DOWNLOAD Panasonic UF-6300 / UF-6200 / UF-5300 (serv.man3) Service Manual ↓ Size: 5.4 MB | Pages: 117 in PDF or view online for FREE

21

     

UF-6300/6200/5300

     

High Voltage is provided through a DC to DC converter, which changes the +24 VDC supply voltage to -
650 VDC, and output approximately 0.64 KVAC (Steady current: 200 

µA) for the Charging Block. The 

Developer Circuit converts the +24 VDC to between -300 VDC for the development bias, and outputs 
1,500 VAC (p-p) at a frequency of 1.650 kHz to charge the toner. The Transfer Circuit changes the +24 
VDC supply voltage to approximately +280 VDC (MAX) (steady current:3 

µA/-1500 VDC steady voltage).

GND

GND

Q44

R394

R399

IC32

R398

GND

R397

R400

C214

R78

+5v

+24V

+3.3V

+3.3V

+3.3V

D26

C263

GND

PC001

1

2

6

4

+24V

R221

Thermistor

PSU (LVPS)

pSSRA

GND

Q43

Q42

79

SC PCB

2

1

CN52

TH2

D25

TH2

11

CN6

11

CN103

(ANI1)

IC1

CPU

R401

R396

R395

IC3

SHINE

22

     

UF-6300/6200/5300

     

This safety circuit turns OFF the +24 VDC supply voltages when the Cover is opened. When the Cover is 
opened, the microswitch(es) on the ILS PC Board are de-actuated, turning OFF +24 VDC to the Printer 
Drive Circuit, the High Voltage Power Supply, and the Paper Feed Solenoid Circuits, turning OFF the +5 
VDC supply voltage for the Laser Driver circuits on the Laser Unit.

GND

Q40

FG

Discharge Plate

Bias Transfer Roller

Bias Charge Roller

Development Roller

Q39

Q38

HVPS

CPU

pCR0

pCR1

pTR0

CN53

3

4

GND

T

C

D

5

SC PCB

Toner
Cartridge

Q41

pDRCK

2

nDRCK

nTR0

nCR1

nCRCK

23

     

UF-6300/6200/5300

     

The laser control signals are described below.

The LSU is activated when this output signal is LOW. If an error occurs, the nLDEN output signal level 
goes High and the LSU is deactivated.

This is the actual Data Signal. The Laser is ON when the nVIDEO output signal level is LOW.

This horizontal synchronization signal transmitted from the Beam Detection Sensor sets the horizontal 
position of the laser beam as it crosses the OPC Drum.

This is the Scanner Motor Control Signal. The Scanner Motor rotates when the nSTART output signal 
level is LOW.

A Phased-Lock Loop (PLL) circuit keeps the Scanner Motor speed constant when the nREADY is at a 
Low output signal level.

+24V

LVPS

(Power Supply Unit)

+24V

+24V

Cover

+24VD

ILS PCB

Paper Feed Solenoid

Laser Unit

DC/DC

Converter

Rush Current

Protection Circuit

pMPOW

HVPS
(Power Supply Unit)

Motor

(SC PCB)

+24VM

+24VM

+24VM

+24VM

L+5V

Interlock Safety Circuit Block Diagram

24

     

UF-6300/6200/5300

     

This is the Scanner Motor Clock.

This is  the Sample Hold Signal in order to adjust the Laser power. When the Laser switches on 
compulsorily, the Laser Power is adjusted to a suitable level and held until the next duty cycle in order to 
keep the Laser Power stable.

Laser

Timing

Sensor

Scanner

Motor

Laser

Drive

Circuit 

Scanner

Motor

Drive

Circuit

IC3

SHINE

nVIDEO

nS/H

nLDON

nHSYNC

nPMON

LSU

+3.3V

Q24

IC34

IC35

C190

R330

C189

Q23

Q21

Q22

+5V

R328

R326

SC PCB

6

1

5

2

3

CN68

CN69

23

20

19

nPMRY

nPMCK

2

1

30

163

24

21

GND

INPUT

INPUT

CIRCUIT

RECTIFIER
CIRCUIT

CONVERTER
CIRCUIT
(Q100)

+5 VP OUTPUT

-5 VDC OUTPUT

+24 VDC OUTPUT

GND

GND

0

A-B Voltage

C

A

B

D

GND

CONTROL

CIRCUIT

OVER CURRENT

LIMITTER

ERROR DETECTION

CIRCUIT

+5 VDC

OUTPUT
CIRCUIT

+5 VP OUTPUT

GND

+5 VP OUTPUT

CIRCUIT

-5 VDC

OUTPUT
CIRCUIT

+24 VDC
OUTPUT
CIRCUIT

C103

0

C-D Voltage 

0

E-F, G-H Voltage