Teac-AGD-7900-Service-Manual电路原理图.pdf

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1、A AG G- -D D7 79 90 00 0 SERVICE MANUAL AV Digital Home Theater Receiver Effective : February, 2002S-0000A NOTES PC boards shown are viewed from parts side. The parts with no reference number or no parts number in the exploded views are not supplied. As regards the resistors and capacitors, refer to

2、 the circuit diagrams contained in this manual. Parts marked with this sign are safety critical components. They must be replaced with identical components - refer to the appropriate parts list and ensure exact replacement. RadioFans.CN 收音机爱 好者资料库 2 CONTENTS SPECIFICATIONS.3 SAFETY INSTRUCTIONS .4 M

3、EASUREMENTS AND ADJUSTMENTS .5 FIP DISPLAY .8 DISPLAY PIN CONNECTION .9 IC BLOCK DIAGRAMS AND PIN FUNCTIONS .10 EXPLODED VIEWS AND PARTS LIST .22 PC BOARDS AND PARTS LIST .24 INCLUDED ACCESSORIES .30 RadioFans.CN 收音机爱 好者资料库 3 Amplifier Section Surround Output Power (0.9 % THD, 1 kHz, 8 ohms): 60 + 6

4、0 watts (Front) 60 watts (Center) 60 + 60 watts (Rear) Delay Time: DOLBY DIGITAL: REAR 0 15 ms CENTER 0 5 ms DOLBY PRO LOGIC: REAR 15 30 ms Audio Input Sensitivity/Impedance: *LINE: 220 mV/47 k ohms Output Level/Impedance: CD-R/TAPE REC: 200 mV/2.2 k ohms Frequency Response: *LINE: 20 Hz 65 kHz, +1/

5、 3 dB Signal-to-Noise Ratio: *LINE: 95dB (IHF-A) Tone Control: BASS: 10 dB at 100 Hz TREBLE: 10 dB at 10 kHz Digital Audio Section Sampling Frequency:32 kHz, 44.1 kHz, 48 kHz, 96 kHz DIGITAL Input Level/Impedance: DIGITAL 1, 2 (OPTICAL): 15 dBm 21 dBm DIGITAL 3 (COAXIAL): 0.5 Vp-p / 75 ohms FM Tuner

6、 Section (Without notes 100.1 MHz, 65 dBf) Tuning Range: 87.5 MHz 108.0 MHz (100 kHz steps) Usable Sensitivity (IHF): Mono: 11.2 dBf 50 dB Quieting Sensitivity: Mono: 15.3 dBf Stereo: 38.5 dBf Capture Ratio:2.0 dB Image Rejection Ratio: 45 dB AM Suppression Ratio: 55 dB Total Harmonic Distortion (1

7、kHz): Mono: 0.4% Stereo: 0.5% Frequency Response:30 Hz 15 kHz, +1/ 1.5 dB Stereo Separation (1 kHz):40 dB Signal-to-Noise Ratio: Mono: 75 dB Stereo: 70 dB AM Tuner Section Tuning Range: 530 kHz 1,720 kHz (10 kHz steps) Usable Sensitivity:55 dB/m Total Harmonic Distortion:0.8% at 85 dB/m Signal-to-No

8、ise Ratio:45 dB at 85 dB/m Video Section Input Sensitivity/Impedance:1.0 Vp-p/75 ohms Output Level/Impedance:1.0 Vp-p/75 ohms General Power Requirements: 120 V AC, 60 Hz (U.S.A./ Canada model) 120/230 V AC, 50-60Hz (General Export model) Power Consumption: 2.5 A AC Outlets: Switched x 2, Total 100 W

9、 max. (1 A max.) Dimensions (W x H x D) 435 x 165 x 350 mm (17-1/8 x 6-1/2 x 13-3/4) Weight (net): 8.2kg (18-1/16lbs) (U.S.A./ Canada model) 8.4kg (18-1/2lbs) (General Export model) Standard Accessories: AM Loop Antenna x 1 FM T-type Antenna x 1 Remote Control Unit (UR-417) x 1 *LINE means CD, CD-R/

10、TAPE, VCR/VIDEO 1, DBS/VIDEO 2, DVD/VIDEO 3 and AUX/VIDEO 4. Improvements may result in specifications and features changing without notice. Illustrations may differ slightly from production models. SPECIFICATIONS 4 SAFETY INSTRUCTIONS PRECAUTIONS DURING SERVICING 1. Parts identifide by the ( )symbo

11、l parts are critical for safety. Replace only with parts number specified. 2. In addition to safety, other parts and assemblies are specified for conformance with such regulations as those applying to spurious radiation. These must also be replaced only with specifide replacements. Examples :RF conv

