Service Manual AV8 Issue 2.
Contents List Section Issue Manual Updates ! Service Manual changes issue 1.0 to 2.0 - Technical specifications ! ! ! Front & rear view diagram Dimension diagram Specification - Service guide ! ! ! Engineering Mode AV8 Programmer software AV8 Loader software - Build Sequence ! How to assemble the AV8 - Phono board L870 ! ! ! ! Circuit description Component overlay Parts list Circuit diagrams 2 2.0 2.
Manual Updates Service Manual changes issue 1.0 to 2.0 L896 Digital Board 02_E101 IC906 EEPROM changed from 5G24LC08 to 5G24LC16 Parts list updated to issue 1.
Technical Specifications Contents ! Front & rear view diagram ! Dimensions diagram ! Specifications
THX SURROUND EX AV8 PREAMP PROCESSOR DESIGNED & MADE IN THE UK BY:A & R CAMBRIDGE, WATERBEACH, CB5 9PB.
Technical Specifications Audio Line input sensitivity (set to Reference) Input impedance Preamp output level (nominal) Output impedance Signal/noise ratio (unwtd 20Hz –20kHz)– analogue Signal/noise ratio (unwtd 20Hz –20kHz)– digital (24-bit) THD+N – analogue THD+N – digital (24-bit) Headphone maximum output level into 600 ohm Output impedance Video inputs and outputs Input and output impedance Composite video level HF response to (–3dB) S-video level (Y/C) HF response to (–3dB) HQ (component) video level (Y
Service Guide Contents ! Engineering mode ! AV8 Programmer software ! AV8 Loader software
Restore Defaults This allows you to reset the AV8 to the factory default settings. AV8 Engineering Mode To access the software versions simultaneously press OK, DVD & CD on the front panel. The software versions will be displayed on the OSD. AV8 Version: 2.0 THX Ul2: 13.0 Dolby D: 16.0 Plogic 2 : 4.0 DTS –ES: 15.0 DTSNeo6: 18.0 Cos Eff : 15.
AV8 Programmer AV8 Loader (Preset Backup) Future software upgrades can be installed via the RS232 port on the back of the AV8. The following equipment will be required: The AV8 Loader utility allows the unit settings to be either downloaded from or uploaded to the AV8.
Build Sequence Contents ! How to assemble the AV8
1. 2. Assemble the damping plate to chassis floor. Screw through from underneath the chassis and thoroughly degrease the chassis floor before assembling the damping plate. See FIG1. Part No. E816CH E873MC Description Chassis Damping Plate HE6V06B Self-tapping No6x6mm Pan Torx-Slot Steel Zinc-Plate Black Part No.
FIG1
FIG2
FIG3
FIG4
FIG5
8. Fit the video board (L922AY – main board) to the chassis (do not fit rear panel yet). Ensure the board is pushed to the back of the chassis before tightening down the board. Use the H041 pillars in the two holes closest to the S-video connectors (right hand side nearest the EMC screen as viewed from the connector side). See FIG6. Part No.
FIG6
FIG7
FIG8
Connect the cable assemblies listed below. 15. Fit the digital PCB (L896AY) such that the notch in the board is by the headphone board. Once the pcb is in place, fit the cables below. See FIG9. Part No.
FIG9
FIG10
FIG11
FIG12
Phono Board L870 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Phono Board Circuit Description Refer to circuit diagram L870 sheet 1 The phono board is a simple single stage RIAA amplifier and consists of two channels of high gain amplification, and the ability to switch between moving magnet (MM) and moving coil (MC) settings. PSU The unit derives its + 15V regulated rails from the unit it is fitted into with only local decoupling capacitors on board. Interface The unit connects to the host unit via a 8 way connector.
L870 Phono Board Parts List Issue 2.
L870 Phono Board Parts List Issue 2.
1 2 3 4 5 6 8 7 D D C C Q_1 SK1 PHONO2HG LEFT CHANNEL L870C2_2.0.SCH LEFT IN +15V Q_3 LEFT OUT EMC C1 100N CD SK2 Q_5 1 0V_SIG Q_2 RIGHT CHANNEL L870C3_2.0.SCH RIGHT IN Q_4 Q_6 RIGHT OUT 0V_SIG 1 2 3 4 5 6 7 8 AMPCT8 Q_7 -15V 0V_SIG Q_8 0V_HF B A B PCB1 DRAWING TITLE EL1 PCB L870PB_2 A A85 PHONO STAGE - TOP LEVEL Update Box 23425 UPDATE_BOX Circuit Diagram Notes: 01_1070 JAG 17/4/01 A & R Cambridge Ltd.
1 2 3 4 5 6 8 +15V Q_102 + 7 C102 100U SILMIC C104 100N PE C119 D R100 330R MF 0V_HF R101 100R MF 100P PP D 0V_SIG R102 100R MF C101 TR100 BC556B TR102 BC556B 1N0 PP TR103 BC556B C110 TR101 BC556B + C100 22U EL 4N7 PP C120 1N0 PP C112 R109 12K MF TR108 BC546B 10N PP AX C111 R115 R110 12K MF 15K MF 10N PP AX LEFT IN C105 100N PE 7 TR107 2SA1085 R111 Q_101 1U0 PE R108 47K MF 10 C109 100P PPW 11 SW100D 4PCO R105 100R MF 0V_SIG R119 22R MF R117 C118 6 R122 39K MF
1 2 3 4 5 6 8 +15V Q_202 + 7 C202 100U SILMIC C204 100N PE C219 D R200 330R MF 0V_HF R201 100R MF 100P PP D 0V_SIG R202 100R MF C201 TR200 BC556B TR202 BC556B 1N0 PP C210 TR203 BC556B TR201 BC556B 4N7 PP C220 + C200 22U EL 1N0 PP C212 R209 12K MF TR208 BC546B 10N PP AX C211 R215 R210 12K MF 15K MF 10N PP AX RIGHT IN C205 100N PE 2 3 1 7 Q_201 56K MF 1U0 PE IC200 3 C218 10U NP R213 100K MF TR204 BC556B 100P PPW R205 100R MF 0V_SIG 0V_SIG TR205 BC556B 9 8 7 C209
Digital Board L896 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Digital Board Introduction Refer to circuit diagram L896 sheet 1 The AV8 digital board is the heart of the AV8 surround sound decoder. It includes the H8S system control micro, the RS232 interface chip, the two Crystal DSPS one used for the surround sound decoding the other for THX post processing, a SPDIF receiver, four DACS, the bass redirection multiplexers and one ADC along with the associated support circuits and Power supply.
