Sony DNW-A75 Maintenance Manual page 58

2-11. Function of LEDs on Circuit Boards
SDI-41 board
(Suffix -14 and higher)
TBC-23A board
D200
DM-89 board
D902
EQ-75 board
DM-89 board
LED No. Name
D902 ADJUST
EQ-75 board
LED No. Name
D900 —
D903 —
D904 —
TBC-23A board
LED No. Name
D200 TBC
2-20
D902 D905
D903 D900 D904
Color Description
Amber Usually lights for scores of milliseconds at intervals of about one second.
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 Blinks during the EQ microcomputer is under normal operation.
Lights in the following cases:
. NV-RAM checksum error (when writing/reading in power-on)
. NV-RAM verify error (when saving NV-RAM)
. INNER ECC status error
. REC data parity error
. Not satisfied requirements in auto-alignment
(exclusive of failure and NG)
. Not started communications with SYSCON
Red Lights in REC mode.
Green Lights in Analog Playback mode.
(The unit automatically switches to analog playback mode and light the
indicator when the cassette is ejected.)
Color Description
Amber Lights once a second when TBC microcomputer is under normal
condition.
The locations of the LED indicators of
SDI-41 board (suffix -11 and -13) and
shown in the following figures.
SDI-41 board (Suffix -11)
D300 to D305, D900, D901
SDI-41 board (Suffix -13)
D900 D901
Normal state
Blinks
Normal State
Blinks
On/Off
On/Off
Normal state
Blinks
DNW-A75/A75P