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AIWA VX-T1480
Recommended Safety Parts
Item
Part No.
Description
M101
S5-96P-480-010
MOTOR, LOAD(1)
M2001
S5-94J-980-040
CAPSTAN DD UNIT SP39BD 1
M2003
S5-89V-110-040
MICRO MOTOR EP14BA
R1042
87-029-165-060
RES, FUSE 2.7 - 1W
UN4001
S4-841-1B5-000
CYLINDER UNIT ASS'Y
IC1002
S0-7S0-902-9A0
JC, OEC9029A
TU6001
S1-447-070-200
TUNER UHF UE25-B01
R445
87-022-304-010
RES, M/O 1.5K - 3W
R446
87-022-304-010
RES, M/O 1.5K - 3W
R447
56-158-268-0J0
RES, FUSE 68 - 1/2W
R449
S5-K2C-E8R-2K0
RES, CEM 8.2 - 7W
R450
87-029-160-010
RES, FUSE 2.2 - 1W
R452
S6-358-11R-8J0
RES, FUSE 1.8 - 1W
R501
S5-K20-E2R-2K0
RES, CEM 2.2 - 7W
R505
S3-X28-B33-3J0
R, M/O 33K - 3W
R508
S3-X28-D47-3J0
RES, M/O 47K - 5W
R512
S3-U18-182-2J0
RES, M/O 8.2K - 1W
R513
87-022-623-010
RES, M/O 15 - 2W
R517
S6-148-12R-2J0
RES, FUSE 22 - 1W
R531
S3-X18-AR5-6J0
RES, M/O 0.56 OHM
R538
S0-11K-215-5J0
RES, 1.5M - 1/2W
R598
87-029-374-010
RES, FUSE 47 - 1/4W
C502
S0-JBB-07H-3K0
CAP, CER 0.0022 - 2KV
C503
S0-JBB-07H-3K0
CAP, CER 0.0022 - 2KV
C505
S2-222-B22-4K0
CMP, 0.22 - 250V
C506
S2-222-B10-4K0
CMP, 0.1 - 250V
C515
S0-E7T-B01-0M0
CAP, E 1-160V
C529
SB-393-0MH-3M0
CAP, CER 0.0022 - 250V
C530
SB-393-0MQ-2K0
CAP, CER 470PF - 250V
C533
SB-393-0M1-2K0
CAP, CER 100PF - 250V
C546
SB-393-0MH-3M0
CAP, CER 0.0022 - 250V
D411
S2-8T1-0EL-S60
DIODE, 10ELS6TA1
D501
S2-BTR-M11-C00
DIODE, RM11C
D502
S2-BTR-M11-C00
DIODE, RM11C
D503
S2-BTR-M11-C00
DIODE, RM11C
D504
S2-BTR-M11-C00
DIODE, RM11C
D508
S2-8TE-QS0-400
DIODE, 11EQS04TA1
D509
S2-8T1-0EL-S60
DIODE, 10ELS6TA1
D510
S2-811-5DF-600
DIODE,1SDF6-FC
D512
S2-8T1-DQ0-900
DIODE, 21DQ09-TA2B1
D519
S2-8T1-DQ0-900
DIODE, 21DQ09-TA2B1
IC401
S0-5SD-840-300
IC, TA8403K
IC501
S0-ED0-460-500
lC, TDA4605-3
IC502
S0-Q09-780-500
IC, NJM7805FD
IC506
S0-025-004-500
PHOTO, COUPLER TLP621 (GR)
Q406
SD-UQ0-208-900
TR, 2SD2089
Q500
S4-1FK-239-700
TR, 2SK2397 - 01
Q502
SA-3T1-371-A00
TR, 2SA1371
Q503
SC-300-416-000
TR, 2SC4160
Q511
SB-WT0-092-600
TR, 2SB926 (S,T)
Q516
SD-70D-239-600
TR, 2SD2396
L501
S2-9K0-000-010
COIL, LINE FILTER RB-20871
L502
S2-9K0-000-010
COIL, LINE FILTER RB-20871
FB401
S4-321-300-9F0
TR, 3213009
T501
S4-813-502-2W0
TR, 8135022W
F501
S8-0PT-040-020
FUSE, 4A-250V T
F502
S8-0PT-1R6-020
FUSE, 21801.6
RY501
S5-600-101-140
RELAY SDT-SS-109DM
ICP502
S8-3PC-030-020
MICRO FUSE, 251003
ICP503
S8-3PC-050-020
MICRO FUSE, 251005
ICP504
S8-3PC-030-020
MICRO FUSE, 251003
ICP505
S8-3PC-010-020
MICRO FUSE, 251001
R802
87-A00-164-060
R, M/O 12K - 2W
R805
87-A00-164-060
R, M/O 12K - 2W
R810
87-A00-164-060
R, M/O 12K - 2W
Q804
89-314-736-080
TR, 2SC1473A - TA
Q805
89-314-736-080
TR, 2SC1473A - TA
Q806
89-314-736-080
TR, 2SC1473A-TA
J801
S6-6X1-200-140
SOCKET, CRT HPS320
SW501
S5-302-050-010
SW, PLUSSDDFC3O56A
L503
S2-8Q1-400-180
COIL, DEGAUSS 8Q140018
CD501
S2-066-358-070
CORD, AC 1206635807
V801
S9-8Y1-404-640
CRT, W/DY14" A34JXV70X06N
Disassembly Instructions
1-4: LOCATION OF PRINTED CIRCUIT
BOARDS
(Refer to Fig. 1-4)
1
CAUTION: BEFORE ATTEMPTING TO
REMOVE OR REPAIR ANY PCB, UNPLUG
