Philips-MCM-726-Service-Manual(1) 电路图 维修手册.pdf

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1、Version 1.0 MCM726 3141 785 31790 MP3 Micro Hi-Fi System all versions Published by LX 0717 Service Audio Subject to modification Copyright 2007 Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may be reproduced, stored in a retrieval syste

2、m or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Handling chip components . 1-1 Leadfree and safety information . 1-2 Technical specification . 2-1 Service tools . 2-1 Service measurement setup . 2-2 Connection

3、s and controls.3-1.3-2 Dismantling instructions .4-1.4-3 Block diagram. 5-1 Wiring diagram . 6-1 Main Board circuit diagram .7-1.7-2 layout diagram .7-3.7-4 C Music Board circuit diagram .8-1.8-2 layout diagram .8-3.8-4 VFD Board circuit diagram. . 9-1 layout diagram . 9-2 Cassette Board circuit dia

4、gram . 10-1 layout diagram . 10-2 Tuner Board circuit diagram. .11-1 layout diagram .11-2 Rectifier Board circuit diagram. . 12-1 layout diagram . 12-2 Exploded view diagram . 13-1 Mechanical partslist . 13-2 Electrical partslist .14-1.14-5 Supplier Bomlist TABLE OF CONTENTS RadioFans.CN 收音机爱 好者资料库

5、1 - 1 RadioFans.CN 收音机爱 好者资料库 1 - 2 RadioFans.CN 收音机爱 好者资料库 2 - 1 TECHNICAL SPECIFICATIONS 2 - 2 SERVICE MEASUREMENT Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT RF Generator e.g. PM5326 S/N and distortion meter e.g. Sound Technology ST1700B Tuner FW Use a bandpass filter to

6、 eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz). Ri=50 Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT S/N and distortion meter e.g. Sound Technology ST1700B Frame aerial e.g. 7122 707 89001 Tuner AM (MW,LW) To avoid atmospheric interference all A

7、M-measurements have to be carried out in a Faradays cage. Use a bandpass filter (or at least a high pass filter with 250kHz) to eliminate hum (50Hz, 100Hz). RF Generator e.g. PM5326 Ri=50 L R LEVEL METER e.g. Sennheiser UPM550 with FF-filter S/N and distortion meter e.g. Sound Technology ST1700B DUT

8、 CDRECORDER Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3) Use Universal Test Cassette Fe SBC420 4822 397 30071 L R LEVEL METER e.g. Sennheiser UPM550 with FF-filter S/N and distortion meter e.g. Sound Technology ST1700B DUT LF Generator e.g. PM5110 Ri=50 3 - 1 CONNECTION AND CON

9、TROLS 3 - 2 CONNECTION AND CONTROLS 5 - 15 - 1 SET BLOCK DIAGRAM 6 - 1 6 - 1 SET WIRING DIAGRAM 7 - 17 - 1 CIRCUIT DIAGRAM - MAIN BOARD PART 1 7 - 27 - 2 CIRCUIT DIAGRAM - MAIN BOARD PART 2 7 - 37 - 3 LAYOUT DIAGRAM - MAIN BOARD COMPONENT SIDE 7 - 47 - 4 LAYOUT DIAGRAM - MAIN BOARD COPPER SIDE 8 - 1

10、8 - 1 CIRCUIT DIAGRAM - C MUSIC BOARD PART 1 8 - 28 - 2 CIRCUIT DIAGRAM - C MUSIC BOARD PART 2 LAYOUT DIAGRAM - C MUSIC BOARD COMPONENT SIDE 8 - 38 - 3 LAYOUT DIAGRAM - C MUSIC BOARD COPPER SIDE 8 - 48 - 4 9 - 1 CIRCUIT DIAGARM - VFD BOARD 9 - 1 LAYOUT DIAGARM - VFD BOARD 9 - 29 - 2 10 - 110 - 1 CIR

11、CUIT DIAGRAM - CASSETTE BOARD 10 - 210 - 2 LAYOUT DIAGRAM - CASSETTE BOARD 2 1 3 4 COMPONENT SIDECOPPER SIDE 11 - 111 - 1 CIRCUIT DIAGRAM - TUNER BOARD MIXER varicap FM FRONTEND GND PRE- SCALER MULTI- PLEXER VSTABA AM-IF MONO/ XTAL AGC CONTROL OSC AM DET AM OSC AGC VCC2 AGC PUMP AM MIXER DECODER CHA

