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COLOR TELEVISION

SERVICE

MANUAL

21" T2S10 CHASSIS WITH NICAM&TELETEXT

CONTENTS
SAFETY PRECAUTION ......................................................... 1 SPECIFICATION .................................................................. 2 IC'S GENERAL DESCRIPTION ............................................. 3 SPECIAL IC INTRODUCTION ................................................ 3 CHASSIS BLOCK DIAGRAM ................................................ 12 SERVICE MODE&ADJUSTMENT .......................................... 13 TEST POINT WAVE FORM&SCHEMATIC DIAGRAM ............... 18

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SAFETY PRECAUTION
1. X-RAY RADIATION PRECAUTION
1.1 Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards the high voltage must be specified limit. The normal value of the high voltage of this receiver is 21" 25KV 500V under 230V AC power source. The high voltage must not exceed 26KV for 21" TV 1.2 Each time a receiver requires servicing the high voltage should be checked following the HIGH VOLTAGE CHECK procedure in this manual. It is recommended the reading of the high voltage be recorded as a part of the service record. It is important to use an accurate and reliable high voltage meter. 1.3 The primary source of X -RAY RADIATION in this TV receiver is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as used in this TV receiver. 1.4 Some parts in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only after referring the PRODUCT SAFETY NOTICE below.

2. GENERAL SAFETY PRECAUTION
The following are the necessary precautions to be observed before servicing this chassis WARNING: Service should not be attempted by anyone unfamiliar with the necessary 2.1 Since the power supply circuit of this receiver is directly connected to the AC power line. An isolation transformer should be used during any dynamic service to avoid possible shock hazard. 2.2 Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube is highly evacuated and if broken, glass fragments will be violently expelled. Use shatterproof goggles and keep picture tube away from the unprotected body while handling. 2.3 When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as: nonmetallic control; knobs, insulating covers, shields, isolation resistor-capacitor, network, etc. 2.4 Connection wires must be kept away from components with high voltage or high temperature. 2.5 When replacing parts or circuit boards, disconnect the power cord. 2.6 When replacing a high voltage resistor (metal oxide resistor) on circuit board, keep the resistor APP. 10mm (1/2 in.) away from circuit board. 2.7 If any fuse in this TV receiver is broken, replace it with the FUSE specified in the chassis parts list. 2.8 The receiver is designed to operate with 230V (50Hz) AC mains.

3. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics are often passed unnoticed by a visual inspection and the X-RAY RADIATON protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire, X-RAY RADIATION or other hazards.

Warning!
There are no any repairable components in this TV set. Do not try to make any change to it. High voltage inside may cause danger.

SPECIFICATION
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RF SYSTEM VIDEO SYSTEM TUNING SYSTEM RECEIVING CHANNEL PROGRAM PRESET AV JACKS TELETEXT ANTENNA INPUT AUDIO OUTPUT MAIN POWER POWER CONSUMPTION

COLOR SYSTEM: PAL SECAM SOUND SYSTEM:B/G D/K I NICAM STEREO PAL SECAM NTSC4.43 VOLTAGE SYNTHESIZER TUNING VHF-L: E2S6 48.25 MHz140.25MHz VHF-H: S7S36 147.25 MHz423.25MHz UHF: S37DS57 431.25 MHz863.25MHz 99 1 SIDE RCA AV IN 1 FULL SCART AND 1 AV SCART 1PAGE 75UNBALANCE 5W 170-260V AC 50/60Hz 21" 90W

CHIP GENERAL DESCRIPTION
1. MAIN BOARD PART
IC101 IC102 IC201 IC301 IC601 IC603 IC605 IC602 IC701 IC801 ST92195 24C08 STV2246 TDA8174A H11A817C MC7808CT MC7805CT CD7522CS STV8216 MCU With ON SCREEN DISPLAY and TELETEXT Decoder 8 Kbit Serial I2C Bus EEPROM IC BUS-Controlled Multistandard Single Chip TV Processor VERTICAL DEFLECTION W.E/W CORRECTION CIRCUIT OPTOCOUPLERS +8V VOLTAGE REGULATOR +5V VOLTAGE REGULATOR 7W AUDIO AMPLIFIER Multi-standard TV Audio Processor and Digital Sound Demodulator

CHIP INTRODUCTION
1. ST92195
The ST92195 microcontrollers are developed and manufactured by STMicroelectronics using a proprietary n-well HCMOS process. Their performance derives from the use of flexible 256-register programming model for ultra-fast context switching and real-time event response. The intelligent on-chip peripherals offload the ST9 core from I/O and data management processing tasks allowing critical application tasks to get the maximum use of core resources. TheST92195 MCU support low power consumption and low voltage operation for power-efficient and low-cost embedded systems.

