Display Provided When Diag Started - Yamaha rx-sl100 Service Manual

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3 7 63 1515 0

• Display provided when DIAG started

The FL display of the main unit displays the protection
function history data and the version (1 alphabet) and the
DIAG menu [sub-menu (ANALOG BYPASS) of DIAG menu
No.1 DSP THROUGH] 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
TE transistor is detected, the abnormal channel can be
L 13942296513
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.
Note)
• Applying the power to a unit without correcting the
abnormality can be dangerous and cause additional
circuit damage.
• The output transistors in each amplifier channel
should be checked for damage before applying any
power.
• Amplifier current should be monitored by measuring
across the emitter resistors for each channel.
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Cause: DC output of the power amplifier is abnormal.
Turning on the power without correcting the abnormality
will cause the protection function to work 3 seconds later
.
and the power supply will be shut off.
http://www.xiaoyu163.com
Opening message
When there is no history
of protection function
When there is a history of protection
function due to excess current
When there is a history of protection
function due to abnormal DC output
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2 9
8
DIAG menu display
Version (1 alphabet)
After a few seconds
Version (1 alphabet)
Q Q
3 6 7 1 3 1 5
Version (1 alphabet)
co
.
RX-SL100/RX-SL100RDS
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
17