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service manual AV311T

1. E H H amami AID LKKL mui a d 4 e iS 55 4 as Gy 2 I eH 1 80 5 1 4 Bottom layer of DECODE Board 5 1 5 ANPLIFIER POWER Board C149 148 dko wo Scias SES C130C129 VD112 1 VD114 W35 C116 106 101 VD111 VD113 w20 W77 W78 T6 3AL250V T6 3AL250V W74 L T 44 C143 1 FL101 FL102 82 5 1 6 POWER Board SS 99 L104 115 N G R SN E EAS D ww L102 L103 117 Wil R112 W10 WA FL100 T4AL250V o LO 5 E X YY LO L102T6 3AL250V 83 5 1 7 Key Scan Board 5 1 8 VIDEO Board 7310T 1 2006 01 18 85 9 157 1U 16V SCLK225 DINI 27 E CS49326 3 gt ne 146 1111 104 VA5 2 5 c123 L105 C147 V7 3PIO0 c RE 1u 16V VD5 SASHasS AsO T 0Ohm 1106 HE 10 6 FB VD3 3 C126 104 pue MO MI C149 L112 C148 5 EM FB 150 151 104 7 104 1U 16V 104 SCLK1 7 C152 INI 1U 16V kosa C153 LRCK18 E 104 1U 16V N109 129 BMI117 3 3 VD3 3 12V V102 VA5 100U 16V
2. L 7 V E TUN_L TUN_R FUN VOL 9 R gt REMOTE e lt i ee ie 4558 2315 Straight through Mix amp buffer E mi SL VCD 1 4558 4558 VOL E SR Echo volume Relay drive i5 ids ECHO RLYC SW mute and relay a i state detect OK CLK OK DATA DVD CD4052 PT2399 ECHO adjustment Vc power mol c MEE RUE x AGND amplifier board ve power E 1 POWER BOARD x gt CLK DATA LAT DO CE 6311 I O IUN L TUN R aus E EE n SSES 72 OK CLK OK DATA FAN 12V 6 8V 5V CPU I OQDCL DDA DATA REMOTE P LRM P SCM PRLY PDF cose 014052 4052 vs M 5 A WT E lle NE 5 1 4053 vs 5V svp VIDEO BOARD PH_SW Amplify 5 PH A P PH Rs MIC PHONE BOARD Figure 3 1 4 1 Signal flow chart of the player 19 Section Two Unit Circuit Principle 3 2 1 Signal processing board 1 Input selection circuit AV321T RU has6 kinds of input means in all optical input coaxial input CD DVD 5 1CH and tuning input Digital signals of optical coaxial input of this player are directly sent to power amplifier board for processing through flat cable Analog input selection of AV321T RU is fulfilled through an electronic switc
3. Noise testing 2 3 15 Select Speaker Mode Headphone Press SPEAKER MODE SETUP button on the remote control when SP 5 LARGE appears pressing MULTI FUNCTION button again may change the left right soeaker mode Press speaker mode button on the remote control when SUB ON or SUB OFF appears pressing MULTI FUNCTION button again may set whether there is subwoofer speaker mode Note The selection of Large or Small is set by speaker calibrater and bass playing ability When subwoofer speaker and subwoofer output terminal are connected you may set SUB ON or else SUB OFF When speaker mode is set in SMALL subwoofer speaker must be set in ON 2 4 ACCESSORIES 1 degere M ale 5 ii cc 1pcs JACK 1o Sessu ses rait te Gne 1pcs 7 ME 2 5 PM AM 1suit 2 5 SPECIFICATIONS 10 Rated Output Power Main Channel 1kHz 4O RMS Total Harmonic Distortions 1 80W 80W Centre Channel 1kHz 4Q RMS Total Harmonic Distortions 1 15W Surround Channel 1kHz 4Q RMS Total Harmonic Distortions 1 15W 15W 2 Separ
4. Roun ap GNDR LOUT pary l l L AVSS A 6 8V 4 7u 16V RIN 13147 1 8 GNDL 12 47u 16V cL DA 16 17 BYPASL 4 7u 16 R2 Ud C126 G13 _ LTRE RTRE 5 Je M ERN LBASS3 RBASS3 AL C12 C140 15n 15n M LBASS2 RBASS2 21 12 141 0 33 0 33 LBASS1 RBASS1 2 1 14 6 8V Ll A 6 8V R127 134 R135 22K 22K 22K 16 8 z 1 Figure 3 3 1 2 Volume circuit diagram Note when there is no output firstly make sure that it is a certain channel has no output or all channels have no output that all channels have no output may be caused by abnormal power supply of a certain part or abnormal mute signal then make clear whether it is decode has no output or signals without being decoded have no output that decode has no output is caused by abnormal working of decode part please refer to cases of decode has no output CD4052 and CD4053 belong to electronic switch with high switch frequency easy to damage and may pull down 6 8V and 6 8V voltage after damage or pull down the gating signals A B of 62446 andtrouble of no output appears Example 3 Symptom decode has no function Description when in analog input decode has no output input digital signals have no output Analysis and troubleshooting analog signals with decoding have output so we can jud
5. 105 GS MICROPHONE HOLDER BOARD uy inlet ett 107 VIDEO FREQUENCY BOARD 108 S O _ _ ________________ 108 ted actae d edat 109 _ 110 ABEL etait eae ia eee eerie Bee 110 MENT MODULE aaa s 110 Chapter One About Maintenance 1 1 Safety precautions 1 1 1 Power supply When servicing audio power amplifier the servicing personnel pay special attention to the power board with 220V AC or else the improper operation will lead to body damage The alternate current which outputs to power amplifier board through power board is also up to voltage with about 50V when servicing short circuit and joint welding cannot occur or else the elements will be burnt out and trouble range will be enlarged 1 1 2 Precautions for antistatic Movement and friction will both bring static electricity which causes serious damages to integrated IC Though static charge is little when a limited quantity of electric charge is added to large scaleintegrated IC as the capacitance is very small in the meantime now the integrated IC is very much easy to be struck through by static electricity or the performance will decrease Thus sta
6. c 1 21 Cn ANN _ Ce wna ow wana ow Coma 3 5 3 function introduction to CD4051 1 DESCRIPTION The CD4051 is a single 8 channel multiplexer with three binary control inputs and inhibit input The three binary control input signals select 1 of 8 channels to be turned on and connect it to the single out The operating voltage is as to 18V and quiescent current is as low as 5 HA max at Vpp 5V 2 PIN CONFIGURATION ee I 53 3 5 4 function introduction to CD4052 1 DESCRIPTION The CD4052 is a dual 4 channel multiplexer with two binary control inputs and inhibit input The two binary control input signals select 1 of 4 pairs of channels to be turned on and connect it to the two outputs The operating voltage is as to 18V and quiescent current is as low as 5 max at Vpp 5V 2 PIN CONFIGURATION Y channel selection port 1 x 54 wa NN n s n x wees 1 3 TRUTH TABLE 3 5 5 function introduction to CD4053 1 DESCRIPTION The 4053 is a triple 2 channel multiplexer having three separate digital control inputs B and C and an inhibit input Each control input selects one of a pa
7. Press the SOUND SOURCE button on the remote control to separately select the sound source of optical coaxiall coaxial2 VCD and DVD as the working sound source of this unit Press TUNER button to select the built i tuner of this unit as the working sound source Press MENU button on the front panel of the unit and VFD screen displays SOURCE Rotate the MULTI FUNCTION knob Input channel Stero Boby prs psp Default e i Digital Decode screen will display OPTICAL COAX1 DVD Yes Yes No No Yes Stereo COAX2 DVD VCD EXT 5 1CH Signal Yes Yes No Yes Stereo AM and FM symbols which respectively PIS Yes Yes No x Yes Stereo stands for the sound sources on optical uds 2 0 3 Yes Yes Yes No No coaxial2 DVD VCD and external 5 AC 3 Yes Yes No NO Dolby 5 1CH terminals and the built in AM FM wave COO S TEST ND T NEC Ses F E band signals Press MULTI FUNCTION knob s NOTE In Dolby Pro Logic Il decode mode iit is to select this sound source Select video When Tuner video out When VCD Audio VCD videois selected When DVD audio 5 1 CH COAXIAL and Optical The DVD video is selected effective only when sampling rate less than 96KHz This unit can only receive PCM signals with s
8. _________ 59 2 2 2 59 S oghmeomitoductionto _____________________ aap 60 a 61 2B d4qunetenimroduetior 62 shaq 64 65 TA d4noclionamrodiieli m TO 7835 aa _______ 65 7932 66 4 516 tfunclionimiitrod clomto 66 ap i7 elo to POSTS 67 69 3s do tuncnondnitrod ectlonTo CADO 70 dEOdmetiondntreducuomlo GSbB Ap 7 71 AE 24 tnciemimtedacotdoX SBA T5 73 5 5 00 Introduction ______ ______ 74 Chapter Four Disassembly and Assembly Process eee 77 Chapter Cinque PCB board amp Circuit diagram ee 78 ESTO t EE 78 BoardSection Two circuit diagram eee 86 Chapter six BOM List eee eem eee eene 96 GA SIGNAL DISPOSAL BOA Bieter esse 96 6 2 SIGNAL DISPOSAL aAa AEk 97 BS DECODE BO Ae 99 RADE CODE BOMB D MDR EE 99 101 6 6 SURFACE GONTROL BOARD tetti praese 104 Oy a out du drum det da hama k ee Ee
9. TO 220U 16V 82 12V A 8 2V V103 C100 47 47u 16V 75V 12V DSW 10 3A N101 CD4052 TC102 16V 10U X100 x A 8 2V 12V A CON2 UJ A 8 2V 10 105 103 220U 16V S OUTI 16 100 104 S OUT2 220U 16V DSW 10 3A prog OHCIIA 925 26 VFD101 HL D253 VD103 E R113 1N4004 47 0 5W 270 0 5W R114 30V 1 1 0 25W VD101 VD102 C107 C108 30VAW 5 6V 0 5W 47u 35V 100u 35V XS10 v3 N V3 SS 5 F2 CON5 115 4 7k 0 25w N 5VD R116 100 N102 HS0038A2 4 C109 ___ C110 2 OUT L 47u 16V 103 R122 100 5VD 4 GND pu R106 R121 100 0 25W 100 0 25W 5VD oe AQ UNS R117 R118 N 9P3HD N 9P3HD 10K 10K 119 RP101A 100 01 PT6311 sss A N 3 ass 305 1 R108 R120 C111 100 RVP 1 E 103 ET H E XP15 VDD 5 8 f FN e DDA S 7 A m E E S101 RP101B REMOTE E INPTUSET m 1 9 470 470 L101 100 5VD R105 470 C113 TM R101 R102 C102 C103 C104 BI ss R111 47 16 103 10k 10k 221 221 221 4 7k 7k 7k NN 5VD From TRANS peog Ady LTS 6 C102 L101 100u 16V 47uH N100A C108 3 LM4880 C106 330u 16V 104 C103 2 R103 4 7K 03 10u 16V R109 R
10. 2 5551 C136 C154 104 1000 16 104 15103 N110 BM1117 2 5 VD2 5 cir C161 C132 E 10U 16v 104 NZ lt NIOID 74HC04 6101 i 4 158 YDS us E 12 288MHz 2 100U 16V 104 LEST gt 0Ohm VD103 1N4004 Vb3 3 5 EE 14 PIS PI6 M 17 PH SW 74HC04 74HC04 11 O 10 74HC04 DIGITAL INPUT P_LRM P_RLYC KM PH_SW P_SCM Eos JINIIID OMT u00n359S Iw C175 DA SL T cu 10U 16V 10U 16V N112B 10U 16V 49326 DO T DSPRST Z C178 p cus Wami 10U 16V 10U 16V 221 49326 DY 8415 INT 49 8415 ERR I 181 1 9 7 DA_SW 10U 16V T 10U 16V RR103 aee THE xT VD105 a 1N414g 10K C184 10U 16V C140 TOU I6V R126 10K 12V C166 AinR R128 10U 16V N111B TM E 5532 10U 16V 10U 16V C169 C190 DA L zs cue 10U 16V 10U 16V 10U 16V 47U 16V L109 C198 47U 16V C196 104 12V c PIeog HCIOOHCI CCS V106 12V 12V 58050 1102 47uH i C102 47u 16V VD112 c 3C110 8120 10V 10u 16V 470K C N C153 L P DISP Ld 4558 4 7u 16V 186 10 10u 16V C 12 m TUNERR 14 DVD R 15 ps 12V CDR N a ve F 1 TUNERL 5 a Cit C133 E 5
11. 3 5 13 function introduction to 17805 1 Description LM7805 is 5V voltage regulator locates on power board in this player and is used to generate 5V stable voltage Features Suitable for CMOS TTL the other digital IC s power supply Internal thermal overload protection 2 Internal short circuit current limiting Output current in excess of 1 A Metal Fin is fully covered with Mold Resin 3 PIN DESCRIPTION 3 5 14 function introduction to 7812 1 Description LM7812 is 12 voltage regulator locates on power board in this player and is used to generate 12 stable voltage 65 Features Suitable for CMOS TTL the other digital IC s power supply Internal thermal overload protection 2 Internal short circuit current limiting Output current in excess of 1 Metal Fin is fully covered with Mold Resin 3 DESCRIPTION 2 9mm om 3 5 15 function introduction to 7912 1 Description LM7812 is 12V voltage regulator locates on power board in this player and is used to generate 12 stable voltage Features Suitable for CMOS TTL the other digital IC s power supply Internal thermal overload protection 2 Internal short circuit current limiting Output current excess of 1 Metal Fin is fully covered with Mold Resin 3 DESCRIPTION m 3 5 16 function introduction to NE5532 1 DESCRIPTION The NE5532 is hig
12. 44 15 SL output waveform diagram after decoding and power amplifier board amplifying Tek vol Lew Tria d Pos 0 000 SAWE REC Action Save mage File Format About 1 Saving i Images select Falder 0 5 10 0 SU us CH1 7 208 Current Folder is 16 SR output waveform diagram after decoding and power amplifier board amplifying Tek Tria d Pas 0 0005 Action File Format About 1 Saving Images select Folder Save 10 04 SOD us CH1 J 208mv Current Folder is 17 Waveform about CS5340 outputs MCLK Tek Tria d Pos 0 0005 AEC Saving Images Select Falder Save TERULDTT BIMP 2 00 50 005 1 83 Current Folder is 4 45 18 Waveform diagram about CS5340 outputs LRCK Tek AL e Stop 0 0005 SAVE REC Action About 1 Savin Images n rm TI select Folder 2 004 10 00 1 35 Current Folder is 4 4 19 Waveform diagram about CS5340 outputs SCLK Tek e Stop Pos 0 0005 SAYE REC Action 1 saving Images select Folder sawa 2 00 100 5 7 1 93 Current Folder is 4 5 20 Waveform diagram about CS5340 ou
13. Vs Positive Power Supply GND GND tanta 3 5 11 function introduction to M62446 1 DESCRIPTION The 62446 is 6 channels electric volume controlled 3 wire serial data The IC is suitable for use in home use audio systems and TV sets 2 Features Electric volume Volume 0dB 79dB dB 1dB step Tone control Bass Treble OdB 10dB 2dB step 4 Output ports Built in microcomputer interface circuit controlled by 16 bit serial data 3 PIN DESCRIPTION 1 1 weon AVdd NM Positive Power Supply GNDS EM SW GND 52 EX A MCN ow ajo m ow em aje mem ow Ce w umeme 1 use 1 om wem o use 1 o naa 1 we nasa 1 Ca 1 Ce mw ow Ce _ _ ow s m sm o me ow em ow e i me Ce mm PIN No Symbol Select control 40 DATA EM Serial Data input DVDD EM Digital Power Supply 3 5 12 function introduction to 2
14. fo wem o sme 2 714 m aft tess m mem o e e o pereo m www aoe om om 1 3 5 22 function introduction to CS49326 1 DESCRIPTION By the CS49236 compressed data can delivered in 61937 format via the S PDIF port and in burst mode via the PC interface PCM data can be accept through digital input connectors or from the on board ADC Six channels of audio are provided on the six analog outputs and on three optical S PDIF transmitters CLKIN for the DSP can be derived either from the on board oscillator or the external PLL MCLK can be extracted from incoming S PDIF streams generated with the external PLL or mastered by audio decoder 74 FEATURES CDB49236 demonstrates 5 1channel decode capability of the CS4923 family 6 discrete analog outputs driven by CS4340 4 S PDIF optical outputs Accepts analog input s PDIF digital input burst compressed data Discrete PLL which can provide multiple sampling frequencies Interfaces to a personal computer through the parallel port v Stake headers provide convenient location for direct writing control signals from off board microcontroller Interface for external memory card Digital analog patch areas 3 DESCRIPTION 10 NN 5 s m omma w