SK1000 Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 P18V AGND N18V P21V AGN N21V SK1001 Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 Pin7 Pin8 P12V DGND N12V DGND P5V DGND P3V3 DGND SK1002 Pin1 Pin2 Pin3 Pin4 PSU SYNC PSU GOOD PSU KILL DGND SK1003 Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 Pin7 P36VF1 0VF1 P36VSET P5VF2 OVF2 P5VF2SET N/C ADC Refer to circuit diagram L896 Sheet 2 The signals to the ADC are converted to balanced by the three opamps that also correct the level to the input of the ADC so that 2VRMS on the input of the first opam
The signal arrives at the first DSP either on the SPDIF I2S DATA line from the digital inputs or on ADC DATA 3.3V for analogue inputs. The SPDIF chip generates the clocks for its interfaces, and the master clocks as it is the system master. The ADC generates its own bit clock and word clock from the master clock it receives from the ADC. When the ADC is in use the master clock is generated by an 11.2896MHz crystal attached to the SPDIF receiver (IC803).
Power Supply Refer to circuit diagram L896 Sheet 10 The power supply sheet contains the connectors from the power supply. SK1003 display supply. SK1000 Analogue supply. SK1001 Digital Supplies. SK1002 Power supply control. Each of the supplies that is used passes through a LC filter to reduce any noise in both directions i.e. noise coming in from the switched mode supply or noise getting out from the noise on the digital board.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.
L896 Digital Board Parts List Issue 1.6 Designator Part Description R302 R303 R304 R305 R306 R307 R308 R309 R311 R312 R313 R314 R315 R316 R317 R318 R319 R325 R326 R327 R336 R400 R401 R402 R403 R404 R405 R406 R407 R408 R409 R411 R412 R413 R414 R415 R416 R417 R418 R419 R425 R426 R427 R436 R437 R500 R501 R502 R503 R504 R505 R506 R507 R508 R510 R511 R512 R513 R514 R515 R516 R517 Resistor 0805 Surface Mount 0.125W 1% 2K2 Resistor 0805 Surface Mount 0.125W 1% 2K2 Resistor 0805 Surface Mount 0.
L896 Digital Board Parts List Issue 1.6 Designator Part Description R518 R519 R525 R526 R527 R536 R537 R600 R601 R602 R603 R604 R605 R606 R607 R608 R610 R612 R613 R614 R615 R616 R617 R618 R619 R620 R625 R626 R627 R636 R637 R700 R701 R702 R704 R707 R708 R709 R710 R711 R712 R715 R717 R718 R719 R720 R724 R725 R726 R727 R736 R737 R738 R800 R801 R802 R803 R808 R820 R821 R822 R823 Resistor 0805 Surface Mount 0.125W 1% 1K0 Resistor 0805 Surface Mount 0.125W 1% 1K0 Resistor 0805 Surface Mount 0.
L896 Digital Board Parts List Issue 1.6 Designator Part Description R824 R825 R826 R827 R828 R831 R832 R833 R834 R836 R837 R838 R900 R901 R902 R903 R904 R905 R906 R907 R908 R909 R910 R911 R912 R916 R917 R918 R919 R920 R921 R1000 R1001 R1002 R1003 R1004 R1005 R1006 R1007 R1008 R1009 R1010 R1011 R1012 R1013 R1014 R1100 R1101 R1102 RP200 RP700 RP701 RP702 RP705 RP706 RP900 RP1100 RP1101 RP1102 SK100 SK102 SK103 Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.
L896 Digital Board Parts List Issue 1.6 Designator Part Description SK801 SK900 SK901 SK902 SK903 SK1000 SK1001 SK1002 SK1003 SK1100 SK1101 X2 X800 CON CT SERIES VERTICAL 5WAY CON 1.00MM VERTICAL SM FFC 30WAY CON 1.00MM VERTICAL SM FFC 30WAY CON 1.00MM VERTICAL SM FFC 22WAY CON CT SERIES VERTICAL 8WAY CON CT SERIES VERTICAL 6WAY CON CT SERIES VERTICAL 8WAY CON CT SERIES VERTICAL 4WAY CON CT SERIES VERTICAL 7WAY CON CT SERIES VERTICAL 8WAY CON CT SERIES VERTICAL 8WAY Crystal 24.576MHz HC49 Crystal 11.
AV8 DIGITAL BOARD DD DSP AVD DD DSP.sch ADC AVD ADC.SCH TO ANALOGUE BOARD SK100 AUDIO_GROUND BASS C SUB OFF REDIRECT BASS BASS LS BASS RS MICRO AVD MICRO.sch 100PX4 SM 100PX4 SM 100PX4 SM C109C C109D DACL C109B 100PX4 SM 100PX4 SM C103D C103C 100PX4 SM 100PX4 SM 100PX4 SM C110D CHASSIS 5 TO ANALOGUE BOARD SK103 1 2 3 4 5 6 7 8 DAC LSRS REDIRECT BASS BASS LSB BASS RSB DAC LSBRSB 100PX4 SM FIX5 FIXING HOLE 4.
