III -
14
5.
HIGH-VOLTAGE POWER SUPPLY ASSY
5.1 Outline
The High-Voltage Power Supply Assy supplies the high-voltage for the charging roller, the
developer cylinder and the transfer roller according to the engine CPU’s control signals.
The block diagrams are shown Fig 3.10 and 3.11.
5.2 Operation of the Components of the High-Voltage Power Supply Assy
(1) Primary charging
When input signal/HV1AC gets the Low level, the primary high-voltage AC is applied to the
primary charging roller. And when input signal/HV1DC gets the Low level, the primary high-
voltage DC is applied to the primary charging roller. The primary high-voltage DC changes with
developer bias DC according to values of the input signal DNSTY which is for print density
adjustment.
(2) Developer bias
When input signal/DBAC gets the Low level, the developer bias AC is applied to the developer
cylinder. And when input signal/DBDC gets the Low level, the developer bias DC is applied to
the developer cylinder. The developer bias DC changes according to values of the input signal
DNSTY which is for print density adjustment, like the primary high-voltage DC.
(3) Transfer charging
Transfer bias is controlled by the input signals HVT1 - 4 and HVTFB. When the input signal/
HVT1 gets the Low level, negative high-voltage is applied to the transfer roller. When the input
signal/HVT2 gets the Low level, positive high-voltage is applied to the transfer roller. When the
input signal/HVT3 gets the Low level, positive high-voltage about 1100 times that of the input
signal HVT4 is applied to the transfer roller. The input signal HVTFB has voltage about 1/1100
times the positive voltage generated on the transfer roller. Once the engine CPU is informed of
this voltage, the bias applied to the transfer roller can be known.
Note: The HVT2 signal generates high-voltage irrespective of the HVT4 signal.
(4) Toner sensing
Voltage levels of the input signals TONER1 and TONER2 allow the engine CPU to check if the
cartridge is set or not and if toner is empty. The TONER1 carries the voltage generated at the
toner sensor and the TONER2 carries the developing bias output value.
Содержание HL-1260
Страница 1: ...SERVICE MANUAL MODEL HL 1260 R LASER PRINTER ...
Страница 40: ...III 8 K D E F A C 2 C 3 C C 1 J B G 2 G 1 G H I Figure 3 6 Main PCB Circuit ...
Страница 108: ...Appendix 2 Paper Feed Size SW PCB Circuitry Diagram 1 1 A 2 CODE NAME UK2516000 B48K139 140CIR JW 27 95 P053 ...
Страница 109: ...Appendix 3 Main PCB Circuitry Diagram 1 8 A 3 CODE NAME UK2495000 B48K158 159CIR 1 8 ...
Страница 110: ...Appendix 4 Main PCB Circuitry Diagram 2 8 A 4 CODE NAME UK2495000 B48K158 159CIR 2 8 ...
Страница 111: ...Appendix 5 Main PCB Circuitry Diagram 3 8 A 5 CODE NAME UK2495000 B48K158 159CIR 3 8 ...
Страница 112: ...Appendix 6 Main PCB Circuitry Diagram 4 8 A 6 CODE NAME UK2495000 B48K158 159CIR 4 8 ...
Страница 113: ...Appendix 7 Main PCB Circuitry Diagram 5 8 A 7 CODE NAME UK2495000 B48K158 159CIR 5 8 ...
Страница 114: ...Appendix 8 Main PCB Circuitry Diagram 6 8 A 8 CODE NAME UK2495000 B48K158 159CIR 6 8 ...
Страница 115: ...Appendix 9 Main PCB Circuitry Diagram 7 8 A 9 CODE NAME UK2495000 B48K158 159CIR 7 8 ...
Страница 116: ...Appendix 10 Main PCB Circuitry Diagram 8 8 A 10 CODE NAME UK2495000 B48K158 159CIR 8 8 ...
Страница 117: ...Appendix 11 Control Panel PCB Circuitry Diagram 1 1 A 11 CODE NAME UK2527000 B48K143CIR ...
Страница 118: ...Appendix 12 Scanner LD PCB Circuitry Diagram 1 1 A 12 CODE NAME UK2674000 B48K165CIR ...