12、erters, tuner units, antenna selectswitches, RF cables, noise blocking capacitors, noise blocking filters, etc. 3.Use specified internal wiring. Note especially : 1) Wires covered with PVC tubing 2) Double insulated wires 3) High voltage leads 4. Use specified insulating materials for hazardous live

13、 parts. Note especially: 1) Insulation Tape 2) PVC tubing 3) Spacers(insulating barriers) 4) Insulation sheets for transistors 5) Plastic screws for fixing micro switches 5. When replacing AC primary side components (transformers, power cords, noise blocking capacitors, etc.), wrap ends of wires sec

14、urely about the terminals before soldering. 6. Make sure that wires to do not contact heat producing parts (heat sinks, oxide metal film resistors, fusible resistors, etc.). 7. Check that replaced wires do not contact sharp edged or pointed parts. 8. Also check areas surrounding repaired locations.

15、9. Make sure that foreign objects (screws, solder droplets, etc.) do not remain inside the set. MAKE YOUR CONTRIBUTION TO PROTECT THE ENVIRONMENT Used batteries with the ISO symbol for recycling as well as small accumulators (rechargeable batteries), mini-batteries (cells) and starter batteries shou

16、ld not be thrown into the garbage can. Please leave them at an appropriate depot. All other house- hold batteries can be thrown out with the household waste. SAFETY CHECK AFTER SERVICING After servicing, make measurements of leakage-current or resistance in order to determine that exposed parts are

17、acceptably insulated from the supply circuit. The leakage-current measurement should be done between accessible metal parts (such as chassis, ground terminal, microphone jacks, signal input/output connectors, etc.) and the earth ground through a resister of 1500 ohms paralleled with a 0.15 capacitor

18、, under the units normal working conditions. The leakage-current should be less than 0.5mA rms AC. The resistance measurement should be done between accessible exposed metal parts and power cord plug prongs with the power switch (if included) ON. The resistance should be more than 2.2M Ohms. PRECAUT

19、IONS IN REPAIRING When repairing or adjusting the unit, please note the following points. 1. Do not put excessive pressure on the mechanical part (operation part), including the pick-up block, as extremely high mechanical precision is required in these parts. 2. When the base is removed for repair a

20、djustment, make sure that there are no metal obiects in the narrow gap between the P. C. board or the mecha parts and the base 3. The Micro-Computer and the CD signal processing ICs can be damaged by static electricity or leakage from a soldering iron during repairing. While soldering, please take t

21、he precautions against leakage as in the illustration. 4. Do not loosen any screws in the pick-up block. When handing the pick-up block, please refer to the points to NOTE when replacing the pick-up block. 5. Keep safety for hazardous invisible Laser Radiation, DO NOT watch the Laser Beam (Objective

22、 lens) directly. 6. Models for some countries, laser warning labels are affixed on the unit and inside of the unit, as shown below. Read it carefully for your safety, when repairing or adjusting the unit. GND ALIGNMENT INSTRUCTIONS EQUIPMENT NEEDED: AM Signal Generator FM Signal Generator Oscillosco

23、pe VTVM(AC, DC) Test loop antenna (AM Adjustment) Dummy antenna (FM Adjustment) Distortion analyser IMPORTANT 1. Check power-source voltage. 2. Set the function switch to band aligned. 3. Keep the signal input as low as possible to adjust accurately. 4. Modulation and modulation frequency. Item Modu

24、lationModulation frequency Band AM30%400Hz FM400Hz ADJUSTMENT POINT MEASUREMENTS AND ADJUSTMENTS 100% (40 kHz Dev.) E/UK 100% (75 kHz Dev.) US AM LOOP ANT ANT TERMINAL CT10 PACK1 IC11 J208 VR11VR13 IC12 T102 FM ANT VR12 J207 J205 L104L105 T101 (FOR UL version) L3 L7 L4 L5 L6 L3 L7 T1 L6 L4L5 L3 L6 L

25、4 FM OSC COIL T1FM IFT FM OFFSET ADJ TP CT10 AM ANT TRIMMER (1503kHz/1510kHz) L104 AM ANT COIL L105 AM OSC COIL T101 FM IFT COIL T102 AM IFT COIL (612kHz/610kHz) VR13 FM SD ADJUSTMENT VR12 AM SD ADJUSTMENT VR11 FM SEPARATION ADJ J208 FM/AM VT J205 J207 FM ANT COIL FM RF COIL (FOR EUR version) L1 L2

