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TROUBLESHOOTING GUIDE

Yes

Is there VIDEO signal at
pin 6 of IC4002 and
Does VIDEO signal appear at
pin 8 of IC4001 ?

Does FM signal appear
at pin 8 to CP4001 ?

Yes

Check CYLINDER UNIT
and IC4101 circuit.

Check the circuit from VIDEO input
jack to IC4001, from Tuner Pack to
IC4001.

Check the peripheral circuit of Q4007,
Q4009.

Replace IC4001.

Replace IC4101.

RECORDING MECHANISM WORKS,
BUT NO VIDEO RECORDED FROM
INPUT JACK OR TUNER

Does VIDEO signal
appear at pin 51 or 53
of IC4001 ?

Does the FM current
appear at pin 8 of IC4101
during the REC.

E-26

Содержание VX-T1480

Страница 1: ...FORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB UNPLUG THE POWER CORD FROM THE AC SOURCE Fig 1 4 1 5 MAIN PCB Refer to Fig 1 5 1 Remove the 5 screws 1 2 Unlock the 2 supports 2 and remove the TV Main PCB...

Страница 2: ...he Polyslider Washer 1 2 Remove the Center Pulley 3 Remove the Polyslider Washer 2 4 Remove the Center Pulley Spring 5 Remove the Idler Arm Ass y 6 Remove the 2 Polyslider Washers 3 7 Remove the Clutc...

Страница 3: ...adjust the tension post position Refer to item 1 2 for the tension arm install the cassette type torque tape JG100A and set to the PLAY mode 2 Confirm that the left hand side tension value of the torq...

Страница 4: ...ng press both VOL DOWN key on the set and the channel button 4 on the remote control simultaneously and adjust the Tracking button until the arising to the down of the Head Switching Pulse becomes 6 5...

Страница 5: ...ton 1 on the remote control 4 Press the VOL UP DOWN button on the remote control until the white 25 is slightly brilliant 4 15 SUB COLOR TV 1 Receive the color bar pattern RF Input 2 Connect the oscil...

Страница 6: ...AIWA VX T1480 OVD 5 Deck Alternative Parts Cont d...

Страница 7: ...AIWA VX T1480 OVD 5 Deck Alternative Parts Cont d Earphone Diagram...

Страница 8: ...0 S5 OP6 004 860 PULLEY LDM 5 1 361 S5 OP8 002 610 SPR C PULLEY 1 362 S5 OA2 000 650 ARM IDLER ASSY 1 363 S5 OP8 002 700 SPR LEVER TENSION 1 364 S5 OA2 000 640 CLUTCH GEAR T ASSY 1 365 S5 OA2 000 630...

Страница 9: ...AIWA VX T1480 Chroma Diagram...

Страница 10: ...AIWA VX T1480 CRT Diagram...

Страница 11: ...AIWA VX T1480 Deflection Diagram...

Страница 12: ...AIWA VX T1480 Microcontroller Diagram...

Страница 13: ...AIWA VX T1480 Head Amp Diagram...

Страница 14: ...AIWA VX T1480 IF PCB Diagram...

Страница 15: ...AIWA VX T1480 Operations Diagram 1...

Страница 16: ...AIWA VX T1480 Operations Diagram 2 Audio Amp Diagram...

Страница 17: ...AIWA VX T1480 Power Diagram TV...

Страница 18: ...AIWA VX T1480 Power Diagram VCR...

Страница 19: ...AIWA VX T1480 Teletext Diagram...

Страница 20: ...AIWA VX T1480 Y C Diagram...

Страница 21: ...AIWA VX T1480 Tuner Audio Diagram...

Страница 22: ...AIWA VX T1480 Waveforms...

Страница 23: ...AIWA VX T1480 Wiring Diagram...

Страница 24: ...AIWA VX T1480 System Control Servo Diagram...

Страница 25: ...IC502 DC7 7V Does RY501 work Check P CON 5V line Check IC502 D511 and D512 Check IC502 Check pins 62 and 63 of IC101 and peripheral circuit Check IC506 Q507 and the peripheral circuit Check Q504 RY50...

Страница 26: ...RN ON 2 Is CP810 inserted Is the voltage at C507 about 160V Insert CD810 Check the circuit between F501 C507 and R501 Check IC501 and the peripheral circuit Yes Yes Yes Yes No No No No Replace F501 Re...

Страница 27: ...peripheral circuit Check Q353 and peripheral circuit Is the voltage at pin 29 of IC601 changed from DC10 8V to DC9 9V when pressing VOLUME UP or DOWN key Yes Yes Is the voltage at pin 1 corrector of...

Страница 28: ...V line Adjust Brightness and Contrast Is the voltage at pin 17 of IC601 DC9V Is the voltage at pin 41 of IC601 DC5V Is the voltage at pin 8 38 of IC601 DC5V Is the signal at pin 12 13 and 14 of IC601...

Страница 29: ...put Is the waveform 12 13 and 14 of IC601 normal Is the waveform at pin 42 of IC601 normal Is the waveform at pin 40 of IC601 normal Is the color signal received Is the color set to minimum NO COLOR R...

Страница 30: ...it of IC601 Check peripheral circuit of IC101 Check R452 and FB401 Is the normal signal at pin 4 of IC 401 input Is the normal signal at pin 38 of IC101 output Is the voltage at pin 6 of IC402 DC25V C...

