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Colour TV 

Service Manual

 

 
 
 

Summary of Contents for 21SWS1 BN

Page 1: ...Colour TV Service Manual...

Page 2: ...2 Chas is Sanyo S01 C Ch ha as ss s si is s S Sa an ny yo o S S0 01 1 Model 21SWS1 BN Model No 21SWS1_BN Version 1 0...

Page 3: ...Y ICS ASSEMBLIES 9 SIGNAL PROCESS 10 SYSTEM BLOCK DIAGRAM 21 IC DATA SERVICE DATA 24 CIRCUIT ADJUSTEMENT 37 SERVICE MODE BUS DATA 43 TROUBLE SHOOTING FLOW CHART 48 PART LIST 50 CIRCUIT BOARD DIAGRAMS...

Page 4: ...acement component should be made after referring the PRODUCT SAFETY NOTICE below SAFETY PRECAUTION 1 The TV has a nominal working EHT voltage of 24 5KV Extreme caution should be exercised when working...

Page 5: ...t necessary be obtained by using replacements rated at higher voltages or wattage etc Components which have these special safety characteristics in this manual and its supplements are identified by th...

Page 6: ...tion is essential to prevent failure of electrical component Do not squash power supply cord under the television receiver If the television is to be built into a compartment or similarly enclosed The...

Page 7: ...ver use thinner or volatile etc 2 To ensure safety unplug the TV set when cleaning 3 Do not turn on the TV set in thundery days At lightning intervals pull off the power cord and the antenna cable 4 V...

Page 8: ...58 NTSC4 43 50 60Hz VHF C1 C12 UHF C3 C57 Receiving channel CATV Z1 Z37 Programs preset 255 Antenna input 75 unbalanced Audio output 5W THD 7 Power source 150 250V AC 50 60Hz Weight Approx 25Kg Rated...

Page 9: ...gnal processor 2 N451 TDA9302 LA78040 Vertical output circuit 3 N601 N602 LA4285 LA4287 3W 5W sound power amplifier 4 N701 LC863328B 52G5 System control micro processor 5 N801 CD4053BE Audio video swi...

Page 10: ...ing and PLL sync detecting which then are output in two ways After one set of signal is trapped to eliminate the second SIF signal cored and pre video amplified Pin 46 outputs video signals which are...

Page 11: ...essor in LA76818A mainly consist of an AV switch and filtering circuit luminance signal processor chroma signal processing color decoding RGB selection circuit which is mainly used to complete all vid...

Page 12: ...color not coinciding A luminance delay line integrated in LA76818A can adjust delay time of the delay line by the I2 C bus so that the luminance and chroma signals reach the CRT synchronously After d...

Page 13: ...cillating range VC02 is an inner oscillator with wide oscillating range Firstly oscillating signals generated from VC02 and VC01 are discriminated in APC2 then the generated error signal is filtered b...

Page 14: ...a G Y signal The three color difference signals are sent to the contrast luminance control circuit together with the Y signal Before sent to the primary matrix the color difference signals Y signal s...

Page 15: ...2 and V922 end video amplifying triodes conducting for a period of time and high voltage of the CRT discharged quickly through the end amplifying triodes Thus spot is killed when turn off 3 AUDIO SIGN...

Page 16: ...l of the N701 Pin5 Pin6 b Audio power amplifier The audio power amplifier comprises LA4287 for 21S01 The following give descriptions of the circuit on basis of LA4287 An audio signal from LA76818A s P...

Page 17: ...t is sent to the AFC1 PLL discriminator to function as a reference phase signal The second set is separated out vertical frequency pulse by the vertical sync separator and shaped into vertical sync pu...

Page 18: ...cy square wave pulse from the frequency divider functioning as a reference signal for the frequency and phase of the horizontal frequency pulse is locked in AFC1 by the horizontal sync pulse and remai...

Page 19: ...de After identification the CPU provides a narrower range of count comparison value Only when vertical frequency of the received signal changes within a very narrow range can the operation mode be cha...

Page 20: ...ch is supplied to base of V431 After amplified and pulse shaped by V431 and coupled by T431 the horizontal frequency pulse is supplied to base of V432 R433 and C433 are formed into a damping resistor...

