Chapter 4 Troubleshooting; Preliminary Checks; Problems And Solutions - Jadever JWE-3K Service Manual

JADEVER

4-1 Preliminary checks

1. Is the battery electricity capacity OK?
2. Is AC power cord correctly plugged?
3. Is the weighing pan the right one?
4. Is there anything under the weighing pan?
5. Is the scale at a flat and steady base?
6. Are there any vibrating, rotating, and/or reciprocating equipment around?
7. Is there any air turbulence within the environment?
8. Is there any equipment that generates magnetic field around?
9. Is there rapid temperature change within the environment?
Are there any cooling and/or heating sources around?
10.

4-2 Problems and Solutions

Problems
Error in LCD 1、 Malfunction in battery wire & battery
display, LCD 2、 Malfunction in the power circuit
backlight, or 3、 Malfunction in the switch
buzzer 4、 Malfunction in LCD, LCD driver or the
sounding
5、 Malfunction in backlight, backlight
The AC 1、 Malfunction in the fuse of the power
power can
not be 2、 Malfunction in the fuse of the
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CHAPTER 4 TROUBLESHOOTING

Any intention to replace PCB and/or to repair components on the board
must proceed cautiously and carefully; otherwise
further irreversible damage(s) may be caused.
Possible Causes
related circuit of LCD
driver or the related circuit of backlight
socket
JCE/JWE
Note！:
Check and replace.
Check and replace.
Service Manual - V05
Solution
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