HCD-M40D/M60D/M80D
30
MOTHERBOARD Mount
Ampli
fi
er Diagnosis Flow (2/3)
2. The sound is not outputted
Check that the signal is input to IC2001 pin 25 (all model), pin 24
(M60D/M80D) and pin 26 (M80D).
Check that the PWM signal is outputted from the following pins.
IC2001:
M40D pin 38, 39, 40, 41
M60D pin 38, 39, 40, 41, 42, 43, 48, 49
M80D pin 38, 39, 40, 41, 42, 43, 48, 49, 55, 56
Check that the signal is outputted from IC2002 pin 35 and 39 (SPEAKER FRONT L)
pin 27 and 32 (SPEAKER FRONT R).
Check that the signal is outputted from IC3503 pin 35, 39, 27 and 32 (SPEAKER
WOOFER R) (M60D/M80D).
The s
ound
is not out
putt
ed.
MOTHERBOARD
board damaged. Exchange the complete MOTHERBOARD Board.
MOTHERBOARD
board damaged. Exchange the complete MOTHERBOARD board.
Exchange IC2001.
Exchange IC2002.
Exchange IC3503.
Exchange IC3502.
Exchange IC3501.
Check that the signal is outputted from IC3502 pin 35, 39, 27 and 32 (SPEAKER
WOOFER L) (M60D/M80D).
Check that the signal is outputted from IC3501 pin 35, 39, 27 and 32 (SPEAKER
SUBWOOFER) (M80D).
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
