Arcam-CD72-cd-sm维修电路原理图.pdf

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1、CD72/92DiVA CD72, CD92 Compact Disc Player Service Manual ARCAMIssue 1.0RadioFans.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 收音机爱 好

2、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 CD92 T

3、he 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 Soft

4、ware 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 out

5、put 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) Display

6、 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 level

7、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 the fo

8、llowing 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 inp

9、ut 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 micro

10、 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 R31

11、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. This

12、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 the

13、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 conne

14、cted 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 through t

15、o 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 and the

16、 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 boar

17、d) 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 the

18、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 still fun

19、ctions. 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 top e

20、dge 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 to th

21、e 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 slightly

22、 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 the 2 p

23、oints 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 correctly an

24、d 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 (marked 1)

25、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 finger

26、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 into the

27、 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 as li

28、sted 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 the to

29、p 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 may n

30、ot 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 integral

31、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 come ful

32、ly 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 342216 CD72 / CD92 Servic

33、e 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 Check remo

34、te 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 cable Check f

35、or 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 volts SK2

36、91 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 version. ! Plea

37、se 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 requires a differ

38、ent transformer. 12345678ABCD87654321DCBAISSUEDRAWING NO.DRAWING TITLEDrawn by:DATEFilenameECO No.DESCRIPTION OF CHANGEG:DATAECOECO AGENDA00 1093 L887PB 2L887 2L887 2.ddb - L887c1 2.prjA & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PBCD72, CD92 Project SheetCircui

39、t DiagramL887C1_2CW12-Oct-2000INITIALSDate Printed14SheetofNotesLK1LINK10NPLK2L NK10NPLK3LINK10NPLK4L NK10NPLK5LINK10NPLK6L NK10NPLK7LINK10NPLK8L NK10NPLK9L NK10NPLK10LINK10NPLK11LINK10NPLK13LINK10NPLK15LINK10NPLK16L NK10NPLK17LINK10NPLK18L NK10NPLK19L NK10NPLK130LINK10NPLK21LINK10NPLK22L NK10NPLK23

40、LINK10NPLK25LINK10NPLK28L NK10NPLK29L NK10NPLK30LINK10NPLK31LINK10NPLK33LINK10NPLK35LINK10NPLK37LINK10NPLK38L NK10NPLK39L NK10NPLK40LINK10NPLK41LINK10NPLK42L NK10NPLK43LINK10NPLK44L NK10NPLK46L NK10NPLK47LINK10NPLK49L NK10NPLK50LINK10NPLK51LINK10NPLK52L NK10NPLK53LINK10NPLK54L NK10NPLK55LINK10NPLK56

41、L NK10NPLK57LINK10NPLK58L NK10NPLK59L NK10NPLK60LINK10NPLK61LINK10NPLK62L NK10NPLK63LINK10NPLK64L NK10NPLK65LINK10NPLK67LINK10NPLK68L NK10NPLK69L NK10NPLK70LINK10NPLK71LINK10NPPhoto StripPSPHOTO_STR PUpdate BoxA2UPDATE_BOXLK72L NK10NPLK73LINK10NPLK74L NK10NPLK75LINK10NPLK76L NK10NPLK77LINK10NPLK78L

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43、onTooling Holes & Alignment MarksSpare FusePaper MarkerA2 HorizontalDD3DD_A2HPaper MarkerA2 VerticalDD2DD_A2VCEM1, 2 OZ CuPCB MATERIALDD5CEM1_20ZFOR ROS PROGRAMME INCLUDE A7 FOR ALPHA 7 CDLK98L NK10NPLK99L NK10NPFD_3FIDUCIALFD_4F DUCIALPCBPCBL887PB_2TL6TOOL NG_OPTWF07-04-00ANEW PROTOTYPE-LK96L NK10N

44、PLK107LINK10NP12Z4A74HC1434Z4B74HC1456Z4C74HC1489Z4D74HC141011Z4E74HC141213Z4F74HC14147Z4G74HC14C58100N CDR6747R MFR68330R MF12345678910111213141516SK2DIL16 HSKTAlpha 7 CD Configuration PlugLD NLDOUTINOUTF LAF LB4MHZL887C2_2L887C2_2 SCHDEEMSMUTEAMUTERM NPGMLCLKDATASCORSQCKXRSTLDONXLTSENSESUBQL887C3_

45、2L887C3_2 SCHF LAF LBK0K1K0K1NOUTLD NLDOUT4MHZDEEMAMUTESMUTERMINPGMLCLKDATASCORSQCKXRSTLDONXLTSENSESUBQL887C4_2L887C4_2 SCHEL1LCD CHA REL2LCD CHA RLK108LINK10NPLK109L NK10NPLK110LINK10NPLK111L NK10NP+C100010U ELLK120L NK10NPLK119L NK10NPLK118L NK10NPLK117LINK10NPLK125L NK10NPLK124L NK10NPLK123L NK10

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47、78ABCD87654321DCBAISSUEDRAWING NO.DRAWING TITLEDrawn by:DATEFilenameECO No.DESCRIPTION OF CHANGEG:DATAECOECO AGENDA00 1093 L887PB 2L887 2L887 2.ddb - L887c2 2.schA & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PBCD72, CD92 CD PlayersCircuit DiagramL887C2_2CW12-Oct-

48、2000INITIALSDate Printed24SheetofNotesF1T160MAD121N4003F+C34100U EL 100V+C363M3 EL+C3710U ELR38330R MFR411K6 MF+C431M0 25VD131N4003FCDM14 Supply +7.3VVinIADJAVoutOZ207LM317TR43330R MFR421K0 MFD141N4003FDAC Supply +5VR44 1R0 FUR451R0 FUVinIADJAVoutOZ204LM317TVinIADJAVoutOZ205LM337TR39220R MFD151N4003

49、FD161N4003FR551K2 MF12345SK2058K2005C5510N CD+C41100U ELLOADOUTLOAD NGNDINSWOUTSW1234567891011121314151617181920212223SK204FFC23VLDINLDOUTINOUTP7VFILAFILBVinIGNDGVoutOZ208 7805+C42100U ELVinIGNDGVoutOZ2097915R51 22R FUR5222R FUD1715V 400MW+C35100U EL 100VD187V5 400MWR5333K MFPower connector to DAC P

50、CBP12VN12VP7VP5VP5V DACN30VP11VAC1AC2ACACAC2AC1D221N4003FD231N4003FR58 10R FULIVENEUTP22VUNN22VUNN12VP12VP11VP11VSWP7VP5VDACP5VAGNDDGNDF LAF LASWLOADOUTLOAD NINSWOUTSWRLYVN30VACAUD1ACAUD2ACAUDGACDIG1ACDIG2ACDIG3F LACFILBGND5VDACP5VP5V DACN12VP12VP11VNEUT2115V230VGND1O/P In23Bias4LoadIn5LoadOut6Vcc7V