Sony ICF-C255RC - Auto Time Set Clock Radio Service Manual Download Page 8

ICF-C255RC

— 9 —

— 10 —

4-1.

PRINTED  WIRING  BOARDS

Note on Printed Wiring Boards:

X

: parts extracted from the component side.

b

: Pattern from the side which enables seeing.

Ref. No.

Location

D1

D-9

D5

E-8

D6

E-7

D7

E-6

D8

E-5

D9

E-3

D10

E-3

D100

D-5

D101

D-5

D151

D-4

D152

D-4

D153

D-4

D154

C-4

D155

C-4

D156

IC1

C-8

IC100

E-6

Q1

D-9

Q2

C-7

Q3

B-8

Q4

B-8

Q5

D-8

Q6

E-9

Q7

D-6

Q8

D-6

Q9

E-4

Q10

E-4

Q100

E-5

Q101

E-5

Q151

C-6

• Semiconductor

Location

SECTION  4

DIAGRAMS

KEY BOARD

POWER BOARD

LED BOARD

MAIN BOARD

1-676
-852-

1-676-851-

11

(11)

11

(11)

1-676-850-

11

(11)

1-676-849-

12

(12)

1-674-952-

11

(11)

C30

C9

C19

C24

C10

C16

R16

JC13

R1

R2

C2

C26

C117

R18

R28

R27

JC11

Q4

C25

C108

C156

C157

C158

E

E

E

E

CF1

CF2

CF3

X100

15

28

1

14

1

1

1

5

4

1

8

4

1

3

2

FERRITE-ROD ANTENNA BOARD

FERRITE

ROD

ANTENNA

BPF1

VR1

FM

ANTENNA

VOL

CT1

CT3

CT4

CT2

C8

T1

L3

L1

L4

AM FERRITE-ROD

ANTENNA

K

E

D5

D100

D155

D154

D152

D153

D101

D151

D6

D7

D8

D9

D10

Q151

W200

W151

E

E

E

E

1

14

15

28

29

42

43

56

LCD100 (LIQUID CRYSTAL DISPLAY)

E

CN150

1

3

CN2

1

3

W2

1

4

W150

CN201

E

E

HI

LOW

S1 BRIGHTNESS

H

L

1

8

CN200

B

A

ALARM

MODE

T150

POWER

TRANSFORMER

 P150
AC IN

S213

CLOCK

S210

DST

S209

M5

S208

M4

S204

ON

S202

OFF

S207

M3

S206

M2

S205

M1

S200

S201

S203

BAND

S211

SNOOZE

S212

A-RESET

S214

S215

SP1

(SPEAKER)

1

2

A

B

C

D

E

F

G

3

4

5

6

7

8

9

10

TO

ALARM

DIAL

16

TIME

TIME

TUNING

D5-D8

BACK LIGHT

JC153

JC119

JC120

JC158

JC144

JC143

JC159

JC160

C120

C120

JC155

JC154

JC156

JC157

R123

R151

C159

R26

R25

R153

R22

R21

R120

R101

R17

CN202

Q1

D1

Q5

JC112

JC161

C459

R456

L451

JC162

JC102

X451

4

2

1

3

20

11

10

1

R459

C460

C456

C457

R458

R460

R461

C451

C454

C455

IC451

R453

PS150

Summary of Contents for ICF-C255RC - Auto Time Set Clock Radio

Page 1: ...ICF C255RC AEP Model SERVICE MANUAL FM MW LW RADIO CONTROLLED CLOCK RADIO SPECIFICATIONS Ver 1 0 2000 05 ...

Page 2: ...omer and recommend their replacement 4 Look for parts which through functioning show obvious signs of deterioration Point them out to the customer and recommend their replacement 5 Check the B voltage to see it is at the values specified 6 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C during repairing Do not touch the soldering iron on the same conductor ...

Page 3: ... 3 ...

Page 4: ...edure Key board Ferrite rod antenna board Cabinet upper Set Main board Power board 2 1 CABINET UPPER S 4 Cabinet upper 6 Speaker 2 Two claws 7 Box assy ANT connector 8 Box assy ANT 5 Remove the two solderings 3 1 Five screws M3 14 Precaution when attaching the cabinet upper Align the button alarm with knob of the dial alarm assembly to attach it ...

Page 5: ...claws 5 Two claws 2 Two claws 6 Chassis 4 Key board 3 Connector CN200 7 Cabinet lower 2 3 MAIN BOARD 8 Main board 6 LED board 3 Alarm dial board 4 Claw 7 Connector CN150 5 Connector CN2 1 Connector CN201 2 Two screws BTP 2 8 ...