1
THE POWER CORD FROM THE AC SOURCE.
1
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 in the direction of the arrow.
Fig. 1-5
1-6: TOP SHIELD PLATE AND BOTTOM
SHIELD PLATE
(Refer to Fig. 1-6)
1. Remove the 4 screws (1).
2. Remove the Top Shield Plate in the direction
of arrow (A).
3. Remove the screw (2).
4. Remove the Bottom Shield Plate in the
direction of arrow (B).
Fig. 1-6
1-7: FRONT LOADING UNIT 6, CHASSIS
SECTION, JACK PLATE AND VCR MAIN PCB
(Refer to Fig. 1-7-A)
1. Remove the screw (1).
2. Remove the screw (2).
3. Remove the screw (3).
4. Remove the Front Loading Unit 6 in the
direction of arrow (A).
5. Remove the 3 screws (4).
6. Remove the 2 screws (5).
7. Remove the Chassis Section in the direction
of arrow (B).
8. Remove the 2 screws (6).
9. Unlock the 2 supports (7) and remove the
Jack Plate in the direction of arrow (C).
10.Unlock the support (8) and remove the VCR
Main PCB.
NOTE
When installing the Front Loading Unit 6, align
the timing marks and pull the Cassette Holder
Ass'y in the direction of arrow (D). (Refer to Fig.
1-7-B)
Fig. 2-1
2-2: TOP BRACKET / TAPE PIECE GUIDE
(Refer to Fig. 2-2)
1. Unlock the 2 supports (1).
2. Remove the Tape Piece Guide.
3. Unlock the 4 supports (2).
Fig. 1-7-A
4. Remove the Top Bracket.
5. Remove the Side Bracket R1 and Side
Bracket L.
6. Unlock the support (3).
7. Remove the Joint Gear.
8. Remove the Bracket R Spring.
Fig. 1-7-B
2. REMOVAL OF DECK PARTS
Fig. 2-2
2-1: LINK GEAR (R) / CAM GEAR (Refer to
Fig. 2-1)
2-3: LINK ASS'Y 2 (Refer to Fig. 2-3)
1. After removing in the direction (A) of Link
1. Unlock the support (1).
Ass'y 2, remove the Link Ass'y 2 in the
2. Remove the BOT Sensor Cover and BOT
direction (B).
Reflector.
3. Unlock the 3 supports (2).
NOTE
4. Remove the Side Bracket R2 and Spring
Install the (B) first, then install the (A).
Earth.
5. Remove the Flap Lever, Link Gear (R), Cam
Gear Ass'y and BOT Lever.
NOTES
When installing the Link Ass'y 2 and Link Gear
(R), align the timing Marks.
Fig. 2-3
2-4: CASSETTE SIDE R (Refer to Fig. 2-4)
1. Unlock the 2 supports (1).
2. Remove the Cassette Side R.
3. Remove the Pack Spring.
4. Remove the Locker Spring.
5. Unlock support (2).
6. Remove the Locker R.
Fig. 2-4
2-5: CASSETTE SIDE L (Refer to Fig. 2-5)
1. Unlock the 2 supports (1).
2. Remove the Cassette Side L.
3. Remove the Pack Spring.
4. Remove the Locker Spring.
5. Unlock the support (2).
6. Remove the Locker L.
Fig. 2-5
2-6: BRAKE BRACKET (Refer to Fig. 2-6)
1. Remove the Main Brake Spring, S-S Brake
Spring, Joint Arm Spring and T-S Brake
Spring.
2. Remove the 2 screws (1).
3. Remove the screw (2).
4. Remove the Brake Bracket.
5. Remove the Sub Brake S, Sub Brake T, Main
Brake S Ass'y and Main Brake T Ass'y.
6. Remove the Joint Arm.
7. Remove the Reflector LED 2.
Fig. 2-6
2-7: TENSION BAND (Refer to Fig. 2-7)
1. Remove the Tension Arm Spring 1.
2. Remove the Tension Arm Spring 2.
3. Remove the Tension Adjust.
4. Remove the Tension Arm Ass'y.
5. Remove the Tension Band Ass'y.
6. Remove the Tension Lever 2 Ass'y.
Continues on next page.

