Arcam-DivaA65-int-sm维修电路原理图.pdf

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1、A65/75 DiVA A65, A75 & P75 Plus Amplifi ers Service Manual ARCAMARCAM Issue 1.0 RadioFans.CN 收音机爱 好者资料库 Contents List ! Contents list ! Circuit description ! Service guide ! Circuit diagrams ! Component overlays ! Circuit board parts list ! General assembly parts list RadioFans.CN 收音机爱 好者资料库 A65/75/

2、75P Plus Circuit Description PSU In order get the output devices to turn fully on and achieve the greatest efficiency, an auxiliary rail is formed from a charge pump driven by the main AC outputs from the transformer. C304,305 & D301,302 charge on alternate cycles. In the other cycle the charge on C

3、304,305 is pumped into C310,311 respectively. This creates a voltage much greater than the standard rails, but with low regulation and high ripple. This is then regulated to 38V via emitter followers Q300,302,303,305 from a zener stabilized voltage (D304,305) The Pre-amp 15V supply comes from linear

4、 regulators Z300,301. The transformer is a dual voltage unit, the required voltage being selected by which fuse holder is fitted with the appropriate fuse. If an alternative to 115V or 230V is required then a different transformer is fitted. The secondary is centre tapped for the main rails, but a s

5、eparate winding is added for the uC supply. The star ground point SP300 is not a component on the PCB and is on the schematic only for layout purposes. Pre-amp The direct signal path (line in, tone controls defeated) consists of a single op-amp gain stage, buffering the j-fet input multiplexers and

6、Tape Monitor and AV switches. The selected input is AC coupled to the op-amp, the output is DC to the Pre-out, via a j-fet pre-mute switch. This switch is controlled by the uC in such a way that when ever the output relay changes state signal is removed from the power amplifier (A65/75). The MM phon

7、o stage (by passable A75 only, SW100) is opamp based. The circuit is AC coupled to give RIAA/IEC low frequency response. The cartridge is loaded by R100,101,C119,120. The 1kHz gain is 56dB, and RIAA eq set by R110,112,111,113,C127,129,128,130. Each line input has static protection afforded by the ba

8、ck to back diodes (e.g. D101,103), and RF filtering is set by R118,C134 etc. The selected input is buffered for Tape output by Z104 set as a follower. The output resistor is inside the feedback loop so to keep the output impedance low and short protection is catered for. C121,122 maintain stability

9、into capacitive loads. From the tape monitor switch (Z105) onwards the signal is AC coupled (C151,152). From there the signal is fed to the tone controls. These consist of two stages: Balance and buffer (Z160), and Bass/Treble Z161. The output of this stage is again AC coupled. Switch SW162 selects

10、whether the tone adjusted signal or a direct signal reaches the gain section. In the A75 Z164 can be used to bypass the volume control when AV input is selected. This fixes the gain to allow an external AV processor to control the volume setting. The gain stage (Z163) has a gain of 2.2, and the same

11、 low impedance output arrangement as the Tape output. The signal from this stage to the Pre- amp outputs and the Power amp input is controlled by a A65, A75 & P75 Service Guide Fault diagnostics Fault Action No power Check mains fuse Check transformer connections Check power supply rails Stuck in pr

12、otection Check power supply rails Check protection circuit voltages Check for dry joints on o/p devices Intermittent audio on one channel Check for dry joints around o/p devices Fails to respond to commands Check supply to remote circuit Check IC Z900 Check remote flex foil cable Check for dry joint

13、s on selector pcb Volume control rubs on front panel Pull knob out from fascia Audio crackles on o/p Check for component break down using hot air gun & freezer spray Check transformer connections Power supply test points Position Voltage LK125 +37 volts DC LK126 -37 volts DC LK271 or black speaker t

14、erminal 0 volts LK303 +15 volts DC LK301 - 15 volts DC Q300 emitter +38 volts DC Q304 emitter +38 volts DC Q302 emitter -38 volts DC Q305 emitter -38 volts DC D910 emitter +5 volts DC remote supply IQ settings Model IQ setting Comments - (22/01/02) A65 37mV A75 37mV P75 37mV A85 12mV Set for 8.5mV c

15、old, reset for 12mV when warm P85 12mV Set for 8.5mV cold, reset for 12mV when warm A65 plus 12 to 15mV A75 plus 12 to 15mV P75 plus 12 to 15mV Hints & tips ! To isolate a fault between pre and power stage remove C602 (left channel) or C702 (right channel). ! Always check and re-solder o/p device SA

