December 2000 © TOSHIBA TEC
7 - 11
1600/2000/2500 SCANNER
DP2000/2500 series
The motor control IC (IC4) turns the LAMP signal to the HIGH level.
The transistor (Q3) turns on and the LAMP turns to the GND level.
The transistor (Q3,Q5,Q7) on the Inverter PWA turns on to apply +24V to the switching regulator
IC(IC1).
IC1 turns on FET (Q1).
Current flows through the Np winding of the transformer (T1) where energy is accumulated.
IC1 turns off Q1. At this time, the energy accumulated in winding Np is supplied from the Ns
winding of the secondary circuit as electric power. As IC1 turns on and off Q1 in this way, high-
frequency electric power is supplied from the secondary circuit of T1 and fed to the exposure lamp
for lighting.
IC1 monitors the input voltage and controls the on/off time in response to the fluctuation in the
input voltage. It shortens the on time of Q1 when the input voltage rises, and extends the on time
of Q1 when the voltage drops.
IC1
Scanner MPU
Exposure lamp
IC4
Motor
control IC
IC1
Switching
regulator
CN2
PG
PG
CPUA0~19
Scanner control PWA
Inverter PWA
CPUD0~15
LAMP
58
+24V
F1
VCC
Q3
Q2
Q5
2
1
3
1
3
2
1
3
14
1
Q2
CN1
CN2
Np
Ns
T1
Q7
08-05-02
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 ...