Troubleshooting
Model: T645
Malfunction: Key malfunction – display keys
Circumstance: Press display keys; there is no reaction;
Or keys operate continuously.
Possible causes: 1. Display key switch malfunction:
2. Key cushions are out of place.
Troubleshooting: 1. Inspect key cushions.
2. Replace display key switches.
3-4-3
Display board
Tack switch
(Large)
Tack switch
(Small)
Tack switch
(large)
Key cushion
Tack switch
(small)
Summary of Contents for T645
Page 1: ...T645 Repair Manual Electronics Date 2014 1 6 V1 0...
Page 2: ...1 1 Product Illustration 1 1 1...
Page 3: ...1 2 Dispaly T645 1 2 1...
Page 4: ...1 2 Display T645 1 2 2...
Page 8: ...1 4 Connection T645 1 4 2...
Page 13: ...1 5 Cable connections EUp board 1 5 5 From Filter To Drive set To Display LED Keypad...
Page 14: ...1 6 Indicator LEDs T645 Display Board 1 6 1...
Page 15: ...1 6 Indicator LEDs T645 Drive Board 1 6 2 F1 fuse 15A...
