Sony DNW-A100 Maintenance Manual page 82

2-11. Information of LEDs on Circuit Boards
DIF-42 board
TBC-23 board
DM-89 board
DM-89 board
LED No. Name
D902 ADJUST
TBC-23 board
LED No. Name
D200 TBC
2-20
Upper
Lower
D100, D104 D108 - D115, D703, D705 - D707, D709 - D712, D714
D200
D902
Color Description
Amber Usually lights for scores of milliseconds at intervals of about 1 s.
The blinking interval is inverted when the DM-89 board is in the
adjustment mode: when switch S901-No.1 on DM-89 board is set to ON.
Color Description
Amber Lights once a second during TBC microcomputer (on TBC-23 board)
under normal condition.
D713
Normal state
Blinks
Normal state
Blinks
DNW-A100/A50/A45
DNW-A100P/A50P/A45P