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Brother HL-1850 Service Manual

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  • Page 3 HL-1850/1870N SERVICE MANUAL...
  • Page 4 TABLE OF CONTENTS...
  • Page 5 HL-1850/1870N SERVICE MANUAL...
  • Page 6 TABLE OF CONTENTS...
  • Page 7 HL-1850/1870N SERVICE MANUAL...
  • Page 8 TABLE OF CONTENTS...
  • Page 9 HL-1850/1870N SERVICE MANUAL...
  • Page 10 REGULATION...
  • Page 11 HL-1850/1870N SERVICE MANUAL...

  • Page 12: Safety Information

    SAFETY INFORMATION...
  • Page 13 HL-1850/1870N SERVICE MANUAL CAUTION INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCK DEFEATED. AVOID DIRECT EXPOSURE TO BEAM. CLASS 3B LASER PRODUCT. ADVARSEL USYNLIG LASER STRÅLING NÅR KABINETLÅGET STÅR ÅBENT. UNGDÅ DIREKTE UDSÆTTELSE FOR STRÅLING. KLASSE 3B LASER. VARNING OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR ÄR URKOPPLADE.

  • Page 14: Definitions Of Warnings, Cautions And Notes

    SAFETY INFORMATION DEFINITIONS OF WARNINGS, CAUTIONS AND NOTES The following conventions are used in this service manual: WARNING Indicates warnings that must be observed to prevent possible personal injury. CAUTION: Indicates cautions that must be observed to service the printer properly or prevent damage to the printer.
  • Page 15 HL-1850/1870N SERVICE MANUAL xiii...
  • Page 24 CAUTION:...
  • Page 26 Portrait...
  • Page 28 Landscape...
  • Page 34 READY Data Back Reprint Job cancel...
  • Page 47 ® ® ®...
  • Page 50 Data Back Reprint Job cancel...
  • Page 51 DATA!!! JOB CANCELLIG READY...
  • Page 52 READY NO DATA STORED COPIES= 1 COPIES=999...
  • Page 53 COPIES= COPIES= REPRINTING PRESS SET TO PRINT...
  • Page 54 NO DATA STORED LAST JOB SECURE USER XXXXXXX JOB XXXXXXX PASSWORD XXXX COPIES= PRESS SET TO PRINT PRINTING NO DATA STORED DELETE STORAGE...
  • Page 57 READY PROCESSING SLEEP PRINTING SELF TEST PAUSE NOW INITIALIZING WARMING UP MEMORY SIZE=XX MB JOB CANCELING RESOLUTION ADAPT PRESS SET TO PRINT RESET TO FACTORY SETTING...
  • Page 58 READY INFORMATION PAPER SOURCE MP FIRST =OFF ”.
  • Page 59 INFORMATION PAPER QUALITY SETUP PRINT MENU NETWORK INTERFACE RESET MENU...

  • Page 60: Maintenance

    PRINT SETTINGS PRINT TEST PRINT DEMO PRINT FILE LIST PRINT FONTS VERSION SER.NO=######### ROM VER=#### ROM DATE ##/##/## NET VER=#### NET DATE ##/##/## RAM SIZE=###MB MAINTENANCE PAGE COUNTER =###### REMAIN DRUM =###### REMAIN PF KIT1 =###### REMAIN PF KIT2 =###### REMAIN FUSER =###### REMAIN LASER...

  • Page 61: Lock Panel

    RESOLUTION TONER SAVE DENSITY LANGUAGE LCD DENSITY POWER SAVE TIME AUTO CONTINUE LOCK PANEL REPRINT PAGE PROTECTION EMULATION KEEP PCL RAMDISK SIZE DELETE STORAGE SECURE FILE DATA ID MACRO ID FONT ID FORMAT...
  • Page 62 MEDIA TYPE PAPER COPIES ORIENTATION PRINT POSITION X OFFSET=0 Y OFFSET=0 AUTO FF=OFF FF SURPRESS HP LASERJET FONT NO. FONT PITCH/POINT SYMBOL/ CHARACTER SET TABLE PRINT AUTO LF=OFF AUTO CR=OFF AUTO WRAP=OFF...
  • Page 63 AUTO SKIP=ON HP LASERJET LEFT MARGIN RIGHT MARGIN TOP MARGIN BOTTOM MARGIN LINES EPSON FX-850 FONT NO. FONT PITCH/ POINT SYMBOL/ CHARACTER SET TABLE PRINT AUTO LF=OFF AUTO MASK LEFT MARGIN RIGHT MARAGIN TOP MARGIN...

