1600/2000/2500 DRUM-RELATED SECTION
11 - 4
December 2000 © TOSHIBA TEC
11.5 High Voltage Output Control Circuit
11.5.1 Outline
This section describes the control circuit for each bias voltage and current for charging, development,
transfer, and separation.
11.5.2 Control method
Charging (Grid)
The CPU (IC66) loads reference voltage data for the grid into the register of the system control GA (IC34).
↓
The system control GA converts the data loaded into the register to a DI signal (ADC setting signal) in
serial format and sends it to the D/A converter (IC17) at the timing of the CLK signal (transfer clock signal)
and the LD signal (load data signal).
↓
The D/A converter converts the input data to a GVR signal (grid reference voltage signal) in analog form
and sends it to the HVPS.
↓
The HVPS generates high voltage based on the voltage value of the GVR signal and delivers it to the grid.
Charging (Main charger)
The I/O port GA-2 (IC6) turns the CCON signal (main charger control signal) to “Low” level.
↓
The HVPS generates constant-current and delivers it to the main charger.
IC6
I/O port
GA-2
IC34
System
control GA
IC66
CPU
Main PWA
CCON
1
4
74
74
CHO
3
4
26
IC11
TCON
3
76
76
THVCN
11
10
28
SPON
8
79
79
PG
13
12
14
PGON
10
82
82
SP
2
4
33
DVVR
2
75
75
DI
17
59
TCVR
77
77
LD
15
61
GVR
7
78
78
CLK
16
60
SPDVR
9
80
80
2
3
19
5
IC17
D/A converter
Relay PWA
CN24
CN21
HVPS
Main charger
CN1
CN15
Magnetic roller
Transfer charger
Grid
Separation charger
Paper guide plate
Pinch roller
11-05-01
Содержание DP1600
Страница 1: ...DIGITALPLAINPAPERCOPIER DP1600 2000 2500 File No 31100011 R0111216600 TTEC ...
Страница 2: ...Copyright 2000 TOSHIBA TEC CORPORATION ...
Страница 21: ...1600 2000 2500 OUTLINE OF THE MACHINE 2 8 December 2000 TOSHIBA TEC B 2 Switches SW2 SW1 02 02 04 ...
Страница 23: ...1600 2000 2500 OUTLINE OF THE MACHINE 2 10 December 2000 TOSHIBA TEC C 1 Motors M1 M3 M5 M7 M6 M4 M2 02 02 06 ...
Страница 145: ...8 PRINTING 8 1 8 1 General Description 8 1 8 2 Structure 8 2 8 3 Laser Diode 8 6 8 4 Disassembly and Replacement 8 7 ...
Страница 231: ...December 2000 TOSHIBA TEC 16 1 1600 2000 2500 PC BOARD 16 BOARD ASSEMBLY 16 1 PWA F MAN 16 01 01 ...
Страница 232: ...1600 2000 2500 PCB BOARD 16 2 December 2000 TOSHIBA TEC 16 2 PWA F RLY 16 02 01 ...
Страница 233: ...December 2000 TOSHIBA TEC 16 3 1600 2000 2500 PC BOARD 16 3 PWA F PIF 16 03 01 ...
Страница 234: ...1600 2000 2500 PCB BOARD 16 4 December 2000 TOSHIBA TEC 16 4 PWA F PNL 16 5 PWA F VR 16 04 01 16 05 01 ...
Страница 236: ...1600 2000 2500 PCB BOARD 16 6 December 2000 TOSHIBA TEC 16 7 PWA F FUS ASD AUD CND TWD SAD models 16 07 01 ...
Страница 237: ...17 WIRE HARNESS CONNECTION DIAGRAMS 17 1 ...
Страница 264: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8842 JAPAN ...