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MITSUI MTV-DV05, Руководство по обслуживанию

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SERVICE MANUAL 

5

．

CHASSIS FUNCTION DESCRIPTION 

5.1. General Description 

MTV-DV05

 TV/DVD combo has combined function of TV signal reception and DVD discs playback, of 

which TV unit uses CN-12C2 chassis and DVD unit uses loader DVD 130

A

. 

CN-12C2 chassis applies a single chip IC LA76835 of Japan-based Sanyo for small signal processing, 

featuring multi system reception. The applied I

2

C bus control technology can automatically adjust and 

control the TV for much convenience of operation and servicing. Refer to Fig.4 about the chassis’ 

structure block diagram.   

Compatible with DVD, CD, VCD, SVCD, MP3, and KODAR Picture CD, DVD130

A

, high-quality modules 

with various functions, features multi angle, multilingual and multi captions. With Dolby dual channel 

amplifying and DTS coaxial cable, the DVD audio system offers astonishingly high-quality audio output.   

DVD130

A

 consists of a disc tray (including DJ-100 assembly and small loader DV-33FS) and analog 

signal processor/servo control/MPEG decoding board MMT1336E. The servo control/MPEG 

decoding board MT1369AE, developed by MEDIATEK, is designed for use in signal control, decoding, 

data processing, etc., featuring servo control, AV decoding, analog front end, DPU (DATA PATH UNIT), 

main axis control, CSS/CPPM module, system analysis program, video output unit, audio terminals and 

system control. MT1336E, also   

developed by MEDIATEK, is a high-performance CMOS analog signal processor with servo amplifying 

and DPD tracking error signal for use in CD-ROM drive and DVD-RAM. For DVD-RAM, MT1336E also 

uses DPP for developing tracking signal and DAD for processing focus signal. Meanwhile, the IC, 

programmable, is equipped with a separate DVD-ROM, CD-ROM two-way automatic laser power 

control circuit and reference voltage generator.   

5.2 Key ICs and Assemblies 

5.2.1 The CN-12C2 chassis mainly uses the following ICs and assemblies. 

Table 2 Key ICs and Assemblies of CN-12C2 Chassis 

Serial No.  Position 

Type 

Function Description 

1 D701 

CH04T12

27

Microcontroller 

2 D702 AT24C08  EEPROM 
3 N101 LA76835  Small signal processor 
4 NV01 KA2192B  TV/Video switch circuit 
5 N301 LA7840 

Vertical output circuit 

6 N191 TDA7057AQ 

Sound power amplifier 

7 

NN01 

TDA9808T 

Audio IF demodulator 

8 

NN02 

MSP3410G 

NICAM audio processor 

9 N503 LM7805  Tri-pin regulator 

10 NK01 HEF4053  Electronic switch circuit 

11 U101 TDQ-3B8/136 

Tuner 

 

 19

Содержание MTV-DV05

Страница 1: ...FILE NO SM CTV O 228 TV DVD COMBO SERVICE MANUAL MODEL NO MTV DV05 CHASSIS NO CN 12DV Please read this manual carefully before service...

Страница 2: ...TABLE OF CONTENTS SERVICE SAFETY INSTRUCTIONS 2 ADJUSTMENTS 5 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 15 SERVICE DATA 21 TROUBLESHOOTING FLOW CHARTS 65 APPENDIX...

Страница 3: ...FER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY 1 The TV has a nominal working EHT voltage Extreme caution should be exercised when working on the TV with the back removed 1 1 Do not attempt to serv...

Страница 4: ...e and servicing of this TV set Otherwise the resulted damage is not protected by the manufacturer 6 Many electrical and mechanical components in this chassis have special safety related characteristic...

Страница 5: ...the unit on a stable stand or base that is of adequate size and strength to prevent the is from being accidentally tipped over pushed off or pulled off Do not place the set near or over a radiator or...

