Arcam-CD72-cd-sm维修电路原理图.pdf

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1、CD72/92 DiVA CD72, CD92 Compact Disc Player Service Manual ARCAM Issue 1.0 RadioFans.CN 收音机爱 好者资料库 Contents List ! Contents list ! Circuit description ! Upgrade procedure ! Service guide ! Circuit diagrams ! Component overlays ! Circuit board parts list ! General assembly parts list RadioFans.CN 收音机

2、爱 好者资料库 CD72/CD92 Circuit Description SUMMARY The Main PCB for the DiVA CD72/92 player may be built as two different versions: ! With all components fitted for the Alpha CD72 (L887RS) ! With audio components and connectors omitted, for use as a motherboard for plug-in DAC module L816 (L888RS) for CD

3、92 The CD72 version may be converted for use with a upgrade plug-in DAC board by removing a configuration connector. The system is based on a Sony kit, comprising CDM14-5BD10 laser mechanism & loader, micro-controller and fluorescent display. The PCM 1716, as per the 1710, can be operated in either

4、Software or Hardware mode. The default for the CD72 is hardware mode. Power Supplies & Reset/Mute Selection for 230V or 115V mains operation is made by inserting a fuse into the appropriate position. The mains transformer has three secondary windings: 1. Provides +12V and -12V supplies for the audio

5、 output circuitry via regulators Z204 and Z205. 2. This produces the digital, motor drive and fluorescent display grid supplies: +7.3V (Z206) Mechanism and motor driver supply +5V (Z208) General digital logic supply +5V (Z207) Supply to DAC +5V (Z203) Supply to system clock generator -30V (Z209) Dis

6、play grid voltage. 3. Provides an AC supply for the display filament. The power-on reset signal XRST is generated by R17 and C29. When the power switch is turned off one of its poles discharges C29 quickly. This, along with the AMUTE signal from the micro, controls the output mute transistors via le

7、vel shifter Q3. Remote Control/PIC Micro The PIC micro controller converts the RC-5 format data into the NEC format required by the Sony micro. The PIC also controls the configuration of the digital filter/DAC on the DAC board. Micro controller & Display Board The system micro controller Z212 has th

8、e following functions: ! Control of the mechanism & decoder on the CDM14 ! Control of mute, attenuation and deemphasis for the DAC ! Direct drive of the fluorescent display ! Remote control decoding ! Keyboard scanning The keyboard scanning works by connecting the keys to a resistor ladder on an ADC

9、 input to the micro. Pressing a key presents a unique voltage to this input. The remote control data contains a Customer Code that identifies this as an Arcam product. The diode network D291 to D297 configures the micro to accept this code. Motor Driver The status of the drawer is indicated to the m

10、icro by two micro switches INSW and OUTSW on SK205. The micro controls the drawer motor via driver Z210. DAC & System Clock The DAC is a Burr Brown PCM1716. Mute, attenuation and de- emphasis functions can be controlled via a 3-wire serial link from the system micro to pins 26, 27 & 28 via resistors

11、 R31 R32 & R33 respectively. Currently resistors R31 to R33 are not fitted and the DAC is configured for hardware control. Digital audio is input on pins 1, 2 & 3 in standard Sony format, i.e. Word Clock, Bit Clock and Data. The system clock is based around 16.9344 MHZ crystal X1 and transistor Q2.

12、This produces a stable clock with low jitter. Z202E & D provide amplification and buffering to the DAC. Analogue Filters Z1A (& Z101A) provides the basis for a 2-pole filter. Z1B (& Z101B) buffer the audio and set the output level. Digital Output An SPDIF format digital output signal is generated by

13、 the decoder on the mechanism assembly. This is passed through isolating transformer T202 to a single phono socket SK5. Optical digital output via Z2 is also tapped off the digital output signal. Power is supplied to Z2 via Z3 a 78L05 regulator. Upgrade to CD92 The CD72 includes a configuration PCB

14、connected to PL1. This provides power to the DAC and clock generator, connects the digital audio and system clock signals to the DAC and provides additional clock buffering with Z4 A&B . Removing this board removes these connections and allows the system clock generated on the DAC board to pass thro

