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CASIO KL1500
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of CASIO KL1500 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 7 (click to view)
CIRCUIT DESCRIPTION
Setting the batteries or AC adaptor (see figure 7) When setting the batteries or AC adaptor, the voltage VDD2 is always applied to RAM and CPU since Q6 and IC5 are turned on. Power on sequence (see figure 7) When the power switch is turned on, PON signal is being H (PON = VDD2). CPU knows to turn the power switch on, it provides H from VCON terminal to base of transistor Q4. Then both transistors Q4 and Q3 are turned on, the voltage VDD1 is applied to all devices. Power off sequence (see figure 7) When the power switch is turned off, POFF signal is being H(POFF= VDD2). CPU knows to turn the power switch off, VCON signal and base of Q4 will be L. Then both transistors Q4 and Q3 are turned off, Q3 stops to supply the voltage VDD1. Power down sequence (see figure 7) If the voltage across the batteries lowers and the terminal DPW of CPU comes less than 4.5V, VCON signal is L. Then both transistors Q4 and Q3 are turned off, Q3 stops to provide the voltage VDD1. Print sequence (see figure 7) When the PRINT button is pressed, TCON signal is H. Then both transistors Q2 and Q1 are turned on, the voltage VP for printing will be 9V.

Q1 Fuse
8.6V 8.8V 8.4V 0V 8.6V 8.8V 0V 0V 5.0V 4.8V

IC5
5.0V 4.8V

VP (+9 V) VDD2 (+5 V)
Q3
4.8V 0V

8.4~0V 8.4~0V

VDD1 (+5 V)

+
8.6V 8.8V 0V 0V 0V 0V

4.2V 4.8V

+
0V 4.8V 4.8V 0V

Q2

Q4
0V 0V

GND

VDD1
VCON DPW IC1 PON VDE TCON ON POFF

CPU

OFF

Power Switch Note : The voltages around transistors mean as follows; Upper figure : Power ON at no operation. Lower figure : Power OFF. Figure-7
â5â

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