  • Page 64: Bottom Margin

    BOTTOM MARGIN LINES...
  • Page 65 IBM PROPRINTER FONT NO. FONT PITCH/ POINT SYMBOL/ CHARACTER SET TABLE PRINT AUTO LF=OFF AUTO CR=OFF LEFT MARGIN RIGHT MARAGIN TOP MARGIN BOTTOM MARGIN LINES BR-SCRIPT ERROR PRINT...
  • Page 66 TCP/IP TCP/IP ENABLE IP ADDRESS= SUBNET MASK= GATEWAY= IP BOOT TRIES IP METHOD NETWARE NETWARE ENABLE NET FRAME APPLETALK NETBEUI DLC/LLC BANYAN NETBIOS/IP ENET AUTO IF TIME INPUT BUFFER PARALLEL HIGH SPEED BI-DIR=ON/OFF...
  • Page 67 RESET PRINTER FACTORY RESET INFORMATION NETWORK TCP/IP TCP/IP ENABLE IP ADDRESS= 192.0.0.192 123.0.0.192 123.45.67.89 123.45.67.89...

  • Page 70: Print Menu

    PAPER SOURCE TRAY PRIORITY MP FIRST MP SIZE MANUAL FEED TRAY1 SIZE TRAY2 SIZE DUPLEX QUALITY RESOLUTION TONER SAVE DENSITY SETUP LANGUAGE LCD DENSITY POWER SAVE TIME AUTO CONTINUE LOCK PANEL REPRINT EMULATION KEEP PCL PRINT MENU MEDIA TYPE PAPER COPIES ORIENTATION PRINT POSITION...

  • Page 71: Ibm Proprinter

    PRINT MENU HP LASER JET EPSON FX-850 IBM PROPRINTER BR-SCRIPT...
  • Page 72 NETWORK TCP/IP NETWARE APPLETALK NETBEUI DLC/LLC BANYAN NETBIOS/IP ENET...
  • Page 74 ...
  • Page 75 ...
  • Page 78 HL-1850/1870N SERVICE MANUAL Network board (Standard for HL-1670N Option for HL-1650) Optional RAM (DIMM) Ethernet (max. 128Mbytes) 10/100 Base TX Control system Expansion RAM 8MB PCI bus memory I/O Interface block (Parallel / USB) Video control block Engine control block Operation block (Control panel) Paper tray unit...
  • Page 79 CHAPTER 3 THEORY OF OPERATION A S I C CPU Core (MB86834) Oscillator (48MHz) Reset Circuit Address Decoder DRAM Control Program + Font ROM 10 Mbytes Timer Network Program (2.0 Mbytes) FIFO CDCC Parallel I/O To PC (HL-1650: 8.0 Mbytes) (HL-1670N: 16 Mbytes) To PC USB I/O...
  • Page 80 HL-1850/1870N SERVICE MANUAL...
  • Page 81 CHAPTER 3 THEORY OF OPERATION...
  • Page 82 HL-1850/1870N SERVICE MANUAL...
  • Page 83 CHAPTER 3 THEORY OF OPERATION...
  • Page 84 HL-1850/1870N SERVICE MANUAL...
  • Page 85 CHAPTER 3 THEORY OF OPERATION...
  • Page 86 HL-1850/1870N SERVICE MANUAL...
  • Page 87 CHAPTER 3 THEORY OF OPERATION...
  • Page 88 HL-1850/1870N SERVICE MANUAL...
  • Page 89 CHAPTER 3 THEORY OF OPERATION...
  • Page 90 HL-1850/1870N SERVICE MANUAL...
  • Page 91 CHAPTER 3 THEORY OF OPERATION...
  • Page 92 HL-1850/1870N SERVICE MANUAL...
  • Page 93 CHAPTER 3 THEORY OF OPERATION (Heater) Thermal Fuse Fuse Heater Circuit Lamp Fuse Lightning Surge Absorber Feedback Line Oscillator Rectifier Filter (Engin Circuit / Main Circuit) Regulation Circuit 3.3V 3.3V Regulation Circuit...
  • Page 94 HL-1850/1870N SERVICE MANUAL Current 24VI Regulator Transfer Roller Voltage Cleaning Brush Regulator Supply Roller Photosensitive Drum VR21 Development Roller Current Regulator Corona Unit Voltage Regulator VR81 Voltage Regulator VR51 Voltage Regulator VR31...
  • Page 96 HL-1850/1870N SERVICE MANUAL Panel PCB Laser Unit H Network Laser Board (HL-1670N) Polygon Motor Drum Unit Primary Charger (Corona Wire) Primary Charger (Grid) Main PCB Engine PCB High- Development Roller Voltage Front Power Supply Roller Registration Supply Sensor Low-Voltage Transfer Roller Power Supply Rear Paper Dust Cleaner...