12、RGE FM IF1 FRONTEND AM VSTABB DET FM CONTROL FILTER AM IF AM DET STEREO STEREO FM IF2 RIPPLE AGC STABILIZER AFC VDD CTRL AGC A B C D E F G H I 234567891011121314 123456 31576120 MW=HIGH FM 75 OHM PROGRAMMABLE OUTPUT PORTS FM-IF2 LW VERSION DETECTION FM-IF1 7 I 7891011121314 A B C D E F G H from kHz

13、3170 BUFFER AMPLIFIER VCC 1 1 2 LEGEND * . only assembled in FM/AM-versionSMD jumper MW=HIGH BIRDY FILTER /00 /02 FM/MW /00 /02 FM/MW/LW 2169 / SYSTEMS-CENELEC STEREO 3 450kHz AM-IF2 3156 RIGHT MW LW only 450kHz DISCRIMINATOR AM-AFC AM-IF1 8 /01 FM/MW 6105 6 LW only LW =HIGH VERSION PROGRAMMING COMP

14、ONENTS marked components not for LW version MW/LW-RF VCO RDS only MPX to/from GND from 7101/39 LEFT /17 FM/AM to 1120 HN1V02H VERSION /14 FM-OIRT/MW 450kHz LW=HIGH TUNER BOARD ECO6 pin 5 54 LW . for LW version only MW ENABLE/MPX LW component mounted 7111 AM-OSCILLATOR CLOCK DATA AM FRAME AERIAL p .f

15、or provision only USA . for USA version only 2166 1n T117 4 IF-OUT 7 910 8 OSC. OUT V 5 VCC 6 150K 3169 1110FE450 ANT 1 23 T110 3168 T115 T109 3161 22K 120R 2130 22n 3142 100K 22u 2162 2137 220n 2123 390p 6 78 T106 T121 5103 1 2 3 4 T140 T118 T114 BC337-40 7105 T113 7124 100u 2129 68K 3151 BC847C 22

16、0p 2146 HN1V02H 6105-1 1 2 7 2K2 3128 2190 100n 0R 4102 * 3159 470R YKD31- 0432 1 2 470R 3160 2149 33p 1102 1103 XH-S 1 2 22 VCC2 9VCO 23 VDD 38 VSTABA VSTABB 34 29WRITE-EN 25 470n 2131 IF-GND 14 LEFT 12 LPF 24 11MPX-IN 13 MUTE 43 NC 30P0 31P1 16 PILOT 4RF-GND1 42 RF-GND2 15 RIGHT 1RIPPLE 7VCC1 40 A

17、M-MIXOUT 6AM-OSC 2AM-RF 39 AM|FM 27CLOCK 28DATA 26DIG-GND 21 FIELDSTR-IND 18 FM-DEMOD 3FM-GND 37 FM-IF1-IN 35 FM-IF2 33FM-IF2-IN 5FM-OSC 8I-TUNE 17 TEA5762 7101 10AF-OUT 20 AFC+ 19 AFC- 44 AGC 32AM-AFC 41 AM-IF1-IN 36 AM-IF2 2107 1u 56K 3141 BAS216 6106 22K 3134 7110 BC857B 6 7 8 2u2 2138 1120 FE-BT

18、-VK-N 1 2 3 4 5 1 2 34 6 78 5111 22K 3143 470R 3158 2143 220n T124 330R 3154 T123 T125 T111 3190 R021R021 3191 BAS216 6120 1K 3144 100K 3156 2144 1u 47K 3171 3194 2K2 2132 470n 1132 C-PAD 2118 2p2 220R 3105 2161 100n p 2141 100n T105 3157 100K 2119 10p 2K2 3145 2120 18p 22pLW 1 2 3 2124 10n * YKD21

