Canon 3260 2 - 10

B. Fixing Control

1. Fixing temperature control

The upper fixing roller contains two heaters: fixing main heater (H1: 600W) and fixing sub heater

(H2: 450W). The fixing main heater heats the center of the upper roller, and the fixing sub heater

mainly heats both ends of the upper roller. The figure below shows the light distribution of the

heaters.

Figure 2-2-7

The surface temperature of the fixing roller is detected by the thermistor (TH1) on the fixing

roller. As the surface temperature rises, the resistance of TH1 decreases, and the voltage of the

FIXING ROLLER TEMPERATURE DETECTION signal (FSRTH) lowers.

The CPU (IC201) on the DC controller controls the FIXING MAIN HEATER DRIVE signal

(/FSRD1), FIXING SUB HEATER DRIVE signal (/FSRD2), FIXING HEATER DRIVE ENABLE sig-

nal (FSRDE), and INVERTER CIRCUIT DRIVE signal (SUPSLT) based on the voltage of the

FSRTH signal in order to bring the surface temperature of the fixing roller to the specified value.

This printer sets the TH-L/H signal to "H" when the fixing roller temperature is low (during

warm-up) and to "L" when the temperature is high (during normal temperature control) in order

to improve the accuracy of the FSRTH signal detection.

Table 2-2-1 shows the fixing roller target temperature during wait, standby, and print peri-

ods.

When it receives a /PRNT signal from the video controller, the CPU starts the fixing heater

print temperature control. The target fixing temperature and print speed at that point is shown

in Table 2-2-1. When you make duplex print or select "ROUGH" in "PAPER TYPE MENU" from

the control panel, the target fixing temperature and print speed are different from that of nor-

mal printing.

