HCD-M40D/M60D/M80D
29
MOTHERBOARD Mount Amplifi er Diagnosis Flow (1/3)
1. “PROTECT3” is displayed after turning the power on
Check that IC3503 pin 27, 32, 35 and 39 is short to GND/PVDD (M60D/M80D).
“
PROTECT3” is displayed on the screen display panel after turning the power on.
“PROTECT3” is not displayed, when removing the speaker and turning the power on.
Check that IC2002 pin 27, 32, 35 and 39 is short to GND/PVDD.
Check and replace the speaker.
Exchange IC2002.
Exchange IC3501.
Exchange IC3502.
Exchange IC3503.
MOTHERBOARD board damaged. Exchange the complete MOTHERBOARD board.
Check that IC3501 pin 27, 32, 35 and 39 is short to GND/PVDD (M80D).
Check that IC3502 pin 27, 32, 35 and 39 is short to GND/PVDD (M60D/M80D).
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
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