15. PIECE 4000048 SELF TAPPING SCREW PB 3x8 COLOR ZINC C2 109 MATERIAL CODE MATERIAL NAME SPECIFICATIONS LOCATION 4000120 SELF TAPPING SCREW PB 3x10 COLOR ZINC PCB SEMI FINISHED 5448413 PRODUCT 6310T 2 AV311T RU PCB SEMI FINISHED 9310 0 AV311T RU 6 12 PROGRAM CPU 5448415 AV311T RU 0890284 C SM8958AC25P DIP N116 SIGN STICKER CPU311TRU 0 6 13 SN LABEL 0881591 5156402 AV311T RU 5142076 SN LABEL RUSSIA WITHOUT BAR CODE NUMBER 5142067 o 42 U U m lt m Z lt O m 5110002 ELECTRO WELDING WIRE 5110018 ELECTRO WELDING WIRE 5110004 ADHESIVE TAPE C kFsss ws 5110003 ELECTRO WELDING WIRE 5120096 5120004 SOLDERING FLUX _________ YELLOW GLUEWATER BLACK GLUE 3M4799 5120013 5120007 5120011 5120012 RED GLUEWATER SILICONE GREASE HEAT 5120332 GLUEWATER SEALING PAPER COLORLESS HIGH TEMPERATURE MASKING PAPER LENGTH 15 YARD WIDTH 20mm HIGH TEMPERATURE MASKING LENGTH 15 YARD WIDTH 6mm HIGH TEMPERATURE MASKING PAPER LENGTH 15 YARD WIDTH 12mm ips 5120067 5230021 5230022 5230020 5231514 5231454 5231455 MATERIAL NAME SPECIFICATIONS LOCATION HIGH TEMPERATURE Te
16. 8 bit latch Data is shifted serially through the shift register on the positive transition of the clock The output of the last stage QS can be used to cascade several devices Data on the QS output is transferred to a second output Q S on the following negative clock edge The output of each stage of the shift register feeds a latch which latches data on the negative edge of the STROBE input When STROBE is HIGH data propagates through the latch to 3 STATE output gates These 70 gates are enabled when OUTPUT ENABLE is taken HIGH 2 Features Wide supply voltage range 3 0V to 18V noise immunity 0 45 VDD typ Low power TTL compatibility Fan out of 2 driving 74L or 1 driving 7415 3 5 outputs 3 PIN DESCRIPTION emma _ 9 mae B 9 _ Vss WG GND oe m 9 mam mM 9 _ 9 _ 3 5 20 function introduction to CS5340 1 DESCRIPTION The CS5340 is complete analog to digital converter for digital audio systems It performs sampling analog to digital conversion and anti alias filtering generating 24 bit values for both left and right inputs in serial form at sample rates up to 200 kHz per channel The CS5340 uses a 5 order multi bit delta sigma modulator followed by digital filtering and decimation which removes the
17. C to 125 C 2 3 FEATURES Continuous Short Circuit Protection Wide Common Mode and Differential Voltage Ranges No Frequency Compensation Required Low Power Consumption No Latch Up Unity Gain Bandwidth 3 MHz Typ Gain and Phase Match Between Amplifiers Low 8 nVPlz Typ at 1 kHz Designed To Be Interchangeable With Raytheon RC4558 and RM4558 Devices PIN CONFIGURATION PIN No Symbol 51 3 5 2 function introduction to PT2399 1 DESCRIPTION PT2399 is an echo audio processor IC utilizing CMOS Technology which is equipped with ADC and DAC high sampling frequency and an internal memory of 44K digital processing is used to generate the delay time it also feature an internal VCO circuit in the system clock thereby making the frequency easily adjustable PT2399 boast of very low distortion THD lt 0 5 and very low noise No lt 90dBV thus producing high quality audio output The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantage 2 FEATURES CMOS Technology Least External component Auto Reset Function Low Noise No lt 90dBV Typical Low Distortion THD lt 0 5 Typical External Adjustable VCO Available in 16 pins or SOP package 3 PIN CONFIGURATION m VCO Voltage Controlled Oscillator wa 99e Wem e 52 x wa
18. C100 C1020 0000 TERMINAL SOCKET XC100 r 6 10 REMOTE CONEROLLER 1940001 1940002 1910239 1910240 1564307 AV311T RU 5471645 C PT2222 SOP N800 CARBON FILM RESISTOR 1 6W1O 5 SHAPED 7 5 R800 0880220 0000599 108 LOCATION MATERIAL NAME SPECIFICATIONS 0200062 PORCELAINCAPACITOR 50V 15121096 2 5mm C801 C802 0570006 DIODE GLUE BAG FOR ENVIRONMENTAL LED800 VD800 VD802 V800 5800 5070698 WITHOUT HOLE gt 4 2 lt Z o O O 2 w gt D m A 5154818 BOTTOMCASING LABELL AV310T RU SURFACE STICKER OF 5156249 I ENOTE CON FOL AV311T RU 6 11 PANEL UNITS N C2 e AV311T RU 9462353 3003076 AV138 IRON GREY DECORATIVE BOARD 3029795 MIDDLED AV310T RU SILVER WHITE BRONZING DECORATIVE 3072239 BOARD RIGHT AV311T RU IRON GREY 3072001 DECORATIVE BOARD LEFT AV311T RU IRON GREY 3060396 AV138 SILVER WHITE 3072240 avtom RUD LENS COVER 3029208 AV138 TRANSPARENCE 3024848 AV227 SILVER WHITE 3029206 SELECT PRESS BUTTON Javise 3110381 AV138 SILVER WHITE 3110380 Pos PATTON DESOBRATE AV138 SILVER WHITE 5231765 DOUBLE FACED GLUE 3M LENGTH 50m WIDTH 10mm 5233841 3M DOUBLE FACE GLUE Y 9448 105x22x0 15 DOUBLE FACED GLUE 5233014 LABELL 30x12x0 15 3M Y9448 3871295 PRESSING AV310T RU T 0 8
19. R159 R162 R230 R232 R147 00000459 CARBON FILM RESISTOR 1 6 20 5 BELT 27 163 166 184 233 00000469 CARBON FILM RESISTOR 1 6W22K 5 BELT p 00000509 FILM RESISTOR 1 6W33K 5 BELT R175 R177 R201 00000599 CARBON FILM RESISTOR 1 6W100K 5 BELT R130 R131 R158 R204 9 7 MATERIAL NAME SPECIFICATIONS LOCATION R102 R103 R106 R107 R110 R111 R116 H117 R120 R121 R124 R125 R155 R17 0 R174 R176 R178 R180 R182 R187 R2 07 R219 R171 METAL POLYESTER 02101459 FILMCAPACITOR CL21X 100V 104K C5 BELT 103 106 236 237 109 171 5 102 105 129 130 133 166 168 5 C107 C108 C119 C121 C155 C157 C159 02604379 ew 16V10U 20 5x11C5 BELT C161 C204 C170 C110 C112 C113 0114 C115 C116 C117 C118 120 122 123 124 125 147 14 02604389 CD11 16 4 70 20905 11 5 BELT 9 202 203 214 218 224 228 2 30 C231 C244 C153 03901979 INDUCTOR 1009 10 0410 BELT L102 L103 05700049 DIODE 1N4004 BELT VD108 VD109 VD104 VD107 VD110 VD111 VD202 VD 0570006 DIODE 1N4148 103 VD105 VD106 05800069 ner h 5 1V 5 1 2W BELT VD203 05800099 es 9 1V 5 1 2W BELT VD201 98 00000529 CARBON FILM RESISTOR 1 6W47K 5 BELT MATERIAL CODE MATERIAL NAME SPECIFICATIONS LOCATION 05800329 10 5 1 2W BELT VD112 05800459 6 8 5 1 2W BELT VD101 VD102 6 3 DECODE BOARD 07800509 1564008 O m gt AV321T RU 544
20. SDOUT VA AINR 153 3 GND VD VQ 1U 16V104 7 26152 B 1U 16V SCLK HOKE _ LRCK RST 404 VD3 3 12V VA5 C131 5 6V MD2 5 107 C161 C132 p 2016904 10U 16V C13 VD1031N4004 VD3 3 J9 Vvp2 5 C218 101 C215 101 XS14 ON SF LO ON 00 O gt TON CON7 7 7 Nu 5 Figure 3 3 1 3 Decode circuit diagram Note if decode has no output firstly make clear whether digital audio signal has no output if it is only analog signal decode has no output firstly consider whether N108 CS5340 and peripheral circuit work normally after getting rid of it you may consider that whether it is a certain input channel of N105 Works abnormally if it is only digital audio signal has no output firstly judge whether shaping circuit of digital audio signal works normally then check whether N106 and peripheral circuit works normally Abnormal system working may probably affect voltage so in actual working firstly judge whether system power supply is normal Key point waveform mentioned above is also a good reference standard Example 4 Symptom has no output Description after power on insert microphone display has detect the input of microphone but microphone has no output Analysis and troubleshooting after power on insert microphone microphone inputs sine wave signal shown as
21. SO Package PT2315is pin to pin compatible with TDA7315 and is very similar in performance with performance with the later 5 67 Features CMOS Technology Least External Components Treble and Bass Control Loudness Function Input Output External Noise Reduction System Equalizer Independent Mute Function Volume Control 1 25 dB step Low Distortion Low Noise and DC Stepping 2 2 Independent Speaker Controls for Balance Function Controlled by IIC BUS Micro Processor Interface Pin to Pin Compatible with TDA7315 3 PIN DESCRIPTION tease 1 _ Weg ee nam _ MEM C en o eoa 1 pwe o m e 99e fone O 1 same _ 68 20 CLK Serial input 3 5 18 function introduction to CS4360 1 DESCRIPTION The CS4360 is a complete 6 channel digital to analog system include digital interpolation fourth order delta sigma digital to analog conversion digital de emphasis volume control channel mixing and analog filtering The advantages of this architecture include ideal differential linearity no distortion mechanism due to resistor matching error no linearity drift over time and temperature and a high tolerance to clock jitter CS4360 accepts data at audio sample rates from 4 kHz to 200 kH
22. a 6 6 SURFACE CONTROL BOARD 5230928 5230395 AV311T RU 5448413 2100003 CORDS F 0 6 SHAPED 7 5mm W1 W9 2100006 CONNECTION CORDS F 0 6 SHAPED 12 5mm W10 W20 0000122 FILM RESISTOR 1 6W100O 5 SHAPED 7 5 R116 R119 R120 R122 R106 R121 0000133 FILM RESISTOR 1 6W4 7K45 SHAPED 7 5 R108 R111 0000137 FILM RESISTOR 1 6W10K 5 SHAPED 7 5 R101 R102 R117 R118 0000144 FILM RESISTOR 1 6W47K 5 SHAPED 7 5 R107 CARBON FILM RESISTOR 1 2W4 7K 5 SHAPED 12 5 R115 CARBON FILM RESISTOR 1 2W 470 5 SHAPED 12 5 R112 0000608 0000588 0000673 FILM RESISTOR 1 2W2700 5 SHAPED 12 5 R113 0000124 FILM RESISTOR 1 6W4700 5 SHAPED 7 5 R103 R104 R105 METAL OXIDE FILM RESISTOR 1 4W10 5 SHAPED 10 R114 DIGITAL POTENTIOMETER 11 20120 6 5 7 15 RP101 PORCELAINCAPACITOR 50V 221 10 2 5mm C102 C103 C104 0010224 0160193 0200066 0200138 PORCELAINCAPACITOR 50V 104 2096 5mm C101 C106 C115 0200131 PORCELAINCAPACITOR 50V 103 10 5mm C110 C111 C112 C114 0260025 CD CD11 16V47Ux20965x11 2 C105 C109 C113 0580026 30 5 1W VD101 0580073 5 1V 5 1 2W SHAPED 10mm VD102 0260232 0260233 0390168 0570004 g O m g O m 104 MATERIAL NAME SPECIFICATIONS LOCATION 0620040 RADIATION DIODE 3B 4SC WHITE ISSUE BLUE VD104 VD105 5P50 2 5 2 PIN WITH L NEEDLE SM HEAD 2121589 FLAT CABLE TOGE
23. common means is change base electrode resistance of V107 it may also automatically adjust working state of composite power amplifying stage after temperature increases The adjustment process is as follows Total current of output level working current leakage current When temperature becomes high leakage current increases to lead to static working point drift unfavourable At the same time the leakage current of V106 increases Uce decreases to make bias current of output level decrease working state changes working current of back stage decrease and temperature compensation function is realized In power amplifying circuit of AV321T RU voltage negative feedback is introduced and composed by R121 R109 C105 which may stabilize static working point of differential level AV321T RU adopts direct output means 111 and C116 connected on output end compose Zobel network which prevent high frequency self excitation caused by AC inductive reactance of speaker sound coil 2 Mute circuit When pressing MUTE button on remote controller after optical electric conversion of signal conducted by infrared receiver a mute signal is achieved and sent to MCU P LRM high level and P CSM low level mute order is sent out from MCU at the same time P LRM high level makes 2N5401 V115 58050 V101 58050 V116 on left and right channel signal are short circuited to ground and mute control function of left right channel finishes P CSM
24. field processing through Xp17 and N102 is also in working state 2 Karaoke signal processing circuit For karaoke signals sent from MIC base board after coupling and amplifying one path is sent to volume and tone adjustment IC PT 2315 N203 for processing then after echo and delay adjustment 4D s through PT 2399 N204 it is sent to power amplifier board for small signal amplifying through band Pass filter PT 2315 is controlled by MCU so users may adjust his desired Karaoke effect at will through remote controller Another path signal after amplifying rectification controls a switch triode V201 9014 to control the high low level of detect signal P KT to fulfil the detecting of Karaoke signals When the inputted Karaoke signal is large enough the DC after being rectified makes triode V201 on and then pulls down P KT signal which means that there is Karaoke signal input Now KM control signal is low level triode V101 2N5401 V102 8050 both cut off Karaoke signals enter N107 5532 for amplifying through coupling capacitor C147 C149 then they are sent to left right channel when CPU cannot detect signals in a certain period P KT is high level now KM control signal of CPU changes into high level triode V101 V102 are both on to make Karaoke signal short circuit to ground system mutes Karaoek part automatically to prevent the influence to sound effect caused by noise 3 Fan starting circuit When power amplifier is wit
25. low level makes 9014 V150 cut off 2N5401 V130 and 58050 V131 are on center channel signal is short circuited to ground and mute control function of center channel finishes at the same time CSM low level makes 9014 V151 cut off voltage of pin 5 of TDA7265 os power voltage TDA7265 internal mute circuit works to reach surround channel mute effect 3 C SR SL power amplifying circuit Compared with the former models the three channels of AV311T RU adopt special audio power amplifying IC CD1875CZ 104 and TDA7265 N106 As for TDA7265 N106 it has 11 pins in all pin 3 1 and 6 are its positive negative power pin pin 11 and 7 are its in phase input terminal pin 10 and 8 are its reverse input end the rated output power of each channel of this power IC may be up to 15W with auto mute function when power on as for CD1875CZ N104 it has 5 pins in all and is a good performance power amplifying IC with 15W power output in rated state pin 5 and 3 are positive and negative power pin 25 4 Protection circuit Protection circuit of power amplifier of AV321T RU is designed on power board The protection means of L RH C channel is fulfilled through disconnecting delay Y100 when starting up to disconnect the output SR SL channel achieves protection function through mute AV321T RU is with power on delay protection central point over voltage and over current protection standby protection 1 Power on delay attr