19、1101USA T126 7122 BC847C 2109 10p T116 2 34 6 78 1u 2133 5114 7P 1 3 6 22K 3137 22R 3146 HN1V02H 6105-2 5 2122 3n3 2159 33p 10u 2128 10K 3150 47R 3132 BC857C 7103 3172 5K6 2167 12p DT-381 5121 75 T142 2147 220p T104 BC857B 7109 2K2 3108 4K7 3123 T122 T120 T127 7112 BC547C 2134 22nUSA 22nUSA C-PAD 11

20、31 T141 2106 11p 20p_LW 0R 4104* 0R 41xx 2165 100n 1130 C-PAD 10K 3180 2150 100n BZX284-C11 6107 T102 2127 220n 2169 2n2 100K 3170 1 I 3 O 2125 560p 5109 2 G 470R 3152 2108 100p 3125 10K 3153 470R 330R 3193 T103 120R 3167 100R 3195 78 33K 3176 8 5122 1 2 34 6 5123 1 2 34 6 7 5110 G2 I1O3 5115 123 46

21、 7 8 2 34 6 78 5119 1 2135 100n 2163LW 7104 BC337-40 2145 220p 150R 3155 220n 2136 6 78 T112 T107 * 5102 7KL 1 2 34 5 3109 4K7 4101 0R 7111 BC847C 1 2 34 6 78 330R 3192 2n2 2148 5112 7P 470n 2164 ECO6 Sys-Cenelec, 010517 2140 82p VCC1 VCC1 2139 15p MPX +FM P0 P1 VDD VDD VCC2 VCC2 VCC1 MPX P01 P1 P0

22、P01 P0 VDDVDD AM/FM +FM AM/FM P0 1101 A2 1102 B1 1103 E2 1110 B2 1120 E14 1130 A2 1131 C2 1132 F13 2102 B1 2105 A2 2106 E3 2107 E4 2108 G3 2109 G3 2118 H6 2119 H6 2120 H6 2122 I6 2123 H6 2124 H6 2125 H6 2127 E7 2128 B8 2129 C7 2130 F11 2131 F8 2132 F8 2133 F8 2134 I8 2135 I9 2136 H14 2137 H13 2138 F

23、9 2139 G9 2140 G9 2141 F10 2143 G12 2144 G11 2145 E11 2146 E12 2147 E12 2148 E12 2149 H7 2150 A10 2159 D5 2161 C11 2162 H12 2163 D11 2164 G10 2165 C7 2166 E11 2167 E11 2169 G8 2180 C4 2190 C3 2191 C3 3105 D5 3108 D2 3109 G4 3123 H3 3125 H2 3128 H3 3130 I9 3131 I9 3132 G4 3134 H6 3135 E7 3137 H7 3141

24、 E7 3142 E6 3143 G7 3144 G8 3145 F8 3146 G13 3150 H12 3151 H12 3152 G14 3153 G13 3154 F13 3155 G12 3156 C12 3157 D12 3158 E13 3159 D13 3160 D13 3161 D13 3167 F12 3168 F11 3169 E11 3170 D12 3171 G12 3172 G12 3176 H7 3180 I3 3190 B6 3191 B7 3192 B6 3193 B4 3194 C4 3195 C3 4101 E2 4102 F3 4104 H5 5102

25、E3 5103 F2 5109 B9 5110 B10 5111 A9 5112 A11 5114 B11 5115 E7 5118 G9 5119 G9 5121 E11 5122 H5 5123 G5 6105-1 E4 6105-2 G6 6106 D4 6107 G13 6120 C13 7101 C8 7103 H8 7104 D2 7105 F4 7109 H3 7110 H12 7111 C13 7112 G12 7122 H4 7124 H7 T102 B2 T103 B2 T104 B6 T105 E2 T106 E2 T107 C3 T109 D5 T110 D5 T111

26、 E5 T112 F7 T113 A9 T114 B11 T116 F10 T117 F13 T118 G11 T120 F13 T121 F13 T122 E13 T123 E13 T124 G14 T125 F14 T126 F13 T127 F13 T140 F11 T141 F10 T142 F10 p p p 2191 100u 2102 100n 2105USA 100n 5118 1nH 15n 15n 3131 820R 3130 820R 1K 3135 2180 10n 8.3V 7.5V 7.2V 9V 11V 8.2V 0.1V 1.2V 1.6-8V 5 1 A 3

