Daewoo DTM-2930MP Service Manual Download Page 43 | Manualshive

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Daewoo DTM-2930MP Service Manual Download Page 43

1C DESCRIPTION

6 STR - X6756

6.1 GENERAL DESCRIPTION

The  STR-X6756  is  an  hybrid  IC  with  a  build-in  MOSFET  (Switching  regulators)  and  control  IC,
designed  for flyback
converter type switch  mode  power supply applications.

6.2 FEATURES

- Small SIP fully isolated moulded 6 pins package
- Many protection functions :

-   Pulse-by-pulse overcurrent  protection  (OCP)
-   Overvoltage  protection  with  latch  mode  (OVP)
-  Thermal  protection  with  latch  mode  (TSD)

6.3 BLOCK DIAGRAM

-41-

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Summary of Contents for DTM-2930MP

Page 1: ...TION LIST MODEL TEXT PIP ME 0 0 MP X 0 MT 0 X MZ X X Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts i...

Page 2: ...NMENT INSTRUCTIONS 5 5 CM 650TYPICAL SERVICE DATA 15 6 ELECTRICAL PARTS LIST 16 7 SCHEMATIC DIAGRAM 23 8 PRINTED CIRCUIT BOARD 24 9 MECHANICAL EXPLODED VIEW AND PARTS LIST 26 APPENDIX Appendix is prov...

Page 3: ...02 CH04 48 25MHz 62 25MHz BAND II CH05 CH12 175 25MHz 224 25MHz CABLE BAND S01 S03 69 25MHz 83 25MHz S01 S20 10525MHz 29425MHz HYPER BAND S21 S41 303 25 463 25MHz BAND IV V CH21 CH69 471 25MHz 855 25...

Page 4: ...the picture tube to avoid the shock harzard before removing the anode cap 3 Discharge the high potential of the picture tube before handling the tube The picture tube is highly evacuated and if broken...

Page 5: ...3 CIRCUIT BLOCK DIAGRAM...

Page 6: ...2 12 04 Curtain ON OFF bit setting corrected Local key option bit changed Digital eye levels added V1 04 17 12 04 Local keyboard option 01 changed V1 05 20 01 05 AV stereo and Koran options added V1 0...

Page 7: ...e g SERVICE V1 00 To exit SERVICE menu press menu key or Stand By key 4 2 SERVICE MODE NAVIGATION Pr Up Down remote keys cycle through the service items available Vol remote keys Dec lncrement the val...

Page 8: ...xt OFF Dolby Virtual ON 4 3 2 OPTION2 B7 B6 B5 B4 B3 B2 B1 BO 1 Fixed to NEC remote control AV out monitor Koran functions enabled Local key option Digital eye disabled PARS logo OFF 0 0 Daewoo Remote...

Page 9: ...TING OPTION BITS MENU Push the button OPT a third time The full sequence enter to exit is FACTORY OPTION 1 OPTION2 OPTION3 FACTORY 4 4 6 AFTER SETTING OPTION BITS Before pushing on the shipping key BR...

Page 10: ...oom selection in features menu WSS is also disabled Dolby Virtual Bit 3 Allows Doby Virtual trademark 3D effect to be available from the user control button 3D Note Dolby Virtual is only available wit...

Page 11: ...mV 620 mV TV AV Menu TV AV Prog Up 620 mV 1 06 V Vol Up Vol Dwn Prog Dwn Not used 1 06 V 1 48 V Vol Dwn Vol Up Vol Up 1 48 V 1 79 V Prog Up Prog Dwn Vol Dwn 1 79 V 2 0 7 V Prog Dwn Prog Up TV AV Digit...

Page 12: ...1 0 0 Cyrillic Latin Russia East 1 0 1 Cyrillic Latin Ukrainian East 1 1 0 Latin Latin C zech Slovak East 1 1 1 Latin Latin Rum anian East Arabic Persian 0 0 0 Latin Latin English W est 0 0 1 Latin L...

Page 13: ...st RED GRN and BLUE GAIN to the desired colour temperature 3 FOCUS Adjust the Focus volume on FBT to have the best resolution on screen 4 VERTICAL GEOMETRY Adjust V LINEAR linearity S CORRECT S Correc...