26. need for an external anti alias filter 55340 is ideal for audio systems requiring wide dynamic range negligible distortion and low noise such as set top boxes DVD karaoke players DVD recorders A V receivers and automotive applications 2 FEATURES Advanced multi bit Delta Sigma architecture 24 bit conversion Supports all audio sample rates including 192 2 101dB Dynamic Range at 5V 94 dB THD N High pass filter to remove DC offsets Analog digital core supplies from 3 3V to 5V Linear phase digital anti alias filtering Auto mode selection Pin compatible with the 55341 3 PIN DESCRIPTION ow or wa memi ow or mew samana 15 GND GND m mmm EN NEN x mm o m o me mmn _ ww 2729 3 5 21 function introduction to CS8415 1 DESCRIPTION The CS 8415A is a monolithic CMOS device which receives and decodes one of 7 channels of audio data according to the IEC60958 S PDIF and EIAJ CP 1201 interface standards or one channel of AES3 data The CS8415A has a serial digital audio output port and comprehensive control ability via a 4 wire microcontroller port Channel status and user data are assembled in block sized buffers making reading access easy low jitter clock recovery mechanism yields a very clean recovered
27. output C121 have signal power supply Y Y Check Change N104 whether voltage of power board R100 is normal Change VD113 Check whether signal board x 12V voltage is normal Y Change relay Check power circuit 2 I Change signal board 107 Figure 3 3 2 3 Troubleshooting flow chart for No output 2 channels sg 4 Troubleshooting process for VCD channel has no output is shown as in the following Figure 3 3 2 4 VCD channel has no output Switch Check to DVD channel N whether pin 3 N and check whether there and 13 of signal board Change N101 is output N10have waveform Y Y Input Check Check VCD channel and check whether pin 4 whether signal N whether voltage N 11 of signal board N101 Change VCD input terminal board C119 C121 has of pin 42 of N104 is Refer to troubleshooting of voltage have waveform waveform normal Y Y Y Change N104 whether 12V power supply of pin 4 8 Refer to troubleshooting of voltage of N106 and N107 is normal Change N106 and N107 Check Change N101 whether pin 2 3 of signal board flat cable holder XS9 has waveform Check uii whether power N boar as phenomena T ME of rosin joint fallen welding ia eds C101 Check mute circuit and copper piece signal Y Y
28. pin 25 sampling speed control signal pin 26 clock signal 22 PCM data input port 4 03 1 of digital audio decode IC Cs493264 N105 for data processing Analog signals of left right channel are sent to decode board through flat cable Xs17 after front stage small signal processing then sent to pin 10 12 of IC Cs5340 N108 for A D conversion to change analog audio signal into PCM signal then sent from pin 4 audio PCM signal 17 sampling speed signal 18 clock signal of N108 to pin 27 28 29 of N105 that is input from another PCM input port of N105 for data processing Therefore digital sound field processing of analog signal and processing of coaxial optical audio digital signal are separate if only one path works abnormally the possibility that problem appears before N105 is large CS493264 N105 is with powerful digital sound field processing function all DSP processing Pro Logic Il processing and DOBLY AC 3 processing are all performed inside under the control of MCU SM8958AC25P N116 Audio PCM signal after being processed by 5493264 N105 is sent to CS 4360 N107 for D A conversion to restore PCM signal into 6 channel analog signal then filter high frequency signal outside the range of audio frequency through a band pass filter then sent to input gating part for selection input Acted as he core of the whole system MCU SM8958AC25P N116 has important function All control signals are sent out by it and it
29. produced 126 127 will increase once the pressure drop of R129 on power amplifier board is more than 0 7 V114 will be on V103 will also be on relay disconnects finally and short circuit protection completes The working process is shown in the figure 3 2 5 3 Over current Rel When over current C electrode PAY sampling triode channel r ess re dronon gt gt disconnects is connected to V114 4 26 R127 V114ison 5 o and protection gt V103ison each channel increases starts up Figure 3 2 5 3 Short circuit protection flow chart Similarly when R channel has over current voltage on R159 on power amplifier board will be more than 0 7V to make on power amplifier board V129 on also to make V103 on and relay disconnect finally to achieve the purpose of protecting loudspeaker 3 2 6 Video input output board AV321T RU is with two channel composite video input VCD DVD or 5 1CH two channel S video video input VCD DVD or 5 1CH 1 channel composite video output VCD DVD or 5 1CH 1 channel S video video output VCD DVD or 5 1CH Input output switch of video signal is realized through two electronic switch Cd4052 N100 N101 When VCD channel is selected pin 1 and 2 of N104 M62446 of signal processing board send out A and B high level control signal according to working principle of signal processing board in section 2 now A and B also control gating of CD4052 of audio part that is audio channe
30. whether power Check board PCB has phenomena whether power N N Change relay Refer to troubleshooting of voltage amplifier board VC is normal of rosin joint fallen welding and copper piece Figure 3 3 2 4 Troubleshooting flow chart for VCD channel has no output 38 5 Troubleshooting process for DSP has no output is shown as in the following figure 3 3 2 5 DSP has no output digital input or analog input and check whether there is no output Change signal board N111 N Chec whether pin 10 12 of decode board N108 has signal Test whether R128 and R131 have waveform whether 45V 3 3 and 2 5V of decode board power supply voltage is normal whether signal board C108 and C107 have waveform Y Analog signal has output whether N108 power supply is normal whether RST is normal Whether N111 power supply is normal Y Refer to troubleshooting N process for voltage Change N108 Change N111 Check whether voltage of decode board 102 is normal Change decode board N106 Input optical signal Test whether decode board L121 voltage is normal Y board L119 has signal Disconnect decode board resisto R155 test whether two ends of resistor R155 have waveform signa Refer to troubleshooting process for voltage Test whether decode boa
31. 101 C105 47K 473 47K 10u 16V R107 10 ses Y R106 X100 10K 9 O P RLY 574 5VD 652 3 DGND 6 8050 O e um Nn EEN su sw O GND 47K PH L O 2 1 N100B 5 LM4880 C107 3 beue 330u 16V sed C104 10u 16V R110 R102 47K R108 10K 473 47K C100 103 C101 103 1 8 N FL100 T6 3AL250V C102 7 472 N N 2 OVER P_RC ea IN4148 R101 2 2u 16V xs2 TO SWITCH I TO TRANS CON2 VD113 1N4004 R102 C126 9014 R100 L 47 3W C100 22n VD100 1N5404 VD101 1N5404 VD102 1N5404 FL101 From TRANS VD103 1N5404 VD104 1N5404 VD105 1N5404 VD106 1N5404 VD107 1N5404 C110 100u 35V VD110 IN4148 1 106 108 4 7K F 1 C115 47U 25V A7 C113 Niw c9o14 NT 20u 16V C114 220u 16V RELAY 4 XL101A XL101A VD112 WP6 WP6 1N4148 L cios 8200u 63V C106 _ __ 109 C107 8200u 63V C123 103 C112 103 XL101A I prog AHMOd 6 2 5 S6 C103 47u 100V R117 lios 1 100 0 5 2 R113 in K V112 4 150 2SD1047C mm R128 V114 2N5551 C101 R101 R103 4 3 R126 129 is 10u 16V 0
32. 2 in CD L 4 e 6 L103 100uH 42 03 100u N B 9 A 6 8V m 41 CLK A10 40 5 1CH H 39 LAT a x C134 c135 10u 16V dos 7 47ul6V is 4 7u 16V C107 1 2 36 113 SW 1 10u 16V x 35 C114 4 7u 16V 34 91 1 33 mE CA ER 32 zu mc END 3 C121 10u 16V A 68V R149 4K7 C137 47n C123 bip C124 15 i SE 4 7u 16V e 16 2 IS C125 17 AE 47016 1 ic 26 P 25 C139 19 THAG 24 822 140 1 1 5 u m 23 5n C141 0 33u 15 SL I R150 4K7 102 04053 From Audio Decoder N103 CD4053 L M XCIO3B 12V 1 Lua SZ R115 1K d SIRE A 6 8V R138 220 0 5W R137 220 0 5W SL m VD101 VD102 6 8V 6 8V 9 3 C131 47n 47u 16V C132 47n XC103C Z prog IVNDIS C 68 12V R205 C210 47 16 203 PT2315 100 0 25W T 20 OK_CLK 19 OK_DAT 18 VD201 C211 JAV 17 pod R218 20K R219 47K 4 7u 16V s 16 214 201 151 bye 100u 16V 68n 14 C217 68n C202 4 7u 16V R201 33K JUD L BNI SEM R202 4 7K 4 74 16 4 7u 16V 4558 10u 16V C205 10P R204 100K C228 4 7u 16V C229 T
33. 200174 PORCELAINCAPACITOR 50V 103 10 2 5mm C100 C101 0000133 FILM RESISTOR 1 6W4 7K 5 SHAPED 7 5 R103 R104 R100 R105 0000137 FILM RESISTOR 1 6W10K 5 SHAPED 7 5 R107 R108 R106 0000144 FILM RESISTOR 1 6W47K 5 SHAPED 7 5 R101 R102 R109 R110 R111 0390168 INDUCTOR 1000 10 0410 SHAPED 12 5mm L101 2110484 LEAD 22 140mm BLACK WITHf WELD PIECE XJ1 1980006 1980030 1563524 gt lt Y 31075 MATERIAL CODE MATERIAL NAME SPECIFICATIONS LOCATION 6 9 VIDEO FREQUENCY BOARD AV311T RU 5448416 2100003 CORDS F 0 6 SHAPED 7 5mm W1 W2 W3 W4 W5 W6 W9 W12 2100006 CONNECTION CORDS F 0 6 SHAPED 12 5mm W7 W11 2100007 CONNECTION CORDS F 0 6 SHAPEN 15mm W8 2100010 CONNECTED CORDS F 0 6 SHAPED 5mm W10 0260019 CD CD11 16V10U 20 5x11 2 TC101 TC102 TC105 T YTIH WNIX Z GUGPUCGCC IC RINIUTTTTITED 0780043 TRIODE esawots f vt00 V401 vioz rone ku 000 rone bx 0000 0580047 TOE 7 5V 5 1 2W VD100 VD101 DIODE 0000137 CARBON FILM RESISTOR 1 6W10K 5 SHAPED 7 5 0000132 FILM RESISTOR 1 6W2 2K 5 SHAPED 7 5 0000599 FILM RESISTOR 1 6W1O 5 SHAPED 7 5 0000122 CARBON FILM RESISTOR 1 6W100O 5 SHAPED 7 5 0210147 TERYLENECAPACITOR 100V 47331095 5mm C100 c1020 0 000 0210025 TERYLENECAPACITOR 100V 473 5 6mm
34. 210976 0603 54 158 159 162 163 168 170 171 182 192 193 194 195 196 C197 C200 C201 C207 C208 C209 C101 C211 0210 C214 C217 C156 L101 L102 L104 L105 L106 L107 L108 L 0390044 SMD INDUCTOR 10UH 10 2012 109 L110 L111 L112 L113 L114 0700007 SMD DIODE 1N4148 VD101 VD104 VD105 0880165 74HCU04D SOP N101 100 R111 R118 R120 R121 R123 R126 R129 1 16W 10K 5 0603 H132 R135 R140 R141 R144 R147 R15 AV321T RU 5447863 2100003 CORDS F 0 6 SHAPED 7 5mm 76 W8 W9 W15 W21 W24 W36 W37 W45 2100004 CONNECTED CORDS F 0 6 SHAPED 10mm W46 W48 W51 W57 W63 W69 W71 W7 4 W80 zo cowecnowconos WEM IOTER ZW woa 0040069 RESISTOR 7W0 25O 5 SQM SHAPED R 10x5 R126 R127 R156 R157 0000128 FILM RESISTOR 1 6W8200 5 SHAPED 7 5 R170 R174 R178 0000129 FILM RESISTOR 1 6W1K 5 SHAPED 7 5 0000130 FILM RESISTOR 1 6W1 2K 5 SHAPED 7 5 R115 R145 0000133 FILM RESISTOR 1 6W4 7K 5 SHAPED 7 5 R161 R166 R167 0000137 FILM RESISTOR 1 6W10K 5 SHAPED 7 5 R101 R131 R162 R163 R168 0000139 FILM RESISTOR 1 6W20K 5 SHAPED 7 5 R164 0000141 FILM RESISTOR 1 6W27K 5 SHAPED 7 5 R176 R171 0000144 FILM RESISTOR 1 6W47K 5 SHAPED 7 5 R104 R134 R165 R169 R1 72 0000146 CARBON FILM RESISTOR 1 6W100K 5 SHAPED 7 5 R102 R132 000276 FILM R
35. 220 0 5W Figure 3 3 1 5 Power amplifier circuit diagram Note when a certain channel has no output firstly make sure voltage of each channel power amplifying circuit is normal Generally test stage by stage from final stage of signal output and analyse the reasons For voltage is unstable power IC is easy to burn down machine vibrates in the course of con which may break the line of PCB board of signal board or make copper piece of element pin fall off When analysing questions we should consider Example 7 Symptom no screen display Description after power on relay attracts output signal is normal VFD has no display Analysis and troubleshooting connect to power test voltage of panel XS10 and it is normal change VFD display screen display is normal and trouble is removed 33 Note when no screen display appears firstly make clear whether voltage of display screen is normal whether display drive is normal VFD screen is vacuum packaged and it is easy to damage so in most conditions it is the screen that has been damaged Example 8 Symptom power not on Description no action after power on relay does not attract no screen display Analysis and troubleshooting power on observe each fuse and it is normal test secondary stage voltage of transformer and it is 0 test primary stage voltage of transformer and it is normal test primary resistance of transformer and it is infinite so we judge that transformer
36. 25 7W 2 7K R111 8114 0 K R102 R104 33K 0 5W 100K 47K V106 2 5551 115 vier R122 100 0 25W 4 3K qu C146 C148 L7812 2204 28 5 3 100u 16V 1N4148 R183 510 VD103 1N4148 47u 100V Vs C113 47u 100V 220 0 5W V134 R143 K V127 2501047 mem isi 158 15 2W C147 N102 C149 220u 25V L7912 100u 16V V129 2N5551 V115 2N5401 4 3K R156 R159 0 25 7 N 2 7 1K R150 100 0 25W 10u 16V R141 33K 0 5W 2N5551 R145 Tn x R152 100 0 25W 58050 Giai R162 K R132 R134 TT 10K 116 NP 100K 47K 142 V122 2N5551 4 3K qu 1N4148 510 VD106 1N4148 47u 100V XS8 220 0 5W 12 3 155 47 R182 33K N105 C131 LM1876 22u 16V C129 1u 50V C130 1tu 50V VD111 C139 C141 1 5404 47n 4700 35 104 LM1875 4 7K C122 22u 16V 22u 16V C140 C142 47n 47004 35 1 5404 T6 3A250V ae 23 C132 22u 16V 22u 16V 820 II C156 47p R185 33K peog AHMOd OT Chapter six BOM List MATERIAL NAME SPECIFICATIONS LOCATION 6 1 SIGNAL DISPOSAL BOARD MATERIAL CODE AV311T RU 5447861 CD CD11 10V1000U 20 8x16 3 5 C173 CD CD11 16 2200 20 10x30 5 C150 INDUC