15、ugh to the CDM14. Upgrading a CD72 to CD92 1. Disconnect the mains supply from the DiVA CD player. 2. Remove the top cover by taking out the 2 screws from the top edge of the rear panel (marked 1) and on each side (marked 2). 3. Pull off the sticky plastic gasket between the digital output socket an

16、d the audio output sockets to reveal the 4 audio output socket holes through which the DAC board sockets will pass. 4. Any remnants of adhesive can be removed by rubbing it gently with your finger and rolling it off. We do not recommend the use of solvents. 5. Fit the 2 supplied PCB (printed circuit

17、 board) pillars to the holes in the main board on either side of the flexfoil coming from the display board. These are marked 3 on the drawing overleaf. The big end of the PCB pillars goes into the main PCB. These push in and clip home. Take great care not to damage the main circuit board. 6. Remove

18、 the Configuration Module (the small vertically mounted PCB in the centre of the main board). It will not be needed once the new DAC board is fitted. 7. Note: The original nickel plated audio output sockets are no longer connected after the upgrade and cannot be used. However the digital output stil

19、l functions. 8. Remove the following jumpers :- PL2, PL3, PL4, PL6. Fit the following jumpers :- PL5, PL7. 9. Fit the magnetic shielding plate, by peeling off one side of (E923MC the adhesive pad) and stick to (E922MC the shielding plate). Then peel the backing off the other side of pad & Align the

20、top edge with the top of the transformer and fit centrally. It MUST align with the top edge of the transformer, if it is fitted to low to the board it may cause shorting. 10. Take static precautions first. With the aluminium extrusion of the DAC module uppermost fit the flexfoils from the module in

21、to the appropriate sockets in the main board, ensuring they are pushed fully home. If they are not pushed fully home, the unit may not read discs. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module sli

22、ghtly upwards to achieve this. 11. Push the module down firmly on to the support pillars. 12. Fit the supplied screws with integral washers to the 3 points marked 4 on the drawing overleaf to secure the module in place. The 2 slightly shorter screws and the shake proof washers should be fitted to th

23、e 2 points marked 6. 13. Refit the top cover, connect the unit to live mains and switch on. Press load to allow the tray to come fully out and then remove the mains lead from the unit. Remove the draw front and fit the new draw front with the CD92 / HDCD logo on. 14. Check the unit functions correct

24、ly and if you have an HDCD disc check that a red glow is seen behind the display window when it is playing. Upgrading a CD72 ( TEXT ) to CD92 ( TEXT ) 1. Disconnect the mains supply from the DiVA CD player. 2. Remove the top cover by taking out the 2 screws from the top edge of the rear panel (marke

25、d 1) and on each side (marked 2). 3. Pull off the sticky plastic gasket between the digital output socket and the audio output sockets to reveal the 4 audio output socket holes through which the DAC board sockets will pass. 4. Any remnants of adhesive can be removed by rubbing it gently with your fi

26、nger and rolling it off. We do not recommend the use of solvents. 5. Fit the 2 supplied PCB (printed circuit board) pillars to the holes in the main board on either side of the flexfoil coming from the display board. These are marked 3 on the drawing overleaf. The big end of the PCB pillars goes int

27、o the main PCB. These push in and clip home. Take great care not to damage the main circuit board. 6. Note: The original nickel plated audio output sockets are no longer connected after the upgrade and cannot be used. However the digital output still functions. 7. Set the main board jumper settings

28、as listed below :- PL200 ON PL201 ON PL202 ON PL203 OFF PL204 ON PL205 OFF PL300 2 and 3 PL400 OFF PL401 OFF PL402 OFF 8. Fit the magnetic shielding plate ( part no E922MC ) to the adhesive pad ( part no E923MC). Peel the backing off the other side of the mains transformer. Align the top edge with t

29、he top of the transformer and fit centrally. 9. Take static precautions first. With the aluminium extrusion of the DAC module uppermost fit the flexfoils from the module in to the appropriate sockets in the main board, ensuring they are pushed fully home. If they are not pushed fully home, the unit

30、may not read discs. You may find it helps to slide the module into the unit so that the audio output sockets fit through the holes in the rear panel and angle the module slightly upwards to achieve this. 10. Push the module down firmly on to the support pillars. 11. Fit the supplied screws with inte

