SATO TG308, Service Manual

Page: 142 / 252

Section 6: Checks and Adjustment Procedures
Page 6-4
TG3 Series Service Manual
6.2 CHECKING THE DIRECT-CURRENT POWER SUPPLY
This checking procedure enables checking various direct current voltages of the
Main PCB (CONT board)
.
These checking activities require the use of a multimeter and may be performed with or without the assistance
of the
SATO Test Module
. The test module is a purchase option.
Required Tools:
• Digital multimeter
• Phillips screwdriver
• SATO Test Module, optional
1.
Switch off the printer.
2.
Base on the
Media ejection slot
as the front, locate the
large
housing cover
that is the left-most panel. Locate the
two screws at the bottom part of this cover. With a Phillips
screwdriver, remove these two screws.
3.
From the bottom of the
left housing cover,
lift the cover
upward as shown and remove the cover.
4.
Locate the
CHK connector
on the top right corner of the
Main PCB (CONT board)
.
When using the optional
Test Module
for checking, connect the optional
Test Module
to the
CHK con-
nector
as shown below.
If
Test Module
is not available, direct measurement on
CHK connector
is possible. Refer below illustra-
tion to locate the required pins.
5.
Turn on the printer and set the digital multimeter to direct-current voltage mode.
When using the
Test Module
, set the module's switch [Test Module dial setting as specified below]. Con-
nect the
[+]
and
[-]
probe of the multimeter to the
Test Module
.
If
Test Module
is not available, connect
[+]
probe of the multimeter to “
CHxx
” and
[-]
probe to “
CH1A
” of
the
CHK connector
as specified below.
• Connect
[+]
probe to
CH3A
,
[-]
probe to
CH1A
, and then measure at +5.0V (Test Module dial setting:
0).
• Connect
[+]
probe to
CH4A
,
[-]
probe to
CH1A
, and then measure at +1.7V (Test Module dial setting:
1).
• Connect
[+]
probe to
CH5A
,
[-]
probe to
CH1A
, and then measure at +3.3V (Test Module dial setting:
2).
• Connect
[+]
probe to
CH6A
,
[-]
probe to
CH1A
, and then measure at +24.0V (Test Module dial setting:
3).
6.
Turn the printer OFF.
Media
ejection slot
screws