37. 4 02 1 Description The AT24C02 provides 2048 bits of serial electrically erasable and programmable read only memory EEPROM organized as 256 words of 8 bits each The device is optimized for use in many industrial and commercial applications where low power and low voltage operations are essential The AT24C02 is available in space saving 8 lead PDIP 8 lead 8 lead TSSOP and 8 ball dBGA2 packages and is accessed via a 2 wire serial interface In addition the entire family is available in 2 7V 2 7V to 5 5V and 1 8V 1 8V to 5 5V versions 2 Features Low voltage and Standard voltage Operation 2 7 VCC 2 7V to 5 5V 1 8 VCC 1 8V to 5 5V Internally Organized 256 x 8 2k 2 wire Serial Interface Schmitt Trigger Filtered Inputs for Noise Suppression Bi directional Data Transfer Protocol 100 kHz 1 8V and 400 kHz 2 5V 2 7V 5V Compatibility Write Protect Pin for Hardware Data Protection 8 byte Page 1K 2K Write Modes Partial Page Writes are Allowed self timed Write Cycle 5 ms max High reliability Endurance 1 Million Write Cycles Data Retention 100 Years Automotive Grade Extended Temperature Lead Free Devices Available 8 lead PDIP 8 lead SOIC 8 lead MAP 5 lead SOT23 8 lead TSSOP and 8 ball dBGA2 Packages 64 3 PIN DESCRIPTION wa j 1 RN est m
38. 5 cut off power supply loop of fan is cut off when volume is over 45dB fan rotation is forbidden to facilitate to listen with headphone When no headphone is inserted MCU detects that SW signal is low level the corresponding control signal P LRM is low level P RC controlled by CPU changes into low level relay on power board attracting RLYO of power board is pulled down to OV P RLY control signal changes into low level triode V101 58050 cuts off pin 5 of headphone amplifier N100 has OV voltage input headphone amplifier is in standby state Central and surround channel of signal board volume adjustment IC N104 M62446 is opened to make power amplifier output signal and drive loudspeaker 28 Section Three Servicing Cases 3 3 1 Servicing cases Example 1 Symptom power on protection Description after power on relay does not attract and system abnormal auto protection displays Analysis and troubleshooting after power on system protects relay does not attract shown as in the figure 3 3 1 1 test L R C SL SR of power board flat cable holder XP8 and there is no DC output test pin 1 of power board flat cable holder XS7 it is high level pin 2 is low level C electrode of triode V101 is high level it is known from the above test that the protection is not caused by over current and over voltage you may also unplug flat cable holder XP7 and XP8 and check whether it has protection Test positive voltage o
39. 8412 IC 24C02 DIP N115 IC NE5532 DIP 111 112 113 114 CD CD11 16V100U 20 6x12 2 5 C129 C131 C134 0880664 0882223 0260027 137 138 139 140 141 142 164 CD11 16V10U 20 5x11 2 0166 0169 0175 0178 0181 0184 C18 0260019 CD 7 C190 0260025 CD CD11 16V47Ux20965x11 2 C172 0198 C199 C212 0260067 CD CD11 50V2 2U 20 5x11 2 C117 106 112 116 122 123 125 135 0260126 CD11 16V1U 20 5x11 2 144 147 148 149 152 155 15 7 0100008 RESISTANCE NETWORK 1 6W 4 7 5 RR102 RR103 RR104 RR105 SMDMAGNETIC BEADS L103 L115 mes 6 4 DECODE BOARD SMD 0390353 0570004 0780032 0960182 1940007 1940029 1940030 1940171 1850005 0890284 5446068 AV321T RU 5446068 0090001 SMD RESISTOR 1 16 5 0603 R165 R163 0090006 SMD RESISTOR 1 16W 75O 5 0603 R115 R116 R117 MATERIAL NAME SPECIFICATIONS LOCATION 0090181 SMD RESISTOR 1 16W 1000 5 0603 R154 R162 R164 R166 R167 R168 R169 0090011 RESISTOR 1 16W 4700 5 0603 8170 8171 8173 8174 8178 8180 0090014 SMD RESISTOR 1 16W 1 5 0603 R176 0090015 5 RESISTOR 1 16W 1 2K 5 0603 R119 0090019 SMD RESISTOR 1 16W 4 7K 5 0603 R105 R108 0090023 SMD RESISTOR 9 R177 H156 R161 C105 C108 C109 C110 C111 C113 C115 118 121 124 126 127 128 13 0 143 145 146 150 151 153 1 0310057 SMD CAPACITOR 16V 104
40. AV3111 service manual Catalog Chapter One About Maintenance eene 1 1 4 Satety DIGCaHtigfis ________________ 1 1 16 Power ___________________ __ 77 1 id 9 Precautoneforantisialle eese D E e ean wee 1 1 1 3 About placement position eee 2 j owainitenancedqmellod megan data tenus _________ _______ _ 2 Sus 2 122 resistance melHod 2 1 2 3 Voltage method 2 O 2 1 2 5 Cutting method 2 Tp e Elements bsitution meho E 3 1 2 7 Comparison method eee eee eee 3 1 3 Required device for maintenance eene 3 Chapter Two Functions and Operation Instructions mem 4 ml nor 4 2 2 Control button Locations and Exp Lanationg eee eee 5 2 2 1 Front panel functions and illustrations sse 5 SS Si ED DIS PLA a TE E 5 5 23 REAR PANEL ILLUSTRATIONS aa 6 7 DG BAGIC OPERATIONS 8 53 ee ee er ______________ ee eee 8 mmt 8 2 3 3 Select Input Sound Source and Video lt 8 A Gallec Decode ______ __________________ 9 2 3 5 Adjust Volum
41. C in it Example 2 Symtopm no sound output Description power on after system resets normally switch each sound source and there is no output select decode and there is no output Analysis and troubleshooting after power on select VCD channel input sine wave signal shown as in the figure 3 3 1 2 test volume board capacitor C119 C121 and there is no signal test signal board capacitor C122 C124 and there is still no signal pin 4 11 of N101 has signal test power voltage of pin 7 16 of N101 and it is normal pin 3 13 of N101 has no signal so we preliminarily judge that N101 has input but has no output we judge that N101 has no trouble test pin 9 of N111 and it is high level we judge that this channel is not gated signal A B of N104 has trouble Change N104 after changing output is normal and trouble is removed N101 CD4052 TUNER 814 DVD R 15 2 CD R 11 X3 TUNERL 5 DVD L 2 Y2 CDL yop I A 6 8v NH 5VD mE C133 22K 47n 47u 16V L103100uH OUT4 DVDD vss 8 gt 4052 8 9 B CLK VEE LA 6 8 OUT3 CLK 4052 0 40 OUT2 DATA P OUT1 LATCH 0 X x AVDD DGND Der X3 E 2 swin AGND T 107 104 SW 1 MI YO GNDS mezas SWOUT ECH perui gt SR 1 10u 16V Y2 s SRIN SROUT iiey SL 1 a SLIN SLOUT 33 4 CA GNDC COUT CAA 4 7u 16V C119 10u 16V 1
42. CH1 1 00 500 us CHI 1000 Current Folder is 4 Waveform diagram of pin 3 of XS9 Tek Trig d Pos 0 0005 SAVE REL Beton select Falder Save TEROULDS BIMP 1 00 SU us 100 uv Current Folder is 5 Waveform diagram of pin 1 of XS8 Tek Al e Stop Pos 0 0005 SAVE REC ER File Format BMF About saving Images select Folder Save TEROOOS BMP 20 0 500 us CH1 41rmv Current Folder is zu 6 Waveform diagram of pin 2 of XS8 Tek top Fos 0 0005 REC Action File Farrnat saving Images select Folder Save 20 0 SU us CH1 Current Folder is x 7 FLwaveform diagram n DSP decode state Tek El Trig d Pos 0 000 SAVE REE File Format About 1 Saving Images select Folder Save BRP 500 1 00 gt 0 00 Current Folder is 8 waveform diagram in DSP decode state Tek JL Tria d Pas 0 0005 t WWwww Select Folder Save TERKOOOS CH1 500 1 0 rns CH1 J 0 00 Current Folder is 42 9 C waveform diagram in DSP decode state Tek A Trig d Pos 0 0005 Action Aj WA AN m select Folder Save TERDUD3 BI4P 5 m v 1 00ms CH1 J 0 00 Cu
43. ESISTOR 1 4W1000 5 SHAPED 10 R120 R122 R150 R152 0000475 FILM RESISTOR 1 6W2 7K 5 SHAPED 7 5 R159 i 0000495 FILM RESISTOR 1 6W4 3K 5 SHAPED 7 5 R128 R130 R158 R160 zoe 20 O 2 C1 O 2 A 2 cO 0210030 TERYLENECAPACITOR 100V 104 10 7mm C143 C144 0210029 TERYLENECAPACITOR 100V 104 5 7 C143 C144 C102 C106 C109 C112 C116 C119 C127 0210147 IERYLENECAPACITOR 100V 473 10 5mm 128 139 140 150 151 134 15 71 000 102 106 109 112 116 119 127 0210025 100 473 5 6mm 128 139 140 150 151 134 15 7L U 0260039 CD CD11 25V47U 20 5x11 2 C135 C136 0260021 16V22U 20 5x11 2 C121 C122 C123 C125 C131 C132 260063 CD CD11 50V1U 20 5x11 2 C110 C120 C129 C130 C137 0 0260163 CD CD11 50V47U 20 6x12 2 5 C103 C107 C113 C117 0 260134 CD CD11 25V4700U 20 16x35 7 5 C141 C142 9 0260135 CD CD11 25V4700U 20 16x40 7 5 C141 C142 CNN CNN 0780255 TRIODE 25 940 V133 V1350 000 0780257 TRIODE KSA940 V133 V135 000 a102 DIODE ea me em fess caro 103 MATERIAL CODE MATERIAL NAME LOCATION SPACERGET 5232281 INSULATED SPACER SET TIS ewe SPONGE SPACER _ mezassmarracensort
44. L w ow _ qo o o Po leers _ cs e _ sex 0 _ v es 0 _ Sia 0 High Voltage Segment Output Pins Sess Also acts as the Key Source x es m es s es 57 2 s 9 www sem ww saas O High Voltage Segment Output Pins Also acts as the Key Source SG18 KS18 SG19 GR10 SG20 GR9 Logic Power Supply Pull Down Level High Voltage Segment Grid Output Pins High Voltage Grid Output Pins High Voltage Grid Output Pins Logic Power Supply LED Output Pin Oscillator Input Pin 2 58 3 5 7 function introduction to UTCLM4880 1 DESCRIPTION The LM4880 is dual audio power amplifier capable of delivering typically 250mW per channel of continuous average power to an 80 load with 0 1 THD N using 5V power supply The UTC LM4880 features an externally controlled low power consumption shutdown mode as well as an internal thermal shutdown protection mechanism The unity gain stable UTC LM4880 can be configured by external gain setting resistors 2 FEATURES bootstrap capacitors or snubber circuits are necessary Unity gain stable External gain configuration capability 3 PIN DESCRIPTION o nom 2 n cr E NEN RH eee 9 9 to 3 5 8 function intro
45. THER DIRECTION XP10 emm LIGHT TOUCH RESTORE 1340003 HORIZONTAL 6 6 1 5101 5230074 SOFT SPONGE SPACER 25 12 5 DOUBLE FACED HARD VFD PCB 5231493 SOFT SPONGE SPACER 12 10 9 DOUBLE FACED HARD PYROCONDENSATION 5233838 SLEEVE F 22 UL 1564154 6310T 2 6 7 POWER BOARD AV311T RU 5448414 2100003 CORDS F 0 6 SHAPED 7 5mm W14 W16 W17 W22 0260067 CD CD11 50V2 2U 20 5x11 2 C126 0260028 eo 16V220U 20 6x12 2 5 C113 C114 2 260039 CD CD11 25V47Ux20965x11 2 C115 0260233 CD CD11 35V100U 20 8x12 3 5 C110 0260572 CD293 63 15000 20 35x70 10 C108 C109 105 DIODE 106 MATERIAL CODE MATERIAL NAME LOCATION 2010003 POLE SOCKET WP410A 00000000000 XL100 2010004 CONNECTION POLE 00000000000 XL101 3540076 SCREEN SHIELDED PIECE FUSE HOLDER FL101 FL102 NOT DMETAL OXIDE FILM 18 3 AL250V 3870591 3870057 5180388 RESISTOR GLUE LABELL NOT DMETAL OXIDE FILM RESISTOR GLUE LABELL 8Ab 250V FL101 FL102 PCB 5100 5 CQC 6 8 MICROPHONE HOLDER BOARD 5180263 1564105 5448415 IC LM4880M SOP N100 CD CD11 16V10U 20 5x11 2 C103 C104 C105 0260027 CD CD11 16V100U 20 6x12 2 5 C102 0260214 CD CD11 16V330U 20 8x12 3 5 C106 C107 0200077 PORCELAINCAPACITOR 50V 10221096 2 5mm C110 C111 AV311T RU 0882398 0260019 0200138 PORCELAINCAPACITOR 50V 104 2096 5mm C108 C109 0
46. TOR 100UH 10 0307 SHAPED 12 5 L101 POLYPROPYLENECAPACITO 0881743 0882161 0880445 0880230 0880417 0881430 0881429 0880443 0882223 0880807 0881380 0882154 0260015 0260303 0390425 0200310 50 103 10 SHAPED 5mm C176 2120709 FLAT CABLE 7P90 2 5 2 SOCKET WITH NEEDLE XP14 9 260 2 5 2 PIN WITH NEEDLE TOGETHER 2121674 FLAT CABLE DIRECTION XP17 10P260 2 5 2 PIN WITH NEEDLE 2121676 FLAT CABLE TOGETHER DIBECTION XP16 2120622 FLAT CABLE 2P140 2 5 2 SOCKET WITH NEEDLE XS22 2122009 FLAT CABLE 3P140 2 5 2 PIN WITH NEEDLE REVERSE 20 2121675 SOFT FLAT CABLE 1940003 96 5447420 1310T 2 AV310T RU 2 AI SEGMENT AV311T RU 5447420 a 2100017 CORDS F 0 6 SHAPED 20mm W7 W13 00000029 CARBON FILM RESISTOR 1 6W10 5 BELT R151 00000099 CARBON FILM RESISTOR 1 6W1000 5 BELT R141 R188 R189 R152 00000199 CARBON FILM RESISTOR 1 6W6800 5 BELT R185 R101 R104 R105 R108 R109 R112 R115 00000229 CARBON FILM RESISTOR 1 6W1K 5 BELT H118 R119 R122 R123 R126 R172 R20 3 R206 R221 R139 00000289 CARBON FILM RESISTOR 1 6W2 7K 5 BELT R226 R227 00000349 CARBON FILM RESISTOR 1 6W4 7K 5 BELT R142 R143 R144 R202 R149 R150 R222 00000369 CARBON FILM RESISTOR 1 6W5 6K 5 BELT R210 00000409 CARBON FILM RESISTOR 1 6W10K 5 BELT d R186 R148 00000419 CARBON FILM RESISTOR 1 6 12 5 BELT R228 00000439 CARBON FILM RESISTOR 1 6W15K 5 BELT
47. US R206 1K 1N4148 C220 47u 16V C239 0 22u 220 0 5W 47u 16V VD203 5 1V c S 06 XS12 P 5V DGND L 1 OK V101 R142 2N5401 1N4148 XS21 CON3 1N4148 R14 FAN E 5 es in 9014 8144 5 4 105 N ix 58050 4 7 516 VD108 1 4004 150 2200u 16V VD109 1N4004 R171 47K L R147 15K R172 1K 154 C155 10u 16V C156 47P R173 22K R156 20K 174 47K C157 10u 16V Z C1 eL 12v C158 47P C147 R157 20K R175 33K 4 7 16 C159 10u 16V R159 15 L _ R176 47 C160 47P R161 20K R177 33K 34 R1 C149 4 7u 16V C161 10u 16V R162 15 12V C162 47P R179 22K R188 100 511 N108B R163 20K 5532 P R180 47 164 47 R181 22 R189 100 SR1 47 7 C151 104 N109 AMS1085 5 LINE OUT 1 104 SW OUT R187 ci 47K NZ 59 SWM CON7 lt From AMP Board P 12V 12V C166 C167 47u 16V 104 C168 C169 47u 16V 104 ov 12V C176 103 x 2173 1000 16 104 5 c S 6 XS100 12V DGND R100 12V N100 CD4052 CON3 VCD
48. ability 1kHz Rated Condition gt 4098 Total Harmonic Distortion 1kHz Rated Condition lt 0 7 Effective Frequency Range under Limited Gains Normal Working Condition Main Channel 20Hz 20kHz 4 dB Centre Surround Channel 20Hz 20kHz 1 dB 5 Signal to Noise Ratio Main Channel Input 6000 Short Circuit A weighted gt 80dB Centre Channel Input 600Q Shout Circuit A weighted gt 7398 Surround Channel Input 600Q Shout Ciucuit A weighted gt 3dB 60 TUNER Frequency range FM 65 74MHz 87 108MHz AM 500 1611KHz 9K STEP 520 1710KHz 10K STEP 7 Input Sensitivity Rated Condition lt 100mV 81 Load Impedance All 4 80 POWER 1 Power Supply 220V 10 50Hz 2 Maximum Power Consumption 500W OTHERS 10 Net Weight About 8kg 2 Dimensions 420x 337x 135mm Chapter Three Unit Circuit Principle Section One Principle ofthe player AV311T RU is an advanced power amplifier launched into market recently It is with DTS AC 3 digital decode function which makes sound processing more perfect to effectively control the distortion and noise in the course of audio signal 3 1 1 Composition of the player 1 Signal processing board gating front stage amplifying of signal and front stage processing of Karaoke signal 3 Control panel VFD display menu button and main volume control 4 Power board provide voltage required by each unit circuit and perform the player protection function 5 Power amplifier board powe
