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MATSUI VXA1105
Service Manual


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  • Contains Circuit Diagrams
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  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of MATSUI VXA1105 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 2 (click to view)
MATSUI VXA 1105
Alignments & Adjustments Cont’d

2
When installing the Inclined T Ass’y and Inclined S Ass’y, align the timing marks. 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. 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 Adjust so that the Tension Post is at the position of 0.3mm—0.5mm from the Rib. (Refer to Fig. 1-2) Fig. 2-16 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 Unit Assy. (Do not place an object which weighs over 500g.) * When you activate the deck without the Unit Assy, short circuit between TP1001 and TP1003. In this condition the BOT/EOT sensor will not function. 1-1: CONFIRMATION AND ADJUSTMENT OF REEL DISK HEIGHT Fig. 2-14 2-15: CAPSTAN DD UNIT (Refer to Fig. 2-15) 1. 2. 3. 4. Remove the screw (1). Disconnect the CP4105 9 pins. Remove the 3 screws Remove the Capstan DD Unit. 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. 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. 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. lf 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) 2-3: ADJUSTMENT OF A/C HEAD HEIGHT AND AZIMUTH 1. Playback a VHS alignment tape (JGOO1C) and observe the waveform at the audio output terminal. 2. Turn the screw (2) slowly to change the 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 fit. (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. 2-1: GUIDE ROLLER 1. Connect CH-1 on the oscilloscope to TP4002 Fig. 1-2 1-3: CONFIRMATION AND ADJUSTMENT OF BACK TENSION ON PLAYBACK Fig. 2-1-B 2. Confirm that the video tape is not curling at the flange of P1 post or is not running on flanges. 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. 2-1-A (PB Envelope) and CH-2 to TP4001 (SW Pulse). 2. Set the tracking to manual center position in the following way. Hold and press 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 JGOO5). 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 AC head tilt. (Refer to item 2-2)

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.

NOTE Use the specified screw to hold the Capstan DD Unit.

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 Assy. 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 Assy. NOTES 1. When installing the Main Rod Assy, install side (B) first, then install side (A). 2. When installing the Loading Lever, align the timing marks.

Fig. 1-4 NOTE If the torque value checked is out of tolerance, replace the appropriate parts as follows.
Check Items 1-4 1-5 1-6 Replace Parts Idler Ass’y or Clutch ASS’Y Idler Ass’y or Clutch ASS’Y Main Brake T Ass’y or Main Brake S Ass’y

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 Assy. 4. Remove the Loading Gear S Assy. NOTE Fig. 1-1-A 1-4: CONFiRMATION OF FAST FORWARD TORQUE 1. Set torque gauge (JGOO2G) on take-up reel disk, and place unit in FAST FORWARD mode. (Refer to Fig. 1-4) Fig. 1-3

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.

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