DOWNLOAD Sony ICF-C773 / ICF-C773L Service Manual ↓ Size: 1.16 MB | Pages: 29 in PDF or view online for FREE

Model
ICF-C773 ICF-C773L
Pages
29
Size
1.16 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-c773-icf-c773l.pdf
Date
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Sony ICF-C773 / ICF-C773L Service Manual ▷ View online

ICF-C773/C773L
17
17
ICF-C773/C773L
4-7. SCHEMATIC DIAGRAM  – KEY, LCD BOARD SECTION –
S301
S302
S303
S304
S305
S306
S307
S308
S309
S310
C301
C302
C303
C304
R301
R302
R303
R304
RV301
R305
C305
S311
S312
RV302
R306
R307
S313
S314
S315
S316
R210
R211
R212
R213
R205
R207
R209
R201
R202
COM1
COM2
COM3
COM0
LCD0
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
LCD8
LCD9
LCD10
LCD11
LCD12
LCD13
Q201
Q202
D201
D202
W201
W302
W301
W303
CN301
C201
CN302
JC301
JC302
JC303
JC304
JC306
JC308
JC307
R208
R206
R204
R308
1000p
1000p
1000p
1000p
10k
10k
10k
10k
100k
220k
0.01
50k
47k
10k
0
0
0
0
100
2.2k
1k
2.2
2.2
2SC4154-F
LED DRIVER
2SC4154-F
LED DRIVER
SDPW50H0B0000-JP
BACK LIGHT
SDPW50H0B0000-JP
BACK LIGHT
23P
10P
7P
5P
3P
1
7P
0
0
0
0
0
0
0
470
2.2k
100
0
L CONT
KR3
KR2
KR1
KR0
KS3
KS2
KS1
KS0
GND
D.S.T./          CLOCK
ALARM B
ALARM A
ALARM MODE
VOLUME
LIGHT
STANDBY
BRIGHTNESS
LIGHT
CONTROL
TUNE/TIME SET+
TUNE/TIME SET-
LIGHT ON/OFF
LIGHT SLEEP
BAND/RADIO ON
ALARM RESET
SLEEP
NAP
ENTER/TUNE MODE
SNOOZE/SLEEP OFF
RADIO OFF/
1
5
10
15
20
23
LIQUID
CRYSTAL
DISPLAY
LCD201
LIGHT1
GND
LIGHT2
COM0
COM1
COM2
COM3
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
LCD8
LCD9
LCD10
LCD11
LCD12
LCD13
LCD0
GND
LED +B
REG
VOL
GND
W303
BOARD
MAIN
(1/2)
BOARD
MAIN
(2/2)
BOARD
MAIN
(2/2)
(Page15:AEP,UK)
(Page13:US,CND,IT)
(Page15:AEP,UK)
(Page13:US,CND,IT)
(Page12:US,CND,IT)
(Page14:AEP,UK)
ICF-C773/C773L
18
18
ICF-C773/C773L
4-8. PRINTED  WIRING  BOARD  –  POWER BOARD  –
• See page 20 for Circuit Boards Location.
R409
R408
R407
R402
R401
R406
R405
R403
R410
R411
C404
C410
CN401
C408
C407
11
(11)
1-865-817-
D402
D401
D403
D404
C403
C405
C406
C402
C401
L404
L401
PS401
Q402
Q401
B
C
E
B
C
E
Q403
Q404
BCE
ECB
D408
D407
D405
D406
BOARD
POWER  
1
7
B
MAIN
BOARD
(Page 11)
2
3
4
5
A
1
B
C
D
 : Uses unleaded solder.
Ref. No.    Location
D401
B-4
D402
B-4
D403
A-2
D404
B-2
D405
B-5
D406
B-5
D407
B-1
D408
B-1
Q401
B-4
Q402
B-4
Q403
B-4
Q404
C-5
• Semiconductor
Location
ICF-C773/C773L
19
4-9. SCHEMATIC DIAGRAM  – POWER BOARD –
Q401
Q402
L404
10uH
L401
38uH
D401
D402
D403
D404
R408
R409
R410
R411
R405
R406
R407
C410
JW404
JW403
C405
C406
R401
C401
C404
R402
C408
Q404
C403
C402
CN401
C407
D405
D406
D407
D408
PS401
Q403
R403
KTC3203Y-AT
+4.1V
REGULATOR
KTC3203Y-AT
+4.4V
REGULATOR
RD5.1ESB2
RD5.1ESB2
1N4002B
1SS133T-77
47
47
47
47
100k
1k
10k
0.01
1000
10V
470
16V
470
0.01
0.01
470
0.1
2SC4154-F
LED DRIVER
470
16V
470
16V
7P
0.1
SDPW50H0B0000-JP
SDPW50H0B0000-JP
SDPW50H0B0000-JP
SDPW50H0B0000-JP
0.2A
90V
2SB1689-T106
BRIGHT
CONTROL
10k
POWER
UNIT
D408-411
T401
AC IN
+B
LED+B
VT
ANT
L CONT
LIGHT3
GND
(LIGHT)
BOARD
MAIN
(1/2)
(Page12:US,CND,IT)
(Page14:AEP,UK)
ICF-C773/C773L
20
For schematic diagrams.
Note:
• All capacitors are in 
µF unless otherwise noted.  (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in 
Ω and 
1
/
4
 
W or less unless otherwise specified.
• A : B+ Line.
• H : adjustment for repair.
• Voltages are dc with respect to ground under no-signal conditions.
no mark : FM
(           ) : AM (MW)
<          > : LW
      *
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production toler-
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
• Abbreviation
CND : Canadian model.
IT
: Italian model.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each block.)
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
For printed wiring boards.
Note:
• X : parts extracted from the component side.
•
: Pattern from the side which enables seeing.
• Abbreviation
CND : Canadian model.
IT
: Italian model.
  (The other layers' patterns are not indicated.)
4-10. CIRCUIT BOARD LOCATION
KEY (R) board
KEY (L) board
KEY (MAIN) board
LCD board
MAIN board
POWER board
• WAVEFORMS
1.6 Vp-p
75 kHz
0.5V/DIV, 5 
µ
sec/DIV
1
 
IC101
 
wf
 XOUT
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