49. above 3 seconds and the unit restores the channel level and Karaoke volume parameters to default Parameters Call default parameter 2 3 10 Karaoke Insert the microphone into the MIC jack on the front panel and push the MIC switch to ON if there is switch Keep an appropriate distance With speaker to avoid whistle Menu and MIC jack 1 Karaoke volume There are two means to adjust Karaoke volume remote control and menu Hemote Control Means Press KARAOKE VOLUME button on the Hemote control Menu Means Press MENU button on the front panel until MIC VOL appears and then rotate the MULTI FUNCTION knob Karaoke volume 2 Karaoke echo There two means to adjust Karaoke echo remote control and menu Remote Control Means Press KARAOKE ECHO button on the remote control Menu Means Press MENU button on the front panel until MIC ECHO appears and then rotate the MULTI FUNCTION knob 3 Karaoke tone After 3 seconds searching radio station you Press TREBLE and BASS button of Karaoke may rotate the MULTI FUNCTION knob to on the remote control to adjust Karaoke treble Adjust volume and bass XO Karaoke tone 2 3 11 Tuning 2 Auto search and save radio station Before tuning operation pl
50. acting protection circuit the working of circuit is unstable when power on and the produced impulse current does great harm to speaker and power amplifying circuit so delay attracting protection circuit is set Power on delay attracting protection circuit is divided into 2 steps the first step C L R channel and its working process is as follows for AC outputted from transformer after rectification and filtering of Vd113 C110 22V voltage is achieved charges C115 through R108 to make Vd111 struck through reversely and to make V105 V104 forwards on relay 100 is made attracting finally to reach delay attracting effect The second step SR SL channel performs power on anti impulse protection through the following means when power on reset of machine system has not finished P CMS may probably be high level to make triode V137 on to cause power on impulse sound now a VS level is added on B electrode of triode V137 through resistor R163 to make it in cutoff state at the moment of power on a VS level is added on pin 3 of TDA2052 through resistor R189 to make TDA2052 in mute state to avoid the impulse to loudspeaker after machine system resets MCU outputs a P CMS low level signal to still make V137 cut off pin 3 of TDA2052 is still VS TDA2052 outputs mute After delay start up of machine is successful output signal P CMS of MCU switches into high level immediately now relay has attracted RLYO is grounded through relay to make V137 on vo
51. ampling rate less than 96KHz There are two means of manually selecting decode mode Remote control and menu Remote Control Means Press STEREO Il DSP DTS DIGITAL buttons on the remote control if the decode mode that you selected cannot be realized to input signal the system still remains the Original decode mode Menu Means Press MENU button on the front panel continuously until DECODE appears Rotate the MULTI FUNCTION knob and VFD screen will display STEREO DSP DOLBY PRO II Dolby Digital DTS whichstands for STEREO DSP Dolby Pro Logic ll Dolby Digital and DTS m decode mode respectively You need to press Eres the MULTI FUNCTION knob to confirm to Emm Rm e enter new decode mode 5 4 G Note As for a certain input channel if some 21005 modes not exist the operation Select Source is invalid 2 3 4 Select Decode Mode This unit has Dolby Digital Dolby Pro Il DTS DSP and STEREO decode modes but not every input channel has all the decode modes When the user switches the input channel or changes the input signal format the unit may automatically select the default decode mode according to the input signal format Certainly the user may also select the decode mode manually and please refer to the following table for the selected decode mode of each channel and the default decode mode Table 1 Relation betwee
52. by Digital decode modes and 15 30ms in Dolby Pro Logic decode mode NOTE 10 AM round antenna should be placed far away from the equipment You may put up on the wall or on thebookshelf 21 AM round antenna and outdoor antenna can be used at the same time Connect to FM Antenna Connect to the indoor FM antenna Connect the accessional indoor FM antenna to 750 UNBAL FM ANT terminal OU Channel delay 2 3 14 Noise Testing During system working it is used for users to adjust level balance between channels in multi channel state In non STEREO decode mode press TEST button on the remote control to enter noise testing mode The unit will output noise according to the sequence of left centre right surround rignt and surround left The lasting period of each channel is 2s during which time users may press the MAIN VOLUME button on the remote control to synchronously adjust 6 channel level and may also press MULTI FUNCTION button to adjust each cnahhel s level To exit noise testing mode please press TEST button again Select speaker mode 2 3 16 Headphone This unit is with individual headphone amplifier If necessary please insert the headphone plug into the headphone jack on the front panel In this state changing decode mode is invalid J
53. clock from the incoming AES3 stream Stand alone operation allows system with no microcontroller to operate the CS8415A with dedicated output pins for channel status data Target applications include AVR CD R DAT DVD Multimedia Speakers MD and VTR equipment mixing consoles digital audio transmission equipment high quality D A and A D converters effects processors set top box and computer audio systems FEATURES 3V to 5V Digital supply Complete EIAJ CP 1201 IEC 60958 AES3 S PDIF compatible receiver 7 1 S PDIF input MUX Flexible 3 wire serial digital output port 8 kHz to 96 kHz sample frequency rang Low jitter clock recovery 2 Pin and conrocontroller read access to channel statue and user data Microcontroller and stand alone mode Differential cable receiver channel statue and User data buffer memory Auto detection of compressed audio input streams Decodes Q CD sub code System clock mode 3 PIN DESCRIPTION SDA CDOUT Serial control data Adress bt RXPO AES3 SPDIF receiver port LIN mmm 000000 eg jem jem mm o o we T I NN ow omm eee o omm e 7 BONN NN n o sem o samana 1
54. duction to 74 04 1 DESCRIPTION The is identical in pinout to 1504 and the MC14069 The device inputs are compatible with Standard CMOS outputs with pullup resistors they are compatible with LSTTL outputs The device consists of six three stage inverters 2 FEATURES Output Drive Capability 10 LSTTL Loads Outputs Directly Interface to CMOS NMOS TTL Operating Voltage Range 2 to 6V Low Input Current 1 59 High Noise Immunity Characteristic of CMOS Devices In Compliance With the JEDEC Standard No 7 Requirements Chip Complexity 36 FETs or 9 Equivalent Gates 3 PIN DESCRIPTION 1 NN NN w 09 sm 0 Oe e a w sm NN w o NN w m NN e NN w o ow ow o 3 5 9 function introduction to LM1875 1 Description The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications The LM1875 delivers 20 watts into 4 8r 8 bad on 25V supplies Using 8 bad and 30 supplies over 30 watts of power may be delivered The amplifier is designed to operate with a minimum of external components Device overload protection consists of both internal current limit and thermal shutdown The LM1875 design takes advantage of advanced circui
55. e 10 2 3 6 Adjust Channel Level eee eene 10 23 7 Adjust Main Channel Tone nc dic pA LRL p 10 2 3 8 Select EQ Mode 10 TI uu TT n n ans 2 T 14 EE AE 14 s T n ss R s gt n U UY i BE SBEC CATIONS S UD E EE 16 7 T 17 n ss 5 B 20 2 2 T B J panin s b 27 2 T m ao M m siaran sa n YY T e E 3 5 2 function introduction to Pt2399 _ _______ ____ ____ _ _ __ ______ 52 3 5 3 function introduction to Cd4051 Ska gas RE ERE 53 35 avis uia RU RS 54 3 5 5 function introduction to Cd4053 55 Ga ue lin o PIOSTI 56
56. e e 3 we we we m ow we 01 1 00 0 ose we we w we e 7 we e ow sme m wur m 1 9 ma 75 om EE 1 5 m 1 mm m w o Om m 1 m se lt gt gt 76 Chapter Four Disassembly and Assembly Process Audio power amplifiers manufactured in are largely identical but with minor differences and are mainly composed of decode board components power board components control panel components CPU control board components power amplifier board components MIC board components and signal board components In order to speed up the compilation of Service Manual we shall not give repeat explanation to model with minor differences in chapter four Disassembly and Assembly Process for the later compiled service manuals For disassembly and assembly process in this chapter please refer to chapter 4 of AV225T Service Manual The pictures of this model are shown as follows 777 Chapter Cinque PCB board amp Circuit diagram Section One PCB board 5 1 1 MIC Board R106 1 CN T CN 78 5 1 2 SIGNAL Board h Tx am S VD110 1 lt 4 47 QO y t 4582232 2005 10 22 REMOTE 79 5 1 3 Surface layer of DECODE Board
57. ease select Press MEMORY button on the remote control appropriate wave band according to the until VFD screen displays MEMORY Following steps Press MULTI FUNCTION button for long Press TUNER button of sound source above 1 seconds the unit will automatically selection on the remote control search radio station forward or backward and Press BAND button on the remote control to then automatically save it This unit may select wave band or directly enter the tuning automatically save 36 FM and 12 AM radio FM AM wave band through menu 1 Auto stations search Remote Control Means Press the MULTI FUNCTION button for long above 1 second and the unit will automatically search radio stations forward or afterward Until radio station with strong signal is searched it will automatically stop Press the MULTI FUNCTION button to fine adjust if necessary Menu Means Press MENU button on the front panel until VFD screen displays TUN SEEK Rotate the MULTI FUNCTION knob and the 3 Save radio station manually unit will automaticallystop after searching the Press MEMORY button on the remote control radio station with enough strong signal Within and then NUMBER buttons to save radio about 3 seconds you may continue rotating station If the saved radio station number is the knob and searching radio station over 9 please press 2 numbers continuously Af
58. er supply of the machine and then use hands to touch the casing of part of elements and check whether they are hot to judge the trouble spot You should pay more attention when using this method to check in high voltage parts 1 2 2 Electric resistance method Set the multimeter in resistance position and test whether the numerical value of resistance of each point in the circuit has difference from the normal value to judge the trouble spot But in the circuit the tested numerical value of resistance is not accurate and the tested numerical value of integrated IC s pins can only be used for reference so the elements should be broken down for test 1 2 3 Voltage method Voltage method is relatively convenient quick and accurate Set the multimeter in voltage position and test power supply voltage of the player and voltage of a certain point to judge the trouble spot according to the tested voltage variation 1 2 4 Current method Set the multimeter in current position and test current of the player of a certain point to judge the trouble spot But when testing in current method the multimeter should be series connected in the circuit which makes this method too trivial and troublesome so it is less frequently used in reality 1 2 5 Cutting method Cutting method should be combined with electric resistance method and voltage method to use This method is mainly used in phenomena of short circuit and current leakage of the circuit When cu
59. f diode VD112 and it is 0 We judge that relay has trouble After changing relay trouble is removed R102 1K OVER 4 VD108 Ri01 _ RLY0 SWM manas poy 47K CON4 N G 111 L 4 7 1W R112 4 7 AW R113 4 7 1W 114 4 7 1W OO l O O1 OO O 1 R115 e o 4 71W Note 1 After relay is used for a period working state may be unstable and some abnormalities may appear relay does not attract after power on sometimes each contact point does not touch fully after relay attracting sometimes CPU cannot detect RLYO signal after relay attracting this signal is low level auto protection VD113 1N4004 10K V K C9014 C126 lis C1160 1u C1170 1u C1180 1u C1190 1u 1200 1 104 i R100 47 3W C110 220u 35V XL101A XL100A L100 0 7UH L101 0 7UH 51K 4 ZI A A 2 2 RELAY 4 VD112 C8050 1N4148 XL101A XL101A WP6 WP6 Figure 3 3 1 1 Protection circuit diagram 2 Causes of power on protection over current protection over voltage protection and CPU cannot detect RLYO signal test whether each output channel has DC output when power on protection trouble appears make clear which reason caused it Centre or surround power IC have trouble which cause that output signal has D
60. form diagram DSP decode state Tek Stop Pos 0 0005 SAVE REC About 1 Saving Images select Folder Save TEKOO46 BMF 1 00 5 D us 2 35v 13 Apr 06 21 31 48 27 C178 waveform diagramin DSP decode state Tek AL Stop Pos 0 0005 SAVE REC Action Save Image File Format 1 Saving Images select Folder TEKDOAT BIMP 1 00 S00 us 235 13 21 31 28 C184 waveform diagram in DSP decode state Tek AL Stop Pas 0 0005 SAVE REC Action Save Image File Format About 1 saving Images select Folder Save 500 us 215mv Current Folder is 29 C187 waveform diagram in DSP decode state Tek Al e Stop Pos 0 0005 SAVE REC ACTON About naf M adn urn ur Pu Saving Images select Folder SAYE TEK0045 6M1F CHI 1 00 S00 us 2 43 13 21 36 49 30 190 waveform diagramin DSP decode state Tek kl Stop Pos 0 0005 SAVE REC About a Saving Images select Folder Save 1 00 900105 z43V 13 Apr 06 21 35 lt 10H 3 4 2 Key point voltage 1 Power board Vc voltage of flat cable holder XS8 is 53V and Vc voltage is 53V negative voltage of diode VD113 is 14 6V 2 P
