ST V02/06COLOUR TELEVISION SERVICE MANUAL 1 ICs Functional Description………………………………………………………………………… 13 9. MCU and signal Processor for a PAL/NTSC/SECAM TV………………………………………… 4 3. Safety Precautions………………………………………………………………………………… 3 2. Service and Design Data…………………………………………………………………………… 12 8. Definition of STV2248 Pin………………………………………………………………………… 6 5. Other…………………………………………………………………………………………… 15 2 . IC Voltages………………………………………………………………………………………… 14 11. Service Controlled Function………………………………………………………………………… 8 1)Service RGB adjustment………………………………………………………………………… 8 2)Service1 adjustment……………………………………………………………………………… 8 3)Service2 adjustment……………………………………………………………………………… 9 4)Service3 adjustment……………………………………………………………………………… 10 7. Remote Control Circuit Diagram and Function…………………………………………………… 7 6. Test Point Waveforms……………………………………………………………………………… 14 10.CONTENTS 1. Definition of ST92195 Pin………………………………………………………………………… 5 4. 2.5mA AC (r. Never rub it forcefully. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. 3. screwheads. etc. (…Withstand a voltage of 1100V AC (r. Alterations of the design or circuitry of the products should not be made.). If severe arcing occurs. Measure the AC voltage across the resistor with the AC voltmeter.m.s. 5.3V AC (r.2mA AC (r. this must not exceed 0. Many electrical and mechanical parts in the products have special safety-related characteristics. Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Where a short circuit has occurred. this must not exceed 0. The design of this product contains special hardware.). Move the resistor connection to each exposed metal part.m. by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10kΩ 2W resitor to the anode button. ISOLATED (NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don’t short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.). 4. remove the AC power immediately and determine the cause by visual inspection (incorrect installation.). The high voltage applied to the picture tube must conform with that specified in Service manual. etc.m. and measure the AC voltage across the resistor. video/audio input and output terminals. reverse the plug in the AC outlet and repeat each measurement. to a known good earth ground (water pipe. Connect a 1500Ω 10W resistor paralleled by a 0.2mA AC (r. The surface of the TV screen is coated with a thin film which can easily be damaged. therefore operation under excessive high voltage conditions should be kept to a minimum. observe the original lead dress.s. Extra precaution should be given to assure correct lead dress in the high voltage circuit area.s. always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals. wipe it with a soft dry cloth. This corresponds to 0. etc.) to be sure the product is safe to operate without danger of electrical shock.) for a period of one second. The difference of the GND is shown by the LIVE: ( ) side GND.5mA AC (r.m. or should be prevented. Service should be performed by qualified personnel only. Using a “Leakage Current Tester”. 