Страница 6: ...t 1 3 Operate the TV for at least 15 minutes 1 4 Degauss the TV set using a specific degaussing coil 1 5 Set the brightness and contrast to maximum 1 6 Counter clockwise rotate the R B low brightness...

Страница 7: ...ngle between them and red and blue vertical lines are superimposed each other on the center of the screen 2 1 4 Turn both tabs at the same time keeping the angle constant to superimpose red and blue h...

Страница 8: ...2 2 6 Detach the temporarily mounted wedge and put it in either upper space Fasten the deflection yoke assembly on the picture tube 2 2 7 After fastening the three wedges recheck overall convergence...

Страница 9: ...s until the TV is degaussed completely 2 Supply Voltage Adjustment Caution B voltage has close relation to high voltage To prevent X ray radiation set B voltage to the rated voltage 2 1 Make sure that...

Страница 10: ...onds and ensure no arcing and sparking 5 2 Requirements for insulation resistance Measure resistance between naked metal of the TV and feed end of the power cord to be infinity with a DC 500 high resi...

Страница 11: ...MUTE FM MUTE 0 AUDIO MUTE AUDIO MUIE 0 VIDEO MUTE VIDEO MUTE 0 DEEM TC DE EMPHASIS TIME CONSTANT 0 SND TRAP SOUND TRAP 0 MENU 04 SUB COLOR SUB COLOR 63 SUB TINT SUB TINT 32 SUB SHARP SUB SHARP 63 AUT...

Страница 12: ...KILL OFF COLOR KILL OFF 0 AUDIO SW AUDIO SWITCH 0 T DISBLE TEST MODE SWITCH DISABLE 1 MENU 10 G Y ANGLE G Y ANGLE 0 COL KIL OP COLOR KILLER OPERATIONAL LEVEL 5 CBCR IN YCBCR INPUT 1 Y APF YCBCR MODE A...

Страница 13: ...H 0 HLOCK VDET 0 MENU 15 OPT 1CHIP OPTION 1CHIP 1 OPT VIDEO OPTION VIDEO 1 OPT DVD OPTION DVD 1 OPT AV1AV2 OPTION AV1 AV2 1 OPT AV3 OPTION AV3 0 OPT S VHS OPTION S VHS 1 OPT YUV OPTION YUV 0 OPT COMB...

Страница 14: ...PRES SCART PRESETTING SCART VOLUME 39 SCART VOL SCART VOLUME 117 OPT AVC OPTION AVC 1 AVC DECAY 2 BBE BASS BBE BASS 32 BBE TREBLE BBE TREBLE 32 Notes The data sheet may differ dependent on different m...

Страница 15: ...the following diagram will be displayed with waveform amplitude of 0 75 0 25Vpp on the oscilloscope After inspection set AUDIO OUT to ANALOG b Connect the OUT terminal on the DVD130A to the IN termina...

Страница 16: ...SERVICE MANUAL STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 1 STRUCTURE BLOCK DIAGRAM For CPU CH04T1224 Only 15 Fig 4 Structure Block Diagram for CN 12DV Chassis...

Страница 17: ...SERVICE MANUAL 3 BLOCK DIAGRAM OF SUPPLY VOLTAGE SYSTEM 16 Fig 6 Block Diagram for CN 12DV Supply Voltage System...

Страница 18: ...SERVICE MANUAL 4 BLOCK DIAGRAM OF REMOTE CONTROL SYSTEM 17 Fig 7 Block Diagram for CN 12DV Remote Control Structure...

Страница 19: ...130A Fig 8 Structure Block Diagram for DVD130A 18 Sanyo Pickup head DJ 100 EEPROM 24C01 2X16M SDRAM MT1369AE 74HCU04 CS4340 Audio DAC NJM4558M Audio Amp 8M FLASH BA5954 MT1336E L out SPDIF S VIDEO R o...

Страница 20: ...DIATEK is designed for use in signal control decoding data processing etc featuring servo control AV decoding analog front end DPU DATA PATH UNIT main axis control CSS CPPM module system analysis prog...

