Sony TA-F448EB Service Manual Download Page 8 | Manualshive

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• IC Block Diagram

IC401

µPC1237HA

SECTION 4

DIAGRAMS

1

2

3

4

5

6

7

8

OVER LOAD DET

F/F

OFFSET DET

LATCH/

AUTORESET

V

CC

ON

MUTE

AC OFF

DET

V

CC

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...
6
7
8
9
10
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»

Summary of Contents for TA-F448EB

Page 1: ... A PHONO 94 dB TUNER CD AUX TAPE1 DAT TAPE2 MD 105 dB Output voltage impedance RECOUT 150 mV 1 kilohm PHONES 10 mW at 8 ohms Speakers impedance 4 16 ohms 8 16 ohms SPEAKERS A B Damping factor 100 8 ohms 1 kHz General System Power amplifier Pure complementary SEPP OCL power amplifier with all stages directly coupled Preamplifier Low noise equalizer amplifier Power requirements 230 V AC 50 60 Hz Pow...

Page 2: ...E CRITICAL TO SAFE OPERATION REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB LISHED BY SONY TABLE OF CONTENTS 1 GENERAL 3 2 DISASSEMBLY 5 3 ELECTRICAL ADJUSTMENTS 7 4 DIAGRAMS 8 4 1 Printed Wiring Boards 10 4 2 Schematic Diagram 15 5 EXPLODED VIEWS 19 6 ELECTRICAL PARTS LIST 22 ...

Page 3: ... 3 SECTION 1 GENERAL This section is extracted from instruction manual ...

Page 4: ... 4 ...

Page 5: ...NT PANEL SECTION 1 two screws case 3 TP2 2 three screws case 3 TP2 3 two screws case 3 TP2 3 two screws case 3 TP2 4 case ass y 1 connector CN201 2 connector CN701 3 connector CN405 4 connector CN809 5 connector CN104 6 five screws 3 8 7 two screws 3 8 8 screw BVTP2 6 8 8 screw BVTP3 8 9 front panel section ...

Page 6: ...wo connectors CN16 103 four screws H 6 two connectors CN401 402 º screw 3 8 8 connector CN405 7 two connectors CN403A 404A 9 Break the soldering of three power transformer leads º three screws 3 8 heat sink two screws transistor MAIN B board A heat sink two screws transistor four screws H MAIN A BOARD 1 connector CN201 2 five screws 3 MAIN A board ...

Page 7: ...p to the rated voltage 230 V AC 5 At this time confirm that the speaker relay is turned on it will click 6 Adjust the RV301 L CH and RV351 R CH so that a reading of digital voltmeter is from 10 mV to 20 mV 7 Return the slidack to 0 V AC and press the POWER button OFF on the set pin 1 pin 3 CN406 L CH CN407 R CH Connection and Adjustment Location MAIN A BOARD Component side MAIN B BOARD Component s...

Page 8: ... 8 IC Block Diagram IC401 µPC1237HA SECTION 4 DIAGRAMS 1 2 3 4 5 6 7 8 OVER LOAD DET F F OFFSET DET LATCH AUTORESET VCC ON MUTE AC OFF DET VCC ...

Page 9: ... 9 Circuit Boards Location MAIN B board SP TM board INPUT board MAIN A board VOL board LED F board SW F board SP SW board HP board LED P board ...

Page 10: ......

Page 11: ......

Page 12: ...they may have some difference from the original one Color Indication of Appearance Parts Example KNOB BALANCE WHITE RED Parts Color Cabinet s Color Ref No Part No Description Remark Ref No Part No Description Remark 1 4 967 961 01 SCREW 3X8 2 X 4947 025 1 FOOT ASSY 3 7 685 872 09 SCREW BVTT 3X8 S 4 4 951 620 01 SCREW 2 6X8 BVTP 5 3 363 099 61 SCREW CASE 3 TP2 6 X 4948 403 1 CASE ASSY 1 1 1 1 2 2 1...

Page 13: ...SW BOARD 66 1 662 193 11 SW F BOARD 67 1 662 194 11 LED F BOARD 68 1 662 192 11 VOL BOARD 69 3 703 466 00 SPRING 6600 S1 1 554 920 11 SWITCH PUSH AC POWER 1 KEY POWER 51 4 980 767 12 PANEL FRONT 52 4 965 651 01 EMBLEM MOS 53 4 979 587 01 EMBLEM NO 5 SONY 54 X 4946 920 1 KNOB VOL ASSY 55 4 980 771 01 KNOB DIA 47 56 4 980 775 01 LENS LED 57 4 980 774 11 KNOB F11 58 4 980 774 01 KNOB F11 59 X 4946 94...