Page 21: ...21 SYSTEM BLOCK DIAGRAMS Model No 21SWS1_BN Version 1 0...

Page 22: ...22 Model No 21SWS1_BN Version 1 0...

Page 23: ...23 Model No 21SWS1_BN Version 1 0...

Page 24: ...oil A buss eliminator is also built in the IC Video PLL detector improves video detection characteristic and picture sound quality greatly Video audio switchover switch built in Built in luminance del...

Page 25: ...25 2 Block diagram Model No 21SWS1_BN Version 1 0...

Page 26: ...d output Exchangeable with LA4285 3W LA4287 5W pin Package SIP 10HD Pitch 2 54mm straight type Heat protection loop and over voltage protection loop built in Power output 3W Vcc 19V RL 8 LA4285 5W Vcc...

Page 27: ...27 3 Refer to table 5 about functions and data of the LA4285 s Pins Model No 21SWS1_BN Version 1 0...

Page 28: ...ing possible Feature Power amplifier Flyback generator Output current up to 2 App Thermal protection Description The STV9302 is a vertical deflection booster designed for monitor and TV applications T...

Page 29: ...29 2 Block diagram 3 Refer to table 6 about functions and service data of LA78040 s Pins Model No 21SWS1_BN Version 1 0...

Page 30: ...lock line 4 55 1542 667 13 Auto brightness control input 3 8 945 577 14 R character signal input 0 9 0 920 714 15 G character signal input 0 91 0 913 701 16 B character signal input 0 85 0 906 700 17...

Page 31: ...tor connector 2 8 790 716 39 APC filter 2 5 760 697 40 Video signal output 2 3 730 662 41 Video chroma scan part ground 0 0 0 42 Video signals input from AV terminals or Y signal input from S Video te...

Page 32: ...9 4 59 4 9 Ground 0V 0 0 10 CPU use crystal oscillation port 2 28 2 63 3 76 11 CPU use crystal oscillation port 2 7V 2 84 3 71 12 Power supply 5V 5 1V 0 55 0 549 13 Key in port 0 2 78V 9 87 9 87 14 AF...

Page 33: ...DEO detection 5 1V 22 1 22 17 33 SD input port 5 1V 22 12 22 14 34 Remote control signal input 5 1V 2732 3858 35 TXT RESET 5 1V 22 15 22 17 36 Woofer on off 5 1V 22 09 22 12 37 MUTE control 0 12V 2 71...

Page 34: ...ata line 5 1 6 85 5 15 7 PW write protection terminal 5 1 9 58 5 31 8 Supply voltage 5 1 3 5 3 25 Table 5 Function and service data of LA4285 LA4287 N601 and N602 s Pins DT890D Multimeter Ground Resis...

Page 35: ...tical flyback pulse output terminal 2 25 1167 638 4 Ground 0 0 0 5 Vertical output terminal 14 8 365 360 6 Pump supply voltage input 24 5 584 7 Reference voltage 2 24 660 600 Table 7 Functions and ser...

Page 36: ...3 TV signal receiving a Press MENU key to select PRESET item Press V or V key to select SEMI SEARCH or AUTO SEARCH item press P key to start searching b Press P or P to inspect the set if there is ch...

Page 37: ...1 Vertical size adjustment a Receive Philips testing PAL system signal b Press PROD factory button to start adjusting mode c Press CH button to select V SIZE option use VOL to adjust the value of V S...

Page 38: ...normal 3 Press TV AV key to select AV input The picture and sound must be normal 4 AV output inspection Load a 75 resistor to VIDEO output terminal 1 Vp p video output signal that is from TV signal s...

Page 39: ...s hatch pattern signal 2 Turn the focus adjusting VR watching the screen and adjust the vertical line of mark to make the most thin Then the focus adj VR is set as close low voltage side as possible S...

Page 40: ...AME RANGE VARIABLE S BRI Sub Brightness Sub Brightness 0 127 R BIA Red Bias Red Bias 0 255 G BIA Green Bias Green Bias 0 255 B BIA Blue Bias Blue Bias 0 255 R DRV Red Drive Red Drive 0 127 G DRV Green...