10. To maintain the proper minimum level of soft X-Ray emission. in tropical area. 7.). those components that indicate evidence of overheating should be replaced. particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.s. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user.m.m. wattage. Any leakage current must not exceed 0. manufacturer’s replacement components. Some model’s power circuit is partly different in the GND. control shafts.75V AC (r. and 3000V AC (r. However. cracked or melted high voltage harness.1. Should the TV screen become soiled. components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock. measure the leakage current from each exposed metal part of the cabinet. a fuse or any parts will be broken. However. particularly any exposed metal part having a return path to the chassis. Discharge the picture tube before attempting meter connection. etc. metal cabinet. etc. For continued protection.s. (2) Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.s.s. If any repair has been made to the chassis. many circuits and components specially for safety purposes.m. When service is required. SAFETY PRECAUTIONS 1.m. Electrical components having such features are identified by shading on the schematics and by ( ！ ) on the parts list in Service manual. 11. fire.) This method of test requires a test equipment not generally found in the service trade. Use a high voltage meter or a high voltage probe with a VTVM.) the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time.s. This corresponds to 0.) 3 . poor soldering. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage. earphone jack. Any design alterations or additions will void the manufacturer’s warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom. Replacement parts must be identical to those used in the original circuits. particularly any exposed metal part having a return path to the chassis. 6.).) to an appliance rated 200V or more. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product.). arcing and possible component damage. If above note will not be kept. it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).). Any voltage measured must not exceed 0. Now.s. Excessive high voltage can cause an increase in X-Ray emission. Always use the 9.) to an appliance rated up to 120V. Do not check high voltage by drawing an arc.15µF AC-type capacitor between an exposed metal part and a known good earth ground (water pipe.). Be very careful with it when handle the TV. no changes should be made to the original design unless authorized in writing by the manufacturer. or other hazards Don’t short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. in tropical area. Never use any cleaner or detergent on it. ●Alternate Check Method Plug the AC line cord directly into the AC outlet ( do not use a line isolation transformer during this check.m. Control knobs. 8. for a periode of one second.). MCU and signal Processor for a PAL/NTSC/SECAM TV The ST92195-C7B1 is a MCU with on-screen display and Teletext data silcer. 