Jadever JCL Service Manual

JADEVER SCALE CO., LTD - www.dongminhphat.com
17 JCL Service Manual - www.cantudong,com
Problem
Possible Cause
Basic Inspection and
troubleshooting
Lead-acid battery
defective
Remove battery and power on by using
charging transformer to see if the failure is due
to battery defect.
Charging transformer
problem
Please try a normal charging transformer to
see if the scale can be powered on.
CPU / Crystal
11.0592M (oscillating
circuit) fault
Replacement is needed.
LCD or related LCD
circuit fault
After confirming that there is no broken board
line or short circuit of connection between LCD
and other conducting objects, please replace
LCD.
Power circuit fault
Please check the working voltage of CPU (pin
44)/LM2930/TIP32C/Q7/4069(pin3/6/14)/Q5,
then replace the one which working voltage is
abnormal.
Power on
failure
Malfunction in ON/OFF
switch
Replace the ON/OFF switch
Lead-acid battery
defective
Remove battery and power on by using
charging transformer to see if the failure is due
to battery defect.
Charging transformer
problem
Please try a normal charging transformer to
see if the scale can be powered on.
1. Fuse burn down, replacement is required.
2. Check D2/ Q1(D313)/U5
Q2/Q3/Q4,then replace the defective
components.
3. Charge lamp defective, replacement is
required.
Charging
Failure or
Service Life
Shortened
Components or power
circuit defective
4. The polarity or the charging lamp is
reversed.

Jadever JCL Specifications

General

Brand	Jadever
Model	JCL
Category	Scales
Language	English