Ricoh B296 MP3500 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 |