Sony ICD-80 Service Manual ▷ View online
ICD-80
– 5 –
– 6 –
– 7 –
4-1.
BLOCK DIAGRAM
SECTION 4
DIAGRAMS
12
13
J101
MIC
PLUG IN POWER
MIC101
MIC
SP101
(SPEAKER)
J102
(EARPHONE)
@
MIC SENSE
SWITCH
Q103
AGC CIRCUIT
D101, D102,
IC103, Q104
IC103, Q104
VOR
DETECTOR
IC104
LEVEL SHIFT
Q704 (1/2)
DATA
LATCH
IC107
DECIMETER
TIMING
GENERATOR
L.P.F.
B.P.F.
COMPRESSOR
ADPCM
DECODER
A/D
CONVETER
INTER-
POLATOR
L.P.F.
D/A
CONVETER
L.P.F.
TONE
CONTROL
LINE
MUTING
Q105
VOLTAGE
DETECTOR
IC503
DC/DC
CONVERTER
IC504
DC/DC CONVERTER
CONTROL
IC505, Q502
+3.3V
REGULATOR
IC501
+2.1V
REGULATOR
IC551
REGULATOR
Q101, 102
RESET SIGNAL
GENERATOR
IC502
B+
SWITCH
Q501
GAIN DOWN MUTING
Q107
BACK LIGHT
LED DRIVE
Q503
D503
(BACK LIGHT)
SWITCH UNIT
(PLAY: GREEN)
(REC: RED)
(PUSH: PLAY/STOP)
POWER
AMP
IC105
STANDBY
SWITCH
Q106
EXPANDER
ADPCM
DECODER
LEVEL SHIFT
Q704 (2/2)
AIN1
GSX1
14
15
AIN2
GSX2
27
BCLKA
28
BCLKB
26
XSYNC
25
RSYNC
1
13
RESET
21
PDN
1
INH
24
MCK
9
CLK
10
DATA
11
CE
5
IS
16
VFRO
OUT
4
2
1
4
24
23
OUT
2
XT
6
XT
1296 DIVIDER
IC106
ADPCM
IC101 (1/2)
ADPCM
IC101 (2/2)
FLASH MEMORY
IC702
SYSTEM CONTROLLER
IC701
IC102
X702
6.912MHz
X703
10.368MHz
X701
32.768kHz
CLOCK SWITCH
IC703
OSCO
46 POS LE
44 POS DAT
45 POS CLK
65 PO XSDW
76 XSYNC
67 POA CLK
33 PO WLOK
39 PI COM0
70 POD SCK
71 POD STB
60
63
PO LCDV
KEY A/D
52 PO LCDR
57 PO SPC
58 PO LPC
PO0 – PO7
I/O0 – I/O7
3 POA PDN
4 POA RES
10 PI VOR
68 PIA IS
69
POA IR
12
PO MUTE
51
PO PAMP
53
PO BEEP
1
PO PMUT
93
POR CLE
2
CLE
94
POR ALE
3
ALE
95
4
96
42
98
SE
30
PO LIGH
9
PI HOLD
40
SE
99
5
LED DRIVE
Q551
ROTARY
ENCODER
KEY
WAKE-UP
Q701 – 703
27
POL PLY
26
POL REC
6
43
WE
RE
WP
CE
7
41
R/B
4
IR
5
PO MIC
OSCI
40 PI COM1
41 PI COM2
42 PI COM3
77 PI REQ
50 PI C/D
50 PI C/D
48 PI TEST
32 PO OPT
38 PI WLNK
21
20
XO
XI
CLOCK GENERATOR
IC704
1
IN
6
5
3
CLOCK SWITCH
IC705
Q705
1
2
7
78
PI WAKE
8
PI ERS
81
PI POTB
80
PI POTA
72 POD DAT
31 PO ACK
D701
SCK
STB
VDD
VDD2
VLCD
VREF
DATA
REFERENCE
VOLTAGE
SWITCH
Q706
LCD MODULE
BP701
8
9
10
11
12
13
7
1
2
3
4
5
6
DATA0 (COM0)
DATA1 (COM1)
