Hvps (High Voltage Power Supply) Section - Panasonic KX-FLB802CX Service Manual

KX-FLB802CX/KX-FLB812CX/KX-FLB802CXS/KX-FLB812CXS

6.16. HVPS (High Voltage Power Supply) SECTION

6.16.1. HVPS SPECIFICATION
Charge (CHG)
Output Characteristics Constant current
Nominal Output Voltage 4.35KV
Nominal Output Current 200±15µA
Load Range (19.4MΩ)
Constant Current 4.1~4.6KV
Range
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.
6.16.2. CHG-BIAS (Charge BIAS)/GRID/ UNIT
When IC604 turns on the transistor Q614, CHG REM becomes "L", and Charge BIAS (200µA) is output from CHG OUTPUT.
GRID BIAS is generated by the current flowing in the GRID circuit via charge wire and GRID.
Grid Developing DC
Constant voltage Constant voltage
4.75±10V 230V±15V
(50~300V)
PWM20%
200µA 300MΩ
100MΩ~2000MΩ
60
Developing AC Transfer (TRA) -
Rectangular Constant current
Wave (Variable)
300V±15Vp-p 100MΩ
17.5KHz (1400V)
-14.8µA±1µA
(0µA~25µA)
PWM 35%
100MΩ~2000MΩ 33.8MΩ~284MΩ
500V~4200V
Transfer (TRA) +
Constant voltage
800V±100V
1000MΩ
(1.25µA)
10MΩ~1000MΩ