P5VA D200 BAV99W DUAL SM C228 P5VA AUDIO_GROUND D201 BAV99W DUAL SM 100U NP R218 R208 R201 5K1 0805 1% 4K7 0805 2K2 0805 1% C202 R219 5K1 0805 1% 47P NPO 0805 AGND 2 7 5 R212 47R 0805 P3V3A OPA2134PA SM 11 C208 100N 0805 C210 100N 0805 + C221 10U EL SG C212 100N 0805 47P NPO 0805 AGND 2 P3V3A 47R 0805 6 OPA2134PA SM 25 AINR+ 24 AINR- + C222 10U EL SG C213 100N 0805 1 2 3 4 ADC DATA ADC I2S SCLK ADC I2S LRCLK 100R X 4 ISO ADC I2S MCLK ADC HS ADC HS P3V3A VCOMR 28 VREFR 27
10U EL SG C305 + AGND C333 100N 0805 R314 P5VA 4K7 0805 C336 C323 100N 0805 R300 R308 3K3 0805 1% C340 2N2 PP DAC RESET DAC RESET 33P NPO 0805 680R 0805 1% AGND C300 330P NPO 0805 R304 3K3 0805 1% IC304B C342 680P PP 5 IC301B OPA2134PA SM 5 R316 7 R325 7 6 6 DAC C DAC C 47R 0805 4K7 0805 OPA2134PA SM AGND DAC MUTE DAC MUTE C343 DM0 DM0 DM1 DM1 R301 R309 3K3 0805 1% 680R 0805 1% DAC GND C 680P PP C341 2N2 PP R305 P3V3D_CS R318 3K3 0805 1% DAC GND C 1K0 0805 IC303A
10U EL SG C409 + AGND C433 100N 0805 R414 4K7 0805 C436 R404 3K3 0805 1% 680R 0805 1% P5VA DAC RESET DAC RESET R412 C440 2N2 PP R400 3K3 0805 1% 33P NPO 0805 IC404B C442 680P PP R411 7 R425 7 C400 330P NPO 0805 C419 5 IC403B 5 6 6 DAC L DAC L 47R 0805 4K7 0805 OPA2134PA SM AGND DAC MUTE DAC MUTE OPA2134PA SM C443 100N 0805 DM0 DM0 DM1 DM1 R413 R405 3K3 0805 1% DAC GND L 680R 0805 1% 680P PP C441 2N2 PP P3V3D_LR R401 R418 3K3 0805 1% IC401A P5VA IC402 WM8740 R408
10U EL SG C509 + AGND C533 100N 0805 R514 4K7 0805 C536 R512 R504 3K3 0805 1% 680R 0805 1% C540 2N2 PP DAC RESET DAC RESET P5VA R500 3K3 0805 1% 33P NPO 0805 IC505B C542 680P PP R511 7 R525 7 C500 330P NPO 0805 C520 5 IC502B 5 6 6 DAC LSB DAC LSB 47R 0805 4K7 0805 OPA2134PA SM DAC MUTE DAC MUTE DM0 DM0 DM1 DM1 AGND 100N 0805 OPA2134PA SM C543 R513 R505 3K3 0805 1% 680R 0805 1% DAC GND LSB 680P PP C541 2N2 PP R501 P3V3D_LSBRSB R518 3K3 0805 1% IC503A P5VA IC501 WM8
C609 + AGND 10U EL SG C633 100N 0805 R616 4K7 0805 C636 R604 3K3 0805 1% 680R 0805 1% P5VA DAC RESET DAC RESET R612 C640 2N2 PP 33P NPO 0805 R600 3K3 0805 1% IC605B C642 680P PP 7 R625 7 C600 330P NPO 0805 C619 5 IC604B 5 6 6 R617 DAC LS DAC LS 47R 0805 4K7 0805 OPA2134PA SM DAC MUTE DAC MUTE DM0 DM0 DM1 DM1 AGND OPA2134PA SM C643 100N 0805 R613 R605 3K3 0805 1% DAC GND LS 680R 0805 1% 680P PP C641 2N2 PP P3V3D_LSRS R601 R619 3K3 0805 1% P5VA IC602 WM8740 IC601A
R715 DSP2 BCLK 100R 0805 R712 RP701 10K X 4 ISO DSP2 LRCLK 100R 0805 P2V5D 8 7 6 5 P2V5D DGND CP700 100P X 4 ISO 8 7 6 5 8 7 6 5 DGND C703 220P NPO 0805 DSP_D7 DSP_D6 DSP_D5 DSP_D4 4 3 2 1 DSP_D3 DSP_D2 DSP_D1 DSP_D0 4K7 0805 1 2 3 4 C705 5 6 7 8 RP706 2U2 EL FILT1 33 R727 180K 0805 P2V5D C706 220P NPO 0805 C707 10N 0805 P2V5A2 10K X 4 ISO DGND R719 10K 0805 1% DGND DGND DGND R726 10K 0805 1% DGND DGND P3V3D P3V3D P3V3D L708 P3V3D 70R@100MHz IC708 7F004 C734 100N 080
SPDIF RCVERR SK801 1 2 3 4 5 AMPCT5 DGND P5VD L801 33UH SM C802 + DGND R820 1K2 0805 1% 10U EL C821 4N7 0805 100V C818 100N 0805 C820 100N 0805 L802 R822 10 GND 1 1OE 19 2OE R836 1 18 16 14 12 3 5 7 9 R823 DGND 2 3 4 DAC I2S MCLK LSRS DAC I2S MCLK LSBRSB DAC I2S MCLK LSBRSB DGND 33R 0805 R825 33R 0805 R826 R824 33R 0805 R832 R833 33R 0805 DAC I2S MCLK LR DAC I2S MCLK CS DAC I2S MCLK CS ADC I2S MCLK ADC I2S MCLK 33R 0805 R802 33R 0805 74LVC244AD SPDIF I2S BCLK SPDIF I2
4 P3V3D Q 5 FWE = 0 (NORMAL) = 1 (BOOT PROGRAM) FWE P3V3D 10 SD 6 MD2 = 1 (NORMAL) = 0 (BOOT PROGRAM) Q IC908B D R901 74LV74 SM DGND 9 MD2 SD CLK CPU24.
P36VF1 SK1003 1 2 3 4 5 6 7 P5VD P36VF1 0VF1GND P36VSET P5VF2 0VF2GND P5VF2S SPEED SELECT FOR PSU SYNC R1008 33K 0805 R1010 10K 0805 Q1000 P5VF2 100K 0805 P36VF1 0VF1 P36VSET P5VF2 OVF2 P5VF2SET R1007 AMPCT7 VFD EHT R1002 L1006 0R0 0805 PSUCHSS C1000A 1000PX4 SM C1005A 1000PX4 SM C1005B 1000PX4 SM C1005C 1000PX4 SM C1005D 1000PX4 SM 70R@100MHz DGND PSUCHSS PSUCHSS Sample Rate PSU SYNC 32KHz + 24KHz 44.1KHz +48KHz 96KHz + 88.2KHz 192KHz + 176.4KHz no sync sent 88.
R1100 PSU SYNC BCLK PSU SYNC BCLK 100R 0805 L1101 70R@100MHz P3V3D IC1100 IC1102 R1101 100R 0805 1% R1102 CP D0 D1 D2 D3 D4 D5 Q0 Q1 Q2 Q3 Q4 Q5 2 5 7 10 12 15 100R 0805 1% 2 4 6 8 17 15 13 11 1A0 1A1 1A2 1A3 2A0 2A1 2A2 2A3 1Y0 1Y1 1Y2 1Y3 2Y0 2Y1 2Y2 2Y3 18 16 14 12 3 5 7 9 1 2 3 4 8 7 6 5 RP1101 DGND 100R X 4 ISO DGND 8 7 6 5 1 2 3 4 100R X 4 ISO RP1100 74LVC244AD C1103 100N 0805 DAC I2S BCLK LR DAC I2S BCLK CS DAC I2S BCLK LSRS DAC I2S BCLK LSBRSB DAC I2S LRCLK LR DAC I2S LRCLK CS
Power Supply Board L897 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Power Supply Board The 40W Resonant supply is designed to produce extremely low levels of conducted and radiated noise. The supply is based around a discontinuous inductor current single ended flyback topology with active clamp. The active clamp eliminates the power losses normally associated with RCD type clamps and also eliminates the high voltage ringing waveform normally present on the primary inductance.
