error 1 Relative step matching Differential Gain 1 0 5 typical Differe...

Страница 18: ...an Green Magenta Red Blue Luminance Subcarrier Subcarrier Amplitude Amplitude Phase Pedestal mV mVp p degrees 700 0 0 0 0 0 465 1 470 5 167 1 368 0 663 8 283 5 308 2 620 1 240 7 216 8 620 1 60 7 157 0...

Страница 19: ...ude See Figure 1 26 525 mV Green Field Luminance Pedestal Chrominance Amplitude Chrominance Phase See Figure 1 5 308 2 mV 620 1 mVp p 240 7 Blue Field Luminance Pedestal Chrominance Amplitude Chromina...

Страница 20: ...nes 24 47 336 359 see Figure 1 17 48 71 360 383 see Figure 1 18 72 95 384 407 see Figure 1 19 96 119 408 431 see Figure 1 20 120 143 432 455 see Figure 1 1 144 166 456 478 see Figure 1 21 167 190 479...

Страница 21: ...he NTC7 Compos ite signal SCH Phase 0 5 Frequency Response Flat within 2 to 4 2 MHz Sin x x 1 dB to 4 2 MHz Field Tilt 0 5 Line Tilt 0 5 5 Step Linearity Error 1 Relative step matching Differential Ga...

Страница 22: ...549 1 00 0 00 0 492 6 443 3 167 1 400 9 626 6 283 5 344 5 585 2 240 7 258 2 585 2 60 7 201 7 626 6 103 5 110 1 443 3 347 1 53 6 285 7 303 0 53 6 285 7 33 0 SMPTE Bars Zero Setup Rise Times Luminance C...

Страница 23: ...1 31 201 74 mV 28 3 IRE 626 66 mVp p 87 8 IRE 103 5_ Red Field Zero Setup Luminance Pedestal Chrominance Amplitude Chrominance Phase See Figure 1 32 160 14 mV 22 4 IRE 677 08 mVp p 94 8 IRE 103 5_ Sin...

Страница 24: ...NTC7 Composite Bar Amplitude Rise Time 2T Pulse Amplitude HAD Modulated Sin2 Pulse Phase Amplitude HAD Modulate 5 Step Staircase Luminance Chrominance See Figure 1 42 714 3 mV 100 IRE 125 ns 714 3 mV...

Страница 25: ...MHz All Other Packets See Figure 1 45 428 6 mV 60 IRE 428 6 mVp p 60 IRE equal width packets 214 3 mV 30 IRE 0 5 1 25 2 0 3 0 3 75 and 4 0 MHz 140 ns typical sine squared packets 400 ns typical sine s...

Страница 26: ...0 4 or 8 dBu into 600 Default Values May be recalibrated by qualified technicians Amplitude Accuracy 0 25 dBu Connector Polarity Pin 1 GND Pin 2 POS Pin 3 NEG Output Impedance 50 Frequency 50 63 125...

Страница 27: ...pical not charging 2 0 W 2 5 W Peak Inrush Current 1 95 A 230 VAC Environment E2 Table 1 11 Environmental Characteristics Characteristic Information Temperature Operating Storage 0 C to 50 C 32 to 122...

Страница 28: ...ce Manual PAL Waveform Diagrams NOTE Time references in the following waveform diagrams apply to the signal half am plitude points or pulse peaks unless indicated otherwise Figure 1 1 PAL 75 Color Bar...

Страница 29: ...Specifications TSG 95 Service Manual 1 15 Figure 1 3 PAL 75 Red and Red Field Figure 1 4 PAL 100 Red...

Страница 30: ...Specifications 1 16 TSG 95 Service Manual Figure 1 5 PAL Green Field Figure 1 6 PAL Blue Field...

Страница 31: ...Specifications TSG 95 Service Manual 1 17 Figure 1 7 PAL 50 Flat Field Figure 1 8 PAL 100 Flat Field...

Страница 32: ...Specifications 1 18 TSG 95 Service Manual Figure 1 9 PAL 0 Flat Field Figure 1 10 PAL Convergence vertical lines...

