Read Sharp XL-1500 (serv.man4) Service Manual online
XL-1500H
– 40 –
• HF error.
Yes
Yes
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"?
and 32 (TEZI) of IC801 the CD TEST MODE "STEP 4" is
changed to "STEP 5"?
Is output (HF signal) obtained at the pin 24 (RFI) of IC801
when the CD TEST MODE "STEP 4" is changed to "STEP 5"?
when the CD TEST MODE "STEP 4" is changed to "STEP 5"?
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"?
(RFRP) of IC801 when the CD TEST MODE "STEP 4" is
changed to "STEP 5"?
No
No
• No sound.
No sound from both L and R-ch?
Yes
Is +3.3V applied to pin 51 (DVDD) of IC801?
No
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.
of IC803.
Check the periphery of IC803 and CNP801/CNW801.
If OK. Optical pickup failure.
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 PWB pattern between pin17 (RFRP) of IC802 and pins
27 (RFZI) and 28 (RFRP) of IC801.
If OK. IC802 is faulty.
No
Yes
Normal.
Check the interval between the pins 50 or 53 of IC801 and the pins
2 or 5 of IC101.
2 or 5 of IC101.
No
Check the PWB pattern between pin 51 of IC801 and Q808.
Yes
Is signal of pins 50 and 53 of IC801 output?
No
Check the peripheral parts of IC801. If OK, IC801 is faulty.
Yes
The main PWB is faulty.
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 ?
Check the PWB pattern between
pin 11 (TEO) of IC802 and pins 31
and 32 of IC801.
Is it normal ?
Is output obtained at the pins 3 and
8 of CNP801/CNW801.
8 of CNP801/CNW801.
Optical pickup failure.
IC802 is faulty.
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 PWB pattern between pin 19 (RFGO) of IC802 and pins
24 (RFI) of IC801.
If OK. IC802 is faulty
Is output obtained at the pins 4 and
5,6 of CNP801/CNW801.
5,6 of CNP801/CNW801.
Optical pickup failure.
Is the following wave output to the pin 41 (DMO) of IC801
when the CD TEST MODE "STEP 4" or "STEP 5"?
when the CD TEST MODE "STEP 4" or "STEP 5"?
Check the periphery pins 15~19 of IC801.
If OK. IC801 failure.
If OK. IC801 failure.
No
No
No
Yes
Yes
No
Yes
Yes
test mode "step 4"
test mode "step 5"
TEI
TEZI
test mode "step 4"
test mode "step 5"
RFI
test mode "step 4"
test mode "step 5"
RFZI
RFRP
test mode "step 4"
test mode "step 5"
DMO
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