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Top quality manual. Covers all aspects you'd expect in a top quality service manual for this Panasonic VHS VCR. The manual resolution is high. Another top quality manual from the only site worth downloading manuals from! If you're looking for a manual for the PV-9662 VHS VCR, this is the one you'll want to get!
complete part-lists and pcb layout, schematic diagram is good enlargable,
Text excerpt from page 78 (click to view)
ADJUSTMENT OF TAPE TRANSPORTING SYSTEM
2) Pre-Adjustment of the Path (Adjustment of PG)
A. C onnect the Channel 1(CH 1) of the O scilloscope to TP01-3(Head Switching Pulse) and CH2 to the V IDEO OU T. And align the Tracking VR on the center. B. Playback the Stair-step Signal Tape(DN 2). C. Turn the PG Volum e and adjust the gap between the S witching signal and the V-S ync signal to be 6.5H0.5H .
Figure 5-5
3) linearity Adjustment
Connect the Channel 1(CH1) of the O scilloscope to the TP01-2(CTL Pulse) and CH2 to the TP01-4(Envelope Wave) and EXT. Trigger to the TP01-3(Switching P ulse). And then, playback the test tape in the SP M ode. 3-1) Adjustm ent of S & T side A. Adjust the Tracking VR to m axim ize the RF signal of the test tape. B. Make the entrance and exit side Envelope Wave same as Fig. 5-6 by adjusting the S/T-Guide Roller ( and of Fig. 5-1). 3-2) Rough Adjustm ent of the X-Position A. Turn the Tracking V R to align it on the center. B. Loosen the A /C Head Screws by turning about 90120.
