Arcam-AVR600-avr-sm维修电路原理图.pdf

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1、UAAVR600 Service manual issue 1.2 ARCAMRadioFans.CN 收音机爱 好者资料库This PCB provides the power for the unit through CON203: +5V_STBY 5V standby supply L118 RS232, L126 display (on in standby) +3V3 PW338 L122 PW338 supply (on in standby) 1V8D L122 PW338 supply (on in standby) +5V_1 general 5V supply +6V_1

2、 L156 DSP, L126 Display & L119 NET supply +40V_VFD L126 Display +15V linear +15V supply -15V linear -15V supply LK100 or the thermal switch from the power amp transformer is required to pass the live mains. SW101 switches between 230V & 115V. R101 & R102 are NTC parts to prevent inrush currents when

3、 the power amp is turned on. CON202 takes the Clk PSU sync signal from L121, Relay SW from L122 (to turn on the main supplies) and /AC present back to L122. /AC present is generated from the standby transformer secondaries with D200.D210 & TR200. This will prevent the unit from starting if it is not

4、 low. The standby transformer is rectified with DBR200 (GBU4K) to give UNREG_PW338 which is used for the 1V8D (REG206 LM2670), 3V3_PW338 (REG201 LM2670). The 12V for the relays to switch the secondaries are also generated from REG207 (LM7812) which is then regulated down to give +5V_STBY REG200 (LM7

5、805). When the signal Relay SW is taken high by the PW338, the secondaries of the system & power amp transformer are switched in (RLY101 & RLY102). This enables +15V, -15V (REG204 & REG205) & +5V_1 & +6V_1 (REG202 & REG203).L123AY Connection board and PSU RadioFans.CN 收音机爱 好者资料库This PCB selects betw

6、een one of five component video inputs & also provides the output connector for Zone 3 audio. IC100, IC101 & IC104 (LT1675CGN video buffers) require +5V & -5V. The +5V comes direct from L123 & -5V is generated locally from the -15V supply (from L123). Selection of the five inputs is via IC102 (74HCT

7、595D serial to parallel converter, controlled via SPI Clk, Data & Vcomp latch) and IC100, IC101, IC104. IC102 generates a /ENx signal which tri-states the output when high and enables the output when low. When low the input is selected with the SELx signal, high for input1, low for input2. Truth tab

8、le: EN0 SEL0 EN1 SEL1 EN2 SEL2 0 0 1 X 1 x SAT 0 1 1 X 1 x AV 1 x 0 0 1 x VCR 1 x 0 1 1 x DVD 1 x 1 x 0 1 PVR 1 x 1 x 1 x BLANK* *When component input is not used, BLANK should be selected. SKT101 provides zone 3 audio output. L113AY Component Input Output boardThis PCB selects between one of five s

9、-video & composite video inputs for the main input & zone 2 video. It also controls the volume control for Zone 2 & 3. The main input video is selected using IC200 (LA73031V video mux) under the control of IC205 & IC208 (74HC595 serial to parallel converters, controlled by SPI Clk, Data & Vid IO Mux

10、 Latch). Inputs are selected using INSEL1, INSEL2, INSEL3 (Z2 INSEL1, Z2INSEL2, Z2INSEL3 for Zone 2 via IC203 LA73031V video mux). As there is only one sync separator within each LA73031V, it is necessary to select if this is used for S-video or composite (this means that once composite video is sel

11、ected as the source, it is not possible to autodetect S-video) - SYNC CTL selects, low = Svideo, high = composite. There are two buffered (IC201 & IC202 BA7623F video buffers) tape outputs, VCR & PVR which can be muted with VCR Mute & PVR Mute respectively through a transistor network. Each output i

12、s muted when that input is selected to prevent feedback, otherwise the output is a copy of the composite or S-video signal going to the main zone. Zone 2 video is buffered through IC204 (BA7623F video buffer) and can also be mute, if required using the signal Z2Vid Mute & a transistor network. When

13、S-video or composite inputs are not used, V MUX STBY should be asserted high. Note: this will disable both the main Zone & Zone 2 S-video & composite muxes. Video Input Truth table: (Z2)INSEL1 (Z2)INSEL2 (Z2)INSEL3 (Z2)SYNCCTL 0 0 0 1 AV comp 0 0 1 1 SAT comp 0 1 0 1 DVD comp 0 1 1 1 PVR comp 1 0 0

