BBK SP550S, Руководство по обслуживанию

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11
OUT 3
OUT 4
VCC
INPUT 3
INPUT 4
CLIP DET
S-GND
PW-GND
STAND-BY
SUR
INPUT 2
INPUT 1
VCC
OUT 2
OUT 1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Pin connection (Top view)
CPU IC AT89C2051 POWER IC TDA7370B
8-bit microprocessor 4-channel audio amplifier
RST/VPP
(RX1) P3.0
(TX1) P3.1
XTAL2
XTAL1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VCC
P1.7
P1.6
P1.5
P1.4
P1.3
P1.2
P1.1 (AIN1)
P1.0 (AIN0)
P3.7
PDIP/SOIC
Pin structure
Features:
V2~+6v Max.+6.6v
Max. I/O current:20mA
I/O numbers:15
RAM:128 bits
FLASH EEPROM:2K
Features:
V18V Max.+28V
Max. peak current:3.5A
Output Power(Vs=14.4V Rl=4 ohm,THD=10%,f=1kHz
6.5w*4
Full protection function
Max. work efficiency :24 MHz
THE EXPLANATION FOR KEY COMPONENTS
SP550S SERVICE MANUAL