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AVR400 Service Manual

Issue 1

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Summary of Contents for AVR400

Page 1: ...AVR400 Service Manual Issue 1 ...

Page 2: ...0 0 20 ANGULAR TOL 2 DEGREES 0 70 90 ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE STATED 20 E F 6 DATE DRAWN BY 1 3 F A3 A 4 CHECKED BY 4 MATERIAL B C DRAWING TITLE 10 A 30 ORIGINAL SCALE 1 4 FINISH 8 50 2 2 8 7 6 D SHT 1 OF 4 7 A R CAMBRIDGE LTD PART NUMBER AND DRAWING NUMBER D 23425 60 E 100 1 3 B C 40 DATE CHG ZONE DESCRIPTION OF CHANGE REL DR CHK ECO NR MCM 7 9 2010 MGB AVR400 MAIN ASSEMBLY ...

Page 3: ...GREES 0 70 90 ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE STATED 20 E F 6 DATE DRAWN BY 1 3 F A3 A 4 CHECKED BY 4 MATERIAL B C DRAWING TITLE 10 A 30 ORIGINAL SCALE 1 4 FINISH 8 50 2 2 8 7 6 D SHT 2 OF 4 7 A R CAMBRIDGE LTD PART NUMBER AND DRAWING NUMBER D 23425 60 E 100 1 3 B C 40 DATE CHG ZONE DESCRIPTION OF CHANGE REL DR CHK ECO NR MCM 7 9 2010 MGB AVR400 MAIN ASSEMBLY FANS TRANSFORMERS ...

Page 4: ... 10 OTHERWISE STATED 0 0 0 20 ANGULAR TOL 2 DEGREES 0 70 90 ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE STATED 20 E F 6 DATE DRAWN BY 1 3 F A3 A 4 CHECKED BY 4 MATERIAL B C DRAWING TITLE 10 A 30 ORIGINAL SCALE 1 4 FINISH 8 50 2 2 8 7 6 D SHT 3 OF 4 7 A R CAMBRIDGE LTD PART NUMBER AND DRAWING NUMBER D 23425 60 E 100 1 3 B C 40 DATE CHG ZONE DESCRIPTION OF CHANGE REL DR CHK ECO NR MCM 7 9 2010 MG...

Page 5: ...UNER EU US 1 80 5 5 TOLERANCES UNLESS 0 00 0 10 OTHERWISE STATED 0 0 0 20 ANGULAR TOL 2 DEGREES 0 70 90 ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE STATED 20 E F 6 DATE DRAWN BY 1 3 F A3 A 4 CHECKED BY 4 MATERIAL B C DRAWING TITLE 10 A 30 ORIGINAL SCALE 1 2 5 FINISH 8 50 2 2 8 7 6 D SHT 4 OF 4 7 A R CAMBRIDGE LTD PART NUMBER AND DRAWING NUMBER D 23425 60 E 100 1 3 B C 40 DATE CHG ZONE DESCRIPTI...

Page 6: ...idal power transformer via the connector BN508 to the bridge rectifier D5830 This is mounted on a small PCB near the top of the heatsink The rectified AC is then sent to the main PCB via connectors BN581 582 To avoid induced hum and distortion it is important to keep these cables twisted tightly together and well away from the actual power amplifier circuitry The main 15 000μF 80V reservoir capaci...

Page 7: ...igh frequency stability One half of the normally off relay RL52 is used to switch the load in and out Each power amplifier is protected against overload in a number of ways The complementary transistors Q5130 and Q5131 protect the NPN half of the output stage and Q5140 and Q5141 the PNP half They operate as Sziklai pairs passing negligible current until a threshold voltage of approx 600mV is reach...

Page 8: ...in Board first the mains voltage switching uses a double pole double throw slide switch accessible from the back panel One pole addresses the standby transformer and the other the toroidal power transformer Ensure the switch setting matches the supply voltage before switching on the AVR400 Nominal settings are 115 and 230V 15 The 20mm 115V fuse in line with the toroidal trans former is rated at 15...

