Sony DNW-A75 - 2-11. Function of LEDs on Circuit Boards

2-18
DNW-A75/A75P
2-11. Function of LEDs on Circuit Boards
2-11. Function of LEDs on Circuit Boards
SS-83 board
LED No. Name Color Description Normal state
D108 SV Green
*1
Represents the result of communication test of ROM and RAM in power-on Blinks
by blinking pattern. (Refer to followings.)
D112 TRVR Green
*1
Lights when the tracking VR is enable. Off
D301 DRUM Green
*1
Blinks when the drum microcomputer (IC314) operates normally. Blinks
Usually lights for 30 milliseconds at intervals of 1.1 to 1.5 second.
The blinking interval is inverted when the drum is locked.
D1102 SY1 STS1 Green Blinks when SYS1 CPU operates normally. Blinks
D1103 SY1 STS2 Green Lights in good communications between SYS1 CPU and KY MPU (KY-438 board). On
Turns off in bad communications between SYS1 CPU and KY MPU.
D1104 MAINTE Green Lights during executing maintenance mode. Off
D1105 SY1 ERR Red Lights when SYS1 CPU does not operate normally. Off
Blinks in bad communications between SYS1 CPU and other CPU/MPU
(SYS2, KY, etc.).
D1902 SY2 STS1 Green Blinks when SYS2 CPU operates normally. Blinks
D1903 SY2 STS2 Green Lights in good communications between SYS2 and SV CPUs. On
Turns off in bad communications between SYS2 and SV CPUs.
D1904 SY2 STS3 Green Lights in good communications between SYS2 and SYS1 CPUs. On
Turns off in bad communications between SYS2 and SYS1 CPUs.
D1905 SY2 ERR Red Lights when SYS2 CPU does not operate normally. Off
Blinks in bad communications between SYS2 CPU and other CPU
(SYS1, SV, etc.).
D2703 DT Green
*1
Blinks when DT MPU (IC2700) operates normally. Blinks
*1: When the SS-83 board is suffix -11 or -12, “Color” is Amber.
D1905
D1904
D1903
D1902
D108
D301
D112
SS-83 board (Suffix -13 and higher)
D1104
D1105
D1103
D1102
D2703
D1905
D1904
D1903
D1902
D112
D301
D108
SS-83 board (Suffix -11, -12)
D1105
D1104
D1103
D1102
D2703