Sony HCD-V808 - Power Amplifier and Key Control ICs

– 86 –
IC901 LA5617
ON/OFF
CURRENT
LIMITER
START
CIRCUIT
VREF
OVER HEAT
PROTECT
ON/OFF
CURRENT
LIMITER
1
2 3
4
5 6 7 8 9 10
VCC
VMUTE VCC
VREF
ERROR
AMP
VREF
ERROR
AMP
VO1 VCC CN1
EN
EN DISPLAY
GND
NC
CN2
VEE
VO2
~_
1.8V
~_
140uA
COMPARATER
– PANEL Section –
IC751 M65850P
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
1
2 3
4
5 6 7
891014 13 12 11
CLOCK
RESET
MO
MI
D1
DO0
DO1
VCC CLOCK REF OP2IN OP2OUT LPF2IN LPF2OUT
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1 CC2
GND
– POWER AMP/KEY CONTROL Section –
IC1401 M65847FP-TP
1
2
3
4 5
6
7
8
ADCONT
DA1CONT
KEY DOWN
KEY UP
DAIINTIN ADINTOUT ADINTIN
LPF1
REF REF REF REF
HPF LPF2 MIX
CLKO/KEY0
SDATA/KEY1
SCK/KEY2
STROBE/KEY3
KEY4 KEY5
REF
GND
VCC
MODE2 MODE1 DAIINTOUT LPF1IN LPF1OUT HPFIN HPFOUT LPF2IN LPF2OUT MIXIN MIXOUT
DA2CONT
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
+
–
LOGIC
D/A
RESET RAM
A/D
CLOCK
GENERATOR
REF
+
–
+
–
+
–
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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