Unico SQ Series - Auto-cell Positioning Failed

Trouble Shooting
- 63 -
6.7 Auto-cell check failed
Auto-cell holder positioning failed
Auto-cell holder motor works OK?
N
1. Replace IC 8255 of U17 on PCB
SST8.412.113
2. Replace PCB ST8.412.113
Y
The voltage level on pin 2 of J8 on
PCB SST8.412.113 changes within
0— 3.2V during the filter positioning?
Y
N
1. Solving the wiring from
auto-cell holder to auto-cell
holder connector
2. Solving the wiring from
auto-cell holder connector to
J3 on PCB SST8.412.113
3. Replace auto-cell holder
motor
4.Replace PCB
ST8.412.113
1. Solving the wiring from auto-cell
holder to auto-cell holder connector
2. Solving the wiring from auto-cell
holder connector to J8 on PCB
SST8.412.113
3. Replace auto-cell holder photo-
coupler
Y
N
DC +12V on pin 1 of CZ1 on
PCB SST8.412.113 OK?
Refer 6.18