Overcurrent Protection Figure 2 A number of mechanisms protect the PSU in the event of a short circuit or very high load being placed on one of the outputs. These waveforms are for a non resonant ordinary discontinuous flyback supply to illustrate the operation of the circuit. The drain waveform starts at the voltage on the input capacitor C35 and falls to near zero when the mosfet is switched on.
Figure 1 LIVE Input Filter and Rectifier NEUTRAL C35 L1 250U 100UF 400V EARTH 31DQ10 DO-201AD Cout 2200UF 16V YXF DGND M2 MTP6N60E TO-220 GDRV PRIMARY CONTROLLER Isns DC FEEDBACK SYNC PULSE SHUTDOWN R30 0R22 0W25 MF DGND 1 6 SECONDARY SIDE CONTROLLER 5 PRIMARY SIDE FEEDBACK BLOCK Figure 2 M2 Drain Gate Drive Primay Current Dout Current 2 4 IC2
L897 Power Supply Parts List Issue 4.1 Designator Part Description BR1 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 Diode Bridge Rectifier GBU4K Plastic Package 4A 800V Capacitor X1 Y2 RATED Ceramic 7.5mm Pitch 3N3 250V Capacitor X2 Boxed Polypropylene 22.5mm Pitch 275V 220NF Capacitor X2 Boxed Polypropylene 22.
L897 Power Supply Parts List Issue 4.
L897 Power Supply Parts List Issue 4.1 Designator Part Description L5 L6 L7 L8 L9 M1 M2 M3 PB1 PK1 PL10 PL11 PL12 PL13 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 R45 R46 R47 R48 Inductor 33UH 10% Inductor 33UH 10% Inductor 33UH 10% Inductor 33UH 10% CHOKE MAINS COMMON MODE 7.
L897 Power Supply Parts List Issue 4.1 Designator Part Description R49 R50 R51 R52 R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 REG1 REG2 SK1 SK2 SK3 SK4 SK5 SK6 SK7 SK8 SK10 SK11 SK12 SK13 SW1 TH1 TR1 TR2 TR3 TR4 TR5 TR6 TR7 TR8 TR9 TR10 TR11 TR12 TR13 TX1 Resistor Metal Film 0.25W 1% 2K2 Resistor Metal Film 0.25W 1% 6K8 Resistor Metal Film 0.25W 1% 10K Resistor Metal Film 0.25W 1% 16K Resistor Metal Film 0.25W 1% 4R7 Resistor Metal Film 0.25W 1% 22K Resistor Metal Film 0.
P21 SCOPE POINT D5 P25 SCOPE POINT L5 13B 6 R1 1M5 VR25 NF 3 C2 220N X2 CLASS C3 220N X2 CLASS 1 4 - + 1 TH1 THERMISTOR 25R 3A ~ CM_CHOKE 1.5MH C81 3N3 MAINS PCB NET LINK M1G 3 M1 MOSFET MTP6N60E C5 24T 1 UF5403 C74 C CER 470PF 1KV + C38 1000U 35V LOW Z 20T 4 20T 2 2 100N PE R4 1K0 MF PGND1 D1 15V 400MW P2 SCOPE POINT 24T PGND2 PD1 MTG PAD 3.
Display Board L898 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Display Board Refer to circuit diagram L898 sheet 1 Introduction The AV8 display board contains the front panel graphical VFD display module, buttons, LEDs, remote IR receiver and encoder. The graphical VFD display receives data directly from the micro on the digital board (via SK100). Power Supply The supply rails are supplied to the Display PCB Via SK100 from the digital board.
L898 Display Board Parts List Issue 1.
L898 Display Board Parts List Issue 1.2 Designator Part Description Q101 R100 R101 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 RP100 RP101 RX101 SK100 SP1 SP2 SP3 SW100 SW101 SW102 SW103 SW104 SW105 SW106 SW107 SW108 SW109 SW110 SW111 SW114 SW115 SW116 SW117 SW118 SW124 Transistor BC847B SOT23 Package Resistor 0805 Surface Mount 0.
1 2 3 4 5 6 8 7 SP3 LED SPACER P3V3D MUTE SW101 TACTSW SM EFFECT SW104 TACTSW SM MODE SW106 TACTSW SM OK SW108 TACTSW SM MENU SW110 TACTSW SM 14 THX SW100 TACTSW SM P3V3D R105 7 KEYB0 R100 220R 0805 Q101 BC847B Q100 BC847B + C126 100U EL SM C114 IC104G 10K 0805 R107 10K 0805 DGND R108 10K 0805 P3V3D CD SW105 TACTSW SM TUNER SW107 TACTSW SM TAPE/MON SW109 TACTSW SM R113 DIRECT SW102 TACTSW SM IND12 R114 330R 0805 DGND 330R 0805 330R 0805 C100 100P NPO 0805 PHONO/AUX SW
Audio Board L921 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Audio Board Introduction This board forms part of the AV8 Preamp Processor, it performs analogue input selection and routing of analogue signals to the various outputs. There are four sets of outputs; main, zone2 and two tape loops “Tape” and ”VCR”. Main and zone2 outputs have volume controls (either of which can be the source for the on-board headphone amplifier).
Input switching Refer to circuit diagram L921 sheet 1 The 24 off 74HCT4053 analogue multiplexers route the various analogue inputs to the four output mix buses:! ! ! ! VCR Tape Analogue Zone2 The main stereo inputs have 100pF NP0 capacitors to ground to reduce any high frequency signals radiating from the input cables which are connected to the unit. This is an EMC preventative measure.
The surround and sub channels (IC205/206/208/209) are very similar to the left channel described above except for the op-amp ground references being tied directly to 0V_SIG. External multichannel inputs (FROM EXT MAIN L, FROM EXT SURR L, etc) have 100pF NP0 capacitors to ground as an EMC preventative measure. Volume control and headphones Refer to circuit diagram L921 sheet 5,6 Volume control is performed by a Burr-Brown PGA2310 volume control chip.
LM337Ts. IC801 is a voltage regulator and is set for +15V. IC802 gives -15V and its output is also used to derive -5.1V using a Zener diode. IC803 gives a +5V supply. R806 is used to reduce the voltage drop across IC803 and therefore reduce heat dissipation in the part. General Overlay / Interconnections Refer to circuit diagram L921 sheet 9 Switch SW901 allows a “ground lift” facility. 0V_SIG is either isolated from the chassis or tied by R901 and C912 in parallel.
L921 Audio Board Parts List Issue 1.
L921 Audio Board Parts List Issue 1.
L921 Audio Board Parts List Issue 1.
L921 Audio Board Parts List Issue 1.
L921 Audio Board Parts List Issue 1.
L921 Audio Board Parts List Issue 1.
