Aiwa VX-T1480 Schematic

AIWA VX-T1480

Recommended Safety Parts

Item Part No. Description

M101 S5-96P-480-010 MOTOR, LOAD(1) 1 M2001 S5-94J-980-040 CAPSTAN DD UNIT SP39BD 1 M2003 S5-89V-110-040 MICRO MOTOR EP14BA 1 R1042 87-029-165-060 RES, FUSE 2.7 - 1W UN4001 S4-841-1B5-000 CYLINDER UNIT ASS’Y 1 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)

CAUTION: BEFORE 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 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. 1-7-A

Fig. 1-7-B

2. REMOVAL OF DECK PARTS

2-1: LINK GEAR (R) / CAM GEAR (Refer to

Fig. 2-1)

1. Unlock the support (1).

2. Remove the BOT Sensor Cover and BOT Reflector.

3. Unlock the 3 supports (2).

4. Remove the Side Bracket R2 and Spring 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. 2-1 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).

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. 2-2 2-3: LINK ASS’Y 2 (Refer to Fig. 2-3)

1. After removing in the direction (A) of Link Ass’y 2, remove the Link Ass’y 2 in the direction (B).

NOTE

Install the (B) first, then install the (A).

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.

AIWA VX-T1480

Disassembly Cont’d

Fig. 2-7 NOTES

1. Install the Tension Band Ass’y without twisting it.

2. Oil the area marked with A in Fig. 2-7. 2-8: REEL DISK (Refer to Fig. 2-8)

1. Remove the Reel Disk S and Reel Disk T.

2. Remove the 2 polyslider washers.

NOTES

1. Installation of Reel Disk after performing step 1, 2 and 3 in section 2-7 of DISASSEMBLY INSTRUCTIONS.

2. The Height Adjustment washers are sometimes attached to the back of the Reel Disk.

3. Clean the Reel Disk Shaft and put in height adjusting washers.

4. Be careful not to damage the Tension Band Ass’y at the time of removal and installation.

5. Be careful not to scratch the Reel Disk Shaft with the polyslider washer or the tool at the time of removal and installation.

6. After oiling the Reel Disk Shaft, install the new Reel Disk S and Reel Disk T again.

7. After installation, adjust the height of the Reel Disk. (Refer to item 1-1 of MECHANICAL ADJUSTMENTS)

8. After installation, adjust and confirm the tension post position. (Refer to item 1-2 of MECHANICAL ADJUSTMENTS)

Fig. 2-8 2-9: PINCH ROLLER / CASSETTE OPENER

(Refer to Fig. 2-9)

1. Unlock the support (1).

2. Remove the Pinch Roller.

3. Remove the screw (2).

4. Unlock the 2 supports (3).

5. Remove the Cassette Opener.

6. Remove the Spring P5 and Arm P5 Ass’y.

7. Remove the Cam Gear, Polyslider Washer 4, Spring Cam Pinch and Cam Pinch Roller.

8. Remove the Polyslider Washer 5 and Cam P5.

NOTES

1. Do not touch the Pinch Roller. (Use gloves.)

2. When installing the Cam P5, Cam Pinch Roller and Cam Gear, align the timing marks.

Fig. 2-9 2-10: AUDIO CONTROL HEAD

(Refer to Fig. 2-10)

1. Disconnect the following connector: (CP4106 6 pins) on the Head Amp PCB.

2. Remove the 3 screws (1).

3. Remove the 3 Audio Control Head Springs.

4. Remove the Audio Control Head.

NOTES

1. Do not touch the head by any means when replacing the Audio Control Head. (Use gloves.)

2. After replacement, confirm the following adjustments.

a. MECHANICAL ADJUSTMENTS: ITEM 2-2 b. MECHANICAL ADJUSTMENTS: ITEM 2-3

Fig. 2-10 2-11: CYLINDER UNIT (Refer to Fig. 2-11)

1. Disconnect the following connectors: (CP4101 4 pins and CP4102 5 pins) on the Head Amp PCB.

2. Remove the Joint Screw, then remove the Azimuth Spring.

3. Remove the 2 screws (1), then remove the Polyslider Washer and Cylinder Unit from the Main Chassis.

Fig. 2-11 2-12: PLATE BOTTOM (Refer to Fig. 2-12)

1. Remove the Capstan Belt.

2. Remove the 2 screws (1).

3. Remove the 3 screws (2).

4. Remove the Mode Switch.

5. Remove the Tension Lever Spring.

6. Remove the Plate Bottom.

NOTE

When installing the Mode Switch, align the timing position.