4 . ST V02/V06 color TV block diagram ◆ ST92195 MCU+OSD+TXT controller with Software inside. ◆ TDA7449 Bus Controlled Audio processor. The STV2248 is an I2C Bus-controller multistandard signal and chip TV pressor. ◆ 24C16 Non Volatile memory(EEPROM) ◆ STV2248 Bus Controlled Mulit-standard TV Processor. ◆ TDA8174A Vertical deflection system output circuit. ◆ TDA7267 ◆ SC6122 Audio Output Remote Controlled Transmitter.2. 5 P4. I/O Port Pin Name IR IN RESET Thermal resistance control Sound-MUTE NC POWER ON/OFF NC SCART-1 NC TV/AV switch NC BUS OFF CON NC SCART-2 B G R BLANK SDA SCL VDD JTDO WSCF WSCR AVD3 TEST0 MCFM JTCK P2.3 P4.1 P2.4 P0.4 P2.1 P4.4 B G R BLANK P5.3.0 VDD JTDO WSCF WSCR AVDD3 TEST0 MCFM JTCK I I O O I/O O I I I O I I I I O I O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 I I O O O P2.3 P0.7 P0.5 XTAL XTAL P4.5 P3.2 P2.0 P3.6 P3.7 P3.3 P2.6 P4.2 P0. Definition of ST92195 Pin Pin Name Port I/O Pin No.1 P5.6 P0.0 VSYNC HSYNC AVDD1 PXFM JTRST0 GND AGND CVBS1 CVBS2 JTMS AVDD2 CVBS0 TXCF KBINPUT(AIN1) XRAY2(AIN2) VT AV1/AV2/AV3 AV1/AV2 XTAL XTAL Volume PWM output I/O O S T 9 2 1 9 5 O O I O I O O O I I SAW-SW2 SAW-SW1 BAND II BAND I SYNC HSYNC AVDD1 PXFM JTRSTO GND AGND CVBS1 CVBS2 JTMS AVDD2 CVBS0 TXCF 5 .7 P4.1 P0. Pin No.2 P4.5 P0.4 P4.0 RESET P0. Definition of STV2248 Pin 6 .4. 18.19 Remote CUSL CUSH Diode 5C 03 07 0B 0F 1B 1F 02 06 0A 0E 12 16 1A 1E 01 05 09 0D 11 Service Remote TTXXX409-S ----Pin14. Remote Control Circuit Diagram and Function OPTION 5B 45 49 4D 4C 44 55 00 04 08 0C 10 14 40 User Remote Roadstar Keymat 002 028 253 227 Pin20 Pin17.20 Service Remote NO.18.5. Code Name 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 14 16 1A 1B 1E 1F 40 44 45 49 4C 4D 0 1 2 3 4 5 6 7 8 9 SUBCODE -/-MENU I/II REVIEW V-PP MUTE TV/TXT POWER TV/AV STATUS V+ P+ VPService INDEX SLEEP MIX SIZE / ZOOM STOP TV Mode 0 1 2 3 4 5 6 7 8 9 Tens Menu switch NICAM Channel review Video PP Mute/unmute Enter txt Power on/off -Source changed Status Recall Volume + Channel + Volume Channel Service in Sleep Screen zoom/wide Menu Mode 0 1 2 3 4 5 6 7 8 9 Service Mode TXT Mode VCO Fine Service MENU Sub brightness 0 1 2 3 4 5 6 7 8 9 Subcode Shipping Line gain adjust( ) Run_time_mode_choice CYAN key YELLOW key Channel move Mute/unmute Power on/off Channel delete Power on/off Auto adjust VCO Increase value Menu item up Decrease value Menu item down Value + Item up Value Item down Service exit Exit txt Power on/off RED key BUS OFF Page plus Page minus Index GREEN key Mix Size Stop 7 .19. Service–1 menu appears and the display is as follows: Service1 HP50 VP50 VAP50 HP60 VP60 VAP60 VZM VWD CNTX COLC STINT TAGC VCOC VCOF VCOCL1 VCOFL1 VCO Status M 35 09 29 32 13 39 36 13 63 32 00 47 08 056 09 056 f=38. Press the “Service In” key again to exit Service mode.”M” is displayed on the screen. “MENU SW. j)BMIN: Brightness minimum k)ATHD(APR_threshold 00┅ 15) l)LOGO(the first shoe the length of logo. The VCO status is read from the Read register of STV 2248 and guides whether to Increase/Decrease the VCO registers to attain VCO OK Status. If the “MENU SW.9MHz TUNER IF C=0. Press the “Item up” (P+)/ “Item down” (P-) keys to move the cursor to the VCOC item and press the “Auto adjust VCO” (TV/AV) key will automatically adjust VCO Coarse and VCO Fine to get VCO OK Status. and the followed is the logo) ①Press the (-/--) key to set the screen into a horizontal line. (2)Service1 adjustment When in White Balance menu. Once in service mode.1uF OK For the VCO adjustment Feed a 38. The VCO status bar at the bottom of the screen appears only if either VCO Coarse item or VCO Fine item is selected.”