Страница 21: ...rd Drawing No JUV2 033 071 1MX 1 U1 MT1336E RF amplifier 2 U2 BA5954FM Focus tracking coil and feed motor drive 3 U3 MT1369AE MPEG decoder 4 U5 74HCU04 Enhancement drive 5 U7 8M FLASH Flash memory 6 U...

Страница 22: ...2 bytes OSD RAM 352 9 bits Closed Caption TV controller and the on screen display controller Closed Caption data slicer Four channels 6 bit AD Converter Three channels 7 bit PWM 16 bit timer counter 1...

Страница 23: ...SERVICE MANUAL 2 System Block Diagram Fig 9 3 Refer to Table 4 about Functions and Service Data of the IC s Pins 22...

Страница 24: ...ial interface bus I2 C Bus compatible Filtered inputs for noise suppression with Schmitt trigger Clock frequency up to 400 kHz High programming flexibility Internal programming voltage Self timed prog...

Страница 25: ...uts three sets of video signal inputs two sets of Y C separation signals inputs one set of video signal output one set of Y C separation signal output and one set of audio signal output 2 Block Diagra...

Страница 26: ...res Low power dissipation due to built in pump up circuit Vertical output circuit Thermal protection circuit built in Excellent crossover characteristics DC coupling possible 2 Block Diagram Fig 12 3...

Страница 27: ...is a stereo BTL output amplifier with DC volume control The device is designed for use in TVs and monitiors but is also suitable for battery fed portable recorders and radios Missing Current Limiter M...

Страница 28: ...ance ON state by Sn With E HIGH all switches are in the high impedance OFF state independent of SA to SC VDD and VSS are the supply voltage connections for the digital control inputs SA to SC and E Th...

Страница 29: ...ted standards VIF Automatic Gain Control AGC detector for gain control operating as peak sync detector Tuner AGC with adjustable TakeOver Point TOP Automatic Frequency Control AFC detector without ext...

Страница 30: ...SERVICE MANUAL 3 Block Diagram Fig 15 Block Diagram 4 Refer to Table 20 about Functions and Data of the IC s Pins 29...

Страница 31: ...n MNR is performed alignment free Other processed standards are the Japanese FM FM multiplex standard EIA J and the FM Stereo Radio standard Current ICs have to perform adjustment procedures in order...

Страница 32: ...68 945 577 14 R character signal input 1 43 0 920 700 15 G character signal input 1 46 0 913 701 16 B character signal input 1 44 0 906 700 17 Supply voltage for decoder 0 02 0 780 683 18 Red R signa...

Страница 33: ...l NC 2 76 805 707 45 Filter for black level stretch 3 16 762 700 46 Video detection output 2 9 397 397 47 IF lock detection filter 3 58 840 712 48 External VCO harmonic oscillating coil 4 29 526 526 4...

Страница 34: ...15 4 18 1 18 Input terminal for horizontal flyback pulse 4 62 17 4 18 4 19 R character output terminal 0 015 3 92 3 29 20 G character output terminal 0 014 3 95 3 71 21 B character output terminal 0 0...

Страница 35: ...rite in read out control terminal 0 0 0 8 Supply voltage 5 6 7 4 Table 7 Functions and Service Data of KA2192B NV01 s Pins DT890D Digital Multimeter Ground Resistance K Pin No Function Description Vol...

Страница 36: ...28 VCC 9 38 0 34 0 33 29 VCC 9 38 0 31 0 30 30 VOUT 3 17 6 47 0 48 Table 8 Functions and Service Data of LA7840 N301 s Pins DT890D Digital Multimeter Ground Resistance Pin No Function Description Volt...

Страница 37: ...ight channel in phase signal output 8 13 6 46 5 59 Table 10 Functions and Service Data of HEF4053 NK01 s Pins GDM8145 Multimeter Pin No Function Description Voltage V Positive Resistance K Negative Re...

