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Sony ICF-C273 - Fm/am Clock Radio, Service Manual

Introducing the Sony ICF-C273 - FM/AM Clock Radio, a versatile and reliable device designed to enhance your daily routine. With its sleek design and intuitive controls, this clock radio brings convenience to your bedroom. For easy setup and optimal usage, make sure to download the free Operating Instructions manual from manualshive.com.

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ICF-C273

21

R19

1-216-841-11 METAL CHIP

47K

5%

1/10W

R51

1-216-825-11 METAL CHIP

2.2K

5%

1/10W

R52

1-216-797-11 METAL CHIP

10

5%

1/10W

R53

1-216-837-11 METAL CHIP

22K

5%

1/10W

R54

1-216-833-11 METAL CHIP

10K

5%

1/10W

R55

1-216-833-11 METAL CHIP

10K

5%

1/10W

R56

1-216-813-11 METAL CHIP

220

5%

1/10W

R58

1-216-821-11 METAL CHIP

1K

5%

1/10W

R59

1-216-821-11 METAL CHIP

1K

5%

1/10W

R60

1-216-821-11 METAL CHIP

1K

5%

1/10W

R101

1-216-821-11 METAL CHIP

1K

5%

1/10W

R102

1-216-821-11 METAL CHIP

1K

5%

1/10W

R103

1-216-821-11 METAL CHIP

1K

5%

1/10W

R104

1-216-821-11 METAL CHIP

1K

5%

1/10W

R105

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R106

1-216-833-11 METAL CHIP

10K

5%

1/10W

R107

1-216-833-11 METAL CHIP

10K

5%

1/10W

R108

1-216-833-11 METAL CHIP

10K

5%

1/10W

R109

1-216-845-11 METAL CHIP

100K

5%

1/10W

R110

1-216-821-11 METAL CHIP

1K

5%

1/10W

R111

1-216-857-11 METAL CHIP

1M

5%

1/10W

R112

1-216-821-11 METAL CHIP

1K

5%

1/10W

R114

1-216-845-11 METAL CHIP

100K

5%

1/10W

R115

1-216-845-11 METAL CHIP

100K

5%

1/10W

R119

1-216-845-11 METAL CHIP

100K

5%

1/10W

R120

1-216-797-11 METAL CHIP

10

5%

1/10W

R121

1-216-797-11 METAL CHIP

10

5%

1/10W

R122

1-216-797-11 METAL CHIP

10

5%

1/10W

R123

1-216-797-11 METAL CHIP

10

5%

1/10W

R125

1-216-817-11 METAL CHIP

470

5%

1/10W

R126

1-216-813-11 METAL CHIP

220

5%

1/10W

R128

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R129

1-216-809-11 METAL CHIP

100

5%

1/10W

R130

1-216-805-11 METAL CHIP

47

5%

1/10W

R131

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R132

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R133

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R134

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R135

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R136

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R137

1-115-467-11 CERAMIC CHIP

0.22uF

10%

10V

R138

1-216-849-11 METAL CHIP

220K

5%

1/10W

R141

1-216-797-11 METAL CHIP

10

5%

1/10W

R142

1-216-825-11 METAL CHIP

2.2K

5%

1/10W

R144

1-216-821-11 METAL CHIP

1K

5%

1/10W

R145

1-216-825-11 METAL CHIP

2.2K

5%

1/10W

R146

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R147

1-216-817-11 METAL CHIP

470

5%

1/10W

R148

1-216-813-11 METAL CHIP

220

5%

1/10W

R149

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R150

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R151

1-216-797-11 METAL CHIP

10

5%

1/10W

R152

1-216-825-11 METAL CHIP

2.2K

5%

1/10W

R153

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R154

1-216-821-11 METAL CHIP

1K

5%

1/10W

R155

1-216-825-11 METAL CHIP

2.2K

5%

1/10W

R156

