Electrical - Printronix L1024 Maintenance Manual

5.4.2 Electrical

The transfer system has a very limited electrical function. It includes only the transfer corona. See Block
Diagram 5–1.
Backplane Board
Block Diagram 5–1. Transfer Subsystem Electrical Components,
The transfer corona is a small (60 µm) wire that is charged to +4,600 volts ( 100 volts) DC. The input for
the Transfer Corona (Block Diagram 5–1) is connector pin CN–3 from the High Voltage Power Supply
(HVPS). This connector pin is on a spring-loaded connector that is located under the left side of the
Transfer Charger, near the Waste Toner Cup.
NOTE:
When the /TRANSFER signal goes low (zero volts), the HVPS turns on the voltage to the Transfer
Corona Wire. This voltage then causes the developed image to transfer from the OPC Drum to the paper.
Chapter 5 – Transfer Subsystem
+24VB
1 1
/CHARGE
/DEVELOPER
J10 /TRANSFER
BGND
6 6
+5
1 1
/WASTE
J9 TNRLOW J1
DGND
4 4
Transfer Corona
The Corona Baseplate is grounded to the Charger Baseplate.
HIGH VOLTAGE
POWER SUPPLY
CN1
TONER
CN2
SENSOR
BOARD
OPC
TRANSFER
CORONA
DEVELOPER
BIAS
TONER
SENSOR
DEVELOPER
5–7