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XL-1500W
• HF error.
Is output (tracking error signal) obtained at the pins 31 (TEI)
and 32 (TEZI) of IC801 the CD TEST MODE "STEP 4" is
changed to "STEP 5"?
Yes
test mode "step 4"
TEI
TEZI
Is output (HF signal) obtained at the pin 24 (RFI) of IC801
when the CD TEST MODE "STEP 4" is changed to "STEP 5"?
Yes
test mode "step 4"
RFI
Is output (HF signal) obtained at the pins 27 (RFZI) and 28
(RFRP) of IC801 when the CD TEST MODE "STEP 4" is
changed to "STEP 5"?
Yes
test mode "step 4"
RFZI
RFRP
Is the following wave output to the pin 41 (DMO) of IC801
when the CD TEST MODE "STEP 4" or "STEP 5"?
Yes
test mode "step 4"
DMO
Normal.
• No sound.
No sound from both L and R-ch?
Yes
Is +3.3V applied to pin 51 (DVDD) of IC801?
Yes
Is signal of pins 50 and 53 of IC801 output?
Yes
The main PWB is faulty.
No
test mode "step 5"
No
test mode "step 5"
No
test mode "step 5"
No
test mode "step 5"
No
No
No
– 40 –
Is output obtained at the pins 3 and
8 of CNP801/CNW801.
Yes
Check the periphery of IC802.
Check the PWB pattern between
pin 11 (TEO) of IC802 and pins 31
and 32 of IC801.
Is it normal ?
Yes
Check the PWB pattern between pin 34 (TRO) of IC801 and pin 25
of IC803.
Check the periphery of IC803 and CNP801/CNW801.
If OK. Optical pickup failure.
Is output obtained at the pins 4 and
5,6 of CNP801/CNW801.
Yes
Check the periphery of IC802.
Check the PWB pattern between pin 19 (RFGO) of IC802 and pins
24 (RFI) of IC801.
If OK. IC802 is faulty
Check the periphery of IC802.
Check the PWB pattern between pin17 (RFRP) of IC802 and pins
27 (RFZI) and 28 (RFRP) of IC801.
If OK. IC802 is faulty.
Check the periphery pins 15~19 of IC801.
If OK. IC801 failure.
Check the interval between the pins 50 or 53 of IC801 and the pins
2 or 5 of IC101.
Check the PWB pattern between pin 51 of IC801 and Q808.
Check the peripheral parts of IC801. If OK, IC801 is faulty.
Optical pickup failure.
No
IC802 is faulty.
No
Optical pickup failure.
No
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