Epson EPL-N2050 Service Manual page 99

EPSON EPL-N2050
Table 3-41. Fan Assy Failure
Step Actions & Questions
INITIAL ANALYSIS
Inspect the following components:
• Fan Assy
• Harness Assy LVPS (J28-J281)
1
• PWBA HKB MCU
• PWBA LVPS
Are they compatible with your printer
version, correctly installed, not damaged,
deformed, or contaminated?
FAN ASSY POWER
Check the voltage between P/J283-1 and P/
2 J283-3 when the Main Power is On.
Is there +24VDC between P/J283-1 and P/
J283-3?
FAN ACTUATING SIGNAL
Disconnect P/J26 from the PWBA HKB
MCU.
Use FAN TEST to check the Fan operation.
3
Check the voltage between P26-13 and
P26-8.
Is there +3.3VDC between P26-13 and P26-
8?
Troubleshooting
Yes No
Replace the
Go to Step 2. problem
components.
Go to
Table 3-27,
Go to Step 3. "LVPS Failure
(+24VDC)," on
page 90.
Replace the
Replace the Fan
PWBA HKB
Assy.
MCU.
Secondary FIPs
Table 3-42. Toner Sensor Failure
Step Actions & Questions
INITIAL ANALYSIS
Inspect the following components:
• Toner Sensor
• Holder Toner Sensor
• Cushion TSN
1
• PWBA HKB MCU
• PWBA LVPS
• Harness Assy Toner Sensor (J42-J421)
Are they compatible with your printer
version, correctly installed, not damaged,
deformed, or contaminated?
TONER SENSOR
Disconnect P/J42 from the PWBA Conn.
2
Check the voltage between P42-3 <=> P42-1.
Is there ?24VDC between P42-3 <=> P42-1?
TONER SENSOR ACTUATING SIGNAL
Disconnect P/J42 from the PWBA Conn.
Check the voltage between P42-4 <=> frame
3
ground.
Is there +3.3VDC between P42-4 <=> frame
ground?
HARNESS ASSY TONER SENSOR (J42-J421)
4
Is there continuity (0 ) between all wires on
J42 and J421?
PWBA CONN
Check the continuity between P42-4 and
5 P231-9, P42-3 and P231-11, and P42-1 and
P231-12.
Is there continuity (0 )?
Revision B
Yes No
Replace the
Go to Step 2. problem
components.
Go to
Table 3-27,
Go to Step 3. "LVPS Failure
(+24VDC)," on
page 90.
Go to Step 6. Go to Step 4.
Replace the
Go to Step 5. Harness Assy
Toner Sensor.
Go to
Table 3-27,
Replace the
"LVPS Failure
PWBA Conn.
(+24VDC)," on
page 90.
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