L921 Audio Board Parts List Issue 1.2 Designator Part Description R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 R146 R147 R148 R149 R150 R151 R152 R153 R154 R155 R156 R157 R158 R159 R160 R161 R162 Resistor 0805 Surface Mount 0.125W 1% 100K Resistor 0805 Surface Mount 0.125W 1% 100K Resistor 0805 Surface Mount 0.
L921 Audio Board Parts List Issue 1.2 Designator Part Description R163 R164 R165 R166 R167 R168 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R302 R303 R304 R305 R306 R307 R309 R310 R311 R312 R313 R314 R315 R401 R402 R403 R404 R405 R406 R407 R408 R409 Resistor 0805 Surface Mount 0.125W 1% 100K Resistor 0805 Surface Mount 0.125W 1% 100K Resistor 0805 Surface Mount 0.
L921 Audio Board Parts List Issue 1.2 Designator Part Description R410 R411 R412 R413 R414 R415 R416 R501 R502 R503 R504 R505 R506 R507 R508 R509 R510 R511 R512 R513 R514 R515 R516 R517 R518 R519 R520 R521 R522 R523 R524 R525 R526 R527 R528 R529 R530 R531 R532 R533 R534 R535 R536 R537 R538 R601 R602 R603 R604 R605 R606 R607 R608 R609 R610 R611 R612 R613 R614 R615 R616 R617 Resistor 0805 Surface Mount 0.125W 1% 100K Resistor 0805 Surface Mount 0.125W 1% 47R Resistor 0805 Surface Mount 0.
L921 Audio Board Parts List Issue 1.2 Designator Part Description R618 R619 R620 R621 R622 R623 R624 R625 R626 R627 R628 R629 R630 R701 R702 R703 R704 R705 R706 R707 R708 R709 R710 R711 R712 R713 R714 R715 R716 R717 R718 R719 R720 R721 R722 R723 R724 R725 R726 R727 R728 R729 R801 R802 R803 R804 R805 R806 R807 R808 R810 R901 R902 R903 R904 R905 R906 R907 R908 R909 R910 R911 Resistor 0805 Surface Mount 0.125W 1% 1M0 Resistor 0805 Surface Mount 0.125W 1% 1M0 Resistor 0805 Surface Mount 0.
L921 Audio Board Parts List Issue 1.
1 2 3 4 5 6 8 7 SNAP OFF PCB VCR L MIX VCR R MIX AUXR1 AUX R 0V_SIGAU DVD IN L 1 SK902 DVDINL F N DVD IN R PHONO2G C901 1N 0805 SAT IN L F SAT IN EMC N SAT IN R PHONO2G C902 1N 0805 AV IN L F EMC N AV IN R PHONO2G AV IN L AV IN R VCRINL VCRINR VCR IN L VCR IN R TAPEINL TAPEINR TAPE IN L TAPE IN R CDINL CDINR CD IN L CD IN R TUNINL TUNINR TUNER IN L TUNER IN R 1 SW901A 2PCO AUX TO ANALOGUE DVD TO ANALOGUE SAT TO ANALOGUE AV TO ANALOGUE VCR TO ANALOGUE TAPE TO ANALOGUE
1 2 4 3 TP1 TP3 ANALOGUE L MIX ANALOGUE R MIX IC303A OPA2134PA SM IC301A OPA2134PA SM 3 2 C301 33P NPO 0805 R302 VEE 13 2 7 1 5 C 3 1Y0 1Y1 -5V 33P NPO 0805 R303 R307 30K 0805 IC304B 74HCT4053 SM 8 GND 16 VDD 4K7 0805 2Y0 15 2Z R304 2Y1 15K 0805 3Y0 R305 4 3Z 3Y1 11 1S 10 2S 9 3S 0V_SIG 14 1Z 12 13 2 1 5 100N 0805 74HCT4053 SM 3 0V_SIG 6 C310 IC304A 4K3 0805 INH 4K7 0805 30K 0805 AN-L C313 6 R309 100N 0805 C303 D 7 R313 C308 33P NPO 0805 C312 4K7 0805
1 2 4 3 IC402A 1 C402 100U NP 3 Z2V-L 2 C401 33P NPO 0805 0V_SIG C411 33P NPO 0805 R406 TL072 SM R401 1M 0805 R402 5 Z2DCAINL ZONE 2 DCA IN L ZONE 2 MIX R 0V_SIG TAPE OUTPUT R403 1M 0805 TAPEOUTR TAPE OUT R 100K 0805 R410 100K 0805 C416 100P NPO 0805 Z2DCAINR C ZONE 2 DCA IN R C406 3 IC403A R411 47R 0805 1 100P NPO 0805 0V_SIG VCR-L 2 VCR L MIX 0V_SIG TL072 SM VCROUTL C421 33P NPO 0805 C422 10U NP R412 +15V VCR OUT L IC401C 5 OPA2134PA SM C418 1N 0805 C417 100N
1 2 3 4 5 6 8 7 MAIN OUTS ENABLE +5VS 2 10K 0805 IC502A 1 3 OPA2134PA SM R527 1M 0805 R502 47R 0805 9 MAIN DCA IN R VOUTR SDO DGND R524 6 10K 0805 IC502B 7 5 13 11 R505 47K 0805 R504 47R 0805 C506 100N 0805 1N 0805 MAIN OUT L -15V 0V_SIG 0V_SIG +5V FOR OUTPUT C509 100P NPO 0805 ENABLE ANALOGUE SWITCHES ONLY C502 100P NPO 0805 C520 100U NP +5V 0V_SIG -15V_MUTE_MAIN IC507A 0V_SIG R511 MAIN L 14 1Y0 1Z 1Y1 15K 0805 + -15V 0V_SIG D501 5V1 400MW C538 100N 0805 M
1 2 3 4 5 6 8 7 MAIN OUTS ENABLE +15V_MUTE_MAIN VOUTR 11 DGND SDO IC602B 7 6 10K 0805 5 C609 100P NPO 0805 R618 1M 0805 R604 OPA2134PA SM C602 100P NPO 0805 12 13 V+ VL R622 2 10K 0805 14 7 8 6 10 9 11 R617 1M 0805 IC608A 1 C633 R611 3 10 100U NP OPA2134PA SM R624 9 SUB DCA IN VINR VOUTR C634 33P NPO 0805 R602 47K 0805 47K 0805 100U NP -15V_MUTE_MAIN R626 6 10K 0805 OUT SUB 0V_SIG R614 47K 0805 R619 1M 0805 IC608B 7 R613 5 CTROUT CENTRE OUT D603 BA
1 2 3 4 5 6 8 7 D D +5V Q702 BC856B 4 74HC14D R701 100K 0805 C703 100N 0805 74HC14D 13 AV TO TAPE 10 SAT TO TAPE 12 DVD TO TAPE SCLR OPCK AUX TO TAPE C705 100N 0805 TUNER TO TAPE OE 16 AV TO ANALOGUE 10 SAT TO ANALOGUE 12 DVD TO ANALOGUE 0V_SIG IC701C R721 5 9 C707 100N 0805 ANALOGUE TO MAIN 13 14 IC701G IC701E R704 11 10 SAT TO VCR 12 DVD TO VCR SCLR OPCK R712 4K7 0805 AUX TO VCR C706 100N 0805 OE 16 TAPE TO ZONE 2 11 SCK 14 SDI 9 SDO VCR TO ZONE 2 AV T
