Printhead Driver Check - Epson LX-300+ Service Manual

LX-300+/1170

3.2.4.4 Printhead Driver Check

Simple check of the printer driver (Q3 ~ Q11) can be done by the following method.
Table 3-13. Printhead Driver Check
Item
1. Set the multimeter to the resistance
measuring range.
Printer driver
2. Connect the one side of the probe to the
base of the transistor.
3. Connect the one side of the probe to
emitter of the transistor.
Troubleshooting
Operation Specification
The resistance
should NOT be "0"
or infinity.
Troubleshooting
Revision C
68