Sharp 14BM2, Service Manual

Page 1: ... 2 IMPORTANT SERVICE NOTES 2 ADJUSTMENT PRECAUTIONS 3 HOTEL MODE APPLICATION NOTE 15 TROUBLE SHOOTING TABLE 15 SOLID STATE DEVICE BASE DIAGRAM 18 CHASSIS LAYOUT 19 BLOCK DIAGRAM 22 WAVEFORMS 25 DESCRIPTION OF SCHEMATIC DIAGRAM 27 SCHEMATIC DIAGRAM MAIN UNIT 28 CRT UNIT 34 PRINTED WIRING BOARD ASSEMBLIES 36 REPLACEMENT PARTS LIST ELECTRICAL PARTS 41 MISCELLANEOUS PARTS 46 SUPPLIED ACCESSORIES 46 PA...

Page 2: ...hen wearing shatterproof goggles and after discharging the high voltage completely X RAY This receiver is designed so that any X Ray radiation is kept to an absolute minimum Since certain malfunctions or servicing may produce potentially hazardous radiation with prolonged exposure at close range the following precautions should be observed 1 14BM2 When repairing the circuit be sure not to increase...

Page 3: ...6 3 Make sure the data need modify or not Initial data Note Once the chassis has been assembly together and ready to be POWER ON for the FIRST TIME make sure to short JA122 JA124 switch to the service mode posi tion first and then turn on the main power switch See 2 1 above Precaution If haven t done this initiation it may possibly generate excessive Beam current 3 For reference please check with ...

Page 4: ...REDUCED FM DEMODULATION GAIN FOR BTSC SIGNAL BTSC A A NUMBER OF EXT AV SOURCE AV FM WINDOW SELECTION FMWS SOUND MUTE BIT 0 SM0 SOUND MUTE BIT 1 SM1 THAI LANGUAGE THA ARABIC LANGUAGE ARA MALAY LANGUAGE MAL CHINESE LANGUAGE CHI FRENCH LANGUAGE FRE RUSSIAN LANGUAGE RUS FORCED V SYNC SLICING LEVEL FSL SYNC OF OSD HP2 TUNER SELECTION CPT B B BILINGUAL BIL IF AGC SPEED BIT 0 AGC0 IF AGC SPEED BIT 1 AGC1...

Page 5: ...hout specific instruction 1 White point RED and GREEN COOL WHITE TEMP for 18000 degree colour TEMP SMEF MODELS MINUS 5 other models 123K degree colour temp still same MINUS 7 2 CDL initial data 2 for all 20 21 only EEPROM ITEMS OSD DATA LENGTH INITIAL DATA FIX ADJ REMARK SHARPNESS OFFSET NTSC358 SHP O3 0 15 12 FIX SHARPNESS OFFSET NTSC443 SHP O4 0 15 8 FIX VERTICAL SCAN DISABLE VSD 0 DISABLE 1 ENA...

Page 6: ...B G 39 40 40 41 647 25 B G 41 42 663 25 B G 42 43 679 25 B G 43 44 174 95 B G 45 175 55 B G INITIAL SETTING 1 In service mode After execute select POS 1 store the following tuning data in E2 PROM SHIPPING SETTING CHECKING 1 The following default data has been factory set for the E2 PROM ITEMS DATA SETTING LAST PROGRAM CHANNEL 1 FLASHBACK PROGARM CH 1 DIGIT 1 C SYSTEM AUTO S SYSTEM 1 SKIP OFF AFC O...

Page 7: ... the tuner cover in posi tion during this adjustment E 9 CH P C 10k 100k 1n60 75ohm IF OUT 1 5 0 8dB 1000p Oscilloscope Fig 2 Fig 3 PURITY ADJUSTMENT NO Adjustment part Adjusting procedure and conditions Waveform and others 1 PURITY ADJUSTMENT 1 Receive the GREEN ONLY signal Adjust the beam current to 700 µA 21 20 500 µA 14 2 Degauss the CRT enough with the degausing coil Note Follow the Job Instr...

Page 8: ...set Picture Normal condition 3 Connect the oscilloscope to Red OUT from IC801 TP851 14 TP852 20 21 Range 1 V Div DC Sweep 5 msec Div 4 Adjust SCREEN VR so that the tip of signal reach 3 0 0 1 Vdc CRT CUT OFF BACKGROUND AND SUB CONTRAST ADJUSTMENT NO Adjustment part Adjusting procedure and conditions Waveform and others 1 2 SUB BRIGHTNESS ADJUSTMENT I2 C BUS CONTROL 1 2 and 3 are in same black leve...

