Read Sony ICF-M350V Service Manual online
ICF-M350V
– 3 –
– 4 –
– 5 –
2-1.
BLOCK DIAGRAM
2.
DIAGRAMS
Adjustment Location:
D205
L204
TV OSC
D206
L205
FM OSC
1
5
BAND-PASS
FILTER
BPF201
ANT1
FM/TV
TELESCOPIC
ANTENNA
TV
RF AMP
FM
RF AMP
TV IN
FM IN
+
15
TV RF
14
FM RF
12
FM OSC
11
FM OSC
9
MIX OUT
BUFFER
IF AMP
TV
OSC
FM
OSC
8
IF
OUT
6
MODE
SW
MODE
SWITCH
D203
L202
TV RF
CT201
CT201, L202
TV TRACKING
D204
L203
FM RF
CT202
CT202, L203
FM TRACKING
T201
MIX IFT
FM IF
FM/TV RF AMP, OSC, MIX, IF AMP
IC201
LEVEL
SHIFT
Q105
LEVEL
SHIFT
Q102
24
23
TV LOCAL IN
FM LOCAL IN
25
AM LOCAL IN
39
FM/TV BAND
SELECT SWITCH
Q203, 204
AM
FRONT-END
11
15
IF
OUT
AM RF
IN
IN
AM
OSC
OSC
AM FRONT-END
IC1 (2/2)
D2
CT1
L1
AM FERRITE-ROD
ANTENNA
AM TRACKING
CT1, L1
FREQUENCY
COVERAGE
L2
AM OSC
AM IF
T1
AM IFT
CF1
450kHz
17
3
CF4
IF AMP
Q201
CF201
10.7MHz
CF2
10.7MHz
18
FM
IF AMP
FM
IF AMP
TUNING
METER
FM
DISCRIMI-
NATOR
+
20
METER
16
BAND
AM
IF IN
IF IN
FM
DISCRI
DISCRI
FM
IF IN
IF IN
24
DET
HIGH-CUT
MUTE
Q2
25
Q1
TV/MW. FM
20
BEEP
27
PD OUT
19
MUTE
AF POWER
AMP
28
AF
OUT
AF
IN
IN
9
REG OUT
TU B+
FM/AM IF AMP, DET, AF AMP
IC1 (1/2)
4
5
NF
VOL
VOL
RV1
MUTING
Q3
J52
v
(EARPHONE)
SP51
(SPEAKER)
36
COMPARATOR
IC51 (2/2)
BATTERY CHECK
IC51 (1/2)
TU B+
MW/FM. TV
LOW-PASS
FILTER
Q101, 103, 104
DC/DC
CONVERTER
Q106, 107, T101
B+ SWITCH
(FOR FM/TV)
Q202, 205
2.4V
(FM/TV)
Q206
+2.4V
REGULATOR
IC53
4.5V
B+ SWITCH
Q55
38
RADIO POWER
ON/OFF
B+ SWITCH
Q56
+3V
REGULATOR
IC52
3V
D52
–
+
DC IN 4.5V
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
3PCS. 4.5V
POWER ON/OFF
CONTROL
Q54
29
RESET SIGNAL
GENERATOR
IC102
D104
8 – 1, 56 – 51
LCD3 - LCD16
14 – 12
COM1 - COM3
44 – 42
KEY SCAN0-
KEY SCAN2
48 – 45
KEY RET0-
KEY RET3
LIQUID CRYSTAL
DISPLAY
LCD101
KEY MATRIX
S101-112
S103
5
S102
1
S109
–
S112
+
S108
3
S105
2
S101
CLOCK/
ENTER
S104
ALARM
S107
BAND/STANDBY
S110
KEY PROTECT
S102, 103, 105, 108, 111
PRESET TUNING
TIME SET
S111
4
S106
POWER
TUNE/
TIME
SYSTEM CONTROLLER,
LCD DRIVER, KEY CONTROL
IC101
• SIGNAL PATH
: TV
: FM
: AM
6
05
J51
CE
L1
CT1
L2
AM VT Voltage
Adjustment
T1
AM IF Adjustment
– MAIN BOARD (Component Side) –
AM Tracking Adjustment
TP (SP–)
– MAIN BOARD (Conductor Side) –
TP (SP+)
TP13 (AM VT)
TP2 (GND)
TP14 (DET OUT)
TP202 (FM/TV IN)
– KEY BOARD (Component Side) –
TP201 (GND)
TP204 (FM IF)
TP119(GND)
TP118 (FM VT)
CT202
– KEY BOARD (Conductor Side) –
L203
FM Tracking
Adjustment
T201
FM IF Adjustment
L202
CT201
TV Tracking
Adjustment
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