  • Page 97: Paper Registration

    CHAPTER 3 THEORY OF OPERATION Paper Transfer 2.2.1 Paper supply Fig. 3-20 2.2.2 Paper registration Fig. 3-21...
  • Page 98 HL-1850/1870N SERVICE MANUAL...

  • Page 99: Paper Eject

    CHAPTER 3 THEORY OF OPERATION 2.2.3 Paper eject Fig. 3-22 2.2.4 Duplex printing Fig. 3-23...

  • Page 100: Cover Sensors

    HL-1850/1870N SERVICE MANUAL Sensors 2.3.1 Cover sensors Fig. 3-24 2.3.2 Toner sensors Fig. 3-25...
  • Page 101 CHAPTER 3 THEORY OF OPERATION...

  • Page 102: Rear Cover Sensor

    HL-1850/1870N SERVICE MANUAL 2.3.3 DX tray sensor / DX paper size sensor Fig. 3-26 2.3.4 Rear cover sensor Fig. 3-27...

  • Page 103: Cassette Sensor / Paper Empty Sensor

    CHAPTER 3 THEORY OF OPERATION 2.3.5 Cassette sensor / Paper empty sensor Fig. 3-28 2.3.6 Paper eject sensor Fig. 3-29...

  • Page 104: Primary Charger

    HL-1850/1870N SERVICE MANUAL Drum Unit 2.4.1 Photosensitive drum 2.4.2 Primary charger 2.4.3 Transfer roller 2.4.4 Cleaner Toner Cartridge Print Process 2.6.1 Charging Aluminum drum sleeve Photosensitive Drum Organic Photoconductor layer - - - - + + + 870V Grid Voltage Regulator + + + HVPS...

  • Page 105: Exposure Stage

    CHAPTER 3 THEORY OF OPERATION 2.6.2 Exposure stage Fig. 3-31 1 Cycle of drum Primary charging Laser beam exposure and developing (a) Unexposed area +870 ( Non image area ) (b) Exposed area ( Image area ) Transfer the image to paper +400 +150 Drum...
  • Page 106 HL-1850/1870N SERVICE MANUAL 2.6.3 Developing Fig. 3-33 2.6.4 Transfer...

  • Page 107: Fixing Stage

    CHAPTER 3 THEORY OF OPERATION 2.6.5 Fixing stage Fig. 3-34...

  • Page 108: Chapter 4 Disassembly And Re-Assembly

    CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY SAFETY PRECAUTIONS WARNING (1) Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. (2) Some parts inside the printer are extremely hot immediately after the printer is used.

