Yamaha AVR-S80 Service Manual

Also see for AVR-S80: Owner's manual

Contents

AVR-S80/NX-SW8019AVR-S80/NX-SW80Cause: The voltage in the power supply section isabnormal.Supplementary information: The abnormal voltage isdisplayed in % based on 5V as 100%.Turning on the power without correcting the abnormalitywill cause the protection function to work 1 second laterand the power supply will be shut off.When there is a history of protectionfunction due to abnormal voltage inthe power supply section Version (1 alphabet)Voltage display in %Note)• Applying the power to a unit without correcting theabnormality can be dangerous and cause additionalcircuit damage.• The output transistors in each amplifier channelshould be checked for damage before applying anypower.• Amplifier current should be monitored by measuringacross the emitter resistors for each channel.* Additional causes of protection can be due to loosec o n n e c t i o n s ( i n c l u d i n g g r o u n d ) , a s s o c i a t e dcomponents, CPU, etc.• Display during menu operationDuring the DIAG operation, the function at work isindicated on the FL indicator. The contents displayedduring the function operation are described in the latersection on details of functions• History of protection functionWhen the protection function has worked, its history isstored in memory with a backup. Even if no abnormalityis noted while servicing the unit, an abnormality whichhas occurred previously can be defined as long as thebackup data has been stored.The history of the protection function is cleared whenDIAG is cancelled by selecting PRESET RESERVED(Memory initialized) of DIAG menu No.9 or by selectingPrt His < DEL (Protection history deletion reserved) ofsub-menu 6 of DIAG menu No.15 and the backup datais erased.