61. ge that power amplifier circuit working is normal and trouble is preliminarily decided on decode board Shown as in the figure 3 3 1 3 input digital signal test OSCLK OLRCK SDOUT of N106 Cs8415 and there is pulse waveform output test AD2 AD1 AD0 WCK BCK MCLK of N105 CS4923 and they all have signal output test AOUTA1 AOUTB1 AOUTA2 AOUTB2 AOUT3 AOUTB3 of N107 CS4360 and they all have no waveform output test voltage of power supply pin of N107 and it is normal test SDIN1 SDIN2 SDIN3 MCLK of N107 CS5340 and they all have signal so we judge that N107 CS4360 has input but has no output After changing N107 output is normal and trouble is removed C157 L107 1U 16V vp2 5s gt 4 N107 FB C159 2 CS4360 104 R105 R10 5 7 K A R110 VLS MUTEC1 2 amp i oo e m SDIN2 AOUTB1 4 sping 25 lt SOLK 53 DA Sb LRCK ci Ci R120 R121 10K 10K Q LN V ARST O 8 sek 11 M DD 1 iE DA 12 piro M1 AGN cite 2 146 1111 10 16 s s 104 FIL C11 4 VA5 0 2 2U 16VC118 2 104 FB 33K B C124 119 5 C125 L106 7 1U 16V FB VD3 3 C12q 104 VD3 3L113 15 FB mi 1l C127 104 MO M1 C149 L11 R156 0 8 1Uh6V S 1U 16V 2 MCLK FILT e VL REF GND dat as IN Z p
62. h Cd4052 N101 and its truth value table is shown as the following ow AV321T RU has 3 kinds of input states tuning VCD DVD and they are controlled through 4052 A 4052 B signal respectively refer to truth value for details Signals after being gated output from pin 3 and pin 13 of N101 and then output left right main channel signal from its pint 12 through N111 CD 4052 to decode board for signal processing Analog signal input in 5 1 state the gating of 5 1 analog signal input of AV321T RU Jis controlled by two IC CD 4053 N102 N103 control pin 9 10 11 of CD 4053 are all controlled by the 5 1CH signal outputted from pin 4 of M62446 N104 when 5 1CH signal is high level the gating is analog signal input of 5 1 state in this state there is no digital sound field all signals are straight through when 5 1CHis low level the gating is the synthesized signal after decoding Straight through and digital sound field switch control AV321T RU has two different modes of straight through and digital sound field and its gating input is controlled by N111 CD4052 and N102 CD When control signal 4053 INT is high level for it is connected to the enabled end of N102 this IC is in non working state main channel signals output through pin 5 11 of N111 and directly send to M62446 for processing to output Hi Fi musical signals When 4053 INT is low level main channel signals are sent to decode board for digital sound
63. h load for power is large and temperature rise is high this player adopts fan to perform heat radiation When volume is more than 45dB FAN signal sent out from control pane N101 changes into high level V103 9014 and V105 58050 are on to form power supply loop of fan When the connected load is headphone control line PH SW is high level V104 9014 is on to pull down FAN signal so no matter how is the volume of system fan will not start up 3 2 2 Decode board Main element function of decode board is shown as follows IC SM8958AC25P N116 control core of MCU system 493264 N105 high performance digital audio decoder including DOLBY decode DTS decode and DSP processing CS8415 106 serial digital audio signal receiver CS5340 N108 2 channel A D converter CS 4360 N107 6 chanel D A converter IC 24C02 N115 state memorizer IC 74HC04 N101 6 channel phase inverter IC BM1117 3 3 N109 3 3V voltage regulating IC which provides power for 58415 Cs4923 Working principle for optical and coaxial signals after being filtered by inductor capacitor reshaped by phase inverter 74HC04 N101 they are sent to serial audio digital signal to receive signal input pin 4 12 14 of IC Cs8415 106 then converse serial digital audio signal to PCM signal through this IC and output from pin 16 sampling speed signal 17 main channel clock signal 18 audio data signal of this IC to
64. h performance operational amplifiers combining excellent DC and AC characteristics It 66 is low noise high output drive capability high unity gain and maximum out swing bandwidths low distortion high slew rate input protect diodes and output short circuit protection The operational amplifier is compensated internally for unity gain operation The device has specified maximum limits for equivalent input noise voltage FEATURES Unity gain bandwidth 100MHz Common mode rejection ratio 100dB Typ Peak to peak output voltage swing 32 V Typ with Vcc 18V and RI 600Q 2 High dc voltage gain 100V mV Typ High slew rate 9V us Typ Wide supply voltage range 3V to 20V 3 PIN DESCRIPTION 9 RR owe emma m mes NENNEN NNNM MEN EM NONE e foros 3 5 17 function introduction to PT2315 1 Description 2315 is a two channel digital audio processor utilizing CMOS Technology Volume Bass Treble and balance controls are incorporated into a single chip Loudness Function is also provided to build a highly effective electronic audio processor having the highest performance and reliability with the least external components All functions are programmable using the Bus The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantage for audio application Housed in a 20 pin DIP
65. has been burnt down Change transformer and trouble is removed Note when power not on firstly make clear that it is power not on or has no screen display whether it is part of voltage is abnormal or all voltage is abnormal if it is power not on test stage by stage from power socket until the trouble is found 34 3 3 2 Troubleshooting flow chart 1 Troubleshooting process for Power on protection is shown as in the following figure 3 3 2 1 Power on protection Check whether there is central point voltage Check which channel outputs DC and then check this channel whether signal f e added orman volume Check whether the diode or is increased and protection triode of over current protection is available is damaged or capacitor C115 has trouble whether power amplifier board resistor Change resistor R111 R141 has Check whether resistor Ch R108 has open ange resistor circuit Check whether RLY Check whether power board detect signal is VD108 is low level and change V100 abnormal Whether player protection Change relay Figure 3 3 2 1 Troubleshooting flow chart for Power on protection 35 2 Troubleshooting flow chart for Karaoke has no sound is shown as in the following figure 3 3 2 2 Analysis this kind of trouble may adopt signal input method Test stage bu stage when a certain stage does not have disturbance sound i
66. ir of channels which are connected in a single pole double throw configuration The three binary control input signals select 1 of 2 pairs of channels to be turned on and connect it to the three outputs 2 Features The operating voltage is as to 18V and quiescent current is as low as 5 HA max at Vpp 5V 3 PIN CONFIGURATION a a a ___ __ 55 3 5 6 function introduction PT6311 1 DESCRIPTION PT6311 is a Vacuum Fluorescent Display VFD Controller driven on a 1 8 to 1 16 duty factor housed 52 pin plastic QFP Package Twelve segment output lines 8 grid output lines 8 segment grid output drive lines one display memory control circuit key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip micro computer Serial data is fed to PT6311 via a three line serial interface 2 FEATURES CMOS Technology 56 Low Power Consumption Key Scanning 12 x 4 matrix Multiple Display Modes 12 segments 16 digits to 20 segments 8 digits 8 Step Dimming Circuitry LED Ports Provided 5 channels 20 max 4 Bits General Purpose Input Ports Provided Serial Interface for Clock Data Input Data Output Strobe Pins No External Resistors Needed for Driver Outputs Available in 52 pin QFP Package 3 DESCRIPTION pw gt o Data Output Pi ESL __ Serial Interface Strobe Pin __ __ L
67. irror image constant current source V104 Composite power Mute V107 VD102 VD103 amplifying V133 V113 Figure 3 2 5 1 Power amplifier and protection circuit diagram L channel signal through R101 R103 C101 coupling is sent to B electrode of differential amplifying stage V102 V102 and V103 compose the differential amplifying circuit of single end input and single end output Audio signal is outputted from C electrode of V102 to B electrode of voltage amplifying stage then to composite power amplifying stage after voltage amplifying V104 V107 VD102 and Vd103 compose mirror constant current circuit VD102 VD103 provide V104 V107 with constant base electrode current Emitter electrode resistance of V104 decides working current of differential amplifying stage emitter electrode resistance of V107 decides working current of voltage amplifying stage V132 and V112 compose multiple unit tube amplifying to make final stage of power amplifier have powerful current amplifying ability and they compose positive half cycle amplifying waveform V133 and V113 compose negative half cycle amplifying waveform The function of Temperature compensation tube in circuit has two firstly it is the base electrode bias of upper lower geminate transistor and its working state decides static working current of composite power amplifying stage that is through adjusting the on state of V106 static working point of composite power amplifying stage may be set The
68. it is normal test the positive audio signal of capacitor C106 C107 and it is normal so we judge that headphone has trouble After changing headphone trouble is removed 32 Note when headphone has no output firstly make clear whether relay is disconnected then test whether SHUTDOWN pin voltage of LM4880 is normal 2 5V when in normal condition and finally judge whether headphone has trouble or LM4880 has trouble Example 6 Symptom no sound output Description after power on connect to 5 1CH main channel has no output centre and surround have output power board FL101 FL102 fuse is burnt down Analysis and troubleshooting change FL101 FL102 fuse power on again fuse is burnt down power off shown as in the figure 3 3 1 5 test resistence to ground of power board Vc and resistance is zero ohm unplug power board flat cable holder XS8 test resistance to ground of power amplifier board Vc Vc and it also zero so we preliminarily judge that trouble lies on power amplifier board Test resistence between each pin of power pipe V112 of power amplifier board and they are all 0 resistance between each pin of power pipe V113 is 0 V112 V113 have been stricken through change V112 V113 change fuse after power on again output is normal and trouble is removed C103 47u 100V V112 VD104 2SC5200 1N4148 74 V114 2N5551 47K 220p R10 104 V104 _ 2N5551 L 474 100 Vc
69. jo y5olg signal flow chart of he player is shown as in the following figure 3 1 4 1 3 1 4 Signal flow chart of the player P_LRM P_SCM DIGITALAUDIO INPUT 4052 A 4052 B Mix amp buffer BOARD gt o Digital L__2 COAXIAL OPTICAL T LR audio 4558 DENIM d 5 1CH L R 4053 INT v TUNER 2 Pre position x x Dual decode lC ____ N Mix amp buffer D R power in o ore tO L R 4052 2 ES L R SL SR C SW M62446 5532 7 DVD E lt SR z m Vs NGD Vs 0 LEVEL Mix amp buffer C R Central P DISP CLK DAT LAT SW Load surround A EE DISPLAY BOARD o 9 SW OUT detect power DO CLK DAT CE l x KM VC x x gt DCL DDAIDST VFD 4 PT6311 SWM CD4082 x FAN FAN DVD
70. k protection product e m mmn 2 1 2 3 4 e 5 6 7 8 CL e tJ LeJ LRU SL sw SR o m Dn ot te v Zy y H MEMORY button Save tuning stations NOISE TESTING button MUTE button 2 2 4 ILLUSTRATIONS TO THE REMOTE CONTROL Q STANDBY button Enter or exit standby state SOUND VIDEO SOURCE button Select input signal sources manually Q NUMBER buttons For saving and calling saved radio stations AM STEP button Pressing this button for long above 3 seconds may switch step valus 9KHz or 10KHz in the AM wave band Q FORWARD AFTERWARD button Call the saved radio stations forward backward DEFAULT button Press this button for long above 3 seconds the unit automatically restores system parameter to default value MULTI FUNCTION buttons Q CHANNEL buttons Using with multi function buttons may separately adjust channel leve STEREO MODE button DOLBY PRO LOGIC II DECODE MODE button DTS DECODE MODE button DOLBY DIGITAL DECODE MODE button SPEAKER MODE SETUP button Pressing this button may circularly select main speaker mode and subwoofer on off mode EQ MODE button Press this button to circula
71. l also selects VCD channel thus the synchronous switch of audio and video of VCD channel is realized Similarly for synchronous switch of audio and video of DVD channel pin 1 and 2 of N104 M62446 of signal processing board send out 1 and 0 control signal of A and B to finish the corresponding switch When 5 1CH is selected it is equal to selecting DVD channel Composite video signal is outputted through triode V100 1015 V101 1015 and V102 1015 output S video signal 3 2 7 MIC headphone board Working principle of microphone part has been shown in section 2 of chapter 2 so we will not repeat here Headphone part L and R channel signal is outputted from pin 31 and 32 of signal processing board 20975 N104 M62446 through coupling capacitor C103 C104 then sent to pin 2 and 6 of two operational Amplifiers of N100 LM4880 after amplifying headphone signal is outputted from pin 1 an d7 of N100 respectively When headphone is inserted MCU detects that PH_SW signal is high level the corresponding control signal is high level main channel is muted P RC controlled by CPU changes into high level relay on power board disconnects RLYO of power board is pulled up to 5V control signal changes into high level triode V101 58050 is on pin 5 of headphone amplifier N100 has 2 5 voltage input headphone amplifier is in working state to make V104 of signal processing board on at the same time V103 and V10