1 2 3 4 5 6 8 7 +5V C208 100N 0805 +15V GND 16 VDD VEE INT PROCESSOR ENABLE LINE 7 IC201B 74HCT4053 SM INT DECODER C205 1N 0805 C209 D C204 100N 0805 8 8 +15V IC203C D C206 100N 0805 -5V IC201A 15 13 R203 4 FROM EXT MAIN L 3Y0 3Y1 6 0V_SIG 5 3 3 0V_SIG 2 11 1S 10 2S 9 3S INH 0V_SIG MFVL FROM INT CENTRE 1Z 1Y1 R221 2Y0 15 2Z 2Y1 15K 0805 R205 74HCT4053 SM 1Y0 14 15K 0805 R204 1M 0805 C202 33P NPO 0805 R213 FROM INT SURR L MFV-L MAIN DCA IN L 15K 0805
1 2 4 3 +5V +5V +15V D D801 1N4003 HS801 TO220HS30REG Vout CHS2 A IC801 1000PX4 SM C805 100N 0805 +18V C807 470U EL 25V 0V_SIG AGND -18V +21V R804 2K4 0805 1% -21V AMPCT6 + IC802 I Vin Vout O C809 470U EL 25V + C811 10U EL D805 D807 1N4003 R807 390R 0805 + C813 100N 0805 R808 1K2 0805 C815 100U EL + C814 470U EL 25V C 0V_SIG 5V1 400MW R803 220R 0805 LM337T ADJ 1000PX4 SM C801C + C810 100U EL C806 100N 0805 C801D Vout O 1000PX4 SM HS802 TO220HS30REG B + C808 100
1 2 3 DVD AUX 4 SAT 5 AV 6 VCR 8 7 TAPE CD TUNER VCRLMIX VCR L MIX VCRRMIX IC101A R101 1Z 100K 0805 D IC104A 12 1Y0 14 13 1Y1 R102 2Z R103 3Z 6 3Y0 4 3Z 3Y1 100K 0805 11 1S 10 2S 9 3S INH 0V_SIG 2Z 2Y1 R111 3 3Y1 100K 0805 2Y0 15 100K 0805 5 3Y0 4 1Z 1Y1 R110 1 2Y1 100K 0805 IC107A 1Y0 14 100K 0805 2 2Y0 15 R109 6 0V_SIG 74HCT4053 SM AUX TO VCR 12 R117 13 100K 0805 2 R118 1 1Z 1Y1 15 2Y0 2Z 2Y1 R119 3 4 3Y0 3Z 3Y1 100K 0805 11 1S
Video Board L922 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Video Board Introduction The L922 board is the video and I/O board for the AV8 preamp processor. This board and its snap off contain the video multiplexing for composite, s-video and component/RGB video switching as well as two On Screen display (OSD) chips, one for the main room and one for Zone 2.
means that when the output of the OSD is switched into the output the DC level does not change avoiding any flickering or brightness changes. The Y output is clamped to 0v at its sync tip by the transistor Q301. This is an active clamp that pulls the DC level to 0v every time a sync pulse occurs. The clamp signal is created from the composite sync stripped by the OSD chip IC302 this is the shortened to a ~700nS pulse by the mono stable IC308. The time of the pulse created by IC308 is set by R310 and C304.
The S-video C and OSD C signals do not need a DC clamp as they will float to the same level due to the nature of the signal. S-Video Multiplexer Refer to circuit diagram L922 sheet 9 This contains the multiplexing for the S-Video signals. It operates in the same way as the composite multiplexer (Sheet 3 Video board) except two multiplexers are used for each signal to carry the independent Luma and Chroma signals. IC800 and IC807 carry the main feed Luma and Chroma respectively.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.
L922 Video Board Parts List Issue 3.2 Designator Part Description R204 R205 R206 R207 R208 R209 R210 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R300 R301 R302 R303 R304 R305 R306 R307 R308 R309 R310 R311 R312 R313 R314 R315 R316 R317 R318 R319 R320 R321 R336 R338 R339 R340 R341 R343 R344 R345 R346 R347 R348 R349 R350 R354 R355 R356 R357 R358 R359 Resistor 0805 Surface Mount 0.125W 1% 75R Resistor 0805 Surface Mount 0.125W 1% 36R Resistor 0805 Surface Mount 0.
L922 Video Board Parts List Issue 3.2 Designator Part Description R360 R361 R362 R363 R364 R365 R366 R367 R368 R400 R401 R402 R403 R404 R405 R406 R407 R408 R409 R410 R411 R412 R413 R414 R415 R416 R417 R418 R419 R420 R421 R422 R423 R424 R425 R430 R431 R432 R433 R434 R435 R436 R438 R439 R440 R441 R445 R446 R447 R448 R449 R450 R451 R452 R453 R454 R455 R456 R457 R458 R459 R461 Resistor 0805 Surface Mount 0.125W 1% 4M7 Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.
L922 Video Board Parts List Issue 3.2 Designator Part Description R464 R500 R501 R502 R503 R504 R505 R506 R507 R508 R509 R510 R511 R512 R513 R514 R515 R516 R517 R518 R519 R520 R521 R522 R523 R524 R525 R527 R528 R529 R530 R531 R532 R533 R534 R535 R536 R537 R538 R539 R540 R600 R601 R602 R603 R604 R605 R606 R607 R608 R609 R610 R611 R612 R613 R614 R617 R618 R619 R620 R621 R622 Resistor 0805 Surface Mount 0.125W 1% 10R Resistor 0805 Surface Mount 0.125W 1% 4K7 Resistor 0805 Surface Mount 0.
L922 Video Board Parts List Issue 3.2 Designator Part Description R623 R624 R625 R626 R627 R628 R629 R630 R631 R700 R701 R702 R703 R704 R705 R706 R707 R708 R709 R710 R711 R712 R713 R714 R715 R716 R717 R800 R801 R802 R803 R804 R805 R806 R807 R808 R809 R810 R811 R812 R813 R814 R815 R816 R817 R818 R819 R901 R902 R903 R904 R905 R906 R907 R908 R909 R910 R911 R912 R914 R915 R916 Resistor 0805 Surface Mount 0.125W 1% 0R0 Resistor 0805 Surface Mount 0.125W 1% 100R Resistor 0805 Surface Mount 0.