2 - 10

CHAPTER 2

Fixing main heater

Fixing upper roller

The center of the upper roller

Thermistor

Surface temperature of the

upper fixing roller

Drive

side

Fixing sub heater

°C

Contents

Main Page PREFACE Page CONTENTS CHAPTER 1 PRODUCT INFORMATION CHAPTER 2 OPERATION AND TIMING CHAPTER 3 THE MECHANICAL SYSTEM CHAPTER 4 TROUBLESHOOTING APPENDIX Page Page Page I. FEATURES 1 - 1 Page II. SPECIFICATIONS 1 - 3 1 - 4 1 - 5 III. SAFETY INFORMATION ! 1 - 6 IV. PARTS OF THE PRINTER 1 - 7 1 - 8 V. INSTALLATION 1 - 9 Figure 1-5-1 1 - 10 1 - 11 Page 1 - 13 1 - 14 1 - 15 1 - 16 Page VI. MAINTENANCE AND SERVICING BY THE CUSTOMER 1 - 18 1 - 19 Page VII. OPERATION 1 - 21 1 - 22 1 - 23 1 - 24 1 - 25 Page CHAPTER 1 1-27 Figure 1-7-2 ** Page CHAPTER 2 OPERATION AND TIMING Page I. BASIC OPERATION 2 - 1 2 - 2 Purpose Remark Period 2 - 3 II. ENGINE CONTROL SYSTEM 2 - 4 3. DC Controller Input/Output Signals Figure 2-2-2 2 - 5 Figure 2-2-3 2 - 6 Figure 2-2-4 MT1 2 - 7 Figure 2-2-5 2 - 8 CL1 SL1 CL2 SMT1 2 - 9 SL2 SL3 2 - 10 2 - 11 2 - 12 2 - 13 2 - 14 Page C. High-Voltage Power Supply Figure 2-2-10 2 - 16 2 - 17 2 - 18 D. Power Supply 1. Outline 2 - 19 Power supply Low-voltage power supply circuit Tofixing roller heater DC controller 2 - 20 2 - 21 2 - 22 M 2 - 23 2 - 24 IC202 (G.A.) IC201 (CUP) Page III. LASER/SCANNER SYSTEM 2 - 26 2 - 27 2 - 28 2 - 29 2 - 30 Page IV. IMAGE FORMATION SYSTEM 2 - 32 Figure 2-4-1 2 - 33 2 - 34 5. Drum cleaning stage Step 8 Drum cleaning Figure 2-4-4 2 - 35 2 - 36 2 - 37 2 - 38 2 - 39 2 - 40 2 - 41 V. PICK-UP/FEED SYSTEM 2 - 42 Figure 2-5-1 2 - 43 Figure 2-5-2 2 - 44 SL2 SL3 SMT1 SL1 CL2 CL3 2 - 45 Figure 2-5-4 Figure 2-5-5 2 - 46 STBY INTR PRINT STBY LSTR (Unit:Seconds) Power switchON Pick-up timing from the upper cassette (A4 : tow pages continuously print) 2 - 47 2 - 48 2 - 49 2 - 50 2 - 51 2 - 52 2 - 53 2 - 54 2 - 55 2 - 56 2 - 57 MT1 2 - 58 2 - 59 2 - 60 VI. OVERALL CONTROL SYSTEM 2 - 61 2 - 62 2-63 Video contoroller PCB Block Diagram Note <J1> AIR <J11> ASIC <J6/7> <J8> Page 2 - 65 2 - 66 2 - 67 Page Page Page I. PREFACE 3 - 1 II. EXTERNALS 3 - 2 3 - 3 3 - 4 3 - 5 3 - 6 3 - 7 III. MAIN UNITS 3 - 8 3 - 9 3 - 10 3 - 11 a 3 - 12 3 - 13 3 - 14 IV. MAIN PARTS 3 - 15 3 - 16 3 - 17 3 - 18 3 - 19 3 - 20 3 - 21 3 - 22 3 - 23 V. SWITCHES/SENSORS 3 - 24 3 - 25 3 - 26 3 - 27 3 - 28 3 - 29 Page Page 3 - 32 3 - 33 3 - 34 VII. MOTORS/FANS 3 - 35 3 - 36 3 - 37 3 - 38 3 - 39 3 - 40 VIII. PCBS 3 - 41 3 - 42 3 - 43 3 - 44 3 - 45 3 - 46 3 - 47 3 - 48 CHAPTER 4 TROUBLESHOOTING Page I. PREFACE 4 - 1 Figure 4-1-1 4 - 2 4 - 3 4 - 4 4 - 5 4 - 6 Figure 4-1-3 4 - 7 Canon Inc., LBP-3260 Printer Configuration Page II. IMAGE DEFECTS 4 - 8 4 - 9 4 - 10 4 - 11 4 - 12 Table 4-2-2 4 - 13 Page 4 - 15 4 - 16 4 - 17 IV. PAPER TRANSPORT TROUBLESHOOTING 4 - 18 Page V. MALFUNCTION TROUBLESHOOTING 4 - 20 VI. MALFUNCTION STATUS TROUBLESHOOTING 4 - 21 4 - 22 4 - 23 4 - 24 4 - 25 4 - 26 4 - 27 VII. MEASUREMENT AND ADJUSTMENT 4 - 28 4 - 29 4 - 30 4 - 31 4 - 32 4. High-voltage power supply PCB Figure 4-7-6 Table 4-7-4 4 - 33 Page VIII. MAINTENANCE AND SERVICING 4 - 35 4 - 36 4 - 37 4 - 38 4 - 39 Tool No. Application/r emarks 1 Printer driver tester RY9-0104 No. Tool name RY9-0104 Usedfor checking printer operations. Shape RANK B 4 - 40 4 - 41 4 - 42 Clip 4 - 43 DATA DATASET Connector 1 RY9-0104 DC24V 4 - 44 PRINTER DRIVER 4 - 45 RY9-0104 PRINTER DRIVER Table 4-8-7 Table 4-8-8 4 - 46 Mode select 8 H. Solvents and Oil List Table 4-8-9 4 - 47 IX. LOCATION OF CONNECTORS 4 - 48 4 - 49 Page Page Page A-1 Timing chart for two consecutive prints on A4 paper (Lower cassette feed - face-down tray delivery) I. GENERAL TIMING CHART (Unit: Seconds) Page 654321 D C Ferritecore ToHVT Fixingsub heater 654321 D C (option) Expansion interface board J1 III. LIST OF SIGNALS A. Input/output signals to/from DC controller PCB A - 5 A - 6 A - 7 A - 8 A - 9 Page IV. MESSAGES TABLE A - 11 A - 12 Note: A - 13 A - 14 A - 15 Note: A - 16 A - 17 A - 18 Note: A - 19 A - 20