72. ltage of pin 3 of TDA2052 is about 5V higher than negative power voltage SL SR channel restores normal output TDA2052 chip under the condition that load is not connected will appear component DC so false load 8121 R122 is added in power board surround channel 2 Over voltage protection on output end of each channel an over voltage sampling resistor is connected L channel is R116 R channel is R117 C is R118 SR and SL are R120 and R119 respectively only one 5 central point voltage is more than 3 5V or less than 3 5V V101 V102 is on to make their C electrode voltage decrease B electrode V103 is pulled down to make V103 on relay disconnects finally and over voltage protection finishes The working process is shown in the figure 3 2 5 2 resistoris channel R116 voltage gt 103 disconnects connected to T decreases 2 each channel 1655 starts up than 3 5V V102ison Whenmore 3 V101ison Over voltage than 3 5V Rel sampling C electrode elay Figure 3 2 5 2 Over voltage protection flow chart 3 Short circuit protection an over current sampling triode is connected to output load resistor of R channel sampling triode of L channel is V114 on power amplifier board load resistor is R126 R127 on power amplifier board C SR SL channel power amplifying IC has been with over current protection inside Only over current appears L channel the pressure drop
73. mode symbol TUNER symbol its flicker shows the tuner is in signal searching state Call the preset saved radio station or has saved the currently tuning channel The tuner has received signal Stereo decode mode or the currently received FM radio station is stereo output signal DSP decode mode symbol In DSP decode mode stimulate STADIUM sound field In DSP decode mode stimulate STAGE sound field In DSP decode mode stimulate HALL sound field In DSP decode mode stimulate DISCO sound field DSP decode mode stimulate LIVE sound field Q Connect channel data format display area Q Effective channel display area 2 2 3 REAR PANEL ILLUSTRATIONS o 000000 SUPPLY 220 V 50 A EM JOD a DIGITAL Coaxial digital sound source input jack 1 2 optical digital sound source input jack LINE OUT AM FM antenna terminal Subwoofer signal line output jack Connect AM FM antenna outside Data S VIDEO Model data plate DVD S Video Selected Jacks Speaker jack STEREO Connect with speaker terminals DVD stereo audio signal input jack CAUTION mark 5 1CH Remind the user of dangerous voltage 5 1CH audio signal input jack Inside VIDEO Dual square symbol DVD Video Selected Jacks Class Il electric shoc
74. n input channel and Select Decode Mode decode mode 2 3 5 Adjust Volume Rotating the MULTI FUNCTION knob on the front panel or pressing the MAIN VOLUME button on the remote control may synchronously adjust 6 channel level and the screen displays VOL XX adjustment range 0 60 Note The main volume automatically sets 20 each time when power on Adjust Volume 2 3 6 Adjust Channel Level Press CHANNEL button on the remote control andthe VFD screen displays the corresponding channel symbol FL XXX FR XXX FC XXX SL XXX SR XXX SW which means left channel right channel centre channel surround left channel right surround channel and subwoofer channel respectively Press the MULTI FUNCTION adjustment button on theremote control to adjust channel level The adjustment range of channel level is 60 60 Figure The design of channel level on thescreen Adjust Channel Level 2 3 7 Adjust Main Channel Tone Press TREBLE and BASS button of main channel on the remote control to adjust the main channel treble and bass respectively Adjust Main Channel Tone 2 3 8 Select EQ Mode Pressing EQ button on the remote control may select FLAT DISCO POP ROCK and JAZZ mode respectively Figure EQ mode display Select EQ Mode 2 3 9 DEFAULT Press DEFAULT button for long
75. n loudspeaker this stage has trouble when using this method check from back stage to front stage Another method is signal control method check stage by stage from front to back stage if a stage has no sound it means that this stage has trouble Karaoke has no sound Check signal board N Check N210 and MIC hole circuit Check whether C202 has sound signal Check whether R219 R221 has sound Check PT2315 and CPU signal P SCCL P DATA Check whether C245 C246 have sound Check N203 and power supply loop Check whether V104 V105 base electrode is 0 7AV Check whether V104 or 105 is stricken through Check whether V103 E electrode is high Change V103 level MICDET is start evel and whether K is low level CPU MIC hole and V200 have trouble Figure 3 3 2 2 Troubleshooting flow chart for Karaoke has no sound 36 3 Troubleshooting process doe No output 2 channels is shown as in the figure 3 3 2 3 No output 2 channels Check whether power supply of each channel is normal N Refer to troubleshooting for power not on Check whether mute circuit signal is normal N Check whether MIC holder is normal and check mute circuit Check Check whether power N whether signal N amplifier board XS8 has board capacitor C119 signal board N104 Check power supply signal
76. ne 0388 Filtering w eve Rectification SL SR channel power amplifying level Filtering Figure 3 2 4 1 Power block diagram sogo The two groups AC 35V voltage outputted from the first sublevel winding of transformer after rectification and filtering of 8 5404 VD100 VD107 diode and 2 electrolytic capacitor 15000uF 63V C108 C109 positive negative 53V power is achieved to supply power for left right channel The two groups AC 17V voltage outputted from the second sublevel winding of transformer after rectification and filtering of 4 IN5404 VD111 VD114 diode and 2 electrolytic capacitor 4700uF 35V C141 C142 positive negative 23V power is achieved to supply power for SL SR C channel For other IC and operational amplifiers after voltage regulating of 3 end voltage regulator L7812 N101 L7912 N102 positive negative 12V power is achieved to supply power for other IC 3 2 5 Power amplifier board and protection circuit 1 L R channel power amplifying circuit L R channel power amplifying circuit L R main power amplifying circuit of AV321T RU is composed of discrete component the composed block diagram is shown as the following figure 3 2 5 1 take L channel for instance AC negative feedback 8121 108 C105 Composite power amplifying V132 V112 LIN Difference amplifying Voltage Temperature level V102 V103 compensation level V106 Speaker V101 l Relay Mis M
77. nerally speaking these antennae can supply enough signal strength Connect to AM Round Antenna 1 Push the jack button to open it 2 Connect the AM round antenna cord to AM ANT and GND terminals 3 Let go off the button to clamp the speaker cord Pull the cord lightly to check the connection Is right or not Push the jack button to open it Insert the speaker cord Let go off the button to clamp the speaker cord Ce 4 Connect the AM round antenna to the stand NOTE Do not use the outdoor and indoor FM Antennae at the same time GND Grounding terminal In order to ensure the safety and decrease the interference please well connect the GND terminal The better grounding method is insert the metal pole into wet ground 50 Adjust the direction of AM round antenna to get the best receiving effect 2 3 13 Channel Delay Channel delay operation is only available in Dolby Digital DTS and Dolby Pro Logic modes Press DELAY button on the remote control When VFD screen displays C XXMS use MULTI FUNCTION button to adjust the centre channel delay The adjustment range is 0 5ms Press DELAY button on the remote control again When VFD screen displays S 5 use MULTI FUNCTION button to adjust the surround channel delay The adjustment range is 0 15ms in DTS and Dol
78. on the figure 3 3 1 4 test base electrode of signal board triode V101 and it is low level Mic mute signal is normal test signal board capacitor C244 and there is no signal test signal board capacitor C224 and there is no signal Considering that MIC input can be detected test signal board capacitor C202 and there is signal power supply voltage of N203 is normal so we preliminarily judge that trouble lies in 203 PT2315 After changing PT2315 trouble is removed C21047u 16V N203PT2315 1 REF CLK VDD DATA 9 D AGND 18 TREBL LOUT C21 TREBR ROUT 214 RIN BOUT_R BIN R NC BOUT L 8 LOUD L 2 R21820K LII R21947K 1 4 7u 16V C244 C203 K MIC R2024 7K 2 4 7u 16V 4 7u 16V 4558 VD202 ME 1N4148 5 6r e N gt gt O ODO T C239 u C241 1 0 22 VD203 Figure 3 3 1 4 circuit diagram Example 5 Symptom headphone has no output Description after power on power amplifier has output headphone has no output Analysis and troubleshooting power on input DVD signal insert headphone and find that relay disconnects P RLY of headphone board flat cable is high level SHUTDOWN pin voltage of N100 Lm4880 is 2 5V IN A IN B of N100 has audio signal test power supply pin voltage of N100 and
79. ower amplifier board negative voltage of diode VD111 is 22 3 positive voltage of diode is 22 3V 3 of N105 mute signal voltage 19 0V when mute is off 22 4V when mute is on main channel mute signal P LRM and central surround mute signal P CSM are separate central surround channel in stereo state is always muted Control panel of flat cable holder 510 is 26 5 AC F1 F2 is 2 1V AC each 4 Video board 1 of XS100 is 12V pin 3 is 12V 5 MIC board before inserting headphone is low level PH SW is low level after inserting headphone P is high level SW is high level 6 Decode board voltage of pin 3 of N109 is 5V voltage of pin 2 is 2 3 3V negative voltage of diode VD103 is 2 5V 50 Section Five Function Introduction to IC 3 5 1 function introduction to 4558 1 Description The RC4558 and RM4558 devices are dual general purpose operational amplifiers with each half electrically similar to the A741 except that offset null capability is not provided The high common mode input voltage range and the absence of latch up make these amplifiers ideal for voltage follower applications The devices are short circuit protected and the internal frequency compensation ensures stability without external components The RC4558 is characterized for operation from 0 C to 70 C and the RM4558 is characterized for operation over the full military temperature range of 55
80. r amplifying of 5 2CH signal or analog signal 6 Headphone board Karaoke input and headphone output signal amplifying 7 Vide board input output switch of two channel composite video and S video video signal 3 1 2 Function and features Simple operation panel interface the panel of the player has only one power switch button menu button and a large knob simple and clear Wirh DTS AC 3 decode function Optical coaxial signal decode function Built in 5 channel power amplifying adaptable to AC 3 DTS and stereo music replay Main channel 110W Centre surround 22W with powerful power With 6 channel volume control and separate level control and also with 7 band electronic equalization With multiple electronic EQ modes adaptable to different musical styles Digital sound field delay function With tuning function With intelligent protection of over current and over voltage Karaoke function and headphone output 220V Video board RDS outlet Xs101 Power board 09 y jo yoolg x es Signal board Transformer entry level Xs3 Secondary coil SWITCH RLYC NC DDA O DCK DST FAN View board Mic or earphone board Secondary coil 8 5 Transformer Le au se si Je e d y jo 209 Jo e d eu
81. rd C207 has signal sine wave to CD channel under DSP decode state test whether waveform of pin 39 40 41 42 43 of N105 is correct Test whether N105 power supply is normal Test whether decode board L101 voltage is normal Y Change N106 Figure 3 3 2 5 Troubleshooting flow chart for DSP has no output 39 Section Four Servicing Parameter 3 4 1 Signal waveform diagram This section collects signal waveform diagram of audio video and each unit circuit and the purpose is to help servicing people accurately and quickly judge where trouble lies to better servicing skills for servicing personnel Because of the difference in brand model and tuning of oscillograph some difference may exist so servicing people should pay more attention in daily work 1 Waveform diagram of pin 13 of N101 Tek li Tria d Fos 0 0005 SAVE REL Action ui Folder Save CH1 S rnV SUD us 7 13 2mm Current Folder is 4 5 2 Waveform diagram of pion 3 of N101 Tek Stop Pos 0 0005 SAVE REC AM V JUS Folder save 500m 5005 CHI 13 2mV 11 06 15 33 1 011338 40 3 Waveform diagram of pin 2 of XS9 Tek Stop Pas 0 0005 SAVE REC Action save mage File Format About Saving Images select Folder Save TEROOU2 BMP
82. rly select EQ mode KARAOKE ECHO button Adjust Karaoke echo KARAOKE TREBLE button Adjust Karaoke treble KARAOKE BASS button Adjust Karaoke bass KARAOKE VOLUME button Adjust Karaoke volume MAIN CHANNEL TREBLE button Adjust main channel treble MAIN CHANNEL BASS button Adjust main channel bass DSP DECODE MODE button MAIN VOLUME button Capable of synchronously adjusting 6 channel volume DELAY button Using with multi function adjustment buttons may adjust centre surround channel delay FM STEREO MODE button Manually automatically select FM stereo mode WAVE BAND button Used to switch FM AM wave band 2 3 BASIC OPERATIONS 2 3 1 Turn the Unit 1 Power On Before power on please check whether the power accords with the marked specs ofthe unit whether the power socket accords with the power plug of the unit and whether the sound source connection cords output cords are correctly connected Then you may connect the power Press POWER switch on the front panel of the unit and the indicator light on the panel flickers The unit automatically connect with the input sound source before power off last time and automatically select decode mode according to the input sound source format 2 Standby If the user wants to finishing operating in short time you may press STANDBY button on the remote control to enter standby state you wan
