Pioneer A-70DA-K Service Manual page 11

5
A
Is there residual
waveform of switching
on the SP OUT terminal?
(sine waveform of approx. 420 kHz
and approx. 1.5 Vrms)
Is there output at
REC OUT terminal after
selecting the input line ?
IC11 solder failure or failure
IC2301 communication failure or solder failure or failure
Is there output at input
signal to the POWER
AMP DIRECT ?
Is there a signal at
CN4200 : 13 pin ?
Connection failure between
CN2016 and CN4200
Is there a signal at
C4116 : plus side
Is there a signal at
CN4006 : 8 pin
Check of the connection between CN4007 and CN5002
Check of the connection between CN4107 and CN5102
Check of the connection between CN4006 and CN5001
Check of the connection between CN4106 and CN5101
5
6
Refer to the 7) D-POWER AMP SUB ASSY diagnosis flowchart.
Whether change the
DC voltage of R219 when
operating the input
selector ?
Is there a signal
at IC2302 : 25 pin
(VOL IC) ?
Whether change the
DC voltage of R251 when
operating the volume ?
VR86 solder failure or failure
BN87,CN87 : solder failure or failure
21p FFC connection failure
CN81,BN81 : solder failure or failure
Is there a signal at
IC2304 : 3,5 pins ?
Is there a signal at
IC2304 : 1,7 pins ?
Is there a signal
at IC2101 : 1 pin,
IC2201 : 1 pin ?
IC4202 failure or check of the
power supply
Is XAMUTE set to "H" ?
IC4100 failure or check of the
power supply
A-70DA-K
6
7
VR85 solder failure or failure
BN85,CN85 : solder failure or failure
21p FFC connection failure
CN81,BN81: solder failure or failure
IC2303 solder failure or failure or
check of the power supply
IC11 solder failure or failure
IC2302 communication failure or
solder failure or failure
Check of the Relay(RL2301) for Pure Direct
Check of the Relay ON/OFF signal
Check of the parts of Relay
IC2304 failure or check of the power supply
IC2101,IC2201 failure or check of the
power supply
Is FUNC_MUTE set to "H" ?
7
8
YES
NO
A
B
C
D
E
F
11
8