Sony DNW-A220 Maintenance Manual page 45

SV-194 Board
SV-194 board
D201
D109
D108
D107
Ref.No. Indicator name Color
D107 SV Green
D108
D109 TRVR Yellow Lit when tracking VR operation is active (with S100-4 turned on) Dark
D201 DRUM Green
Blinking pattern of D107
Normal state
Lit
Unlit
0.03 s
1.1 to 1.5 s
RAM error
Lit
Unlit
some 10
milliseconds
0.5 s
System control dual port RAM error
Lit
Unlit
some 10
milliseconds
0.5 s
DNW-A220
DNW-A220P
Description
Indicates by changing blinking intervals the result of
communication check to ROM and RAM at power on
(See illustration below)
Not used
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
–––
Blinking
Repeated
Repeated
0.5 s
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