Sony DNW-A22 Maintenance Manual page 74

Digital videocassette player
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3-2. Details of Error Messages
ERROR-97
SV NV-RAM ERROR
(SV NV-RAM)
Description:
The abnormal operation of an NV-RAM (MS-50 board) for the servo system was
detected.
Detecting condition:
When the checksum of NV-RAM data does not coincide during activation.
Sub error message:
None
Possible cause:
NV-RAM (IC9 on MS-50 board) trouble
Protecting operation:
Enters the protection mode.
ERROR-98 RF NV-RAM ERROR
(RF NV-RAM ERROR)
Description:
The abnormal operation of an NV-RAM (EQ-56, DM-89, or TBC-23 board) for
RF system was detected.
Sub error messages and Detecting conditions:
EQ:
DM: When the error occurs in an NV-RAM (IC908 on DM-89 board) during
TBC: When the error occurs in an NV-RAM (IC200 on TBC-23 board) during
Possible causes:
Trouble of an NV-RAM indicated by sub error message
Protecting operation:
None
3-18
When the error occurs in an NV-RAM (IC900 on EQ-56 board) during
the data write or read.
the data write or read.
the data write or read.
DNW-A22/A22P

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