Pioneer VSX-321-K-P Service Manual page 17

5
Step 5: DIR
Check that the S/PDIF signal is output.
Check that changes by pulling out and inserting the digital input lines.
IC600 (pins 3,11)
Can observe the
digital signal?
(0 V ↔ 3.3 V)
Yes
IC602 (pins 31, 37)
Can observe the
digital signal?
(0 V ↔ 3.3 V)
Yes
IC602 (pin 20)
Is there a master
clock output?
Yes
IC602 (pin 18)
Is there a LR clock
output?
(0 V ↔ 3.3 V)
Yes
IC602 (pin 17)
Is there a DATA
output?
(0 V ↔ 3.3 V)
Yes
IC602 (pin 19)
Is there a bit clock
output?
(0 V ↔ 3.3 V)
Yes
SWITCH
IC101 (pin 4)
Is there a master clock
output?
(0 V ↔ 2.5 V)
Yes
IC101 (pin 7)
Is there a LR clock
output?
(0 V ↔ 2.5 V)
Yes
IC101 (pin 9)
Is there a bit clock
output?
(0 V ↔ 2.5 V)
Yes
To Step 6
5
6
3: OPTICAL
11: COXIAL
No
Check the path to OUTPUT
pin of JACK601, JACK602.
31: OPTICAL
37: COXIAL
No
Check the path to pins 4, 8
of IC600 or replace IC600.
DIR_SCKO (master clock)
No
Is the voltage of PDN
IC602 pin 34 3.3 V?
DIR_LRCK (LR CLOCK)
No
Replace IC602.
DIR_SDTO (DATA)
No
Replace IC602.
DIR_BCK (bit clock)
No
Replace IC602.
DAI_MCK (MASTER CLOCK)
No
DAI_LRCK (LR CLOCK)
No
DAI_bck (bit CLOCK)
No
HTP-071
6
7
No
Check the MAIN Assy.
Is the voltage of
IC101 pin 1 0V?
Yes
Replace IC101.
7
8
No
Check the path between
IC101 pin 1 and MAIN Assy.
*IC101 pin 1
0 V: DIR
3.3 V: HDMI
8
A
B
C
D
E
F
17