Fig. 2-12 2-13: CENTER PULLEY (Refer to Fig. 2-13)

1. Remove the 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 Clutch Gear T Ass’y and Clutch Gear S Ass’y.

Fig. 2-13

2-14: MAIN CAM (Refer to Fig. 2-14)

1. Remove the Loading Lever.

2. Remove the Main Brake Lever.

3. Remove the Capstan Brake Spring.

4. Remove the Capstan Brake Ass’y.

5. Remove the Main Rod Spring.

6. Remove the Tension Holder.

7. Remove the Tension Lever.

8. Remove the Main Cam.

9. Remove the Middle Gear.

10. Remove the Main Rod Ass’y.

NOTES

1. When installing the Main Rod Ass’y, install side (B) first, then install side (A).

2. When installing the Loading Lever, align the timing marks.

Fig. 2-14 2-15: CAPSTAN DD UNIT (Refer to Fig. 2-15)

1. Remove the screw (1)

2. Disconnect the CP4105 9 pins.

3. Remove the 3 screws (2).

4. Remove the Capstan DD Unit.

NOTE

Use the specified screw to hold the Capstan DD Unit.

Fig. 2-15

2-16: INCLINED T ASS’Y / INCLINED S ASS’Y

(Refer to Fig. 2-16)

1. Remove the 2 Slider Loadings.

2. Remove the Inclined T Ass’y and Inclined S Ass’y.

3. Remove the Loading Gear T Ass’y.

4. Remove the Loading Gear S Ass’y.

NOTE

When installing the Inclined T Ass’y and Inclined S Ass’y, align the timing marks.

Fig. 2-16

3. REMOVAL OF ANODE CAP

Read the following NOTED items before starting work. * After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap’s potential voltage. * Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged.

REMOVAL

1. Follow the steps as follows to discharge the Anode Cap. (Refer to Fig. 3-1.) Connect one end of an Alligator Clip to the metal part of a flat-blade screwdriver and the other end to ground. While holding the plastic part of the insulated Screwdriver, touch the support of the Anode with the tip of the Screwdriver. A cracking noise will be heard as the voltage is discharged.

Fig. 3-1

2. Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support. (Refer to Fig. 3-2.)

Fig. 3-2

3. After one side is removed, pull in the opposite direction to remove the other.

NOTE

Take care not to damage the Rubber Cap.

INSTALLATION

1. Clean the spot where the cap was located with a small amount of alcohol. (Refer to Fig. 3-3.)

Fig. 3-3 NOTE

Confirm that there is no dirt, dust, etc. at the spot where the cap was located.

2. Arrange the wire of the Anode Cap and make sure the wire is not twisted.

3. Turn over the Rubber Cap. (Refer to Fig. 3-4.)

Fig. 3-4

4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 3-5.

Fig. 3-5

5. Confirm that the Support is securely connected.

6. Put on the Rubber Cap without moving any parts.

AIWA VX-T1480

Mechanical Adjustments

SERVICING PREPARATION

How to use the servicing fixture

1. Remove the VCR Main PCB from the Deck Chassis.

2. Connect as shown in the figure using the Service Fixture.

• Connect the VCR Main PCB to the Mode Switch with the cable JG150.

• Connect the VCR Main PCB to the Head Amp PCB with the cable JG158 and JG159.

• Connect the VCR Main PCB to the TV Main PCB with the cable JG162A and JG 162H.

• Connect the VCR Main PCB to the CRT PCB with the cable JG162Y.

• Connect the VCR Main PCB to the FE Head with the cable JG163.

3. Short circuit between TP1001 and Ground with the cable JG154. (Refer to MAJOR COMPONENTS LOCATION GUIDE)

4. The EOT, BOT and Reel Sensor do not work at this moment.

5. At that time, the STOP/EJECT button is available to insert and eject the Cassette Tape.

INSTRUCTIONS

1. Unplug the AC cord once and the clock will be non-setting.

2. Turn on the POWER and set the VOLUME to minimum.

NOTE:

If the Auto Set Up Function is working, the unit cannot be operated. In this case, release the Function or wait until the Function goes to the end.

3. Press the VOL. DOWN button on the set and the Channel button (6) on the remote control simultaneously. The Fig. 1 appears on the display.