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Summary of Contents for Aiwa VX-T1480

  • Page 1 AIWA VX-T1480 9. Unlock the 2 supports (7) and remove the 4. Remove the Locker Spring. Disassembly Instructions Recommended Safety Parts Jack Plate in the direction of arrow (C). 5. Unlock support (2). 10.Unlock the support (8) and remove the VCR 6.
  • Page 2 AIWA VX-T1480 Disassembly Cont’d 2-14: MAIN CAM (Refer to Fig. 2-14) 2-16: INCLINED T ASS’Y / INCLINED S ASS’Y 2. Flip up the sides of the Rubber Cap in the 1. Remove the Loading Lever. (Refer to Fig. 2-16) direction of the arrow and remove one side of 2.
  • Page 3 AIWA VX-T1480 Mechanical Adjustments FORWARD button and the reel disk will begin to 3. Trigger with SW pulse and observe the turn. envelope. (Refer to Fig. 2-1-A) 4. Adjust the guide roller height while observing 1-5: CONFIRMATION OF REWIND TORQUE SERVICING PREPARATION the envelope, and make the envelope flat.
  • Page 4 AIWA VX-T1480 Adjustments Cont’d (If the previous adjustments don’t work well:) 3-3: AFT COIL Components Location (TV) CONDITION 1. Connect CH-1 on the oscilloscope to TP4001 MODE-STOP azimuth of the A/C head. Adjust the height so and CH-2 to TP4501.
  • Page 5 4. Adjust the VR502 until the DC voltmeter is NOTE 4-7: VERTICAL LINEA 100V ± 0.5V.(VX-T1480) or 103V ± 0.5V (VX- 4. Press the VOL. UP/DOWN button on the Adjust after performing adjustments in section 5-3. 1. Receive the monochrome pattern.
  • Page 6 AIWA VX-T1480 OVD-5 Deck Alternative Parts Cont’d...
  • Page 7 AIWA VX-T1480 Earphone Diagram OVD-5 Deck Alternative Parts Cont’d...
  • Page 8 AIWA VX-T1480 Deck Exploded Parts View Deck Parts List Cont’d Item Part No. Description S5-OP2-002-170 REEL T S5-OP4-004-020 CATCHER, P52 S5-OP6-004-65O SUBBRAKE S S5-OP8-002-530 SPR, S-S BRAKE S5-OP2-002-470 ARM, JOINT S5-OP8-002-620 SPR, JOINT ARM S5-OA6-001-570 SUB BRAKE T ASSY S5-OP8-002-540...
  • Page 9 AIWA VX-T1480 Chroma Diagram...
  • Page 10 AIWA VX-T1480 CRT Diagram...
  • Page 11 AIWA VX-T1480 Deflection Diagram...
  • Page 12 AIWA VX-T1480 Microcontroller Diagram...
  • Page 13 AIWA VX-T1480 Head Amp Diagram...
  • Page 14 AIWA VX-T1480 IF PCB Diagram...
  • Page 15 AIWA VX-T1480 Operations Diagram 1...
  • Page 16 AIWA VX-T1480 Operations Diagram 2 Audio Amp Diagram...
  • Page 17 AIWA VX-T1480 Power Diagram (TV)
  • Page 18 AIWA VX-T1480 Power Diagram (VCR)
  • Page 19 AIWA VX-T1480 Teletext Diagram...
  • Page 20 AIWA VX-T1480 Y/C Diagram...
  • Page 21 AIWA VX-T1480 Tuner Audio Diagram...
  • Page 22 AIWA VX-T1480 Waveforms...
  • Page 23 AIWA VX-T1480 Wiring Diagram...
  • Page 24 AIWA VX-T1480 System Control Servo Diagram...
  • Page 25: Power Does Not Turn On

