Sony UVW-1800P Service Manual page 277

7-11. AUDIO/TIMECODE HEAD POSITION CHECK/ADJUSTMENT
Tools :
Alignment tape CR2-1B PS : 8-960-096-51
Dual trace oscilloscope
+3 mm screw driver
~3 mm screw driver
Check procedure
1. Connect an oscilloscope.
CH-1 : TP203/SS-53 board (D-1)
CH-2 : TP403/AP-31P, AP-31AP board (D-!)
TRIG: CH-1
2, Playback the alignment tape CR2-1B PS.
3, Check that the timecode waveform time difference
with respect to CTL waveform satisfy the
specifications.
If the specifications is not satisfied, perform the
following adjustment.
Adjustment procedure
4, Loosen the two head fixing screws as shown by. 1/
4to 1/2 tum,
5. Insert -3 mm screw driver tip into the cut-out of
base. Adjust to satisfy the specifications.
6. Tighten the head fixing screw.
After completing this adjustment, be sure to perform
the following items,
7. Perform the Audio / Timecode Head Height Check
/ Adjustment. (Refer to section 7-8.)
8. Perform the Audio / Timecode Head Phase Check /
Adjustment. (Refer to section 7-9.)
9. Perform the Audio / Timecode Head-to-tape
contact Check / Adjustment.
(Refer to section 7-10.)
10. Perform the Audio / Timecode Head Position
Check / Adjustment. (Refer to section 7-11.)
CTL waveform a Lae,
(CH-1}
Timecode waveform
(CH-2)
Adjust this crossing point to the
middle of the second falling time. A
Specification
+ 400 jisec
~-3 mm screw driver
audio/timecode head
fixing screws
base.