26、L6 L3 L4 L5 L1L2 L5 L7 IFT FM OSC COILL7 FM ANT COIL FM RF COIL 5 1.TUNING FREQUENCY RANGE ADJUSTMENTS (FM) DC VOLTMETER . CONNECT TO TEST POINT J208 and GND NO.BandFrequencyAdjust forAdjustment 1FM87.50MHz1.6VL7 2AM530 kHz1VL105 US/C530 kHz1VL105 2.AM TRACKING ADJUSTMENT Signal Generator. Connects

27、to the AM ANT. Coil through the loop antenna. Adjust for the indication of VTVM of the wave form of scope to be maximum. BANDStepFrequencyAdjust forAdjustment 1610 kHzMaximum sensitivityT102, L104 US/C610 kHzMaximum sensitivityT102, L104 21510 kHzMaximum sensitivityCT10 US/C1510 kHzMaximum sensitivi

28、tyCT10 3Repeat steps 1 and 2 several times. AM J208 3.FM-RF ADJUSTMENT Signal Generator. Connect to FM ANT JACK (FM IN) through the dummy. NO.FrequencyAdjust forAdjustment 190.10MHzMaximum SensitivityL3, L5, L6 2Repeat step 1 several times. 6 4.FM MONO DISTORTION ADJUSTMENT DC VOLT METER.Connect to

29、J205 (-), J207 (+) through the chock coil (100uH). Signal Generator.Connect to FM ANT Jack (FM IN) through the dummy. Distortion Meter .Connect to the output. NO.FrequencyAdjust forAdjustment 1100.10MHz 2100.10MHz 3Repeat steps 1 and 2 several times. 5.FM/AM AUTO STOP LEVEL ADJUSTMENT FM Signal Gene

30、rator.Connect to FM ANT Jack (FM IN) through the dummy. AM Signal Generator.Connect to AM ANT. Coil through the Loop antenna. J205 J207 DC Voltmeter 0V Minimum T.H.D 7 DC Voltmeter 0VT101 T101 BANDStep Signal Generator Adjust for Adjustment 1 990KHz 82dB Display ON VR12 US/C990KHz 2 990KHz 81dB Disp

31、lay OFFVR12 US/C990KHz 1 100.1MHz 32dBDisplay ON VR13 2 100.1MHz 31dB Display OFF VR13 TUNED TUNED TUNED TUNED AM FM 8 10G9G8G7G6G5G4G3G2G1G P1SOURCEd2d2d2d2d2d2d2d2kHz P2AUXd1d1d1d1d1d1d1d11d P3LDeeeeeeee1e P4DVDrrrrrrrr1c P5VCR 1pppppppp1g P6RECnnnnnnnn1f P7cccccccc1b P8SP.ffffffff1a P9AggggggggM

32、P10Bmmmmmmmm2d P11CHURCHhhhhhhhh2e P12DISCOjjjjjjjj2c P13STADIUMkkkkkkkk2g P14HALLbbbbbbbb2f P15THEATERa2a2a2a2a2a2a2a22b P16PCMa1a1a1a1a1a1a1a12a P17AC-3S1S1S1S1S1S1S1S1DELAY.T P18STEREOS2S2S2S2S2S2S2S2PRESET CH. P193S3S3S3S3S3S3S3S3MEMO P20S4S4S4S4S4S4S4S4TAPE P21DIGITALRDSDpTAMHz P22PRO LOGICDTST

33、UNEDSTEREOPTYRTTPmS ANODE CONNECTION FIP DISPLAY 9 Pin No.4647 F1F1 Pin No.313233343536373839404142434445 NXNXNXNX1G2G3G4G5G6G7G8G9G10GNP Pin No.161718192021222324252627282930 P14P13P12P11P10P9P8P7P6P5P4P3P2P1NX Pin No.123456789101112131415 F2F2NPNXNXNXNXP22P21P20P19P18P17P16P15Connection Connection

34、 Connection Connection PIN CONNECTION 471 PIN No.SYMBOLI/ODESCRIPTION 1,25VDD-Power Supply Port(+5V) 2,3Function SW1,SW2IFunction Encoder Control Port 4Speaker ON/OFFOFront Speaker Relay Drive Port(“H”) 5NC-Not Use(No connection) 6DSP ResetOReset (Initial Clear) Port for YSS912 7Surr. CLKOSurr. CLK

35、Output Port 8DATA OUTOData Output Port for YSS912 9Surr. DATAOSurr. DATA Output Port 10CSOChip Selector Port for YSS912 11CSOChip Selector Port for AK4112 12CSBNOSub DSP Chip Selector for YSS912 13,14RDS CLK/DATAIRDS IC(SA6579TV1) CLK/DATA Port 15Stereo INIStereo Display Control Port(L) 16Tuned INIT

