Block Diagram - Sony ICF-SW7600GR - Portable Radio Service Manual

4-1. BLOCK DIAGRAM

FM TRACKING
ANT101
(TELESCOPIC)
T101 CT101
FM ANT
VT
Q120
J101
ATT
AM EXT ANT
(EXCEPT CH)
Q101
MUTING
MUTING
CONTROL
ROD B
Q107
SW
BPF
RF AMP
BAR B
Q105
TO Q112-116
ATT
S101 REG
ATT
OFF
Q106
ATT
ON
ANT102
RV101
(FERRITE-ROD)
ATT
Q116
LW/MW
RF AMP
Q112,113 Q114,115
ATT AGC
AGC
X301
75kHz
S301 - 323 KEY
S325 - 328 MATRIX
S329
HOLD
HOLD .
FREE
IC301
EEPROM
5
SDA
8 VDD
SCK 6
IC305
BATT 2 3.0V REG 3
IC303
2 3.5V DET 1
IC304
2 1
3.1V DET
SECTION 4
DIAGRAMS
FM TRACKING
T102 CT102
FM RF
Q104
FM
RF AMP
VT
1ST IF
T104 XF101 T105
AM MIX2 55.845MHz AM IFT1
Q109,110
+
AM MIX
Q108,121
AGC
AGC
Q119
1ST OSC
AMP
Q117
VCOL
Q118
AM VCO
1ST OSC
AMP
VT
LCD1
IC302
DIGITAL TUNING SYSTEM CONTROL LIQUID CRYSTAL DISPLAY
XIN 35
25
LCD0-14 ı
49
24
XOUT
31
COM0-3 ı
9
34
ı KS0-6
D301(BACK LIGHT)
3
Q301
LIGHT 1
13
LED DRIVE
KR0-3
ı
10
MUTING
MUTING 2
14 HOLD
BEEP
BEEP 52
SD 53
METER
METER 54
56 SI/SO
Q303,306
19
55 SCK EO VT
PLL LPF
Q302
+13V
CURRENT REG
VCOL
VCOL
20
23 VDD
Q304
VCOH
21
VCOH FM VCO
AMP
Q305
AM/FM
51 VDET B+ SWITCH
AM/FM 16
17
BAR/ROD
50
CE POWER 15
20 FEOUT 16
FMRF
19
AMIN
Q205
BAND 15 BAND
Q111
SWITCH
1ST
IF AMP
22 23
AM REG
VT
Q206
T202
FM VCO
BUFFER FM VCO
Q207
AM/FM
SWITCH
AM REG
IC202
PLL FM MPX
1 IN L 9
R 10
4 VCO
RV203
8
STOP
76k(MPX)
SD
Q216
+13V
DC/DC
CONVERTER
Q219
AM B
AM/FM
B+ SWITCH
Q220
Q217
FM REG AM/FM
ROD B AM/FM
B+ SWITCH
REG B+ SWITCH
Q218 Q221
BAR B AM/FM AM REG AM/FM
B+ SWITCH B+ SWITCH
9 9
IC201
FM/AM FRONT-END
IF,DET
CF202
CF203
10.7MHz
10.7MHz
DET 30
FMLIMIN
13 FMIFIN FMIFOUT 11 9
METER
CF201
455kHz
26
SD-OUT
CF205
14 5
AMIFIN DISCRI
DISCRI
10.7MHz
SD-CTRL/AGC
29
U/L
24 7 6 8 27
CF204
X201
3.64MHz
AM OSC2
CT201
55.390MHz RV201
SSB
(EXCEPT
SSB
0 BEAT
EA)
CT202 FINE TUNE
REG
Q202 Q202 Q201 Q201
SWITCH SWITCH SWITCH SWITCH
2ND LOCAL
Q203
MUTING
S201
AM MODE
AM REG
– SSB SYNC NORM –
Q214
LINE AMP
Q213
LINE AMP
NEWS
IC203
MUSIC
PRE/POWER AMP
S203
IN2 L
1 OUT2 7
Q212
TONE
STEREO
16 IN1 R 10
OUT1
CONTROL
NF2
4
BEEP
NF1
13
RV204
9
VCC
14 VOL
VOLUMEw
Q215
MUTING
IC204
Q222,225
2 7
+3V REG
B+ SWITCH
Q223
SWITCH
REG
ICF-SW7600GR
Q209 Q210
METER
2 FM AM
HIGH CUT HIGH CUT
SD
AM REG
Q211
AGC
Q210
MUTING
SWITCH
RV202
1
JUST
FM REG
TUNE
MUTING
S202
SYNC
LSB
USB
Q208
SWITCH
Q101
MUTING
MUTING
CONTROL
J201
LINE OUT
SP201
(SPEAKER)
J202
(HEADPHONES)
• Signal Path • Abbreviation
CH: Chinese model
: FM
EA: Saudi Arabia model
: MW/LW
Q224
: SW
B+ SWITCH
EXCEPT CH
J203
DC IN 6V
BATT
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION R6)
4PCS,6V