Read Sony CDP-EX100 / MHC-EX100AV / MHC-EX50 / MHC-EX70AV / MHC-EX90 Service Manual online
– 7 –
E-F Balance Check
Procedure:
1. Connect oscilloscpe to test point TP (TEO).
2. Turn Power switch on.
3. Connect pin @¢ of IC60I on the PANEL board to GND with a lead
1. Connect oscilloscpe to test point TP (TEO).
2. Turn Power switch on.
3. Connect pin @¢ of IC60I on the PANEL board to GND with a lead
wire.
4. Put disc (YEDS-18) in and playback.
5. Push TIME button.
6. Confirm that the oscilloscope waveform is symmetrical on the top
5. Push TIME button.
6. Confirm that the oscilloscope waveform is symmetrical on the top
and bottom in relation to 0Vdc, and check this level.
Traverse waveform
7.Remove the lead wire connected in step 3.
Focus/Tracking Gain Adjustment (RV102, 103)
This gain has a margin, so even if it is slightly off.
There is no problem.
Therefore, 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.
There is no problem.
Therefore, 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.
BD board
oscilloscope
TP (TEO)
TP (VC)
TP (VC)
[PANEL BOARD]
(Conductor Side)
0V
level : 300±100 mVp-p
symmetry
IC601
40
25
64
41
24
65
80
1
Adjustment Location :
[BD BOARD]
(Conductor Side)
IC101
RF
TEI
FEI
RV102
RV103
IC104
IC102
FEO
TEO
FOK
VC
GND
PCK
RV101
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