Pioneer PDP-4280HD Service Manual page 62

1
A
A
Has the sound of the Analog
broadcasting output?
Yes
Has the sound of the HDMI
output?
B
Yes
Has the sound of the Digital
broadcasting output?
Yes
C
Has the sound of the Analog RCA
and PC inputs output?
D
Yes
Has the sound of the side input
output?
E
Waveforms
Input signal: L/R 1 kHz, 0.5 Vrms (VOL 30)
54
IC5201 - pin 78
V: 1 V/div H: 1 μS/div
F
62
1
2
Is a signal input to IC9101?
No
(pin 68)
Yes
Check the communications around the IC9101 and between the IC9101
and the microcomputer. If there was no ploblem, replace MAP5601M.
No Is a SPDIF signal output from
IC5201? (pin 78)
Yes
Is a SPDIF signal input to
IC9101? (pin 4)
Yes
Check that the HDMI switch of the
MENU is properly set.
Check the FFC and cables between
No
the MAIN Assy and TANSHI Assy.
Does not sound output even if replace
them?
No
Is a I2S signal input to IC9101?
(pins 106 to 108)
55 56
Yes
Check the communications around the
IC9101 and between the IC9101 and
the microcomputer. If there was no
ploblem replace the MAIN Assy.
Is a signal input to IC9101?
No
(pins 24 to 27, 31, 32,
49
34 to 37)
Yes
Check the communications around the IC9201 and between the IC9201
and the microcomputer. If there was no ploblem replace the MAIN Assy.
Check the cables between CN8801
No
and CN9351, and check around
the pin jack.
OK
Is a signal input to IC9101?
(pins 31, 32)
49
Yes
Check the communications around the IC9101 and between the IC9101
and the microcomputer. If there was no ploblem replace the MAIN Assy.
55 56
IC9101 - pin 106 IC9101 - pin 107
V: 1 V/div H: 10 μS/div V: 1 V/div H: 10 μS/div
PDP-4280HD
2
3
Check the communications between
No
the IC6001 and the microcomputer
and between the IC6001 and IC9101.
No
Replace the IC5201.
54
Poor contact of the connector or FFC, or cable is defective.
No
54 Replace FFC or cable.
NG
Check the communications around the IC9101 and between the IC9101
and the microcomputer. If there was no ploblem, replace MAP5601M.
Poor contact of the connector or
Yes
FFC, or cable is defective.
Replace FFC or cable.
No
Is a signal output from IC8401 of
the MAIN Assy?
57
Yes
Check around IC8401 and repair
the failure points.
No
Check between input terminal and
IC9101 and repair the failure points.
50
NG
Replace the cables.
No Check between IC9101 and
CN8801 and repair the failure points.
50
57
IC9101 - pin 108
V: 1 V/div H: 10 μS/div
3
4
NG Replace the IC6001 and
repair the failure points.
No
Repare the DTB block.
4