Page 14: ...ORT PLUG 111 4 947 010 01 SCREW FEEDER FIXED 112 4 982 978 21 PANEL BACK AEP 112 4 982 978 31 PANEL BACK UK 113 1 662 191 11 INPUT BOARD 114 A 4398 159 A MAIN A BOARD COMPLETE CNP801 1 777 185 11 CORD POWER T1 1 431 295 11 TRANSFORMER POWER 103 104 101 105 104 101 106 101 101 107 108 101 110 111 101 112 101 114 101 101 113 102 102 101 not supplied not supplied not supplied not supplied not supplie...

Page 15: ...63 DIODE 1N4148M D108 8 719 987 63 DIODE 1N4148M PIN JACK J101 1 568 978 51 JACK 6P PHONO TUNER CD INPUT J102 1 568 978 11 JACK 6P AUX INPUT TAPE2 MD IN RECOUT J103 1 573 142 21 JACK PIN 4P TAPE1 DAT IN RECOUT TRANSISTOR Q101 8 729 119 78 TRANSISTOR 2SC2785 HFE Q102 8 729 119 78 TRANSISTOR 2SC2785 HFE Q103 8 729 119 78 TRANSISTOR 2SC2785 HFE Q104 8 729 119 78 TRANSISTOR 2SC2785 HFE Q105 8 729 119 ...

Page 16: ... 102 230 00 CERAMIC 4PF 0 25PF 500V C366 1 126 023 11 ELECT 100uF 20 16V C367 1 126 023 11 ELECT 100uF 20 16V C368 1 126 023 11 ELECT 100uF 20 16V C369 1 126 023 11 ELECT 100uF 20 16V C370 1 110 393 11 ELECT 100uF 20 63V C371 1 113 496 11 POLYSTYRENE 4PF 10 50V C372 1 109 871 11 ELECT 2700uF 20 50V CONNECTOR CN301 1 691 767 11 PLUG MICRO CONNECTOR 5P CN302 1 691 765 11 PLUG MICRO CONNECTOR 3P DIOD...

Page 17: ...360 1 259 320 11 CARBON 4 7K 1 1 2W R361 1 259 167 21 CARBON 1K 5 1 4W R363 1 249 943 11 CARBON 6 8K 5 1 4W R364 1 249 198 11 CARBON 330 5 1 3W R365 1 249 198 11 CARBON 330 5 1 3W R366 1 249 198 11 CARBON 330 5 1 3W R367 1 249 198 11 CARBON 330 5 1 3W R368 1 259 167 21 CARBON 1K 5 1 4W R369 1 259 151 21 CARBON 220 5 1 4W R370 1 259 151 21 CARBON 220 5 1 4W R371 1 259 151 21 CARBON 220 5 1 4W R372 ...

Page 18: ... 11 CARBON 330 5 1 2W R702 1 260 093 11 CARBON 330 5 1 2W R703 1 260 103 11 CARBON 2 2K 5 1 2W C452 1 136 163 00 FILM 0 068uF 5 50V C453 1 109 871 11 ELECT 2700uF 20 50V C454 1 124 920 11 ELECT 330uF 20 50V C459 1 109 870 11 ELECT 8200uF 20 50V C465 1 126 025 11 ELECT 330uF 20 25V C469 1 164 077 11 CERAMIC 220PF 10 50V CONNECTOR CN401 1 691 768 11 PLUG MICRO CONNECTOR 6P CN402 1 691 766 11 PLUG MI...

Page 19: ...L BOARD SPEAKER 8P BI WIRE SPEAKERS SYSTEM 1 662 193 11 SW F BOARD CAPACITOR C601 1 136 165 00 FILM 0 1uF 5 50V C602 1 136 165 00 FILM 0 1uF 5 50V C603 1 126 926 11 ELECT 1000uF 20 10V CONNECTOR CN601 1 691 773 11 PLUG MICRO CONNECTOR 11P CNP601 1 774 936 11 CONNECTOR BOARD TO BOARD 12P TRANSISTOR Q601 8 729 119 78 TRANSISTOR 2SC403SP 51 Q602 8 729 900 74 TRANSISTOR DTC143TS Q603 8 729 119 78 TRAN...

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