31、gral washers to the 3 points marked 4 on the drawing overleaf to secure the module in place. The 2 slightly shorter screws and the shake proof washers should be fitted to the 2 points marked 6. 12. Refit the top cover, connect the unit to live mains and switch on. Press load to allow the tray to com

32、e fully out and then remove the mains lead from the unit. Remove the draw front and fit the new draw front with the CD92 / HDCD logo on. 13. Check the unit functions correctly and if you have an HDCD disc check that a red glow is seen behind the display window when it is playing 3 4 2 2 1 6 CD72 / C

33、D92 Service Guide Fault diagnostics Fault Action No power Check mains fuse Check power supply rails No Audio output Check for digital output, if ok then check power supply voltages Check DAC chip Intermittent noise on output Check Dac chip Fails to respond to commands Check supply to remote circuit

34、Check remote flex foil cable Check for +4.9volts on RX201 o/p Fails to read disc Check mech supply Check clock signal Laser optic moves to end stop position Caused by failure of clock signal to the mech Check mech supply Check clock signal No Display Check filament voltage 3.1vac Check flex foil cab

35、le Check for dry joints on micro and display Spurious display readout Check for dry joints on display board Power supply test points Position Voltage DGND 0 volts PL6 +12 volts PL3 -12 volts R65 +11 volts Z206 o/p +7.3 volts - mech supply Z207 o/p +5 volts - DAC supply Z208 o/p +5 volts Z209 o/p -30

36、 volts SK291 across pins 1 and 32 3.1 volts AC display filament Hints & tips ! When upgrading from CD72 to CD92 remember to fit the steel plate to the transformer, this reduces noise. ! The CDM14 mech ( part no. B2009 ) is interchangeable between the Alpha7 series and the DiVA CD72/92 non text versi

37、on. ! Please note that the CD72/92 TEXT units use a different mech ( part no. B2012 ), the display and main boards are also different and therefore are not interchangeable parts. ! Voltage conversion 230/115VAC by changing the internal fuse position and fitting the correct rated fuse. 100VAC require

38、s a different transformer. 12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE G:DATAECOECO AGENDA00 1093 L887PB 2L887 2L887 2.ddb - L887c1 2.prj A & R Cambridge Ltd. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9

39、PB CD72, CD92 Project Sheet Circuit Diagram L887C1_2 CW12-Oct-2000 INITIALS Date Printed 14Sheetof Notes LK1 LINK10NP LK2 L NK10NP LK3 LINK10NP LK4 L NK10NP LK5 LINK10NP LK6 L NK10NP LK7 LINK10NP LK8 L NK10NP LK9 L NK10NP LK10 LINK10NP LK11 LINK10NP LK13 LINK10NP LK15 LINK10NP LK16 L NK10NP LK17 LIN

40、K10NP LK18 L NK10NP LK19 L NK10NP LK130 LINK10NP LK21 LINK10NP LK22 L NK10NP LK23 LINK10NP LK25 LINK10NP LK28 L NK10NP LK29 L NK10NP LK30 LINK10NP LK31 LINK10NP LK33 LINK10NP LK35 LINK10NP LK37 LINK10NP LK38 L NK10NP LK39 L NK10NP LK40 LINK10NP LK41 LINK10NP LK42 L NK10NP LK43 LINK10NP LK44 L NK10NP

41、 LK46 L NK10NP LK47 LINK10NP LK49 L NK10NP LK50 LINK10NP LK51 LINK10NP LK52 L NK10NP LK53 LINK10NP LK54 L NK10NP LK55 LINK10NP LK56 L NK10NP LK57 LINK10NP LK58 L NK10NP LK59 L NK10NP LK60 LINK10NP LK61 LINK10NP LK62 L NK10NP LK63 LINK10NP LK64 L NK10NP LK65 LINK10NP LK67 LINK10NP LK68 L NK10NP LK69

42、L NK10NP LK70 LINK10NP LK71 LINK10NP Photo Strip PS PHOTO_STR P Update Box A2 UPDATE_BOX LK72 L NK10NP LK73 LINK10NP LK74 L NK10NP LK75 LINK10NP LK76 L NK10NP LK77 LINK10NP LK78 L NK10NP LK79 L NK10NP LK80 LINK10NP LK81 LINK10NP LK82 L NK10NP LK83 LINK10NP LK85 LINK10NP LK86 L NK10NP LK87 LINK10NP L