    (TV SECTION) POWER DOES NOT TURN ON (1) When turning on the Check P.CON 5V line. Power Switch, does the LED light ? Is the voltage at pin 1 Check IC502, D511 and D512. of IC502 DC7.7V ? Is the voltage at pin 3 of Check IC502.
  • Page 26 POWER DOES NOT TURN ON (2) Is CP810 inserted ? Insert CD810. Check the circuit between Is the voltage at C507 Is F501 broken ? about 160V ? F501, C507 and R501. Check IC501 and the Q500 bad ? peripheral circuit. Replace F501.
  • Page 27 GOOD PICTURE BUT NO SOUND Is the voltage at CP301 Check speaker and changed with the volume EARPHONE PCB. up or down key ? Is FUSE RESISTOR Is the voltage at BASE of Check Sound +B line. Q351 and Q352 DC9V ? (R517) broken ? Replace FUSE RESISTOR (R517).
  • Page 28 NO PICTURE Are the Brightness and Adjust Brightness and Contrast. Contrast set to minimum ? Is the voltage at pin 3 of Check P.CON 9.6V line. IC601 DC9V ? Is the voltage at pin Check CHROMA 9V line. 17 of IC601 DC9V ? Is the voltage at pin 41 of Check D607.
  • Page 29 NO COLOR Is the color set to Adjust the color. minimum ? Is the color signal Receive the color signal. received ? Is the waveform at pin Check peripheral circuit of X601. 40 of IC601 normal ? Is the waveform at pin 42 Check peripheral circuit of VIDEO of IC601 normal ? out line and Q602.
  • Page 30 ONLY A LINE APPEARS Is the normal signal at Check peripheral circuit of IC601. pin 4 of IC 401 input ? Is the normal signal at Check peripheral circuit of IC101. pin 38 of IC101 output ? Is the voltage at pin 6 of Check R452 and FB401.
  • Page 31 (VCR SECTION) PLAY SHUTS OFF Insert a cassette and push PLAY button. Check TAPE LOADIG, Does it Power off in LOADING BELT,MODE SWITCH, about 3 seconds? DD MOTOR and CYLINDER MOTOR. Does it Power off in Check REEL SENSOR and about 6 seconds? REEL BELT.
  • Page 32 CYLINDER NOT ROTATING DURING PLAYBACK AND RECORDING Is the voltage at pin 6 of Check UNREG 12V line CP1002 about DC13V ? of Main PCB. In playback, is the voltage at pin 3 of Replace CYLINDER MOTOR. CP1002 about DC1.2V ? In playback, is the voltage at pin 44 of IC1001 DC5V Pulse and...
  • Page 33: Audio Shakes