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R157

1-216-809-11 METAL CHIP

100

5%

1/10W

R159

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R160

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R161

1-216-833-11 METAL CHIP

10K

5%

1/10W

R162

1-216-833-11 METAL CHIP

10K

5%

1/10W

R163

1-216-833-11 METAL CHIP

10K

5%

1/10W

R164

1-216-833-11 METAL CHIP

10K

5%

1/10W

R165

1-216-833-11 METAL CHIP

10K

5%

1/10W

R166

1-216-833-11 METAL CHIP

10K

5%

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R167

1-216-833-11 METAL CHIP

10K

5%

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R168

1-216-833-11 METAL CHIP

10K

5%

1/10W

R169

1-216-833-11 METAL CHIP

10K

5%

1/10W

R170

1-216-833-11 METAL CHIP

10K

5%

1/10W

R171

1-216-833-11 METAL CHIP

10K

5%

1/10W

R172

1-216-833-11 METAL CHIP

10K

5%

1/10W

R173

1-216-833-11 METAL CHIP

10K

5%

1/10W

R174

1-216-833-11 METAL CHIP

10K

5%

1/10W

R175

1-216-833-11 METAL CHIP

10K

5%

1/10W

R176

1-216-833-11 METAL CHIP

10K

5%

1/10W

R177

1-216-833-11 METAL CHIP

10K

5%

1/10W

R178

1-216-833-11 METAL CHIP

10K

5%

1/10W

R179

1-216-833-11 METAL CHIP

10K

5%

1/10W

R180

1-216-833-11 METAL CHIP

10K

5%

1/10W

R181

1-216-833-11 METAL CHIP

10K

5%

1/10W

R182

1-216-833-11 METAL CHIP

10K

5%

1/10W

R183

1-216-833-11 METAL CHIP

10K

5%

1/10W

R184

1-216-833-11 METAL CHIP

10K

5%

1/10W

R185

1-216-833-11 METAL CHIP

10K

5%

1/10W

R186

1-216-833-11 METAL CHIP

10K

5%

1/10W

R187

1-216-833-11 METAL CHIP

10K

5%

1/10W

R188

1-216-833-11 METAL CHIP

10K

5%

1/10W

R189

1-216-833-11 METAL CHIP

10K

5%

1/10W

R190

1-216-833-11 METAL CHIP

10K

5%

1/10W

R191

1-216-833-11 METAL CHIP

10K

5%

1/10W

R192

1-216-833-11 METAL CHIP

10K

5%

1/10W

R201

1-216-817-11 METAL CHIP

470

5%

1/10W

R202

1-216-817-11 METAL CHIP

470

5%

1/10W

R203

1-216-829-11 METAL CHIP

4.7K

5%

1/10W

R211

1-216-837-11 METAL CHIP

22K

5%

1/10W

R213

1-216-845-11 METAL CHIP

100K

5%

1/10W

R214

1-216-845-11 METAL CHIP

100K

5%

1/10W

R215

1-216-845-11 METAL CHIP

100K

5%

1/10W

< VARIABLE RESISTOR >

RV1

1-227-482-11 RES, VAR, CARBON

50K (VOL

w

)

< TRANSFORMER >

T1

1-404-790-11 TRANSFORMER, IF (AM IF)

< ANTENNA WIRE >

W2

1-754-330-11 ANTENNA (WIRE)

< VIBRATOR >

X51

1-767-388-11 VIBRATOR, CRYSTAL (75kHz)

X101

1-760-252-12 VIBRATOR, CRYSTAL (32.768kHz)

X102

1-795-054-21 VIBRATOR, CERAMIC (4.192MHz)

************************************************************

*

1-861-132-11 SWITCH  BOARD

************

< RESISTOR >

R193

1-216-833-11 METAL CHIP

10K

5%

1/10W

R194

1-216-833-11 METAL CHIP

10K

5%

1/10W

R195

1-216-833-11 METAL CHIP

10K

5%

1/10W

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

MAIN

SWITCH

Summary of Contents for ICF-C273 - Fm/am Clock Radio

Page 1: ...Time display 12 hour Frequency range Band Channel step FM 87 5 108 MHz 0 05 MHz AM 531 1 602 kHz 9 kHz Speaker Approx 6 6 cm 2 5 8 in dia 8 Ω Power output 200 mW at 10 harmonic distortion Power requirements 230 V AC 50 Hz Dimensions Approx 173 x 57 2 x 133 5 mm w h d 6 7 8 x 2 3 8 x 5 3 8 in incl projecting parts and controls Mass Approx 630 g 1 lb 6 2 oz Design and specifications are subject to c...

