Transfer/Separation Electric Current Control Circuit; Description; Transfer/Separation Control Circuit Diagram - Toshiba 1550 Service Manual

9.4 Transfer/Separation Electric Current Control Circuit

(1) Brief description
• The circuit generates voltage Vc for transfer and separation output current control.
• Change Vc
(2) Description of operation
Adjustment
nV-RAM
value
IC9
• Transfer/separation output adjustment value in nV-RAM is fed to main processor.
• The main processor outputs control voltage data through the GA to D/A converter.
• Analog conversion made by D/A converter.
• Control voltage is fed to transfer/separation transformer.
• Transfer/separation transformer generates output current which is proportional to control voltage
Vc.
* Adjustment of control voltage Vc (alteration of adjustment data) must be made in AJ mode.
IC10
CPU
1550/1560 DRUM
changes output current to linear.
Main
Digital
processor
data
GA
IC12
IC10
IC12 IC2
GA
D/A
IC9
nV-RAM

Transfer/separation control circuit diagram

Analog Vc
Transfer
D/A
separation
converter
transformer
IC2
J1-B8
J1-B9
9 - 10
Output
current
HV-TR-Vref
HV-SP-Vref
Mar. 1998 © TOSHIBA