Yamaha RX-V465 Service Manual
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Brand: Yamaha
Category: Receiver , Stereo Receiver
Type: Service manual
Model: Yamaha HTR-6240 , Yamaha RX-V465 , Yamaha AX-V465
Pages: 147
38
RX-V465/HTR-6240/
AX-V465
RX-V465/HTR-6240/AX-V465
● Display provided when Self-Diagnostic
Function started
The FL display of this unit displays the protection
function history data then the main menu (sub-menu
“1. ANALOG BYPAS” of main menu No. 1 BYPASS) a
few seconds later.
When there is no history of protection function:
When there is a history of protection function:
Cause: An excessive current flowed through the power
amplifier.
Supplementary information: As current of the power
amplifier is detected, the abnormal channel can be
identified by checking the current detect transistor.
Turning on the power without correcting the abnormality
will cause the protection function to work immediately and
the power supply will instantly be shut off.
After a few seconds /
Main menu display / Opening message /
When there is a history of protection function due to excess current
AD value when the protection function is working/
Note)
• Applying the power to this unit without correct-
ing the abnormality can be dangerous and cause
additional circuit damage. To avoid this, if protec-
tion function has been activated 3 times continu-
ously, the power will not turn on even when the
“STANDBY/ON” key is pressed. In order to turn on
the power again, disconnect the power cable of
this unit from the AC outlet once and then recon-
nect it again.
• The output transistors in each amplifier channel
should be checked for damage before applying
power of this unit.
• Amplifier current should be monitored by mea-
suring DC voltage across the emitter resistors for
each channel.