  • Page 110: Disassembly Flow

    HL-1850/1870N SERVICE MANUAL DISASSEMBLY FLOW AC CORD BASE PLATE LASER UNIT DRUM UNIT ENGINE PCB ASSY PAPER CASSETTE FIXING UNIT / HIGH-VOLTAGE PS PCB ASSY NETWORK BOARD PAPER PICK-UP ROLLER ASSY TOP COVER EXIT ROLLER UNIT DX SENSOR FEED MP UNIT PCB ASSY DX FEED ASSY PAPER FEED...
  • Page 116 CAUTION:...
  • Page 130 CAUTION:...
  • Page 136 CAUTION:...
  • Page 140 CAUTION: CAUTION:...
  • Page 155 CAUTION:...
  • Page 157 CAUTION:...
  • Page 164 CAUTION:...
  • Page 176 WARNING (1) Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. (2) Some parts inside the printer are extremely hot immediately after the printer is used. When opening the front cover or rear cover to access any parts inside the printer, never touch the red colored parts shown in the following figures.
  • Page 177 CAUTION: CAUTION:...
  • Page 178 CAUTION:...
  • Page 179  CAUTION:...
  • Page 181 CAUTION: WARNING There are high voltage electrodes inside the printer. Before cleaning the printer, make sure that the power switch has been turned off and the power cord has been unplugged from the power outlet. CAUTION: CAUTION:...
  • Page 182  CAUTION: CAUTION:...
  • Page 184 CAUTION:...

  • Page 187: Initial Check

    HL-1850/1870N SERVICE MANUAL CHAPTER 6 TROUBLESHOOTING INTRODUCTION Initial Check...

  • Page 188: Warnings For Maintenance Work

    CHAPTER 6 TROUBLESHOOTING Warnings for Maintenance Work WARNING (1) Always turn off the power switch and unplug the power cord from the power outlet before accessing any parts inside the printer. (2) Some parts inside the printer are extremely hot immediately after the printer is used. When opening the front cover or rear cover to access any parts inside the printer, never touch the red colored parts shown in the following figures.
  • Page 190 TONER EMPTY NO PAPER XXXX COVER OPEN FUSER OPEN FACE UP OPEN JAM XXXXXX MANUAL FEED BUFFER ERROR STORAGE FULL DOWNLOAD FULL FONT FULL MEMORY FULL SIZE MISMATCH...
  • Page 191 PRINT OVERRUN IGNORE DATA SIZE ERROR DX SIZE ERROR T1 SIZE ERROR T2 NO DX TRAY DX LEVER ERROR NO TRAY1 CLEAN DRUM UNIT CHANGE DRUM SOON TONER LOW REPLACE PF KIT1 REPLACE PF KIT2 REPLACE FUSER REPLACE LASER...

