Panasonic PV-4601 A Service Manual page 72

If adjustment is required, turn the top of the post with a Post Adjustment
Screwdriver. For adjustment of P2 and P3, refer to "CONFIRMATION OF TAPE
TRAVEL," Page 2-9.
3. When the scope display is as shown in Fig. M17-2, adjust the height of P2 so that
the waveform looks like the one shown in Fig. M17-4.
4. When the scope display is as shown in Fig. M17-3, adjust the height of P3 so that
the waveform looks like the one shown in Fig. M17-4.
Fig. M17-1
Fig. M17-2
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