Sanyo MCH-900F Service Manual page 59

ii
CD
PLAYER ADJUSTMENTS
f.
ADJUSTMENTS
(a) Tracking balance adjustment
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L.P. F.
(1) Within one second afler pressing the OPEN/CLOSE and
RANDOM switches at Ihe same time, press the
FWD
switch.
(Service mode: TRACKING BALANCE)
(2) Connect anoscilloscope to TP131 (TE)and TP132(VC).
(3)
(4)
(5)
(6)
Set the test disc.
PLAY switch push ON.
Adjust SVRI 2 so that the oscilloscope's waveform is
symmetrical, as shown in the illustration.
Switch OFF the POWER.
(b)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Checking the "eye" pattern
Switch "ON" the POWER.
Connect an oscilloscope to J1 479 (RF) and TP132 (VC).
Load the test disc.
PLAY switch push ON.
Check 10 be sure that the " eye " pattern is at the center
waveform and that the diamond shape is clearly defined.
Press the STOP button.
Switch
"OFF"'
the POWER.
0.5V
Ov
P-P
200mVlDlV
A=B
2.2K ohm +
Jm479
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I OSCILLOSCOPE I
7TP 132
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