(Digit 1) key displays successively the white balance ment and 3service menus. 8 .Service Controlled Function The Service mode is entered by firstly pressing the “INDEX” key then secondly pressing the “SERVICE” key when the TV is in ON condition. The parameters controlled in the White Balance menu are: a)RCUT: Red cut-off b)GCUT: Green cut-off RCUT 63 M c)BCUT: Blue cut-off d)RDRV: Red drive e)GDRV: Green drive f)BDRV: Blue drive g)SUBR: Sub Red h)SUBG: Sub Green i)BMAX: Brightness maximum. ②Press the (-/--) key again to return to the normal picture.”(Digit 1) key is pressed. Note:How to use user remote enter Service mode? Press “MENU”→“6”→“4”→“8”→“3”key (1)Service RGB adjustment The items within the White Balance mode can be accessed using “Item up” (P+)/ “Item down” (P-) keys and the selected item value is modified using “Value+” (V+)/ “Value-” (V-) keys.32 33 34 55 5B 5C CANCEL REVEAL A-PP Cancel Reveal Audio PP 6.9MHz carrier as IF input. l) STINT: Bub tint.1= only UHF band) Bit1: FAC_VID_OPTION (0:disable factory automation of VID mode.VSC.EWAP. 1: BGC bit6-4 BGC bit3-0 FGC bit3-0 the output of pin41 is low while mute status) Bit5: POS_SPEAKER_MUTE (0: the output of pin41 is high while changing pos or TV/AV.can not enter AV. 1: ▼ enable factory automation of VID mode) Bit0: POS_VID_OPTION (0: P+/P.CAN enter AV ) h)BVLP BAC bit6-4 BAC bit3-0 B7:TDA7449_AVMUTE_OPT(0: no use . f)VAP60: Vertical amplitude for 60 Hz signal. h)VWD: Vertical amplitude for wide.EWSP and EWTP no use.EWVC.VS60. g)VZM: Vertical amplitude for zoom. m)TAGC:Tuner AGC. Secondly input f =33.1: Audio output of AV is mute while Colour option: no video signal) B6：VRGB_MUTE_OPT (0:no Y mute while adjusting vertical one line. Note:VCOCL1 and VCOFL1 is SECAM LL’ （France System） use.9MHz SECAM LL’ signal from tuner IF pin and set the TV set system to SECAM-LL’ and move the cursor to “VCOCL1” then press “TV/AV” key to “OK”.* SECAM L/L’ VCO Adjustment Firstly adjustment “VCOC” to “OK”. a)BGC M Service 2 Bit7:No use VS50 00 Bit6-4:these three bits are used to set the color of title string of menu VS60 36 Bit3-0: these four bits are used to set the background color of menu VSH 24 b)FGC VSC 05 Bit7:No use VCC 07 Bit6-4:these three bits are used to set the color of title string of menu EWVC 31 Bit3-0: these four bits are used to set the background color of menu EWAP 00 c)BAC EWSP 29 Bit7:No use EWTP 22 B6~4:these three bits are used to set the character color of adjusting bar BGC 111 B3~0:these four bits are used to set the background color of adjusting bar FGC 113 d)CUSL BAC 111 Custom code low bit set CUSL 002 e)CUSH CUSH 253 Custom code high bit set MOD 050 g)MOD BVLP 192 Bit7: SERVICE_CUSTOM_CODE (0: the custom code of 8E/71 is always accepted 1: the custom code of 8E/71e is not always accepted) Bit6: KEY_MUTE_OPT (0: the output of pin41 is high while mute status.VSH. 1:firstly reduce the volume Brightness to zero . if the “MENU SW. e)VP60: Vertical position for 60 Hz signal. Some model without SECAM LL’ System. k)COLC: Colour center. 