CHAPTER IV -22
5.
TROUBLESHOOTING MALFUNCTIONS
When carrying out countermeasures for malfunctions as described in this section, check
connectors for contact failure before measuring the voltage at the specified connector pins.
M-1
No AC power supplied
Possible cause
Step
Check
Result
Remedy
Supply voltage
1
Is the correct voltage present at
the outlet?
No
Inform the user that the correct
voltage is not supplied at the
outlet.
Power plug
2
Is the power cord securely
plugged into the outlet?
No
Plug the power cord securely
into the outlet.
Fuse (F1, F2)
3
is the fuse blown?
Yes
If the fuse blows again
immediately after replacing the
low-voltage power supply PCB,
check that there is not a short
circuit somewhere in the AC
power supply line.
Wiring
4
Unplug the power supply plug.
Is there a broken wire between
the AC input connector of the
low-voltage power supply and
the power plug?
Yes
Replace the AC power cord.
M-2
No DC power supplied
Possible cause
Step
Check
Result
Remedy
AC power supply
1
Is AC power supplied between
connectors CN1-L and CN1-N
when the power plug is plugged
into the outlet?
No
Follow the same check
procedure of M-1 “No AC
power supplied”.
Wiring, DC load
2
Turn the power switch OFF and
disconnect the P13 connector
(Driver PCB).
Turn the power switch ON
again. Measure the voltages
between the terminals.
Do the measured voltage
satisfy the prescribed value in
the table below?
Yes
Turn the power switch OFF,
reconnect the connector and
turn the power switch ON
again.
If the protector circuit is
activated, check the connector,
the wiring from the connector,
and the DC load.
Low-voltage
power supply
PCB
PCB
+ lead pin - lead pin
Voltage
Driver
P13-4.5
P13-2.3
Approx. 24V
P13-8.9
P13-6.7
Approx. 5V
No
Replace the low-voltage power
supply PCB.
Caution: If you analyze malfunctions with the power plug inserted into the power outlet,
special caution should be exercised even if the power switch is OFF because it is
a single pole switch.
Summary of Contents for HL HL-1060
Page 1: ...SERVICE MANUAL MODEL HL 1060 R LASER PRINTER ...
Page 24: ...CHAPTER II 8 1 3 5 DRAM Four 4Mbit DRAM x 8bit are used as the printer memory Fig 2 7 ...
Page 28: ...CHAPTER II 12 1 3 11 Engine I O Fig 2 13 shows the engine interface circuit Fig 2 13 ...
Page 96: ...Appendix 3 Main PCB Circuit Diagram 1 4 CODE UK3400000 B48K246CIR NAME V 3 ...
Page 97: ...Appendix 4 Main PCB Circuit Diagram 2 4 CODE UK3400000 B48K246CIR NAME V 4 ...
Page 98: ...Appendix 5 Main PCB Circuit Diagram 3 4 CODE UK3400000 B48K246CIR NAME V 5 ...
Page 99: ...Appendix 6 Main PCB Circuit Diagram 4 4 CODE UK3400000 B48K246CIR NAME V 6 ...
Page 100: ...Appendix 7 Driver PCB Circuit Diagram CODE UK3634000 B48K280CIR NAME V 7 ...
Page 105: ...Appendix 12 SR PCB Circuit Diagram CODE UK3653000 B48K284CIR NAME V 12 ...