14、1 VCR comp 0 0 0 0 AV S-vid 0 0 1 0 SAT S-vid 0 1 0 0 DVD S-vid 0 1 1 0 PVR S-vid 1 0 0 0 VCR S-vid Volume control for Zone 2 & 3 uses IC300 & IC301 (BD3812F volume controls) via a two-wire interface (Zone SPI Clk & Zone SPI Data). IC300 has address D2, D1=1, IC301 has address D2, D1=0. The volume c

15、ontrols can be muted from IC208 (Serial to parallel converter) using Z2 vol mute or Z3 vol mute. The outputs are also relay controlled for powerup/down with Z2 Mute & Z3 Mute directly from the PW338 using RLY300 & RLY301 as shunt relays. The +7VA & -7VA required for the BD3812F volume controls is de

16、rived using REG300 (LM1117) & REG301 (LM337LZ) from the +15V & -15V from L123. L114AY Video input output This PCB selects on of 8 external digital inputs or one of two internal digital inputs & generates BClk, WClk & MClk for the DSP (see L156) & DAC (see L117). It also generates the clocks for the

17、ADC (see L116) when the unit is in ADC mode. The CD, AV & DVD inputs use coaxial connector SKT100 and feed into IC200 & IC201 (DS9637ACM buffers). The Tape, SAT, VCR & PVR inputs use optical connectors RX100, RX101, RX102, RX103. The outputs are padded down to give 3v3 outputs. There is also the Aux

18、 input which can be selected (see L117), the Net input (see L119) and the HDMI SPDIF (see L122). One of these inputs is then selected using IC202 & IC203 (74HC151 8-1 mux) under the control of IC204 (74HC595D serial to parallel converter) controlled by AN SPI Clk, AN SPI Data & Dig Mux Latch. The se

19、lected input is fed to IC100 (WM8805 SPDIF Rx/Tx) which is controlled from the PW338 via AN SCL, AN SDA & SPDIF /RESET. IC100 generates 8805MClk, 8805BClk & 8805WClk. Also, SPDIF Out which is a de-jittered SPDIF stream which is then buffered by IC103 part A, B, C & D (parts E & F are unused) to give

20、 both the optical output (TXC100) & 75ohmcoaxial output (SKT101). The selected input is also fed to IC205 part A (74HC123D monostable, part B unused) which gives a high output from pin 13 (SPDIF_PRESENT to the PW338) if an SPDIF signal is present. BClk=64* WClk MClk=128*WClk (192kHz/176.4kHz), 256*W

21、Clk (96kHz/88.2kHz), 512*WClk (48kHz/44.1kHz) this clock is used by the PSU to synchronise the switchers. IC105 (XC95C36 Xilinx) generates a pre-delayed SPDIF stream from the HDMI clocks (only MClk & WClk used) as the HDMI SPDIF is turned off during HD audio transfer & the WM8805 does not have a zer

22、o delay PLL. IC104 (74HCT157 Quad 2-1 mux) can also be used to re-direct the clocks from the HDMI into the system. IC100 (WM8805) can also operate in master mode to generate clocks for the ADC when processing an analogue input. 3V3D is generated locally on the PCB from 5V_1 using REG200 (LM1117).L11

23、5AY Digital Input Output board This PCB selects the analogue input for the main zone & Zone 2/3 and also digitises the analogue input for processing by the DSP / transmission over SPDIF. One of seven phono inputs (Tape, CD, AV, DVD, SAT, VCR, PVR), Aux (external) input (see L127), AM/FM & DAB(intern

24、al)/Sirius(external) inputs (see L118), Net (internal) input (see L119) and Phono (see L117). The input for the main zone is selected using IC200, IC208, IC205, IC209 (74HC4051D 8-1 mux) under the control of IC101 & IC102 (74HC595 serial to parallel converter), controlled by AN SPI Data, AN SPI Clk

25、& A In Mux Latch. The muxes operate on the virtual earth of IC203 part A (left channel) & IC206 part A (right channel), both NJM2114 op amps, inverting the signal. Part B of these two op amps re-invert the signal (correct phase) and this output is used by the ADC & the direct path Main L & Main R. I

26、C202 (NJM2114 op amp) inverts the original output of the mux (correct phase) to provide the three tape outputs, Tape Out, PVR Out & VCR Out. Each of these has individual mutes IC201, IC204, IC207 (DG413DY analogue mux) which mutes the output if that input is selected to prevent feedback. Otherwise,