    AUDIO SHAKES Is AUDIO HEAD Replace AUDIO HEAD. scratched ? Does pin 15 of IC1001 Replace CAPSTAN DD. output a 3.0Vp-p square wave ? 3.0V In playback, is the voltage at pin 14 of CP1002 2.8V ? Check peripheral components Is the voltage at pin 14 of of IC1001.
  • Page 34: Cassette Tape Is Not Accepted

    CASSETTE TAPE IS NOT ACCEPTED Does WORM GEAR Check WORM GEAR of of FRONT LOADING FRONT LOADING UNIT. UNIT activate ? When cassette is not inserted, is EOT BOT Check EOT, BOT, PHOTO PULSE at EMMITTER of SENSOR, pins 2 and 4 of IC1001. Q1055, Q1056 5V ? When a cassette is inserted, is the voltage between pins...
  • Page 35 WHEN INSERTING CASSETTE, IT EJECTS IMMEDIATELY In another cassette tape Defective CASSETTE or does the same problem FRONT LOADING UNIT. appear ? In covering the infrared Replace EOT/BOT PHOTO sensor, is pin 2 and 3 of TRANSISTORS. IC1001 5V ? When inserting cassette, Check R1010.
  • Page 36: Ff/Rew Do Not Work

    FF/REW DO NOT WORK When the FF/REW is pushed, Check pin 74 of IC1001 lines change does the PULSE appear at IC1001. pin 51 of IC1001 ? Is the voltage changing at Check pin 12 of CP1002 and pin 12 of CP1002 when peripheal circuit.
  • Page 37: Tape Loading Is Ok, But Unloads Immediately

    TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY Is the voltage at pin Does CYLINDER rotate ? Check Power circuit. 6 of CP1002 UNREG 12V ? Does DC5V PULSE signal In playback, is the appear at pin 44 of IC1001 ? voltage at pin 3 of Is the voltage at pin 46 of CP1002 1.2V ?
  • Page 38: Playback Picture Jitters Horizontally

    PLAYBACK PICTURE JITTERS HORIZONTALLY Is FG output level at pin 5 Replace CYLINDER MOTOR. of CP1002 about 5V? Is the voltage at pin 3 of Replace IC1001. CP1002 1.2V? Replace CYLINDER MOTOR. PLAYBACK PICTURE SHAKES PLAYBACKPICTURE SHAKES Is FG Pulse output level at Replace CYLINDER MOTOR.
  • Page 39: Auto Tracking Does Not Operate

    AUTO TRACKING DOES NOT OPERATE By manual tracking, Check IC4101 and does the DC level at pin 6 CYLINDER UNIT. of CP4001 change? Does the CTL PULSE In auto tracking, is the (about 1.0Vp-p) appear Check CONTROL HEAD. voltage at pin 5 of IC1001 at pin 19 of IC1001? more than DC1.85V? 1.0Vp-p...
  • Page 40: When Playback,Fast Forward Or Rewind Mode Is Activated, Unit Stops Immediately

    WHEN PLAYBACK,FAST FORWARD OR REWIND MODE IS ACTIVATED, UNIT STOPS IMMEDIATELY Refer to section "CAPSTAN Does CAPSTAN DD DD MOTOR NOT ROTATING" MOTOR rotate? Is CAPSTAN BELT OK? Replace CAPSTAN BELT Check REEL SENSOR and that Does REEL SENSOR PULSE the voltage at pin 10 of CX1003 signal appear at pin 69 is DC5V.
  • Page 41: Playback Picture Jitters Vertically

    PLAYBACK PICTURE JITTERS VERTICALLY Does tracking noise appear in the picture? By adjusting the manual tracking Check P/B ENVELOPE. UP/DOWN buttons,will the noise disappear in the picture? Are GUIDE POSTS Adjust GUIDE POST height. the right height? Is PG SHIFTER Adjust PG SHIFTER.
  • Page 42: No Playback Picture

