Problems And Solutions; General Problem Solutions - KERN TACJ Service Manual

8

Problems and Solutions

8.1 General Problem Solutions

Problem
Nothing appears on the display.
Numerals or symbols not displayed
properly
Key operation does not work.
"OL" or "-OL" is displayed.
TACJ/TACS-SH-e-1912
Cause
1) Power voltage not com-
patible
2) Problem with supply volt-
age or AC adaptor
3) Power board ASSY (B4)
fault
4) Display board ASSY (B2)
fault
1) Display board ASSY (B2)
fault
1) Switch board ASSY (C4)
fault
2) Display board ASSY (B2)
fault
3) Fixing fault in case ASSY
(3)
1) Contact with stopper
plate
(U14) and stabilizer pin
2) Pt-Ni band (U17) fault
3) Contact with force coil
ASSY
(L1) and magnet ASSY
(U9)
4) Force coil ASSY (L1)
fault
5) Damage to OPF (U1)
6) Detector ASSY (U11)
fault
7) Analog board ASSY (B3)
fault
Solution
Check the power supply, and
connect correctly.
Replace the AC adaptor.
Replace the power board ASSY
(B4).
Replace the display board ASSY
(B2).
Replace the display board ASSY
(B2).
Replace the switch board ASSY
(C4).
Replace the display board ASSY
(B2).
Refix the case ASSY (3) in place.
Realign the stopper plate (U14).
Check the Pt-Ni band (U17), and
connect correctly.
Reset or replace the force coil
ASSY (L1).
Replace the force coil ASSY
(L1).
Replace the unit ASSY (1).
Replace the detector ASSY
(U11).
Replace the analog board ASSY
(B3).
53