Loewe-Centros2172-dvd-sm 电路图 维修手册.pdf

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1、SERVICEANLEITUNG DVD Recorder Service Manual. Manuel de Service. Manuale di Servizio. Instrucciones de servicio. Service-instructies. 230- 90434.936 CENTROS 2102 HD / CENTROS 2172 HD CENTROS 2102 Art.-Nr. 64502 CENTROS 2172 Art.-Nr. 64512 RadioFans.CN 收音机爱 好者资料库 CONTENTS SECTION 1 . . . . SUMMARY SE

2、CTION 2 . . . . CABINET ; NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock. A 5 4 3 2 1 BCD 2-3 2. DECK MECHANISM SECTION(MTK) 1001 A001 1025 1025 1030 1432 1029 1432 1021 1432 1432 1032 1033 1011 1019 1009 1020 1019 1012 1013 1

3、439 1014 1016 1015 1017 1018 1018A 1018B 1018E 1435 1018E 1018D 1006 1436 1024 1433 1029 1027 1027 1026 1003 1002 A004 A002 A000 A60 1437 1005 1434 1434 MAIN PCB 3-1 SECTION 3 ELECTRICAL CONTENTS VDR PART ELECTRICAL TROUBLESHOOTING GUIDE.3-2 BLOCK DIAGRAMS .3-18 1. POWER(SMPS) BLOCK DIAGRAM.3-18 2.

4、VIDEO BLOCK DIAGRAM_PAL .3-20 3. AUDIO BLOCK DIAGRAM PAL.3-22 CIRCUIT DIAGRAMS.3-24 1. POWER CIRCUIT DIAGRAM.3-24 2. I/O MICOM CIRCUIT DIAGRAM .3-26 3. TUNER/MPX/ADC/DAC/JACK CIRCUIT DIAGRAM.3-28 4. HDMI CIRCUIT DIAGRAM .3-30 5. MPEG CIRCUIT DIAGRAM.3-32 6. TIMER/KEY CIRCUIT DIAGRAM .3-34 7. FRONT A

5、V JACK CIRCUIT DIAGRAM.3-36 8. FRONT AV JACK_DV+SUPER CIRCUIT DIAGRAM.3-38 CIRCUIT VOLTAGE CHART .3-40 PRINTED CIRCUIT DIAGRAMS.3-44 1. MAIN P.C.BOARD(TOP SIDE) .3-44 2. MAIN P.C.BOARD(BOTTOM SIDE).3-46 3. JACK P.C.BOARD.3-48 4. FRONT P.C.BOARD .3-48 5. KEY TIMER P.C.BOARD .3-50 6. POWER P.C.BOARD.3

6、-50 MTK LOADER PART ELECTRICAL TROUBLESHOOTING GUIDE.3-52 BLOCK DIAGRAMS & DESCRIPTION.3-66 1. SERVO SYSTEM BLOCK DIAGRAM.3-66 2. MT1816 BLOCK DIAGRAM.3-67 3. MT1818 BLOCK DIAGRAM.3-68 CIRCUIT DIAGRAMS.3-69 1. RF CIRCUIT DIAGRAM .3-69 2. DSP CIRCUIT DIAGRAM .3-71 PRINTED CIRCUIT DIAGRAMS.3-73 1. MAI

7、N P.C.BOARD(TOP SIDE).3-73 3-2 ELECTRICAL TROUBLESHOOTING GUIDE VDR PART No 5.3VA Replace the F101 (Use the same Fuse) Is the F101 Normal? Is the R101 Normal? Is Vcc (9V - 18V) sup- plied to IC101 Pin7? IS the D123 normal? Is there about 2.5V at the IC103 Pin1? Is the BD101 Normal? NO NO NO NO NO Re

8、place the BD101 Replace the R101 Is the D102 normal? Check or Replace the D102 Replace the D123 NO Replace the IC103 YES YES YES YES Replace the D126 Is the D126 Normal? Power Line of Main PCB is short Is the D127 Normal? NO NO Replace the D127 YES YES YES NOYES YES Is the IC102 normal? NO Replace t