16、P15N and SAP15P pin connections. ! Replace Z900 IC if software version is below version 3 ( note version 82 is also ok ). ! Make sure R127 is not touching LK130. ! When replacing the top cover with a new top it may be necessary to re-drill the fixing holes. ISSUE DRAWING NO. DRAWING TITLE DATE Filen

17、ame: ECO No.DESCRIPTION OF CHANGE L942C1_1.0.PRJ A65 PLUS AMP Contact Engineer: L942C1 11-Dec-2001 INITIALS Printed:17Sheetof Notes: Contact Tel:(01223) 203 200Travis Pierce A & R Cambridge Ltd. Pembroke Avenue Cambridge CB5 9PB Waterbeach PWRLEFT PROTECTION A1 SP2_SEND_L SP2_RETN_L OP_L A1 LEFT CHA

18、NNEL L942C5_1.0.SCH ACLT1 MUTE AVCONTROL TAPECONTROL MUX1 MUX2 MUX3 PREMUTE PROT SENSE REMOTE CONTROL L942C7_1.0.SCH SELOPR SELOPL MUX1 MUX2 MUX3 TAPECONTROL ACSENSE PROT_OP_L PROT_OP_R PROTECTIONMUTE HPSW2 HPSW1 TAPOL TAPOR PROT SENSE PHONO & INPUTS L942C3_1.0.SCH ACSENSE ACLT1 POWER SUPPLY L942C2_

19、1.0.SCH PWRRIGHT A1 SP2_RETN_R OP_R SP2_SEND_R A1 RIGHT CHANNEL L942C6_1.0.SCH PWRLEFT PWRRIGHT SELOPR SELOPL HPSW2 AVCONTROL HPSW1 SP2_SEND_L SP2_RETN_L OP_L OP_R SP2_SEND_R SP2_RETN_R PREMUTE TAPOR TAPOL PROT_OP_R PROT_OP_L TONE CONTROL L942C4_1.0.SCH TGP12/12/01PRODUCTION RELEASE1.0 USE exlude A6

20、5 FILTER FOR BOM 01_E020 TOP SHEET FOR A65 L942AY ISSUE DRAWING NO. DRAWING TITLE DATE Filename: ECO No.DESCRIPTION OF CHANGE L942C5_1.0.SCH A65 PLUS AMP Contact Engineer: L942C5 11-Dec-2001 INITIALS Printed:57Sheetof Notes: Contact Tel:(01223) 203 200Travis Pierce A & R Cambridge Ltd. Pembroke Aven

21、ue Cambridge CB5 9PB Waterbeach Q600 BC556B Q601 BC556B Q604 2SA970GR Q606 BC546B Q607 BC546B R617 680R MF R619 10K MF R618 10K MF R613 47R MF R614 47R MF R612 100K MF R600 1K0 MF PWRLEFT Q611 2SC2240GR Q610 2SC2240GR R620 10K MF Q603 2SA970GR Q608 BC546B Q609 BC546B +C601 100U EL 100V + C600 100U E

22、L 100V 0V_HF +C616 10U EL L600 2U2H LAC SMALL R631 2R2 CF R630 4R7 W2 CF D603 1N4003F +37V -37V C621 470P CD RLY1A RLY G5Z-2A-E C620 470P CD C622 1N0 CD SPLD600 SPLS600 PD6 OP_L SP2_SEND_L SP2_RETN_L R616 2K7 MF R611 100K MF C603 100P PPW 0V_SIG 0V_HF 0V_SIG 0V_HF Q612 2SC2240GR R627 430R MF R606 10

23、0R MF R605 100R MF R625 6K8 MF R622 10K MF R621 680R MF R629 47K MF +C617 10U EL Q605 BC556B A1 PROTECTION D604 1N4003F R628 430R MF R626 6K8 MF + C618 10U EL R608 100R MF R607 100R MF A1 D605 1N4148 D606 1N4148 0V_LS_L 0V_LS_L Q602 BC556B R615 47R MF R601 100R MF R602 100R MF R603 100R MF R604 100R

