Hitachi 42HDS69 - 42" Plasma TV, Service Manual

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Digital Main P.W.B has five LED (KNIGHT RIDER) on board.
After Power ON these LED will be turned on
in sequence as follows.
It may take a few seconds for the sequence.
LED sequence
Sequence D
205
(Red)
<PiO04>
D
204
(Green)
<PiO03>
D
203
(Yellow)
<PiO02>
D
202
(Orange)
<PiO01>
D
2
0
1
(Red)
<PiO00>
1 (Start)
○ ○ ○ ○ ●
2
○ ○ ○ ● ●
3
○ ○ ● ● ●
4
○ ● ● ● ●
5 (End)
○ ○ ○ ○ ○
○
is turn off the LED,
●
is Lighting the LED
After Program is loaded without error, all LED will be turned off.
Any LED should not light.
If some errors occur, LED will show the error pattern.
(1) Check that LED is not lit.
(2) If LED is lit, refer to the following table and check the involved devices.
TROUBLE SHOOTING for DIGITAL MODULE (Device error check)
TABLE OF CONTENTS
TROUBLESHOOTING FLOW CHARTS
Location of LEDs
Digital Main Board
LED5 (D205) LED1(D201)
LED4 (D204) LED2 (D202)
LED3 (D203)
(42” only)
51
DW
2
U