9、he IC102 YES Is the D124 Normal? NO Replace the D124 YES Is the D125 Normal? NO Replace the D125 YES YES 3-3 No 5VD Check or Replace the D123 Is the Vcc(3.3V) sup- plied to Q162 Emittor? Check or Replace the Q162 Is the Q162 Base H? NO NO Check the TIMER “H” signal from -com YES YES YES No 5VT Check

10、 or Replace the D123 Check the PWR CTL “H” signal from -com Is the Vcc(3.3V) sup- plied to Q164 Emittor? Is the Q164 Base H? Check or Replace the Q164 NO NO YES YES YES No 5.0VL Check or Replace the D123 Is the Vcc(5.3V) sup- plied to IC156 pin 1? Check or Replace the IC156 Is the IC156 pin4 H? NO N

11、O Check the TIMER “H” signal from -com YES YES YES No 5.0V_M Check or Replace the D123 Check the PWR CTL “H” signal from -com Is the Vcc(5.3V) sup- plied to IC156 pin 1? Is the IC156 pin4 H? Check or Replace the IC156 NO NO YES YES YES 3-4 No 12VL Check or Replace the D127 Is the Vcc(13.5V) sup- pli

12、ed to IC152 pin 1? Check or Replace the Q152 Is the IC152 pin4 H? NO NO Check the PWR CTL “H” signal from -com YES YES YES No 12VT(12VG) Check or Replace the D127 Check the GREEN “H” signal from -com Is the Vcc(13.5V) sup- plied to IC151 pin 1? Is the IC151 pin4 H? (Only 12VT) Check or Replace the I

13、C151 NO NO YES YES YES No 12V Check or Replace the D127 Is the Vcc(13.5V) sup- plied to IC157 pin 1? Check or Replace the IC157 Is the IC157 pin4 H? NO NO Check the PWR CTL “H” signal from -com YES YES YES No 3.3VL / 3.3V Check or Replace the D124, D125 Check the PWR CTL “H” signal from -com Is the

14、Vcc(3.8V) sup- plied to IC153 pin 1? Is the IC153 pin4 H? Check or Replace the IC153 NO NO YES YES YES 3-5 No 3.3V(HDMI) Check or Replace the D124, D125 Is the Vcc(3.8V) sup- plied to IC155 pin 1? Check or Replace the IC155 Is the IC155 pin4 H? NO NO Check the PWR CTL “H” signal from -com YES YES YE

15、S No 2.5V Check or Replace the D124, D125 Check the PWR CTL “H” signal from -com Is the Vcc(3.8V) sup- plied to IC154 pin 1? Is the IC154 pin4 H? Check or Replace the IC154 NO NO YES YES YES No 33V Replace the D126 Is the Vcc(33V) sup- plied to Q161Emittor? Is the Q161 Base H? Is the ZD126 Normal? N

16、O NO Replace the ZD126 NO Check the TIMER “H” signal from -com YES YES YES Check or Replace the Q161 YES No VF+ Replace the ZD121 Is the ZD121 Normal? Replace the R121 NO YES YES 3-6 IC504 12 JIGH? (RESET) Check IC504 power and other circuits X501 : Clock oscillated ? ( 27 MHz ) Replace X501 IC502-2

17、4 : Check signal(D_CS#) Check IC501 signal flow Check DRIVE power? 5V, 12V Check SMPS Check ATAPI Interface connector C514 LOEWE logo not displayed at POWER ON YES NO YES NO YES NO YES NO SYSTEM Section DISC not recognized Check IC504 power and other circuits 3-7 When playing DISC, no audio output I

18、C805 15, 18 Check audio output Check IC805 power and other circuits IC805 - 10 : HIGH ? (DAC RESET status) Check IC501 204 pin IC802 - 7, 8 : I2C signal normal? Check R910, R894 Check IC805 power and other circuits IC701 - 58: HIGH ? ( LOW: AUDIO MUTE ) Check IC701 power and other circuits No OPTICA

