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– 35 –

Yes

Yes

Is output (tracking error signal) obtained at the pins 33 (TE)
and 37 (TRCRS) of IC801 the CD TEST MODE "STEP 4" is
changed to "STEP 5"?

Is output (HF signal) obtained at the pin 44 (ARF) of IC801
when the CD TEST MODE "STEP 4" is changed to "STEP 5"?

Is output (HF signal) obtained at the pin 38 (/RFDET) of IC801
when the CD TEST MODE "STEP 4" is changed to "STEP 5"?

No

No

No sound from both L and R-ch?

Yes

Check the PWB pattern between pin 33 (TE) of IC801 and pin 19
of IC804.
Check the periphery of IC804 and CNW801/CNS801.
If OK.  Optical pickup failure.

Check the periphery of IC801.
Check the PWB pattern pin38 (/RFDET) of IC801.
If OK.  IC802 is faulty.

No

Yes

Normal.

Check the interval between the pins 73 or 75 of IC801 and the pins
1 or 3 IC601.

No

Yes

Is signal of pins 73 and 75 of IC801 output?

No

Check the peripheral parts of IC801. If OK, IC801 is faulty.

The main PWB is faulty.

Check the periphery of IC802.
Check the PWB pattern between
pin 20.
(TEOUT) of IC802 and pins 33 and
37 of IC801.
Is it normal ?

Is output obtained at the pins 2 and
5 of CNS802

Optical pickup failure.

IC801 is faulty.

Check the periphery of IC801.
Check the PWB pattern pin 44 (ARF) of IC801.
If OK.  IC802 is faulty

Is output obtained at the pins 1 and
3, 4 of CNS802.

Optical pickup failure.

Is the following wave output to the pin 10 (VIN2) of IC804
when the CD TEST MODE "STEP 4" or  "STEP 5"?

Check the periphery pins 52~53 of IC801.
If OK.  IC801 failure.

No

No

No

Yes

Yes

No

Yes

Yes

test mode "step 4"

test mode "step 5"

TE

TRCRS

test mode "step 4"

test mode "step 5"

ARF

test mode "step 4"

test mode "step 5"

/RFDET

test mode "step 4"

test mode "step 5"

VO2

– 36 –

Yes

Is following sled feed signal input the pin 3 (VIN1) of IC804
when FF/REW key is pressed after the CD TEST MODE
"STEP 1" is seted?

Is sled feed voltage applied between both terminals of sled
motor?

No

C801 is faulty.

Check the CNW803/CNS803.

No

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.

Yes

Is following sled signal output the pin 3 (VIN1) of IC804 during
playback?

Normal.

No

IC801 is faulty.

Does the sled motor run in FF/REW state when the SERVO
TEST MODE "STEP1" is set?

Is the following wave output to the pin 27 (TRO) of IC801
during track search in normal playback?

Is the following wave output to the pins 20(TEOUT) of IC802
during track search in normal playback?

Yes

Yes

No

Check as stated in item "SLED MOTOR OPERATION FAILURE".

No

IC801 failure.

No

Check the PWB pattern between pin 27 (TRO) of IC801 and pin
19 of IC804.
Check the PWB pattern between pins 17 and 18 of IC804 and
Optical pickup.
If OK.  Optical pickup failure.

Yes

Is the above wave output to the pins 33 (TE) of IC801 during
track search in normal playback?

No

Check the PWB pattern between pin 20 (TEOUT) of IC802 and pin
33  of IC801.  If OK. IC802 failure.

Normal.

Yes

Yes

Is following sled feed signal output the pins 1 and 2 of IC804
when FF/REW key is pressed after the CD TEST MODE
"STEP 1" is seted?

IC804 is faulty.

No

Is the following wave output to the pin 38 (/RFDET) of IC801
during track search in normal playback?

No

Check the PWB pattern pin 8 (ARF) and 38 (/RFDET) of IC801 and
pin15 (NRFDET) of IC802 .  If OK. IC802 failure.

