Pioneer A-70DA-K Service Manual page 14

1
6) Remote control unit can not be operated
Remote control unit can not be operated
A
Is there batteries in the
remote control unit ?
Is the old batteries in the
remote control unit ?
Is SR cable
connected to the
JK33(SR IN) ?
B
Is there a signal
at CN89 2 pin ?
Is there a signal
at CN89 : 1 pin ?
C
Is there a signal
at R237(SR_IN) ?
Is there a signal
at R131(SR_IN) ?
IC11 solder failure or failure
D
7) D-POWER AMP SUB ASSY diagnosis flowchart
Is the voltage of
CN5002 : 5 pin,CN5102 : 6 pin
approx. 40V *1 and
CN5002 : 2 pin, CN5102 : 9 pin
approx. -40V *1
Is the voltage between
plus and minus of
E
C4196, C4296 at 12V ?
(Note)
Because it operate on the basis of VS1 and VS2,
do not use the osilloscope.
Please be measured using the tester.
Is the voltage of C4199
side of R4182 and
C4299 side of R4282
at 9V or more ?
Return to the 1) No sound
F
14
1
2
Insert new batteries in the remote
control unit
Disconnect the SR calbe
Is there a signal
at R887 ?
BN89,CN89 Q811,R812
: solder failure or failure
JK33,Q905,Q906 : solder failure or failure
21p FFC connection failure
CN83(USB ASSY, FRONT ASSY),BN89,CN89
: solder failure or failure
R131,R237
: solder failure or failure
*1 when not connected to the
speaker (No-load)
Replace D-POWER AMP SUB ASSY
2
3
[Status of product]
 Insert AC Power cord
 Main unit POWER SW: ON
 Select SPEAKER-A
 INPUT : No specify otherwise
Is there a signal
RC81 solder failure or failure
at R815 ?
: solder failure or failure
Is the voltage
Check of the power supply circuit of D-POWER AMP ASSY
of CN5001 : 1 pin
approx. -25V ?
A-70DA-K
3
4
YES
NO
4