Sony Dream Machine ICF-C795RC, Руководство по обслуживанию

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ICF-C795RC
– 9 – – 10 – – 11 –
4-1. BLOCK DIAGRAM
SECTION 4
DIAGRAMS
12
9
14 17
10
5 7
FM
FRONT-END
AGC
AMPLIFIER
ANTENNA
RECTIFIER &
INTEGRATOR
DECODER
FM
IF AMP
AF
POWER AMP
AM IF AMP,
AGC, DET
AM
FRONT-END
16
19
FM RF
IN FM/AM
FE OUT CF2
10.7MHz
CF1
450kHz
CF3
10.7MHz
FM
RF
FM
IF IN
2
FM
DISCRIMINATOR
TUNING METER
FM
DISCRI
27
AF
OUT
SP301
(SPEAKER)
AF
IN
23 24
DET
OUT
AM
IF IN
METER
NF VOL
15
1
2
3 4
FM/AM
BAND
SELECT
AM OSC
L5
AM OSC
L4
FM OSC
X50
75kHz
X451
77.5kHz
L1
AM FERRITE-ROD
ANTENNA
L451
FERRITE-ROD
ANTENNA
L451
ANT1
FM LEAD
ANTENNA
FM OSC
AM RF
IN
L3
FM RF
FM/AM FRONT-END,
FM/AM IF AMP, DET, AGC, AF AMP
IC1
FM/AM PLL
IC50
TIME CODE RECEIVER
IC451
SYSTEM CONTROLLER,
LCD DRIVER, KEY CONTROL
IC100
TC1
D4-1
B+
TC3
VR1
VOL
+ +
L4
FM VCO VOLTAGE
D74
A RADIO
D75
B BUZZER
S50
BRIGHTNESS
(LCD BACK LIGHT)
D70 – 73
(LCD BACK LIGHT)
D74 D75
–2
–1
L5
AM VCO VOLTAGE
L1, TC1
AM TRACKING
L3, TC3
FM TRACKING
T1
AM IF
B.P.F.
BPF1
LOW-PASS FILTER
Q50, 51
LED DRIVE
Q53, 54
MUTING
Q4
• SIGNAL PATH
: FM
: AM
05
D2
D3
AC IN
BACKUP B+
(SYSTEM CONTROLLER IC100 B+)
B+
BZ-CTRL
35
ALM A
6
ALM B
7
BUZZER
36
DATA
DATA IN
DA
PD1
27
5
15
CLK
CK
26
4
CE
CE
34
3
MUTE
PDET
33
28
RESET
18
AM IN
11
FM IN
XOUT
XIN
22 23
X101
4.19MHz
X1 X2
19 20
X100
32.768kHz
XT1
1
BIAS
2
VLC0
3
VLC1
4
VLC2 XT2 S0 – S23
12
P1
8
D100
D101
VT B+
RECT
D351 – 354
REGULATOR
Q57
T301
POWER
TRANSFORMER
RECT
D355
RESET SIGNAL
GENERATOR
IC101
COM0 – COM3
S101, 201 – 218
(KEY MATRIX)
60 – 37 61 – 64
KS0 – KS4
10 – 13, 8
KR0 – KR3
14 – 17
LIQUID CRYSTAL DISPLAY
LCD100
LCD REFERENCE
VOLTAGE GENERATOR
IC102
D4-2
D102
D60, 61
HIGH
LOW
REC
DEC
INT
RF
IN
Q2A Q2B
Q1A Q1B
25
13 14
FLA FLB
10 11
5 6
7 TCO
16 9
8
2
MAIN KEY board
MAIN board
TRANSFORMER board
ANTENNA board
ALARM KEY board
• Circuit Boards Location