Chapter 3.
Faults and Troubleshooting
3–17
Troubleshooting The Hammer Driver Transistors
The Hammer Driver Transistors are located on the Engine Controller Board. When you are
having problems like Hammer Coil shorting or Hammers not firing, these components
should be checked along with the other components involved in the function.
To check the Hammer Driver for the malfunctioning hammer, use an Ohmmeter on its
lowest scale. Test the collector (C) to base (B) by placing the Positive (+) lead on the
collector terminal and the Negative ( – or Common) lead on the base terminal. If the
reading is either a short (0 Ohms) or an open (
∞
, infinity), the driver is bad and you should
replace the Engine Controller Board. If this check is OK, then test the base (B) to emitter (E)
by placing the positive (+) lead on the base terminal and the negative (– or Common) lead
on the emitter terminal. If the reading is either a short (0 Ohms) or an open (
∞
, infinity),
the driver is bad and you should replace the Engine Controller Board. Use the schematics
for the Engine Controller Board in the back of this manual to locate the correct driver
terminals to check for the hammer(s) you are having trouble with.
The Base of each segment of the driver goes to the LSI Chip, which turns On/
Off each segment. The Collector of each driver segment is connected to the
corresponding Hammer Coil.
Summary of Contents for T6215
Page 1: ...T6215 Maintenance Manual...
Page 3: ...Table of Contents Table of Contents...
Page 4: ......
Page 11: ...Preface Preface...
Page 12: ......
Page 14: ...T6215 Maintenance Manual Pref 2 Blank Page...
Page 15: ...Chapter 1 Chapter 1 Technical Overview...
Page 16: ......
Page 25: ...Chapter 2 Chapter 2 Menu Operations...
Page 26: ......
Page 42: ...T6215 Maintenance Manual 2 16 Blank Page...
Page 43: ...Chapter 3 Chapter 3 Faults and Troubleshooting...
Page 44: ......
Page 66: ...T6215 Maintenance Manual 3 22 Figure 3 2b Print Data Troubleshooting Sequence Continued...
Page 69: ...Chapter 4 Chapter 4 Removing and Replacing Components...
Page 70: ......
Page 109: ...Appendix A Appendix A Schematics and Parts lists...
Page 110: ......
Page 112: ...T6215 Maintenance Manual A 2 Notes...
Page 117: ...A 7 Appendix A Schematics and Parts Lists 3333E P2 Print Mechanism Assembly II...
Page 118: ...A 8 T6215 Maintenance Manual Print Mechanism Assembly III 3333E P3...
Page 119: ...A 9 Appendix A Schematics and Parts Lists Print Mechanism Assembly IV 3333E P4...
Page 132: ...A 22 T6215 Maintenance Manual Controller Circuit Board Assembly Page 4 of 10 3000D P4...
Page 134: ...A 24 T6215 Maintenance Manual Controller Circuit Board Assembly Page 6 of 10 3000D P6...
Page 136: ...A 26 T6215 Maintenance Manual Controller Circuit Board Assembly Page 8 of 10 3000D P8...
Page 138: ...A 28 T6215 Maintenance Manual Controller Circuit Board Assembly Page 10 of 10 3000D P5...
Page 142: ...A 32 T6215 Maintenance Manual Hammer Driver Circuit Board Assembly Page 3 of 5 3040C P3...
Page 148: ...A 38 T6215 Maintenance Manual 3190B P1 2 Ribbon Sensor Circuit Board Assembly...
Page 149: ...Appendix B Appendix B Downloading Firmware...
Page 150: ......
Page 152: ...T6215 Maintenance Manual B 2 Blank Page...
Page 153: ...Supplements Supplements...
Page 154: ......
Page 155: ...Supp 1 Supplements Supplements Please file here any supplements you receive...
Page 156: ...T6215 Maintenance Manual Supp 2 Notes...
Page 157: ...Index Index...
Page 158: ......
Page 162: ...T6215 Maintenance Manual Index 4 Blank Page...
Page 164: ......