Arcam DiVA AVR250, Service Manual

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AVR250
SURROUND SOUND RECEIVER
21
22
16
15
20
23
8 7 17 14 13 12 11 10 9
5
4
3
2
18
19
24
1
6
XIN
FMIN
AMIN
CE
DI
CL
D0
OUT0 OUT1
XOUT
PHASE DETECTOR
CHARGE PUMP
REFERENCE
DIVIDER
SWALLOW COUNTER
1/16, 1/17 4 BIT
SHIFT REGISTER
LATCH
UNIVERSAL
COUNTER
1
2
12-BIT PROGRAMMABLE
DIVIDER
SYC
OUT2 OUT3 OUT4 OUT5 OUT6 IN0 IN1
V
SS
V
DD
LCTR
HCTR
PD2
PD1
TUNER BOARD
U903: LC7218
VIDEO BOARD
U801, U803, U804, U808,
U809, U812, U818: BA7625
1 MONITOR OUT 16 IN1
2 GND 15 CTL A
3 IN5 14 VOUT1
4 GND 13 VCC
5 IN4 12 IN2
6 CTL E 11 CTL B
7 INT3 10 VOUT 2
8 CTL D 9 CTL C
6dB
LOGIC
LOGIC
6dB
1
COMPOSITE
SYNC OUTPUT
0.1 µF
0.1 µF
680 k Ω
ODD/EVEN OUTPUT
Vcc
5-12V
RSET
BURST/BACK PORCH
OUTPUT
VERTICAL
SYNC OUTPUT
COMPOSITE
VIDEO INPUT
8
2 7
3 6
4 5
VIDEO BOARD
U802: LM1881