High-Voltage Power Supply Unit (Tlhv/Olhv) - Oki OKIOFFICE44 Service Manual

4.1.3.10 High-Voltage Power Supply Unit (TLHV/OLHV)

(1) Disassembly procedure
a) First, carry out procedure up to the point of the
4.1.3.2 (ID Unit, Cover-Rear, Cover-NCU and
Cover-MAIN).
b) Remove the three screws 1 and draw out high-
voltage power supply board (TLHV/OLHV).
c) Disconnect all the cables 3 and 4 from high-voltage
power supply board (TLHV/OLHV) and dismount
high-voltage power supply board.
Cable 3
TLHV/OLHV board
Screw 1
Caution: Note the following when assembling the high-voltage power supply board:
•
•
(2) Reassembly procedure
Reverse the disassembly procedures.
Disassembly
Cable 4
(CP4.1 Fig. 25)
Screw 1
Mount the high-voltage power supply board with Cover-top assembly removed or open.
Take care that cable 3 will not interfere with the paper sensor exit when it is connected.
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Service Manual, P/N 59276801
Service Caution:
The High Voltage
Power Supply PCB 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 pow-
ered OFF (AC supply
cord disconnected)
before removing the
Main Cover for service.
In the event that it is
necessary to trouble-
shoot the unit with the
Main Cover removed,
with AC power sup-
plied, please take every
caution to avoid touch-
ing the exposed cir-
cuitry of the High Volt-
age Power Supply Unit.
To do so accidentally
can result in a shock
hazard.
OKIOFFICE 44