Block Diagram - Sony Discman D-180AN Service Manual

IC BLOCK DIAGRAMS
r
IC401 MPC18A26VMEL
1
RS
DC IN DETECT
DCDT 2
3
RF2
ERROR AMP
4
INM2
PWM2
5
INP2
6
DTC3
RF1 7
8
INM1 –
+
INP1 9
PWM1
10
CMP1
11
DTC1
VREF 12
SWEN 13
VCPU
LOW VCPU
DETECT
RSTB 14
15
CKOUT
OSC2
16
SYNC
SYSTEM
PCON 17
CONTROL
18
CHGON
IC301 TC9438FNEL
24 23 22 21 20
DATA
INTERFASE
CIRCUIT
DINAMIC
BASS BOOST
CIRCUIT
ATTENUATER OPERATIONAL CIRCUIT
OUTPUT
CIRCUIT
TEST ANALOG
CIRCUIT FILTER
1 2 3 4
SAWTOOTH
PWM4
SUB
REFERENCE
BANDGAP
REFERENCE
SET-UP
DC/DC
CONVERTER
REGUL ATOR
19 18
17 16
MICRO COMPUTER
INTERFASE
OSC
CIRCUIT
TIMING
GENERATOR
DIGITAL FILTER CIRCUIT
DEEMPHASIS FILTER CIRCUIT
Σ-∆ MODULATION CIRCUIT
OUTPUT
CIRCUIT
ANALOG
FILTER
5 8
6 7 9
– 24 –
36
INM3
ERROR
AMP
35
RF3
34
DCIN
CHARGE SW 33
CHGSW
32
BATM
CHARGE
31
CHGOUT
AMP
30
VIN
VG
29
VOUT2
28
NC
VG
27
VOUT1B
VG
26
VOUT1
VG
25
UPCK1B
VG
24
UPCK1
23
VG
22
VDO
21
SW
20
VCPU
19
GND
15
14
13
10 11 12