CHAPTER 8 TROUBLESHOOTING
8-40
Error Code
Concerned Part
Heater Fan (HTFAN)
F4
Confirm the connection of a heater fan connector.
Is DCN14 of IOD1 properly connected with a connector of the heater fan ?
Is DCN1 of IOD1 properly connected with 11CN of MCTL PWB ?
Check the voltage (HTFANON-P).
Is the voltage between DCN14-10 and 11 to be a rising edge ?
Is the voltage between DCN1-35 and 44 to be a rising edge ?
Is F4 error cleared ?
Job is complete.
Is F4 error cleared ?
Connect them properly.
Replace the MCTL PWB.
Job is complete.
MCTL
11CN
44
35
PGND
HTFANON-P
IOD1
DCN1 DCN14
HTFAN
YES
NO
NO
NO
YES
NO
44
35
HTFANON-P
PGND
HTFANERR
NO
Replace the heater fan.
Replace the IOD1 PWB.
+24V-1
PGND
DCN1
17
25
YES
YES
NO
10
11
12
Heater Fan
12
5
Summary of Contents for HL-3450CN Series
Page 15: ...HL 3450CN SERVICE MANUAL xiii 3 Rating Label For US For Europe 4 Operation Label 5 Jam Label ...
Page 17: ...HL 3450CN SERVICE MANUAL CHAPTER 1 PRODUCT OUTLINE ...
Page 27: ...HL 3450CN SERVICE MANUAL CHAPTER 2 SPECIFICATIONS ...
Page 39: ...CHAPTER 3 INSTALLATION ...
Page 54: ...HL 3450CN SERVICE MANUAL CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS ...
Page 104: ...HL 3450CN SERVICE MANUAL 4 51 Main PCB Circuit Diagram 1 8 CODE B512137CIR 1 8 LJ8907001 NAME ...
Page 106: ...HL 3450CN SERVICE MANUAL 4 53 Main PCB Circuit Diagram 3 8 CODE B512137CIR 3 8 LJ8907001 NAME ...
Page 108: ...HL 3450CN SERVICE MANUAL 4 55 Main PCB Circuit Diagram 5 8 CODE B512137CIR 5 8 LJ8907001 NAME ...
Page 110: ...HL 3450CN SERVICE MANUAL 4 57 Main PCB Circuit Diagram 7 8 CODE B512137CIR 7 8 LJ8907001 NAME ...
Page 126: ...HL 3450CN SERVICE MANUAL CHAPTER 5 CONTROL PANEL OPERATION ...
Page 173: ...HL 3450CN SERVICE MANUAL CHAPTER 6 PERIODIC MAINTENANCE ...
Page 208: ...CHAPTER 7 DISASSEMBLY RE ASSEMBLY ...
Page 264: ...HL 3450CN SERVICE MANUAL CHAPTER 8 TROUBLESHOOTING ...
Page 310: ...HL 3450CN SERVICE MANUAL 8 47 5 IMAGE FAILURE 1 2 3 4 5 6 7 8 9 a 9 b 10 11 12 13 14 ...
Page 311: ...CHAPTER 8 TROUBLESHOOTING 8 48 15 a 15 b 16 17 18 19 20 21 22 23 24 25 26 27 28 244m m 29 ...