Sony UDA-1 Service Manual page 21

– From page 20 –
Check that the pin jack (J400
Check that the
NG
on the DAC board) terminal
sound from the
is normal.
OPTICAL/
COAXIAL input is
outputted of line
out.
Check that analog audio signal
is outputted from the following
OK
pins.
DAC board: IC415
pin 1 (L-ch), 7 (R-ch)
Check that voltage of the
following is "H".
AMP board: CN215
pin 15 (XLINE_OUT_MUTE)
Check that the USB jack
Check that the NG
(CN201 on the DIGITAL
sound from the
board) soldering is normal.
USB REAR input
is outputted of
speaker.
Check that voltage of the
OK
following pin is about 3.3 V
(USB3.3V).
DIGITAL board: IC202 pin 5
When PCM format is playback
signal, check that digital audio
data is outputted from the
following pins (MCLK, LRCK,
BCK, DATA).
DIGITAL board: IC203
pin 85, 86, 87, 88
When DSD format is playback
signal, check that digital audio
data is outputted from the
following pins.
DIGITAL board: IC203
pin 89, 90, 93, 94
Check that digital audio signal
is outputted from the following
pins (MCLK, BCK, DATA,
LRCK).
DIGITAL board: CN304
pin 1, 3, 4, 5
– Continued on
page 22 –
NG
Exchange the J400 on the
DAC board.
OK
Check the following parts and
NG
the surrounding circuit.
DAC board: IC415
OK
Check that the harness is
NG
correctly inserted in CN215 on
the AMP board and CN303 on
the DIGITAL board, or
repair the harness.
OK
OK
NG
Exchange the CN201 on the
DIGITAL board.
OK
Check that between the
NG
IC202 pin 5 (USB3.3V) line
and the ground does not
short circuit.
OK
Check the IC201, IC202 on the
DIGITAL board, and exchange
the IC201, IC202 on the
DIGITAL board.
Check that voltage of the
NG
following is "L".
DIGITAL board:
IC203 pin 51 (XGPIO_4)
Check the IC203 on the
DIGITAL board and the
surrounding circuit.
OK
Check that voltage of the
NG
following is "H".
DIGITAL board:
IC203 pin 51 (XGPIO_4)
Check the IC203, IC402 on the
DIGITAL board and the
surrounding circuit.
OK
Check the following parts and
NG
the surrounding circuit.
DIGITAL board: IC103, IC104,
IC106, IC107, IC111, IC402
Check that the harness is
OK
correctly inserted in CN404 on
the DAC board and CN304 on
the DIGITAL board, or
repair the harness.
OK
NG
NG
short
open
NG
OK
NG
UDA-1
Exchange the DAC board.
Exchange the AMP board.
Exchange the DIGITAL board.
Exchange the DIGITAL board.
Exchange the DAC board.
21