27、the output is the selected input. The signals for these mutes, /Tape Mute, /PVR Mute, /VCR Mute come from IC102 (74HC595 serial parallel converter). Selection of the Zone 2 input is very similar, using IC300, IC303, IC302, IC304 (74HC4051 8-1 muxes) and IC301 (NJM2114 op amp). The Main L & Main R ar

28、e connected to input AIN1A/AIN1B of IC100 (CS5345 ADC). Aux L & Aux R are also connected to AIN4A/AIN4B as this is configurable as the MIC input and can provide power from pin25 of IC100. the ADC is controlled from the PW338 via AN SCL & AN SDA. ADC/RESET also comes from IC102, so the ADC can be hel

29、d in reset when not being used. The ADC always operates in slave mode and will sample at the rate dictated by the incoming clocks from L115 (buffered on L122). ADC Data is sent to L115 so that it can be transmitted by the SPDIF transmitter and selected for input to the DSP. +12VA (REG301 LM7812) & -

30、12VA (REG304 LM7912) for the local op amps are derived from +15V & -15V from L123. +5VA (used by the ADC) is derived from the +12VA with REG302 (LM1117). +3V3D (used by the ADC) is derived from the +12VA with REG300 (LM1117). +3V3A (REG303 LM1117) & -3V3A (REG305 LM337LZ) for the muxes are derived f

31、rom +5VA & -12VA. L116AY Analogue input board Truth table MUTE Main Asel Z2 Asel ADC/RST VCR PVR TAPE 5 4 3 2 1 0 5 4 3 21 0 x x x x x x x x x x 1 1 1 00 0 Z2 CD x x x x x x x x x x 1 1 1 00 1 Z2 AV x x x x x x x x x x 1 1 1 01 0 Z2 SAT x x x x x x x x x x 1 1 1 01 1 Z2 DVD x x x x x x x x x x 1 1 1

32、 10 0 Z2 VCR x x x x x x x x x x 1 1 1 10 1 Z2 PVR x x x x x x x x x x 1 1 1 11 0 Z2 TAPE x x x x x x x x x x 0 0 0 11 1 Z2 Phono x x x x x x x x x x 0 0 1 11 1 Z2 Aux x x x x x x x x x x 0 1 0 11 1 Z2 GND x x x x x x x x x x 0 1 1 11 1 Z2 AM/FM x x x x x x x x x x 1 0 0 11 1 Z2 DAB/Sirius x x x x x

33、 x x x x x 1 0 1 11 1 Z2 Net x x x x x x x x x x 1 1 0 11 1 Z2 Spare x x x x x x x x x x 1 1 1 11 1 Z2 GND x x x x 1 1 1 0 0 0 x x x xx x Main CD x x x x 1 1 1 0 0 1 x x x xx x Main AV x x x x 1 1 1 0 1 0 x x x xx x Main SAT x x x x 1 1 1 0 1 1 x x x xx x Main DVD x x x x 1 1 1 1 0 0 x x x xx x Main

34、 VCR x x x x 1 1 1 1 0 1 x x x xx x Main PVR x x x x 1 1 1 1 1 0 x x x xx x Main Tape x x x x 0 0 0 1 1 1 x x x xx x Main Phono x x x x 0 0 1 1 1 1 x x x xx x Main Aux x x x x 0 1 0 1 1 1 x x x xx x Main GND x x x x 0 1 1 1 1 1 x x x xx x Main AM/FM x x x x 1 0 0 1 1 1 x x x xx x Main DAB/Siriusx x

35、x x 1 0 1 1 1 1 x x x xx x Main Net x x x x 1 1 0 1 1 1 x x x xx x Main Spare x x x x 1 1 1 1 1 1 x x x xx x Main GND x 1 1 0 x x x x x x x x x xx x Tape out mute x 1 0 1 x x x x x x x x x xx x PVR out mute x 0 1 1 x x x x x x x x x xx x VCR out mute x 1 1 1 x x x x x x x x x xx x No loop mute 0 x x

36、 x x x x x x x x x x xx x ADC reset 1 x x x x x x x x x x x x xx x ADC running This PCB converts the digital audio from the DSP (see L156) to analogue audio. It also configures the use of channels 6 & 7, has the headphone amp, has the RIAA equaliser for the Phono input and handles the multi-channel

37、analogue input. The phono amplifier is a standard RIAA response and is intended for use with MM cartridges, 5mV (check this!) output. C128 & C129 are important to prevent the DC offset of IC100 (NJM2114 op amp) from causing problems. IC101 forms the basis of the headphone amplifier. The output of th

