III
- 12
3.2.9 Oscillation Circuit
Fig. 3.2-10 shows the oscillation circuit. It generates 14.74 MHz source which acts as a
CPU basic clock. The CPU synchronizes its internal operations.
Fig. 3.2-10 Oscillation circuit
3.2.10 Tape End Sensor Circuit
Fig. 3.2-11 shows the tape end sensor circuit.
To detect the tape end, the CPU monitors the voltage level on AN2. If the zebra tape
(black/transparent) provided at the end of tape passes through the tape end
photosensor, the CPU recognizes that the tape runs out according to the voltage
change.
Fig. 3.2-11 Tape End Sensor Circuit
Содержание PT-2500PC
Страница 1: ...SERVICE MANUAL MODEL PT 2500PC ...
Страница 2: ...SERVICE MANUAL MODEL PT 2500PC ...
Страница 5: ...CHAPTER I SPECIFICATIONS ...
Страница 11: ...CHAPTER II MECHANISMS ...
Страница 49: ...CHAPTER III ELECTRONICS ...
Страница 68: ...CHAPTER IV TROUBLESHOOTING ...
Страница 72: ...IV 3 3 The ON OFF lamp LEDs will not come on 4 No printing is performed ...
Страница 73: ...IV 4 5 Interface malfunctions 6 No tape cutting ...
Страница 74: ...IV 5 7 Tape feeding error ...
Страница 75: ...IV 6 ...
Страница 76: ...APPENDICES Circuit Diagrams A Main PCB B Power Supply PCB ...
Страница 79: ...Nov 98 5V2086BE0 Printed in Japan ...