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5.62
From previous page
YES
Choose another CD
NO
Does the sledge
NO
(corr. placed) Does the
move uncontrolled?
sledge move to the CD?
YES
PCB9 or PCB35
YES
defective
Does the display show
NO
NO
Does the CD rotate?
"LOAD DISC"?
YES
PCB41
(DISC DETECTOR)
defective or
supply missing
YES
Start Turntable Motor (Test Mode 63, see Service
manual for instructions!) Measure 41P99
pin 1, 2 and 3. Is there app. 6V pp?
Does playback
NO
begin (sound) ?
YES
Choose another CD.
Check optocouplers on PCB30 & 31 and
NO
Is the previous CD
their signal path on PCB22. If this is OK,
placed correctly?
then PCB35 (MOTOR CONTROL) is defective.
YES
Randomly place a CD from the CD-library.
NO
Choose the CD and push ST.BY.
Is the CD placed correctly?
Error tree
Are there 5Vpp
NO
impulses on 35CP1?
YES
Remove 35P53.
NO
Apply 9V directly to the sledge motor.
Does the sledge try to move (It may be locked!)
YES
Enter Test Mode: (SHIFT, 9,0,2,5,8)
NO
Push CD, 66, 65.
Does laserarm move back and forth?
YES
Push 61. Is there
Measure 41P42 pin 3 &
NO
NO
light in the laser?
laser on 41P42, pin 7.
Is there 5Vpp?
(Use Test Mode)
YES
YES
CD-mechanism def.
Is Focus Search visible?
NO
(Use Test Mode)
YES
PCB41
NO
(DISC DETECTOR)
defective
YES
Turntable motor def.
Does CD stop with-
NO
in app.5 seconds?
YES
Check radial
servo and motor
Check if there is a 5V
PCB41 (CD)
NO
pulse during lead-in
defective
on a CD (35P50-15).
YES
PCB35
(MOTOR CONTROL)
defective
5.62
5.62
Error tree
Disconnect 26P96. Short circuit the socket 26P96
pin 1 & 4. Be careful not to damage the socket.
Are there 5 V impulses on 35CP1?
PP
YES
Sledge motor
PCB27 or PCB28
defective
defective
Repeat Test Mode 65, 66.
NO
Measure between pin 3 and 4 of 41P45.
Is there app. 3.5V pp?
YES
PCB41 (CD)
CD-mechanism def.
defective
Measure at 41P42
PCB41 (CD)
NO
pin 15 & 16.
defective
Is there app. 2.5V?
YES
CD-mechanism def.
Signal on 32P26 pin 1
PCB41 (CD)
NO
& 2 OK? (digital signal)
defective
YES
PCB32
(IN/OUTPUT SELECT)
defective
PCB35
NO
(MOTOR CONT.)
defective
PCB41 (CD) defective
PCB35
(Radial motor may
(MOTOR CONT.)
be short circuited)
defective
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