27、2 D C 4 .V MW mode .VLW mode voltages measured while set is tuned to a strong transmitter 0.7V 0.7V 1.3V 0.7V 0V 7.4V 0V 7.5V 0.7V 0V mono 4.8V 0V 0V stereo 0.4V 7.5V 7.5V 1.4V 1.6-8V 0.1V 0V 0V 2V 0.2V 1.4V 1.4V 0.4V 0.7V 1.4V 1.4V 1.1V0.7V 1.4V 0.6V 0.6V 0.8V 0.15V .V FM mode stereo EVMV B 8V 6.7V

28、 8.3V 0.7V 0V 0V 0V 0.1V 0V 11V 2V 1.1V 1.1V 1V 1V 8.2V 7.8V 1.2V 0V 8.9V 12Vtyp 8.2V mono 4.8V stereo 0.2V 1.4V 0V 0V 0V 0V 0.1V 0V 0.7V 0.1V 0V 0.2V (10-14V) 9.6V 12V 8.9V 8.2V 7.5V 8.3V 8.2V 0.8V 1.2V 0.7V 1.3V 1V 8.2V 7.8V 1-8V 0V 5V 0V 152kHz, 50mVpp stereostereomono Signal path FM AF - left/ri

29、ght AM MPX (Audio Frequency) 11 - 211 - 2 LAYOUT DIAGRAM - TUNER BOARD 98MHz WaverangeInput frequencyInputTuned toAdjustOutputScope/Voltmeter VARICAP ALIGNMENT FM - VCO FM RF (channel separation) AM IF AM RF 3) 108MHz 87.5MHz check check 8V1.2V 1.6V0.5V 8V0.2V 6.9V0.2V 1.1V0.4V 152kHz1kHz 1) 98MHz31

30、42 198kHz3015zHk891 5111 FM 87.5 - 108MHz (50kHz grid) 1602kHz 531kHz 5123 check MW 531 - 1602kHz (9kHz grid) 8V0.2V 1.1V0.4V 279kHz 153kHz 5122 check LW 153 - 279kHz (3kHz grid) FM FM LW 558kHz558kHz 1494kHz 5102 6012zHk4941 MW MW 98MHz, 1mV continuous wave 98MHz, 1mV 90% Left + 9% pilot mod=1kHz I

31、F coil inside FM frontend 1110 1 3 5 5 A FM - IF 0mV3mV5119FM 10.7MHz, 45mV continuous wave 2D right channel min.4A 0mV2mV5114 2 C Repeat C 5112 1)If sensitivity of frequency counter is too low adjust to max. channel separation (input signal: stereo left 90% + 9%, adjust output on right channel to m

32、inimum) 2)RC network serves for damping the IF-filter while adjusting the other one. 3)For AM RF adjustments the original frame antenna has to be used! TUNER ADJUSTMENT TABLE( ECO6 Cenelec FM/MW - and FM/MW/LW - versions with AM-frame aerial ) max. symmetric fo max. symmetric fo ECO6 Sys Cenelec, 19

33、0599 B f = 30kHz VRF as low as possible MW has to be aligned before LW. 3-band 2-band Note: The FM-frontend unit has already been adjusted by the factory and needs therefore no further adjustments for service purposes. 2141 shortcircuit to block AFC 21 IC 7101 see remark2) 220R 100nF 36 IC 7101 220R

34、 100nF 40 IC 7101 450kHz connect pin 6 of IC 7101 (AM Osc.) with 3.3k to Vcc AM AFC MWcontinuous wave VRF = 2mV f = 10kHz VRF = 0.5mV (as low as possible) Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically. AM FRAME AERIAL FM 75 F

35、M FRONTEND Birdy Filter ECO6 Sys-Cenelec, layout stage .8, 200803 1101 B5 1102 B5 1103 C5 1110 B4 1120 A4 1130 A5 1131 C5 1132 A4 2106 B4 2107 B3 2128 A3 2129 B3 2133 C1 2138 B1 2144 B1 2162 A4 2191 B4 3142 C2 5102 C4 5103 C4 5109 B3 5110 A2 5111 A3 5112 A2 5114 A2 5115 C2 5119 B2 5121 B2 5122 C3 51

