E-F Balance (1 Track Jump) Check; Focus/Tracking Gain Adjustment (Rv102, Rv103) - Sony HCD-ED1 Service Manual

E-F Balance (1 Track Jump) Check

(Without remote commander)
BD board
TP (TE)
TP (VC)
Procedure :
1. Connect oscilloscpe to test point TP (TE) on BD board.
2. Turn Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the "P (Pause)" button. (Becomes the 1 track jump mode)
5. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
1 track jump waveform
A – B
Specified level: •
2 (A + B)
• A + B = 300 ± 100 mVp-p
6. Remove the lead wire connected in step 1.

Focus/Tracking Gain Adjustment (RV102, RV103)

This gain has a margin, so even if it is slightly off.
There is no problem.
Therfore, do not perform this adjustment.
Please note that it should be fixed to mechanical center position
when you moved and do not know original position.
oscilloscope
+
–
A
0V
B
LEVEL : 300 100 mVp-p
x 100 = less than ± 7%
Adjustment Location:
[BD BOARD] — Component Side —
RF
RV101
RV103
FEO
TEO
RV102
VC
IC104
– 12 –
FOK
IC101
TEI
FEI
PCK
GND