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IC102
TC74HC174AF
LG
CPU
LSI106
HD6433298A42F
LVDD
P40
P41
KP0 ~KP5
(KO0 ~ KO5)
IC371
BA612
LED Driver
Q104 ~Q111
LED Driver
LS0 ~ LS7
La ~ Lg, Lp
KO Signal Generator
POWER AMPLIFIER (IC402: LA4598)
The power amplifier is a two-channel amplifier with standby switch.
The following table shows the pin function of IC402.
Pin No. Terminal In/Out Function
1 Power GND In Ground (0V) source
2 Ch1 B.S. Terminal for a bootstrap capacitor
3 Ch1 OUT Out Channel 1 output
4 VCC In +9V source
5 Ch1 N.F. In Negative feedback input
6 Ch1 IN In Channel 1 input
7 D.C. Terminal for a decoupling capacitor
8 Pre GND In Ground (0V) source
9 Stand by In Power control signal input. 0 V: Off, +9 V: On
10 Ch2 IN In Channel 2 input
11 Ch2 N.F. In Negative feedback input
12 Ch2 OUT Out Channel 2 output
13 Ch2 B.S. Terminal for a bootstrap capacitor
14 NC Not used
LED DRIVING