Pioneer PRO-141FD Service Manual page 64

1
A
A
No
Is sound output only from either
the L or R channel?
No
Has the sound of the HDMI
output?
B
Yes
C
Has the sound of the Analog RCA
and PC inputs output?
D
Waveforms
E
Input signal: L/R 1 kHz, 0.5 Vrms (VOL 30)
33
IC5401 - pins 1, 2, 4
V: 2 V/div H: 4 μS/div
F
64
1
2
Yes Is the balance control value for
the channel with no sound output
set to 0?
No
B
Go to and analyze the
channel with no sound output.
No Is a I2S signal input to IC5401?
(pins 1 to 4)
33
Yes
Is a analog audio signal output
from IC5401? (pins 10, 11)
Yes
Is a analog audio signal output
from IC5402? (pins 1, 7)
Yes
Is a analog audio signal input to
IC3101?
30
Yes
Check around the IC3101.
If there was no ploblem, replace LC75411WS.
No
Is a signal input to IC3101?
(pins 39, 40, 46, 47)
30
Yes
Check the communications around the IC3101 and between the IC3101
and the microcomputer. If there was no ploblem replace the MAIN Assy.
34 35
IC5401 - pins 2, 3 IC5401 - pins 10, 11
V: 1 V/div H: 400 μS/div
V: 2 V/div H: 400 nS/div
PRO-141FD
2
3
Yes
Set the balance control value to the
center position.
No
Failure in IC5301 or malfunction of a connected device
34
No
Failure in IC5401 or its surrounding parts,
or breakage in the circuit
35
No
Failure in IC5402 or its surrounding parts,
or breakage in the circuit
36
No
Breakage in the circuits or failure in parts located
between the JA3001/JA3002 input terminals and IC3101
31
Failure in the HDMI_L or HDMI_R line from CN3001
No
or parts connected to the HDMI_L or HDMI_R terminal
of CN3001, or breakage in the circuit
31
36
IC5402 - pins 1, 7
V: 1 V/div H: 400 μS/div
3
4
4