Страница 33: ...Specifications TSG 95 Service Manual 1 19 Figure 1 11 PAL Convergence horizontal lines Figure 1 12 PAL 5 Step Gray Scale...

Страница 34: ...Specifications 1 20 TSG 95 Service Manual Figure 1 13 PAL Modulated 5 Step Figure 1 14 PAL Multiburst...

Страница 35: ...Specifications TSG 95 Service Manual 1 21 Figure 1 15 PAL Reduced Sweep Figure 1 16 PAL Pluge...

Страница 36: ...Specifications 1 22 TSG 95 Service Manual Figure 1 17 PAL Matrix Signal CCIR 17 Figure 1 18 PAL Matrix Signal CCIR Line 330...

Страница 37: ...Specifications TSG 95 Service Manual 1 23 Figure 1 19 PAL Matrix Signal CCIR Line 331 Figure 1 20 PAL Matrix Signal CCIR 18...

Страница 38: ...Specifications 1 24 TSG 95 Service Manual Figure 1 21 PAL Matrix Signal Sin x x Figure 1 22 PAL Matrix Signal 15 kHz Square Wave...

Страница 39: ...Specifications TSG 95 Service Manual 1 25 Figure 1 23 PAL Matrix Signal Shallow Ramp Figure 1 24 PAL Matrix Signal UK ITS 1...

Страница 40: ...Specifications 1 26 TSG 95 Service Manual Figure 1 25 PAL Matrix Signal UK ITS 2...

Страница 41: ...Specifications TSG 95 Service Manual 1 27 Figure 1 26 PAL Safe Area...

Страница 42: ...Specifications 1 28 TSG 95 Service Manual NTSC Waveform Diagrams Figure 1 27 SMPTE NTSC Color Bar Components...

Страница 43: ...Specifications TSG 95 Service Manual 1 29 Figure 1 28 SMPTE NTSC Color Bars Zero Setup...

Страница 44: ...Specifications 1 30 TSG 95 Service Manual Figure 1 29 NTSC 75 Color Bars Figure 1 30 NTSC 75 Color Bars Zero Setup...

Страница 45: ...Specifications TSG 95 Service Manual 1 31 Figure 1 31 NTSC Red Field Figure 1 32 NTSC Red Field Zero Setup...

Страница 46: ...Specifications 1 32 TSG 95 Service Manual Figure 1 33 NTSC Sin x x Figure 1 34 NTSC 5 Step Staircase Gray Scale...

Страница 47: ...Specifications TSG 95 Service Manual 1 33 Figure 1 35 NTSC 0 IRE No Burst Figure 1 36 NTSC 30 IRE Zero Setup and 50 IRE Flat Fields...

Страница 48: ...Specifications 1 34 TSG 95 Service Manual Figure 1 37 NTSC Black Burst Figure 1 38 NTSC Black Burst Zero Setup and Bounce Low...

Страница 49: ...Specifications TSG 95 Service Manual 1 35 Figure 1 39 NTSC 100 IRE Field Square Wave and Bounce High Figure 1 40 NTSC Multiburst...

Страница 50: ...Specifications 1 36 TSG 95 Service Manual Figure 1 41 NTSC Convergence Components...

Страница 51: ...Specifications TSG 95 Service Manual 1 37 Figure 1 42 NTC7 NTSC Composite Figure 1 43 NTC7 NTSC Combination...

Страница 52: ...Specifications 1 38 TSG 95 Service Manual Figure 1 44 FCC NTSC Composite Figure 1 45 NTSC Cable Multiburst...

Страница 53: ...Specifications TSG 95 Service Manual 1 39 Figure 1 46 NTSC Cable Sweep Figure 1 47 NTSC Matrix...

Страница 54: ...Specifications 1 40 TSG 95 Service Manual Figure 1 48 NTSC Safe Area...

Страница 55: ...nformation This section duplicates material contained in the TSG 95 User manual Tektronix part number 070 8916 XX This material is included for your convenience Please check the User manual if you nee...

