Hitachi Director's P60X901, Service Manual

Page: 58 / 143

TABLE OF CONTENTS
DW
3
U
DW3 TROUBLESHOOTING FLOW CHARTS
5
7
[Power Supply troubleshooting]
㧖 ) Power-On control signals for Power Supply Unit (PSU here after)
(1) AC (Master Power) switch : ON
Æ
PSU outputs STBY+5V CN63 pin 1 and STBY +3.3V CN63 pin 3.
(2) PoWER_1 (+3.3V CN63 pin 6) : High
Æ
PSU o5.6V.
(3) PoWER_2 (+3.3V CN63 pin 7) : High
Æ
PSU o10V and +12V.
(4) Vcego (+2.69V CN68 pin 7) : High Æ PSU outputs Vcc+5.1V for PDP Panel.
(5) Vsago (+2.69V CN68 pin 8) : High Æ PSU outputs Va and Vs for PDP Panel.
If any control signal does not rise, Power Supply can not output the voltage.
࡮
PoWER_1 or _2 : does not rise ----- Suspect Main-Digital PWB trouble or connection.
࡮ Vcego/Vsago : does not rise ----- PDP Panel Module (Suspect Logic PWB) trouble or connection.
However, Vcego should rise when PNLRST (Connector EC01 pin 43 at Main-Digital board) outputs a High and
Vsago should rise when PNLoN (Connector EC01 pin 42 at Main-Digital board) also outputs a High. (See page 61 diagram)
Does Power Indicator
blink Red?
Video Power Save Mode
(Input:1
㨪
3, Front Input have no signal)
Yes
No
No Power or
(No picture, and No sound)
No
Fan Alarm
- FAN connector disconnected, FAN trouble
or Regulator circuit (IP03 on Terminal PWB) trouble
Yes
Check Power Supply Unit. ( 㧖5GGPQVGUDGNQY also check Fuse
or AC-Inlet / Connector
Is Power Indicator
lit Orange?
Is Power Indicator
Lit?
Does Power Supply Unit
5V?
Yes
Check Main-Digital board.
No
No
Yes
Power Indicator
blue is lighted normally.
Check Power Supply Unit. (
㧖
Does Power Supply Unit
10V/12V?
No
Yes
Check Power Supply Unit. (
㧖
Does Power Supply Unit
output Va/Vs?
No
Yes
Check Main-Digital board
or Terminal PWB
Does PDP Burn-In mode
operates normally?
Check PDP module.
No
Yes
Does Power Indicator
blink Blue?
No
PDP Module Alarm
- Refer to the page “PDP Panel self-diagnosis function” page 57.
Yes
For
SBY
+5V
, c
heck
C
N63
p
in
1
(Always
p
resent
w
ith
A
C)
Note: Power_1 and Power _2 are high
for the about 2 minutes when AC
is first applied or always high
if "Stand-By Mode" is turned on
in Customer's Menu.
Burn-In mode = menu-menu-menu-9-select
pressed slowly. Repeat to Exit.
After pressing
power On.
Check powe r s upply fo r damage (C r ack s )and S DR IC' s fo r P i n Hole s .
CH 2