Sony CDP-XA555ES Service Manual page 14

5. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0 Vdc, and check this level.
Traverse waveform
6. After check, remove the lead wire connected in step 1.
Skew Adjustment
Note: Do not perform the skew adjustment when not using attached sta-
bilizer to a set.
Connection:
SERVO board
TP (RFO)
TP (VC)
Procedure:
1. Remove the bottom plate, put one third of the unit out from
the desk.
2. Connect the osiclloscope to TP (RFO) and TP (VC) on SERVO
board.
3. Turned power switch (
!
4. Put disc (YEDS-18) in and press the N button.
5. Adjust to be clear the waveform of the oscilloscope turning
the adjsutment screw with a 3 screwdriver.
Note: Clear RF signal waveform means that the shap "◊"can be clearly
distinguished at the center of the waveform.
6. After the adjustment, lock the adjustment screw.
RF signal waveform
14
A
B
+ 1.5
level: 1.5 Vp-p
– 0.5
oscilloscope
(AC range)
+
–
button) on.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
(with the 10 : 1 prove
in use)
+ 0.25
level: 1.2 Vp-p
– 0.20
adjustment screw
– SERVO BOARD (Conductor Side) –
IC101
TP (TEI)
TP (FE)
CN101
3 screwdriver
TP (VC) TP
(AFJ)
TP (RFO)
TP (TE)
TP
(ADJ)
IC204