4. Press the SET +/- button on the remote control to modify the address and check the data.

(Refer to Table 1)

5. After checking, turn off the Power.

(If the wrong data is input)

6. Press the SET +/- button on the remote control to set to the address of the wrong data, then press the ENTER button. The data will bink. (Refer to Fig. 1)

7. Press the SET +/- button on the remote control to set to the correct data, then press the ENTER button. (Refer to Table 1)

8. Repeat the above steps 6 and 7 and input the data into the each Address.

9. After the data input, turn off the Power.

Fig. 1

1. CONFIRMATION AND ADJUSTMENT

Read the following NOTED items before starting work.

• Place an object which weighs between 350g and 500g on the Cassette Tape to keep it steady when you want to make the tape run without the Front Loading Unit 6. (Do not place an object which weighs over 500g.) Reel Disk (S)

• When you activate the deck without the Front Loading Unit 6, short circuit between TP1001 and Ground. In this condition the BOT/EOT/ Reel Sensor will not function.

1-1: CONFIRMATION AND ADJUSTMENT OF

REEL DISK HEIGHT

1. Turn on the power and set to the STOP mode.

2. Set the master plane (JG022) and reel disk height adjustment jig (JG024) on mechanism framework, taking care not to scratch the drum, as shown in Fig. 1-1-A.

3. Confirm that the reel disk is lower than “A” of the reel disk height adjustment jig (JG024) on the master plane and higher than “B” as shown in Fig. 1-1-B. If it is not, adjust to less than 7.5mm±0.2mm with the height adjustment washer.

4. Perform the same adjustment for other reel.

Fig. 1-1-A

Fig. 1-1-B 1-2: CONFIRMATION AND ADJUSTMENT OF

TENSION POST POSITION

1. Turn on the power and set to the PLAY mode adjust the Tension so that the Tension Post is at the position of 0.3mm~0.5mm from the Rib. (Refer to Fig. 1-2)

2. Confirm that the video tape is not curling at the flange of P1 post or is not running on flanges.

Fig. 1-2 1-3: CONFIRMATION AND ADJUSTMENT OF

BACK TENSION ON PLAYBACK

1. Load a video tape recorded in standard speed mode. Set the unit to the PLAY mode.

2. Install the tentelometer as shown in Fig. 1-3. Confirm the value is within 20~27gr/cm at this time.

IN CASE OF USING A CASSETTE TYPE TORQUE TAPE.

1. After adjustment, confirm and 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 torque tape is 25~38gr/cm for the standard mode tape.

Fig. 1-3 1-4: CONFIRMATION OF FAST FORWARD

TORQUE

1. Set torque gauge (JG002G) on take-up reel disk, and place unit in FAST FORWARD mode. (Refer to Fig. 1-4)

2. Confirm that torque is more than 400gr/cm.

NOTE

After setting the torque gauge on the reel disk, hold the gauge in place. Push the FAST

FORWARD button and the reel disk will begin to turn.

1-5: CONFIRMATION OF REWIND TORQUE

1. Operate within 4 or 5 seconds after the reel disk begins to turn.

2. Set torque gauge (JG002G) on supply reel disk, and place the unit in REWIND mode. (Refer to Fig 1-4).

3. Confirm that torque is more than 400gr/cm.

NOTE

After setting the torque gauge on the reel disk, hold the gauge in place. Push the REWIND button and the reel disk will begin to turn.

1-6: CONFIRMATION OF REEL BRAKE TORQUE

(Take-Up Reel Brake) (Refer to Fig. 1-4)

1. Set to STOP mode.

2. Set the torque gauge (JG002G) to the takeup reel and turn it counterclockwise.

3. Confirm that it is more than 200gr/cm at that time.

(Supply Reel Brake) (Refer to Fig. 1-4)

1. Set to STOP mode.

2. Set the torque gauge (JG002G) to the supply reel and turn it clockwise.

3. Confirm that it is more than 200gr/cm at that time.

NOTE

Separate the idler from the reel and confirm the brake torque.

Fig. 1-4 2-1: GUIDE ROLLER

NOTE

If the torque value checked is out of tolerance, replace the appropriate parts as follows.