83. rol order is sent to PT6311 N101 through keyboard scanning circuit PT6311 N101 outputs control data to MCU through coding drive inside and realizes the control of controlled circuit through MCU and controls VFD through PT6311 N101 290 Button control N101 PT6311 Panel indicator light control area Figure 3 2 3 1 Control panel circuit block diagram DDA VFD DCK MCU Display DST VFD101 is vacuum flourescent display screen and the most distinct feature is high brightness The working principle is similar with that of kinescope of TV set Pin 1 2 46 47 are filament power supply MCU controls SEG electrode through the control of PT6311 N101 to make characters of corresponding working state display on screen Remote control receiving circuit is mainly composed of remote control receiver 50038 2 N102 in whicj pin 1 is grounded pin 2 power supply end pin 3 is signal receiving output pin and sent to MCU directly to control corresponding circuit 3 2 4 Power board The function of power board is to provide all kinds of working voltage required by each unit circuit Shown as in the figure 3 2 4 1 AV321T RU adopts large power round transformer Centre and surround channel of AV321T RU adopt CD1875 and 2 TDA2052 respectively TDA2052 is mono channel power amplifying and adopts separate positive negative power supply 26V Panel display Filament voltage 220V 50HZ E Rectification eft right chan
84. rrent Folder is 10 SLwaveform diagram in DSP decode state Tek A Triad Pos 0 0005 Action Save Image File Format About 1 i saving i Images select Folder Save 500 1 00 8 8 0 00 Current Folder is A 11 SR waveform diagram DSP decode state Tek A Trig d Pos 0 000 SAVE REC Action File Format I About 1 saving Images select Folder sawa TEK0011 6M1F 500mm T ms CH1 0 00 Current Folder is 12 FL output waveform diagram after decoding and power amplifier board amplifying Tek 5 Trig d Pos 0 0005 REC File Format I About 1 Saving I l Images select Folder sawa 2 BMP CH1 10 0 500 us 7 208mv Current Folder is 13 FR output waveform diagram after decoding and power amplifier board amplifying Tek Kl Tria d 0 0005 Action About 1 Saving Images Select Folder Save 10 04 SOO us 28mv Current Folder is 4 14 C output waveform diagram after decoding and power amplifier board amplifying Tek vol les Tria d 0 0005 Action Save TERUD1 4 BIMP 10 0 CH1 7 208mv Current Folder is 4
85. t techniques and processing to achieve extremely low distortion levels even at high output power levels Other outstanding features include high gain fast slew rate and a wide power bandwidth large output voltage swing high current capability and a very wide supply range The amplifier is internally compensated and stable for gains of 10 or greater 2 Features Up to 30 watts output power 60 AVO typically 90 dB Low distortion 0 015 1 kHz 20 W Wide power bandwidth 70 kHz Protection for AC and DC short circuits to ground Thermal protection with parole circuit High current capability 4 Wide supply range 16V 60V Internal output protection diodes 94 dB ripple rejection Plastic power package 220 3 PIN DESCRIPTION IN Non Inverting Input Pin VEE Negative Power Supply omm o Signal ou C VCC Positive Power Supply 3 5 10 function introduction to TDA7265 1 DESCRIPTION The TDA7265 is class AB dual Audio power amplifier assembled in the Multiwatt package specially designed for high quality sound application as Hi Fi music centers and stereo TV sets 2 Features WIDE SUPPLY VOLTAGE RANGE UP 25V ABS MAX SPLIT SUPPLY HIGH OUTPUT POWER 25 25W THD 10 RL 8 VS 20V NO POPAT TURN ON OFF MUTE POP FREE STAND BY FEATURE LOW 1 SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION 61 3 PIN DESCRIPTION
86. t to operate it again press STANDBY button again to exit standby state 3 Power Off If not going to use for a long period press POWER switch on the front panel to turn off the power and the indicator light turns out STANDBY loPric amp 1 cOAx 2 TEST DVD TUNER 5 1CH 1 2 3 5 6 7 Turn On Off the Unit 2 3 2 Mute In normal working state press MUTE button on the remote control the unit is silent and the MUTE symbol on the top left corner of the VFD screen is lightened In mute state press MUTE button on the remote control the unit restores to output sound and the MUTE symbol turns out Using the MULTIFUNCTION knob on the front panel or pressing MAIN VOLUME button on the remote control may also cancel mute comes coma DVD TUNER 5 1CH 3 5 6 7 Je 2 3 3 Select Input Sound Source and Video Source This unit has 1 way optical input terminal 2 way coaxial input terminal 1 way VCD input terminal 1 way DVD input terminal and 5 1CH input terminal You may use the remote control to directly select input sound source or use MENU button and MULTI FUNCTION knob on the front panel to select input sound source through menu You are recommended to use remote control means
87. ter completely saving PRESET symbol on the screen is lightened MULTI FUNCTION knob 4 Call the saved radio station Press NUMBER buttons to call the saved radio station directly Press FORWARD BACKWARD buttons to call the saved radio station Call the former or behind one of the saved radio station After completely calling PRESET symbol on the VFD screen is lightened 5 Select AM step value Pressing AM STEP button for long above seconds mayswitch the AM step frequency value that is when tuning the step value each time is 2 or 10KHz Call the saved radio station 2 3 12 Tuning Continued 18 The Explanation of MODE button This unit has two working modes in the Receiving status AUTO MANUAL 10 In AUTO working mode if you select FM Wave band this unit will automatically recognize the radio station program is mono signal or stereo signal and keep the mono or stereo Receiving status 2 If the received radio station program has Louder noise or cacophony in stereo status you may switch to MANUAL working this way the unit is in mono receiving status to decrease noise and cacophony generally You may switch the two working modes through MODE button on the remote control Remote control Antenna Connection You may use our accessional AM and FM indoor antenna when in bad receiving effect Ge
88. tic electricity prevention is of extraordinary importance The following are several measures to prevent static electricity 1 Use a piece of electric conduction metal with the length of about 2 metres to insert into the earth and Fetch the lead wire from the top of the surplus metal and connect to the required static electricity device The length and depth of the metal embedded under the earth should be determined according to the wettability of the local soil For humid places it may be shorter and longer and deeper for dry places If possible it can be distributed and layed in terms of shape 2 On operating table board the antistatic table cushion should be covered and grounded 3 All devices and equipments should be placed on the antistatic table cushion and grounded 4 Maintenance personnel should wear antistatic wrist ring which should be grounded 5 Places around the operating position should also be covered with electric conduction cushion or Painted with antistatic paint 1 1 3 About placement position 1 Audio power amplifier cannot be installed in places with high temperature and humidity 2 Positions for placement should be stable and secure 1 2 Maintenance method 1 2 1 Visualized method Directly view whether abnormalities of collision lack of element joint welding shedding welding rosin joint copper foil turning up lead wire disconnection and elements burning up among pins of elements appear Check pow
89. tputs SDOUT Tek e Stop Pos 0 0005 SAVE REE Acton to Saving Images select Folder SIVE 20 2 00 2 5 us Current Folder is 48 21 Waveform diagram about CS49326 outputs SDIN1 Tek AL Stop Pos 0 0005 SAVE REC Action 4 saving Images select Folder SAVE 21 1 00 2 50 7 1 540 Current Folder is 22 Waveform diagram about CS49326 outputs SDIN2 Tek EUM i Stop Pos 0 0005 SAVE REC About Saving Images Select Folder Save TEROO22 BMP 1 00 2 50 us 7 1 56 Current Folder is 4 4 23 Waveform diagram about CS49326 outputs SDIN3 Tek B Stop Pos 0 0005 Saving Images Select Folder Save TEKOO25 BMP 1 00 SU 0 00 12 Apr 06 03 33 7 0 2 24 Waveform diagram about CS49326 outputs left right clock Tek ERN e Stop Pas 0 0005 SAVE REC 1 Saving Images select Folder Save TEROO2Z6 BMP 1 00 250m CHI 0 00 12 Apr 06 09 41 1 Hz 25 Waveform diagram about CS49326 outputs SCLK Tek e Stop Pas 0 0005 SAVE REC mq About 1 Saving Images select Folder Save TEK DZT BhMP 1 00 0 00 12 06 03 42 1010 2 26 175 wave
90. tting the input terminal voltage of a certain level if voltage of the player rises again it means that the trouble lies in this level 1 2 6 Element substitution method When some elements cannot be judged good or bad substitution method may de adopted directly 1 2 7 Comparison method A same good PC board is usually used to test the correct voltage and waveform Compared these data with those tested through fault PC board the cause of troubles may be found Through the above maintenance method theoretical knowledge and maintenance experience all difficulties and troubles will be readily solved 1 3 Required device for maintenance Audio Generator Digital oscillograph gt 100MHE SMD rework station Multimeter Soldering iron Pointed month pincers Cutting nippers Forceps Electric screw driver Terminals connecting cord Headphone Microphone Chapter Two Functions and Operation Instructions 2 1 FEATURES 2 way coaxial digital signal input 1 way optical digital signal input With 5 1CH input terminal capable of connecting with external multi channel advanced decode output signals such as DOLBY DIGITAL DTS With subwoofer output terminal capable of connecting with active subwoofer speaker Built in FM AM tuner With headphone output jack 6CH digital volume control Separate level adjustment to left right centre surround and subwoofer channel Dolb
91. will detect each different signal and user order at any time to control action of each part of machine If this IC has trouble the player will be not able to work normally In addition this player has no auto search function but is can automatically save and memorize the working state laet time and enter the previous working state when power on next time This player is with tuning function which provides a good function selection for users It directly controls digital tuner receiving AM FM signal through MCU N116 and then outputs through power amplifier Clock and date line of digital tuner is used together with LM62446 N104 another two control lines are directly connected to N116 TUNER L TUNER R signal after being processed by digital tuner is directly sent to CD4052 N101 for gating input 3 2 3 Control panel Control panel is mainly composed by VFD display screen drive IC Pt6311 N101 infrared remote controller HSOO38A2 N102 and indicator light display circuit It completes man machine conversation and working state display mainly The composed block diagram is shown as the following figure 3 2 3 1 Under the control of MCU through DST state DCK clock DDA data control PT6311 N101 display working state of the player and fan state and receive user control order sent out by PT6311 N101 control the controlled circuit of the player to make the player work in indicated working state When user are operating panel buttons cont
92. y Digital DTS Dolby Pro Logic Il DSP STEREO decode Automatically recognize input signal format and select the corresponding decode mode Decode mode manual selection Main channel high low tone adjustment Video and S Video selected function Centre surround delay adjustmen Noise testingt 5 preset EQ modes Digital tuning function Capable of storing 36 FM and 12 AM radio stations Automatically Manually searching radio stations Auto mute if there is no signal High performance digital Karaoke with MIC volume tone and echo adjustment Separate 5CH power amplification Specially automatic protection of short circuit over voltage and over current Full remote control operation Complete unit interface 2 2 Control button Locations and Exp Lanations 2 2 1 Front panel functions and illustrations Q POWER switch Q Headphone jack owitch on off the AC power of the unit MENU button MENU button please refer to the related chapters for details MIC jack Multi Function Knob In normal working mode synchronously adjust 6 channel level In addition by using this knob and MENU button you may lulfil multiple functions Please refer to the related chapters for details IR sensor window Receive the remote control signals 2 2 2 VFD DISPLAY 15 12 MUTE symbol DTS decode mode symbol Dolby Digital decode mode symbol Dolby Pro Logic decode
93. z consumes very little power and operates over a wide power supply range These features are ideal for cost sensitive multi channel audio systems including DVD players A V receivers set top boxes digital TVs and VCRs mini component systems and mixing consoles FEATURES 24 Bit Conversion 102 dB Dynamic Range 90 dB THD N 3 V to 5V Power Supply Digital volume Control with Soft Ramp 1 dB Step Size Low Power Consumption 105 m W with 3 V Supply Low Clock Jitter Sensitivity 2 119 dB Attenuation ATAPI Mixing Popguard Technology for Control of Clicks and pops 3 PIN DESCRIPTION VLS 4 Serial Audio Interface Power SDIN1 Serial Audio Data Input 1 SDIN3 Serial Audio Data Input ks v m s e 69 NN e o fw o ma 1 _ rm ow wm 1 e o mwa 1 __ wmm eos ow o om om o won e o jw 2 w wm Ce m o won 1 om om won me 9 1 om o om omw o wo 1 om eo 3 5 19 function introduction to CD4094 1 Description CD4094BC consists of 8 bit shift register and a 3 STATE

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