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CANON LBP800
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of CANON LBP800 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
 LVD-K9200 KENWOOD Service Manual by scott mabire;
some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
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Well.. I'd searched for this manual and although I found many copies online I was pleased to find your website with a well balanced pricing system and easy to search and follow links. That together with the very quick response time was just what I was looking for.. being a very impatient tech.. ;-) I had the service manual in front of me within a short time. Bookmarked.. and you can bet I will always come here first for my service & user manuals.. best regards Ed(Tony) Foley G7WHK
 BETA 40 NIKKO Service Manual by Richard Leonardo;
I will definitely be back for more information when I need it.
 EL3534 PHILIPS Service Manual by David Elliott;
The service manual when downloaded and printed out was clear and easy to read. I would have liked to have been able to enlarge some details, but this was not possible as the file permissions did not allow this. The service was very good. The time taken from placing my order to downloading the document was only a few minutes.

Text excerpt from page 83 (click to view)
CHAPTER 2

2. Fixing heater safety circuit This circuit is located on the engine controller PCB and always monitors the abnormal rise of the fixing temperature. When the output voltage from the thermistor falls below about 0.6V (240°C) due to the elevation of the fixing heater temperature, the output of the comparator (IC302) becomes “L” and the relay (RL101) goes OFF to cut off the power to the fixing heater. 3. Protection function The printer has the following three protective functions to prevent excursion of the fixing heater. x The CPU monitors the voltage of TH701. When an abnormality is detected, the CPU assesses a fixing heater failure and then sets the FIXING HEATER DRIVE signal (FSRD) to “L” and the /RLYD signal to “H” to turn OFF the relay (RL101). At the same time, it notifies the interface controller of the failure. x When the fixing heater temperature rises abnormally and the temperature of the thermal fuse exceeds 240°C, the thermal fuse melts and the power to the fixing heater is cut off. x When the fixing temperature rises abnormally and the voltage of TH701 falls below about 0.6V (240°C equivalent), the fixing heater safety circuit cuts off the power to the fixing heater regardless of the output from the CPU. 4. Detecting fixing heater error The CPU assesses a fixing heater failure and notifies the interface controller of the failure under the following conditions. a. The temperature of 20°C or above is not detected within 500 msec after the start of initial temperature control. b. The temperature remains above 220°C for more than the specified period of time during fixing heater temperature control. c. The temperature of 100°C or above is not detected when the power is supplied for the specified period of time during printing or warming up. d. The fixing heater temperature control is performed for 500 msec when the power is turned ON. During this period, the temperature is monitored every 135 msec. The monitored temperature is below 20°C twice in a row. e. The fixing heater temperature falls below 100°C for the specified period of time during the normal temperature control. Note: The fixing film may be damaged if it is rotated at a temperature of 100°C or below due to the high oil viscosity. Therefore, the temperature of the fixing heater is required to be above 100°C to melt the oil.

When a fixing unit failure is assessed, the CPU performs the following operations: 1) Cuts off the power to the fixing heater. 2) Turns off the relay. 3) Immediately stops driving the main motor, scanner motor, and high-voltage system and sets the printer to the error mode regardless of the presence or absence of paper being printed.

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