Arcam-DivaDT81-tun-sm(2)维修电路原理图.pdf

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1、DT81DiVA DT81 Digital Radio TunerService Manual ARCAMARCAMIssue 1.0RadioFans.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 DT81 Circuit Descrip

2、tion Summary The L918 forms the basis of the DT81 DAB tuner. All the circuitry of the tuner is on the same board, with the exception of the front panel PCB. The tuner is based on the Roke Manor gold card which provides the RF receiver and DAB decoding. To accompany this module the DAB motherboard ha

3、s various power supplies, a Hitachi H8 microcontroller, a D-A converter with output buffer, and an SPDIF transmitter. Power supplies and muting The mains transformer T1 is used for 230V and 115V operation, the voltage selection is done by fitting different fuses. F1 160mA is fitted for 230V and F2 2

4、50mA for 115V. The front panel board is powered from the 7.5V unregulated supply (it has its own regulator). The digital supplies are switched by SW3, while the analogue supplies are on all the time while the mains is connected. Regulated supplies P15V, N15V. +/-15V for the output buffer and DAC 5V

5、regulator. P5VDAC. +5V supply for DAC. P5VDAB. 5V supply for DAB module. P5V. +5V supply for digital circuits - Micro and SPDIF transmitter. P10V. +10V supply for DAB module. P7V5_UR. Unregulated 7.5V supply goes to front panel. Z9 is a Toshiba TA7317. This controls the muting/bypass relay. The same

6、 relay is used for power on/off muting and also FM tuner bypass mode. The muting circuit has a time constant of 2.5 seconds, so there is always a 2.5 second delay when un-muting the output. The FM tuner bypass switch is shown on this sheet (SW2) and is accessed from the front of the unit. Micro, DAB

7、 module, SPDIF Z204 is a Hitachi H8/3048F 16 bit microcontroller. It has FLASH program memory, and is programmed via header SK1. Z202 is a 64kbit parallel EEPROM used for storing multiplex data. this is where the system stores data about the multiplexes it finds when it does a search, and other info

8、rmation (presets, compression level, sort type, display mode). Z205 is a 3 pin reset generator IC. SW1 is a latching push switch accessed from the rear of the unit. If the switch is pushed in, RDI_ON will be low. This has the effect of removing data services from the list of services. If the switch

9、is left out, RDI_ON will be high and the data services can be seen. SK3 is used to connect to the front panel, communication is done via the I2C bus. Power for the front panel comes in the form of P7V5_UR. Note that although P5V connects to the front panel, it is not used for power. Its purpose is t

10、o light the front panel LED green. DAB module: JP1 is a 50 way SAMTEC connector which provides the interface to the Roke DAB module. All the I/O to the module is on this connector apart from the aerial input which has a cable going straight from the rear panel to the module. Communication between th

11、e micro and the DAB module is done via the serial port of each device on TX_DAB/RX_DAB. The digital audio output from the module comprise of MCLK (12.288MHz master clock), LRCK (48kHz left/right clock), SCLK (serial data clock) and SDATA (serial data). These signals go to the D-A converter, and also

12、 to the SPDIF transmitter Z201. Z201 is the SPDIF transmitter. Each one of the differential ouputs is used separately. SPDIF_OP is for the optical output, SPDIF_CX is for the coax output. DAC Z101 is a CS4327 D-A converter, followed by filter/buffer Z102. This is followed by ac coupling capacitors.

13、The relay RLY1 is the last stage before the phono output connectors. 2 stereo outputs are provided on SK101. SK102 is an input which gets routed through the relay when the relay is off. An external FM tuner can be connected to this, in order to avoid taking up an extra input on the amplifier. When t

14、he tuner is off or in bypass mode, the FM tuner is routed to the output. The digital audio outputs are also shown on this sheet. TX101 and associated components provide an isolated unbalanced SPDIF output on SK103, and Z4 produces an optical output. Software notes The system has non volatile storage

15、 in the form of the EEPROM, Z202. The following information is stored there and is remembered at power up:- Service data - all the IDs and static prog types of the services available in the ensembles found in the last search. This is the information viewed when turning the knob. Service selected - l