Page 14: ...howto change option bits Adjust the antenna signal level at 62 dB A 2 V Tune a colour bar pattern Find the AGC LEVEL item in service mode Press the key OK on the remote keypad and wait until AGC level...

Page 15: ...R RIGHT PROGRAM DOWN CURSOR DOWN MODE OK PRESET PIPON PIP PICTURE SWAP PIP POSITION PIP PICTURE SOURCE TV TELETEXT PIP PICTURE SIZE SLEEP ZOOM 3D SOUND EFFECT TELETEXT MODE POWER SOUND MUTE NUMBER0 9...

Page 16: ...5 BG FAL 30 PAL 40CH W B U 623 25 AUTO W B 31 FAL 2CH RETMA VL 48 25 BG AUTO FO C U S VCENTER VSIZE V SLO PEH CENTER SCREEN 32 FAL 47CH C HATCH U 679 25 I AUTO CONVERGENCE ADJUSTMENT 33 PAL 1O CH OLOR...

Page 17: ...RGP30JDO 201AD600V D812 DRGP30J DIODE RGP30JDO 201AD600V D814 DSR306E20 DIODE SR306E20 D820 DRL4A015 DIODE RL4A 015 308 LOC PART CODE PART NAME DESCRIPTION REMARK D821 DRL4A015 DIODE RL4A 015 308 130...

Page 18: ...2 3 DYPIN P402 485923182S CONNW AFER YW 025 05 STICK P501 485923202S CONNW AFER YW 025 07 STICK P601 485923172S CONNW AFER YW 025 04 STICK P701 485923172S CONNW AFER YW 025 04 STICK PA02 485923182S CO...

Page 19: ...Y Q709 TKTC3198Y TR KTC3198Y Q810 TKSA1013Y TR KSA1013Y TP Q852 TKTC3198Y TR KTC3198Y Q853 TKTC3198Y TR KTC3198Y R311 RN02B189JS RM ETALFILM 2W1 8OHMJSM ALL LOC PART CODE PART NAME DESCRIPTION REMARK...

Page 20: ...GY W IRECOPPER 1 0 6TINCOATING J418 85801060GY W IRECOPPER 1 0 6TINCOATING J419 85801060GY W IRECOPPER 1 0 6TINCOATING J420 85801060GY W IRECOPPER 1 0 6TINCOATING J601 85801060GY W IRECOPPER 1 0 6TINC...

Page 21: ...TINCOATING JA30 85801060GY W IRECOPPER 1 0 6TINCOATING JA31 85801060GY W IRECOPPER 1 0 6TINCOATING JA32 85801060GY W IRECOPPER 1 0 6TINCOATING JA33 85801060GY W IRECOPPER 1 0 6TINCOATING LOC PART CODE...

Page 22: ...11 RC 2Z825KP RCARBONCOM P 1 28 2MOHM LOC PART CODE PART NAME DESCRIPTION REMARK R812 RD 4Z102J RCARBONFILM 1 41 OHM J R814 RD AZ102J RCARBONFILM 1 61 OHM J R815 RD AZ102J RCARBONFILM 1 61 OHM J R816...

Page 23: ...W 300 PW 801 4859903110 CORDPOW ERAS KKP 419J H03VVH2 H0U 2200 A000 4859903511 CORDPOW ER CW 4232H03VVH2 F 2250 R801 DTC7R0M 270 POSISTOR PDC7R0M P6B7Z81C R803 RX10T109JS RCEMENT 10W 1OHMJTRIPODSM ALL...

Page 24: ...ECHNICIANS BEFORE RETURNING THE RECEIVER TO CUSTOMER LEAKAGE CURRENT OR RESISTANCE MEASUREMENTS SHOULD BE PERFORMED TO DETERMINE THAT EXPOSED PARTS ARE PROPERLY INSULATED FROM THE SUPPLY CIRCUIT 1 on...

Page 25: ...8 PRINTED C IR C U IT BOARD 24...

Page 26: ...P R I N T E D C I R C U I T B O A R D 2006 03 09 CM 650 P0WER 120X96...

Page 27: ...X I X LO QQ LO Q _ 25...