19、L / DIGITAL output IC501 216 pin signal normal? Check SMPS Check R933, R806 Check IC501 power and other circuits YES NO YES NO YES YES NO NONO NO 3-8 No TUNER audio output IC809, 810 Check audio signal output Check IC810,809 (AUDIO SWITCH) power and Switching operation Pin 2,4 High/Low =Pin 7 output

20、 : SW_A_OUT_L/R IC808, 809, 810 Check audio signal input Audio output even when playing DISC Check IC808 - 23,27 Check audio signal output Check IC810,809 signal flow and power IC804 - 32,33 Check I2C signal flow Q803 2(Emitter ) High ? IC804 9:LOW? HIGH: AUDIO MUTE IC804 - 32,33 Check signal flow I

21、C702 - 46 LOW:AUDIO MUTE IC808 20,24 Check audio signal input Check R861, R868, C845, C888 signal flow IC 812 - 30,31 : No audio signal output Check IC812 power and other circuits Check X801 oscillated YES NO YES NO YES YES YES NO NO NO YES NO YES NO NO 3-9 No TUNER VIDEO signal input When changing

22、a channel, IC701 - 8 :HIGH after RESET signal? Check TUNER power and other circuits Check IC701 power and other circuits IC812 - 2 : Check SIF signal input Check C920, TUNER signal flow Check C724 with IC703 circuit YES NO YES YES NO 3-10 No external input 1 audio IC809, 810 Check audio signal outpu

23、t IC810,809 (AUDIO SWITCH) Check power and switching operation Pin 2,4 High/Low =Pin 7 output : SW_A_OUT_L/R IC809, 810 Check audio signal input Audio output even when playing DISC Check IC808 - 23,27 Check audio signal output Check IC810,809 signal flow and power IC701 - 58 LOW:AUDIO MUTE IC804 - 1

24、0,16 Check audio signal input JK803 2 ,6 Check input END YES NO YES NO YES YES YES NO NO NO 3-11 No external input 2 audio IC809 8, 10 Check audio signal output IC810,809 (AUDIO SWITCH) Check power and switching operation Pin 2,4 High/Low =Pin 7 output : SW_A_OUT_L/R IC7809, 810 Check audio signal i

25、nput Audio output even when playing DISC Check IC808 - 23,27 Check audio signal output Check IC810,809 signal flow and power IC701 - 58 LOW:AUDIO MUTE IC808 - 8,14 Check audio signal input JK803 23,27 Check input END YES NO YES NO YES NO NO YES YES NO 3-12 No external input 3 audio END IC809, 810 Ch

26、eck audio signal output IC810,809 (AUDIO SWITCH) Check power and switching operation Pin 2,4 High =Pin 7 output : A1_L/R Pin 2,4 High/Low =Pin 7 output : TU_L/R IC809, 810 Check audio signal input Audio output even when playing DISC Check Check JK803, 804 YES NO YES NO YES NO 3-13 No external input

27、4 audio END IC809,810 Check audio signal output IC810,809 (AUDIO SWITCH) Check power and switching operation Pin 2,4 Low =Pin 7 output : A2_L/R Pin 2,4 High/Low =Pin 7 output : TU_L/R IC809 810 Check audio signal input Audio output even when playing DISC Check Front Jack JK803, Jk804 YES NO YES NO Y

28、ES NO 3-14 No RGB / Component video signal when playing DISC SW801 Q High? IC701 91 : HIGH ? Check other circuits around IC701 Q805 Collector High? Signal after checking R896, 831, 825, 878 and FFC CABLE? IC501, 200, 202, 203 /RST_VIDEO IC2075-8 Check X501 Check IC4009-31,32 signal and 5V power Chec

29、k IC70160 : High input IC806 16,18,20 R,G,B output? IC807 power and other circuits IC807 18, 21, 27 Pr,Pb,Y output? IC4003 41,42 Check I2C CLK, DATA YES NO YESYES NO YESYES NO YES YES NO NO NO NO 3-15 No COMPOSIT / S-VIDEO signal when playing DISC S-VIDEO: No Y signal? Check R896, C821 No COMPOSIT s