16、ast service selected. Display mode - prog type, dynamic label, data rate or signal quality. Display brightness - off, dim or bright. Compression level - off or 1-5. The following parameters are NOT remembered:- Engineering mode. If the unit is turned off while in engineering mode (or test mode), it

17、will default back to user mode on power up. Bypass mode - the unit will always power up not in bypass mode. Secondary services - if a secondary service is selected when it is switched off, it will power up with the parent service selected. Erasing the EEPROM - to erase the EEPROM, go into engineerin

18、g mode (SELECT +8), then hold down preset buttons 1,4,5,8. The display will say ERASING EEPROM followed by PASSED EEPROM TEST then EEPROM ERASED. If you switch the power off and on again, it will come on with all the parameters reset. Display mode - prog type Display brightness - bright Compression

19、- off. Selection Mode manual Test mode If you hold in the bypass button while powering up, this will put the unit in test mode. When the bypass button is released, the software version will be displayed. Pressing the front panel buttons will cause a message to be displayed. Turning the knob clockwis

20、e or anticlockwise will cause a message to be displayed. Any RC5 remote commands will also be displayed, with command and system codes, and an asterisk for the toggle bit. Fault mode On switch on if the Roke module is not fitted, or if there is a problem with the RX or TX communication signal betwee

21、n the module and the H8, the unit displays ERROR CIP FAILURE. DT81 Service Guide Fault diagnostics Fault Action No power Check mains fuse Check power supply rails No Audio output Check for digital output Check analogue power supply voltages Check DAC IC Fails to respond to commands Check supply volt

22、ages Check DAB module No Display Check flex foil cable Check for dry joints on micro and display Spurious display readout Check for dry joints on display board Display reads “ERROR CIP FAILURE” DAB module not communicating with main micro replace DAB module Display reads “NO SERVICE FOUND” DAB modul

23、e not receiving signal check connections to DAB module/ replace DAB module Power supply test points Position Voltage TP1 0 volt reference TP2 +5 volts - DAB module TP3 +10 volts - DAB module TP4 +5 volts - DAC TP5 +15 volts TP6 -15 volts TP7 +5 volts Hints & tips ! No analogue signal - measure betwe

24、en the junction of D10, D11 and D8, D9 for the secondary supply feed from the transformer, this should be 40 VAC. If this is low or missing the transformer will require replacing. ! Not responding to front panel controls check the processor is ok by pressing the bypass button, if the bypass relay fu

25、nctions then check the DAB module supplies are ok. If ok then replace the DAB module. ! Please note that there are no serviceable parts within the DAB module. 12345678ABCD87654321DCBAISSUEDRAWING NO.DRAWING TITLEDrawn by:DATEFilenameECO No.DESCRIPTION OF CHANGEJ:ECO_wip01_1106 new 1.7 roak moduleL91

26、8_1.1L918_1.1.DDB - L918c1_1.1.prjA & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PBDIVA DT81 DAB Tuner - Project SheetCircuit DiagramL918C1CL11-Jun-2001INITIALSDate Printed14SheetofNotes:REMOTE_BUSBYPASSBPSTBYLEDPSU & RemoteL918C2_1.1.SCHSPDIF_CXMCLKLRCKSCLKSDATAB

27、YPASSREMOTE_BUSBPSPDIF_OPSTBYLEDDAC and o/p ampL918C4_1.1.SCHLRCKMCLKSCLKSDATASPDIF_CXSPDIF_OPMicro and Gold Card I/FL918C3_1.1.SCHKit MaskFOR DT81 DAB TUNER EXCLUDE NF,DT81Tooling & Fixing HolesTooling HolesMain PCB Fixing HolesCLEARANCE HOLECHS2CHS3F3T100MASPCL03/10/00INITIAL PROTOTYPEA.0Layout by