Page 6: ... power 1 2 5 FERRITE ROD ANTENNA BOARD S Set the Antenna cord as illustrated below then install the antenna box upper 4 Box upper antenna 2 Two claws Box upper antenna Box upper antenna 3 Box lower antenna 5 Ferrite rod antenna board Ferrite rod antenna board Antenna cord 1 Three screws B1 7 8 Antenna cord setting BOX ASSY ANT ...

Page 7: ...z LW TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L4 2 CT2 162 kHz 243 kHz Adjusting Location MAIN board Component Side 7 8 T1 AM IF adjustment FM TRACKING adjustment L1 MW FREQUENCY COVERAGE adjustment CT1 MW TARCKING adjustment CT3 L3 L4 2 LW TRACKING adjustment L4 1 MW TRACKING adjustment CT2 LW TARCKING adjustment CT4 LW FREQUENCY COVERAGE adjustment 2 6 POWER CORD AND ANTEN...

Page 8: ... 1 5 4 1 8 4 1 3 2 FERRITE ROD ANTENNA BOARD FERRITE ROD ANTENNA BPF1 VR1 FM ANTENNA VOL CT1 CT3 CT4 CT2 C8 T1 L3 L1 L4 AM FERRITE ROD ANTENNA K E D5 D100 D155 D154 D152 D153 D101 D151 D6 D7 D8 D9 D10 Q151 W200 W151 E E E E 1 14 15 28 29 42 43 56 LCD100 LIQUID CRYSTAL DISPLAY E CN150 1 3 CN2 1 3 W2 1 4 W150 CN201 E E HI LOW S1 BRIGHTNESS H L 1 8 CN200 B A ALARM MODE T150 POWER TRANSFORMER P150 AC ...

Page 9: ...l designation U B Line H adjustment for repair Voltages are dc with respect to ground under no signal detuned conditions no mark FM MW LW Impossible to measure Voltages are taken with aVOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Signal path F FM f MW LW The components identified by mark 0 or dotted line with mark 0 are critical for safety Replace ...

Page 10: ......

Page 11: ......

Page 12: ...BOARD CONNECTOR CN200 1 580 187 11 SOCKET CONNECTOR 8P JUMPER JC200 1 216 296 91 SHORT 0 SWITCH S200 1 692 014 11 SWITCH KEY BOARD S201 1 692 014 11 SWITCH KEY BOARD S202 1 692 014 11 SWITCH KEY BOARD OFF S203 1 692 014 11 SWITCH KEY BOARD BAND S204 1 692 014 11 SWITCH KEY BOARD ON S205 1 692 014 11 SWITCH KEY BOARD M1 S206 1 692 014 11 SWITCH KEY BOARD M2 S207 1 692 014 11 SWITCH KEY BOARD M3 S20...

Page 13: ...1uF 10 00 50V C155 1 163 021 91 CERAMIC CHIP 0 01uF 10 00 50V C156 1 126 927 11 ELECT 2200uF 20 00 10V C157 1 104 666 11 ELECT 220uF 20 00 25V C158 1 126 934 11 ELECT 220uF 20 00 10V C159 1 163 009 11 CERAMIC CHIP 0 001uF 10 50V FILTER CF1 1 578 677 21 FILTER CRYSTAL 450kHz CF2 1 579 632 41 FILTER CERAMIC 10 7MHz CF3 1 579 632 41 FILTER CERAMIC 10 7MHz CONNECTOR CN2 1 568 269 11 SOCKET CONNECTOR 3...

Page 14: ...STOR R1 1 216 133 00 METAL CHIP 3 3M 5 1 10W R2 1 216 073 00 METAL CHIP 10K 5 1 10W R3 1 216 097 91 RES CHIP 100K 5 1 10W R5 1 216 049 91 RES CHIP 1K 5 1 10W R6 1 216 057 00 METAL CHIP 2 2K 5 1 10W R7 1 216 037 00 METAL CHIP 330 5 1 10W R9 1 216 097 91 RES CHIP 100K 5 1 10W R10 1 216 089 91 RES CHIP 47K 5 1 10W R11 1 216 073 00 METAL CHIP 10K 5 1 10W R12 1 216 037 00 METAL CHIP 330 5 1 10W R13 1 2...

Page 15: ... 1 767 517 11 VIBRATOR CRYSTAL 75kHz 1 676 851 11 POWER BOARD 1 535 771 11 TERMINAL TRANSFORMER 0T150 1 435 504 11 TRANSFORMER POWER MISCELLANEOUS 18 1 553 856 00 SWITCH KEYBOARD 20 1 535 771 11 TERMINAL 25 1 674 952 11 FERRITE ROD ANTENNA BOARD SP1 1 504 748 21 SPEAKER 6 6cm 0P150 1 555 795 00 CORD POWER ACCESSORIES PACKING MATERIALS 3 046 171 11 MANUAL INSTRUCTION ENGLISH FRENCH GERMAN DUTCH The...

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