Hitachi 42HDS52A, Service Manual

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㪛㫀㪾㫀㫋㪸㫃㩷㪤㫆㪻㫌㫃㪼
㪛㫀㪾㫀㫋㪸㫃㩷㪪㫌㪹㩷㪧㪮㪙
Digital Main P.W.B has five LED (KNIGHT RIDER) on board.
After Power ON by POWER_1(6pin of PPT3), these LED will be turned on
in sequence as follows. It may take a few seconds for the sequence.
LED sequence
Sequence D302
(Red)
<PiO04>
D303
(Green)
<PiO03>
D304
(Yellow)
<PiO02>
D305
(Orange)
<PiO01>
D306
(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.
Location of LEDs
11.1 TROUBLE SHOOTING for DIGITAL MODULE (Device error check)
L
ED1 (D306)
LED2 (D305) LED3 (D304) LED4 (D303)
L
ED5 (D302)
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DW1U
TABLE OF CONTENTS
11. TROUBLESHOOTING FLOW CHARTS
6 GI