Страница 31: ...heck TAPE LOADIG LOADING BELT MODE SWITCH DD MOTOR and CYLINDER MOTOR Does it Power off in about 3 seconds Yes No Check REEL SENSOR and REEL BELT Does it Power off in about 6 seconds Yes No Check REEL...

Страница 32: ...Replace CYLINDER MOTOR Check R1059 R1080 and R1058 Replace IC1001 No Yes Yes No No Yes Is the voltage at pin 6 of CP1002 about DC13V In playback is the voltage at pin 3 of CP1002 about DC1 2V In play...

Страница 33: ...o Yes Is AUDIO HEAD scratched Does pin 15 of IC1001 output a 3 0Vp p square wave 3 0V Check AUDIO BLOCK In playback is the voltage at pin 17 of CP1002 about DC1 6V In playback is the voltage at pin 14...

Страница 34: ...MOTOR When a cassette is inserted is the voltage at pin 49 of IC1001 5V When a cassette is inserted is the voltage between pins 1 and 2 of CP1002 When cassette is not inserted is EOT BOT PULSE at EMMI...

Страница 35: ...FRONT LOADING GEARS Defective CASSETTE or FRONT LOADING UNIT In another cassette tape does the same problem appear In covering the infrared sensor is pin 2 and 3 of IC1001 5V When inserting cassette i...

Страница 36: ...of CP1002 and peripheal circuit Check pin 45 of IC1001 lines change IC1001 Check DECK MECHANISM Is the voltage changing at pin 14 of CP1002 Is the voltage changing at pin 12 of CP1002 when you press...

Страница 37: ...k R1059 R1080 R1058 and D1003 No Yes Does PG PULSE signal appear at pin 13 of IC1001 No No No Yes Is the voltage at pin 6 of CP1002 UNREG 12V Does DC5V PULSE signal appear at pin 44 of IC1001 Is the v...

Страница 38: ...age at pin 3 of CP1002 1 2V In playback is the voltage at pin 3 of CP1002 about 1 2V When sloeing CYLINDER is the voltage 3 8V No Yes Replace CYLINDER MOTOR Replace IC1001 No No Yes Yes 5V Is FG Pulse...

Страница 39: ...k IC4101 and CYLINDER UNIT Check CONTROL HEAD No Yes By manual tracking does the DC level at pin 6 of CP4001 change In auto tracking is the voltage at pin 5 of IC1001 more than DC1 85V No No Does the...

Страница 40: ...ROTATING No Yes Replace CAPSTAN BELT No Check REEL SENSOR and that the voltage at pin 10 of CX1003 is DC5V No Does CAPSTAN DD MOTOR rotate Is CAPSTAN BELT OK Yes Does REEL SENSOR PULSE signal appear...

Страница 41: ...No Adjust GUIDE POST height Adjust PG SHIFTER No Does tracking noise appear in the picture Yes Yes Are GUIDE POSTS the right height No Check PB Y circuit Is PG SHIFTER Adjustment 6 5H Yes By adjustin...

Страница 42: ...Yes Is the voltage at pins 12 28 and 54 of IC4001 5V No Yes Check IC4002 and the peripheral cicuit No Replace IC4001 Replace IC4001 No No Yes Is there Y signal at pin 27 of IC4001 and there CHROMA si...

Страница 43: ...7 and the peripheral circuit Replace IC4002 Does FM ENVELOPE appear at TP4002 Does CHROMA signal appear at pin 27 of IC4001 Does COMPOSITE signal appear at pin 16 of IC4002 Does COLOR BURST signal app...

Страница 44: ...p p Is there FM signal at pin 11 of IC4001 140mVp p No Yes Replace IC4001 No Replace IC4002 No Yes Is VIDEO waveform at pin 6 of IC4001 over 500mVp p and are there any noise Yes Yes Check J4501 Is VID...

Страница 45: ...in 29 of IC4001 No No No No Replace IC4101 Check IC4101 and peripheral circuit Replace J4501 Check VIDEO input circuit Does VCR signal appear at pin 53 of IC4002 Does FM signal appear at pin 8 of CP40...

Страница 46: ...igh No No Does AUDIO signal appear at pin 7 of IC5001 Check AUDIO HEAD for debris of stains Check that the connector from AUDIO HEAD is fully inserted to CP4106 Replace IC 5001 If the pin 52 of IC1001...

Страница 47: ...15 of CP1002 5V In playback is the voltage at pin 14 of CP1002 2 5V Replace IC1001 Does DD MOTOR rotate now If not replace DD MOTOR Check pins between 45 and 47 of IC1001 and peripheral circuit Replac...

Страница 48: ...cuit Is there AUDIO signal at pin 14 of IC5001 Check the lead wire and connector to A C HEAD Check the circuit between audio out of Tuner and pin 10 of IC5001 No No Yes Yes No No No Yes Yes Yes Is the...

Страница 49: ...ETTE IN AND DOWN UNIT HAS NO FUNCTIONS No Yes Yes No Check Operation PCB Does VCR operate with the remote control Check IC1001 Check LOADING MOTOR MODE SWITCH and the peripheral parts Does mode indica...

Страница 50: ...CYLINDER UNIT and IC4101 circuit No No Check the circuit from VIDEO input jack to IC4001 from Tuner Pack to IC4001 Check the peripheral circuit of Q4007 Q4009 Replace IC4001 Replace IC4101 RECORDING...

Страница 51: ...uit Replace IC6001 and check peripheral circuits Check 9V and 5V line Check Q6002 Is there VIDEO signal at pin 20 of IC6001 Is defect present when replacing the IF PCB Is the voltage at pin 6 of TU600...

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