Page 9: ... procedure and conditions Waveform and others 1 SUB TINT I2 C BUS CONTROL 1 Receive the NTSC 3 58 Colour Bar signal thru AV in 2 Connect the oscilloscope to TP853 Pin 5 of P882 BLUE OUT Range 100 mV Div AC Use Probe 10 1 Sweep time 10 µsec Div 3 Call the SUB TINT mode in service mode Adjust the SUB TINT bus data to obtain the waveform shown as Fig 9 4 Clear the SERVICE mode PROTECTOR OPERATION CHE...

Page 10: ... so that it is working properly 10 SOUND SYSTEM 1 Receive PAL D K signal press the SOUND SYSTEM turn to B G I Check the sound out put is not working properly Select D K and check the sound output to make sure it is work ing properly 2 Receive PAL I signal press the SOUND SYSTEM to select B G D K Check the sound output is not working properly Select I and check the sound output to make sure it is w...

Page 11: ...PB SEC BG I DK M 00 FF 46 SM FMWS AV BTSC HTL VMC VMI 00 FF 47 HP2 FSL RUS FRA CHN MLY ARB THA 00 FF 48 AGC BIL OBA 00 FF 49 4A 4B 4C VOLUME 01 00 3C 4D CONTRAST 3C 00 3C 4E COLOUR 1E 00 3C 4F BRIGHTNESS 1E 00 3C 50 TINT 1E 00 3C 51 SHARPNESS 1E 00 3C 52 53 54 55 POSITION AV1 AV2 01 00 FF 56 FAV POS A 0A 00 FF 57 FAV POS B 14 00 FF 58 FAV POS C 1E 00 FF 59 FAV POS D 28 00 FF 5A 5B 5C POWER 00 00 0...

Page 12: ...M EEPROM CHASSIS CTV FINAL LAST INITIAL HEX D7 D6 D5 D4 D3 D2 D1 D0 DEFAULT RANGE WRITE CPU CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK C0 TUNING FREQUENCY LOWER PART POS 25 C1 S SYS AFT auto C SYS C2 TUNING FREQUENCY HIGHER PART POS 26 C3 TUNING FREQUENCY LOWER PART C4 S SYS AFT auto C SYS C5 TUNING FREQUENCY HIGHER PART POS 27 C6 TUNING FREQUENCY LOWER PART C7 S SYS AFT auto ...

Page 13: ... LAST INITIAL HEX D7 D6 D5 D4 D3 D2 D1 D0 DEFAULT RANGE WRITE CPU CHECK DATA CHECK TYPE CHECK DATA CHECK TYPE SETTING DATA REMARK 140 TUNING FREQUENCY HIGHER PART POS 68 141 TUNING FREQUENCY LOWER PART 142 S SYS AFT auto C SYS 143 TUNING FREQUENCY HIGHER PART POS 69 144 TUNING FREQUENCY LOWER PART 145 S SYS AFT auto C SYS 146 TUNING FREQUENCY HIGHER PART POS 70 147 TUNING FREQUENCY LOWER PART 148 ...

Page 14: ...ING FREQUENCY LOWER PART 193 S SYS AFT auto C SYS 194 TUNING FREQUENCY HIGHER PART POS 96 195 TUNING FREQUENCY LOWER PART 196 S SYS AFT auto C SYS 197 TUNING FREQUENCY HIGHER PART POS 97 198 TUNING FREQUENCY LOWER PART 199 S SYS AFT auto C SYS 19A TUNING FREQUENCY HIGHER PART POS 98 19B TUNING FREQUENCY LOWER PART 19C S SYS AFT auto C SYS 19D TUNING FREQUENCY HIGHER PART POS 99 19E TUNING FREQUENC...

Page 15: ... be set to 75 of full scale If you set hotel mode in AV starting channel will be the last ch which you received before power off same as normal operation CONDITION When using hotel mode the user can ONLY control PICTURE SOUND and FEATURE selection But It will return to the previous hotel mode setting condition after power off The user can t use CH SETTING OSD become violet and Preset Other functio...

Page 16: ... TP201 Does noise or signal appear at pin 38 of IC801 Check IC801 and its related circuit Check Q205 and its related circuit Does noise or signal appear at pins 23 and 24 of IC801 Check pin 1 of SF201 Tuner and related circuit Check pin 37 of IC801 and related circuit Check pin 27 of IC801 Tuner and related circuit Does the noise level increase at max Contrast Brightness and Sound controls CIRCUIT...

