Pioneer PDP-507XC Service Manual page 15

1
Flowchart of Failure Analysis for The Video-system Assy
No video from composite,svideo
COMP/S Image for the composite or S-video
input is not displayed.
YES YES
Is any function which inputs signal selected
with the input selector?
YES YES
Is the Compornent cable is connect to
jack?(Input1,Input2)
YES YES
What is the selected function ?
Othres Othres
Has the signal arrived at IC4701?
YES YES
Which signal is not output, main or
sub signal?
MAIN MAIN
Is a signal output from IC4701?
(42)(45)
YES YES
Has the signal arrived at IC5101?
(148)(158)
YES YES
Is the communication between each IC
(VDEC, ASIC) on the MAIN Assy and
the microcomputer normal?
YES YES
Has the symptom been settled when the
MAIN Ass'y is replaced?
YES YES
Replace the MAIN Assy.
• Waveforms
Composite or S terminal PAL Color Bar input
IC4701 (60)or(72)or(85)or(91)
10 11
V:500mV/div H:20 sec/div
capture in process Trigger detection Stop
Even number
IC4701 (47)
15 16
V:500mV/div H:20 sec/div
Stop Stop
1
2
NO NO Select a designated input with the input
selector.
NO NO
Disconnect Component and confirm again.
Input3 Input3
YES YES
Is the HDMI INPUT selected Disable?
NO NO Check the FFC between CN8801 and
CN4004 or between CN9003 and CN4005,
10
the cables between CN9001 and CN9202
or between CN9002 and CN9205, and
check around the input terminal.
SUB SUB
Check around IC4701 and the
NO NO communication between IC4701 and
8 9
microcomputer. If there is no problem,
replace the MAIN Assy.
Check the emitter-follower circuit
NO NO
between IC4701 and IC5101 and repair
10 11
the failure points.
Check the IC that is found to have failure
NO NO
in communication and around the
microcomputer. If there is no problem,
replace the MAIN Assy.
NO NO
The panel is defective.
IC4701 (42) IC4701 (45)
12
V:500mV/div H:20 sec/div V:500mV/div H:20 sec/div
Stop
IC4701 (49) IC5103 (1)
17
V:500mV/div H:20 sec/div V:500mV/div H:20 sec/div
Stop
2
3
NG NG
Replace TANSHI Ass'y
NO NO
HDMI INPUT selected Disable.
NG NG Replace the FFC or
cables.
Is the screen of main side Analog/Digital TV?
YES YES
Is a signal output from IC4701?
NO NO
(47)(49)
YES YES
Has the signal arrived at IC5103?
(1)(2)
YES YES
IC5101 (148)
13
V:500mV/div H:20 sec/div
Stop
IC5103 (2)
18
V:500mV/div H:20 sec/div
Stop
PDP-507XC
3
4
NG NG It is specified that the image is not
displayed in the sub side.
12 13
Check the emitter-follower circuit
NO NO
between IC4701 and IC5103 and
14 15
repair the failure points.
IC5101 (158)
14
V:500mV/div H:20 sec/div
Stop
4
A
B
C
D
E
F
15