Page 2: ...6 ELECTRICAL PARTS LIST 19 SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY HOW TO CHANGE THE CERAMIC FILTER This model is used two ceramic filters of C...

Page 3: ...FUNCTION OF CONTROLS This section is extracted from instruction manual AC power cord VOLUME There is a tactile dot beside volume to show the direction to turn up the volume Jog lever FM wire antenna The PRESET TUNING 3 button has a tactile dot ...

Page 4: ...ode See Presetting Your Favourite Station 3 Use TUNING or to tune into the desired station The FM channel step is set to 0 05 MHz and the AM MW channel step is set to 9 kHz The FM frequency display is raised or lowered by a step of 0 1 MHz For example frequency 88 00 and 88 05 MHz is displayed as 88 0 MHz Two short beeps sound when the minimum frequency of each band is received during tuning 4 Adj...

Page 5: ...he radio or buzzer turns off but will automatically come on again after about 10 minutes Every time you press SNOOZE DATE SLEEP OFF the snooze time changes as follows 10 t 20 t 30 t 40 t 10 t The display shows the snooze time for a few seconds and returns to show the current time When you press SNOOZE DATE SLEEP OFF after the current time appeared the snooze time starts from 10 minutes again The m...

Page 6: ...ng the following procedure 2 2 CABINET LOWER Page 6 2 3 ALARM BOARD JOG BOARD Page 7 SET 2 2 SWITCH BOARD CABINET UPPER Page 6 2 4 MAIN BOARD Page 7 2 5 TRANS BOARD Page 8 2 1 DISASSEMBLY FLOW qs cabinet upper qa SWITCH baord 9 three screws 0 Remove solder seven places 5 CN251 2 two screws B2 6 1 three screws B2 6 3 three craws 6 two craws 8 CN501 cabinet lower 4 7 ...

Page 7: ...D 4 two screws 3 cover jog 2 screw 8 JOG baord 7 screw 6 arm jog 5 ALARM board 1 two screws Cabinet upper 1 screw B2 6 2 power cord retainer board On assembling set antenna wire as shown in the figure antenna wire 4 CN201 7 MAIN board 3 screw 5 craw 6 ...

Page 8: ...ICF C273 8 2 5 TRANS BOARD 4 TRANS board 1 screw B2 6 2 power cord retainer board 3 ...

Page 9: ...el meter T1 450kHz AM FREQUENCY COVERAGE ADJUSTMENT Adjust part Frequency display L4 531kHz reading on digital voltmeter Adjustment value 2 7V Standaed value 2 5 to 2 9V AM TRACKING ADJUSTMENT Adjust for a maximum reading on level meter L 1 585kHz CT1 1 485kHz Frequency Coverage Adjustment Connect Location FM FREQUENCY COVERAGE CONFIRMATION Adjust part Frequency display Confirmation 87 5MHz 3 0 to...

Page 10: ...ICF C273 10 SECTION 4 DIAGRAMS Circuit Boards Location MAIN baord JOG baord ALARM baord TRANS baord SWITCH baord ...

Page 11: ...e noted due to normal produc tion tolerances Signal path F FM e AM 4 1 IC Block Diagrams IC1 CXA1019M IC51 LC7213M TLM E GND GND FM DISCRI NF VOL AM OSC AFC FM OSC REG OUT FM RF AM RF IN N C FM RF IN FE GND MIX OUT 21 22 23 24 25 26 27 28 29 30 2 3 5 4 6 7 8 9 10 1 11 12 13 14 15 16 17 18 19 20 AF POWER AMP AM IF DET AGC AM FE FM DISCRIMINATOR FM FE TUNING METER FM IF GND GND AF OUT Vcc RIPPLE FIL...

