Block Diagram - Main Section - Sony ICF-CD2000 Service Manual

7-3. BLOCK DIAGRAM – MAIN Section –
E
(Page 26)
F
(Page 26)
ANT1
FM / AM FRONT-END
FM/SW TELESCOPIC ANTENNA
IF DISCRI, IF AMP
(CD2000)
FM
D3
RF IN
B. P. F
10
BPF1
(CD2000S) D12
D1
CT3, L14
FM TRACKING
L14 FM RF
CT3
7
FM RF
D13
L15
(CD2000S)
FM OSC
5
D8
D6
RF
AMP
Q1
L8
SW CT1
CT1, L8
D9-1 ANTENNA
SW
TRACKING
SW / MW
SWITCH
Q8
(CD2000)
CT2
L7
AM
D5
AM (MW) RF RF IN
FERRIRE-ROD AMP 8
CT2, L7
ANTENNA Q3
AM (MW) TRACKING
D10
L12 SW
SW
SWITCH
OSC Q5
L12
SW FREQUENCY
MW COVERAGE SW
SWITCH SWITCH
Q4
Q2
D9-2
L13 MW
AM SOC
SWITCH 3
AM (MW) OSC
Q6
L13
(CD2000)
AM (MW) FREQUENCY
COVERAGE
FM IN
12
AM IN
11
SW / MW
6
PD
16
AIN
17
AOUT
18
XIN
19
DC / DC
X1
CONVERTER
75kHz
Q74-76,
XOUT
20
T70
B04
05
13
– 27 –
FM / AM FRONT-END
IF DISCRI, IF AMP
IC1 (1/2) IC1 (2 / 2)
FM
FM / AM
CF3
IF IN
FE OUT
FM 10.7MHz FM IF DET OUT IN
12 15 21 1
FRONT-END DISCRI
Q9 Q11
MUTING MUTING SYNC •
CF1 FM DISCRI
2
DETECTOR
10.7MHz
METER 16
T1
AM IF
CF2 AM
450kHz
IF IN
AM IF STEREO
14
DISCRI DET
Q10
FM / AM
SELECT
AFC / AGC1
20
13 18 6
RV2
FM AUTO
SCAN
AM
FRONT-END
D405-408
(LCD BACK LIGHT)
KEY MATRIX
S402, 403, 421,
422,424, 701-715
FM / AM PLL
S423
IC3
OPEN
12BITS
AM / FM
5
PROGRAM-
MABLE IF MUT
7
DIVIDER
IF IN
DATA
SHIFT REGISTER 10
LATCH
MO / ST
8
D434
AM / FM
9
PHASE
DETECTOR
CHARGE
PUMP
DO
4
CL
REFERECE CCB 3
DI
DIVIDER I / F
2
CE
1
– 28 –
MPX
IC2
MIX AMP
LOW-PASS FILTER AMP
IC302 (1 / 2)
LCH
OUT
9 6 7
RCH
DECODER
OUT
10 R-CH
TONE
VCO
TUNER
AMP
MUTE
IC301 (1 / 4),
Q311
IC302 (2 / 2),
8 4
IC303 (2 / 2),
Q101, 201, 104,
204, 305
RV1
FM VCO
B+ (CD3.4V)
S301
MEGA BASS
MUTING
Q913 ON
B+
OFF
B+
IC301 (2 / 4)
9 8
10
LCD401
(LIQUID CRYSTAL DISPLAY)
B+
64 – 67 31 – 40, 43 – 60
COM0 – COM3 S4 – S31
BUZZER
BUZ 4 DRIVE
Q402, 415
LED DRIVE BEEP
73 LED ON 30
Q403, 405, BEEP MUTE MUTE
411, 412
Q401
RCK 76
SL+ 75
SL- 74
SHOCK 1
RESET
D433
SIGNAL
RES 7 3 2 B+
GENERATOR
IC403
SYSTEM CONTROLLER,
D904
LCD DRIVER
IC401 AC IN 28
BATT 21
S401
(OPEN MAIN)
18 OPEN AUDIO
A MUTE 72 MUTE
Q406
TUNER
TU ON 71 ON SWITCH
6 LMT
Q404
CD
26 WRQ
CD ON 70 ON SWITCH
19 AFC Q410
20 REG
SHIFT 29
78 80 79 77 27 22 2 3 23 24 8 9 5 25 11 12
X402
3MHz
D409
X401
D425 (1 / 2)
32.768kHz
LEVEL
D423 (1 / 2)
SHIFT
D424 (1 / 2)
Q407, 408
D426 (1 / 2)
MUTING
CONTROL
SWITCH
Q904
C B A
K
D
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(Page 23)
(Page 26)
– 29 –
POWER AMP
IC303 (1 / 2)
RV301 IC101
VOLUME R-CH
6
7 7 1
5
3 MUTING
Q102
MUTING
Q103
BEEP
MUTE
Q310
HEADPHONE
SWITCH
Q312
D102
R-CH
MUTING MUTING MUTING
B+
CONTROL CONTROL CONTROL
SWITCH B+ SWITCH SWITCH
SWITCH
Q907 Q910 Q909 Q308, 309
B+
SWITCH
Q914
D905
B+
SWITCH
Q908
B+ B+
B+ SWITCH SWITCH
Q905, 912 Q906
D901 D428
IC301 (3 / 4)
(1 / 2)
3 1
2
D427 RCK
G
D428 (2 / 2) SL+
H
D429 SL-
I
B+
B+
D401 D903
+3.4V REGULATOR B+
B+ 3 2 J
IC402
J901
DC IN 6V
D413 –
D412
D402
BAT401
LITHIUM DRY BATTERY
BATTERY
SIZE "AA"
3V
(IEC DISGNATION R6)
(FOR BACK-UP) 4PCS. 6V
D404
D420
D403 BATT D421
B+
DET
(CD3.4V)
Q413, 414
• SIGNAL PATH
: FM
+3.3V REGULATOR
B+ 3 2 B+
IC901
: AM (MW)
: CD PLAY
ICF-CD2000/CD2000S
J301
SP101
SPEAKER
L CH
SP102
SPEAKER
R CH
B+
B+
B+
SWITCH
Q301
IC301 (4 / 4)
14 13
12
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