Panasonic Omnivision VHS PV-V402, Руководство по обслуживанию

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If the Horizontal Position of the Audio Control Head is not properly
adjusted, a maximum envelope cannot be obtained at the Neutral
Position of the Tracking Control Circuit.
1. Insert the alignment tape.
2. Press and hold FF button and CH DOWN buttons on VCR together
over 5 seconds in power off condition.
The power comes on and the unit goes into service mode.
3. Play back the alignment tape.
4. To enter Tracking center mode, press PLAY button in Play back mode.
"TRACKING CENTER" will be displayed on the TV monitor.
5. Connect the oscilloscope to TP3002 on the Video Signal Process
Section of the Main C.B.A. Use TP6205 as a trigger.
6. Loosen the Black Screw (D) and tighten it slightly. Set the H-Position
Adjustment Driver into the Hole (A). Then slowly turn the fixture either
clockwise or counterclockwise so that the envelope is at maximum.
Fig. M7
7. Tighten Black Screw (D).
8. To release from Tracking center mode, press PLAY or STOP button.
Note:
Old type of H-Position Adjustment Driver (VFK0136) can be used for this
adjustment.
6.3. ELECTRICAL ADJUSTMENT
6.3.1. EVR (Electronic Variable Resister) ADJUSTMENT WITH THE REMOTE CONTROL
This unit has electronic technology using I2C Bus concept.The PG SHIFTER ADJUSTMENT is
adjusted by using " On Screen Display " and the remote control instead of adjusting mechanical
controls (VR).
6.3.2. TEST EQUIPMENT
To do all of these electrical adjustments, the following equipment is required.
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