AVR400 Service Manual Issue 1
1 4 3 5 7 6 2 F 8 DATE CHG. ZONE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ECO NR. DESCRIPTION OF CHANGE REL. DR. CHK. F 3 E E D D C C ITEM NO. PART No. DESCRIPTION QTY 1 TGP3523 / TGP3524 FASCIA ASSEMBLY BLACK / SILVER 1 2 TGP3526 / TGP3527 COVER BLACK / SILVER 1 3 HA4V06S TORX SCREW M4 x 6 4 B B 23425 TOLERANCES UNLESS 0.00± 0.
1 2 4 3 5 7 6 F ITEM NO. 1 E PART No. CHG. ZONE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- DESCRIPTION TGP3539 8 DATE ECO NR. DESCRIPTION OF CHANGE REL. DR. CHK. F QTY TRANSFORMER - POWER 1 2 FAN 80 x 80 x 25mm 2 3 FAN MOUNTING BRACKET 2 E 1 D D C C 2 B B 3 23425 TOLERANCES UNLESS 0.00± 0.10 OTHERWISE STATED 0.0 ± 0.20 ANGULAR TOL.
2 1 4 3 5 7 6 F SOLDERED TO POWER AMP PCB E 8 DATE CHG. ZONE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ECO NR. DESCRIPTION OF CHANGE REL. DR. CHK. F 5 E 2 D D ITEM NO. PART No.
2 1 4 3 5 7 6 5 F 8 DATE CHG. ZONE -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ECO NR. DESCRIPTION OF CHANGE REL. DR. CHK. F 6 E E 2 7 ITEM NO. D 4 3 PART No.
AVR400 Power Amplifier Circuit Description Apart from the power transformer, the power amplifier electronics is fully contained on the large double sided PTH PCB and heatsink located at the bottom of the AVR400. This is called the Main Board on the schematic diagrams (pages 11 and 12). The Main Board also contains the mains input circuitry, including the safety fuses and standby power transformer, so great care should be exercised when probing this area of the board.
additional feedback further reduces high frequency distortion and crossover distortion within the audio band. These stages are partially decoupled from the Vcc and Vee power supplies by D5130/R5130/C5130 and D5129/R5129/C5129 respectively. They are also bootstrapped to the amplifier output via the networks R5118/C5128/R5128 and R5117/C5127/R5127. This raises the supply lines by approximately 3V at full output to avoid clipping the driver stage prematurely.
1) Any amplifier channel pulls current through the SOA_PROTECT line for long enough to charge up capacitors C5871 and then C5872 so that Q5874 turns on. 2) Any amplifier channel pulls current through the OVERLOAD line for long enough to charge up C5882 and turn on Q5882 and thus Q5884. 3) Any amplifier channel has a large long term (DC) offset (typically greater than +/-3V) sμFficient to charge up C5861 enough to turn on either Q5862 (positive offset) or Q 5864 (negative offset). These then turn on Q5863.
Two secondary windings from the toroidal power transformer are fed in via CN63. Pins 1, 2 and 3 connect to a centre-tapped secondary winding used to generate approx +/- 20VDC via the bridge rectifier diodes D603/3/4/5 and the 2,200μF 35V reservoir capacitors C609 and C610. R603 and R604 are 0.47R 1W fusible resistors for circuit protection – if they fail replace only with the same type and value.
It communicates with the Input Board via CN101 and a 31 way ribbon cable. Other connectors comprise CN94 which connects to two secondaries of the main power transformer and the hard wired BN93 which connects up the daughter board. There are two associated break off boards. One houses the front panel mounted single pole mains switch plus its suppression capacitor C901 and a connector BN502.
the same manner as described above for RL902) then the L front input is routed to the low noise microphone amplifier IC903. This operates as two cascaded virtual earth amplifiers, each with a voltage gain of approximately 21 (R961/960 and then R965/962). Note the MIC line is biased at +6V via resistors R956, R957 and R958. The amplified signal is output to the Input Board on pin 5 of CON101.
IC101 has one 8 channel variable level output bus labelled VOL01 through to VOL08. Capacitors C295-8 and C231-4 float the ground ends of the associated internal potentiometers to minimize clicks This bus goes via specially selected 100μF/25V capacitors to the dual op amps IC121-124, wired as voltage followers and running from the +/- 15V supplies. The C, SL, SR, SBL and SBR outputs are shunt muted when required via the 560R resistors R383-388 and the dual transistors Q303-305.
