Yamaha RX-V100D Service Manual page 16

RX-V100D
Cause: DC output of the power amplifier is abnormal.
Supplementary information: The abnormal voltage is displayed in % based on 5V as 100%.
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.
Cause: The temperature of the heat sink is excessively high.
Supplementary information: The abnormal voltage is displayed in % based on 5V as 500.
Turning on the power without correcting the abnormality will cause the protection function to work 1 second later and the
power supply will be shut off.
* Additional causes of protection can be due to loose connections, associated components, Microprocessor, etc.
* For the protection voltage value, refer to DIAG menu No.11 described later.
• History of protection function
When the protection function has worked, its history is stored in memory with a backup. Even if no abnormality is noted
while servicing the unit, an abnormality which has occurred previously can be defined as long as the backup data has
been stored.
The history of the protection function is cleared when DIAG is cancelled by selecting PRESET RESERVED (Memory
initialized) of DIAG menu No.10 or when the backup data is erased.
• Display during menu operation
During the DIAG operation, the function at work is indicated on the FL indicator. The contents displayed during the function
operation are described in the later section on details of functions.
16
When there is a history of protection
function due to abnormal DC output
Voltage display in %
When there is a history of protection
function due to excessive heat sink
temperature
Voltage display in %
Version (1 alphabet)
Version (1 alphabet)