Страница 56: ...teries only with standard AA batteries 1 2 1 5 V nominal or with a Tektronix rechargeable battery pack p n 119 4488 00 If you use NiCad AA batteries or the optional battery pack be sure to set the bat...

Страница 57: ...arging the battery pack fully can take up to 16 hours NOTE Charging will occur only if the adapter supplies at least 12V make sure that the adapter you use is appropriate for the local AC supply H AA...

Страница 58: ...rument power On and Off Connecting the TSG95 Connect the instrument to your equipment as you would any television test sig nal generator Use 75W coaxial cable for video and be sure that the signal pat...

Страница 59: ...to 10 dBu See page 4 29 in the Performance Verification and Adjustment section of this manual for instructions Preliminary Settings Once the TSG 95 is up and running you should make some settings that...

Страница 60: ...utes have passed without a key press Enable this feature when using battery power and operating in an environment in which unplanned shutdown of the TSG 95 is per missible 1 While still in the Utility...

Страница 61: ...ect a frequency sweep that sweeps continuously from 50 Hz to 20 kHz page 2 9 H Designate three User Tones between 50 Hz and 20 kHz with a resolution of 1 Hz page 5 7 and later output one of these freq...

Страница 62: ...IRE Flat Field H Blue Field 5 Step Black Burst I Red Field Multiburst 5 Step J 100 Flat Field NTC7 Composite Multiburst K 50 Flat Field NTC7 Combination NTC7 Composite L 0 Flat Field FCC Composite NTC...

Страница 63: ...cs section by pressing Enter when in the TONE FREQ menu item and SWEEP 50 20K is selected The message SWEEP PAUSED will appear on the display You may find this capability useful for checking a problem...

Страница 64: ...if ID cyc but it can still be edited and saved in either case 1 Press ID Edit The current ID message will appear on the LCD 2 Use the arrow keys to position the blinking underline cursor and enter te...

Страница 65: ...later recall or inclusion in an ID cycle 1 Press Shift then Recall The display will change to resemble this illustra tion The first line of the current message will occupy the bottom half of the disp...

Страница 66: ...rted in the video output if ID is toggled On with the ID On Off key and the ID CYCLE item of the ID menu is set to on When those two conditions are met the TSG 95 display will indicate ID cyc during n...

Страница 67: ...to the ID CYCLE on off selection Press A or to toggle the selection The cycle will appear in the picture if toggled on with the ID On Off key To save the current instrument settings as a preset 1 Pre...

Страница 68: ...display use the B key to see the second line 3 When the desired storage number is displayed press Enter to recall the pre set The video and audio output of the TSG 95 will return to the signal and to...

Страница 69: ...a keyboard LCD microprocessor clock oscillator character ID generator digital timing and signal generation video DAC and output audio tone generation and power supply Refer to the schematics of the in...

Страница 70: ...et the mP if the power sup ply voltage drops below 4 5 V When the instrument is powered up U23 holds the mP in reset until the power supply stabilizes Port C has several functions Bits 3 0 are used as...

Страница 71: ...The 27 MHz temperature compensated oscillator TCXO Y1 is the source of all clocks in the system U21 is used to buffer the output of the oscillator The buff ered clock drives only the ASIC U26 The ASI...

Страница 72: ...nnected to 5 V R34 and R35 form the inverting input and are connected to the DAC output The differ ence between 5 V and the DAC output voltage is amplified by 0 487 and refer enced to ground Note that...

Страница 73: ...o create the other half of a balanced output R20 and R21 form a 50 balanced output impedance U13 is a special op amp that goes into a low power sleep mode when either a low load current is required or...

Страница 74: ...A 4 low This sets U22A 6 low enabling the power supply controller U27 through U27 5 When the ON key is pressed again U2 detects the key press stores in formation for power up and then drives the gate...

Страница 75: ...quipment represents the minimum required for the Perfor mance Verification and Adjustment procedures While alternate equipment may be used it is not recommended Alternate equipment must meet the minim...