24、 MF SPLE600 Left Channel Power Amplifier Q614 SAP15N Q615 SAP15P D600 4V7 400MW ISSUE DRAWING NO. DRAWING TITLE DATE Filename: ECO No.DESCRIPTION OF CHANGE L942C7_1.0.SCH A65 PLUS AMP Contact Engineer: L942C7 11-Dec-2001 INITIALS Printed:77Sheetof Notes: Contact Tel:(01223) 203 200Travis Pierce A &

25、R Cambridge Ltd. Pembroke Avenue Cambridge CB5 9PB Waterbeach WARNING SAFETY CRITICAL COMPONENT REPLACE WITH IDENTICAL PART uC, Volume Drive & Remote Control C912 10N CD C900 10N CD R900 1R0 FU D906 1N4003F D907 1N4003F + C920 1M0 25V C913 10N CD MOTE900 P900 +5v VOLUME DRIVEMOTOR DRIVER +5V GND 1 M

26、D1 2 CC1 3 REF 4 MC1 5 MC2 6 VCC1 7 VCC2 8 CC2 9 MD2 10 Z905 BA6109 12 VOLMOT900 1Y271 ACLT1 MUTE MUX1 MUX2 MUX3 AVCONTROL TAPECONTROL R915 220R MF A0 1 A1 2 A2 3 VSS 4 SDA 5 SCL 6 WP 7 VDD 8 Z906 24C01 C917 100N CD X900 CST4.00 C918 100N CD +C914 220U EL +5v +5v +5v C919 100N CD 1 2 3 SW900A 2PCO_N

27、ON_LAT 4 5 6 SW900B 2PCO_NON_LAT R912 100K MF +C921 10U EL D910 1N4148 R913 10K MF +5v +5V R914 4K7 MF 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG 0V_DIG VDD 16 GND 8 Z907B 74HC4051 R904 10R MF + C915 100U EL PREMUTE 0V_DIG +5V MOTSUP900 VOLM901 VOLM900 REMO900

28、 C916 100N CD 1 2 3 LK903 3WAY CABLE HOLDER D911 1N4148 1 2 3 4 5 6 7 8 9 10 SK900 FFC10V R902 100R MF R903 100R MF ISSUE DRAWING NO. DRAWING TITLE DATE Filename: ECO No.DESCRIPTION OF CHANGE L942C3_1.0.SCH A65 PLUS AMP Contact Engineer: L942C3 11-Dec-2001 INITIALS Printed:37Sheetof Notes: Contact T

29、el:(01223) 203 200Travis Pierce A & R Cambridge Ltd. Pembroke Avenue Cambridge CB5 9PB Waterbeach 3 2 1 Z100A NE5532 C119 100P PP R100 47K MF R108 470R MF C124 47P CD + C125 22U EL R110 680K MF R112 56K MF C127 4N7 PP C129 1N3 PP C120 100P PP R101 47K MF R109 470R MF C123 47P CD + C126 22U EL R111 6

30、80K MF R113 56K MF C128 4N7 PP C130 1N3 PP 5 6 7 Z100B NE5532 -15V +15V CD TUNER VCR AV/DVD TAPE IN TAPE OUT EMC 1 N F SK100A PHONO4G BOT 5 6 TOP 4 N F SK100B PHONO4G EMC 1 N F SK103A PHONO4G N F SK103B PHONO4G EMC 1 N F SK102A PHONO4G N F SK102B PHONO4G EMC 1 N F SK101A PHONO4G 84 Z100C NE5532 Phon

31、o Stage & Input Selection D104 1N4148 D106 1N4148 D105 1N4148 D107 1N4148 D108 1N4148 D112 1N4148 D113 1N4148 D109 1N4148 D114 1N4148 D110 1N4148 D115 1N4148 D111 1N4148 D124 1N4148 D120 1N4148 D121 1N4148 D125 1N4148 D122 1N4148 D126 1N4148 D123 1N4148 D127 1N4148 D101 1N4148 D103 1N4148 D100 1N414

32、8 D102 1N4148 R118 1K0 MF R119 1K0 MF R122 1K0 MF R123 1K0 MF R124 1K0 MF R125 1K0 MF R126 1K0 MF R127 1K0 MF R128 1K0 MF R121 1K0 MF R130 100K MF R131 100K MF R133 100K MF R134 100K MF R135 100K MF R136 100K MF R137 100K MF R142 100K MF R143 100K MF R144 100K MF +15v +15v +15v +15v +15v +15v +15v +

