Pioneer A-70DA-K Service Manual page 12

1
2) No sound (specific input)
A
No sound (specific input)
Is there input signal have
been pointed out at
following pins of IC2301 ?
SACD/CD 3,4 pins
NETWORK 5,6 pins
LINE1 7,8 pins
LINE2 13,14 pins
B
IC2301 communication failure or solder failure or failure
3) No sound (PHONO input)
C No sound (PHONO input)
Is there output
both MM and MC ?
D
Is there a signal
at R389,R390 ?
Is there a signal
at IC33 : 1,7 pins ?
E
Is there a signal
at IC2301 : 1,2 pins ?
IC2301 communication failure or solder failure or failure
F
12
1
2
[Status of product]
 Insert AC Power cord
 Main unit POWER SW: ON
 POWER ON operation by remote control unit
 Select SPEAKER-A
 INPUT : NETWORK
Input Jack solder failure
Electrolytic capacitor for coupling of each input
: solder failure or failure
[Status of product]
 Insert AC Power cord
 Main unit POWER SW: ON
 POWER ON operation by remote control unit
 Select SPEAKER-A
 INPUT : PHONO(MM or MC)
Whether H/L
operate the voltage
of BN31 : 1 pin
(MM/MC_RLY) ?
Connection failure between
BN12 and CN2012
Connection failure between
RL31,RL32 : solder failure
BN31 and CN2014
or failure
Input Jack solder failure
IC33,Q351-Q354 : solder failure or
failure or check of the power supply (±7.5V)
Connection failure between CN2014 and BN31
A-70DA-K
2
3
YES
NO
YES
NO
Whether H/L
Whether H/L
operate the voltage
operate the voltage
of R151
of R254
(MM/MC_RLY) ?
(MM/MC_SW) ?
IC11,R227
: solder failure or failure
3
4
A-70DA-K, A-70DA-S only
SW82 failure
Connection failure between
BN85 and CN85
BN85, CN85 : solder failure
21p FFC connection failure
4