Page 9: ...and C643 make up a snubber to reduce over shoot This provides a high current 5V supply to the Input Board via pins 4 and 5 of BN62 This 5V supply also feeds two 3V3 linear regulators IC67 and IC68 These in turn supply the audio DSP ICs on the Input Board via pins 10 and 11 of BN62 4 It feeds the 5V 3 terminal LDO regulator IC66 via the diode D616 which itself is preceded by the smoothing network c...

Page 10: ...high signal on the LED net turns on Q902 and Q903 This turns off the npn Q913 to disable the red LED and turns on the pnp Q912 to enable power to the green LED The reverse is true when the LED line is low Pulling the STB LED line low when the LED line is also low powers both LEDs and gives a yellow light to show when the unit is booting up Note that the power supply is STBY 5V to allow the red LED...

Page 11: ...uts IC101 is a Renesas R2A15218FP analogue multiplexer and volume control with a gain range of 42 to 95dB in 0 5dB steps It is digitally controlled from the system microprocessor via the I2C bus on pins 49 and 50 A high logic signal on pin 51 enables the system mute IC101 has 7V supplies generated from the 15V rails with the regulators IC102 and IC103 All stereo external line level inputs using ph...

Page 12: ...nto account the presence of AC mains via P_U the pull up line from the Power Supply board and the MUTE_POWER line derived from the power amplifiers Vcc rail this is normally high when Vcc is high The output lines are SB_MUTE2 for the surround back chan nels SBL and SBR ZONE2_MUTE2 HP_MUTE2 for the headphones relay on the Front Panel board and FUNC_MUTE2 for the 6 main audio channels excluding SBL ...

Page 13: ...is is a 300MIPS dual core 32 bit fixed point DSP with 72 bit accumulators The first core is used for decoding standard and high definition audio formats Dolby DTS etc and the second is reserved for post processing such as bass management delay and room correction The secondary DSP IC142 is a Cirrus Logic CS49DV8 responsible for the Dolby Volume processing IC141 gets the 1 8V for its core from the ...

Page 14: ... to the AVR400 when it is powered down IC151 has several sets of comms busses SPI I2C and UARTs depending on which system or peripheral ICs are being addressed SPI Serial Peripheral Interface is a fast 3 wire interface clock transmit and receive with chip select being addressed by individual I Os I2C Inter Integrated Circuit is a relatively slow bidirectional 2 wire interface with open collector s...

Page 15: ...IC163 The other USB pins are not used Pins 26 27 28 and 29 make up an SPI bus to work with the Ethernet PHY IC161 pin 33 receives interrupts from IC161 Audio is decoded inside the Venice 6 i e from AAC FLAC MP3 WMA or WAV and sent out by two routes Pin 32 carries an SPDIF signal at 48ks s for the main system and pins 64 and 63 carry L R linear audio for zone 2 to the volume control IC101 The Venic...

Page 16: ... which attaches to a daughter board handling all analogue video I O signals the Analogue Video Board The HDMI Board contains 10 separately regulated local power supplies mostly derived from the unregulated but hum filtered 15V supply on the Power Supply Board This is input on pins 3 and 4 of the hard wired connector CN61 for 15V and pins 5 6 and 7 for the ground returns Pins 1 and 2 are not used S...

Page 17: ... a 256Mb SDRAM IC904 connected via 9 x 4 way 33 ohm resistor packs This is used as a line frame store for digitizing the analogue video signals CVBS S Video and Y Cr Cb received from the external video inputs and also separate i Pod derived analogue video signals It runs from the 2 5VH2 supply with further local decoupling components mounted on both sides of the PCB The 12 bit RGB video outputs ar...

