Cambridge-L937CT-int-sch维修电路图 手册.pdf

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1、1234 A B C D 4321 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE J:Change_ControlECO_WIP03_E291 Transistor obsolete P7 A32 A90 C30 - MJTL937AY - A32 A90 preamp boardL937_1.2.ddb - DocumentsSchematicL937C1_1.2.PRJ A & R Cambridge Ltd. Pembroke Avenu

2、e Denny Industrial Centre Waterbeach Cambridge CB5 9PB Integrated amplifier preamp Circuit Diagram L937C1 JBR9-Oct-2003 INITIALS Date Printed 13Sheetof Notes: Main signal path L937C2_1.2.SCH Power supply L937C3_1.2.SCH PCB PCB1 L937PB_1 01_1142JBR14/8/01First production release1.0 01_E014JBR28/11/01

3、Fuses uprated to 2A1.1 15mm x 6mm x 3mm DAMPING PAD E802AP ITEM1 15X6X3_DAMPING_PAD 03_E291MJT07/10/03 None to this sheet. Transistors Q301(4B5248) & Q305(4B1964) obsolete. 1.2 Replace with 4B5171 & 4B1930. Replaced 470p caps 2D147W with 2DA147 Contact Tel: 01223 203200 Contact Engineer: Mark Tweeda

4、le RadioFans.CN 12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE J:Change_ControlECO_WIP03_E291 Transistor obsolete P7 A32 A90 C30 - MJTL937AY - A32 A90 preamp boardL937_1.2.ddb - DocumentsSchematicL937C2_1.2.SCH A & R Cambr

5、idge Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9PB Integrated amplifier preamp - main signal path Circuit Diagram L937C2 JBR 9-Oct-2003 INITIALS Date Printed 23Sheetof Notes: EMC 1 N F SK2A PHONO4G C100 1N0 SM 0V_SIG 0V_SIG R100 1K0 SM R101 1K0 SM R103 100K SM R104 100K S

6、M D100 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D101 BAV99W DUAL SM +15V-15V N F SK2B PHONO4G 0V_SIG R102 1K0 SM R125 1K0 SM R105 100K SM R128 100K SM D102 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D106 BAV99W DUAL SM +15V-15V EMC 1 N F SK3A PHONO4G C121 1N0 SM 0V_SIG 0V_SIG R126 1K0 SM R127 1K0 SM R129 10

7、0K SM R130 100K SM D107 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D108 BAV99W DUAL SM +15V-15V N F SK3B PHONO4G 0V_SIG R156 1K0 SM R157 1K0 SM R159 100K SM R160 100K SM D112 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D113 BAV99W DUAL SM +15V-15V EMC 1 N F SK4A PHONO4G C139 1N0 SM 0V_SIG 0V_SIG R158 1K0 SM R1

8、89 1K0 SM R161 100K SM R192 100K SM D114 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D115 BAV99W DUAL SM +15V-15V EMC 1 N F SK5A PHONO4G 0V_SIG R190 1K0 SM R191 1K0 SM R193 100K SM R194 100K SM D116 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D117 BAV99W DUAL SM +15V-15V CD INPUT TUNER INPUT AV INPUT DVD INPUT

9、TAPE INPUT VCR INPUT C160 1N0 SM 0V_SIG C164 1N0 SM 0V_SIG 0V_SIG R195 1K0 SM R196 1K0 SM R197 100K SM R198 100K SM D118 BAV99W DUAL SM +15V-15V 0V_SIG 0V_SIG D119 BAV99W DUAL SM +15V-15V EMC 1 N F SK6 PHONO2G AUX INPUT CD L CD R TUNER L TUNER R AV L AV R DVD L DVD R TAPE IN L TAPE IN R VCR IN L VCR

10、 IN R AUX L AUX R AUX L CD L TUNER L AV L DVD L VCR IN L MODULE L 0V_SIG AUX R CD R TUNER R AV R DVD R VCR IN R MODULE R 0V_SIG TAPE 0 TAPE 1 TAPE 2 TAPE 0 TAPE 1 TAPE 2 +15V +15V-15V -15V 0V_SIG 0V_SIG C104 100N SM C105 100N SM +15V -15V 3 2 1 Z109A TL072 SM 84 Z113C TL072 SM R106 1M0 SM 0V_SIG R10

11、8 47R SM D103 BAV99W DUAL SM +15V-15V N F SK4B PHONO4G 0V_SIG 5 6 7 Z109B TL072 SM R107 1M0 SM 0V_SIG R109 47R SM D104 BAV99W DUAL SM +15V-15V 3 2 1 Z110A TL072 SM R131 1M0 SM 0V_SIG R133 47R SM D109 BAV99W DUAL SM +15V-15V 5 6 7 Z110B TL072 SM R132 1M0 SM 0V_SIG R134 47R SM D110 BAV99W DUAL SM +15V