33、15v +15v +15v +15v +15v -15v -15v -15v -15v -15v -15v -15v -15v -15v -15v -15v -15v VCROL VCROR TUNOL TUNOR CDOL CDOR DVDOL DVDOR TAPEOL TAPEOR AUXOL VCROL TUNOL CDOL DVDOL AUXOR VCROR TUNOR CDOR DVDOR TAPECONTROL MUX1 MUX2 MUX3 MUX1 MUX2 MUX3 +5v +5v +15v +15v +15v -15v -15v -15v TAPECONTROL R120 1

34、K0 MF R117 1K0 MF R129 100K MF R132 100K MF AUXOL AUXOR TAPEOL TAPEOR C134 470P PPW C144 470P PPW C143 470P PPW C142 470P PPW C141 470P PPW C140 470P PPW C139 470P PPW C138 470P PPW C137 470P PPW C135 470P PPW C136 470P PPW C133 470P PPW +5v R154 47R MF R155 47R MF C122 100P PP C121 100P PP D116 1N4

35、148 D118 1N4148 D117 1N4148 D119 1N4148-15v -15v +15v +15v +15v +15v +15v -15v -15v -15v 5 6 7 Z104B TL072 3 2 1 Z104A TL072 84 Z104C TL072 SELOPL SELOPR R140 100K MF R141 100K MF MUX3 MUX2 MUX1 TAPECONTROL +15V -15V RLY1C RLY G5Z-2A-E PWR 1 IN1 2 IN2 3 0V 4 V- 5 O 6 FB 7 RC 8 V+ 9 Z101 TA7317P R105

36、 47K MF R103 47K MF R102 47K MF R104 47K MF+ C148 1U0 EL R149 100K MF D128 1N4003F R106 47K MF Q100 2SC2240GR R153 1K0 1W CF D130 1N4003F R145 10K MF R150 100K MF + C149 100U EL +37V R151 18K MF -37V R152 33K MF R107 47K MF D129 1N4003F R147 2K7 1W CF +37V R146 2K7 1W CF R G LED100 LED RED/GRN 3MM D

37、131 5V6 400MW 1 3 2 LK100 L856CA R148 470R FU ACSENSE PROT_OP_L HPSW1 MUTEPROT_OP_R C112 100N CD C113 100N CD C109 100N CD C114 100N CD C110 100N CD C118 100N CD C107 100N CD C108 100N CD C101 100N CD C102 100N CD +C145 10U EL +C146 10U EL C115 100N CD C116 100N CD R139 100K MF R138 100K MF PROTECTI

38、ON 0V_SIG 0V_SIG 0V_SIG 0V_SIG0V_SIG0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG0V_SIG 0V_SIG 0V_SIG 0V_SIG0V_SIG 0V_SIG 0V_SIG 0V_SIG0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_SIG 0V_HF0V_HF 0V_HF 0V_HF 0V_HF 0V_HF 0V_SIG 0V_SIG R

39、114 8K2 MF R115 8K2 MF R116 18K MF + C150 1U0 EL HPSW2 TAPECONTROL MUX1 MUX2 MUX3 C147 100U NP CDL CDR TUNL TUNR VCRL VCRR DVDL TAPL TAPR TAPOL TAPOR TAPOL TAPOR PHINL PHINR DVDR 1 2 3 LK100A 3WAY CABLE HOLDER + C151 100U SILMIC 2 + C152 100U SILMIC 2 R157 100K MF R156 1K5 MF C153 10N CD TH100 PTH90

40、DEG D132 1N4148 PROT SENSE 12 LK101 10MM LINK 12 LK102 10MM LINK 12 LK104 10MM LINK 12 LK103 10MM LINK Therm AC Det Prot RC +15v -15v D134 5V6 400MW C117 470P CD 0V_HF + C131 22U EL + C132 22U EL 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 DG408DJ X0 4

41、 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 Z103 DG408DJ SEL1 1 S2 14 D1 2 V+ 13 S1 3 S3 11 V- 4 GND 5 VL 12 S4 6 D3 10 D4 7 SEL3 9 D2 15 SEL4 8 SEL2 16 Z105 DG413DJ TGP12/12/01PRODUCTION RELEASE1.001_E020 C154 100N PE 100V USE exlude A65 FILTER FOR BOM ISSUE D