DATA2 (COM2)
DATA3 (COM3)
DATA4 (REQUEST)
DATA5 (SCLK)
DATA6 (C/D)
DATA7 (TEST)
DATA0
DATA1
DATA2
DATA3
DATA0
DATA1
DATA2
DATA3
STATUS4 (SDATAO)
STATUS5 (SDATAI)
STATUS6 (OPT)
STATUS7 (ACK)
GND (WAV LINK)
CN703
DIGITAL I/O
+
RV101
VOL
POR CE
WP
POR RE
POR WE
84 – 91
18 – 21, 24 – 27
S702
ERASE
S703
STOP
FILE
OPR
= – + +
PRIORITY
MENU
S705
REC
56
PO BOP
79
PI OPEN
14
PO BACK
13
PO BOT
15
PO REGU
11
PI DET3
82
RST
OFF
ON
9 HOLD
S704
DRY BATTERY
SIZE “AAA”
(IEC DESIGNATION R03)
2PCS. 3V
POWER AMP
(IC105) B+
+2.1V
LED B+
MIC CIRCUIT B+
+3.3V
BACK UP B+
BACK UP B+
D501
BT501
BACK UP
CONTROL
SWITCH
Q552
S501
RESET
• SIGNAL PATH
: PLAY
: REC
S701
BATTERY LID
OPEN/CLOSE DETECT
PIR R/B
– 13 –
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC701
@¡
(XO)
1 V/DIV, 10 µs/DIV
2
IC701
@¢
(OSCO)
1 V/DIV, 50 ns/DIV
3
IC704
6
(Rec LP mode)
1 V/DIV, 50 ns/DIV
4
IC504
4
(LX) (Stop)
1 V/DIV, 500 µs/DIV
2.5 Vp-p
32.768 kHz
2.8 Vp-p
10.368 MHz
4 Vp-p
6.912 MHz
3.8 Vp-p
10
µ
s
– 14 –
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC101
MSM7560LGS-KDR1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
28
27
26
25
24
23
21
20
19
18
17
22
AIN1
GSX2
SG
LPS
AOUT+
AOUT–
PWI
VFRO
GSX1
AIN2
PCMRI
PCMRO
XSYNC
IS
BCLKA
PCMSO
PCMSI
BCLKB
IR
RSYNC
X2
X1
VDD
AG
DG
+
–
+
–
+
–
RC
L.P.F.
RC
L.P.F.
A/D
CONVERTER
TIMING
GENERATOR
D/A
CONVERTER
REFERENCE
VOLTAGE
DECIMETER
INTER-
POLATOR
B.P.F.
L.P.F.
COMPRESSOR
ADPCM
DECODER
ADPCM
DECODER
EXPANDER
O
I
O
I
O
I
O
I
I
O
S/P
S/P
S/P
S/P
S/P
O
I
S/P
-1
PDN
MCK
RES
IC104
NJM2072M
1
2
3
4
5
6
7
8
INPUT
GAIN CONT
AMP OUT
GND
VCC
OUTPUT1
RECOVERY
TIME CAP
TIME CAP
OUTPUT2
– 15 –
IC106
SM5158AM-E2
IC107
TC7W74FU
IC704
XC2141C21AMR
10
11
XIN
XOUT
DATA
9
CLK
LE
FR
LD
1
2
13
7
DOA
12
DOP
5
OR
16
OV
15
FV
3
FIN
8
16 BIT R COUNTER
16 BIT N COUNTER
17 BIT SHIFT REGISTER
16 BIT LATCH
PHASE
DETECTOR
LOCK
DETECTOR
CHARGE
PUMP
BUFFER
16 BIT LATCH
6
CLR
7
PR
8
VCC
5
Q
R
S
Q
3
Q
2
D
4
GND
1
CK
Q
D
C
1
2
3
4
5
6
XT
VSS
VDD
Q0
INH
XT
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