AND AD 4326 Digital Weighing Indicator Repair PC2677G AD4326

Symptom: Not working or always switching on by itself.
Cause: Batteries or power connected wrong polarity

Fix:
Check / Replace tantalum cap C20 on display board, 22uF/25V
Check / Replace U1 on display board, LM330T 5V low dropout regulator
Check / Replace Q1 on load cell board 2SA1020

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