POWER AMPLIFIER (IC402: LA4598)
The power amplifier is a
The following table shows the pin function of IC402.
Pin No. | Terminal | In/Out | Function | ||
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1 | Power GND |
| In | Ground (0V) source | |
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2 | Ch1 B.S. |
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| Terminal for a bootstrap capacitor |
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3 | Ch1 OUT |
| Out | Channel 1 output | |
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4 | VCC |
| In | +9V source | |
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5 | Ch1 N.F. |
| In | Negative feedback input | |
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6 | Ch1 IN |
| In | Channel 1 input | |
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7 | D.C. |
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| Terminal for a decoupling capacitor |
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8 | Pre GND |
| In | Ground (0V) source | |
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9 | Stand by |
| In | Power control signal input. 0 V: Off, +9 V: On | |
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10 | Ch2 IN |
| In | Channel 2 input | |
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11 | Ch2 N.F. |
| In | Negative feedback input | |
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12 | Ch2 OUT |
| Out | Channel 2 output | |
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13 | Ch2 B.S. |
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| Terminal for a bootstrap capacitor |
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14 | NC |
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| Not used |
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LED DRIVING
LVDD
La ~ Lg, Lp
LS0 ~ LS7
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| CPU | |
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| Q104 ~Q111 | LSI106 | |
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| LED Driver | ||
IC371 |
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IC102 | HD6433298A42F | |||
BA612 | ||||
LED Driver | TC74HC174AF |
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| P40 | |
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| KP0 ~KP5 | P41 | |
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| (KO0 ~ KO5) | ||
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| KO Signal Generator |
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LG |
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— 16 —
