Diagnosis Information; The Flow Of Diagnosis - Pioneer PDP-507CMX Service Manual

5

5. DIAGNOSIS INFORMATION

5.1 THE FLOW OF DIAGNOSIS

Flowchart of Failure Analysis for The Whole Unit
START
Problems concerning STB status
Is the STB LED lit?
Yes
Problems concerning the power
Can the unit be turned on
(Relay ON)?
Yes
A shutdown occurs.
No
A power-down occurs.
No
As to the diagnosis of DD Assy, refer to "Flowchart of Failure Analysis for the DD Assy".
As to the diagnosis of SLOT power supply, refer to "Flowchart of Failure Analysis for the SLOT Powwer Supply".
Problems concerning lighting of the panel
Does the screen display reset
lighting?
Yes
Is the panel arbitrary turned on or
off repeatedly? Or do luminescent
spots appear on the screen?
No
Is there any local abnormality
on the screen?
No
A
5
6
No
Is STB 3.3 V power supplied?
Yes
Is the voltage at AC_DET on the
POWER SUPPLY Unit high?
Yes
Failure analysis for the
MAIN Assy. ⇒ ST1
No
Is the power shutdown?
Yes
Yes
See "Shutdown diagnosis." ⇒ SD
Yes
See "Power-down diagnosis." ⇒ PD
No
Is the drive off?
No
Failure analysis for the
drive system ⇒ DR1
Yes
Failure analysis for the
POWER SUPPLY Unit. ⇒ PS3
Failure analysis for the
drive system ⇒ DR2
Yes
Yes
Is the abnormality associated
with one address or one TCP?
Yes
Failure analysis for the
drive system ⇒ DR3
6
7
Check if the cable between
No
CN304 and P12 that connects the
POWER SUPPLY and DD Assys
is firmly connected.
No
Replace the POWER SUPPLY
Unit.
Is the voltage at the RELAY port
of the connectors between the
No
DIGITAL and POWER SUPPLY
Assys H (3.3 V)?
Yes
Failure analysis for the
POWER SUPPLY Unit. ⇒ PS2
A power-down will not be generated if the drive is off.
Yes
Turn the drive on.
In a case where luminescent spots appear
or the panel is repeatedly turned on or off
In a case where luminescent spots appear
No
Is the abnormality associated
with a single scan line?
Yes
Failure analysis for the
drive system ⇒ DR4
PDP-507CMX
7
8
NG
Failure analysis for the
POWER SUPPLY Unit. ⇒ PS1
No
Replace the MAIN Assy.
• Check the DRF SW.
• Before turning the drive off with the RS-232C
commands or using the remote control unit,
turn the unit off.
No
Replace the panel chassis.
8
A
B
C
D
E
F
87