Check Items Replace Parts

1-4 Idler Ass’y or Clutch Ass’y 1-5 Idler Ass’y or Clutch Ass’y 1-6 Main Brake T Ass’y or Main Brake S Ass’y

2. TAPE RUNNING CONFIRMATION AND

ADJUSTMENT

Tape running is adjusted precisely at the factory. Normally, it is not necessary to make adjustments. It is necessary to confirm and make adjustments when the parts of the tape running mechanism are replaced because of extensive usage or failure.

2-1: GUIDE ROLLER

1. Connect CH-1 on the oscilloscope to TP4002 (PB Envelope) and CH-2 to TP4001 (SW Pulse).

2. Set the tracking to manual center position in the following way. Press and hold the tracking auto button more than 2 seconds to set the tracking to center position.

3. Trigger with SW pulse and observe the envelope. (Refer to Fig. 2-1-A)

4. Adjust the guide roller height while observing the envelope, and make the envelope flat. Adjust the envelope so that the flatness will not be affected even when the tracking control button is pressed. (Use the adjustment screwdriver JG005).

5. Press and hold the tracking control button and (at the point that the envelope waveform starts to reduce) adjust the envelope so that the A:B ratio is better than 3:2. (Refer to Fig. 2-1-B)

6. Adjust the PG shifter (ELECTRICAL ADJUSTMENTS : ITEM 3-1) in the PLAY mode.

NOTE

After adjustment, confirm and adjust A/C head tilt. (Refer to item 2-2)

Fig. 2-1-A

Fig. 2-1-B 2-2: CONFIRMATION AND ADJUSTMENT OF

A/C HEAD TILT

When the tape is running abnormally, perform the following adjustments.

1. Insert a new tape and play it back.

2. Confirm that there is no crease on the tape between the P4 post and guide roller (R) and the tape is running smoothly. (It is absolutely impossible to get satisfactory sound if the tape is distorted between the A/C head and P4 post.)

3. If the tape still does not run smoothly, turn the screw (1) and adjust the tilt of the A/C head. (Refer to Fig. 2-2)

Fig. 2-2 2-3: ADJUSTMENT OF A/C HEAD HEIGHT

AND AZIMUTH

1. Playback a VHS alignment tape (JG001C) and observe the waveform at the audio output terminal.

2. Turn the screw (2) slowly to change the

AIWA VX-T1480

Adjustments Cont’d

azimuth of the A/C head. Adjust the height so

that the audio output becomes maximum. (Refer to Fig. 2-2)

3. Adjust the screw 3, (Refer to Fig. 2-2) until the height of the A/C head reaches the position against the tape as shown in Fig. 2-3.

4. When the control head height is not correct. (When you must turn the screw more than 45 degrees), Turn all of the screws (1), (2) and (3) to the same degrees. Then confirm the angle of the audio/control head and adjust again.

Fig. 2-3 2-4: TAPE RUNNING ADJUSTMENT

1.Adjust the height of reel disk.

(Refer to item 1-1)

2.Confirm and adjust tension post position.

(Refer to item 1-2)

3.Adjust the guide roller.

(Refer to item 2-1)

4.Adjust the A/C head tilt.

(Refer to item 2-2)

5.Adjust the A/C head height and azimuth.

(Refer to item 2-3)

6.Connect CH-1 on the oscilloscope to TP4001

and CH-2 to TP4002. Playback the VHS alignment tape (JG001E). Set the tracking to manual center. Adjust X with the screwdriver for X (JG153) as the Fig. 2-1-A and Fig. 2-1-B.

(Refer to No. 2 of the item 2-1).

Components Location (TV)

Components Location (VCR)

(If the previous adjustments don’t work well:)

1. Connect CH-1 on the oscilloscope to TP4001 and CH-2 to TP4501.

2. Playback the alignment tape. (JG001F)

3. Set the tracking control to the center position. (Refer to item 2-1, NO. 2.)

4. Press the VOL. DOWN button on the set and the channel button (3) on the remote control simultaneously until the indicator REC disappears.

5. When the REC indicator is blinking, 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 ± 0.5 H.

6. Press the Tracking Auto button.

Fig. 3-1-A

Fig. 3-1-B 3-2: VCO COIL NOTE

For adjusting of VCO, connect input and output terminals of sweepmarker generator to the circuit as shown, then adjust it.

