Ros Assy - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

3.4.3 ROS ASSY

Table 3-62. Troubleshooting for ROS ASSY
Step Action and Question
Parts below can be the source of this error

• ROS ASSY

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