Pioneer SX-319V-K Service Manual page 21

5
Step 5: DIR
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the
digital input lines.
IC110 (Pins 3, 5) OPTICAL (Pin3: OPT2, Pin1: OPT1)
Can
No Check the path to OUTPUT PIN of
observe the
JACK105, JACK106.
digital signal
?
(0 V ⇔ 3.3 V)
Yes
IC109 (Pins 61, 63) OPTICAL (Pin61: OPT2, Pin63: OPT1)
Can
No
Check the path to pins 4, 6 of
observe the
digital signal IC110 or replace IC110.
?
(0 V ⇔ 3.3 V)
Yes
IC109 (Pin 67) COAX
Can
No
Check the path to pins 10-13
observe the
digital signal of IC110 or replace IC110.
?
(0 V ⇔ 3.3 V)
Yes
Check that it changes in the Playback and Pause modes of
the USB (iPod).
IC109 (Pin 71) From USB Assy
Can
No
observe the
Check the path to CP105 connector.
digital signal
?
(0 V ⇔ 3.3 V)
Yes
Check that the data and clock signals are output.
DIR_MCK (Master clock)
IC109 (Pin 10)
Is there
No
voltage of PDN
a master clock
IC109-pin 31
output?
(0 V ⇔ 3.3 V)
Yes
DIR_LRCK (LR clock)
IC109 (Pin 16)
Is there
No
Replace IC109.
a LR clock
output?
(0 V ⇔ 3.3 V)
Yes
IC109 (Pin 14) DIR_SDTO (Data)
Is there
No
a data Replace IC109.
output?
(0 V ⇔ 3.3 V)
Yes
5
6
No
Check the USB Assy.
Is the
No
3.3 V?
Check the MAIN Assy.
SX-319V-K
6
7
DIR_BCK (Bit clock)
IC109 (Pin 15)
Is there
No
Replace IC109.
a bit clock
output?
(0 V ⇔ 3.3 V)
Yes
Switch
DAI_MCK (Master clock)
IC106 (Pin 4)
Is there
No
a master clock
output?
(0 V ⇔ 2.5 V)
Yes
DAI_LRCK (LR clock)
IC106 (Pin 7)
Is there
No
a LR clock
output?
(0 V ⇔ 2.5 V)
Yes
IC106 (Pin 9) DAI_BCK (Bit clock)
Is there
No
a bit clock
output?
(0 V ⇔ 2.5 V)
Yes
Is the
voltage of
IC106-pin 1
0 V?
Replace IC106.
To Step 6
7
8
No
Check the path
Yes
between IC106-pin 1
and MAIN Assy.
*IC106 Pin1
0 V : DIR
3.3 V : HDMI
21
8
A
B
C
D
E
F