Sony BVW-55 Maintenance Manual page 45

SV-206 Board
SV-206 board
D201
D108
D107
D106
Ref.No. Indicator name Color
D106 SV Green
D107 Yellow Not used
D108 TRVR Yellow Not used
D200 DRUM Green
Blinking pattern of D106
Normal state
On
Off
0.03 s
1.1 to 1.5 s
RAM error
On
Off
some 10
milliseconds
0.5 s
System control dual port RAM error
On
Off
some 10
milliseconds
0.5 s
BVW-55
Description
Indicates by changing blinking intervals the result of
communication check to ROM and RAM at power on
(See illustration below)
Blinks during drum microcomputer (IC212) operation
Normally blinks for 30 milliseconds at intervals of about 1 sec.
When the drum is locked, the blink is inverted
1.1 to 1.5 s
0.1 s
0.5 s
0.1 s
0.5 s
1-10. Description on Internal Indicators
Normal state
Blinking
Off
Off
Blinking
Repeated
0.5 s Repeated
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