Страница 76: ...male Mini XLR with 600 load on cable or audio measurement set Figure 4 1 shows cable suit able for use with VM700A option 40 BNC Coaxial Cable 75 impedance Tektronix p n 012 0074 00 End Line Terminat...

Страница 77: ...quency Subcarrier of genlocked generator j PAL 4 43361875 MHz 10 Hz j NTSC 3 579545 MHz 10 Hz 2 Check Blanking Level j PAL and NTSC 0 V 50 mV 3 Check Sync Amplitude j PAL 300 mV 14 mV j NTSC 285 7 mV...

Страница 78: ...ndwidth j Channel 1 1 j Channel 2 1 2 Check Audio Output Amplitude j 10 dBu 10 dBu 0 25 dBu at 1 kHz both channels j 0 dBu 0 dBu 0 25 dBu at 1 kHz both channels j 4 dBu 4 dBu 0 25 dBu at 1 kHz both ch...

Страница 79: ...dit it c Rotate the knob until the Auto Mode Composite X XX line is highlighted where XX is a number from 10 to 262 d Press your finger on the screen over the XX readout a box should now appear around...

Страница 80: ...have finished testing the TSG 95 you can return the VM700A to the original settings f Press your finger over the XXXXX readout a box should now appear around the readout g Rotate the knob until the re...

Страница 81: ...o the B input of the frequency counter d Set the frequency counter for a ratio of A B and set the AVG to 106 e If the TSG 95 is not set to generate NTSC signals perform the following steps otherwise c...

Страница 82: ...put and terminate the loopthrough in 75 b Select the Matrix signal from the TSG 95 press R c View Ch A line 265 on the VM700A d Press the following VM700A keys Measure Level Meter Menu Measure Positio...

Страница 83: ...nal from the TSG 95 press R b Press the following keys Measure H_Timing and Average c CHECK that the Burst Amplitude is 300 mV 14 mV See Fig ure 4 3 4 Check Sync Rise Time H Check the VM700A display t...

Страница 84: ...wing VM700A keys Measure Luminance NonLinear ity and Average c CHECK that Luminance Non Linearity is 1 99 Lum Non Lin earity 101 See Figure 4 4 NOTE The Luminance Non Linearity measurement on the VM70...

Страница 85: ...ollowing VM700A keys Measure ChromLum GainDe lay Average and Line Select c Use the VM700A front panel knob to select line 19 d CHECK that the Chroma Gain is 100 2 e CHECK that the Chroma Delay is 10 n...

Страница 86: ...onfiguring the VM700A so that the following checks can be made in Auto mode 10 Line Tilt a Select the Matrix signal from the TSG 95 press R then press the VM700A Auto key b Check the VM700A display to...

Страница 87: ...onvert the TSG 95 to the NTSC signal set and to change the video standard of the VM700A follow these steps H Press and hold the Lock Out key down then press the ON key H Select the NTSC video standard...

Страница 88: ...the NTC7 Composite signal from the TSG 95 press K b Press the following VM700A keys Measure Bar LineTime and Average c CHECK that Sync Amplitude is 285 7 mV 14 28 mV 40 IRE 2 IRE Burst Amplitude Sync...

Страница 89: ...to verify that the Sync Rise Time is 140 ns 20 ns See Figure 4 6 5 Check 5 Step Linearity a Select the NTC7 Composite signal from the TSG 95 press K b Press the following VM700A keys Measure Luminance...

Страница 90: ...Accuracy a Select the NTC7 Composite signal from the TSG 95 press K b Press the following VM700A keys Measure Bar LineTime and Average c CHECK that Bar Level is 714 3 mV 7 143 mV 100 IRE 1 IRE See Fig...

Страница 91: ...Performance Verification and Adjustment Procedures TSG 95 Service Manual 4 17 Bar Level Figure 4 8 VM700A Bar Level Measurement Screen...

Страница 92: ...e VM700A display to verify that Chroma Lum Delay is no greater than 15 ns and Chroma Lum Gain is 2 of 714 3 mV be tween 700 014 and 728 586 8 Differential Phase and Gain H Check the VM700A display to...

