EPSON Stylus Color 300 Service Manual
Rev. A
5-2
Symptom
Condition
Cause
Checkpoint
Solution
Self-test
printing is
abnormal.
No printing.
PWM signal is
not output.
Is PWM signal waveform correct at pin
140 of IC1?
Replace IC1
Head drive
voltage
generation
circuit does
not operate.
Check waveform of the signal VO:
Replace any
defective
components:
Q1/2/4/7/8 or
QM1/3/4/5/6/7/8
Carriage
does not
operate
normally.
Drive signals
are not
output
correctly.
CPU (IC2) is
defective
Is the signal waveform correct at pin 5/6
of IC2?
Replace IC2
CR Motor
driver (IC8) is
defective
Is the signal waveform correct at pin
3/6/18/21 of IC8?
Correct:
Replace CR
Motor
Incorrect:
Replace IC9
Содержание Stylus Color 300
Страница 1: ...EPSON TERMINAL PRINTER EPSON Stylus Color 300 SERVICE MANUAL EPSON 4007996 ...
Страница 5: ...REVISION SHEET Revision Issued Contents A July 2 1997 First issue ...
Страница 23: ...CHAPTER 2 OPERATING PRINCIPLES 2 1 OVERVIEW 2 1 2 1 1 PRINTER MECHANISM 2 1 2 1 1 1 Printhead Unit 2 1 ...
Страница 32: ...CHAPTER 5 TROUBLESHOOTING 5 1 OVERVIEW 5 1 5 1 1 Unit Repair C224 MAIN Board 5 1 ...
Страница 36: ...CHAPTER 6 MAINTENANCE 6 1 OVERVIEW 6 1 6 1 1 Maintenance Request 6 1 ...
Страница 38: ...APPENDIX A 1 OVERVIEW A 1 A 2 EEPROM Address Map A 2 A 3 CIRCUIT DIAGRAM C224 MAIN BOARD A 4 ...
Страница 42: ...EPSON Stylus Color 300 Service Manual Rev A A 4 A 3 CIRCUIT DIAGRAM C224 MAIN BOARD ...
Страница 44: ...EPSON SEIKO EPSON CORPORATION ...