1: the output of pin41 is low while changing pos or TV/AV) Picture Bit4: VOL_SLOW_DOWN_MUTE(0:directly set the mute register of ST2248 to mute status and mute pin of ST92195 to be high. j)CNTX: Contrast maximum. then set the mute register of ST2248 to mute status and mute pin of Contrast ST92195 to be high) Color Bitit3:NO_SIGNAL_OPTION (0: the software will check the status of both FGC bit6-4 bit2 and bit3 of the only read register 0x00 of st2248 whether there is valid Sharpness signal or not. c)VAP50: Vertical amplitude for 50 Hz signal. 1: Y 0:black 1:red 2:green 3:yellow 4:blue 5: magenta 6:cyan 7:white 9 8:HBLACK(highlight black) 9:HRED 10:HGREEN 11:HYELLOW 12:HBLUE 13:HMAGENTA 14:HCYAN 15:GRAY . (3)Service2 adjustment When in Service-1 menu.” (Digit 1) key is pressed. The parameters controlled in the picture menu are: a)HP50: Horizontal position for 50 Hz signal. d)HP60: Horizontal position for 60 Hz signal. 1: the software will only check the status of bit3 of the only read register 0x00 of st2248 whether there is valid signal or not) 32 Bit2: ONLY_UHF_OPTION (0= three band.VCC. Picture and AGC Adjustment Using “Item up” (P+)/ “Item down” (P-) keys and the selected item value is modified using “Value+” (V+)/ “Value-” (V-) keys. b)VP50: Vertical position for 50 Hz signal. 1: P+/P. Service–2 menu appears and the display is as follows: VS50. P/S/N application 1=1 crystal.mute while adjusting vertical one line) B5~4: These two bits are used to set the sound system while shipping(00: BG.1=ON)(be used to set the bit6 of register 0x0c 0f stv2248) 255 OPT4 Bit3:Safty_Reset(0=active.1=ON) Bit2:RGB(DVD)( SCART RGB FOR VID) (0 =OFF. Other language are also available(Russian. 1 = SVHS auto detect) Bit3:AV3(SVHS)(SCART SVHS for VID) (0 =OFF.1=ON) Bit1:AV2(SCART AV FOR VID) (0 =OFF. if the “MENU SW. 11: LL’) B3~0：These four bits are used to set the brightness of st2248 while adjusting vertical one line and bit6 of BVLP is zero. Ukranian. Our standard OSD font is designed for European market.1= Auto) 050 HPTXT Bit5:ENG_LOG_RUS_FARSI (0= the characters of LOGO and LABEL will 15 VPTXT changed automatically while Russian language is selected.1=OFF) Bit2: Black Stretch (0=ON. 1 = According to AV1/AV2/RGB/AV3. Persian. For more details please refer to the teletext software (Sttext) user guide and the “Font management” documentation.1= use) Bit5:Woofer (0= no use. Bit2= “Run_Time_Mode Choice” The Run_Time_Mode Choice selects the user table for teletext languages.each AV channel is optional 1=AV1/SCART AV/SCART RGB/SCART SVHS. 1= the English characters 111 MISC of LOGO and LABEL will not changed automatically while Russian language is