28、CliffDD4CLOGOUpdate BoxDD3UPDATE_BOXPCBPCBL918PB_1FD_1FIDUCIALFD_2FIDUCIALFD_3FIDUCIALFD_4FIDUCIALCL22/01/01PROTOTYPE (NEW DAC & TOSLINK)B.0FIX6FIXING HOLE 3.5FIX7FIXING HOLE 3.5FIX1FIXING HOLE 3.2FIX2FIXING HOLE 3.2FIX11FIXING HOLE 3.5FIX5FIXING HOLE 3.5FIX3FIXING HOLE 3.5FIX4FIXING HOLE 3.5FIX10FI

29、XING HOLE 3.5FIX9FIXING HOLE 3.5FIX8FIXING HOLE 3.5CL19/03/01PRODUCTION RELEASE1.0CHS401_1076PG8/6/01ROKE MODULE V1.7 + changed R67 & R681.101_110612345678ABCD87654321DCBAISSUEDRAWING NO.DRAWING TITLEDrawn by:DATEFilenameECO No.DESCRIPTION OF CHANGEJ:ECO_wip01_1106 new 1.7 roak moduleL918_1.1L918_1.

30、1.DDB - L918C2_1.1.SCHA & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PBDiVA DT81 DAB Tuner - Power Supplies & MutingCircuit DiagramL918C2CL11-Jun-2001INITIALSDate Printed24SheetofNotes:F1T160MA+C103M3 ELVinIADJAVoutOZ2LM317TD31N4003FDAC SupplyR183R3 FUR193R3 FUVin

31、IADJAVoutOZ3LM317TVinIADJAVoutOZ5LM337T+C21100U EL+C22100U ELD41N4003FD51N4003FVinIGNDGVoutOZ77805P15VN15VP10V P5VDABP5V DACNLSK4IEC2LIVE1NEUT1PUNREG1NUNREG1N15VP15VP2P3P5AGND1GND1ACAUD1ACAUD2ACAUDG1ACDIG1ACDIG2NEUT2AC115VAC230VHSHS2ATO220HS08REGTP1TEST_POINTTP2TEST_POINTTP4TEST_POINTTP5TEST_POINTTP

32、6TEST_POINT115V units only230V units onlyF2T250MA115V!WARN!WARN!WARN!WARN1342T2CM_CHOKE!WARN!WARN!WARN123SW3AA1014456SW3BA1014LIVENEUTLIVE2NEUT2+C201M0 25VP15VD8UF4003D9UF4003D10UF4003D11UF4003D12UF4003D13UF4003D14UF4003D15UF4003115V230VR201R0 FUR211R0 FUPWR1IN12IN230V4V-5O6FB7RC8V+9Z9TA7317P+C341U0

33、 EL-UR+UR+C23100U EL+C351U0 ELD16UF4003789SW3CA1014RLY1CRLY 51SB12TD171N4148P15VMUTE1Analogue and Digital grounds are joined at the DAC, Z10MUTE CIRCUITPOWER SUPPLIES+C371M0 35V+C381M0 35V+C391M0 35V+C401M0 35V+URConnect ground to chassis fixing via decoupling capacitor C32.+C1410U ELP5VFM Tuner Pas

34、s-throughNear to PCBSK5AJACK3.5X2Far from PCBSK5BJACK3.5X2D184V7 400MW321Z10ALM393A SM567Z10BLM393A SMC41680P PPL127MH84Z10CLM393A SMP5VQQ1QPADQQ2QPADQQ3QPADQQ4QPADQQ5QPADP5VREMOTE_BUS101112SW3DA1014VinIGNDGVoutOZ87805+C28100U ELP7P5V+5V for DAB+5V for microTP7TEST_POINTBYPASS-UR12345678910SK6FFC10V

35、-URN15V+URP15VP7V5_URP5VMUTE1MUTE1BPACAUD1ACAUD2ACDIG1HS3ATO220HS30REG171617230V115V111822201413215612280V1915232418V0V18V7V50V12V0VT1L848TXACDIG2VinIADJAVoutOZ1LM317T+C1110U ELD21N4003FDAB Module Supply +10VHS1ATO220HS30REGTP3TEST_POINTACDIG3ACDIG4ACDIG3ACDIG4D6UF4003D7UF4003D19UF4003D20UF4003+C293