  • Page 192: Service Call

    ERROR ### SERVICE CALL Error occurs. Confirm the LCD indication. Turn OFF/ON the power switch. Error occurs again. Temporary error. See section 5. Use the printer with- 'MALFUNCTIONS'. out corrective action.
  • Page 193 ERROR S01 ERROR S02 ERROR S03 ERROR S04 ERROR S05 ERROR S06 ERROR S07 ERROR S08 ERROR S09 ERROR S10 ERROR S11 ERROR S12 ERROR S13 ERROR S21 ERROR E41...
  • Page 195 ERROR E49 ERROR E50 ERROR E51 ERROR E52 ERROR E54 ERROR H60 ERROR H61 ERROR H63 ERROR H66 ERROR H67 ERROR H68 ERROR H73 ERROR H74 ERROR H37 ERROR H38 ERROR H39...
  • Page 197 JAM INSIDE JAM TRAY1 JAM REAR JAM TRAY2 JAM MP TRAY JAM DUPLEX PAPER JAM...
  • Page 200 ...
  • Page 215 + lead pin - lead pin Voltage P5-2 P5-3 Approx. 24V Engine Approx. 5V P3-10 P3-9...
  • Page 221 I-5 Dirt on back of paper I-1 Light I-2 Dark I-2 Dark I-3 Completely blank I-4 All black I-6 Black vertical I-6 Black vertical I-7 Black horizontal I-8 Black vertical I-9 White vertical streaks streaks stripes streaks streaks Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o...
  • Page 231 Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o Print out test print o...
  • Page 245 Print Server Status Control...
  • Page 247 /etc/ethers /etc/hosts /etc/printcap /usr/spool :lp = /dev/null: \ :lp = :\...
  • Page 248 SET SERVICE BRN_xxxxxx_P1 EOT 2 SET SERVICE BRN_xxxxxx_P1 EOT 3 /etc/printcap mx#0 etc/printcap...
  • Page 250 PRINT QUEUE INFORMATION CURRENTLY ATTACHED SERVERS SET NETWARE PASSWORD SET NETWARE SERVER servername ENABLED SET NETWARE FRAME...
  • Page 251 SET APPLETALK ZONE...
  • Page 252 Right Left...
  • Page 253 CTPEDSMRFGL2FRE Right Left...
  • Page 257 Entering the Professional Menu Mode Accessing the Required Menu Inputting a Value or Setting for a Professional Menu Mode Exiting the Professional Menu Mode...
  • Page 258 TRAY SETTING PAPER IN=CONT* (MANUAL FEED) PAPER IN=STOP TRAY COMMAND MODE TRAY COM.=NORM* TRAY COM.=SPEC. READOUT SELECT READOUT=OFF* READOUT=ON FONT SELECT SCALABLE FONT FONT=ALL* FONT=LJ4 FONT SELECT PRIMARY FONT SECONDARY FONT IBM CHR SET MODE IBM E1H=Esszet IBM E1H=Beta W BOLD ON/OFF W BOLD=OFF* W BOLD=ON DLFNT Bd/It...
  • Page 259 ISR FONT SELECT ISRFONT=DISABLE* ISRFONT=ENABLE BRO FONT SELECT BROBITM=DISABLE* BROBITM=ENABLE...
  • Page 260 FONT SELECT 300DPI PRIORITY 3B PRIO=LOW* 3B PRIO=HIGH FX/XL SCALE FONT SCAL.F=NORMAL* SCAL.F=ALL SIZE FX/XL SCALE ITA. ITA=OBLIQUE* ITA=ITALIC SEL exit FONT PAPER&TRAY SIZE DEF PAPER=LT* DEF PAPER=A4 PARALLEL MENU PARALLEL TIMING CDCC PSW=H* CDDC PSW=L STB/ACK DELAY CDCC BSSL=L* CDCC BSSL=H exit PARALLEL REPRINT ON/OFF...
  • Page 261 DRAM CHECK START START DRAM TEST...
  • Page 262 AUTO HRC ON/OFF AUTO HRC=OFF* AUTO HRC=ON DEMO PAGE ON/OFF DEMO PAGE=ON* DEMO PAGE=OFF APPLETALK AT/PS APPLE TALK=PS* APPLE TALK=AUTO PS BINARY SELECT PS BINARY=ASCII* PS BINARY=BIN PS QUOTE BINARY PS QUOTEBIN=OFF* BS QUOTEBIN=ON PS IMAGE MASK PS IMAGEMSK=OFF* BS IMAGEMSK=ON PS CELL MODE PS CEIL=FLOOR* PS CEIL=CEIL...
  • Page 263 PS300RESO PS300RESO=NO* PS300RESO=IF 2M PS300RESO=FORCE COPY PAGES COPY PAGES=ON* COPY PAGES=OFF PANEL RESET MODE RESET=NORMAL* RESET=JOB JOB TIMEOUT SEL TIMEOUT=ON* TIMEOUT=OFF BACKLIGHT TEST BACKLIGHT=OFF BACKLIGHT=GREEN BACKLIGHT=RED BACKLIGHT=ORANGE exit VIEWANGLE TEST VIEWANGLE=0 VIEWANGLE=1 VIEWANGLE=2 exit NV-RAM DEBUG NV-RAM DISPLAY NV-RAM HEX PRINT exit JOB CANCEL TIME TIME OUT=XXsec...
  • Page 264 APPLEUSBPS BINARY=OFF* BINARY=ON DX 1JOB1PAGE SEL 1JOB1PAGE=SX* 1JOB1PAGE=DX PS FONT CACHE CLEAR CACHE=OFF* CLEAR CACHE=ON exit MENU...
  • Page 265 SERVICE INFO PAGE COUNT JAM COUNT TONER CHANGE DRUM CHANGE PF KIT 1 CHANGE PF KIT 2 CHANGE FUSER CHANGE LASER CHANGE COVERAGE A4 PAGE LETTER PAGE LEGAL PAGE EXECUTIVE PAGE B5 PAGE JIS B5 PAGE...
  • Page 266 A5 PAGE A6 PAGE SERVICE INFO B6 PAGE COM10 PAGE C5 PAGE DL PAGE MONARCH PAGE A4LONG PAGE ERROR HISTORY 1:####### 2:####### 3:####### …… 10:####### LIFE PERIOD DRUM LIFE DRUM UNIT PF KIT 1 PF KIT 2 FUSER UNIT LASER UNIT MODIFY COUNT JAM COUNT REPLACE COUNT...
  • Page 267 MODIFY COUNT REMAIN LIFE DRUM UNIT PF KIT 1 PF KIT 2 FUSER UNIT LASER UNIT RESET COUNT CLEAR COVERAGE CLEAR ERROR HIST...
  • Page 268 DEMO MODE=ON* DEMO MODE=OFF LANG.=ENGLISH* …… HEX DUMP MODE DRAM CHECK MODE GO TEST MODE LINE TEST MODE ZLH HV CHECK...

