Panasonic KX-FLC413UA Service Manual ▷ View online
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KX-FLC413UA
6.17. HVPS (High Voltage Power Supply) Section
6.17.1. HVPS Specification
As for the developing voltage, the DC voltage and AC voltage are overlapped and output from an output terminal.
There is one terminal for transcription output and + and - are switched to be output.
There is one terminal for transcription output and + and - are switched to be output.
Charge (CHG)
Grid
Developing DC
Transfer (TRA-)
Transfer (TRA+)
Output Characteristics Constant current
Constant voltage
Constant voltage
Constant current
(Variable)
(Variable)
Constant voltage
Nominal Output Voltage 4.25KV
475±10V
220V±15V
100M
Ω
(-800V)
800V±100V
Nominal Output Current 180±15
µA
180
µA
300M
Ω
-8
µA±1µA
(-4
µA~-25µA)
PWM 58%
1000M
Ω
(0.8
µA)
Load Range
(19.4M
Ω)
100M
Ω~2000MΩ
62.5M
Ω~312MΩ
10M
Ω~1000MΩ
Constant Current
Range
Range
4.1~4.6KV
-500V~-2500V
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KX-FLC413UA
6.17.2. CHG-BIAS (Charge BIAS)/GRID Unit
When CHG REM becomes “L”, IC604 turns ON the transistor Q614, and Charge BIAS (200
µA) is output from CHG OUTPUT.
GRID BIAS is generated by the current flowing in the GRID circuit via charge wire and GRID.
6.17.3. TRA(+) BIAS (Transfer(+) BIAS)/TRA(-) BIAS (Transfer(-) BIAS) Unit
When CHG REM is “L” and TRA CLK is “open”, Charge BIAS (200
µA) is output from CHG OUTPUT, and at the same time Transfer
(+) BIAS (800V) is output from TRA OUTPUT. When 5.425kHz PWM (Pulse Width Modulation) signal is input to TRA CLK through
transistor Q609, Transfer (-) CURRENT BIAS corresponding to PWM signal is output from TRA OUTPUT.
transistor Q609, Transfer (-) CURRENT BIAS corresponding to PWM signal is output from TRA OUTPUT.
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KX-FLC413UA
6.18. Heat Lamp Control Circuit
The temperature of the fixing part of the Fixing Unit is converted to a voltage by THERMISTOR and input to IC106-4pin. The
heater turns ON/OFF the photo-coupler PC2 at the heater control port (IC106-29pin), and is turned ON/OFF at the triac SCR1.
And two thermostats are set on the AC line as the safety devices.
heater turns ON/OFF the photo-coupler PC2 at the heater control port (IC106-29pin), and is turned ON/OFF at the triac SCR1.
And two thermostats are set on the AC line as the safety devices.
1. Control at Printing
a. After the printing signal is received, turn ON the heater.
b. After that, turn ON the motor at the Primary Stable Temperature (150
b. After that, turn ON the motor at the Primary Stable Temperature (150
°C).
c. After that, control at the Secondary Stable temperature (170
°C), N/N(25 - 30°C), and feed papers.
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KX-FLC413UA
Refer to Call Service Troubleshooting Guide (P.152)
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