Yamaha RX-Z11 Service Manual page 43

Cause: The voltage in the power supply section is abnormal.
Supplementary information: The abnormal voltage is
displayed in based on 5V as 255.
Turning on the power without correcting the abnormality
will cause the protection function to work in 1 second and
the power supply will be shut off.
Cause: DC output of the power amplifier is abnormal.
Supplementary information: The abnormal voltage is
displayed in based on 5V as 255.
Turning on the power without correcting the abnormality
will cause the protection function to work in 6 seconds and
the power supply will be shut off.
Cause: The temperature of the heat sink is excessive.
Supplementary information: The abnormal voltage is
displayed in based on 5V as 255.
Turning on the power without correcting the abnormality
will cause the protection function to work in 1 second and
the power supply will be shut off.
* Additional causes of protection can be due to loose
connections, associated components, Microproces-
sor, etc.
* For the protection voltage value, refer to main menu
No. 11 described later.
When there is a history of protection
function due to abnormal voltage in
the power supply section
DIAGNOSTIC
PSx:000
A/D conversion value of voltage
When there is a history of protection
function due to abnormal DC output
DIAGNOSTIC
DC1:000
A/D conversion value of voltage
When there is a history of protection
function due to excessive heat sink
temperature
DIAGNOSTIC
TMx:000
A/D conversion value of voltage
H
H
H
RX-Z11/DSP-Z11
43