Страница 38: ...7 8 6 17 6 Audio output NTSC 4 5MHz 2 34 7 2 5 86 7 Filter 1 79 7 9 6 29 8 1 2VCC comparison voltage bias 0 9 Video output 2 18 7 6 6 09 10 Second SIF signal output 2 03 7 7 6 17 11 Second SIF signal...

Страница 39: ...0 17 3 5 3 52 25 DACM L 0 08 3 5 3 54 26 DACM SVB NC 0 18 3 6 3 6 27 SC2 OUT R NC 3 82 7 1 5 92 28 SC2 OUT L NC 3 82 7 1 5 91 29 CREF 1 0 01 0 001 0 00 30 SC1 OVT R 3 82 7 1 5 91 31 SC1 OUT L 3 82 7 1...

Страница 40: ...SERVICE MANUAL 50 TESTEN 0 01 0 001 0 00 51 XTAL 2N 2 35 6 8 5 27 52 XTAL OUT 2 36Hs 6 8 5 3 39...

Страница 41: ...SERVICE MANUAL 40 WAVEFORMS OF KEY POINTS Switch Transistor QI S D on DVD Power PCB DVD Power PCB N01 s Pin 4 DVD Power PCB N01 s Pin 6 D701 s Pin 3 SCL D701 s Pin 4 SDA D701 s Pin 6 XT1...

Страница 42: ...SERVICE MANUAL 41 D701 s Pin 7 XT2 D701 s Pin 15 C VIN D701 s Pin 17 V SYNC D701 s Pin 18 H SYNC N101 s Pin 19 R OUT N101 s Pin 20 G OUT...

Страница 43: ...SERVICE MANUAL 42 N101 s Pin 21 B OUT N101 s Pin 23 VER OUT N101 s Pin 27 HOR OUT N101 s Pin 46 VIDEO OUT N101 s Pin 38 X TAL N101 s Pin 28 FBP IN...

Страница 44: ...SERVICE MANUAL 43 V431 C V431 B V432 B N301 s Pin2 VER OUT N301 s Pin 5 INVERTING IN V513 C V513 B V432 C...

Страница 45: ...uilt in high performance data PLL for channel data demodulation EFM EFM data demodulation Enhanced channel data frame sync protection DVD ROM sector sync protection Servo Control and Spindle Motor Con...

Страница 46: ...buffer status tracking Maximum DRAM speed is 133MHz Support 5 3 3 Volt DRAM Interface Video Decode Decodes MPEG1 video and MPEG2 main level main profile video 720 480 and 720 576 Maximum input bit rat...

Страница 47: ...LLVSS Ground Ground for data PLL and related analog circuitry 3 LPIOP Analog Output Positive output of the low pass filter 4 LPION Analog Output Negative output of the low pass filter 5 LPFON Analog O...

Страница 48: ...troller address data 0 39 IOA0 Inout Pull Up Microcontroller address 0 GPIO0 40 IOA1 Inout Pull Up Microcontroller address 1 GPIO1 41 DVDD2 Power 2 5V power 42 IOA2 Inout Pull Up Microcontroller addre...

Страница 49: ...RAM data 5 81 RD4 Inout DRAM data 4 82 DVDD2 Power 2 5V power 83 RD3 Inout DRAM data 3 84 RD2 Inout DRAM data 2 85 RD1 Inout DRAM data 1 86 RD0 Inout DRAM data 0 87 RWE Output DRAM write enable active...

Страница 50: ...round 127 RD31 Inout Pull Up Down DRAM data 31 128 RD30 Inout Pull Up Down DRAM data 30 129 RD29 Inout Pull Up Down DRAM data 29 130 RD28 Inout Pull Up Down DRAM data 28 131 DVDD3 Power 3 3V power 132...

Страница 51: ...UV4 Output Video data output bit 4 169 DVDD2 Power 2 5V power 170 YUV5 Output Video data output bit 5 171 YUV6 Output Video data output bit 6 172 YUV7 Output Video data output bit 7 173 ICE Input Pull...

