DC controller
Fixing heater
safety circuit
Fixing unit
Fixing roller
Fixing film
Pressure film
Fixing power supply
AC input
FU1
TH802
TH803
MAINTH
SUB1TH
SUB2TH
H120/H240
TH801
FSRRLD2
ZEROX
FSRD
+24VD
FSRRLD1
RL1102
RL1101
Zerocross
circuit
Relay control
circuit
Fixing heater
control circuit
Description
The DC Controller monitors the fixing temperature detection signal and outputs a fixing control signal according to the detected
temperature. The fixing control circuit controls the Fixing Heater on the basis of this signal, and controls the temperature of the
Fixing Heater to the target value.
Protection Function
Overview
This machine has a function to detect abnormal temperature rising in the Fixing Assembly and cut off the power supply to the
Fixing Heater.
Description
This machine has the following three protection functions to prevent abnormal temperature rising in the Fixing Heater.
• DC Controller
• Fixing Heater safety circuit
• Temperature Fuse
The following describes the details.
DC Controller
The DC Controller monitors the thermistor temperature of the Fixing Heater (Center). When it exceeds the specified
temperature, it is judged that the temperature of the Fixing Assembly is abnormally high, and the fixing control signal (FSRD)
output is stopped, the relay is turned OFF, and the power supply to the heater is turned OFF.
Fixing Heater safety circuit
The Fixing Heater safety circuit monitors the thermistor temperature of the Fixing Heater (Center). When it exceeds the
specified temperature, it is judged that the temperature of the Fixing Assembly is abnormally high, and the relay is turned
OFF and the power supply to the heater is turned OFF.
Temperature Fuse
If the temperature of the Fixing Heater rises abnormally and the temperature of the Fixing Fuse exceeds the specified
temperature, the Temperature Fuse opens and the power supply to the heater turns OFF.
Fixing Assembly Failure Detection
Overview
When the machine is under the following conditions, the DC Controller shuts down the power supply to the Fixing Assembly and
notifies an error.
2. Technical Explanation (Device)
46
Содержание MF735C Series
Страница 1: ...Revision 2 0 MF735C Series Service Manual ...
Страница 13: ...Product Overview 1 Product Lineup 5 Specifications 7 Parts Name 10 ...
Страница 23: ...No Name 6 Home key 7 Stop key 8 NFC Near Field Communication mark 1 Product Overview 14 ...
Страница 81: ...Periodical Service 4 Periodically Replaced Parts 73 Consumable Parts 74 Periodical Services 75 ...
Страница 82: ...Periodically Replaced Parts This machine does not have any periodically replaced parts 4 Periodical Service 73 ...
Страница 83: ...Consumable Parts This machine does not have any consumable parts 4 Periodical Service 74 ...
Страница 84: ...Periodical Services This machine does not require any periodical service 4 Periodical Service 75 ...
Страница 86: ...List of Parts Major Units ADF Reader 1 2 No Name 1 ADF Unit 2 Reader Unit 5 Parts Replacement and Cleaning 77 ...
Страница 118: ... Procedure 1 Remove the ADF Sensor Unit 2x 5 Parts Replacement and Cleaning 109 ...
Страница 119: ...2 Remove the ADF Sensor Unit CAUTION Be careful not to lose the springs 5 Parts Replacement and Cleaning 110 ...
Страница 144: ... Procedure 1 Remove the Memory Relay PCB 2x 1x 5 Parts Replacement and Cleaning 135 ...
Страница 149: ...10 Loosen the screws and remove the Laser Scanner Unit Fixation Pins 2x 5 Parts Replacement and Cleaning 140 ...
Страница 159: ...3 Remove the PCB Holder 3x 4 Remove the Drum Motor 4x 1x 5 Parts Replacement and Cleaning 150 ...
Страница 180: ...7 Remove the Registration Unit 2x 5 Parts Replacement and Cleaning 171 ...
Страница 181: ...Adjustment 6 Adjustment at Parts Replacement 173 ...
Страница 211: ...Troubleshooting 7 Test Print 203 Troubleshooting Items 216 Debug Log 219 ...
Страница 230: ...Error Jam Alarm 8 Overview 222 Error Code 225 Jam Code 232 Alarm Code 235 ...
Страница 346: ...Installation 10 Copy Control Interface Kit C1 338 MiCARD Attachment Kit B1 345 Copy Card Reader F1 351 ...
Страница 353: ...17 2x 18 1x 19 20 21 Connect the power plug to the outlet 22 Turn ON the main power switch 10 Installation 344 ...
Страница 356: ...6 7 8 9 2x 10 1x 10 Installation 347 ...
Страница 357: ...11 12 Installing the Card Reader 1 1x M4x16 2 10 Installation 348 ...
Страница 358: ...3 4 NOTE Be sure that it does not protrude from the depression 5 6 7 1x 10 Installation 349 ...
Страница 359: ...8 3x 9 1x 1x 10 Connect the power plug to the outlet 11 Turn ON the main power switch 10 Installation 350 ...
Страница 362: ...4 2x 5 NOTE Release the claw while opening the Right Cover Unit in the direction of the arrow 6 7 10 Installation 353 ...
Страница 372: ...APPENDICES Service Tools 364 General Circuit Diagram 365 Backup Data List 368 Soft counter specifications 370 ...