Service Caution; A3.5.2 Olhv/Tlhv Circuit Diagram (2/2) - Oki OKIOFFICE44 Service Manual

A3.5.2 OLHV/TLHV Circuit Diagram (2/2)
This circuit consists of photo-sensors and high voltage generation unit.
Note: If the high-voltage unit inside the OLHV/TLHV circuit board is replaced, the output voltage and
current output from the terminals must be checked and adjusted. This section does not describe
the checking and adjustment methods, however.
DANGER:
Do Not
Touch !
HIGH VOLTAGE

Service Caution

The High Voltage Power Supply Unit in the OKIOFFICE 44 is mounted vertically on the
left side of the unit, with the land side fully exposed. This board develops voltages of
up to 1300 VDC as part of the normal printing process.
OKIDATA recommends that the unit be powered OFF (AC supply cord disconnected)
before removing the Main Cover for service. In the event that it is necessary to
troubleshoot the unit with the Main Cover removed, with AC power supplied, please
take every caution to avoid touching the exposed circuitry of the High Voltage Power
Supply Unit. To do so accidentally can result in a shock hazard.
Board Descriptions
DANGER
You may be subjected to high-voltage electric shock by touching the
following parts without an insulating material:
a. High-voltage unit
b. Contact ass'y
A - 47 OKIOFFICE 44 Serv. Man., P/N 59276801