43、K88 L NK10NP LK89 L NK10NP LK90 LINK10NP LK91 LINK10NP LK92 L NK10NP LK93 LINK10NP F4 T160MASP TL1 TOOL NG3 0 FD_2 F DUCIAL LK94 L NK10NP LK95 LINK10NP LK97 LINK10NP TL3 TOOLING3.0 TL4 TOOLING3.0 TL5 TOOLING3.0 Links Documentation Tooling Holes & Alignment Marks Spare Fuse Paper Marker A2 Horizontal

44、 DD3 DD_A2H Paper Marker A2 Vertical DD2 DD_A2V CEM1, 2 OZ Cu PCB MATERIAL DD5 CEM1_20Z FOR ROS PROGRAMME INCLUDE A7 FOR ALPHA 7 CD LK98 L NK10NP LK99 L NK10NP FD_3 FIDUCIAL FD_4 F DUCIAL PCB PCB L887PB_2 TL6 TOOL NG_OPT WF07-04-00ANEW PROTOTYPE- LK96 L NK10NP LK107 LINK10NP 12 Z4A 74HC14 34 Z4B 74H

45、C14 56 Z4C 74HC14 89 Z4D 74HC14 1011 Z4E 74HC14 1213 Z4F 74HC14 14 7 Z4G 74HC14 C58 100N CD R67 47R MF R68 330R MF 12 34 56 78 910 1112 1314 1516 SK2 DIL16 HSKT Alpha 7 CD Configuration Plug LD N LDOUT INOUT F LA F LB4MHZ L887C2_2 L887C2_2 SCH DEEM SMUTE AMUTE RM N PGML CLK DATA SCOR SQCK XRST LDON

46、XLT SENSE SUBQ L887C3_2 L887C3_2 SCH F LA F LB K0 K1 K0 K1 NOUT LD N LDOUT 4MHZ DEEM AMUTE SMUTE RMIN PGML CLK DATA SCOR SQCK XRST LDON XLT SENSE SUBQ L887C4_2 L887C4_2 SCH EL1 LCD CHA R EL2 LCD CHA R LK108 LINK10NP LK109 L NK10NP LK110 LINK10NP LK111 L NK10NP +C1000 10U EL LK120 L NK10NP LK119 L NK

47、10NP LK118 L NK10NP LK117 LINK10NP LK125 L NK10NP LK124 L NK10NP LK123 L NK10NP LK122 L NK10NP LK121 L NK10NP LK127 L NK10NP LK126 L NK10NP Ground decoupling LK135 LINK10NP LK133 LINK10NP LK132 LINK10NP LK136 LINK10NP FD_1 FIDUCIAL CL13-07-00REVISIONSB CL03-08-00PRODUCTION RELEASE1 CW11-10-00TRACKS

48、MOVED TO CLEAR P LLARS & C64 ADDED FOR EMC CL15-09-00EARTH L NK 8M101 ADDED1.1 00_1083 00_10932 12345678 A B C D 87654321 D C B A ISSUE DRAWING NO. DRAWING TITLE Drawn by: DATE Filename ECO No.DESCRIPTION OF CHANGE G:DATAECOECO AGENDA00 1093 L887PB 2L887 2L887 2.ddb - L887c2 2.sch A & R Cambridge Lt

49、d. Pembroke Avenue Denny Industrial Centre Waterbeach Cambridge CB5 9PB CD72, CD92 CD Players Circuit Diagram L887C2_2 CW12-Oct-2000 INITIALS Date Printed 24Sheetof Notes F1 T160MA D12 1N4003F + C34 100U EL 100V +C36 3M3 EL +C37 10U EL R38 330R MF R41 1K6 MF + C43 1M0 25V D13 1N4003F CDM14 Supply +7.3V Vin I ADJ A Vout O Z207 LM317T R43 330R MF R42 1K0 MF D14 1N4003F DAC Supply +5V R44 1R0 FU R451R0 FU Vin I ADJ A Vout O