Page 18: ... the HDMI1 4 specification is not supported by the AVR400 the ARC is configured by the sink to be carried in single i e non differential mode using HEAC as the signal line HEAC and HEAC are then AC coupled to pins 52 and 51 of IC918 via the 1μF series capacitors C439 and C428 R771 R777 R785 R795 and R799 bias the inputs and load the cable correctly Note HEAC is short for HDMI Ethernet and Audio re...

Page 19: ... inputs to the On Screen Display Controller IC83 IC81 runs from the 9VV supply consuming about 85mA so it gets quite hot It is controlled by i2C commands on pins 15 and 16 IC82 is also an NJW1321 It selects between the 3 component video inputs and its fourth input is unused Its Y Cr Cb outputs and the Y C and CVBS outputs of IC81 are then AC coupled to IC84 an NJM2566 6 way video amplifier filter ...

Page 20: ... C910 47 63 R906 1 2K C908 0 01uF R905 100K R907 100K R901 3 3 1 6 7 48 49 50 51 52 5 57 F1 IC NC TEST CP DA DO CS RESET OSCO LGND 53 54 IC 2 55 56 F1 VDD DGND VDISP 58 62 F2 F2 61 FIP91 CFLHCA16S202T C912 39P R904 3 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 IC901HVITC74HCT7007F D909 OPEN C953 OPEN D908 OPEN R977 OPEN JW901 OPEN C907 47 63V C906 OPEN C920 1000P R921 1K R923 1 8K R922 1 5K S902 S903 S904 ...

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Page 25: ...84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 5...

Page 26: ...3 M7 VDD_03 M8 GND_68 M9 GND_69 M10 GND_70 M11 GND_71 M12 GND_72 M13 GND_73 M14 GND_74 M15 GND_75 M16 GND_76 M17 GND_77 M20 GND_78 M21 GND_79 M22 REFN M23 REFP N1 P17 N2 P16 N3 AP2 N4 AP1 N7 VDD_04 N8 GND_80 N9 GND_81 N10 GND_82 N11 GND_83 N12 GND_84 N13 GND_85 N14 GND_86 N15 GND_87 N16 GND_88 N17 GND_89 N20 AVDD_01 N21 AVDD_02 N22 AVDD_03 N23 AVDD_04 P1 P18 P2 P19 P3 SCL P4 SDA P7 VDD_05 P8 GND_9...

Page 27: ...4 3 2 1 RN38 33ohm 1005SIZE X 4 1 16W 8 7 6 5 4 3 2 1 RN51 33ohm 1005SIZE X 4 1 16W 8 7 6 5 4 3 2 1 RN56 33ohm 1005SIZE X 4 1 16W 8 7 6 5 4 3 2 1 RN59 33ohm 1005SIZE X 4 1 16W 8 7 6 5 4 3 2 1 RN35 33ohm 1005SIZE X 4 1 16W 8 7 6 5 4 3 2 1 RN37 33ohm 1005SIZE X 4 1 16W 8 7 6 5 4 3 2 1 RN43 33ohm 1005SIZE X 4 1 16W 1 2 3 4 5 6 7 8 RN41 0ohm 1005SIZE X 4 1 16W 1 2 3 4 5 6 7 8 RN40 0ohm 1005SIZE X 4 1 ...

Page 28: ... 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 IC915 74ALVCH16827DGG R806 10K_NC R800 10K_NC C419 0 1uF 16V C429 0 1uF 16V C399 0 1uF 16V R827 75_NC C463 100P_NC R814 33 C441 0 1uF 16V C451 0 1uF 16V C430 0 1uF 16V C406 0 1uF 16V C398 0 1uF 16V C457 0 1uF 16V C464 0 1uF 16V C431 0 1uF 16V C452 0 1uF 16V C420 0 1uF 16V C471 0 1uF 16V C482 0 1uF 16V C483 0 1uF 16V R828 33 R821 4 7K ...

