Board LEDS
This section describes the functions of the LEDs on the most important PCBs.
PSU, MCU, IPU
PSU LEDs
The PSU supplies dc current to electrical components and also controls the flow of ac current to the fusing
lamp, dehumidifiers (x4), and anti-condensation heaters (x2).
No.
Color
Meaning
Vaa +24 V
GREEN
ON
Normal
OFF
• PSU defective, or the +24 V system has shorted or is
defective.
Vca2 –12 V
GREEN
ON
Normal
OFF
• PSU defective, or the –12 V system has shorted or is
defective.
Vca2 +12 V
GREEN
ON
Normal
OFF
• PSU defective, or the +12 V system (HDD) has shorted
or is defective.
Vcc +5.1 V
GREEN
ON
Normal
4. Troubleshooting
222
4
Summary of Contents for Neptune-P1
Page 1: ...Neptune P1 Machine Code G180 SERVICE MANUAL June 2007 Subject to change...
Page 103: ...1 Installation 102 1...
Page 114: ...Rear Cover 1 Rear cover x 2 A 2 Controller cover B x 1 Paper Exit Unit Common Procedures 113 3...
Page 177: ...3 Remove the SFDB A x 2 x 2 standoffs x 2 3 Replacement and Adjustment 176 3...
Page 180: ...4 Remove the cooling fan D x3 x1 Others 179 3...
Page 402: ...Toner End Recovery Flow Chart Development 401 6...
Page 449: ...6 Details 448 6...
Page 457: ...MEMO 456...