Service Manual
Page 3
...circuits and their timing information. All relevant information in such cases will be supplied in this machine" or "the printer"). This service manual covers the HL-1240/1250 printers. CHAPTER 3: THEORY OF OPERATION Basic operation of the following chapters: CHAPTER 1: GENERAL Features, specifications, etc. ...basic operation of rollers, Connection diagrams, PCB circuit diagrams, etc. PREFACE PREFACE This service manual contains basic information required for after-sales service of the laser printer (hereinafter referred to improvement or redesign of the product.
...circuits and their timing information. All relevant information in such cases will be supplied in this machine" or "the printer"). This service manual covers the HL-1240/1250 printers. CHAPTER 3: THEORY OF OPERATION Basic operation of the following chapters: CHAPTER 1: GENERAL Features, specifications, etc. ...basic operation of rollers, Connection diagrams, PCB circuit diagrams, etc. PREFACE PREFACE This service manual contains basic information required for after-sales service of the laser printer (hereinafter referred to improvement or redesign of the product.
Service Manual
Page 9
...printer is certified as a Class I laser product under the US Department of Health and Human Services (DHHS) Radiation Performance Standard according to laser products marketed in the United States. the laser beam cannot escape form the machine during any phase of procedures other than those specified in this manual... printer indicates compliance with the FDA regulations and must be attached to the Radiation Control for laser products manufactured on the back of the following labels on and after August 2, 1976. The label for Japanese manufactured products MANUFACTURED: K BROTHER ...
...printer is certified as a Class I laser product under the US Department of Health and Human Services (DHHS) Radiation Performance Standard according to laser products marketed in the United States. the laser beam cannot escape form the machine during any phase of procedures other than those specified in this manual... printer indicates compliance with the FDA regulations and must be attached to the Radiation Control for laser products manufactured on the back of the following labels on and after August 2, 1976. The label for Japanese manufactured products MANUFACTURED: K BROTHER ...
Service Manual
Page 12
... plug inserted into the power outlet, special caution should be observed to remember when servicing the printer. **Listed below are the various kinds of "WARNING" messages included in this service manual: WARNING Indicates warnings that must be exercised even if the power switch is OFF ...because it is used in this manual. NOTE: Indicates notes and useful tips to prevent possible personal injury...
... plug inserted into the power outlet, special caution should be observed to remember when servicing the printer. **Listed below are the various kinds of "WARNING" messages included in this service manual: WARNING Indicates warnings that must be exercised even if the power switch is OFF ...because it is used in this manual. NOTE: Indicates notes and useful tips to prevent possible personal injury...
Service Manual
Page 173
PAPER CASSETTE INFORMATION (FOR EUROPE ONLY) The A4 size paper cassette fitted to the printer is different from the service manual information for printers shipped to Europe as follows:- 1) The paper cassette supplied with the HL1240/1250 printer has a plastic rib on the paper tray cover. 2) The plastic rib is removed from the lower .... 4) For paper cassettes supplied as spare parts, the plastic rib has been cut off so that you can use it is installed onto the HL-1250 printer, it as shown on the right; A- 14 3) If the optional LT-400 Lower Tray Unit is necessary to do so will cause paper...
PAPER CASSETTE INFORMATION (FOR EUROPE ONLY) The A4 size paper cassette fitted to the printer is different from the service manual information for printers shipped to Europe as follows:- 1) The paper cassette supplied with the HL1240/1250 printer has a plastic rib on the paper tray cover. 2) The plastic rib is removed from the lower .... 4) For paper cassettes supplied as spare parts, the plastic rib has been cut off so that you can use it is installed onto the HL-1250 printer, it as shown on the right; A- 14 3) If the optional LT-400 Lower Tray Unit is necessary to do so will cause paper...
Service Manual
Page 189
... AC power supplied 6-18 no DC power supplied 6-18 no paper supplied 6-19 NVRAM error 6-22 ROM error 6-22 scanner failure 6-21 Service A 6-22 Service B 6-22 manual duplex 2-11 manual feed paper guide 1-3 manual feed slot 1-3, 2-10 memory 1-5 MEMORY FULL 6-6, 6-8 MISFEED 6-6 modular jack for lower tray unit 1-3 MTBF 5-7 MTTR 5-7 N no AC power supplied 6-18 no...
... AC power supplied 6-18 no DC power supplied 6-18 no paper supplied 6-19 NVRAM error 6-22 ROM error 6-22 scanner failure 6-21 Service A 6-22 Service B 6-22 manual duplex 2-11 manual feed paper guide 1-3 manual feed slot 1-3, 2-10 memory 1-5 MEMORY FULL 6-6, 6-8 MISFEED 6-6 modular jack for lower tray unit 1-3 MTBF 5-7 MTTR 5-7 N no AC power supplied 6-18 no...