L922 Video Board Parts List Issue 3.2 Designator Part Description R917 R918 R919 R920 R1000 R1001 R1002 SC1 SC2 SK200 SK201 SK202 SK203 SK204 SK205 SK206 SK207 SK208 SK209 SK400 SK401 SK402 SK403 SK404 SK500 SK501 SK502 SK600 SK601 SK700 SK701 SK702 SK800 SK801 SK802 SK803 SK804 SK805 SK1000 SKP1 SKP2 SW402 X300 X301 Resistor 0805 Surface Mount 0.125W 1% 2K7 Resistor 0805 Surface Mount 0.125W 1% 1K0 Resistor 0805 Surface Mount 0.125W 1% 1K0 Resistor 0805 Surface Mount 0.
L922 AV8 Video Circuit VID TOP.SCH VID TOP.SCH REF HOLES SUB BOARD FIXINGS FIX5 FIX9 FIXING HOLE 3.5 FIX10 FIXING HOLE 3.5 FIXING HOLE 3.5 C109 1N 0805 CHASSISB FIX14 DGND FIX11 FIXING HOLE 3.2 C110 C114 1N 0805 1N 0805 FIX13 FIXING HOLE 3.5 FIX12 FIXING HOLE 3.2 C111 1N 0805 C113 1N 0805 FIX16 FIXING HOLE 3.5 FIXING HOLE 3.5 C112 DGND FIXING HOLE 3.5 FIX8 FIXING HOLE 3.5 FIX15 FIXING HOLE 3.5 FIXING HOLE 3.
L922 AV8 Video Circuit VID RGB YUV video mux VID RGB YUV video mux.SCH VID On Screen Display VID On Screen Display.
C254 NF C214 IC202 16 + 12 2U2 EL C211 5 10N 0805 C239 CHASSISA 3 IN2 Vout1 IN3 Vout2 IN4 CTL A CTL B CTL C CTL D CTL E IN5 + R200 75R 0805 C215 TP201 10P SM 0805 VGNDA 2U2 EL C240 2 + C200 1N 0805 VCR 4 2U2 EL C212 Mon Out 150R 0805 14 P5VVA MUTE 1 15 11 9 8 6 16 12 C213 7 10N 0805 C241 5 3 + R201 75R 0805 C225 2U2 EL C245 VGNDA + TP206 10P SM 0805 2 2U2 EL C217 4 CVBS O/P x2 C264 100N 0805 VGNDA C265 100U EL C216 IN1 Main CVBS MUX Mon Out IN2 Vout1 IN3
P5VV P5VV R343 4K7 0805 P5VV L304 70R@100MHz Q304 BFS17H C327 100N 0805 C329 100N 0805 VGND D300 Q302 BFS17H VGND C332 100N 0805 P5VV L305 70R@100MHz P5VV BAV99W DUAL SM VGND C347 R341 100R 0805 C362 C330 100N 0805 IC301 OSD CVBS IC302 OSD CVBS CTL A CTL B CTL C CTL D CTL E IN5 + 2U2 EL 2 R336 100R 0805 4 2U2 EL R307 75R 0805 10 VGND R321 IN4 15 11 9 8 6 NF VGND R344 GND P5VV GND Vcc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 13 + C334 100N 0805 BA7625 C344 100U EL C307 NF R349
P5VV P5VV R708 4K7 0805 C728 BFS17H C732 100N 0805 Q701 10N 0805 BFS17H R713 BAV99W DUAL SM VGND C736 C712 39R 0805 1% S-Video Out C730 R705 TP700 + BLACK CLAMP D702 Q705 Q700 DTRANN SM BLACK CLAMP 36R 0805 1% 470U EL 25V SVHS1V-TCS C701 10P SM 0805 VGND A1 SYNC TIP CLAMP + IC700 3 C719 4 SVIDEO Y + SVIDEO Y OSD C OSD C 6 10U EL C714 5 SVIDEO C SVIDEO C 100N 0805 OSD CVBS OSD CVBS 12 C720 11 Comp Video 2V + 16 1U0 EL R702 R703 R704 150R 0805 160R 0805 330R 08
P5VV P5VV P5VV R906 4K7 0805 Q902 BFS17H Q900 BFS17H Q903 100N 0805 D902 Q901 BFS17H BFS17H C911 BAV99W DUAL SM VGND C913 + IC902 3 1U0 EL 4 C912 + 6 1U0 EL R909 47K 0805 R901 47K 0805 P5VV 5 12 L900 70R@100MHz VGND Long track C902 100N 0805 VGND 11 VGND R910 C904 100N 0805 L = DIRECT = 0 330R 0805 H = OSD = 1 16 OUT1 A2 P5VV L901 70R@100MHz VGND Zone2 video OSD 2V OUT2 8 B2 A3 OUT3 9 B3 A/B 7 GND 10 GND 2 GND VGND 1 B1 C915 100P NPO 0805 VGND Long track A1 P5VV 14
P3V3 TP1000 P12V TP1007 TP1002 L1000 C1005A 1000PX4 SM C1005B 1000PX4 SM C1005C 1000PX4 SM C1005D 1000PX4 SM C1006A 1000PX4 SM C1006B 1000PX4 SM C1006C 1000PX4 SM 6U8H RADIAL L1002 DGND 100N 0805 + C1010 AMPCT8 TP1008 TP1006 P5VV 6U8H RADIAL + C1002 470U EL 25V DGND TP1009 + C1001 470U EL 25V C1007 1M0 10V DGND N12V TP1001 C1006D 1000PX4 SM TP1004 TP1003 L1001 6U8H RADIAL VGND P5V 100N 0805 + C1011 CHASSIS DGND TP1005 C1008 1M0 10V DGND C1012 100N 0805 C1013 100N 0805 C10
P5VV SC2 E869MC R520 4K7 0805 C515 100N 0805 INSERT BLACK LEVEL ON UV or BACKGROUND COLOUR (BLUE) FOR CHARACTERS ON UV E869MC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 R519 47R 0805 VGND IC501A 12 1Y0 1Z 13 2 2Z 1 3 IC504A R500 4K7 0805 C513 100N 0805 1 OSD G TTL R522 330R 0805 4 2 2 6 74HC08 SM 5 N5VV IC504B 3 CHAR OUT CHAR OUT 4 3Y1 INH OSD Y 6 2 OSD G OSD G OSD B OSD Y 1 OSD B 5 74LV4053 SM 74HC08 SM 74HCU04 SM VGND 13 3Z 11 1S 10 2S 9 3S IC502B IC500A 12 OSD R OSD