selected) Bit4: COLOR 6dB(0=OFF.1= use) Bit4: AVL (0=OFF. 1= use) e)OPT4 Bit7:AV_VID_OPTION(0=AV1/AV2/RGB(DVD)/AV3(S-AV3).1=ON) Bit0:AV1 (0 =OFF. 1 = the output of pin11 is Main audio switch output) Bit5:TVAV_VIDEO_OUT(0 =CVBSOUT2 is always CVBSIN1.1=contrast control enable) d)OPT3 Bit7:Sound demodulation (0 = intercarrier.1=ON) 00 INGN Bit0:LOGO display(0=OFF.1=OFF) Bit1: Auto Flesh(0=ON.1=non) 00 OPT5 Bit2:Power on keep standby (0 = Last power memory function.P/N/S 048 OPT2 4. 01: DK. 1= Standby state 00 STTT after power on) 187 VPL Bit1:PIF overmodulation(0=OFF.43MHz application) 016 OPT3 Bit4:Cutoff loop(0=OFF. 1= use) Bit0:TDA7449 (0= no use.1=ON) 159 SVC c)OPT2 001 HPOSD Bit7:Market_france---SECAM LL(0=OFF. CVBSOUT2 is CVBS1. Greek.CVBS2.1=ON) Bit3: APR Feature (0=ON.” (Digit 1) key is pressed.1=ON) f)OPT5 Bit0=enable the remote controller to change Run_Time_Mode Choice Bit1. Arabic. 1= use) Bit2:Pin49 Volume PWM (0 = no use.1=ON) 10 VPOSD Bit6:Manual/Auto cutoff(0= Manual . 1= use) Bit1:STV8216 (0= no use.Y/CVBS3 or Y+ C) Bit4:SVHS_SET(0 = only AV3. 10: I. this option is for VIDEOCON) B6it: TVAV_AUDIO_OUT(0 = the output of pin11 is always AM/FM demodulator output.1=OFF) Bit0: RGB OSD CONTRAST(0=contrast control disable. (4)Service3 adjustment When in Service-2 menu.1=ON) Bit3: Nicam Module of STV8216 (0= no use. 1 = QSS) Bit6:Smart volume control(0= no use. Hebrew…) ST West-europe MCU(sixteen kinds of language ： ENGLISH / FRENCH/ SWEDISH/ TURKISH/ GERMAN/ PORTUGUESE/SPANISH/ ITALIAN/ FARSI/ POLISH/ RUSSIAN/ RUMANIAN/ SERBIAN/ CZECH/ ESTONIA/ 10 . Service–3 menu appears and the display is as follows: a)AGC M AGC gain(00-03) Service 3 b)OPT1 00 AGCG Bit7~6:Thermal resistance delay time control 00:4s 01:6s 10:8s 11:10s 068 OPT1 Bit5:P/N/S crystals application (0=2 crystals. 1 =use) Bit5: XRAY_SET(0 = no use. l) VPOSD Vertical position for OSD.0 .25~863. st2248 will demodulate the input signal) Bit6:Coring(0 = no use.25H:431.25 (PIF:38.1= FS) 11 . then L:48.9Mhz))) if FS_TUNER_SET2 and FS_TUNER_SET1are both zero. n) VPTXT Vertical position for teletext .25H:431.25(PIF:38.0Mhz))) Bit3:FS_TUNER_SET1(0:unuse 1:use(L:48.9) Bit0:VS/FS (0= VS. Bit2.25M:152.25~424. Bit3=select the correct process ROM_M6_P_valid │OSDEPROM_M6_R_ valid │ROM_M6_P_valid │EPROM_M6_R_ valid EPROM_M6_R_ valid│ROMLESS_H5_P_valid │ROM_H5_P_valid │EPROM_M6_A_ valid /*note:ROMLESS_M6_R_valid=ROM_M6_R_valid*/ h) VPL Voltage protect level for XRAY (0~255) i) INGN Input gain for TDA7449 j) SVC Smart volume control for STV8216 k) HPOSD Horizontal position for OSD.75~855.25~147.25M:154.25M:147.75~863.1= PIF38. st8216 will demodulate the input signal.1= p3) Bit1:FS_380_389(0= PIF38. 1 = use ) Bit4:FS_TUNER_SET2(0:unuse 1:use(L:49.25~140.25 (PIF:38.75~144. Bit1.NEDERLAND) 0:ENGLISH / FRENCH/ SWEDISH/ TURKISH/ GERMAN/ PORTUGUESE(SPANISH)/ ITALIAN/ FARSI 1:ENGLISH / FRENCH/ SWEDISH/ CZECH / GERMAN(NEDERLAND)/ SERBIAN / ITALIAN/ FARSI 2:POLISH / FRENCH/ SWEDISH/ CZECH / GERMAN(NEDERLAND)/ SERBIAN / ITALIAN/ RUMANIAN 3:POLISH/RUSSIAN/ESTONIAN/TURKISH/GERMAN(NEDERLAND)/PORTUGUESE(SPANISH)/ITALIAN/ FARSI g) STTT …only for ST engineer Bit0= enable Stto change the process for adjusting Autogain. 