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CASIO ML3
Service Manual


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

Description of CASIO ML3 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 6 (click to view)
CPU (LSI1: MSM6521-13)
Containing a sound data ROM and a DAC (Digital to Analog Converter), the CPU provides sound waveform in accordance with the pressed key and selected tone. The CPU also drives LEDs in the illuminated keyboard directly. The following table shows the pin functions of LSI1.

Pin No. 1~7 8 9 10 ~ 13 14 ~ 17 18 19 20, 21 22 23 24 ~ 26 27 28 29 30 31 ~ 38 39 ~ 46 47 ~ 58 59 60

Terminal LY1 ~ LY7 LVDD1 LGND2 LX0 ~ LX3 LX4 ~ LX7 LVDD2 GND2 COSI, COSO VDD GND1 TEST1 ~ TEST3 RESET AVDD OUT AGND KI0 ~ KI7 KO0 ~ KO7 â LGND1 LY0

In/Out Out In In Out Out In In In/Out In In In In In Out In In Out â In In

Function Keyboard LED drive signal output +5 V source for the built-in LED driver Ground (0 V) source for the built-in LED driver Keyboard LED drive signal output Not used. +5 V source for the built-in LED driver Ground (0 V) source 21.725 MHz clock pulse input/output +5 V source Ground (0 V) source Not used. Connected to ground. Reset signal input. Power OFF: 0 V, Power ON: +5 V +5 V source for the built-in DAC Sound waveform output Ground (0 V) source for the built-in DAC Input terminal for keys and switches Key and switch scan signal input Not used. Ground (0 V) source for the built-in LED driver Keyboard LED drive signal output
C12

Filter Block
Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.
AVDD

T2 2SC1740SQ R12 C9
R11 C10

R13

R14

C11

AG

AG

AG

â4â

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