IC143 is the Cirrus Logic CS42548. It includes an SPDIF receiver, 2 channel ADC and 8 channel DAC. Only one input (pin 43) of the SPDIF receiver is used; the others are grounded. IC143 has +5V analogue supplies, locally decoupled to analogue ground by C721/722 for VA (pin 24) and C703/704 for VARX (pin 41). The digital supply is also +5V, decoupled to digital ground by C705/706 (pin 5) and C750/756 (pin 51).
IC141 also has two sets of I2S data outputs. DA1 is an 8 channel I2S signal (pins 47, 48, 49 and 51) shown as part of the bus DA0(04:07). This feeds the input of the second DSP IC142 (on pins 23, 24, 26 and 27). The system clock is on pin 52 of IC141 and the LR clock on pin 54. These go to pins 29 and 30 of IC142. DA2 is a stereo I2S output (pin 43 for data, pin 44 for the system clock and pin 46 for the LR clock). This feeds the HDMI board via WF104 and the octal bus switch IC146.
rogating the USB socket and insertion of a clean USB stick containing only the system firmware will initiate a complete recovery automatically. IC164 is a MiniLogic ML61C282PR precision voltage detector, with a threshold of 2.8V, built in hysteresis and a CMOS output, used to reset IC162 at power on. IC163 is an Intersil USB switch, type ISL54220, which routes the USB socket on the rear panel either to the Venice 6.
the necessary level shifting. IC73 includes internal charge pumps to convert CMOS logic level inputs to +/-5V RS232 level outputs and +/-25V tolerant RS232 inputs to CMOS logic level outputs. Maximum rated speed is 300kb/sec. JK73 is a dual mono 3.5mm jack socket providing two +12V trigger outputs Z_1 and Z_2. The series pass transistors Q712/715 are pnp T0-92 types with emitters referred to the +12V rail via the paralleled 4.7R resistors R714/715 and R711/712.
The HDMI input SOC, IC901, is a 144 pin LQFP Analog Devices ADV3014B. This is a 4 into 1 HDMI 1.4a multiplexer and is connected to inputs 4 and 5 (VCR and PVR) on the rear panel (JK95 and JK96). The other two inputs on IC901 are not used. The core power supply is +1.8V and the receiver terminator supply voltage is +3.3V. Note that most power supply decoupling components are on the underside of the PCB.
Q914 and Q915 (on the underside of the PCB) send BYPASS_ON and BYPASS_OFF logic signals from IC906 to the array of 4 x 20-bit non-inverting line driver/bμFfers with tri-statable outputs, IC911/912 and IC915/916. These are arranged as a 40 way 2-in, 1-out fast switch to bypass IC906 when required (e.g. if 3D video is present). The video is in 12-bit RGB format and 4 more bμFfers are required for the video clock, H and V syncs and the DE (data enable) line, thus using up all of the available 40 ways.
AVR400 Analogue Video Board This is connected into the rest of the system via the HDMI board using CN301.The circuitry is shown on sheet 13 of the schematic diagram.
6 5 4 3 2 1 FROM POWER TRANS CN94 4 GND 5 V DISP GND FRONT 3 Filament V(AC) 2 Filament V(AC) 1 CUP12326Z-1 R902 10 47/25V D901 4.3V 3.9V R903 D M_GND D902 D 0 6 5 2 1 M_GND C903 : 47uF/50V -> 47uF/25V C904 10 8.2K R910 2010.04.12 M_GND R909 Q901 C1027Y 40V 0.1uF 2010.04.12 C903 : 100uF/63V -> 47uF/63V 2EA 39P C912 C913 M_GND 3.3 10 M_GND RC901 0.022u R904 M_GND 3.3 F1 7 R901 F1 48 D916 IC 49 1N4003 IC 50 C902 C903 NC 51 0.
5 4 PVDD_1V8_3014 C111 C104 C105 0.1uF / 16V 25V/0.01UF C138 10uF/6.3V Worst Measured Currents 24.3mA L802 +1.8VH2 0.
4 V3 DVDDIO_3.3V R692 R707 0 4.7K C6 PWRDN1 C7 PWRDN2 0.
+3.3VH1 L832 Worst Measured Currents 9.8mA(Max:10.5mA) +3.3V_PLL 9R005Z C383 Worst Measured Currents 25mA(Max:26mA) C322 C356 Worst Measured Currents 0.5mA(Max0.6mA) +1.8V_PLL L829 0.1uF / 16V +1.8VH1 9R005Z Worst Measured Currents 15mA(Max:16mA) 0.1uF / 16V C283 0.1uF / 16V C288 C280 C392 0.1uF / 16V C386 0.1uF / 16V C380 0.1uF / 16V +1.8V_DLL L817 9R005Z 10/16V C301 +1.8VH1 0.1uF / 16V Worst Measured Currents +1.8V_ADC 43mA(Max:45mA) L819 0.1uF / 16V +1.