1: for forced mono status.25H:432.25~423.25~423. m) HPTXT Horizontal position for teletext .9Mhz) Bit2:FS tuner UHF port set(0= p2. o) MICS Bit7: FORCED_MONO_OPTION (0: for forced mono status. Colour center. Service and Design Data SERVICE white balance SR. NO. PARAMETERS Description VALUE 1 2 3 4 5 6 7 8 9 10 11 12 RCUT GCUT BCUT RDRV GDRV BDRV SUBR SUBG BMAX BMIN ATHD LOGO 49 68 60 32 32 32 32 32 57 10 15 00 Red cut-off Green cut-off Blue cut-off Red drive Green drive Blue drive Sub Red Sub Green Brightness maximum. NO. Tuner AGC VCO coarse VCO fine VCO coarse L1 VCO fine L1 NOTE SECAM LL’ use : TAGC=28 SERVICE 2 SR.7. NO. Brightness minimum APR_threshold LOGO set NOTE SERVICE 1 SR. PARAMETERS Description VALUE NOTE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VS50 VS60 VSH VSC VCC EWVC EWAP EWSP EWTP BGC FGC BAC CUSL CUSH MOD BVLP 00 00 24 05 07 31 00 29 22 111 113 111 002/028 253/227 058 192 V saw50 V saw60 V sh(50 and 60) V sc V cc EW vdc EW amp EW shape EW trap Background color Foreground color Bar color Custom code low byte Custom code high byte Option of the software Option of the software No Use No Use No Use No Use No Use No Use No Use No Use No Use Roadstar:002 / Keymat: 028 Roadstar:253 / Keymat: 227 TACT SWITCH 6:058/TACT SWITCH 5:059 12 . Bub tint. PARAMETERS Description VALUE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 HP50 VP50 VAP50 HP60 VA60 VAP60 VZM VWD CNTX COLC STINT TAGC VCOC VCOF VCOCL1 VCOFL1 37 08 26 31 15 35 35 12 63 32 32 42 06 58 09 56 Hpos 50Hz Vpos 50Hz V size 50Hz Hpos 60Hz Vpos 60Hz V size 60Hz V zoom size V wide size Contrast maximum. SERVICE 3 SR.C. PARAMETERS Description VALUE 1 2 3 4 5 6 7 8 AGCG OPT1 OPT2 OPT3 OPT4 OPT5 STTT VPL 00 64 48 144/145 255 00 00 187 9 10 INGN SVC 11 12 13 14 15 HPOSD VPOSD HPTXT VPTXT MISC AGC gain Option 1 Option 2 Option 3 Option 4 Option 5 ST Ttext Voltage protect level for XRAY Input gain for tda7449 Smart volume control for stv8216 HPOS OSD VPOS OSD HPOS TXT VPOS TXT Option for functions SECAM LL’ no use:48 / SECAM LL’ use:176 MONO:144 / STEREO:145 AV1 USE:255 / AV1 NO USE:254 00 159 001 10 50 15 111 8． ．ICs Functional Description TDA8174A PIN 1 2 3 4 5 6 TDA7267 PIN 1 2 3 4 TDA7267A PIN 1 2 3 4 5 6 7 8 Function : Vertical Output PIN CONNECTIONS Power Out Output Stage Vs Trigger Input Height Adjustment Voltage Ref Decoupling Gnd PIN 7 8 9 10 11 Function : Audio Output PIN CONNECTIONS Vs OUT SVR IN PIN 5 6 7 8 PIN CONNECTIONS GND GND GND GND Function : Audio Output PIN CONNECTIONS Vs OUT SVR IN N.C. PIN 5 6 7 8 5 6 7 8 TDA7449(ONLY IN STEREO MODEL) PIN 1 2 3 4 PIN CONNECTIONS Ramp Generator Buffer Output Inverting Input Supply Voltage Flyback Generator PIN CONNECTIONS CREF Vs PGND ROUT PIN 11 12 13 14 PIN CONNECTIONS P-GND P-GND P-GND P-GND P-GND P-GND P-GND P-GND Function : Digitally Controlled Audio Processor PIN CONNECTIONS MUXOUT(R) BIN(R) BOUT(R) BOUT(L) 13 . NO. N.C. S-GND N. 7 25 2.0 29 2.1 STV2248 Pin Voltage 1 2.4 35 4.1 10 0.2 