Page 41: ...t OSD H POSI option Use VOL button to adjust the value of OSD H POSI till the characters appear in the horizontal center position 4 Press CH button on the maintenance use remote controller to select O...

Page 42: ...rom MENU 0 to MENU 12 All the adjusting menus will be available During practical manufacturing most of the options are preset in a mother chip Products of the same batch only need to copy the EEPROM w...

Page 43: ...ECAM R Y DC 8 Corresponding to SECAM R Y DC option of LA76818 range 0 15 normally 8 is selected YUV B Y DC 8 B Y DC setting for YUV range 0 15 available only if LA76818 is used YUV R Y DC 8 R Y DC set...

Page 44: ...Auto search if no program storage checked after cold start up ON OFF SEARCH CHECK 1 Search speed option LOW HIGH BAND OPTION 1 Band control option LA7910 TUNER PORT L PORT H AV OPTION 2 AV input optio...

Page 45: ...INT 32 B B BRIGHT 60 Page 8 MENU 7 PAL OPTION 1 N3 58 OPTION 1 N4 43 OPTION 1 SECAM OPTION 0 COLOR AUTO 1 4 5M OPTION 0 5 5M OPTION 1 6 0M OPTION 1 6 5M OPTION 1 Page 9 MENU 8 H FREQUENCE 32 AFC GAIN...

Page 46: ...LK SW 0 WPL OPE 0 PRE OVER ADJ 0 PRE OVER SW 0 CORING W DEF 3 Page 12 MENU 11 Y GAMMA STA 0 DC REST 3 BLK STR STA 0 BLK STR GAIN 2 A MONI SW 0 S TRAP SW 1 V LEV OFFSET 2 OVER MOD SW 0 OV MOD LEVEL 0 N...

Page 47: ...ck R491 and horizontal output transformer Check horizontal output transformer V431 V432 V902 V922 Check B3 190V line Check filament voltage Check V431 waveform normal or not Check VD551 V551 Check whe...

Page 48: ...heck C211 Check the video signal of N101 42pin Check the video signal of N801 13 pin Check the video signal of N101 46 pin No picture Check N451 VD451 normal or not Check voltage of N451 6pin Check C4...

Page 49: ...ck waveform on N801 15pin Check waveform of N101 52pin Check waveform of N101 1pin Check waveform of N101 52pin Check waveform of N101 52pin No sound Check C210 C207 C208 R205 R206 Reset according to...

Page 50: ...S RT13 1 6W 100 5 R770 D10B101J T CARBON RES RT13 1 6W 100 5 R774 D10B101J T CARBON RES RT13 1 6W 100 5 R809 D10B101J T CARBON RES RT13 1 6W 100 5 R817 D10B101J T CARBON RES RT13 1 6W 100 5 R818 D10B1...

Page 51: ...1 D10B102J T CARBON RES RT13 1 6W 1K 5 R131 D10B102J T CARBON RES RT13 1 6W 1K 5 R201 D10B102J T CARBON RES RT13 1 6W 1K 5 R232 D10B102J T CARBON RES RT13 1 6W 1K 5 R458 D10B102J T CARBON RES RT13 1 6...

Page 52: ...B472J T CARBON RES RT13 1 6W 4 7K 5 R741 D10B472J T CARBON RES RT13 1 6W 4 7K 5 R736 D10B472J T CARBON RES RT13 1 6W 4 7K 5 R738 D10B472J T CARBON RES RT13 1 6W 4 7K 5 R740 D10B472J T CARBON RES RT13...

Page 53: ...D10B103J T CARBON RES RT13 1 6W 10K 5 R754 D10B103J T CARBON RES RT13 1 6W 10K 5 R767 D10B103J T CARBON RES RT13 1 6W 10K 5 R771 D10B103J T CARBON RES RT13 1 6W 10K 5 R772 D10B103J T CARBON RES RT13 1...

Page 54: ...J T CARBON RES RT13 1 6W 22K 5 R455 D10B273J T CARBON RES RT13 1 6W 27K 5 R701 D10B273J T CARBON RES RT13 1 6W 27K 5 R711 D10B273J T CARBON RES RT13 1 6W 27K 5 R103 D10B333J T CARBON RES RT13 1 6W 33K...

