CASIO M200
Instrukcja Serwisowa

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

AVDD

T1 2SC1740SQ R6 R5 C5 R11 C9 C10 C11 R7 R8

From CPU

To Amplifier
AG

AG

AG

Amplifier/Voltage Regulator (IC1: AN8053N) Consisting of an amplifier and a voltage regulator, AN8053N amplifies the sound signal from the CPU and also provides the CPU +5V source. The following figure shows the internal block of IC1.
5V VREG 13

VCC 16

NC 15

CONT 14

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

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