Brother HL-7050 Series, Руководство по обслуживанию

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CHAPTER 3 THEORY OF OPERATION
3-6
1.3 Engine PCB
The engine PCB controls the following parts by using signal data that the CPU (8 bit M38869)
obtains through correspondence with the main PCB. The engine PCB also corresponds with
the optional parts to give operational commands to the CPU.
•
Main motor
•
Cover open sensor
• Fan motor
• Pre-registration sensor
• Thermistor
• Registration sensor
•
Polygon motor
•
Multi purpose tray paper empty sensor
• Paper feed motor • Tray paper empty sensor
• Paper feed solenoid • Face up open sensor
• Multi paper tray solenoid • Full stack sensor
• Registration clutch • Fuser exit sensor
•
High-voltage power supply
•
Eject sensor
• Release motor • Paper size sensor
• Release home position
sensor • Tray ID sensor
• Developer clutch
• Feeder clutch
For the entire circuit diagram of the engine PCB, see APPENDIX 11 to 13 ‘ENGINE PCB
CIRCUIT DIAGRAM, HL-7050’ .
1.4 Power Supply
1.4.1 Low-voltage power supply
The power supply uses a switching regulation system to generate the regulated DC power
(+3.3V, +5V and +24V), which are converted from the AC line.
The regulated output and the production code of each power supply are listed below;
Regulated Output Production Code
+3.3V / 3.0A
+5V / 1.5A
+24V / 7.8A 100V: MPS3516
200V: MPS3416
For the circuit diagram of the low-voltage power supply PCB, see APPENDIX 14, 15 ‘LOW-
VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM, HL-7050’ .