12、-15V N F SK5B PHONO4G 0V_SIG +15V +15V-15V -15V -15V -15V C108 100P SM C109 100P SM C129 100P SM C130 100P SM AUX L CD L TUNER L AV L DVD L TAPE IN L MODULE L 0V_SIG AUX R CD R TUNER R AV R DVD R TAPE IN R MODULE R VCR 0 VCR 1 VCR 2 VCR 0 VCR 1 VCR 2 0V_SIG 0V_SIG 0V_SIG TAPE OUTPUT VCR OUTPUT C106

13、100N SM C107 100N SM +15V -15V 0V_SIG C125 100N SM C126 100N SM +15V -15V 0V_SIG C127 100N SM C128 100N SM +15V -15V 0V_SIG AUX L CD L TUNER L AV L DVD L TAPE IN L VCR IN L MODULE L AUX R CD R TUNER R AV R DVD R TAPE IN R VCR IN R MODULE R LISTEN 0 LISTEN 1 LISTEN 2 LISTEN 0 LISTEN 1 LISTEN 2 0V_SIG

14、 0V_SIG C143 100N SM C144 100N SM +15V -15V 0V_SIG C145 100N SM C146 100N SM +15V -15V 0V_SIG 84 Z114C TL072 SM R170 22K SM R162 22K SM R171 22K SM R163 22K SM R172 22K SM R164 22K SM R173 22K SM R165 22K SM R174 22K SM R166 22K SM R175 22K SM R167 22K SM R176 22K SM R168 22K SM R177 22K SM R169 22K

15、 SM +15V +15V R178 22K SM C148 22P SM R179 22K SM C149 22P SM 5 6 7 Z115B OPA2134PA SM 5 6 7 Z116B OPA2134PA SM 84 Z116C OPA2134PA SM 0V_SIG 0V_SIG R183 1M0 SM R184 1M0 SM R199 100K SM R180 100K SM 0V_SIG 0V_SIG +5V +5V +5V +5V +5V +5V X0 4 X1 5 X2 6 X3 7 X4 12 X5 11 X6 10 X7 9 EN 2 A0 1 A1 16 A2 15

16、 V- 3 D 8 GND 14 V+ 13 Z100 DG408DY X0 4 X1 5 X2 6 X3 7 X4 12 X5 11 X6 10 X7 9 EN 2 A0 1 A1 16 A2 15 V- 3 D 8 GND 14 V+ 13 Z101 DG408DY X0 4 X1 5 X2 6 X3 7 X4 12 X5 11 X6 10 X7 9 EN 2 A0 1 A1 16 A2 15 V- 3 D 8 GND 14 V+ 13 Z102 DG408DY X0 4 X1 5 X2 6 X3 7 X4 12 X5 11 X6 10 X7 9 EN 2 A0 1 A1 16 A2 15

17、 V- 3 D 8 GND 14 V+ 13 Z103 DG408DY X0 4 X1 5 X2 6 X3 7 X4 12 X5 11 X6 10 X7 9 EN 2 A0 1 A1 16 A2 15 V- 3 D 8 GND 14 V+ 13 Z104 DG408DY X0 4 X1 5 X2 6 X3 7 X4 12 X5 11 X6 10 X7 9 EN 2 A0 1 A1 16 A2 15 V- 3 D 8 GND 14 V+ 13 Z105 DG408DY LIN 4 LGND 5 RGND 12 RIN 13 LMO 2 RMO 15 AVCC 1 DVCC 7 LFO 3 RFO

18、 14 DGND 11 XCS 6 DATA 9 CCLK 10 XMUTE 8 AGND 16 Z107 VSDVC 0V_SIG C186 100N SM +5V + C154 10U EL C155 100N SM C156 100N SM 0V_SIG 0V_SIG +5V SCLK SDATA SLOAD 0V_SIG 0V_SIG R200 2R2 SM R201 2R2 SM R202 2R2 SM 0V_SCLK 0V_SLOAD 0V_SDATA C158 22P SM C159 22P SM 0V_SIG 0V_SIG SEL1 1 S2 14 D1 2 V+ 13 S1