42、RAWING NO. DRAWING TITLE DATE Filename: ECO No.DESCRIPTION OF CHANGE L942C2_1.0.SCH A65 PLUS AMP Contact Engineer: L942C2 11-Dec-2001 INITIALS Printed:27Sheetof Notes: Contact Tel:(01223) 203 200Travis Pierce A & R Cambridge Ltd. Pembroke Avenue Cambridge CB5 9PB Waterbeach L N E NEL SK300 IEC3 FS30

43、0 AS1A25 + C308 10M EL 50V + C309 10M EL 50V +300 -300 +15V -15V +37V -37V SW300B A1007 SW300A A1007 SELECT VOLTAGE BY FITTING FS201 OR FS202 MAINS INPUT MAINS SWITCH FIT ONLY ONE FUSE Chassis Earth Point, Use correct screw and washer. R300 100R MF T300 T301 PD300 TOOLING FS301 AS2A5_115V Blue 1 Dar

44、k Grey 2 Orange 3 SK301 CAGECLAMP3 Green 1 SK302 CAGECLAMP1 Grey 1 Grey 2 SK303 CAGECLAMP2 Orange 1 Blue 2 Orange 3 SK304 CAGECLAMP3A GREEN300 OR300 OR301 BLUE301 BLUE300 POWER SUPPLY ACSENSE ACLT1 C301 3N3 MAINS C300 3N3 MAINS C302 3N3 MAINS 0V_DIG 0V_HF PSUP300 NSUP300 MAINS_N300 MAINS_E300 MAINS_

45、L300 WARNING SAFETY CRITICAL COMPONENT REPLACE WITH IDENTICAL PART PD301 TOOLING PD302 TOOLING PD304 TOOLING PD305 TOOLING Y300 TX WIRE CLIP PD311 TARGET1 PD312 TARGET1Y301 TX WIRE CLIP PD306 TOOLING PD307 TOOLING C303 1N0 CD Photo Strip PS300 PHOTO_STRIP Spare Fuse Clip EL300 FUSE CLIP PD303 TOOLIN

46、G PD308 TOOLING PD309 TOOLING PD310 TOOLING Paper Marker A1 Horizontal DD302 DD_A1H CEM1, 2 OZ Cu PCB MATERIAL DD300 CEM1_20Z 0V_DIG PCB PCB1 L940PB_A + 1 2 - 4 3 BR300 BRGBU8D Q300 BC546B Q302 BC556B D303 1N4003F D300 1N4003F D301 1N4003F D302 1N4003F + C310 100U EL 100V + C311 100U EL 100V D304 ZE

47、NER 500MW 39V D305 ZENER 500MW 39V +C312 220U EL 50V +C313 220U EL 50V + C304 47U EL 100V + C305 47U EL 100V R301 4K7 MF R302 4K7 MF +38V_R -38V_R Q304 BC546B Q305 BC556B +38V_L -38V_L R311 10R FU R312 10R FU AC +38V_R +37V_L -37V_R-37V_L LK1 LINK10NP LK6 LINK10NP LK11 LINK10NP LK16 LINK10NP LK21 LI

48、NK10NP LK26 LINK10NP LK31 LINK10NP LK36 LINK10NP LK41 LINK10NP LK46 LINK10NP LK51 LINK10NP LK56 LINK10NP LK61 LINK10NP LK66 LINK10NP LK71 LINK10NP LK96 LINK10NP LK76 LINK10NP LK81 LINK10NP LK86 LINK10NP LK91 LINK10NP LK2 LINK10NP LK7 LINK10NP LK12 LINK10NP LK17 LINK10NP LK22 LINK10NP LK27 LINK10NP L

49、K32 LINK10NP LK37 LINK10NP LK42 LINK10NP LK47 LINK10NP LK52 LINK10NP LK57 LINK10NP LK62 LINK10NP LK67 LINK10NP LK72 LINK10NP LK97 LINK10NP LK77 LINK10NP LK82 LINK10NP LK87 LINK15NP LK92 LINK10NP LK3 LINK10NP LK8 LINK10NP LK13 LINK10NP LK18 LINK10NP LK23 LINK10NP LK33 LINK10NP LK38 LINK10NP LK43 LINK10NP LK48 LINK10NP LK53 LINK10NP LK58 LINK10NP LK63 LINK10NP LK68 LINK10NP LK73 LINK10NP LK98 LINK10NP LK78 LINK10NP LK83 LINK10NP LK88 LINK10NP LK93 LINK10NP LK4 LINK10NP LK9 LINK10NP LK14 LINK10NP LK19 LINK10NP LK24 LINK