Power Amp/Key Control Section - Sony HCD-V808 Service Manual

QQ
3 7 63 1515 0
IC901 LA5617
CURRENT CURRENT
ON/OFF
LIMITER LIMITER
VMUTE VCC
VREF
VCC
ERROR
AMP
1 2 3 4 5 6
– PANEL Section –
IC751 M65850P
14 13 12 11
TE
L 13942296513
OSCILLATOR
D/A
1/2 VCC
CLOCK DO1
MO
AUTO MAIN
RESET
RESET
CONTROL
MI
D1 DO0
A/D
LPF1
2 3 5
1 4
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http://www.xiaoyu163.com
START
ON/OFF
CIRCUIT
VREF
OVER HEAT
PROTECT
VREF
~ _ 1.8V
ERROR
AMP
7 8 9 10
10 9 8
LPF2
20KBIT
SRAM
6 7
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y
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http://www.xiaoyu163.com
8
– POWER AMP/KEY CONTROL Section –
IC1401 M65847FP-TP
Q Q
3 6 7 1 3
A/D
RESET
D/A
1 2 3 4 5 6
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– 86 –
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
– – –
LPF1 HPF LPF2
REF REF REF
CLOCK
RAM
GENERATOR
REF
LOGIC
7 8 9 10 11 12
m
co
9 9
2 8 9 9
–
MIX
REF
13 14