Pioneer VSX-1022-K Service Manual page 35

5
Check that the data and clock signals are output.
IC1401 (pin 10)
Is there a master clock
24.576 MHz output?
(0 V ↔ 3.3 V)
Yes
IC1401 (pins 15, 16)
Is there a LR clock or BIT
clock output?
(0 V ↔ 3.3 V)
Yes
IC1401 (pin 14)
Is there a DATA output?
(0 V ↔ 3.3 V)
Yes
SWITCH
IC1405 (pin 4)
Is there a master clock
24.576 MHz output?
(0 V ↔ 3.3 V)
Yes
DIR output is OK.
Step 8: ADC
Check that the ANALOG input to DSP mode.
CN1401 (pins 17, 19)
Is there a analog audio
signal?
Yes
IC1401 (pin 17)
Is there a data
output?
(0 V ↔ 3.3 V)
Yes
IC1401 (pin 18)
Is there a bit clock
3.072 MHz input?
(0 V ↔ 3.3 V)
Yes
IC1401 (pin 19)
Is there a LR clock
48 kHz input?
(0 V ↔ 3.3 V)
Yes
To Step 9
5
6
DIRMCKO (master clock)
No
Is the voltage of PDN IC1401
pin 31 3.3 V?
15: DIRBCK (bit clock)
16: DIRLRCK (LR CLOCK)
No
Check the IC1401 and its peripheral
circuits of IC1401.
DIRDATO (DATA)
No
Check the IC1401 and its peripheral
circuits of IC1401.
D1MCLK (MASTER CLOCK)
No
Is the voltage of IC1405
pin 1 0 V?
Yes
Replace IC1405.
ANALOG AUDIO input
Is there a analog
No
audio signal of BRG-1 Assy
CP403 pins 17, 19?
Yes
Replace CP2003 wafer of BRG-1 Assy,
or reconnect BRG-1 Assy.
ADDATO (ADC AUDIO OUT)
No
D1BCK
No
D1LRCK
No
Check the path between IC1601 and data & address lines. SDRAM
(IC1602), FLASH ROM (IC1603), replace the D-MAIN Assy.
VSX-1022-K
6
7
No
Check the pin 11 of CN102,
is the voltage 3.3 V?
OK
Check the IC1405 and its peripheral
circuits of IC1405.
OK
Replace IC1401.
No
Check the path between pin1 of
IC1405 and pin 20 of CN102.
*IC1405 pin 1
0 V: DIR
3.3 V: HDMI
No
Check the AUDIO Assy.
7
8
No
Check the CPU Assy.
OK
Replace IC1401, IC1405.
OK
Check the CPU Assy.
35
8
A
B
C
D
E
F