19、3 S3 11 V- 4 GND 5 VL 12 S4 6 D3 10 D4 7 SEL3 9 D2 15 SEL4 8 SEL2 16 Z106 DG413DY +15V-15V 0V_SIG +5V TONE* TONE* TONE* TONE* C152 100N SM 0V_SIG C153 100N SM R186 47R SM R187 47R SM R185 22R SM +C157 100U EL R110 2K2 SM R111 2K2 SM + C110 100U EL R112 22K SM 0V_SIG R113 22K SM + C111 10U CERAFINE +

20、5V 3 2 1 Z111A TL072 SM 5 6 7 Z112B TL072 SM 3 2 1 Z112A TL072 SM 5 6 7 Z111B TL072 SM 84 Z109C TL072 SM 84 Z110C TL072 SM + C117 10U CERAFINE R121 22K SM R119 22K SM R120 22K SM +C116 10U CERAFINE 0V_SIG D105 BAV99W DUAL SM 0V_SIG R114 22K SM R118 22K SM 1618 17 Z108D DS1844 1519 14 Z108A DS1844 R1

21、15 2K7 SM R116 2K7 SM 0V_SIG R117 5K6 SM R135 2K2 SM R136 2K2 SM + C131 100U EL R137 22K SM 0V_SIG R138 22K SM + C132 10U CERAFINE +5V 3 2 1 Z113A TL072 SM 5 6 7 Z114B TL072 SM 3 2 1 Z114A TL072 SM 5 6 7 Z113B TL072 SM + C138 10U CERAFINE R146 22K SM R144 22K SM R145 22K SM +C137 10U CERAFINE 0V_SIG

22、 D111 BAV99W DUAL SM 0V_SIG R139 22K SM R143 22K SM 62 7 Z108B DS1844 53 4 Z108C DS1844 R140 2K7 SM R141 2K7 SM 0V_SIG R142 5K6 SM 84 Z111C TL072 SM 84 Z112C TL072 SM +15V +15V -15V -15V C169 100N SM C168 100N SM C172 100N SM C173 100N SM C176 100N SM C177 100N SM C180 100N SM C181 100N SM 0V_SIG0V_

23、SIG0V_SIG0V_SIG C170 100N SM C171 100N SM C174 100N SM C175 100N SM C178 100N SM C179 100N SM C182 100N SM C183 100N SM C184 100N SM C185 100N SM 0V_SIG0V_SIG0V_SIG0V_SIG0V_SIG PS 1 R/W 8 DOUT 11 RST 9 DIN 12 CLK 13 VCC 20 GND 10 Z108E IC DS1844 +5V SDATA SCLK TONEID C118 100N SM +C120 10U EL 0V_SIG

24、 C119 10N SM R122 2R2 SM 0V_TONEID C115 22P SM C136 22P SM 0V_SDATA 0V_SCLK R124 2R2 SM R123 2R2 SM R151 22K SM R147 22K SM R152 22K SM R148 22K SM R153 22K SM R149 22K SM R154 22K SM R150 22K SM R155 22K SM LISTEN 0 LISTEN 1 LISTEN 2 VCR 0 VCR 1 VCR 2 TAPE 0 TAPE 1 TAPE 2 TONE* 0V_TONEID TONEID 0V_

25、SDATA SDATA 0V_SLOAD SLOAD 0V_SCLK SCLK 1 2 3 4 SK102 AMPCT4 0V_SIG 1 2 3 4 5 6 7 8 SK103 AMPCT8 +15V 0V_SIG -15V AUX R AUX L TO PHONO PCB TO POWER AMP I/P TO MICRO / DISPLAY PCB 3 2 1 Z115A OPA2134PA SM 3 2 1 Z116A OPA2134PA SM 3 2 1 Z117A OPA2134PA SM 5 6 7 Z117B OPA2134PA SM 84 Z115C OPA2134PA SM

26、 84 Z117C OPA2134PA SM RLY100A RLY DPDT 5V SM RLY100B RLY DPDT 5V SM + - RLY100C RLY DPDT 5V SM D120 BAS16W SM Q100 BC849B R203 4K7 SM MUTE* 0V_D +5V MUTE* 0V_D +C187 10U EL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 SK101 FFC30V SM 0V_MODULE AUX L AUX R CD L CD

27、 R TUNER L TUNER R AV L AV R DVD L DVD R TAPE IN L TAPE IN R VCR IN L VCR IN R MODULE L MODULE R TO PLUG IN MODULE PCB +5V R188 10K SM 0V_SIG 0V_HF D121 BAV99W DUAL SM D122 BAV99W DUAL SM +15V-15V C113 470N PE C134 470N PE C150 470N PE C151 470N PE +C188 10U EL +C189 10U EL +15V -15V 0V_SIG +C190 10