36、M3 ELP8P9EMCGNDEMCGND+C27220U EL+C24220U ELP7V5_URT1T2T3T41234SK12IDC4SEMCGND+C12100U EL+C13100U ELC621N0 PPC631N0 PP+C26220U EL+C2522U ELC3310N SM+C19100U ELR621R0 FUR721R0 FUR731R0 FUR741R0 FUCHS2REMIN1REMIN2CL03/10/00INITIAL PROTOTYPEA.0R22100R 1W CF(NOT FITTED ON DT81, USES SWITCH ON DISPLAY BOA

37、RD)123SW2A2PCO_NON_LAT456SW2B2PCO_NON_LATSTBYLEDCL22/01/01PROTOTYPE (NEW DAC & TOSLINKB.0CL19/03/01PRODUCTION RELEASE1.0R7710K 0805R3010K 0805R7110K 0805R3310K 0805R2947K 0805R3247K 0805R3147K 0805R2847K 0805R3447K 0805R7047K 0805R25100R 0805R241K8 0805R128K2 0805R138K2 0805R2733K 0805R7622R 0805R58

38、2K7 0805 0.1%R411K0 0805R421K0 0805R444K7 0805R310K 0805R410K 0805R610K 0805R510K 0805R531K8 0805R521K8 0805R511K5 0805 1%R17390R 0805R56220R 0805R57220R 0805R542K4 0805 1%R552K4 0805 1%R431K0 0805R16330R 0805R49100K 0805R50100K 0805R260R0 0805C64470P NPO 0805C60470P NPO 0805C61470P NPO 0805C65470P

39、NPO 0805C3210N 0805C5910N 0805C36100P NPO 0805C42100P NPO 0805C5010N 0805C55470P NPO 0805C5110N 0805C31220N X2 CLASS01_1076PG8/6/011.101_1106ROKE MODULE V1.7 + changed R67 & R6812345678ABCD87654321DCBAISSUEDRAWING NO.DRAWING TITLEDrawn by:DATEFilenameECO No.DESCRIPTION OF CHANGEJ:ECO_wip01_1106 new

40、1.7 roak moduleL918_1.1L918_1.1.DDB - L918C4_1.1.SCHA & R Cambridge Ltd.Pembroke AvenueDenny Industrial CentreWaterbeachCambridge CB5 9PBDiVA DT81 DAB Tuner - micro circuitCircuit DiagramL918C4CL11-Jun-2001INITIALSDate Printed34SheetofNotes:SPDIF_OPP10VP5VDABMCLKLRCKSCLKSDATAMDD1BAS16W SMP5VP5VP5VP5

41、VX116MHZ#AMDRDI InterfaceS/PDIF TransmitterDAB Module ConnectorEEPROMReprogramming InterfaceP5VP5VBYPASS12345678910111213141516171819202122SK3FFC22VTo Display PCBP7V5_URP5VP5VP5VDecoupling for ICsZ204Z202Z203Z205REMOTE_BUSP5VP5VnREQP_mode123SW1A2PCO456SW1B2PCOP5VnResetSCLSDASCLSDAnResetnResetnResetV

42、cc2Res3Gnd1DS1233Vcc4Z205DS1233MP5VQ2ZVNL120Q3ZVNL120Q1ZVNL1201234567891011121314SK1HEADER 7X2Vcc1PB02PB13PB24PB35PB46PB57PB68PB79Vpp/RESO10Vss11TxD0/P9.012TxD1/P9.113RxD0/P9.214RxD1/P9.315IRQ4/SCK0/P9.416IRQ5/SCK1/P9.517D0/P4.018D1/P4.119D2/P4.220D3/P4.321Vss22D4/P4.423D5/P4.524D6/P4.625D7/P4.726D8

43、/P3.027D9/P3.128D10/P3.229D11/P3.330D12/P3.431D13/P3.532D14/P3.633D15/P3.734Vcc35A0/P1.036A1/P1.137A2/P1.238A3/P1.339A4/P1.440A5/P1.541A6/P1.642A7/P1.743Vss44A8/P2.045A9/P2.146A10/P2.247A11/P2.348A12/P2.449A13/P2.550P2.6/A1451P2.7/A1552P5.0/A1653P5.1/A1754P5.2/A1855P5.3/A1956Vss57P6.0/WAIT58P6.1/BRE