36、23 C3 7104 C4 7105 C5 7112 B1 9101 A2 9102 B2 9103 A1 9104 B1 9105 B1 9106 B1 9107 B4 9108 B3 9109 C2 9110 A4 9111 A3 TUNER BOARD ECO6 Systems - Cenelec / componentside view B A 12 - 112 - 1 CIRCUIT DIAGRAM - RECTIFIER BOARD 12 - 212 - 2 LAYOUT DIAGRAM - RECTIFIER BOARD 13 - 113 - 1 EXPLODED VIEW DI

37、AGRAM 13 - 2 MECHANICAL PARTSLIST 1996510002333TOP CABINET 3996510000871CD TRAY LOADER 4996510002348BRACKET CD DOOR 5996510002345CD DOOR 6996510002349CD TRAY 14996510002347BRACKET -TOP BUTTON 15996510002338POWER KEY 16996510002341TOP KEY CLUSTER BUTTONS 17996510002339MODE KEY CLUSTER BUTTONS 1899651

38、0002332FRONT CABINET 19996510002342POWER LENS 20996510002343DISPLAY LENS 21996510002337VOLUME KNOB 22996510002344CONTROL PANEL 25996510002346CASSETTE DOOR 26994000004801BRACKET - CASSETTE DOOR 27996510002331CASSETTE DOOR SPRING 30996510002340CD CONTROL KEY CLUSTER BUTTONS 34994000001434CASS DECK MEC

39、HANISM W991S 35994000001409CD DOOR GEAR HOLDER 36996510002350CASSETTE DOOR DAMPING GEAR 57994000003257DC BRUSHLESS FAN JD6025MS11150W0 63994000003234RUBBER FOOT 11x11x6mm 65996510002336REAR CABINET 75996510002334LEFT CABINET 78994000005773TRANSFORMER EI-76 230V 50HZ 84996510002335RIGHT CABINET 88996

40、510001074CD SPRING DIM:0.5MM 89996510001075CD SPRING DIM:0.6MM 89996510000868CD DAMPER PINK 658F HARDNESS 40JIS 90994000005786CD MECHANISM DA11VF (SANYO) 994000005777SWITCH SPRING FOR PUSH LOCK SUS304 ACCESSORIES SPEA996510002351WOODEN SPEAKER (LEFT+RIGHT) ONE SET RC996510002352REMOTE CONTROL FOR #M

41、CM726 ANT994000003268PIG TAIL ANTENNA WIRE BLACK AML994000001419AM LOOP FRAME ASSY INJ. BLACK ACL9940000014516 FEET VDE APPRROVED POWER CORD Note:Only these parts mentioned in the list are normal service parts. ! 14 - 1 ELECTRICAL PARTSLIST - MAIN BOARD - IC & TRANSISTORS - IC501994000003198IC HEF40

42、69UBT SOT108-1 SMT IC401994000003199I.C. HEF4094BT IC403994000003199I.C. HEF4094BT IC801996500039259I.C. PT4800(L) DIP-8 PIN IC402994000003201I.C. TC4052BF SWITCHING IC203996510002327I.C.KIA7806API-U/P TO-220IS IC201994000005724I.C. VOL. REGULATOR LD1117AL-3.3V-D IC701994000005726IC TDA7296 MULTIWAT

43、T15V IC702994000005726IC TDA7296 MULTIWATT15V Q203994000001436TRANSISTOR 2SB1566-F LEAD FREE Q208994000005727TRANSISTOR 2SB562C TO-92MOD Q408994000005729TRANSISTOR KTA1273 TO-92L Q402996500004928TRANSISTOR ON4986 (9340-447-50126) Q403996500004928TRANSISTOR ON4986 (9340-447-50126) Q404996500004928TRANSISTOR ON4986 (9340-447-50126) Q405996500004928TRANSISTOR ON4986 (9340-447-50126) - MISCELLANEOUS - 99651000232816P FFC CABLE 100MM P=1.0MM WHITE 9940000032596P FFC CABLE L=120MM 99400000576720 PINS FFC CABLE TYPE A 994000005768FFC CABLE 12PINS