Страница 93: ...l press K b Press the VM700A Auto key c Check the VM700A display to verify that Line Time Distortion is no greater than 0 5 NOTE The VM700A Line Time Distortion measurement is equivalent to the Line T...

Страница 94: ...e following VM700A keys Measure Audio Audio Ana lyzer c Set the Tone Frequency Amplitude and ID Click with these steps H If the Pathfinder tone is off turn it on by pressing the Tone On Off key H Open...

Страница 95: ...hannels is 4 dBu 0 25 dBu e Set the TSG 95 Audio Level to 8 dBu f Go back up to the TONE FREQ menu item press the Y key and select the appropriate frequencies in turn to CHECK that the Audio Level is...

Страница 96: ...0 V 20 mV 4 Adjust NTSC Gain j NTSC NTC7 Composite signal j VM700A to Measure mode Signal Level Meter j Adjust R66 for Level b a 714 3 mV 2 mV 5 Adjust PAL Multiburst j Multiburst signal j VM700A to M...

Страница 97: ...lay is 10 ns j Adjust L7 and C6 if the specifications are not met 12 Adjust NTSC SCH Phase j NTC7 Composite signal j VM700A to Measure mode SCH_Phase j Check that SCH Phase is 0 4 j Adjust L7 if speci...

Страница 98: ...bcarrier output to the frequency counter A input using a 75 coaxial cable c Connect a reference such as WWV to the B input of the frequency counter d Set the frequency counter for a ratio of A B and s...

Страница 99: ...s a e Use the VM700A front panel knob to position the a cursor on the col or back porch See Figure 4 10 Cursor b Cursor a Figure 4 10 VM700A Level Meter Screen f Press the Pos b key and position the b...

Страница 100: ...95 video standard to PAL and select the Multiburst sig nal Press N b Press the following VM700A keys Measure Video Standard MultiBurst and Select Line c Select line 25 with the VM700A front panel knob...

Страница 101: ...in c Use the VM700A front panel knob to set the Graticule Gain to 0 5 d Press the Move Expand key Expand the signal by rotating the knob clockwise until the VM700A clicks Press the Move Expand button...

Страница 102: ...n e Press the Average key f CHECK that all packets have a variance within 0 14 dB ADJUST L7 C6 and R71 only if the specification is not met 11 Adjust NTSC Chrominance to Luminance Gain and Delay a Sel...

Страница 103: ...h If desired use the A and keys to rename Tone Level 1 Level 1 is set to 10 dBu during factory calibration the possible selections are 10 to 3 dBu and 0 to 10 dBu NOTE Step h changes only the level na...

Страница 104: ...Performance Verification and Adjustment Procedures 4 30 TSG 95 Service Manual...

Страница 105: ...impact on battery life The battery types are disposable Alkaline or rechargeable NiCad Setting the battery type changes the voltage thresholds for both the BATTERY LOW display message and low battery...

Страница 106: ...ent procedures Clean the instrument often enough to prevent dust and dirt from accumulating in or on it Dirt can provide high resistance electrical leakage paths between con ductors or components in a...

Страница 107: ...t numbering and assembly numbering NOTE No repair should be attempted during the warranty period Instead contact your nearest Tektronix representative or field office The TSG 95 has a number of built...

Страница 108: ...Board Assembly The part numbers for ordering these boards are listed first in Section 6 the Re placeable Electrical Parts list EPL The EPL is arranged in assembly by assembly order as designated in A...

Страница 109: ...tructions and a list of the available signals 3 VITS SIGNALS Y B VITS SIGNALS A 3 VITS Vertical Interval Test Signal insertion use the left A or right arrow key to toggle between VITS SIGNALS and NO V...

Страница 110: ...iagnostic submenu This submenu includes items that are used during instrument manufacture and service Please see The Diagnostic Submenu beginning on page 5 9 for more information EXIT MENU Y B Press E...

Страница 111: ...VL Y B ADJUST POT 5 Used to set tone level DC offset Please see the audio adjustment procedure beginning on page 4 29 of this manual for instructions 6 NAME TONE LV1 Y B 10dBu A 6 Name tone level 1 Co...