3-3: AFT COIL CONDITION

MODE-STOP

INSTRUCTIONS

1. Connect the output of sweepmarker generator to pin 5 of IC6001.

2. Connect the input of sweepmarker generator to pin 3 of CP6115.

3. Adjust L6012 until the waveform marker (38.9MHz) becomes as shown in Fig. 3-3.

4. Disconnect the sweepmarker generator and the oscilloscope.

5. Connect the generator (39.5MHz) to the pin 4 of CP6115 through 2.2K ohm and connect the DC voltmeter to pin 3 of CP6115.

6. Adjust L6012 until the DC voltage at pin 3 of CP6115 is 3.8V±0.1V.

Fig. 3-3 3-4: COLOR LEVEL CONDITIONS

MODE-STOP

INSTRUCTIONS

1. Connect the oscilloscope to TP4501.

2. When the Y-LEVEL is 100%, adjust the VR6001 until the MAGENTA Section LEVEL becomes 45± 5%. (Refer to Fig. 3-4)

Fig. 4-2

Fig. 4-3

Fig. 4-4

(VCR SECTION) Components Location

3. ADJUSTMENT PROCEDURE

Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies.

CAUTION

When replacing IC’s or transistors, use a silicon grease. (To prevent the damage to IC’s and transistors.)

3-1: PG SHIFTER (HEAD SWITCHING) ADJUSTMENT CONDITIONS

MODE-PLAYBACK

Input Signal-Alignment Tape (JG001F) or Similar

INSTRUCTIONS

1. Unplug the AC plug once to set the clock to the non-setting state. Then, set the volume level to minimum.

2. Playback the alignment tape. (JG001F)

3. Set the tracking control to the centre position. Refer to item 2-1, NO. 2.)

4. Press the VOL. DOWN button on the set and the channel button (3) on the remote control simultaneously until the indicator REC disappears. If the indicator REC disappears, adjustment is completed.

CONDITION

MODE-STOP

INSTRUCTIONS

1. Connect the output of sweepmarker generator to pin 5 of IC6001.

2. Connect the input of sweepmarker generator to pin 17 of IC6001.

3. Connect a 10K ohm variable resistor to IF AGC terminal (pin 4 of IC6001), 9V line and ground, then adjust to make the waveform of the oscilloscope readable.

4. Adjust L6011 until the waveform marker (39.5MHz) becomes as shown in Fig. 3-2.

Fig. 3-2

Fig. 3-4 Electrical Adjustments (TV SECTION)

4. BASIC ADJUSTMENTS

On-Screen Display Adjustment Do not set the CLOCK, and sound to minimum. Press the VOL. DOWN key on the set and the Channel button (9) on the remote control simultaneously to appear the adjustment mode on the screen as shown in Fig. 4-1, Fig. 4-2, Fig. 4-3, Fig. 4-4, Fig. 4-5 and Fig. 4-6.

NOTE

Use the 1 - 7 keys on the remote control to select the options shown in Fig. 4-1, Fig. 4-2, Fig. 4-3, Fig. 4-4, Fig. 4-5 and Fig. 4-6. Press the 8 key to end the adjustments.

Fig. 4-1

Fig. 4-5

Fig. 4-6 4-1: CUTOFF

1. Activate the adjustment mode display of Fig. 4-1 and press the channel button (5) on the remote control.

2. Adjust the Screen Volume until picture is distinct.

4-2: WHITE BALANCE

1. Receive the color bar pattern.

2. Adjust the adjustment mode display of Fig. 4-2 until the white color is looked like a white.

AIWA VX-T1480

Electrical Adjustments

Cont’d

4-3: FOCUS

1. Receive the broadcasting signal.

2. Adjust the Focus Volume until picture is distinct.

4-4: HORIZONTAL PHASE

1. Receive the color bar pattern.

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-1 and press the channel button (1) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum.

4-5: VERTICAL POSITION

1. Receive the color bar pattern.

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-1 and press the channel button (2) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the horizontal line of the color bar comes to approximate center of the CRT.

4-6: VERTICAL SIZE

1. Receive the monochrome pattern.

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-1 and press the channel button (3) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the horizontal overscan is equal to the vertical overscan.

4-7: VERTICAL LINEA

1. Receive the monochrome pattern.

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-5 and press the channel button (6) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum.

4-8: HORIZONTAL PHASE 60 (AV)

1. Receive the monochrome pattern (Audio Video Input).

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-6 and press the channel button (1) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum.

4-9: VERTICAL LINEA 60 (AV)

1. Receive the monochrome pattern (Audio Video Input).

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-6 and press the channel button (3) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes minimum.