Page 12: ...CF1 CF2 MUTE Q4 FM IF DISCRI AF POWER AMP SPEAKER SP1 LED SWITCH Q102 103 LED SDRIVE Q108 LED DRIVE Q109 LED SWITCH Q104 107 AM IF DET FM AM FE OUT AM IF IN FM IF IN AF IN FM AM FRONT END IF AMP DET POWER AMP IC1 DET OUT AF OUT T201 POWER TRANSFORMER RECT D201 RECT D202 D51 46 1 2 VOLTAG DET IC103 1 5 18 17 5 15 7 AM FROT END 14 D108 4V D109 D110 D111 ALARM A ALARM A ALARM B 4V B LIGHT1 2 LIGHT1 2...

Page 13: ...115 C120 C121 C117 C122 C123 C118 C132 C134 C133 C101 C30 C103 C137 C135 C26 C23 C58 C56 C55 C61 C34 CN251 C60 C3 C4 C8 C5 C32 C13 C14 C17 R150 C131 C33 D105 D103 D102 D101 D104 D205 D203 D204 D51 D2 D111 X102 ALARM B D112 D109 D110 IC101 D108 E C B Q202 E C B Q201 D201 D52 D202 D53 D106 C110 C18 C19 C11 C12 C15 C10 C203 C206 C205 C57 C204 SP1 SPEAKER RED GRY RED GRY X51 IC1 CF1 T1 CF3 CF2 CT3 L2 ...

Page 14: ...N BAND S113 SNOOZE DATE SLEEP OGG S102 TUNING S101 TUNING S107 NAP RED BLK GRY W503 1 W503 2 S117 ENTER BRIGHTNESS S115 ALARM A S116 ALARM B R197 R196 R198 RED BLK GRY GRY BOARD ALARM 11 11 1 861 136 R199 R200 RED BLK GRY S119 TIME SET S118 TIME SET BOARD JOG 11 11 1 861 135 RED BLK GRY T201 POWER TRANSFORMER W201 P201 AC IN BOARD TRANS 11 11 1 861 131 A MAIN BOARD Page 13 B MAIN BOARD Page 13 2 3...

Page 15: ...KV1610STL1 2 UDZSTE 1713B 1SS133T 77 1SS133T 77 1SS355TE 17 1N4002B 1SS133T 77 UDZSTE 174 7B 100p 1000p 10p 0 01 3p 220p 220p 10p 0 1 0 022 10 50V 0 01 0 01 1 100p 0 01 4 7 50V 10 50V 0 022 0 22 10 50V 470 6 3V 220 10V 1 1 100k 4 7k 0 022 100k 10k 1000p 47 100 1k 100k 47k 2 2k 470 0 01 0 01 1000 10V 220 10V 470 6 3V 470 470 4 7k 220 25V 0 01 1k 1k 1k 220 0 22 220 10V 0 01 10k 10k 75kHz 0 01 50k 10...

Page 16: ...51S1E SLP 235A 51S1E SLP 235A 51S1E 0 01 0 01 0 01 0 01 10k 10k 10k 10k 10k 10k 10k 10k 10 10 470 220 4 7k 4 7k 4 7k 4 7k 4 7k 4 7k 100 47 470 220 0 01 0 01 4 7k 4 7k 0 1 0 1 100k 100k 1k 1k 1k 22p 22p 32 768kHz 220k 1 10 4 191MHz 10k 10k 0 01 0 01 1M 0 01 22k 100k 100k 100k 0 1 0 1 0 1 0 1 1000 6 3V 0 01 XC61CN2002NR 47p 100p 100p 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10k 10...

Page 17: ...ls are given in the last of this parts list Ref No Part No Description Remarks Ref No Part No Description Remarks 5 1 CABINET UPPER SECTION a a 1 1 2 7 7 7 3 4 5 6 5 12 8 10 11 SP1 9 1 3 254 141 01 SCREW B2 6 BV TAPPING 2 3 261 891 01 CHASSIS 3 1 861 132 11 SWITCH BOARD 4 3 252 827 01 SCREW B2 6 BV TAPPING 5 3 259 210 01 CUSHION H 6 X 2022 166 1 CABINET UPPER ASSY 7 3 254 070 01 SCREW 8 1 861 136 ...