Page 28: ...9 M e c h a n i c a l E x p lo d e d V iew 26...

Page 29: ...gether with a FLASH embedded TEXT Control Graphics m Controller TCG m Controller and US Closed Caption decoder In addition the following functions can be added Teletext decoder with 10 page text memor...

Page 30: ...SSIF CVBSx Yx Cx Fig 2 Block diagram of the AV stereo TV processor with audio DSP IC D ESC RIPTIO N...

Page 31: ...rt 2 1 or PWM0 output 12 P3 0 ADC0 port 3 0 or ADC0 input 13 P3 1 ADC1 port 3 1 or ADC1 input 14 P3 2 ADC2 port 3 2 or ADC2 input 15 P3 3 ADC3 port 3 3 or ADC3 input 16 VDDA 3 3V supply 3 3V 17 VREF_G...

Page 32: ...or 5V 46 IFVO SVO CVBSI 2 IF video output selected CVBS output CVBS input 47 AUDIOIN4L audio 4 input left signal 48 AUDIOIN4R audio 4 input right signal 49 CVBS4 Y4 CVBS4 Y4 input 50 AUDIOIN2L audio 2...

Page 33: ...t drive output or AVL capacitor 76 VDRA vertical drive A output 77 VDRB vertical drive output 78 VGUARD SWIO V guard input I O sw itch e g 4mA current sinkingcapability for direct drive of LEDs 79 GND...

Page 34: ...er Multi standard colour decoder with automatic search system and various forced mode possibilities Internal base band delay line Indication of the Signal to Noise ratio of the incoming CVBS signal Li...

Page 35: ...tereo inputs a stereo output for SCART CINCH 1 stereo output for HEADPHONE The headphone channel has an analogue volume control circuit for the L and R channel Finally 1 stereo SPEAKER output with dig...

Page 36: ...lby Surround VDS 422 423 SRS 3D and SRS TruSurround RDS RBDS Only possible with external FM RADIO DEMOD Demodulation of the European Radio Data system RDS or the USA Radio Broadcast Data System RBDS s...

Page 37: ...Blanking Interval VBI data capture of WST data Display Teletext and Enhanced OSD modes Features of level 1 5 WST and US Close Caption 50Hz 60Hz display timing modes Two page operation for 16 9 screen...

Page 38: ...unctions Po 15W x 2ch Vcc 16 5V R l 8 Q THD 10 Built in Standby function Built in Mute function Full complement of built in protection circuis Portection from shorting to ground shorting to Vcc load s...

Page 39: ...to supply the sink current for a diode modulator circuit The IC is constructed in a Low Voltage DMOS LVDMOS process that combines bipolar CMOS and DMOS devices DMOS transistors are used in the output...

Page 40: ...OUTB Vertical output voltage 5 INEW East west input voltage 6 VGND Vertical ground 7 EWGND East west ground 8 OUTEW East west output voltage 9 V fb Flyback supply voltage 10 OUTA Vertical output volta...

Page 41: ...quired Very simple application Single supply voltage of 200V Internal reference voltage of 2 5 V Fixed gain of 81 Black current stabilisation BCS circuit with voltage window from 1 8 to 6 V and curren...

Page 42: ...Data Address Input Output 6 SCL Serial clock 7 WP Write control 8 Vcc Supply voltage 4 Vss Ground The memory device is compatible with the I2C memory standard This is a two wire serial interface that...

Page 43: ...s and control IC designed for flyback converter type switch mode power supply applications 6 2 FEATURES Small SIP fully isolated moulded 6 pins package Many protection functions Pulse by pulse overcur...

Page 44: ...Input of power supply for control circiut 5 SS OLP Delay at Overload Soft Start set up Terminal Overload Protection and Soft Opetation Time set up 6 FB Feedback terminal Constant Voltage Control Signa...

Page 45: ...nant Operation Threshold Voltagel 7 3 VoC P BD TH I 0 28 0 40 0 52 V Quasi Resonant Operation Threshold Voltage2 7 3 V0CPBD TH2 0 67 0 80 0 93 V FB Terminal Threshold Voltage 6 3 V f b o f f 1 32 1 45...

