Electric Circuit Description; High-Voltage Transformer Control Circuit - Toshiba e-STUDIO2500c Service Manual

11.4 Electric Circuit Description

11.4.1

High-voltage transformer control circuit

[ 1 ] General description
The high-voltage transformer is controlled by the on-off signal of each bias output from the ASIC on the
LGC board, the clock signal for generating AC bias and the reference voltage signal (VR) output
through a D/A converter. The high-voltage transformer generates the output current or voltage of each
bias, based on the input +24V voltage (+24VD3).
LGC board
+24VD3
IC53
HVTSTS
Engine CPU
IC39
Adjustment value
NVRAM
Digital data
IC41
ASIC
HVTCLK
HVTMC/K
HVTDACC/K
HVTDDCC/K
IC56
ASIC
HVTTR1Y/M/C/K
HVTTR2
HVTECC/K
May 2006 © TOSHIBA TEC
High-voltage transformer
Analog data
(Reference voltage)
HVTMVRY/M/C/K
HVTDVRY/M/C/K
D/A
converter
HVTTR1VRY/M/C/K
IC76
HVTTR2VR
D/A
Analog data
converter
(Reference voltage)
Fig. 11-3
e-STUDIO2500c/3500c/3510c PROCESS UNIT RELATED SECTION
11 - 5
+24VD3
Leakage detection
Main charger bias
( Y/M/C/K )
Needle electrode
Needle electrode
bias
( Y/M/C/K )
Grid
Grid
bias
( Y/M/C/K )
Developer bias
( Y/M/C/K )
Developer AC
Magnetic roller
( Y/M/C/K )
Developer DC
1st transfer bias
1st transfer roller
( Y/M/C/K )
( Y/M/C/K )
2nd transfer
2nd transfer bias
facing roller
Recovery blade
Cleaner bias
( Y/M/C/K )
11