Track Checking And Adjustment; Tg7 Slack Checking And Adjustment; Play Mode - Sony DSR-PD150P Service Manual

2-3-5.

Track Checking and Adjustment

• Checking / adjusting method
Run the tracking tape (J-20) in the PLAYBACK mode, and check
that the RF waveform is flat at both the entrance and exit.

PLAY mode

Normal waveform
Entrance side
TG3
Blast screw
Drum
2-3-6.

TG7 Slack Checking and Adjustment

• Checking / adjusting method
Run the tracking tape (J-20) in the REV mode, and visually check
from right above the slack between the capstan and TG6. If the
slack is great, rotate TG7 to satisfy the specified value.
Drum
Exit side
TG6
Blast screw
REV mode
Capstan
TG6
• If not flat
If the waveform at the entrance is bad, rotate TG3.
If that at the exit is bad, rotate TG6 to flatten the waveform.
• Tips for adjustment
The tape path waveform at the entrance and exit should both be flat,
or that at the entrance should be slightly raised and that at the exit
should be lowered. If that at the entrance is slightly lowered
especially, problems such as sound drop may occur.
Raised at the entrance.
If the waveform does not become flat even if the guides are rotated
at the entrance and exit, the characteristics may be faulty of the
tracking tape with time. Check again using a new tracking tape. If
the waveform still does not become flat, the coaster assembly and
drum base block assembly may be faulty.
(For details on how to replace, refer to "2-2-2. Drum Base Block
Assembly or 2-2-9. GL Block Assembly".)
• If the slack occurs
If the slack can not be corrected, the TG7 arm block assembly may
be faulty.
(For details on how to replace, refer to "2-2-6. TG7 Arm Block
Assembly".)
Check the slack between here.
Tolerance : ± 0.3 mm (Visually)
TG7
5-54
Faulty entrance side
Faulty exit side
Lowered at the exit.