36、uned Display Control Port(L) 17 21KEY MatrixIResistor Divide Key Control Input (17,18 Pin: NOT USE) 22,30Vss-Device GND Port 23Vass-Device Analog GND Port 24Varef-A/D Converter Reference Voltage 26BACKUPIBack Up Mode Control Input 27TEST-NC(GND) 28,29VOLUME UP/DOWNIMaster Volume Up/Down Control Port

37、 31X INI 8MHz Crystal Connection Port 32X OUTO 33RESET (L)IReset Input 34REMOTE INIRemote Control Sensor Data Input 35BUS IN(NC)ISystem Remote Control Input(No Connection) 36HEADPHONE INOHeadphone JACK INPUT(“H”) - Connet to GND 37E.VOL.DATAO 38E.VOL.CLKIElectronic Vol. IC(M62446FP) DATA/CLK/STB Por

38、t 39E.VOL.CEO 40PLL.DATA INIPLL IC (LC72131) DATA Input Port 41PLL.CEOPLL IC (LC72131) Chip Enable Control Port 42DATA 3OFunction IC Data Input Port 43CLK 3OFunc./PLL IC CLK Control Port 44FUNC. STBOFunction Strobe Control Output 45FUNC. MUTEOFunction Mute Control Output(“H”) 46SURR. MUTEOSurrounc M

39、ute Control Output(“H”) 47Power ON/OFFOPower ON/OFF Control Port(H) 48SURR. HOSurr. ON/OFF Contol Port(H) 49PROTECT INIProtect Input Port(L) 50FIP Vkk-FIP (FLT) -28V Negative Power Supply For FIP Blinking 51 60FIP GridOFIP (FLT) Grid Control Outputs 61 82FIP SegmentOFIP (FLT) Segment Control Outputs

40、 83 86OptionlArea/Function Option Ports 87 94N.C-Not Use(No connection) 95SUB. LEDOSubwoofer LED Drive Port 96MUTE LEDOMUTE LED Drive Port 97 99VIDED A/B/COVideo IC(NJM2296M/LA7952) Control Ports 100N.C-Not Use(No connection) IC PIN FUNCTION (u-COM : ANAM1308AT,O.T.P :TMP87PM78F) : IC71 10 11 PIN No

41、.SYMBOLI/ODESCRIPTION 1,31,71 2 3 4 5 6 7 8 9 10, 30 11 12 13 14 15 16 17 18 19 20 21,41,51,81,91 22 23 24 25 29 32 35 36 39 40,50,60,80,90,100 42 44 45 47 48 49 52 53 54 55 56 57 58 59 61 62 63 64 65 66 67 68 69 VDD1 RAMCEN RAMA16 RAMA15 SDIB0 SDIB1 SDIB2 XI XO VSS AVDD SDIB3 TEST TEST OVFB DTSDATA

42、 AC3DATA SDOB3 CPO AVSS VDD2 SDOA2 SDOA1 SDOA0 RAMA 1410 OPORT 03 OPORT 47 VSS RAAM 97 SDOB 20 SDBCK1 SDWCK1 NONPCM CRC MUTE KARAOKE SURENC /SDBCK 0 RAMA6 RAMA5 RAMA4 /IC TEST RAMA3 /CSB /CS SO SI SCK - O O O I+ I+ I+ I+ O - - I+ - - O O O O A - - O O O O O O - O O I+ I+ O O O O O O O O O Is - O Is+

43、 Is Ot Is Is +5V Power Supply(for I/Os) External SRAM interface /CE External SRAM interface address 16 External SRAM interface address 15 PCM input 0 to Sub DSP(not use) PCM input 1 to Sub DSP(not use) PCM input 2 to Sub DSP(not use) Crystal oscillator connection(12.288MHz) Ground +3.3V power supply

44、 (for PLL circuit) PCM input 3 to Sub DSP(not use) Test terminal(to be open in normal use) Test terminal(to be open in normal use) Detection of overflow at Sub DSP (not use) Detection of DTS data (not use) Detection of AC-3 data (not use) PCM output from Sub DSP Output terminal for PLL,to be connect

45、ed to ground through the external analog filter circuit Ground for PLL circuit) +3.3V power supply (for core logic) PCM output from Main DSP (C,LFE) PCM output from Main DSP (LS,RS) PCM output from Main DSP (L,R) External SRAM interface address 1410 Output port for general purpose Output port for ge

46、neral purpose (not use) Ground External SRAM interface address 97 PCM output from Sub DSP Bit clock input for SDOA,SDIB,SDOB (not use) Word clock input for SDOA,SDIB,SDOB (not use) Detection of non-PCM data (not use) Detection of AC-3 CRC error (not use) Detection of auto mute (not use) Detection of AC-3 karaoke d