Panasonic KX-MC6020RU / KX-FAP317A / KX-FAB318A Service Manual ▷ View online
109
KX-MC6020RU
1. 3.3V/2.5V booting waveform example (self booting waveform without sequencer)
2. 1.2V/1.5V booting waveform example
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KX-MC6020RU
6.18.3. Regulator Circuit (5V)
IC4 and IC6 are turned ON when 3.3V power supply is booted, 5V is generated from 7V-input.
6.18.4. Regulator Circuit (1.25V)
IC3 and IC7 generate termination voltage 1.25V for DDR_SDRAM (IC400, 401, 960).
6.18.5. Reset Circuit
Reset IC (IC5) monitors 5VD2.
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KX-MC6020RU
6.19. PSU (Low Voltage Power Supply Board) Section
The low voltage power supply board circuit generates +7V and +24Vdc.
It also supplies AC voltage to the halogen heat lamp in the fuser unit.
The low voltage power supply board uses the switching regulator method.
It also supplies AC voltage to the halogen heat lamp in the fuser unit.
The low voltage power supply board uses the switching regulator method.
[Input Circuit]
The input current goes into the input rectifier circuit through the filter circuit.
The filter circuit decreases the noise voltage and the noise electric field strength.
The filter circuit decreases the noise voltage and the noise electric field strength.
[Rectifier Circuit]
The input circuit is rectified by D001 and charge C016 to make DC voltage.
Then it supplies power to the converter circuit.
Then it supplies power to the converter circuit.
[Kick-on Voltage Circuit]
Bias is applied to the Q001 gate via this circuit when the AC power is turned on and Q001 begins operating.
[Control Circuit and Error Detecting Circuit 1]
The control circuit detects the voltage that increased in an error detect circuit 1 and controls it to become the predetermined out-
put voltage.
This is shown as follows.
When the output voltage of the 7V circuit increases, the current of the photo coupler PC001 increases, the pulse width of the
output control IC becomes narrower and the ON period of Q001 becomes shorter.
put voltage.
This is shown as follows.
When the output voltage of the 7V circuit increases, the current of the photo coupler PC001 increases, the pulse width of the
output control IC becomes narrower and the ON period of Q001 becomes shorter.
[Over Current Limiter (O.C.L)]
The highest drain current of Q001 is limited by a limit current circuit. The 7V and 24V output is limited by this circuit.
[Over Voltage Circuit (O.V.L) and Error Detecting Circuit 2]
The control circuit detects the voltage that the 24V or 7V output increased in an error detect circuit 2 and controls it to becomes
0V.
0V.
Dummy load method (to quickly check the power supply output)
Refer to PSU (Low Voltage Power Supply Board) Section (P.291).
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KX-MC6020RU
6.20. Mechanical Operation
6.20.1. Color Motor Rotation Travel
The Color Motor (DC Motor) is for driving the 3 Color (Cyan, Magenta, Yellow) Drum Cartridges and 3 Color (Cyan, Magenta, Yel-
low) Toner Cartridges.
low) Toner Cartridges.
Number
Block Name
Description
Refer to
(1)
• Cyan Drum Cartridge (OPC) Joint
• Magenta Drum Cartridge (OPC) Joint
• Yellow Drum Cartridge (OPC) Joint
• Magenta Drum Cartridge (OPC) Joint
• Yellow Drum Cartridge (OPC) Joint
The Motor Rotation is transmitted to
the OPC Drum in the each color
drum cartridge through each joint,
and drives the each color OPC
Drum.
the OPC Drum in the each color
drum cartridge through each joint,
and drives the each color OPC
Drum.
Refer to Color Motor Rotation Travel for Driv-
ing 3 Color (CMY) Drum Cartridges (P.113).
ing 3 Color (CMY) Drum Cartridges (P.113).
(2)
• Cyan Drum Cartridge (Developer) Joint
• Magenta Drum Cartridge (Developer) Joint
• Yellow Drum Cartridge (Developer) Joint
• Magenta Drum Cartridge (Developer) Joint
• Yellow Drum Cartridge (Developer) Joint
The Motor Rotation is transmitted to
the each Developer Block in the
each color drum cartridge through
ech joint, and drives the each color
Developer Block Mechanism.
the each Developer Block in the
each color drum cartridge through
ech joint, and drives the each color
Developer Block Mechanism.
(3)
• Cyan Toner Cartridge Joint
• Magenta Toner Cartridge Joint
• Yellow Toner Cartridge Joint
• Magenta Toner Cartridge Joint
• Yellow Toner Cartridge Joint
The Motor Rotation is transmitted to
the each color toner cartridge
through each joint, and drives the
each color Toner Cartridge Mecha-
nism.
the each color toner cartridge
through each joint, and drives the
each color Toner Cartridge Mecha-
nism.
Refer to Color Motor Rotation Travel for Driv-
ing 3 Color (CMY) Toner Cartridges (P.114).
ing 3 Color (CMY) Toner Cartridges (P.114).
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