Jadever JWE, Руководство по обслуживанию

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JADEVER SCALE CO., LTD
JWE service manual 17
defective required.
2. Please check D2/D313/LM723/
rectifier, then replace the defective one.
3. Charge lamp defective, replacement is
required.
4. The polarity or the charging lamp is
reversed.
Poor LCD
Display
LCD defective After confirming that there is no broken
board line or short circuit of connection
between LCD and other conduction
objects, please directly replace LCD.
Component or part defective Please check / replace U10(HT1621B)
Incorrect
weighing
Component or part defective Please check / replace AD5530/4.9152M
Load cell Malfunction Replacement is required
Buzzer
does not work
Component or part defective Please check / replace CPU/Q7
BUZZER defective or buzzer
circuit fault
Replacement is required
Keypad
dysfunction
Keypad or keypad circuit fault Check/replace keypad or keypad circuit.
CPU/CPU program effective Check/replace CPU
Memory
dysfunction
Power circuit fault Please check R28/29/30/CP18 and make
sure there is no shortcut
CPU/CPU program effective Check/replace CPU
Component or part defective Please check / replace U7
Print dysfunction Wrong setting
Please check /reset external device/ baud
rate/print mode
RS-232 board defective Please check/replace RS-232 board.
Bad connection between
RS-232 board and main board
Please check/replace the wire connection
Defective in external device Maintenance/replacement is need.
Battery symbol Insufficient cell voltage Please recharge the battery
Rechargeable battery failure If the voltage of the battery is lower than
5.7V and the battery indication lamp is still
in green color, please immediately replace
the rechargeable battery.
Component defective Please check/replace R3/R4/AD5530
CPU/CPU program effective Check/replace CPU
LCD backlight
no function
Wrong setting Please check/ reset the backlight function
LCD backlight defective Replacement is required
Component defective Please check/replace Q9 / Q11