30、ignal?S-VIDEO : No C signal? IC807 - 6 Check output Check R830, C821 IC501 198 check /RST_VIDEO Check X501 Check R935 IC808 29,30 Check output Check R936 IC807 - 8 Check output IC807 - 4 Check output Check R871,C834 YES YES YES YES YES YES YES YES YES YES YES YES NO 3-16 No TV , external input video

31、 signal No video signal of external input 1/2 ( Rear Comosite input ) When connecting Tuner, no TV video signal No video signal of external input 3/4 ( Front S-VIEDO / Comosite input ) Check IC808 - 28 (input) and 31 (output) IC831, 7(output) IC501, 256 Check IC831, 6 Check X501, power Check Check T

32、uner power and other circuits IC501 246, 248 Check signal input Check IC808 - 1,3(input) and 31 (output). YES YES YES YES YES YES YES NO YES NO YES 3-17 No DV( IEEE 1394 ) input (video/audio) signal Check DV_JACK and CABLE connection IC507 - 27, 28, 29, 30 Check signal input IC507 -37 : HIGH? ( /RST

33、_PHY ) Check L509 Voltage Check IC507 - 2 Clock? BIO_PHY_CLK Check X503 Clock 24.576 MHz IC3048 = IC1099 Check BIO_PHY_DATA/CLK signal Check IC507 power and other circuits Check YES YES YES NO YES NO YES NO 3-183-19 BLOCK DIAGRAMS 1. POWER(SMPS) BLOCK DIAGRAM 33V RECTIFIERLINE FILTER SWITCHING IC TR

34、ANS FEED B. RECTIFIER(33VA) RECTIFIER(15V)LPF LPF AC100240V PWR CTL 12V RECTIFIER(5.3VA)LPF 5VT 5.3VA 5V_M REG(5V) REG(12V) REG(12V) 12VL 5VD RECTIFIER(4.3V)LPF REG(2.5V) TIMER H RECTIFIER(15V)LPFREG(12V) 12VG RECTIFIER(-28V) RECTIFIER(VF+)LPF LPF -26VA VF+ 5V_Loader REG(3.3V) REG(3.3V) 2.5V 2.5 VL

35、3.3V(HDMI) 3.3V 3.3VL GREEN H NOTES) Warning NOTES) Parts that are shaded are critical NOTES) With respect to risk of fire or NOTES) electricial shock. 3-203-21 2. VIDEO BLOCK DIAGRAM_PAL MM1623 VIDEO 6dB Amp. 75Driver MM1623 VIDEO 6dB Amp. Driver CVBS Y / C G (Y) B (Pb) R (Pr) TUNER TUNER V_MUTE_L

36、TUNER_VIDEO TSB41AB1 1394 PHY TSB41AB1 1394 PHY 24.576MHz PCNT1:0 DVCLK PD7:0 TPA+/- TPB+/- RF SIGNAL I/O MICOM I/O MICOM MM1443 AV S/W 4in/3out Canal Plus V1: Tu/E1/E2 Buffer V2: Tu/E1/Ext 6dB,Driver V3: E2/Ext 6dB,Driver SCART 1 SCART 1 EU1_V_IN EU1_V_OUT RGB_OUT R_SCART_OUT G_SCART_OUT B_SCART_OU

37、T SCART 2 SCART 2 EU2_V_IN EU2_V_OUT RGB_IN R_SCART_IN G_SCART_IN B_SCART_IN SDA5650 VPS/PDC SDA5650 VPS/PDC CVBS_OUT C_SEPA_OUT Pr_RCA_OUT Y_RCA_OUT Pb_RCA_OUT Y_SEPA_OUT CVBS_OUT RGB_CONT L H 10K SCART_H C+_DET_H I2C MM1510 SW_V_OUT F_V1_IN Y_IN C_IN I2C L H L H RGB_SEL_OUT CLP RGB_SEL RGB_CONT RGB_OUT RGB_IN RGB_SEL Tu V2 V3 V1 E2 E1 Ext FS TU_VIDEO TU_VIDEO 12K MT8105 MPEG Decoder Encoder 27MHz32.768Khz DDR 256Mb DDR 256Mb Flash 3