Page 55: ...BON RES RT15 1 2W 2 7K 5 R918 D10D272J T CARBON RES RT15 1 2W 2 7K 5 R928 D10D272J T CARBON RES RT15 1 2W 2 7K 5 R560 D10D332J T CARBON RES RT15 1 2W 3 3K 6 R555 D10D473J T CARBON RES RT15 1 2W 47K 5...

Page 56: ...91K T CERAMIC CAPA CC1 06A SL 50 63V 390pF J C921 C2SF391K T CERAMIC CAPA CC1 06A SL 50 63V 390pF J C121 C2SF471K T CERAMIC CAPA CC1 06A SL 50 63V 470pF J C771 C2SF471K T CERAMIC CAPA CC1 06A SL 50 63...

Page 57: ...26 C2CF390J T CERAMIC CAPA CC1 06A CH 50 63V 39pF J C707 C2CF181J T CERAMIC CAPA CC1 06A CH 50 63V 180pF J C706 C2SF221K T CERAMIC CAPA CC1 06A SL 50 63V 220pF J C901 C2SF391K T CERAMIC CAPA CC1 06A S...

Page 58: ...3Z T CERAMIC CAPA CT1 06A 2F4 50 63V 0 01uF Z C729 C2FF103Z T CERAMIC CAPA CT1 06A 2F4 50 63V 0 01uF Z C802 C2FF103Z T CERAMIC CAPA CT1 06A 2F4 50 63V 0 01uF Z C432 C2BP102K T CERAMIC CAPA CT1 08C 2B4...

Page 59: ...apa CD110 16V 10uF M C931 E20C100M T Electrolytic Capa CD110 16V 10uF M C932 E20C220M T Electrolytic Capa CD110 16V 22uF M C101 E20C470M T Electrolytic Capa CD110 16V 47uF M C206 E20C470M T Electrolyt...

Page 60: ...rolytic Capa CD110 50V 0 47uF M C401 E20FR47M T Electrolytic Capa CD110 50V 0 47uF M C403 E20FR47M T Electrolytic Capa CD110 50V 0 47uF M C408 E20FR47M T Electrolytic Capa CD110 50V 0 47uF M C934 E20F...

Page 61: ...CAPA CL11 63V 0 1uF K C231 F20G104K T FILM CAPA CL11 100V 0 1uF K C458 F20G104K T FILM CAPA CL11 100V 0 1uF K C459 F20G104K T FILM CAPA CL11 100V 0 1uF K C501 F20R224M FILM CAPA CBB62 250VAC 0 22uF C...

Page 62: ...D503 DR0015XX T DIODE TVR4N TRM11C VD504 DR0015XX T DIODE TVR4N TRM11C VD505 DR0015XX T DIODE TVR4N TRM11C VD506 DR0015XX T DIODE TVR4N TRM11C VD412 DR0017XX T DIODE RGP10J VD551 DR0017XX T DIODE RGP1...

Page 63: ...2SC4584 C5586 2SD2498 V104 RXC945XX T TRANSISTOR 2SC945 2SC1815 2SC536E KTC3198 Y V105 RXC945XX T TRANSISTOR 2SC945 2SC1815 2SC536E KTC3198 Y V552 RXC945XX T TRANSISTOR 2SC945 2SC1815 2SC536E KTC3198...

Page 64: ...0008XX SAW FILTER38 9M F2966M F501 FXXX0020 FUSE 3 15A 250V A701 RXXX0016 REMOTE RECEIVER HS0038 AT138A G201 XC0004XX A Crystal Oscillator JA18C JA18B 4 43MHz G701 Porcelain 32 768KHz A101 TUNER ET 5C...

Page 65: ...65 CIRCUIT BOARD DIAGRAMS Model No 21SWS1_BN Version 1 0...

Page 66: ...66 M V odel No 21SWS1_BN ersion 1 0...

Page 67: ...67 Model No 21SWS1_BN Version 1 0...

Page 68: ...68 Model No 21SWS1_BN Version 1 0...

Page 69: ...69 EXPLODED VIEW Model No 21SWS1_BN Version 1 0...

Page 70: ...70 Model No 21SWS1_BN Version 1 0 EXPLODED VIEW...

Page 71: ......

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