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• Track search failure
Does the sled motor run in FF/REW state when the SERVO
TEST MODE "STEP1" is set?
Yes
Is the following wave output to the pin 34 (TRO) of IC801
during track search in normal playback?
Yes
Is the following wave output to the pins 11 (TEO) of IC802
during track search in normal playback?
Yes
Is the above wave output to the pins 31 (TEI) and 32 (TEZI) of
IC801 during track search in normal playback?
Yes
Is the following wave output to the pin 27 (RFZI) and 28
(RFRP) of IC801 during track search in normal playback?
Yes
Normal.
• Sled motor operation failure.
Is following sled feed signal output the pin 40 (FMO) of IC801
when FF
/REW
key is pressed after the CD TEST
MODE "STEP 1" is set?
Yes
Is following sled feed signal output the pins 3 and 4 of IC803
when FF
/REW
key is pressed after the CD TEST
MODE "STEP 1" is set?
Yes
Is sled feed signal output the pins 1 and 2 of IC803?
Yes
Is sled feed voltage applied between both terminals of sled
motor?
Yes
Check the CD mechanism (periphery of sled motor).
If the sled motor does not run when DC2.0V is applied to
both terminals of sled motor, the sled motor is faulty.
• Sled servo failure.
Is following sled signal output the pin 40 (FMO) of IC801
during playback?
Yes
FMO
Normal.
TRO
TEO
TEI
TEZI
RFRP
RFZI
FF
REW
FMO
FF
REW
SL ±
Check as stated in item "SLED MOTOR OPERATION FAILURE".
No
IC801 failure.
No
Check the PWB pattern between pin 34 (TRO) of IC801 and pin
No
25 of IC803.
Check the PWB pattern between pins 26 and 27 of IC803 and
Optical pickup.
If OK. Optical pickup failure.
Check the PWB pattern between pin 11 (TEO) of IC802 and pins 31
No
and 32 of IC801. If OK. IC802 failure.
Check the PWB pattern between pins 22 (RFO),17 (RFRP), 19
No
(RFGO) and 20 (RFGC) of IC802 and pins 24,27,28 and 36 of IC801.
If OK. IC802 failure.
C801 is faulty.
No
Check the PWB pattern between pin 40 of IC801 and pins 3 and 4
No
of IC803.
Check the peripheral parts of IC803. If OK, IC803 is faulty.
No
Check the CNW802.
No
IC801 is faulty.
No
– 41 –
XL-1500W
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