Casio CD-350S, Руководство по обслуживанию

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— 10 —
A
Does the Laser emit?
Does the lens
move up and down?
Is the
waveform at pin
35 (FEO) of IC902 like that
shown
in figure 9?
Is the waveform
at pin 1 FO IC902 like that shown
in figure 8?
No
No
A1
A2
Yes
Yes
Yes
Yes
Load a disc and close the CD door.
Then check the following.
No
No
l
Check wire connector from
pickup.
l
Check circuit around pins
1~5 and 46~48 of IC902.
l
Check circuit around
pins 30~42 of IC902.
l
Check circuit around IC901, IC902 and
IC903.
(See page12)
(See page11)
Figure 8
Figure 9
>1.5 V
>1.5 V
2-A Note : Open the CD door and set the door switch for “on” position. Check the radiation power with
an optical power meter or by watching the radiation through the lens or the pickup unit at a
minimum distance of 30cmfrpm the from pickup.
RFO-Vref
RFO-Vref