Epson EPL-N3000 - Ros Assy

EPSON EPL-N3000/AcuLaser M4000N Revision C
Troubleshooting Troubleshooting for Individual Units 113
Confidential
3.4.3 ROS ASSY
Table 3-62. Troubleshooting for ROS ASSY
Step Action and Question Yes No
Parts below can be the source of this error (Chapter 4 Disassembly and Assembly)
•ROS ASSY (p.239)
• HARNESS ASSY ROS
• INTERLICK S/W 5V (p.247)
• HARNESS ASSY LVPS
•HVPS/MCU (p.301)
•LVPS (p.287)
1
Power supply to the Laser Diode of ROS ASSY.
1. Remove the COVER TOP ASSY (p.170)
2. Disconnect P/J140 from the ROS ASSY.
3. Install the Imaging Cartridge.
4. Close the COVER OPEN.
5. Check the voltage between J140-8 ↔ J140-7.
(Refer to “Connectors (p.406)”)
♦Is the voltage 5 VDC between J140-8 ↔ J140-7?
Go to Step 9 Go to Step 2
2
INTERLOCK S/W 5V
1. INTERLOCK S/W 5V (p.364)
2. While pushing and releasing the INTERLOCK S/W
5V, check continuity between P/J142-1 ↔ P/J142-
3.
♦Is there continuity between P/J142-1 ↔ P/J142-3
when the INTERLOCK S/W 5V is pressed and
discontinuity when it is released?
Go to Step 3
Replace the
INTERLOCK
S/W 5V
3
SWITCH I/L ASSY 5V
1. Remove the SWITCH I/L ASSY. (p.173)
2. While pushing and releasing the SWITCH I/L
ASSY 5V, check continuity between P/J144-1 ↔ P/
J144-3.
♦Is there continuity between P/J144-1 ↔ P/J144-3
when the SWITCH I/L ASSY 5V is pressed and
discontinuity when it is released?
Go to Step 4
Replace the
SWITCH I/L
ASSY 5V
4
HARNESS ASSY LVPS
1. Disconnect the P/J141.
2. Make certain that there is continuity between P/
J141-1 ↔ P/J141-3 when the INTERLOCK S/W
5V and SWITCH I/L ASSY 5V are pushed
simultaneously.
♦Is there continuity between P/J141-1 ↔ P/J141-3
when the INTERLOCK S/W 5V and SWITCH I/L
ASSY 5V are pushed simultaneously, and no
continuity when they are released?
Go to Step 5
Replace the
Harness Assy
LVPS
5
HARNESS ASSY ROS
1. Disconnect the connector P/J14 on the HVPS/MCU.
2. Disconnect the connector P/J140 on the ROS ASSY.
3. Make certain that there is continuity between P/J14-
1 ↔ P/J140-8 when the INTERLOCK S/W 5V and
SWITCH I/L ASSY 5V are pushed simultaneously.
♦Is there continuity between P/J14-1 ↔ P/J140-8
when the INTERLOCK S/W 5V and SWITCH I/L
ASSY 5V are pushed simultaneously, and no
continuity when they are released?
Go to Step 6
Replace the
HARNESS
ASSY ROS
6
Power supply to HVPS/MCU
1. Remove the SHIELD PLATE LVPS. (p.285)
2. Install the Imaging Cartridge.
3. Disconnect P/J41 from the LVPS.
4. Check whether there is continuity between P/J41-4
↔ P/J41-3.
♦Is there continuity between P/J41-4 ↔ P/J41-3?
Replace the
LVPS
Go to Step 6
7
Continuity of the HVPS/MCU
1. Disconnect P/J14 and P/J11 from the HVPS/MCU
2. Check continuity between P/J14-1 ↔ P/J11-13.
♦Is there continuity between P/J14-1 ↔ P/J11-13?
Go to Step 8
Replace the
HVPS/MCU
8
Continuity of the HARNESS ASSY LVPS
1. Disconnect P/J11 from the HVPS/MCU.
2. Check continuity between P/J11-13 ↔ P/J41-4.
♦Is there continuity between P/J11-13 ↔ P/J41-4?
Go to Step 9
Replace the
HARNESS
ASSY LVPS
Table 3-62. Troubleshooting for ROS ASSY (continued)
Step Action and Question Yes No