Страница 112: ...before changing a tone level from its as manufactured value To ensure your ability to restore the original factory tone calibration settings in the case of inadvertent changes please record the follo...

Страница 113: ...SIG Y B NORMAL SIG A 14 This item selects special output signals used during manufacture F FACTORY RESET Y B 15 Press Enter to restore most of the original as manufactured instrument set tings WARNIN...

Страница 114: ...hifted name will be written to the second line of the display as long as you hold the key down For instance the display should look something like this when you press the Tone On Off key down Press an...

Страница 115: ...ompletion of the tests Exit this diagnostic by pressing the Y or B key as usual EXIT SUBMENU Y B Press Enter 8 To exit the Diagnostic submenu scroll to this item and press Enter The instrument will re...

Страница 116: ...3 Disconnect the battery cable from J10 Make sure to pull on the connector housing to do this not the wires The back cover is now free and may moved away from the instrument 4 Replacement is the reve...

Страница 117: ...to replace the TSG 95 keypad 1 Place the Keypad board with the pins of the connector towards the work bench 2 Place the rubber keypad on top of the Keypad board positioning it so that the ON button is...

Страница 118: ...Maintenance 5 14 TSG 95 Service Manual...

Страница 119: ...ektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Using the Replaceable Electrical Parts...

Страница 120: ...iated electrical part for example fuse holder follows fuse Chassis mounted parts and cable assemblies have no assembly number prefix and are located at the end of the electrical parts list Indicates p...

Страница 121: ...ORP 2900 SEMICONDUCTOR DR SANTA CLARA CA 95051 0606 31433 KEMET ELECTRONICS CORP NATIONAL SALES HEADQUARTERS PO BOX 5928 GREENVILLE SC 29606 32997 BOURNS INC TRIMPOT DIVISION 1200 COLUMBIA AVE RIVERSI...

Страница 122: ...0 25V Z5U 5 9X2 7MM SM2210 SMD T R TK1920 1E106ZY5U C205M A1C15 283 5267 00 CAP FXD CERAMIC MLC 1UF 80 20 25V Y5V 1206 04222 12063G105ZAT1A A1C16 283 5267 00 CAP FXD CERAMIC MLC 1UF 80 20 25V Y5V 1206...

Страница 123: ...353 06 671 3353 06 CAP FXD CER DI 18PF 5 50V TAPE REEL 18796 RPE121 911C0G181 J50V A1C79 283 0168 00 671 3353 07 CAP FXD CER DI 12PF 5 100V SQUARE 04222 SR151A120JAA A1CR1 152 5027 00 DIODE RECT SCHTK...

Страница 124: ...R11 321 5022 00 671 3353 01 RES FXD THICK FILM 2 21K OHM 1 0 125W TC 100 PPM 50139 BCK2211FT A1R11 321 5017 00 671 3353 02 RES FXD THICK FILM 825 OHM 1 0 125W TC 100 PPM 1206 T R 50139 BCK8250FT A1R13...

Страница 125: ...0 IC MEMORY CMOS EPROM 256K X 8 150NS 80009 163 0241 00 A1U11 156 6560 00 IC LINEAR BIPOLAR OP AMP CURRENT FEED BACK 100MHZ HIGH OUTPUT CURRENT 13919 OPA603AU A1U12 156 6518 00 IC MISC CMOS WAVEFORM G...

Страница 126: ...ARD 80009 671258601 A2J1 131 5781 00 CONN HDR PCB MALE STR 2 X 10 0 1 CTR 0 380 55322 MTLW 110 08 S D A3 119 5566 01 DISPLAY MODULE LCD 16 CHARACTERS X 2 LINES 5 X 7 DOT MATRIX TRANSFLECTIVE YEL GRN L...

Страница 127: ...r for example A5 The as sembly number appears in the title on the diagram in the lookup table for the schematic dia gram and corresponding component locator illustration The Replaceable Electrical Par...

