Pioneer PDP-5010FD, Service Manual

Page: 45 / 187

PDP-5010FD
45
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5.2 DIAGNOSIS FLOWCHART OF FAILURE ANALYSIS
5.2.1 WHOLE UNIT
Flowchart of Failure Analysis for The Whole Unit
START
Is the STB LED lit?
Is STB 3.3 V power supplied?
(Check the power at the IF micro-
computer on the MAIN Assy.)
Can the unit be turned on
(Relay ON)?
Is the panel arbitrary turned on or
off repeatedly? Or do luminescent
spots appear on the screen?
Is the power shutdown?
A shutdown occurs. See "5.4 DIAGNOSE OF SD (SHUTDOWN)."
Are the voltages at AC_DET and
MSW_DET on the POWER
SUPPLY Unit high?
Replace the POWER SUPPLY
Unit.
Check if the cable that connects
the POWER SUPPLY and MAIN
Assys is firmly connected.
If a module microcomputer does not set a
relay in High, there is a possibility that a
main microcomputer does not issue a
command (PON).
A power-down will not be generated if the drive is off.
• Check the DRF SW.
• Before turning the drive off with the RS-232C
commands or using the remote control unit,
turn the unit off.
In a case where luminescent spots appear
or the panel is repeatedly turned on or off
In a case where luminescent spots appear
Is the voltage at the RELAY port
of the connectors between the
DIGITAL Assy and POWER
SUPPLY Unit H (3.3 V)?
No
No
Is the drive off? Turn the drive on.
Is the abnormality associated
with a single scan line?
No
Yes
Yes
Yes
Yes
A power-down occurs.
Does the screen display reset
lighting?
Is there any local abnormality
on the screen? Is the abnormality associated
with one ADDRESS or one TCP?
See "5.3 DIAGNOSE OF PD (POWER-DOWN)."
Yes
No
No
No
Yes
No
No
NG
No
Yes
Yes
Yes
Yes
No
No
Yes
No
Yes
Yes
No
Yes
Problems concerning STB status
Note: Check that the Main power SW is ON side.
Problems concerning the power
Problems concerning lighting of the panel
Failure analysis for the
MAIN Assy => MA1
Failure analysis for the
MAIN Assy => MA2
Failure analysis for the
POWER SUPPLY Unit => PS1
Failure analysis for the
POWER SUPPLY Unit => PS2
Failure analysis for the
POWER SUPPLY Unit => PS3
Failure analysis for the
drive system => DR1
Failure analysis for the
drive system => DR2
Failure analysis for the
drive system => DR3 Failure analysis for the
drive system => DR4
Yes
No
Replace the panel chassis.
A
The green LED on the DIGITAL Assy indicates ON/STB
of the panel and causes for a power-down or shutdown.
If neither the green nor red LED lights, it is likely that the
power to the STB system is not supplied. (failure, PASV-STB status)
If AC_DET or MSW_DET is Low, LED goes off.