Page 18: ...OARD 54 3 261 890 01 HOLDER LCD 55 3 254 070 01 SCREW 56 3 252 827 01 SCREW B2 6 BV TAPPING 57 3 261 892 01 HOLDER ANTENNA 58 3 382 175 21 KNOB V 59 A 4541 926 A MAIN BOARD COMPLETE L1 1 428 951 21 COIL FERRITE ROD ANTENNA MW LCD101 1 805 524 11 DISPLAY PANEL LIQUID CRYSTAL 0P201 1 790 431 21 POWER SUPPLY CORD 7 5A 250V 0T201 1 435 504 11 TRANSFORMER POWER W2 1 754 330 11 ANTENNA WIRE The componen...

Page 19: ...970 11 CERAMIC CHIP 0 01uF 10 25V C10 1 126 964 11 ELECT 10uF 20 50V C11 1 126 963 11 ELECT 4 7uF 20 50V C12 1 126 964 11 ELECT 10uF 20 50V C13 1 164 227 11 CERAMIC CHIP 0 022uF 10 25V C14 1 115 467 11 CERAMIC CHIP 0 22uF 10 10V C15 1 126 964 11 ELECT 10uF 20 50V C16 1 125 837 91 CERAMIC CHIP 1uF 10 6 3V C17 1 125 837 91 CERAMIC CHIP 1uF 10 6 3V C18 1 126 935 11 ELECT 470uF 20 16V C19 1 126 923 91...

Page 20: ... D111 6 500 920 01 DIODE SLP 235A 51S1E D112 6 500 920 01 DIODE SLP 235A 51S1E D201 8 719 063 79 DIODE 1N4002B D202 8 719 991 33 DIODE 1SS133T 77 D203 8 719 083 60 DIODE UDZSTE 174 7B D204 8 719 069 54 DIODE UDZSTE 175 1B D205 8 719 988 61 DIODE 1SS355TE 17 IC IC1 8 752 050 16 IC CXA1019M IC51 8 759 483 40 IC LC72137M TLM E IC101 6 803 950 01 IC uPD789477GC A41 8BT IC102 6 702 604 01 IC XC61CN2002...

Page 21: ...ETAL CHIP 4 7K 5 1 10W R154 1 216 821 11 METAL CHIP 1K 5 1 10W R155 1 216 825 11 METAL CHIP 2 2K 5 1 10W R156 1 216 829 11 METAL CHIP 4 7K 5 1 10W R157 1 216 809 11 METAL CHIP 100 5 1 10W R159 1 216 829 11 METAL CHIP 4 7K 5 1 10W R160 1 216 829 11 METAL CHIP 4 7K 5 1 10W R161 1 216 833 11 METAL CHIP 10K 5 1 10W R162 1 216 833 11 METAL CHIP 10K 5 1 10W R163 1 216 833 11 METAL CHIP 10K 5 1 10W R164 ...

Page 22: ...SNOOZE DATE SLEEP OFF S114 1 554 937 11 SWITCH TACTILE D S Y SUMMER T FLAT CABLE W500 1 829 132 11 CABLE FLEXIBLE FLAT 9 CORE 1 861 131 11 TRANS BOARD POWER CORD 0P201 1 790 431 21 POWER SUPPLY CORD 7 5A 250V TRANSFORMER 0T201 1 435 504 11 TRANSFORMER POWER TERMINAL TML201 1 535 771 31 TERMINAL TML202 1 535 771 31 TERMINAL MISCELLANEOUS LCD101 1 805 524 11 DISPLAY PANEL LIQUID CRYSTAL L1 1 428 951...

Page 23: ...ICF C273 23 MEMO ...

Page 24: ...TORY Clicking the version allows you to jump to the revised page Also clicking the version at the upper right on the revised page allows you to jump to the next revised page Ver Date Description of Revision 1 0 2004 03 New ...

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