Страница 119: ...SERVICE MANUAL MODEL HL 1260e 1660 R LASER PRINTER ...
Страница 144: ...III 7 Figure 3 6 Main PCB Circuit A C 2 C 3 C J K B I H 1 H 2 C 1 H G G 1 G 2 F E D ...
Страница 168: ...CODE UK3268000 B48K259 235CIR 1 7 NAME Appendix 3 Main PCB Circuitry Diagram 1 7 ...
Страница 169: ...CODE UK3268000 B48K259 235CIR 2 7 NAME Appendix 4 Main PCB Circuitry Diagram 2 7 A 3 ...
Страница 170: ...CODE UK3268000 B48K259 235CIR 3 7 NAME Appendix 5 Main PCB Circuitry Diagram 3 7 A 4 ...
Страница 171: ...CODE UK3268000 B48K259 235CIR 4 7 NAME Appendix 6 Main PCB Circuitry Diagram 4 7 A 5 ...
Страница 172: ...CODE UK3268000 B48K259 235CIR 5 7 NAME A 6 Appendix 7 Main PCB Circuitry Diagram 5 7 ...
Страница 173: ...CODE UK3268000 B48K259 235CIR 6 7 NAME Appendix 8 Main PCB Circuitry Diagram 6 7 A 7 ...
Страница 174: ...CODE UK3268000 B48K259 235CIR 7 7 NAME Appendix 9 Main PCB Circuitry Diagram 7 7 A 8 ...
Страница 175: ...CODE UK3253000 B48K253CIR 1 1 NAME Appendix 11 Scanner LD PCB Circuitry Diagram 1 1 A 9 ...
Страница 188: ...PARTS REFERENCE LIST MODEL HL 1260e R LASER PRINTER ...
Страница 213: ...I Brother Laser Printer HL 1260e HL 1660 USER S GUIDE ...
Страница 421: ...APPENDICES Appendix 15 HP LaserJet 4 Mode Roman 8 8U ISO Latin1 0N ISO Latin2 2N ISO Latin5 5N ...
Страница 422: ...USER S GUIDE Appendix 16 PC 8 10U PC 8 D N 11U PC 850 12U PC 852 17U ...
Страница 423: ...APPENDICES Appendix 17 PC 8 Turkish 9T Windows Latin1 19U Windows Latin2 9E Windows Latin5 5T ...
Страница 424: ...USER S GUIDE Appendix 18 Legal 1U Ventura Math 6M Ventura Intl 13J Ventura US 14J ...
Страница 425: ...APPENDICES Appendix 19 PS Math 5M PS Text 10J Math 8 8M Pi Font 15U ...
Страница 426: ...USER S GUIDE Appendix 20 MS Publishing 6J Windows 3 0 9U Desktop 7J MC Text 12J ...
Страница 429: ...APPENDICES Appendix 23 PC 8 PC 8 D N PC 850 PC 852 ...
Страница 430: ...USER S GUIDE Appendix 24 PC 860 PC 863 PC 865 PC 8 Turkish ...
Страница 431: ...APPENDICES Appendix 25 IBM Mode PC 8 PC 8 D N PC 850 PC 852 ...
Страница 432: ...USER S GUIDE Appendix 26 PC 860 PC 863 PC 865 PC 8 Turkish ...
Страница 433: ...APPENDICES Appendix 27 HP GL Mode ANSI ASCII 9825 CHR SET ...
Страница 434: ...USER S GUIDE Appendix 28 FRENCH GERMAN SCANDINAVIAN SPANISH LATIN JIS ASCII ...
Страница 435: ...APPENDICES Appendix 29 ROMAN8 EXT ISO IRV ISO SWEDISH ISO SWEDISH N ...
Страница 436: ...USER S GUIDE Appendix 30 ISO NORWAY 1 ISO GERMAN ISO FRENCH ISO U K ...
Страница 437: ...APPENDICES Appendix 31 ISO ITALIAN ISO SPANISH ISO PORTUGUESE ISO NORWAY 2 ...