Arcam DiVA AVR300, Service Manual

Page: 45 / 87

AVR300
SURROUND SOUND RECEIVER
- 44 -
MAIN BOARD
U102: P89C669FA
MAIN BOARD
U103: 24C08
VCC
8
7
4
6
5
3
2
1
GND
WP
SCL
LOAD
LOAD INC
DATA WORD
ADDR/COUNTER
Y DEC
X DEC
R/W
COMP
SERIAL
CONTROL
LOGIC
EN
H.V. PUMP/TIMING
DATA RECOVERY
EEPROM
SERIAL MUX
D
OUT
/ACK
LOGIC
DEVICE
ADDRESS
COMPARATOR
START
STOP
LOGIC
SDA
A2
A1
A0
D
IN
D
OUT
HIGH PERFORMANCE
80C51 CPU
96 kB
CODE FLASH
2 kB
DATA RAM
PORT 3
PORT 2
PORT 1 PORT 0
OSCILLATOR
CRYSTAL OR RESONATOR
UART 0
BAUD RATE GENERATOR
UART 1
TIMER 0 TIMER 1
WATCHDOG
TIMER
I
2
C
TIMER2
internal
bus
PCA
(PROGRAMMABLE
COUNTER ARRAY)
1 OUTPUT A
2
A
INVERTING A
3 NON INVERTING A
OUTPUT B
INVERTING B
NON INVERTING B 4 V-
8 V+
7
6
5
- +
B
- +
MULTI-CH BOARD
U406-U417: NJM5532M
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
GND
T1OUT
R1IN
C2+
C1-
V+
C1+
R1OUT
T1IN
T2IN
R2OUT
R2IN
T2OUT
V-
C2-
RS232 BOARD
U204: MAX232D