Yes

TRO

TEOUT

TE

FF

REW

VIN1

VIN1

/RFDET

FF

REW

SL 

±

– 36 –

Yes

Is following sled feed signal input the pin 3 (VIN1) of IC804
when FF/REW key is pressed after the CD TEST MODE
"STEP 1" is seted?

Is sled feed voltage applied between both terminals of sled
motor?

No

C801 is faulty.

Check the CNW803/CNS803.

No

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.

Yes

Is following sled signal output the pin 3 (VIN1) of IC804 during
playback?

Normal.

No

IC801 is faulty.

Does the sled motor run in FF/REW state when the SERVO
TEST MODE "STEP1" is set?

Is the following wave output to the pin 27 (TRO) of IC801
during track search in normal playback?

Is the following wave output to the pins 20(TEOUT) of IC802
during track search in normal playback?

Yes

Yes

No

Check as stated in item "SLED MOTOR OPERATION FAILURE".

No

IC801 failure.

No

Check the PWB pattern between pin 27 (TRO) of IC801 and pin
19 of IC804.
Check the PWB pattern between pins 17 and 18 of IC804 and
Optical pickup.
If OK.  Optical pickup failure.

Yes

Is the above wave output to the pins 33 (TE) of IC801 during
track search in normal playback?

No

Check the PWB pattern between pin 20 (TEOUT) of IC802 and pin
33  of IC801.  If OK. IC802 failure.

Normal.

Yes

Yes

Is following sled feed signal output the pins 1 and 2 of IC804
when FF/REW key is pressed after the CD TEST MODE
"STEP 1" is seted?

IC804 is faulty.

No

Is the following wave output to the pin 38 (/RFDET) of IC801
during track search in normal playback?

No

Check the PWB pattern pin 8 (ARF) and 38 (/RFDET) of IC801 and
pin15 (NRFDET) of IC802 .  If OK. IC802 failure.

Yes

TRO

TEOUT

TE

FF

REW

VIN1

VIN1

/RFDET

FF

REW

SL 

±

– 36 –

Yes

Is following sled feed signal input the pin 3 (VIN1) of IC804
when FF/REW key is pressed after the CD TEST MODE
"STEP 1" is seted?

Is sled feed voltage applied between both terminals of sled
motor?

No

C801 is faulty.

Check the CNW803/CNS803.

No

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.

Yes

Is following sled signal output the pin 3 (VIN1) of IC804 during
playback?

Normal.

No

IC801 is faulty.

Does the sled motor run in FF/REW state when the SERVO
TEST MODE "STEP1" is set?

Is the following wave output to the pin 27 (TRO) of IC801
during track search in normal playback?

Is the following wave output to the pins 20(TEOUT) of IC802
during track search in normal playback?

Yes

Yes

No

Check as stated in item "SLED MOTOR OPERATION FAILURE".

No

IC801 failure.

No

Check the PWB pattern between pin 27 (TRO) of IC801 and pin
19 of IC804.
Check the PWB pattern between pins 17 and 18 of IC804 and
Optical pickup.
If OK.  Optical pickup failure.

Yes

Is the above wave output to the pins 33 (TE) of IC801 during
track search in normal playback?

No

Check the PWB pattern between pin 20 (TEOUT) of IC802 and pin
33  of IC801.  If OK. IC802 failure.

Normal.

Yes

Yes

Is following sled feed signal output the pins 1 and 2 of IC804
when FF/REW key is pressed after the CD TEST MODE
"STEP 1" is seted?

IC804 is faulty.

No

Is the following wave output to the pin 38 (/RFDET) of IC801
during track search in normal playback?

No

Check the PWB pattern pin 8 (ARF) and 38 (/RFDET) of IC801 and
pin15 (NRFDET) of IC802 .  If OK. IC802 failure.

Yes

TRO

TEOUT

TE

FF

REW

VIN1

VIN1

/RFDET

FF

REW

SL 

±