Pioneer PDP-507XC Service Manual page 19

1
Flowchart of Failure Analysis for The Video-system Assy
DTV doesn't work
Digital broadcasting is not
DTV
received.
YES
Is any function which inputs signal selected with
the input selector?
YES
Has the symptom settled when the Digital RF IN
terminal and input cable are checked ?
NO
Is the power-supply voltage of CN4017 normal?
YES
Is RESET_DT(IC8401 159pin) High?
YES
Do you communicate by TXD_DT(IC8401:103)
and RXD DT(IC8401:102)?
YES
Is a signal output from CN4013?
YES
Is the signal input from CN4013 to IC8001?
YES
Has the symptom settled when the DTB Assy is
replaced?
NO
Has the symptom been settled when the MAIN
Ass'y is replaced?
YES
Finishing troubleshooting
1
2
NO
Select a designated input with the input selector.
YES Poor contact of the terminal part or input cable
is defective.
NO Check between CN4017 and P3,P8
(Power Supply).
NO
Check between IC8401(159pin) and CN4014.
NO
Check between IC8401(102,103) and CN4014.
NG
Replace DTV Ass'y
NO
Check between CN4013 and IC8001.
YES The DTB Assy is defective.
Replace the DTB Assy.
NO
The panel is defective.
PDP-507XC
2
3
NG
Replace Main Ass'y
3
4
A
B
C
D
E
F
19
4