Sony UDA-1 Service Manual page 16

UDA-1
– From page 15 –
Check that the harness is
Press and hold
NG
correctly inserted in CN305 on
(about 4 seconds)
the DIGITAL board and CN401
the [?/1] button,
on the FRONT-L board.
and the all LEDs
are lighting (about
2 seconds).
OK
Check that voltage of the
following is about 5.2 V.
DCDC board: CL154 or
CN153 pin 1, 2 (D5V)
Check the following parts and
the surrounding circuit.
FRONT-L board: D401 to D405,
D409 to D411, IC402, IC403,
S401, S402
Check the following parts and
the surrounding circuit.
FRONT-R board: D500, D501
OK
16
NG
Reinsert the harness.
Repair the harness.
OK
Check the following parts and
NG
the surrounding circuit, and
exchange the defective parts
or DCDC board.
DCDC board: IC151
OK
Exchange the defective parts
NG
or FRONT-L board of
problematic part.
OK
NG Exchange the defective parts
or FRONT-R board of
problematic part.
Check the following parts and
NG
the surrounding circuit, and
exchange the defective parts
or board.
DIGITAL board: IC306