JMECHA - Sony VCR Service Manual (repair manual). Page 35

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1)

Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back
and enter the REV mode.  Confirm that pitches between peaks
of RF waveform are equally spaced.  (Refer to Fig. 4-14.)
If pitches between peaks of RF waveform are not equal, perform
sections "4-2 Tracking Adjustment" and "4-4. TG7 Guide
Adjustment".

2)

Enter the CUE mode.  Confirm that pitches between peaks of
RF waveform are equally spaced.  (Refer to Fig. 4-14.)  If
pitches between peaks of RF waveform are not equal, perform
sections "4-2 Tracking Adjustment".

1)

Play the tracking alignment tape (XH2-1) (Ref. No. J-5) back.

2)

Establish the FWD playback mode.  Confirm that RF waveform
rises up in two seconds or less.  Confirm also at this time that
tape slack does not occur at around pinch roller.

3)

Run a tape in CUE/REV mode and FF/REW mode.  After that
play the tape back and confirm that RF waveform rises up in
two seconds or less.

4)

Repeat steps 2) and 3) repeatedly.

Run a tape in CUE/REV mode.  Confirm to see that major tape curl
does not occur at TG2 lower taper, TG3 upper flange, TG6 upper
flange and TG7 upper flange during CUE/REV mode.