Johnson T3X, Service Manual

Page: 51 / 69

51
CHAPTER 5 : Troubleshooting
4. Unplug the ribbon cable from connector (Fig-4)
Fig-4
5.measure ribbon cable resistance between 1 2 3 4 point (Fig-5)
Fig-5
①
Place probe on Pins 1 and 3 value should be
around 300 Ω or 700 Ω
② Place probe on Pins 2 and 4 value should be
around 300 Ω or 700 Ω
6. Unplug ribbon cable then plug back in . check if function is normal.
7 .If function still is not normal . exchange the touch panel module and start from step 1.
8. If function is normal after changing touch panel . It can determine touch panel module defect.