4-10: OSD HORIZONTAL

1. Using the remote control, set the brightness

and contrast to normal position.

2. Activate the adjustment mode display of Fig. 4-1 and press the channel button (6) on the remote control.

3. Press the VOL. UP/DOWN button on the remote control until the difference of A and B becomes minimum. (Refer to Fig. 4-7)

Fig. 4-7 4-11: SUB CONTRAST (TV)

1. Receive the monochrome pattern (RF Input).

2. Activate the adjustment mode display of Fig. 4-3 and press the channel button (2) on the remote control.

3. Press the VOL. UP/DOWN button on the remote control until the CONTRAST level is set to the 20”.

4-12: SUB CONTRAST (AV)

1. Receive the monochrome pattern (Audio Video Input).

2. Activate the adjustment mode display of Fig. 4-3 and press the channel button (2) on the remote control.

3. Press the VOL. UP/DOWN button on the remote control until the CONTRAST level is set to the “20”.

4-13: SUB BRIGHTNESS (TV)

1. Receive the monochrome pattern (RF Input).

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-3 and press the channel button (1) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the white 25% is slightly brilliant.

4-14: SUB BRIGHTNESS (AV)

1. Receive the monochrome pattern (Audio Video Input).

2. Using the remote control, set the brightness and contrast to normal position.

3. Activate the adjustment mode display of Fig. 4-3 and press the channel button (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 oscilloscope to TP801.

3. Activate the adjustment mode display of Fig. 4-3 and press the channel button (3) on the remote control.

4. Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 4 scales on the screen of the oscilloscope.

5. Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 95% (VX-T1480) or 85% (VXG140) of the white level. (Refer to Fig. 4-8)

Fig. 4-8

4-16: SUB COLOR (AV)

1. Receive the color bar pattern (Audio Video Input).

2. Connect the oscilloscope to TP801.

3. Activate the adjustment mode display of Fig. 4-3 and press the channel button (3) on the remote control.

4. Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 4 scales on the screen of the oscilloscope.

5. Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 95% (VX-T1480) or 85% (VXG140) of the white level. (Refer to Fig. 4-8).

4-17: SUB TINT (AV)

1. Receive the color bar pattern (Audio Video Input).

2. Connect the oscilloscope to TP803.

3. Activate the adjustment mode display of Fig. 4-3 and press the channel button (4) on the remote control.

4. Press the VOL. UP/DOWN button on the remote control until the waveforn becomes as shown in Fig. 4-9.

Fig. 4-9 4-18: CONSTANT VOLTAGE

1. Receive the monochrome pattern.

2. Using the remote control, set the brightness and contrast to minimum position.

3. Connect the DC voltmeter to TP401.

4. Adjust the VR502 until the DC voltmeter is 100V ± 0.5V.(VX-T1480) or 103V ± 0.5V (VXG140).

5. PURITY AND CONVERGENCE ADJUST-

MENT NOTE

1. Turn the unit on and let it warm up for at least 30 minutes before performing the following adjustments.

2. Place the CRT surface facing east or west to reduce the terrestrial magnetism.

3. Turn ON the unit and demagnetize with a Degauss Coil.

5-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)

1. Tighten the screw for the magnet. Refer to the adjusted CRT for the position. (Refer to Fig. 5-1). If the deflection yoke and magnet are in one body, untighten the screw for the body.

2. Receive the green raster pattern from color bar generator.

3. Slide the deflection yoke until it touches the funnel side of the CRT.

4. Adjust center of screen to green, with red and blue on the sides, using the pair of purity magnets.

5. Switch the color bar generator from the green raster pattern to the crosshatch pattern.

6. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets.

7. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets.

8. Adjust the crosshatch pattern to change to white by repeating steps 6 and 7.

5-2: PURITY NOTE

Adjust after performing adjustments in section 5-1.

1. Receive the green raster pattern from color bar generator.

2. Adjust the pair of purity magnets to center the color on the screen. Adjust the pair of purity magnets so the color at ends are equally wide.

3. Move the deflection yoke backward (To neck side) slowly, and stop it at the position when the whole screen is green.

4. Confirm red and blue colors.

5. Adjust the slant of the deflection yoke while watching the screen, then tighten the fixing screw.

Fig. 5-1 5-3: STATIC CONVERGENCE NOTE

1. Receive the crosshatch pattern from color bar generator.

2. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets.

3. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets.

5-4: DYNAMIC CONVERGENCE NOTE

Adjust after performing adjustments in section 5-3.

1. Adjust the differences around the screen by moving the deflection yoke upward/downward and right/left. (Refer to Fig. 5-2-a)

2. Insert three wedges between the deflection yoke and CRT funnel to fix the deflection yoke. (Refer to Fig. 5-2-b)

Fig. 5-2-a

Fig. 5-2-b

OVD-5 Deck Alternative Parts

AIWA VX-T1480

OVD-5 Deck Alternative Parts Cont’d

AIWA VX-T1480

OVD-5 Deck Alternative Parts Cont’d

Earphone Diagram

AIWA VX-T1480

Deck Exploded Parts View

Item Part No. Description

301 S5-OP6-004-710 BRACKET, BRAKE 1 302 S5-OP4-003-580 ADJUST, TENSION 1 303 S5-OA4-001-220 TENSION BAND ASSY 1 304 S5-OA4-001-240 TENSION ARM ASSY 305 S5-OA4-001-230 TENSION LEVER 2 ASSY 1 306 SS-OA6-001-550 MAIN BRAKE S ASSY 307 S5-OA6-001-560 MAIN BRAKE T ASSY 1 308 S5-OP8-002-520 SPR,MAIN BRAKE 1 309 S5-OP9-005-640 REFLECTOR EOT 1 310 SS-OP4-004-110 REFLECTOR, LED 2 1 311 S5-OP8-002-690 SPR, AC HEAD 3 312 S5-OP5-000-600 BASE, AC HEAD 1 313 S5-OP0-003-940 POST, C ASS GUIDE L 1 314 SS-OP8-002-450 SPRING, AZIMUTH 2 1 315 S5-OA5-000-130 AHC ASSY 1 316 S5-OA4-001-020 G-ROLLER ASS’Y 2 317 S5-OA4-001-140 BASE, S INCLINED ASSY 1 318 S5-OA4-001-150 BASE, T INCLINED ASSY 1 319 S5-OP4-003-300 CATCHER S 1 320 S5-OP4-003-320 CATCHER T 1 321 S5-OP4-003-430 CAMPINCH ROLLER 1 322 S5-OP6-004-870 BELT, LOADING 1 323 S5-OA4-001-170 PINCH ROLLER BLOCK 1 324 S5-OP9-005-410 CASS, OPENER 1 325 S5-OP8-002-640 SPR, P5 1 326 S5-OA4-001-200 PS ARM ASSY 1 327 S5-OP4-003-420 CAM, GEAR 1 328 S1-462-30A-140 VT2+3-1 1 1 329 S5-OP4-003-440 CAM, P5 1 330 S5-OP4-003-560 SPR, TENSION ARM 2 1 331 S5-OP4-003-570 SPR, TENSION ARM 1 1 332 S5-OP2-002-160 REEL S 1