28、U EL +C191 10U EL +15V -15V 0V_SIG R204 10K SM C112 470N PE C192 470N PE C133 470N PE C193 470N PE C114 CFKP2 63V 2N2 C135 CFKP2 63V 2N2 CDL1CDL CDR CDR1 TUNL1 TUNR1 TUNL TUNR AVL1 AVR1 AVL AVR DVDL1 DVDR1 DVDL DVDR TAPEIL1 TAPEIR1 TAPEIL TAPEIR VCRIL1 VCRIR1 VCRIL VCRIR AUXL AUXR +15V1 -15V1 AUXL1

29、AUXR1 LISTEN2 LISTEN1 LISTEN0 LIST2 LIST1 LIST0 VCR2 VCR1 VCR0 VCR21 VCR11 VCR01 TAPE2 TAPE1 TAPE0 TAP2 TAP1 TAP0 TAPEO1 TAPE02 VCRO1 VCR02 Z115_1A Z116_1A /TONE Z107_4 Z107_13 Z107_1 SK102_1 SK102_3 Z116_1B Z113_3 Z111_3 Z115_1B Z111_1 Z111_7 Z108_19 Z112_3 Z112_1 Z112_7 TONEID SDATA SCLK Z106_11Z1

30、14_7 Z114_1 Z114_3 Z108_3 Z113_7 Z113_1 AUXIL1 AUXIR1 Z106_14 +15V2 -15V2 R182 100R SM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 SK100 FFC22V1MM C147 100N PE C167 100N PE 01_1142JBR14/8/01First production release1.0 R181 10K SM 01_E014JBR28/11/01Fuses uprated to 2A1.1 03_E291MJT07/10/

31、03 Transistors Q301(4B5248) & Q305(4B1964) obsolete. 1.2 Replace with 4B5171 & 4B1930. Replaced 470p caps 2D147W with 2DA147 C101 470P FKP2 100V C102 470P FKP2 100V C103 470P FKP2 100V C122 470P FKP2 100V C123 470P FKP2 100V C124 470P FKP2 100V C140 470P FKP2 100V C141 470P FKP2 100V C142 470P FKP2

32、100V C161 470P FKP2 100V C162 470P FKP2 100V C163 470P FKP2 100V C165 470P FKP2 100V C166 470P FKP2 100V Contact Tel: 01223 203200 Contact Engineer: Mark Tweedale RadioFans.CN 1234 A B C D 4321 D C B A ISSUE DRAWING NO. 23425 DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE J:Chang

33、e_ControlECO_WIP03_E291 Transistor obsolete P7 A32 A90 C30 - MJTL937AY - A32 A90 preamp boardL937_1.2.ddb - DocumentsSchematicL937C3_1.2.SCH A & R Cambridge Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9PB Integrated amplifier preamp - power supply Circuit Diagram L937C3 JBR

34、9-Oct-2003 INITIALS Date Printed 33Sheetof Notes: 1 2 3 4 SK300 MOLEXPWR4 +C300 1000u 35V +C310 1000u 35V D302 BAS16W SM D308 BAS16W SM Vin I ADJ A Vout O Z301 LM317T D305 BAS16W SM D304 BAS16W SM R303 470R SM + C305 10U EL C304 100N SM R302 1K2 SM R307 220R SM +15V -15V +5V 0V_PSU SP300 STAR POINT

35、4 0V_PSU 0V_SIG 0V_HF0V_MODULE +C306 470U EL 25V C307 470N PE C308 100N SM C309 100N SM +C302 220U EL +C312 220U EL Q300 J112 Q303 J112 R300 330R SM R304 330R SM + C303 3300u 25V +C313 3300u 25V D310 15V 350MW SM D311 15V 350MW SM Q306 BC846B Q307 BC856B 1 2 3 4 SK301 IDC4S +15V -15V 0V_PSU 0V_MODUL

36、E AC1 AC2 UR+ UR- D311- D310+ +15V3 +5V +3.75V 0V_SIG -15V3 C314 1N0 PP C315 1N0 PP D300 S1D D301 S1D D306 S1D D307 S1D 01_1142JBR14/8/01First production release1.0 01_E014JBR28/11/01Fuses uprated to 2A1.1 F300 T2A SM F301 T2A SM 03_E291MJT07/10/03 Transistors Q301(4B5248) & Q305(4B1964) obsolete. 1.2 Replace with 4B5171 & 4B1930. Replaced 470p caps 2D147W with 2DA147 Q305 2SA1930 Q301 2SC5171 Contact Tel: 01223 203200 Contact Engineer: Mark Tweedale RadioFans.CN