Page 17: ...our is magenta The picture colour is cyan Check Q870 Q885 and its adjacent circuits for 20 21 Check Q871 Q883 and its adjacent circuits for 14 Check Q871 Q883 and its adjacent circuits for 20 21 Check Q870 Q885 and its adjacent circuits for 14 Check Q872 Q887 and its adjacent circuits Check IC801 and Bias control circuit Normal NO SPECIFICATION COLOUR PAL SECAM NO COLOUR SYNCHRONIZATION NO YES YES...

Page 18: ...COLLECTOR EMITTER B C E KA7808 KA7805 BF421 BF422 LA7016 TDA7056A 1 2 3 ANODE RED CATHODE COMMON ANODE GREEN 1 2 3 SE115N STRF6653 14 STRF6654 20 21 PX0423CE 2SD1877 14 2SD2586 20 21 2R BR COLLECTOR COLLECTOR BASE EMITTER BASE EMITTER 1 3 TA48M033 1 3 5 2 4 9 TDA8357 2SC2735 JC COLLECTOR BASE EMITTER BASE COLLECTOR EMITTER SOLID STATE DEVICE BASE DIAGRAM TOP VIEW SIDE VIEW ...

Page 19: ...19 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G CHASSIS LAYOUT 14BM2S G ...

Page 20: ...20 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G CHASSIS LAYOUT 20BM2S G ...

Page 21: ...21 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G CHASSIS LAYOUT 21BM2S G ...

Page 22: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 22 23 MAIN UNIT BLOCK DIAGRAM ...

Page 23: ...24 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G BLOCK DIAGRAM CRT UNIT BLOCK DIAGRAM 14BM2S G CRT UNIT BLOCK DIAGRAM 20BM2S G 21BM2S G ...

Page 24: ...83 8Vp p 21 20 6 66 0Vp p 14 80 0Vp p 21 20 7 72 0Vp p 14 87 2Vp p 21 20 8 3 00Vp p 14 3 11Vp p 21 20 9 1 85Vp p 14 1 93Vp p 21 20 0 150Vp p 14 133Vp p 21 20 q 8 40Vp p 14 8 48Vp p 21 20 w 1 30Vp p 14 1 17Vp p 21 20 e 0 98Vp p 14 0 91Vp p 21 20 r 43 0Vp p 14 48 0Vp p 21 20 t 190 0Vp p 14 130 5Vp p 21 20 y 1 050Vp p 14 980Vp p 21 20 u 2 40Vp p 14 2 60Vp p 21 20 i 500Vp p 14 510Vp p 21 20 ...

Page 25: ...DIRECTLY CONNECTED WITH AC MAINS VOLTAGE WHEN SERVICING THE AREA CONNECT AN ISOLATING TRANS FORMER BETWEEN TV RECEIVER AND AC LINE TO ELIMINATE HAZARD OF ELECTRIC SHOCK NOTES 1 The unit of resistance ohm is omitted K 1000 ohms M Meg ohm 2 All resistors are 1 16 watt unless otherwise noted 3 Unit of all capacitors are F with prefix symbol µ P ETC VOLTAGE MEASUREMENT CONDITIONS 1 Voltage in parenthe...

Page 26: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 28 29 MAIN UNIT 14BM2S G ...

Page 27: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 30 31 MAIN UNIT 20BM2S G ...

Page 28: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 32 33 MAIN UNIT 21BM2S G ...

Page 29: ...34 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 CRT UNIT 14BM2S G CRT UNIT 20BM2S G ...

Page 30: ...35 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 CRT UNIT 21BM2S G ...

Page 31: ...7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 36 37 PRINTED WIRING BOARD ASSEMBLIES PWB A MAIN Unit Wiring Side ...

Page 32: ...1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 A B C D E F G H I J 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G 38 39 PWB A MAIN Unit Chip Parts Side ...

Page 33: ...40 14BM2 14BM2S G 20BM2 20BM2S G 21BM2 21BM2S G A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 PWB B CRT Unit Wiring Side ...

Page 34: ... 20BM2S DUNTK9988WEW1 20BM2G DUNTK9988WEW4 21BM2S G PWB A MAIN UNIT TUNER NOTE THE PARTS HERE SHOWN ARE SUPPLIED AS AN ASSEMBLY BUT NOT INDEPENDENTLY å TU201 VTUATEDE9 023 R VHF Tuner 20BM2S G BB å TU201 VTUVTST5HD84 R VHF Tuner BB 14BM2S G 21BM2S G INTEGRATED CIRCUITS IC301 VHiTDA7056A 1 R TDA7056A AP IC304 VHiLA7016 1 R LA7016 Audio SW AH IC501 VHiTDA8357 1 R TDA8357 AN IC402 VHiLA7016 1 R LA701...