19 0.6 47 4.9 14 2.6 21 5.5 17 0.1 15 0.5 26 1.1 46 0.4 51 2.2 5 2.5 16 0.6 22 2.0 13 2.9 17 7.7 32 1.6 52 3.2 2 3 4 5 6 7 8 9 TDA8174A Pin 1 10 11 14 .4 31 5.0 25 5.5 7 2.1 11 0.7 24 1.1 47 5.0 26 5.8 56 1.5 3 2.0 38 0.9 33 0.0 44 0.7 41 2.0 54 0.7 27 2.8 42 5.0 16 3.3 37 0.0 Pin Voltage 39 5.0 30 1.2 6 4.0 Pin Voltage 20 2.7 34 4.4 42 2.0 29 4.8 21 2.3Vpp H V STV2248 PIN47 H V411 C V444 B ST92192 PIN50 H HEATER 75Vpp H V444 C 10.2 49 0.7 33 3.1 56 5.5 8 1.0 40 1.0 36 0.1 53 0.1 23 0.1 51 3.1 Pin Voltage 39 1.0 32 4.1 8 0.7 6 2.0 2 5.1 30 0.9 12 5.7 31 1.1 13 0.5 6 7 8 9 10 LOUT R_IN2 R_IN1 L_IN1 L_IN2 MUXOUT(L) 15 16 17 18 19 20 BIN(L) TREBLE(L) TREBLE(R) DIG_GND SCL SDA 9． ．Test Point Waveforms 2Vpp 1Vpp H STV2248 H PIN13 H STV2248 PIN18 95Vpp 3.2 Pin Voltage 20 3.0 38 2.1 54 0.8 9 2.0 9 0.1 12 0.8 41 0.2 45 7.4 36 4.1 55 3.2 53 5.1 4 5.1 46 5.8 43 0.0 40 0.0 27 1.8 23 1.4 15 4.1 48 3.9 18 3.7 28 5.8Vpp STV2248 PIN32 H STV2248 PIN31 H STV2248 PIN30 7Vpp 95Vpp 95Vpp 3.1 24 0.1 14 0.0 11 3.8Vpp 3.0 5 0.0 50 2.0 22 0.1 49 5.1 19 3.1 34 1.0 44 3.0 3 0.0 10 0.0 43 5. IC Voltages ST92195 Pin Voltage 1 5.8Vpp 5Vpp H H H CRT KR H H CRT KB CRT KG STV2248 PIN48 0.1 45 0.5Vpp STV2248 PIN49 23Vpp 1000Vpp 1.6 4 3.5 18 0.0 37 0.6 50 4.0 48 0.0 55 3.3 35 0.7Vpp 4.5 28 0.9 7 0.5 2 2.3 52 0. 0 9 4.8 1.3～3.1 8 0.3 6 4.7 4.5 0.2 176~260V 50/60Hz 11.1 STV7267A Pin Voltage 1 14.6 20 3.8～1.1 4 0.0 TDA7449 Pin Voltage 1 4.3 4.6 3 8.0 10 4.0 7 4.0 14 4.6 3 8.7V Program+ 1. b)How to use user remote enter Service mode? Press “MENU”→“6”→“4”→“8”→“3”key(within 6s).9 3.0 8 0.0 14 0.7V No use 2.0 7 0.0 16 4.8～2.0 15 0.8～3.0 11 0. f)How to realize VCO fine auto adjust: Press DIGITAL “0” key while the VCO fine item is selected at service mode g) How to set vertical scan disable: Press “-/--” key at white balance mode.3～1.0 2 7.0 10 0. Press “SERVICE” key again to exit service mode.2V Menu 2.9 6.9 3 0.Voltage 13.0 7 0.0 19 3.1 6 0.0 AC supply : 2 7.3 5 3.9 5 0.5 26.0 17 4.3～2.0 16 0.5 TDA7267 Pin Voltage 1 14.9 9 0.0 11 4. .0 18 0.0 12 4.5 8.9 5 0.2V Program1.2V AV 3.3～0.0 7.7V 15 . e)How to adjustment VCO ? Press “TV/AV” key while the VCO item is selected at service mod.0 8 4.3 26. Note: the custom code of service remote controller is:CUSL= 8E / CUSH= 71 3)Keyboard input: Key In Key Pressed Volume0.9 2 7.0 12 0. c)How to unlock TV set if you forgot password? Press “-/--” → “QV” → “1” → “7” key(within 6s).1 4 0.0 13 0.0 6 0.0 4 3.0 15 4. Other 1) binary digit change to algorism binary digit algorism Bit0 1 Bit1 2 Bit2 4 Bit3 8 Bit4 16 Bit5 32 Bit6 64 Bit7 128 OPTION2 Bit7 Bit6 Bit5 Bit4 Bit3 binary digit 0 0 1 1 0 algorism 128 64 32 16 8 binary digit 00110000= algorism 32+16=48 Bit2 0 4 Bit1 0 2 Bit0 0 1 Note: 0= N o use 1=Use 2) Some skills of factory adjustment: a)How to enter service mode? Firstly pressing the “INDEX” key then secondly pressing the “SERVICE” key.0 13 4. d)How to bus off ? Press “SLEEP” key after entering service mode.7V Volume+ 0. 2V POWER 16 .3.8～4. Edited by Foxit Reader Copyright(C) by Foxit Software Company.2005-2007 For Evaluation Only. .