Страница 52: ...AC Analog Input RF ripple detect input through AC coupling 200 RFRPSLV Analog Input RFRP slice level input 201 HRFZC Analog Input High frequency RF ripple zero crossing 202 ADCVDD8 Power Power for AD...

Страница 53: ...access of internal register through bi directional serial port to configure modes selection 2 Features RF equalizer with programmable fc from 3MHz to 70MHz and programmable boost from 3dB to 13dB MT13...

Страница 54: ...SERVICE MANUAL 3 block Diagram Fig17 MT1336 Function Block Diagram 54...

Страница 55: ...DVD RF signal input C 97 DVDD Analog Input AC coupled DVD RF signal input D 95 DVDRFIN Analog Input AC coupled DVD RF signal input RFIN 96 DVDRFIP Analog Input AC coupled DVD RF signal input RFIP 94 C...

Страница 56: ...l RF output signal V OBSO Digital Output Wobble signal output 5 RFOP Analog Output RF positive output 7 PFON Analog Output RF negative output TRACKING ERROR 32 DPFN Analog DPD amplifier negative input...

Страница 57: ...GND 2 120 WAVDD Power Wobble Power 128 118 WAGND GND Wobble GND 5 AVDDO Power Power for RF output 8 AGNDO GND GND for RF output 14 AVDDT Power Power for trimming PAD 12 AGNDT GND GND for trimming PAD...

Страница 58: ...l sensor signal 71 HALLCOS Analog input Negative input of amplifier for hall sensor signal 72 REFCOS Analog input Positive input of amplifier for hall sensor signal 70 COSPHI Analog output Amplifier o...

Страница 59: ...ring in an 8 pin package The CS4334 5 6 7 8 9 support all major audio data interface formats and the individual devices differ only in the supported interface format The CS4334 family is based on delt...

Страница 60: ...ides full conversion from digital video formats YCbCr or YUV into NTSC and PAL Composite Y C S Video and RGB or YUV analog video Input formats can be 27 MHz 8 bit YUV 8 bit YCbCr or ITU R BT656 with s...

Страница 61: ...driver 15 VOTK Non inverted output of tracking 2 CFCerr1 16 VOTK Inverted output of tracking 3 CFCerr2 Connection with capacitor for error amplifier 17 VOLD Non inverted output of loading 4 VINSL Non...

Страница 62: ...rformance characteristics Excellent channel separation allow the use of the dual device in single NJM741 operational amplifier applications providing density It is especially well suited for applicati...

Страница 63: ...ata retention 200 years 8 pin DIP or SOIC package Available for extended temperature ranges Automotive E 40 to 125 2 Description The Microchip Technology Inc 24C01B and 24C02B are 1K bit and 2K bit El...

Страница 64: ...Position Pin No Operating Voltage V 7 RF signal 0 9 1 5VP P U1 MT1336E 2 5 14 64 67 69 109 114 120 5 16 41 70 82 111 121 141 169 2 5 U3 MT1369AE 11 34 53 64 92 102 131 151 156 178 185 186 202 3 3 12 0...

Страница 65: ...r Supply 1 1 No picture sound and raster 1 2 The SMPS has no voltage output 1 3 The SMPS outputs voltage lower than the rated value TROUBLESHOOTING FLOW CHARTS SERVICE MANUAL TROUBLESHOOTING FLOW CHAR...

Страница 66: ...igher than the rated value 1 5 The power indicator lights but the SMPS is still in the Standby mode 2 Control System 2 1 The power indicator lights but the CPU cannot enter the Operation mode after po...

Страница 67: ...2 2 No characters display 2 3 Channel number remains unchanged during auto program SERVICE MANUAL 67...

Страница 68: ...3 Video Signal Processor 3 1 A horizontal bright line appears on the screen 3 2 No color but with normal monochrome picture SERVICE MANUAL 68...

Страница 69: ...4 Horizontal Vertical Scan Circuit 4 1 No raster but with sound SERVICE MANUAL 69...

Страница 70: ...4 2 No picture and no sound but with raster 5 Audio System No sound SERVICE MANUAL 70...

