Ricoh B297 MP4500 A-C4.5
Troubleshooting. Electrical Component Defects 3
LEDS
BICU LED Sequences
LED 101 (Green) |
LED 102 (Yellow) |
LED 103 (Red) |
|
---|---|---|---|
Normal Operation | Flashes | Off | Flashes |
System Startup | Flashes | On (1~2s) then Off | Flashes |
Firmware Update: Normal Execution | Flashes | On | Flashes |
Firmware Update: Error | Flashes | Flashes | Flashes |
Firmware Update: Normal End | Flashes | Off | Flashes |
Energy Save Mode | Off | Off | Off |
Controller LED Sequences
LED 1 (Red) |
LED 2 (Red) |
|
---|---|---|
System Startup (including Self-Diagnostics) | On | Off |
Self-Diagnostic Error | On | On |
Normal Operation | Flashes | Off |
Firmware Update: Normal Execution | Flashes | Flashes |
Firmware Update: Error | Off | Off |
Firmware Update: Normal End | On | On |
NOTE: LED 1 monitors Data Bus Bit 14, LED 2 monitors Data Bus Bit 15.
TEST POINTS
Controller Board
Number | Monitored Signal |
---|---|
TP1 | GND |
TP3 | GND |
TP6 | GND |
TP8 | DB0 RXD |
TP9 | DB0 TXD |
TP10 | GND |
TP11 | +5VE |
TP12 | GND |
TP13 | +5V |
TP14 | +5VE |
TP15 | GND |
TP16 | R_FGATE |
TP17 | W_FGATE |