3 0.1uF 1 Option 1000P_NC C543 1000P_NC Option C544 27K_NC 1 D901 100 BAR43C_NC TX_DR10 TX_DR09 TX_DR08 TX_DR07 TX_DR06 TX_DR05 TX_DR04 TX_DR03 TX_DR01 TX_DR00 TX_DR11 R834 100 49.9 49.
6 5 4 3 2 1 CUP12328Z DC/DC REGUALTOR D D TO VIDEO 1 2 V-GND +15VA 4 3 -15VA IC930 C532 6 5 7 9 8 14 1321_SDA 5.1K 19 21 OSD_CE 4.7K R854 OSD_SCL 4.7K R856 R840 16 15 17 0.1uF C508 1321_SCL 10/16V 0.1uF C537 C514 22/6.3V 13 COM_Y_CONV COM_PB_CONV COM_PR_CONV 470/16V C535 11 GND OUT IN +3.3VDD 1 12K 0.1uF 62k R872 3 OSD_SDA 2.5V IC929 SV_Y_CONV 2 25 IN OUT +2.
3 1 2 4 FROM POWER BOARD 2 4 6 8 1 3 5 7 FAN BN591 CN501 1 2 3 +12V +12V 10K(F) 47K Q5911 KTA1271Y R5908 7.5K 10/50V 1SS133M 1K(F) 0.1uF GND_SR 3 2 4 5 GND_DEC SBR_OUT GND_SBR 1 D5054 4.7K RY54 R5910 - 5 + 6 - 7 + 8 - SR_OUT FR SR SBR 9 10 JK52 6 (CHG1A502) CN103 5.1V D5909 330K SPK_REALY 1 SPK_REALY R5907 2 PROTECT 7.5K POWER_RELAY 3 CEN_OUT C5051 D5052 1SS355 D5053 (CHG1A502) 4 CEN Q5054 KRC107S R5909 100/35V 7.
3 1 2 4 VCC R5629 D5629 22 0.5W(Fusible) 1N5819 1N4003SR 1N4003SR D5948 D5946 C5948 2.2/50V 3 5 2 6 5 4 OVERLOAD 100(F) R5690 22K(F) C5689 0.1uF 100V R5689 5.6K(F) R5682 R5683 C5683 2 1 CN56 22uF/100V C5680 D5680 1K(F) (N.F) VEE C 3 2 1 Q5781 MMBT5551 3.3K(F) OVERLOAD (CHG1A503) Q5788 MMBT5551 R5790 4.7 2W(R) 22K(F) R5784 R5788 R5789 10K(F) 0.1uF 100V 100(F) SBR_OUT R5786 1.0 0.
6 5 4 3 2 1 VIDEO PART Z2 OUT 68P JK85 CJJ4M069Z(GOLD) C769 68 R825 VGND 0.01uF 100/16 R886 C876 100K C879 C840 C878 0.022u 22P->33P C880 1uF 22P 16 22P Q802 KTC3875SY 8.2K R879 0 R880 VGND VGND 1.
4 3 0.01uF R715 4.7 0.01uF 10K R718 C712 R719 0.01uF R723 C714 10K 10K 0.01uF C713 R726 R721 10K 10K 0.1uF D716 CVD1SS355T ST+5V IC72 220 4 3 KP1010B IC71 2 R736 D718 0.1 0.1 0.1 0.47 0.1 0.47 0.47 OPEN 0 JK74 Z_1 IR_IN 1 22 24 Z_2 IR_IN 21 1 4 220 R731 OPEN 10K 0 KP1010B 2 0.1 2 10 R735 3 R2in C 1 R732 47K 8 MGND 3 0.1 ST3232E 0.1 GND 68K ST202E C620 2 C619 VOUT 0.047u CTRL 47/25V VIN 4 R714 4.
6 5 4 3 2 1 D D SCREW MARK LAND C 1 1 J15 LAND J16 C DGND B B MP REVISION A 1 2 4 6 3 5 7 SCHEMATIC DIAGRAM AVR400 MODEL DESIGN CHECK APPROVE L.J.Y L.J.H S.H.S 10.11.17 10.11.17 10.11.
