Block Diagram - Sony ICD-55 Service Manual

4-1.

BLOCK DIAGRAM

ADPCM
IC101 (1/2)
AIN2
L.P.F.
6
CONVERTER
MIC101
MIC
AGC CIRCUIT
BUFFER
MIC AMP
D101, 102,
IC103 (2/2)
IC103 (1/2)
Q104
MIC SENSE
SWITCH
Q103
FLASH MEMORY
IC702
I/O0 – I/O7
18 – 21, 24 – 27 2 3 4 42 40 5 43 41
6 91 – 98 14 11 10 17 19 7 13
20
FMIO0 – FMIO7
1 2 86
WAKE UP CONTROL
SWITCH
Q701 – 703
S701 – S705 S706 – S710
• SIGNAL PATH
: PLAY
: REC
05
SECTION 4
DIAGRAMS
28 27
IS
A/D DECIMATION ADPCM
COMPRESSOR
B.P.F. 26
FILTER ENCODER
PDN 14
DEN 21
22 29 30 31 19 20
DIVIDER
IC104
REAL TIME CLOCK
IC703
X701
SI
32.768kHz
9 OSCIN SCLK
SO
CE
8 OSCOUT
INTR
1 32KOUT
IC706
GATE SWITCH
IC705
16 15 85 74 18
4 3 64
TP701
(TEST)
S711 S712
C HOLD PLAY SPEED
OFF FAST
HOLD NORMAL
SLOW
– 7 –
SYSTEM CONTROLLER
IC701
IR
72 DSPIS DSPIR 73 25
71 XPDRST
65 XDSPDEN
LMUTE
5
LPMODE 89
4 76 RTCDO
2 77 RTCCLK
BEEP 21
3 75 RTCDI
RTCCE
7 70
6 87 RTCINT
LIQUID CRYSTAL
82 XT1 DISPLAY
79 X2
X702
5MHz
80 X1
LIGHT 22
LEDPB 67
66
LEDREC
AMPPO 68
POWER
XSPOWER 69
SWITCHING
Q508
XRESET 84
BATT 100 BATT B+
ADPCM
IC101 (2/2)
24 23
ADPCM INTER- D/A
EXPANDER L.P.F. L.P.F.
DECODER POLATOR CONVERTER
POWER AMP
+
IC102, Q108, 109
LINE MUTING
Q105
TONE CONTROL
SWITCH
Q150
LED DRIVE D503
Q505 (LCD BACK LIGHT)
ND701
D504
OPR
LED DRIVE
(PLAY)
Q506 (1/2)
GRN
LED DRIVE
(REC)
Q506 (2/2)
RED
B+ SWITCH
1.5V
Q106, 107
(POWER AMP (IC102) B+)
3.5V
(LED B+)
+3.3V DC/DC
3.3V
REGULATOR CONVERTER
(ADPCM (IC101) B+)
IC503 IC502
3.3V
DC/DC
SYSTEM CONTROLLER (IC701), FLASH
CONVERTER
MEMORY (IC702), REAL TIME CLOCK (IC703) B+
IC501
RESET SIGNAL
GENERATOR
IC505
– 8 –
ICD-55
RV101
VOL
VFRO
8
SP101
(SPEAKER)
J101
EAR
BATT B+
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
OSC 1P. 1.5V
Q502
VOLTAGE
DC/DC CONVERTER
DETECT
CONTROL
IC504
Q507