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7 Trouble shooting guide
7.1.
How to identify SOS Blinking Signal
[Function]
When an abnormality has occurred in the PDP module, the protection circuit operates and reset to the stand-by mode. At the
same time, the defective P.C.Board can be indicated by the number of the pulse at Pin 3(LED_R) of D8 connector on D8 Board.
By using this tool (V1 board), the indication of pulse is shown to the blinking of red LED.
(Pluse High = LED light, Pulse Low = LED light off)
Tool name
V1 board
Lead Wire (D8-V34)
[How to check]
Connect the V1 board to D8 connector on D board, and turn on the power (SS34) of PDP module.
If power is shut down by protection circuit, the red LED of V1 board will be shown as blinking.
(Refer to Fig. A)
(If the unit keeps power on, the green LED of V1 board will be lighting.)
7.2.
Timing Chart of LED Blinking
1. Subject
Information of LED Blinking timing chart.
Part number
Supply period
TNPA3199
until end of DEC ./2005
TXJV340MMS
until end of DEC ./2005
Normal spare part route (chargeable)
Normal spare part route (chargeable)
9
MD-42HM8 SERIES
Supply route
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