    NO PLAYBACK PICTURE Is E-E appearing on the Is the voltage at pins 12,28 Check Power circuit. Monitor TV? and 54 of IC4001 5V? Check 5V line. Is there PB Y/C signal at Check IC4101 and the TP4002? connection of the CYLINDER. Is there FM Y signal at Check Q4001,Q4016,Q4004 and pin 11 of IC4001and there...
  • Page 43 NO COLOR DURING PLAYBACK Does FM ENVELOPE Check IC4101 and HEAD AMP appear at TP4002? BLOCK. Does CHROMA signal Check C4067 and the peripheral appear at pin 27 of IC4001? circuit. Does COMPOSITE Replace IC4002 signal appear at pin 16 of IC4002? Does COLOR BURST signal appear in the...
  • Page 44 PLAYBACK PICTURE NOISY (EVEN AFTER CLEANING HEADS) Is FM signal at TP4002 Replace CYLINDER MOTOR. more than 200mVp-p? Check Q4001,Q4016,Q4004 Is there FM signal at pin 11 of and the peripheral circuit. IC4001 140mVp-p? Is VIDEO waveform at Check pins 6 and 8 of IC4002 pin 6 of IC4001 over and the peripheral circuit.
  • Page 45: No Color During Self Recording And Playback

    NO COLOR DURING SELF RECORDING AND PLAYBACK Does VCR signal Replace J4501. appear at pin 53 of Check VIDEO input circuit. IC4002 ? Does CHROMA Replace IC4001 signal appear at pin 29 of IC4001 ? Does FM signal Check Q4005, Q4006 and peripheral appear at pin 8 of circuit.
  • Page 46: No Normal Audio On Playback

    NO NORMAL AUDIO ON PLAYBACK Refer to section "NO E-E". Does audio appear on E-E ? If the pin 52 of IC1001 is not High, Is the voltage at pin 17 replace the IC1001. of IC5001 High ? Does AUDIO signal Check R5013, R5014 and peripheral appear at pin 7 of circuit.
  • Page 47 CAPSTAN DD MOTOR NOT ROTATION In playback, is the Check POWER circuit. voltage at pin 13 of CP1002 13V ? Is the voltage at pin 15 of CP1002 5V ? In playback, check the voltage at pin 17 of Replace IC1001. CP1002 is 2V or at pin 50 of IC1001 is 0V ? In playback, is the...
  • Page 48: Audio Can Not Be Recorded

    AUDIO CAN NOT BE RECORDED Is BIAS level O.K at Is the voltage at pin 20 Check POWER circuit. T5001 ? of IC5001 9.2V ? T5001 is broken or shorted. Check T5001 and peripheral circuit. Is there AUDIO Check the circuit between audio signal at pin 10 or 12 out of Tuner and pin 10 of IC5001.
  • Page 49: Cassette In And Down, Unit Has No Functions

    CASSETTE IN AND DOWN, UNIT HAS NO FUNCTIONS Does mode indicator Check LOADING MOTOR, MODE appear in Display ? SWITCH and the peripheral parts. Does VCR operate with Check IC1001. the remote control ? Check Operation PCB.
  • Page 50: Recording Mechanism Works, But No Video Recorded From Input Jack Or Tuner

    RECORDING MECHANISM WORKS, BUT NO VIDEO RECORDED FROM INPUT JACK OR TUNER Check the circuit from VIDEO input Does VIDEO signal jack to IC4001, from Tuner Pack to appear at pin 51 or 53 IC4001. of IC4001 ? Is there VIDEO signal at pin 6 of IC4002 and Check the peripheral circuit of Q4007, Does VIDEO signal appear at...
  • Page 51 NO E-E (NO VIDEO AND AUDIO FROM TUNER) Is the voltage at pin 6 of Check Power PCB. TU6001 9V ? Is defect present when Is defect present when Check TU6001 and the peripheral replacing the IF PCB ? replacing the TU6001. circuit.

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