Sony ZS-2000 Service Manual page 46

IC301 BD3859AFV
40 39 38 37
0dB
TREBLE1
31dB
VCC/2 VCC/2
1 2 3
IC804 MSM9805-549RS
I3
1
I4
2
I5
3
2M BIT
ROM
DATA
CONTROLLER
RESET 4
PCM
XT/CR
5
SYNTHESIZER
NAR 6
10
GND 7
10 BIT DAC
VREF 8
& LPF
AOUT 9
IC601 U4226B-MFSG3
20 19 18
17 16 15 14
POWER
SUPPLY
AGC
AMPLIFIER
1 2 3
4 5 6
36 35 34 33 32
TREBLE2
BASS 2 BASS 1
VCC/2 VCC/2
VCC/2 VCC/2
4 5 6 7 8
6
18 BIT
ADDRESS
MULTIPLEXER
CONTROLLER
18 BIT
I/O
ADDRESS
INTERFACE
COUNTER
TIMING OSC
CONTROLLER
XT/CR
13 12 11
DECODER
RECTIFIER &
INTEGRATOR
7 8 9 10
– 64 –
31 30 29 28 27 26 25 24
DYNAMIC DYNAMIC
BASS1 BASS2
VCC2
VCC2
9 10 11 12 13 14 15
I2
18
17 I1
16 I0
15
ST
14 CPU/STD
OSC3/TEST
13
OSC2
12
OSC1
11
10 VDD
23 22 21
VCC
LOGIC
16 17 18 19 20