Resistance Values Of Printer Mechanism Components - Epson TM-U220 Series Service Manual

Confidential
The locations of the main elements on the main circuit board unit are identified below.
CN8
CN7

Resistance Values of Printer Mechanism Components

Part Name
Carriage motor
(1034)
Receipt paper
feed motor
(1046)
3-22 Troubleshooting
Q1
Internal Element
4-phase stepping motor
4-phase stepping motor
Q7
U9
Function Where to Check
Head carriage Remove the cable connector
drive connected to CN7 on the
main circuit board. Test
between pin 1 and pin 3 and
between pin 2 and pin 4.
Receipt paper Remove the cable connector
feed connected to CN8 on the
main circuit board. Test
between pin 1 and pin 3 and
between pin 2 and pin 4.
CN6
CN4
F3
Normal Status
Approx. 7.2 Ω
(per 1 phase)
Approx. 7.2 Ω
(per 1 phase)
Rev.A