44、Q59P6.2/BACK60CLKOUT61STBY62RES63NM164Vss65EXTAL66XTAL67Vcc68P6.3/AS69P6.4/RD70P6.5/HWR71P6.6/LWR72MD073MD174MD275AVcc76Vref77P7.0/AN078P7.1/AN179P7.2/AN280P7.3/AN381P7.4/AN482P7.5/AN583P7.6/AN6/DA084P7.7/AN7/DA185AVss86P8.0/IRQ087P8.1/IRQ188P8.2/IRQ289P8.3/IRQ390P8.4/CS091Vss92PA093PA194PA295PA396P

45、A497PA598PA699PA7100H8/3048FZ204H8/3048F1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950JP150 W SKTA010A19A28A37A46A55A64A73A825A924A1021A1123A122RB1WE27CE20OE22VCC28VSS14NC26DQ011DQ112DQ213DQ315DQ416DQ517DQ618DQ719Z202M28C64AA1A0A2A3A4A5A6A7A8A9A10A11A12A0

46、A1A2A3A4A5A6A7A8A9A10A11A12P5VRDISCLSDAREMOTERESETnREQBYPASSRDI_ONPMODERXD1TXD1VPPMDPA4PA5PA6PA7BP12345SK2IDC5S12SK8IDC2S123456SK9IDC6S12SK11IDC2S123Z6A74HC32 SM456Z6B74HC32 SM9108Z6C74HC32 SM121311Z6D74HC32 SMVDD14GND7Z6E74HC32 SMP5VnREQD0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7P5VMCLK_SPLRCK_INP5VR4033R MFR

47、4533R MFC7/C31PRO2C1/FC03C6/C24MCK5SCK6FSYNC7SDATA8V9C/SBF10U11C9/C1512EM1/C813EM0/C914CBL/SBC15RST16TXN17Gnd18Vd+19TXP20M021M122M223TRNPT/FC124CS8402AZ201CS8402AL22U2H AXL32U2H AXSPDIF_CXSPDIF_OPCHS3CHS3CHS3CHS3CHS3L433UH AX12345SK10IDC5S12435Z1174AHC1G00 SMQ4ZVNL120P5VFPRESETTXD_DABRXD_DABRBUSFPCH

48、S2CHS3LRCKMCLKSCLKSDATAP5VDABP10VP9V9GNDMODDISPGNDP7V5DISPVPLL1_VPLLTEST_POINTVPLLTEST_LOOPL51U0H SMCL03/10/00INITIAL PROTOTYPEA.0DAB TUNER MODULEM1DAB TUNER MODULEBYPASSBYPASSSTBYLED231VCCGNDI/PZ203GP1FA550TZCL22/01/01PROTOTYPE (NEW DAC & TOSLINK)B.0123LK1MOLEX3MVCL19/03/01PRODUCTION RELEASE1.0R210

49、K 0805R1010K 0805R392K2 0805R710K 0805R110K 0805R7510K 0805R142K2 0805R152K2 0805R910K 0805R63100R 0805R78100R 0805R65100R 0805R66100R 0805R64100R 0805R61100R 0805R46100R 0805R47330R 0805R601K0 0805R481K0 0805R67100R 0805R6910R 0805C610N 0805C710N 0805C810N 0805C910N 0805C1810N 0805C66470P NPO 0805C

50、67470P NPO 0805C68470P NPO 0805C69470P NPO 0805C4410N 0805C4310N 0805C1710N 0805C510N 0805C410N 0805C310N 0805C70100P NPO 0805C7247P NPO 0805C71100P NPO 0805C52100P NPO 0805C53100P NPO 0805C54100P NPO 0805C47100P NPO 0805C48100P NPO 0805C45100P NPO 0805C46100P NPO 0805C49100P NPO 0805C222P NPO 0805C