Страница 128: ...16 D2 C3 S17 D2 C2 S18 D1 C1 S19 D1 C1 S20 D1 B1 S21 C1 B1 S22 B1 A1 S23 B1 A1 S24 B2 A2 S25 B2 A3 S26 B3 A3 S27 B3 A4 S28 B4 A5 S29 C4 B5 S30 D4 C5 S31 D3 C4 S32 D3 C3 S33 D2 C3 S34 D2 C2 S35 D1 C2 S...

Страница 129: ...COL0 COL4 VIN ON_KEY J1 CONNECTS TO J2 A1 MAIN BOARD 2 ON_KEY VIN ON S41 ROW2 D S17 C S34 RECALL STORE B S37 OTHER SIGNAL TONE ON OFF TONE MENU A SHIFT SHIFT LOCK S3 S24 E F S25 S4 S5 S26 G S38 S39 H...

Страница 130: ...Q8 3 C2 E3 Q9 3 F4 B2 Q10 3 F3 B2 R1 2 G1 B1 R2 2 C1 G2 R6 3 D1 E4 R7 3 G2 C3 R8 3 G2 B3 R9 3 G2 A4 R10 3 G2 A4 R11 3 G2 A3 R13 3 G1 A3 R14 3 F1 B3 R16 3 C1 F3 R18 3 F2 A2 R20 3 G3 B2 R21 3 G3 B2 R22...

Страница 131: ...31 VDD CORE 139 GND CORE 141 VDD 149 GND 151 SEGD9 12 VDD 29 GND 31 SEGWE 38 37 39 NC 40 NC 80 FSYNC 77 VSYNV 78 HSYNC 79 72 NC 120 NC 160 LFD7 124 CLK 2 129 U26 ADG313 SD0 SD1 SD2 SD3 5V AD0 AD1 AD2...

Страница 132: ...Q7 B4 C1 Q8 C2 E3 Q9 F4 B2 Q10 F3 B2 R6 D1 E4 R7 G2 C3 R8 G2 B3 R9 G2 A4 R10 G2 A4 R11 G2 A3 R13 G1 A3 R14 F1 B3 R16 C1 F3 R18 F2 A2 R20 G3 B2 R21 G3 B2 R22 E3 B2 R23 G3 A2 R24 G3 A2 R32 C1 F4 R33 C1...

Страница 133: ...OT INSTALLED G4 2 5VA 5VA Q3 R67 392 C15 1UF C16 1UF R18 22 1K R36 1 50K 3 2 1 8 4 U13A LT1352 SINX X R20 24 9 R24 10 0K R54 1 21K CH1 AUDIO OUT 1 2 3 4 1 2 AUDIO OUT CH2 1 2 3 4 1 2 3 4 J9 R21 24 9 R...

Страница 134: ...TSG 95 Service Manual 7 8...

Страница 135: ...have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is lo...

Страница 136: ...to indicate relationship 1 2 3 4 5 Name Description Assembly and or Component Mounting parts for Assembly and or Component MOUNTING PARTS END MOUNTING PARTS Detail Part of Assembly and or Component M...

Страница 137: ...913 00 1 KIT ASSEMBLY BATTERY HOLDER SUB ASSEMBLY MOUNTING PARTS 80009 614091300 2 211 0097 00 4 SCREW MACHINE 4 40 X 0 312 PNH STL END MOUNTING PARTS TK0435 ORDER BY DESC 3 348 1347 00 4 PAD CUSHIONI...

Страница 138: ...787 00 OPTIONAL ACCESSORIES 21 119 4488 00 070 8917 02 1 1 BAT PACK ASSY MANUAL TECH SERVICE TSG95 0DWW6 80009 101 147 1 070891702 119 4540 02 1 POWER SUPPLY WALL MOUNT 12W 220 VAC 50HZ IN 12VDC 1 0A...

Страница 139: ...Replaceable Mechanical Parts 8 5 TSG 95 Service Manual A1 A2 A3 Figure 1 Exploded View...

Страница 140: ...Replaceable Mechanical Parts 8 6 TSG 95 Service Manual...

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