Sony MHC-V41D, Руководство по обслуживанию

Страница: 38 / 72

MHC-V41D
38
SECTION 5
TROUBLESHOOTING
1. Optical Pick-up Block (CMS-S76RFS7G1/S76RFS7GP) (OP1) Diagnosis Flow
Remove the top panel, turn the
power on, close the disc tray and
set in the state that optical pick-up
block can see.
Yes
Yes
Yes
The voltage of the following is 3.3 V.
MOTHER board: JL049
The optical pick-up block moves to
the inner circumference.
(Visual check)
No
The spindle motor rotates.
(Visual check)
No
The voltage of the following is 3.3 V.
MOTHER board: JL071 (IC009: pin 14)
No
Check the circuit of area surrounding
IC401 pin 17 (VOLD+), pin 18 (VOLD
í )
on the MOTHER board.
Check the circuit of area surrounding
IC301 pin 13 (FMO) on the MOTHER
board.
No
Yes
The SL+/SL í signal is outputted to the
CN402 pin 4 (SL+), pin 3 (SL í ) on the
MOTHER board.
Yes
Replace the optical pick-up block because
sled motor has the problem.
Check the circuit of area surrounding
IC401 pin 11 (VOSL+), pin 12 (VOSL
í )
on the MOTHER board.
Check the circuit of area surrounding
IC301 pin 12 (DMO) on the MOTHER
board.
No
The SP+/SP í signal is outputted to the
CN402 pin 2 (SP+), pin 1 (SP í ) on the
MOTHER board.
Yes
Replace the optical pick-up block because
spindle motor has the problem.
The optical pick-up block does the
focus search.
(Visual check)
No
Check the circuit of area surrounding
IC401 pin 14 (VOFC+), pin 13 (VOFC
í )
on the MOTHER board.
Check the circuit of area surrounding
IC301 pin 17 (FOO) on the MOTHER
board.
No
The FCS+/FCS í signal is outputted to the
CN302 pin 23 (FCS+), pin 24 (FCS í ) on
the MOTHER board.
Yes
Replace the optical pick-up block because
optical pick-up block has the problem.
– Continued on page 39 –