Page 46: ...multiplier In this multiplier the SIF signal is converted to the intercarrier frequency by mixing it with the regenerated picture carrier from the VCO The mixer output signal is supplied to the outpu...

Page 47: ...The selection is made with the bits SAS2 0 SO2 0 and HPO2 0 AV stereo versions without Audio DSP have no headphone output The input signal selection for the volume controlled audio outputs is realise...

Page 48: ...accurate timing of the displayed picture the input signal of the sync separator is not derived from the various CVBS Y or RGB YPrPb inputs but from the YOUT pin For this reason the YOUT pin must be c...

Page 49: ...ift Vertical zoom Vertical scroll Vertical linearity correction When required the linearity setting for the upper and lower part of the screen can have a different setting Horizontal shift EW width EW...

Page 50: ...impression of the picture Dynamic skin tone flesh control This function is realised in the YUV domain by detecting the colours near to the skin tone 7 9 Colour decoder The ICs decode PAL NTSC and SEC...

Page 51: ...lack level control is active on the Red and the Green output signal It is also possible to control the black level of the Blue and the Green output signal OFB bit 1 In the Vg2 adjustment mode AVG 1 th...

Page 52: ...ional output crossbar Master volume function The control concept for the demodulator and decoder DEMDEC is based on the following new features Easy demodulator setup for all implemented standards with...

Page 53: ...o identification frequency 117 5 Hz line freq 133 149 9 Hz line freq 105 Dual indetification frequency 274 1 Hz line freq 57 276 0 Hz line freq 57 AM modulation depth 50 50 2 CARRIERSYSTEMSWITHNICAM T...

Page 54: ...digital SSIF ADC The audio signal out of the AM demodulator is connected to the analogue crossbar at the video processor All other inputs to this multiplexer audio switch come from external either fr...

Page 55: ...e in the DEMDEC block of the Sound DSP The DEMDEC processing will be described in the next chapter The audio signals AUD ADC IN from the analogue crossbar pass the audio ADC and are fed directly into...

Page 56: ...CAM demodulation a feedback signal is added to the control word of the second carrier mixer to establish a carrier frequency loop FM AND AM DEMODULATION An FM or AM input signal is fed via a band limi...

Page 57: ...lignment word the data is de scrambled by applying the defined pseudo random binary sequence the NICAM decoder will then synchronize to the periodic frame flag bitCO The status of the NICAM decoder ca...

Page 58: ...the output sound from NICAM to what ever sound is on the first sound carrier FM or AM When the error count is smaller thanthe lower error limit the NICAM sound is restored The auto mute function can b...

Page 59: ...11 TROUBLE SHOOTING CHARTS 1 NO RASTER 57...

Page 60: ...TROUBLE SHOOTING CHARTS 2 NO PICTURE RASTER OK 58...

Page 61: ...TROUBLE SHOOTING CHARTS 3 NO COLOR 59...

Page 62: ...TROUBLE SHOOTING CHARTS 4 NO PICTURE 60...

Page 63: ...TROUBLE SHOOTING CHARTS 5 NO VERTICAL SCANNING ONE HORIZONTAL LINE RASTER 61...

Page 64: ...CHECK Speaker Connector 1 f ABNORMAL CHECK SIGNAL AT PIN NORMAL Replade 1601 2 4 OF 1601 NORMAL ABNORMAL CHECK SIGNAL AT PIN NORMAL CHECK REPLACE 57 58 1701 R602 R604 R605 R606 R606 C606 f ABNORMAL CH...

Page 65: ...D1 DVD2 NORMAL CHECK SIGNAL AT PIN ABNORMAL CHECK Signal of 49 52 55 68 69 70 OF 1701 AV1 AV2 DVD1 DVD2 NORMAL I CHECK SIGNAL AT PIN ABNORMAL CHECK REPLACE R G B 83 84 85 OF 1701 1701 NORM AL f CHECK...

Page 66: ...ARTS 8 REMOTE CONTROL UNIT TROUBLE CHECK BATTERY AND ABNORMAL REPLACE LED OF REMOCON BATTERY NORMAL CHECK IROF PREAMP ABNORMAL REPLACE AND VCC OF PREAMP IC IF01 PREAMP IC IF01 NORMAL I CHECK REPLACE 2...

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