Sony UDA-1 Service Manual page 20

UDA-1
– From page 18 –
Check that the sound from
the LINE IN input is outputted
of headphone.
OK
Check that the sound from
the OPTICAL/COAXIAL input
is outputted of speaker.
OK
– Continued on
page 21 –
20
Check that the harness is
NG
correctly inserted in CN202 on
the AMP board and CN600 on
the HP board.
OK
Check that voltage of the
following is "H".
AMP board: CN215
pin 8 (HP_DET)
OK
Check that headphone signal
is outputted from the following
pins.
AMP board: CN202
pin 2 (HP_R), 4 (HP_L)
OK
Check that headphone signal
is outputted from the following
pins.
HP board:
CL601 (R-ch), CL603 (L-ch)
Check that the connector pin
NG
(J101, IC101 on the DIGITAL
board) terminal is normal.
OK
Check that digital audio signal
is outputted from the following
pins (MCLK, BCK, DATA,
LRCK).
DIGITAL board: CN304
pin 1, 3, 4, 5
OK
Check that digital audio signal
is inputted to the following pins.
DAC board: CN404
pin 1, 4, 5, 6
OK
Check that signal is outputted
from the following pins.
DAC board: CN401
pin 5 (R), 7 (L)
OK
OK
NG
Reinsert the harness.
Repair the harness.
Exchange the J600 on the HP
NG
board, or exchange the HP
board.
Check the AMP board, and
NG
exchange the defective parts
or board.
NG Check the HP board, and
exchange the defective parts
or board.
NG
Exchange the J101, IC101 on
the DIGITAL board.
Check the following parts and
NG
the surrounding circuit, or
exchange the DIGITAL board.
DIGITAL board: IC103, IC104,
IC106, IC107, IC111, IC402
Check that the harness is
NG
correctly inserted in CN404 on
the DAC board and CN304 on
the DIGITAL board.
Check the following parts and
NG
the surrounding circuit, or
exchange the DAC board.
DAC board:
IC400, IC401, IC402, IC405