Panasonic PV-D4733S-K, Service Manual

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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. TEST EQUIPMENT
To do all of these electrical adjustments, the following equipment is required.
1. Dual-Trace Oscilloscope
Voltage Range: 0.001 V to 50 V/Div.
Frequency Range: DC to 50 MHz
50