Yamaha MCR-330, Service Manual

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CRX-330/NS-BP100
CRX-330/NS-BP1
0
0
N o P r o t e c t i o n 1 - 1 V E R : C 0 0 5
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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 self-diagnostic function is cancelled by selecting PRESET RSRV
(Memory initialized) of main menu B or when the backup data is erased.
Note)
• Applying the power to this unit without correcting the abnormality can be dangerous and cause additional circuit
damage.
To avoid this, if protection function has been activated 3 times continuously, 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
reconnect it again.
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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 MAIN CPU
VERSION of main menu 1. ROM VER/SUM) a few seconds later.
When there is no history of protection function:
After a few seconds
Main menu display Opening message
D - A M P E r r o r
P S 1 ( A D : x x x H )
P S 2 ( A D : x x x L )
When there is a history of protection function:
When there is a history of protection function due to abnormal amplifier section
For details of protection functions, refer to the main menu No. 7-1 PS1/PS2.
A/D conversion value of voltage
A/D conversion value of voltage
When there is a history of protection function due to abnormal voltage in the power supply section
H: High
L: Low
H: High
L: Low