  • Page 272: Appendix 1. Connection Diagram, Hl-1850/1870N

    Appendix 1. Connection Diagram, HL-1850/1870N A - 1...
  • Page 273 Appendix 2. Main PCB Circuit Diagram, HL-1850/1870N (1/6) CODE LJ8453001 NAME B512078CIR (1/6) A - 2...
  • Page 274 Appendix 3. Main PCB Circuit Diagram, HL-1850/1870N (2/6) CODE LJ8453001 NAME B512078CIR (2/6) A - 3...
  • Page 275 Appendix 4. Main PCB Circuit Diagram, HL-1850/1870N (3/6) CODE LJ8453001 NAME B512078CIR (3/6) A - 4...
  • Page 276 Appendix 5. Main PCB Circuit Diagram, HL-1850/1870N (4/6) CODE LJ8453001 NAME B512078CIR (4/6) A - 5...
  • Page 277 Appendix 6. Main PCB Circuit Diagram, HL-1850/1870N (5/6) CODE LJ8453001 NAME B512078CIR (5/6) A - 6...
  • Page 278 Appendix 7. Main PCB Circuit Diagram, HL-1850/1870N (6/6) CODE LJ8453001 NAME B512078CIR (6/6) A - 7...
  • Page 279 Appendix 8. Engine PCB Circuit Diagram, HL-1850/1870N (1/2) Red 5 Pin PH Right Angle Black 6 Pin PH Right Angle Straight White 2 Pin PH Right Angle White 3 Pin PH Right Angle White 5 Pin PH Right Angle White 4 Pin PH Right Angle Red 6 Pin PH Right Angle...
  • Page 280 Appendix 9. Engine PCB Circuit Diagram, HL-1850/1870N (2/2) Straight White 9 Pin PH Red 9 Pin PH Right Angle Straight Black 5 Pin PH CODE LJ8439001 NAME B512079CIR (2/2) A - 9...

  • Page 281: Appendix 10. Network Board Pcb Circuit Diagram, Hl-1850/1870N

    Appendix 10. Network Board PCB Circuit Diagram, HL-1850/1870N CODE LJ8439001 NAME B512058CIR A - 10...

  • Page 282: Appendix 11. Low-Voltage Power Supply Pcb Circuit Diagram (100V)

    Appendix 11. Low-voltage Power Supply PCB Circuit Diagram (100V) Low-voltage PS Circuit NAME (100V) A - 11...

  • Page 283: Appendix 12. Low-Voltage Power Supply Pcb Circuit Diagram (200V)

    Appendix 12. Low-voltage Power Supply PCB Circuit Diagram (200V) Low-voltage PS Circuit NAME (200V) A - 12...

  • Page 284: Appendix 13. High-Voltage Power Supply Pcb Circuit Diagram

    Appendix 13. High-voltage Power Supply PCB Circuit Diagram NAME High-voltage PS Circuit A - 13...
  • Page 290 Drum Life 100% 00000020202020202 99.9% MZ-L2000000006801...
  • Page 293 Exit...
  • Page 301 APPENDIX NOTE; Working hours change according to the capability of PC to be used.
  • Page 302 APPENDIX...
  • Page 303 APPENDIX...

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Hl-1870n

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