Pioneer PDP-LX508A, Service Manual

Page: 29 / 153

PDP-508XG
29
5 6 7 8
5 6
7
8
C
D
F
A
B
E
Yes
N o
Yes
Yes
N o
Has the so u nd of the Analog
b roadcasting o u tp u t?
Is a SIF signal inp u t to IC9101?
(pin 6 8 )
Check the comm u nications aro u nd the IC9101 and b et w een the IC9101
and the microcomp u ter. If there w as no plo b lem, replace MSP5651M.
Check the comm u nications b et w een
the U6001 and the microcomp u ter
and b et w een the U6001 and IC9101.
N G Replace the U6001 and
repair the fail u re points.
Yes
N o
N o
N o
N o
Has the so u nd of the HDMI
o u tp u t?
Is a SPDIF signal o u tp u t from
IC5201? (pin 7 8 )
Check the comm u nications aro u nd the IC9101 and b et w een the IC9101
and the microcomp u ter. If there w as no plo b lem, replace MSP5651M.
Check the FFC and ca b les b et w een
the MAI N Assy and TA N SHI Assy.
Does not so u nd o u tp u t e v en if replace
them?
Poor contact of the connector or
FFC, or ca
b le is defecti v e.
Replace FFC or ca b le.
Replace the IC5201.
Yes
Yes Yes
N o
Poor contact of the connector or FFC, or ca b le is defecti v e.
Replace FFC or ca b le.
Yes
N o
Has the so u nd of the Digital
b roadcasting o u tp u t?
Yes
N o
Has the so u nd of the analog RCA
and PC inp u ts o u tp u t?
Is a I2S signal inp u t to IC9101?
(pins 106 to 10 8 )
Yes
Is a SPDIF signal inp u t to
IC9101? (pin 4)
Check the comm u nications aro u nd the
IC9101 and b et w een the IC9101 and
the microcomp u ter. If there w as no
plo b lem replace the MAI N Assy.
Is a signal o u tp u t from IC 8 401 of
the MAI N Assy?
N o
Repare the DTB b lock.
Check aro u nd IC 8 401 and repair
the fail u re points.
Check b et w een inp u t terminal and
IC9101 and repair the fail u re points.
DT V model only
Yes
Yes
N o
Is a signal inp u t to IC9101?
(pins 24 to 27, 32 to 35)
Check the comm u nications aro u nd the IC9101 and b et w een the IC9101
and the microcomp u ter. If there w as no plo b lem replace the MAI N Assy.
Check the comm u nications aro u nd the IC9101 and b et w een the IC9101
and the microcomp u ter. If there w as no plo b lem replace the MAI N Assy.
Check b et w een IC9101 and
C N88 01 and repair the fail u re points.
N o
Is a signal inp u t to IC9101?
(pins 30, 31)
A
N o
Has the so u nd of the side inp u t
o u tp u t?
Replace the ca b les.
N G
Check the ca b les b et w een C N88 01
and C N 9351, and check aro u nd
the pin jack.
OK
54
Waveforms
55 56 57
IC5201 - pin 7 8
V : 1 V /di v H: 1
μ
S/di v
IC9101 - pin 106
V : 1 V /di v H: 10
μ
S/di v
IC9101 - pin 107
V : 1 V /di v H: 10
μ
S/di v
IC9101 - pin 10 8
V : 1 V /di v H: 10
μ
S/di v
Inp u t signal: L/R 1 kHz, 0.5 V rms ( V OL 30)
54
54
57 56
50 49
50 49
55
N G
Check that the HDMI s w itch of the
ME N U is properly set.