Page 35: ...20BM2S G 21BM2S G å T603 RTRNZ0179CEZZ R Transformer 14BM2S G AE å T701 RTRNZ0180PEZZ R Transformer 14BM2S G Y AN å T701 RTRNZ0140PEZZ R Transformer 14BM2G AQ å T701 RTRNZ0181PEZZ R Transformer AN 20BM2S G 21BM2S G CAPACITORS C200 VCEA0A1CW476M R 47 16V Electrolytic AB C203 VCKYCY1HF103Z R 0 01 50V Ceramic AA C204 VCEA0A1CW107M R 100 16V Electrolytic AC C205 VCKYCY1HF103Z R 0 01 50V Ceramic AA C20...

Page 36: ... AA C805 VCKYCY1HB102K R 1000p 50V Ceramic AA C806 VCKYCY1HB102K R 1000p 50V Ceramic AA C807 VCKYCY1HB102K R 1000p 50V Ceramic AA C808 VCEA0A1CW107M R 100 16V Electrolytic AC C809 VCKYCY1HF223Z R 0 022 50V Ceramic AB C810 VCKYCY1EF104Z R 0 1 25V Ceramic AA C811 VCEA0A1CW107M R 100 16V Electrolytic AC C812 VCFYFA1HA224J R 0 22 50V Mylar AB C813 VCFYFA1HA224J R 0 22 50V Mylar AB C814 VCKYCY1HB471K R...

Page 37: ...Metal Film AA R501 VRN MD2AL182J R 1 8k 0 1W Metal Film AA R502 VRN MD2AL182J R 1 8k 0 1W Metal Film AA R503 VRD RM2HD1R5J R 1 5 1 2W Carbon AA 20BM2S G 21BM2S G R503 VRD RM2HD2R2J R 2 2 1 2W Carbon AA 14BM2S G R504 VRD RM2HD150J R 15 1 2W Carbon AA 14BM2S G å R505 VRG PD2HD330J R 33 1 2W Fuse Resistor AC R506 VRD RA2BE124J R 120k 1 8W Carbon AA 14BM2S G R506 VRD RA2BE224J R 220k 1 8W Carbon AA 20...

Page 38: ...J R 120k 1 2W Carbon AA R723 VRD RA2BE684J R 680k 1 8W Carbon AA å R726 VRC UA2HG825K R 8 2M 1 2W Solid AA R728 VRN MD2AL272J R 2 7k 0 1W Metal Film AA R750 VRD RM2HD4R7J R 4 7 1 2W Carbon AA R755 VRD RA2BE222J R 2 2k 1 8W Carbon AA R756 VRN MD2AL152J R 1 5k 0 1W Metal Film AA R758 VRD RA2BE102J R 1k 1 8W Carbon AA R759 VRN MD2AL102J R 1k 0 1W Metal Film AA R760 VRD RA2BE471J R 470 1 8W Carbon AA ...

Page 39: ...CNW 2433PEN1 R Connecting Cord AF 20BM2S G 21BM2S G VSP1206PB50WA R Speaker AP 20BM2S G 21BM2S G VSP9050PB25WA R Speaker 14BM2S G AM SUPPLIED ACCESSORIES ACCESSORIES RRMCG1342PESA R Infrared R C AU TiNS 7170PEZZ R Instruction Book AK QPLGJ0113CEZZ R Plug 14BM2S G AG ACCESSORY NOT REPLACEMENT ITEM TCAUA0002PEZZ Caution Card PACKING PARTS NOT REPLACEMENT ITEM SPAKC6436PEZZ Packing Case 21BM2S SPAKC6...

Page 40: ... R RC LED Cover AD 1 4 HDECA0083PESA R SP Decoration R AE 1 5 HDECA0084PESA R SP Decoration L AE 1 6 HDECQ0187PESA R SP NET R AQ 1 6 HDECQ0187PESB R SP NET R AQ 1 7 HDECQ0188PESA R SP NET L AQ 1 7 HDECQ0188PESB R SP NET L AQ 1 8 JBTN 0345PESA R Control Button 21BM2S AG 1 8 JBTN 0345PESB R Control Button 21BM2G AH 1 9 JBTN 0347PESA R Power Button AD 1 9 JBTN 0347PESB R Power Button AD 2 1 CCABB2434...