Sharp XL-3000V - Manual (Page 46)

XL-3000V
– 46 –
• HF error.
Yes
Yes
Is output (tracking error signal) obtained at the pins 46 (TEI)
and 47 (TEZI) of IC802 the CD TEST MODE "STEP 4" is
changed to "STEP 5"?
Is output (HF signal) obtained at the pin 38 (RFI) of IC802
when the CD TEST MODE "STEP 4" is changed to "STEP 5"?
Is output (HF signal) obtained at the pins 41 (RFZI) and 42
(RFRP) of IC802 when the CD TEST MODE "STEP 4" is
changed to "STEP 5"?
No
No
• No sound.
Is the wave output at pins 45~48 on IC14V?
Yes
Is the wave output at pins 1 and 7 on IC11V?
No
Check the PWB pattern between pin 49 (TRO) of IC802 and pin 19
of IC804.
Check the periphery of IC804 and CNP802/CNW3.
If OK. Optical pickup failure.
Check the periphery of IC801.
Check the PWB pattern between pin17 (RFRP) of IC801 and pins
41 (RFZI) and 42 (RFRP) of IC802.
If OK. IC801 is faulty.
No
Yes
Normal.
Check the soldering and parts of IC14V.
No
Check the soldering and parts of IC11V.
Yes
Is the wave output at pins 14 and 17 on IC401?
No
Check the connection between IC11V and IC401.
Yes
Check areas between pins 5 and 26 on IC401 and IC601.
Check the periphery of IC801.
Check the PWB pattern between
pin 12 (TEO) of IC801 and pins 46
and 47 of IC802.
Is it normal ?
Is output obtained at the pins 3 and
8 of CNP802/CNW3. Optical pickup failure.
IC801 is faulty.
Check the periphery of IC801.
Check the PWB pattern between pin 19 (RFGO) of IC801 and pin
38 (RFI) of IC802.
If OK. IC801 is faulty
Is output obtained at the pins 4 and
5,6 of CNP802/CNW3.
Optical pickup failure.
Is the following wave output to the pin 55 (DMO) of IC802
when the CD TEST MODE "STEP 4" or "STEP 5"? Check the periphery pins 28~32 of IC802.
If OK. IC802 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