38、is section goes to L127. IC300 (CS4385 8-channel DAC) takes multichannel data (Data LR, Data CSw, Data SlSr, Data SblSbr) from the DSP (L156) in addition to clocks (DAC MClk, DAC BClk, DAC WClk) from L115 (buffered on L122). Control of the DAC is via AN SDA, AN SCL (from the PW338) and DAC /RESET (f

39、rom IC212). The balanced outputs from the DAC are filtered by IC400, IC401, IC402, IC403 (NJM2114 op amps). All channels are identical except for the subwoofer, which has 10dB (check this!) gain. Left & right inputs to IC204 (CS3318 volume control) are multiplexed between the filtered DAC output, th

40、e Main L & Main R direct analogue inputs (from L116) and the left & right multichannel inputs (SKT200) with IC200 (74HC4052 dual 4-1 mux). This mux operates on the virtual earth of IC201 (NJM2114 op amp) and also provides the signals Mux L & Mux R. The centre input to IC204 (CS3318 volume control) i

41、s multiplexed between the filtered DAC output and the centre multichannel inputs (SKT200) with IC203 (74HC4053 triple 2-1 mux). This mux operates on the virtual earth of IC205 part A (NJM2114 op amp). Subwoofer, surround left & surround right inputs to IC204 (CS3318 volume control) are multiplexed b

42、etween the filtered DAC output and the subwoofer, surround left & surround right multichannel inputs (SKT200) with IC214 (74HC4053 triple 2-1 mux). This mux operates on the virtual earth of IC201 (NJM2114 op amp) part A (subwoofer) & IC207 (NJM2114 op amp - Surround left & surround right). IC213 sel

43、ects between the filtered DAC output of surround back left / right, surround back right / left multichannel inputs, Z2 L / Z2R and Mux L / Mux R. This allows the use of channels 6 & 7 as either surround back left/right in the main zone, or powered Zone 2 outputs, or bi-amped left/right in the main z

44、one. This mux operates on the virtual earth of IC209 (NJM2114 op amp). IC204 (CS3318 volume control) is controlled by AN SCL, AN SDA (from the PW338) and VOL /RESET & VOL /MUTE from IC212. L117AY Analogue output Truth table Sel0 Sel1 Sel2 Sel3 Sel4 Vol /RST Vol /MuteDAC /RST 0 0 0 0 0 1 1 1 DAC outp

45、ut 1 0 x x x 1 1 1 L/R analogue direct 0 1 1 1 0 1 1 1 MCH output x x x 0 1 1 1 1 Sb=Zone 2 x x x 1 1 1 1 1 Sb=L/R x x x x x 0 x x Volume control reset x x x x x 1 0 x Volume control mute x x x x x x x 0 DAC reset The output of the volume control is buffered through IC202, IC206, IC208, IC210 to rem

46、ove any DC offset before going to CON100 (connection to the power amp) and SKT100 & SKT100 phono outputs sockets. Shunt relay muting is provided for power on/off, controlled from the PW338 (Main mute & Sblr/Sbr mute). This PCB handles the following functions: RS232 communication with the PW338 iPod

47、RS232 control (compatible with rLead & rDock) Sirius satellite radio (US) Z1, Z2, Z3 12V triggers DAB AM/FM Z1, Z2, Z3 IR inputs. CON102 & IC102 (MAX3232 RS232 converter, part1) provide the RS232 communication with the PW338 used for RS232 control or updating. Note, the signals RS232 Tx & RS232 Rx a

48、re labelled relative to the PW338, so RS232 Tx is the Tx FROM the PW338. CON105 & IC102 (MAX3232 RS232 converter, part2) provide the iPod RS232 communication. Pin 9 of CON105 (/iPod Present to PW338) is taken low when an rLead is connected. Note, the signals iPod Tx & iPod Rx are labelled relative t

49、o the UART (IC403, L122), so iPod Tx is the Tx FROM the UART. SKT101 provides the Sirius RS232 communication. Note, the signals Sirius Tx 232 & Sirius Rx 232 are labelled relative to the UART (IC403, L122), so Sirius Tx 232 is the Tx FROM the UART. SKT101 also provides the +5V for the Sirius Home Co

50、nnect module, so the module does not require external power. This power comes from the +5V_1 (L123) and is connected to pins 1 & 2 of SKT101 as power & host presence. Analogue audio also passes through this socket, so this is the only connection to the Sirius module. There are three triggers, Zone1