Pioneer SC-LX85 Service Manual page 47

1
Flow [B]
DAC HIGH ASSY
diagnostic
A
Yes
DAC HIGH ASSY
CN2104 9,10pin +6V
Yes
DAC HIGH ASSY
CN2101 18,19pin +5V
Yes
B
DAC HIGH ASSY
Check the control signals
CN2101
15pin DSPCK
16pin DSPSO
10pin DACS
3pin DIRCS
When function is changed,
do clock,data,cs signals
Yes
C
Continue the following flow or
replace DAC HIGH ASSY
Diagnose NG part of DAC HIGH ASSY
DA part (MAIN)
around IC2011-2014,2017
DA part (zone2)
arround IC2471
AD part
arround IC2431
DIR part
D
arround IC2001
E
F
38
1
2
Check +6V power supply path
REG ASSYA REG BRIDGE
No
ASSYAUDIO ASSY
A-DAC BRIDGE ASSY
DAC HIGH ASSY
Check +5V power supply path
No
DIGITAL MAIN ASSYD-DAC
BRIDGE ASSYDAC HIGH ASSY
Diagnose or replace
No
DIGITAL MAIN ASSY
2
3
Other results
ALL NG
Other results
ALL NG
SC-57
3
4
Repair or replace NG point
Diagnose REG ASSY
(arround IC7521)
or replace REG ASSY
Repair or replace NG point
Diagnose DIGITAL MAIN ASSY
(arround IC9504)
or replace DIGITAL MAIN ASSY
4