Страница 71: ...the DEMO PCB Programming of FLASH succeeded YES YES A NO Replace the power PCB NO Repair or replace the power PCB until the voltage output meets the requirements Detect regulators or diodes of the two...

Страница 72: ...e data received by the TV encoder for correctness NO Check peripheral circuit of the TV encoder The TV encoder outputs normally NO Check connections between the video filter video AMP and the TV Check...

Страница 73: ...l of FMSO exceeds the medium level by 1 4V NO Check the motor driver BA5954 Check the signals SL and sL for normality NO Check connection between MT1369 and BA5954 or check if MT1369 works Check conne...

Страница 74: ...n MT1336 and laser head Laser off NO Check the peripheral circuit of MT1336 Signals input to pins A B C D E and F of MT1336 NO Check circuit between MT1336 s FEO and MT1369 Check MT1336 and its periph...

Страница 75: ...between the spindle and BA5954 MT1339 outputs correct TRSO signal YES The signals T and T output normally YES YES Check MT1369 and its peripheral circuit NO Check BA5954 and its peripheral circuit NO...

Страница 76: ...uts correctly NO Check connection between MT1369 and module and the peripheral circuit of IR VFD and drive IC NO Check communication between the IR VFD control buttons and MT1369 for normality Debuggi...

Страница 77: ...Circuit Diagram for AT1314DV...

Страница 78: ...N COMB PCB ASSEMBLY...

Страница 79: ...DVD Power PCB...

Страница 80: ...BTSC PCB...

Страница 81: ...805 L16 L16 C117 C117 5VV 5VV C114 C114 D3 D3 5VV 5VV 1 1 220P 220P C118 C118 2 2 1 1 1N4148 1N4148 D5 D5 1N4148 1N4148 100U 100U C99 C99 5VV 5VV 2 2 HM102 0805 HM102 0805 FB6 FB6 HM102 0805 HM102 080...

Страница 82: ...V FILTER SUPPLY SUPPLY SDRAM Flash VideoDAC SDRAM Flash VideoDAC DEVICE DEVICE Digital 3 3V Digital 3 3V Digital 3 3V Digital 3 3V RF 5V RF 5V Digital 5V Digital 5V Servo 5V Servo 5V TYPE TYPE 1 INDEX...

Страница 83: ...77 CB77 0 1u 0 1u 47u 47u C72 C72 12V 12V TWS TWS TBCK TBCK TSD0 TSD0 MCLK MCLK DATA DATA LRCK LRCK BCK BCK LMAIN LMAIN 15 15 2 2 REF_GND REF_GND DIF1 DIF1 DEM0 DEM0 DIF0 DIF0 SBCLK SBCLK SLRCK SLRCK...

Страница 84: ...Number Document Number M24C16 W M24C16 W VCC VCC A19 A19 AD7 AD7 AD4 AD4 AD5 AD5 AD6 AD6 AD0 AD0 AD3 AD3 AD2 AD2 AD1 AD1 VCC VCC 0 1u 0 1u CB57 CB57 0 1u 0 1u CB59 CB59 SCL SCL SDA SDA V33 V33 U10 U10...

Страница 85: ...AD3 AD3 DVDD3 DVDD3 AD4 AD4 AD5 AD5 AD6 AD6 AD7 AD7 HIGHA7 HIGHA7 HIGHA6 HIGHA6 DVSS DVSS HIGHA5 HIGHA5 HIGHA4 HIGHA4 HIGHA3 HIGHA3 HIGHA2 HIGHA2 HIGHA1 HIGHA1 HIGHA0 HIGHA0 DVSS DVSS FG FG FMO FMO DM...

Страница 86: ...ing column Screw Screw Tapping screw Tapping screw 3X8VTHO 3X8VTHO Disc tray Disc tray 1 1 1 1 1 1 1 1 1 1 1 1 4 4 2 2 1 1 4 4 4 4 6 6 5 Ensure that four fins of the shield case 5 Ensure that four fin...

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