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CASIO M300
Service Manual


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

Description of CASIO M300 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 4 (click to view)
CPU (LSI101: MSM6387-22)
Containing a sound data ROM and a DAC (Digital to Analog Convertor), the CPU provides sound waveform in accodance with the pressed key and the selected tone. The following table shows the pin functions of LSI101. Pin No. 1, 2 3 4 5 6 7 8 9 10 11 ~ 18 19, 20 21 ~ 30 Terminal TEST1, TEST2 RESET AVDD OUT AGND GND COSI COSO VDD KI0 ~ KI7 KO11, KO10 KO9 ~ KO0 Out In In In In Out In In In In/ Out Function Not used. Connected to ground. Power ON reset terminal. On: +5 V +5 V sorce for the built-in DAC Sound waveform output Ground (0 V) source for the built-in DAC Ground (0 V) source 21.725 MHz clock pulse input Not used +5 V source Input terminals from keys and switches Not used Key and switch scan signal outputs Off: 0 V

Filter Block
Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.
AVDD Q101 2SC1740SQ R2106 C106 C108

R107

R108

R105

From CPU
C109
AG

To power amp

R104

AG

C107
AG

Amplifier/Voltage Regulator (IC101: AN8053N)
The right figure shows the internal block of IC101.

VCC 16

NC 15

CONT 14

5V VREG 13

NC 12

NC 11

NC PRE GND 10 9

5V REG POWER

SP AMP + 1 SPO 2 NC 3 4 5 PC-2 6 SPI 7

VREF

8 VREF

SP GND PC-1

SPM

â4â

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