Deck Parts List

Deck Parts List Cont’d

Item Part No. Description

333 S5-OP2-002-170 REEL T 1 334 S5-OP4-004-020 CATCHER, P52 1 335 S5-OP6-004-65O SUBBRAKE S 1 336 S5-OP8-002-530 SPR, S-S BRAKE 1 337 S5-OP2-002-470 ARM, JOINT 1 338 S5-OP8-002-620 SPR, JOINT ARM 1 339 S5-OA6-001-570 SUB BRAKE T ASSY 1 340 S5-OP8-002-540 SPR,T-S BRAKE 1 341 S5-OP8-002-550 5PR,CAPBRAKE 1 342 PLATE BOTTOM 1 343 S5-OA6-001-760 ROD MAIN ASSY 1 344 S5-OP4-003-410 GEAR, MIDDLE 1 345 S5-OP6-005-350 CAM MAIN 1 346 S5-OP6-004-680 LEVER MAIN BRAKE 1 347 S5-OA6-001-590 WORM ASSY 1 348 S5-OP6-004-830 BRACKET, WORM F 1 349 S5-OP6-004-740 LEVER, RATCHET 1 350 S5-OP6-004-840 BRACKET, WORM R 1 351 S5-OP3-001-510 LEVER,LOADING 1 352 CAPSTAN BRAKE ASSY (MJ) 1 353 S5-OP3-001-520 GEAR, LOADING S 1 354 S5-OP3-001-530 GEAR, LOADING T 1 355 S5-OA3-000-530 LOADING ARM S ASS’Y 1 356 S5-OA3-000-540 LOADING ARM T ASS’Y 1 357 S5-OP8-002-630 SPR,LOADING GEAR 2 358 MAIN CHASS ASSY 1 359 S5-OP2-002-130 CENTER PULLEY 1 360 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 CLUTCH GEAR S ASSY 1 366 S5-OP4-003-600 LEVER, TENSION 1 367 S5-OP4-003-590 HOLDER, TENSION 1 368 S5-OP8-002-560 SPR, MAIN ROD 1 369 S5-OP2-002-1S0 BELT,CAPSTAN 1 370 S5-OP3-001-500 SLIDER, LOADING 2 401 S5-OP9-006-170 BRKET , TOP 1 402 S5-OP9-006-070 BRACKET, SIDE L 1 403 S5-OA9-001-710 LINK ASSY 2 1 404 S5-OP9-006-150 BRKET, SIDER 1 405 S5-OP9-006-010 GEAR, JOINT 1 406 S5-OP9-006-020 GEAR, CAM 1 407 S5-OP9-006-090 GEAR, LINK R 1 408 S5-OP9-006-720 LEVER,FLAP 2 1 409 S5-OP9-006-160 BRKET, SIDE R2 1 410 ---- REFLECTOR, EOT 1 411 S5-OP8-002-960 SPR, LOCKER 2 412 S5-OP9-006-110 CASS, HOLDER 1 413 S5-OP9-006-130 CASS, SIDE R 1 414 S5-OP9-006-120 CASS, SIDE L 1 415 S5-OP8-002-980 SPR, BRACKET R 1 416 S5-OP9-006-080 GEAR, CLUTCH 1 417 S5-OP8-002-970 SPR, CLUTCH 1 418 S5-OP9-006-190 TAPE GUIDE PIECE 1 419 S5-OP9-006-200 COVER,SENSOR BOT 1 420 S5-OP8-002-900 SPR, EARTH 1 421 S5-OP8-002-940 SPR, LINK 2 422 S5-OPB-002-990 SPR, PACK 2 423 S5-OP9-006-050 LOCKER, L 1 424 S5-OP9-006-060 LOCKER, R 1 425 S5-OP9-006-100 LEVER, BOT 1 501 87-357-529-310 SCREW TAP(P)BIND 1.7-4.0 2 502 S1-092-26A-640 VT2+2.6-16 2 503 87-751-074-410 VT2+2.6-8 6 504 87-743-073-010 VT2+2.6-6 7 505 S1-071-236-040 SCREW, TAP 23-6 PAN 1 506 87-264-074-410 SCREW, TAP(B)PAN 26-8 3 507 S2-P16-600-5N0 POLY, W(CUT)1.6-6-0.5 2 508 S2-Q31-54B-3N0 PW, 3.1-5.4-T0.13 1 509 S1-0A1-306-040 SCREW, WASHER(A)M3-6 3 510 S1-0B1-266-040 UFT2+M2.6-6 2 511 87-258-091-010 U+M3-3 2 512 87-253-07S-010 U+M2.6-10 3 513 S1-0A1-235-040 SEMS A M2.3-5 2 S14 87-261-093-410 SCREW, M3-5 2 515 87-067-909-010 POLY, W(CUT)2.6-6-0.5 2 516 S2-Q26-471-3N0 POLY, W 2.6-47-0.13 2 517 S2-P26-A00-5N0 POLY, W(CUT)2.6-10-0.5 1 CD1001 S6-872-205-8A0 CORD CONN 8722058A 1 CD2001 ---- JUMPER 2W06080 1 CD5001 ---- CORD, JUMPER 2L05150 1 H5001 S5-23D-910-290 HEAD, AC HVMZA12 1 H5002 S5-43D-020-100 HEAD,FULL ERASE HVFHF00 1 M101* S5-96P-480-010 MOTOR, LOAD(1) 1 M2001* S5-94J-980-040 CAPSTAN DD UNIT SP39BD 1 M2003* S5-89V-110-040 MICRO MOTOR EP14BA 1 SW101 S5-202-440-030 SW, ROTARY SRZZ0B064A 1 UN4001* S4-841-1B5-000 CYLINDER UNIT ASSY 1 * Safety Parts