Sony CDP-CE105 Service Manual page 10

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E-F Balance Check
Note : Use the widely use remote commander with 20 keys for this
check.
oscilloscope
BD board
TP(TEO)
TP(VC)
Procedure :
1. Connect test point TP (ADJ) on DISPLAY board to Ground with
a lead wire.
2. Connect oscilloscope to test point TP (TEO).
3. Turn Power switch on to set the ADJ mode.
4. Put disc (YEDS-18) in and playback.
5. Press the "16" button. (The tracking servo and the sledding servo
are turn off)
6. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
Traverse waveform
0V
TE
L 13942296513
A-B
X 100=less than ± 7%
Specified level : •
2(A+B)
• A+B=300 ± 100 mVp-p
7. 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.
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A
B
level : 300 ± 100 mVp-p
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Adjustment Location
[BD BOARD] (Conductor Side)
RF
RV101
IC101
RV103
FEO
TEO
RV102
VC
IC104
GND
[DISPLAY BOARD] (Conductor Side)
Q Q
3 6 7 1 3 1 5
IC401
co
.
9 4 2 8
FOK
IC102
TEI
FEI
PCK
0 5 8 2 9 9 4 2 8
R404 R405
TP
AFJ
TP
ADJ
m
9 9
9 9