Page 29: ...542 0 1uF L849 CLZ9Z014Z L850 CLZ9Z014Z L85210UH 3A 11 12 10 9 7 8 5 6 3 4 1 2 13 14 16 15 23 24 22 21 17 18 20 19 25 26 28 27 29 30 BN301 R846 22K C531 220 25V C518 0 1uF C527 220P 8 7 6 5 4 3 2 1 IC927 CVISI8005QTL D904 CVDSS34SR L856 10UH 3A C493 0 1uF C506 150uF 10V R838 12K R851 5 1K R852 2K C513 1000P C534 220 25V C511 0 1uF C520 220P 8 7 6 5 4 3 2 1 IC923 CVISI8005QTL D902 CVDSS34SR L862 10...

Page 30: ...K F R5845 22K F R5814 4 7 R5924 10K F R5934 10K F R5912 1 5 0 2W G583 R5123 1K F Q5150 2SC4883A Q5131 BC856B Q5141 BC846B R5175 0 22 X2 5W R5143 1K F R5133 1K F C5135 0 1uF C5145 0 1uF C5134 10 50V C5144 10 50V R5170 1 0 0 25W R5138 820 F R5148 820 F C5150 N F C5160 N F R5180 1 0 0 25W Q5181 MMBT5551 R5182 100 F R5181 47K D5862 1SS355 Q5871 BC856B Q5874 BC846B R5871 3 3K F D5370 1N4003S D5380 1N40...

Page 31: ...V R5690 22K F R5623 1K F R5624 560 F Q5650 2SC4883A Q5631 BC856B Q5641 BC846B R5675 0 22 X2 5W R5643 1K F R5633 1K F C5635 0 1uF C5645 0 1uF C5634 10 50V C5644 10 50V R5670 1 0 0 25W R5638 820 F R5648 820 F R5680 1 0 0 25W C5650 N F C5660 N F Q5681 MMBT5551 R5682 100 F R5681 47K D5570 1N4003S D5580 1N4003S R5583 4 7 2W R C5583 0 1uF 100V Q5540 BC856B Q5530 BC846B Q5560 2SA1859A Q5513 KTA1024Y R557...

Page 32: ...24 75 C835 100 16 C836 0 1uF C834 10 50 R833 47K C884 56P C885 22P R867 OPEN R866 100K D801 Q802 KTC3875SY R879 8 2K C874 27P EU C873 27P EU X801 17 734MHz EU R881 1 2K R868 2 2K C878 0 022u C891 0 022u 14 13 12 11 10 9 8 7 6 5 4 3 2 1 IC86 C889 470 10 C886 22P R878 10K R885 270 R877 2 2K C883 0 1 50 R886 100K C875 100 16 C876 0 022u C840 1uF R873 1K C881 1 50 R874 6 8K R872 1K R876 39K C879 22P 3...

Page 33: ... R612 22K R614 22K 24 22 21 10 2 1 JK73 24 22 21 10 2 1 JK74 C615 330 25V C635 150uF 25V C636 0 1uF C638 0 01uF 1 2 3 4 5 6 7 8 IC61 CVISI8005QTL D631 CVDSS34SR L632 10UH 3A R635 47K R631 68K R633 5 1K 1 L631 10UH 3A C619 47 25V C620 0 047u C616 0 1uF 1 2 3 IN OUT GND IC63 CVIKIA7815APIVA In Out GND 2 1 3 IC62 CVIKIA7915PIVA 1 2 L641 KLZ9H001Z R721 10K C722 0 47uF C723 0 1uF C724 0 47uF C725 0 47u...

Page 34: ...2 3 4 5 D C B A 6 C D A APPROVE CHECK DESIGN DRAWING NO MODEL SHEET SCHEMATIC DIAGRAM REVISION 1 2 3 4 5 6 7 SCREW MARK 10 11 17 AVR400 L J Y 10 11 17 10 11 17 L J H S H S VIDEO 2330SCDZ MP 1 J15 LAND 1 J16 LAND DGND ...

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