C834 VCR S-Video Out 100N 0805 C848 2U2 EL TP802 C 12 SVHS1V-TCS R808 75R 0805 1% TP800 C806 10P SM 0805 R810 75R 0805 1% 7 2U2 EL C830 C807 5 10P SM 0805 100N 0805 C858 NF VGND 3 100N 0805 C871 NF 2 4 IN1 S VID Y MUX Mon Out IN2 Vout1 IN3 Vout2 C835 R803 1 1 150R 0805 14 2 10 3 4 IN4 CTL A CTL B CTL C CTL D CTL E IN5 15 11 9 8 6 GND OUT1 IN1 OUT2 IN2 OUT3 IN3 Vcc P5VV R812 75R 0805 1% NA6 CHASSIS SVHS1V-TCS C802 1N 0805 TP806 470U EL 25V C809 10P SM 0805 C
R618 IC600A C614 10N 0805 SK600A PHONO4SPLIT EMC TR 560R 0805 1% 1Y0 1Z 1Y1 15 2Y0 2Z 2Y1 3 4 TP600 CHASSIS 3Y0 3Z 3Y1 C600 10N 0805 CD 14 TP601 1 TAPE R605 TP602 2 SK600B C615 BR (GND pin 3) PHONO4SPLIT R601 75R 0805 C624 100P NPO 0805 75R 0805 560R 0805 1% 12 1 R619 3 680K 0805 1% IC603C R620 4 13 5 IC603D 6 9 R624 8 3K3 0805 3K3 0805 74HCU04 SM 74HCU04 SM 74HCU04 SM DGND IC603E 1 11 13 14 P5V SPDIF SEL 7 100N 0805 SPDIF SEL 6 SPDIF SEL 5 C605 DGND IC6
12V 100mA P12V P12V R413 6R8 0805 1% R414 6R8 0805 1% Q413 BC859B Q409 BC859B P5V Q411 Q412 + R432 10K 0805 TP401 R433 10K 0805 IC400B BD180 PNP TO-126 R400 4K7 0805 6 SK402B TOP - B TP400 4 5 6 R448 R452 1K0 0805 100K 0805 R430 JACK STEREO DUAL 3.
Phase Locked Loop Board L948 Contents ! Circuit description ! Component overlay ! Parts list ! Circuit diagrams
AV8 Phase Locked Loop Board Introduction Refer To Block Diagram The phase locked loop performs a comparison between the incoming master clock from the crystal semiconductors SPDIF receiver chip CS8415A and a locally derived master clock from an xtal based Voltage controlled oscillator (VCXO). The comparison is made at Fs (44.1 or 48 KHz) rather than the master clock frequency (256xFs) as this improves the low frequency noise rejection of the circuit.
L948 Phase Locked Loop Board Issue 1.
L948 Phase Locked Loop Board Issue 1.
L948 Phase Locked Loop Board Issue 1.0 Designator Part Description R25 R26 R28 R29 R30 R31 R32 R62 R63 R64 R65 R66 R67 R68 R90 R91 R92 SK1 SK2 SK3 SP1 SP2 X1 X2 Resistor 0805 Surface Mount 0.125W 1% 10K Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.125W 1% 33R Resistor 0805 Surface Mount 0.
+12VD SP1 Q_1 IR RX SUPPORT PAD Q_2 Q_3 Q_4 Q_5 Q_6 Q_7 Q_8 LOCKDETECT XTAL/BYPASS* XTAL12.288 XTAL11.2896 C1 100N 0805 C23 100P NPO 0805 C2 100N 0805 C24 100P NPO 0805 C25 100P NPO 0805 C26 100P NPO 0805 C27 100P NPO 0805 D1 CNTRL DGND 100K 0805 1% R2 100K 0805 1% +5VD + C29 10U EL SG 1U0H SM C3 100N 0805 Q1 BFS17H C32 X1 10N 0805 11.
Mechanical Assembly Contents ! General assembly parts list ! Phono card upgrade assembly parts list
AV8 General Assembly Parts List ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY 1 E101AY E101AYB COVER PLATE ASSEMBLY 1 2 E839AY E839AYB VOLUME KNOB ASSEMBLY 1 3 E850PM E850PMB FMJ MAINS BUTTON 1 4 E919AY E919AYB FASCIA ASSEMBLY 1 HA4V06B SCREW MACHINE M4x6mm PAN TORX ST STEEL BLACK HA4V06S SCREW MACHINE M4x6mm PAN TORX ST STEEL NICKEL COVER TO CHASSIS 4 5 6 8A016 IEC INLET 1 7 E040AY REAR PANEL ASSEMBLY 1 8 E041AY PHONO CAN ASSEMBLY 1 1 9 E042AY P
AV8 General Assembly Parts List ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY 35 HA4A12B SCREW MACHINE M4x12mm PAN SUPA STEEL ZINC-PLATE BLACK REAR PANEL EARTHING STUD 36 HA4V06S SCREW MACHINE M4x6mm PAN TORX ST STEEL NICKEL CHASSIS EARTHING STUD 1 1 37 HE6V06B SELF-TAPPING N06x6mm PAN TORX-SLOT STEEL ZINC-PLATE BLACK SUB-PANEL TO CHASSIS 8 38 HF4V09B 39 HJ3A00F SCREW SELF-TAPPING-SEMS N04x9mm PAN TORX-SLOT STEEL ZINC-PLATE BLACK NUT NYLOC M3 STEEL ZINC-PLATE CLEAR 4
AV8 General Assembly Parts List ITEM 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY 63 P3020 GRIP-SEAL POLYTHENE BAG 254X356 CLEAR 180 GAUGE FOR REGISTRATION CARD, ENVELOPE AND HANDBOOK 64 SH000 REGISTRATION CARD IN POLY BAG P3020 1 1 65 SH000A ENVELOPE IN POLY BAG P3020 1 66 SH099 AV8 HANDOOK (MULTI-LANGUAGE) IN POLY BAG P3020 1 67 SH116 L816RC CR80 REMOTE HANDBOOK 68 SH119 REAR PANEL CONNECTOR FITTING INSTRUCTIONS 69 SM631 SELLOTAPE PACKING 70 U015 BLANK BAR-
AV8 Phono Card Upgrade General Assembly Parts List ITE M 230V 115V 100V SILVER BLACK DESCRIPTION WHERE USED QTY 1 L870AY PHONO PCB 1 2 H031 20mm M3 FEMALE-FEMALE PILLARS 3 3 HF4V09B TORX SCREW NO.
ARCAM All parts can be ordered via spares@arcam.co.
