User Guide

Page 11
(8). Trouble shooting (cont’d.)
Symptoms Possible Causes Remedies
Insufficient capacity of battery Replace the battery if “BATT” mark is
displayed on the LCD.
Bad fit of Jaw. Make sure that the Jaw is completely closed.
Replace the jaw if it cannot be completely
closed and do re-adjustment.
Re-adjustment of PCB Check above points first. If there is no
problem, PCB needs to be re-adjusted.
When measuring
resistance,
error of measurement is
notable.
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
Insufficient capacity of battery Replace the battery if “BATT” mark is
displayed on the LCD.
Bad fit of jaw. Make sure that the jaw is completely closed.
Replace the jaw if it cannot be completely
closed and do re-adjustment.
Re-adjustment of PCB Check above points first. If there is no
problem, PCB needs to be re-adjusted.
When measuring
AC current, error of
measurement is notable.
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
Button spacer is missing. Put the button spacer at the specific
location.
Any button doesn’t work.
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
Poor contact of buzzer Soldered point at buzzer should be checked. Buzzer doesn’t sound.
(when a button is operated
or in Buzzer mode)
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
Wrong function is selected. In case that “” isn’t displayed on the LCD
as a unit, press A/ button several times and
select the resistance measurement function.
“OPEN” mark doesn’t
appear while jaws are
opend.
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
A break in jaw wiring Make a continuity test of jaw wiring. If there
is no continuity, replace the jaw and do
re-adjustment.
“OPEN” mark doesn’t go
off after closing the jaws.
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
Measuring the current flowing
line.
Turn off the device, which is generating the
current, to minimize the current.
Two or more 61-920 are clamping
onto one same line
Use only one 61-920 per line.
“NOISE” mark doesn’t
go off
Defect of circuit component Check above points first. If there is no
problem, replace the PCB, and do
re-adjustment.
Form number TM61920 Rev 4 July 2008