Denon AVR-3310CI Service Manual page 65

4. Power AMP (8U-110062, 8U-110063)
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No sound is output
The protector operates.
YES
Is the power transistor open or short circuit?
DHCT A3/C3
NO
Is the emitter resistance of the power
transistor open?
0.22
NO
Is the base resistance of the power
transistor open?
220
NO
Is trimmer potentiometer between the base
of the power transistor open?
300
NO
Is the zener diode and diode which are
connected with the base of a power
transistor short-circuited?
HZS6A-1
1SS133
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L 13942296513
NO
Is other transistor trouble?
NO
Is other resistance trouble?
Turn on power, check that voltage of the section is normal and that idling electric current is
flowing.
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YES
Replace the power transistor.
YES
Replace the emitter resistance.
YES
Replace the base resistance.
YES
Replace the trimmer potentiometers.
YES Replace the Zener diode and the
diode.
YES
Replace the transistor.
YES
Replace the resistance.
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AVR-3310CI/AVR-3310/AVR990/AVC-3310
http://www.xiaoyu163.com
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