Pioneer SC-68 Service Manual page 36

1
A
Flow [B]
DAC HIGH ASSY
diagnostic
Yes
DAC HIGH ASSY
CN2104 9,10 pin +6V
Yes
DAC HIGH ASSY
B
CN2101 18,19 pin +5V
Yes
DAC HIGH ASSY
Check the control signals
CN2101
15 pin DSPCK
16 pin DSPSO
10 pin DACS
3 pin DIRCS
When function is changed,
do clock,data,cs signals come?
C Yes
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 (zone 2)
arround IC2471
AD part
D
arround IC2431
DIR part
arround IC2001
E
F
36
1
2
Check +6V power supply path
No
 
REG A REG BRIDGE
 A-DAC BRIDGE  DAC HIGH ASSY
No
Check +5V power supply path

DIGITAL MAIN D-DAC BRIDGE
DAC HIGH ASSY
Diagnose or replace
No
DIGITAL MAIN ASSY
2
3
Other results
Repair or replace NG point
AUDIO
ALL NG
Other results
Repair or replace NG point

Diagnose DIGITAL MAIN ASSY
ALL NG
or replace DIGITAL MAIN ASSY
SC-68
3
4
Diagnose REG ASSY
(arround IC7521)
or replace REG ASSY
(arround IC9504)
4