1.1 Main features
28 fully-programmable I/Os 4 channels Analog/Digital Converter Built in I2C bus interface Built in OSD and Teletext decoder 14-bit Voltage Synthesis PWM output for VS tuning system -2-

1.2 Pin description
Pin No. 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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Pin Name P2.0 RESET P0.7 P0.6 P0.5 P0.4 P0.3 P0.2 P0.1 P0.0 P3.7 P3.6 P3.5 P3.4 B G R BLANK P5.1 P5.0 VDD JTDO WSCF WSCR AVDD3 TEST0 MCFM JTCK TXCF CVBSO AVDD2 JTMS CVBS2 CVBS1 AGND GND JTRST0 PXFM AVDD1 HSYNC VSYNC P4.0 P4.1 P4.2 Signal Name IRIN RESET NC MUTE NC ON/OFF DESIGN SCART1 SCART2 AV SEL S0 S1 TV/DVD DFD B G R BLANK SDA SCL VDD JTDO WSCF WSCR AVDD3 TEST0 MCFM JTCK TXCF CVBSO AVDD2 JTMS CVBS2 CVBS1 AGND GND JTRST0 PXFM AVDD1 HSYNC VSYNC BSW1 BSW2 SAW_SW1 I/O I I I/O O I/O O I I I O O O O O O O O O I/O O Function IR Input Hardware Reset Not Used Mute Output PIN Not Used Standby Output Service menu control Identify scart entering Design Identify scart entering Design AV Selection AV/TV AV/TV TV/DVD Default data control OSD Blue colour Signal Output OSD Green colour Signal Output OSD Red colour Signal Output OSD Blanking Output I2C data line I2C clock line +5 V Digital Supply Test Pin Analog Pin For VPS / WPP slicer line PLL Analog Pin For VPS / WPP slicer line PLL +5V Analog VDD For PLL Test Pin Analog Pin for display pixel freq. multiplier Test Pin Analog pin for VPS /WSS line PLL Test Pin Analog Power supply Test Pin CVBS In for VPS / WSS CVBS In for Teletext Slicer Analog ground Digital ground Test Pin Analog Pin for display pixel freq. multiplier Analog Power Supply Horizontal Sync Input Vertical Sync Input Band switch 1 Band switch 2 SAW Filter switch 1

I I

I I O O O -3-

45 46 47 48 49 50 51 52 53 54 55 56

P4.3 P4.4 P4.5 P4.6 P4.7 XTAL XTAL P2.5 P2.4 P2.3 P2.2 P2.1

NC SAW_SW2 NC Vlin PWM VOL PWM XTAL XTAL LED2 LED1 VS NC KB INPUT

I/O O I/O O O

O O O I/O I

Not connected SAW Filter switch 2 Not connected V-linearity PWM output VOL PWM output Clock oscillator Clock oscillator LED driver LED driver VST Voltage ouput Not connected KEY Input

1.3 Block diagram

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1.4 General application description
BAND SWITCH OUTPUT (Pin42 Pin43) Pin42 BSW1 0 0 1 1 KEY IN (Pin 56) 0.285 ~ 0.587V 0.706 ~ 1.098V 1.204~ 1.596V 1.704 ~ 2.096V 2.194 ~ 2.586V 2.704 ~ 3.096V 3.205 ~ 3.606V 3.745 ~ 4.145V 4.282 ~ 4.682V Pin43 BSW2 0 1 0 1 KEY PRESSED Volume (1 K ohm) Volume + (2.2 K ohm) Program- (3.9 K ohm) Program+ (6.2 K ohm) MENU (9.1 Kohm) TV/DVD (13.8 Kohm) AV/TV(22 Kohm) Analog (37.4 Kohm) OK (86.5 K ohm) SELECTED BAND NOT USED VHF-L VHF-H UHF

KEYBOARD INPUT LEVEL (Pin56)

Note:The pull up resistor of Pin56 is 10K. TV/AV SELECTION (Pin11/Pin12) S0-Pin11 S1-Pin12 TV/AV MODE STD-BY (Pin 6) 0 1 0 0 TV 1 0 AV1/RGB 0 1 AV2 1 1 S-VHS

STANDBY OUTPUT (Pin6) Mode Standby Operating

2. STV2246H
The STV224XH is fully bus-controlled IC for TV that include PIF, SIF, Luma, Chroma and Deflection processing functions. Used with a vertical frame booster (TDA8174A for a 90 chassis, STV9306 for a 110 chassis), they allow multi-standard (BG/DK/I/MN/LL', PAL/SECAM/NTSC) sets to be designed with very few external components and no manual adjustments.

2.1 Main features
IC Bus Control PIF Circuit with PLL Demodulation (Positive and Negative Video) SIF Circuit with QSS Structure, FM Demodulation and AM Demodulation for France Intercarrier Capability and Built-in Sound Band pass Sound Subcarrier Output for Stereo Chassis (FM, NICAM) Integrated Chroma Filters and Luma Delay Line and Integrated Chroma Delay Line 3 channels input Video Switch and 2 channels CVBS output OSD RGB Inputs and external RGB Inputs Interface PAL/SECAM/NTSC Chroma Demodulators Black Stretch and peaking Circuit -5-

Automatic Cut-off Current Loop, manual Cut-off possible for low-cost applications Two Horizontal Deflection PLLs APR (Automatic RGB Peak Regulation) or RGB Peak Limitation Function

2.2 Pin description
PIN NO. 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 29 30 31 32 33 34 35 36 37 38 39 40 SYMBOL SIFIN1 SIFIN2 AGCSIFCAP VREFIF AGCPIFCAP PIFIN1 PININ2 TUNERAGCOUT IFPLL GNDIF AM/FMOUT/SC VCCIF INTCVBSOUT EXTAUDIOIN PIFLC1 PIFLC2 VCC2 CVBSIN1 GND2 CVBSIN2 BS Y/CVBSIN3 CHR APR BEXT/Cb GEXT/Y REXT/Cr FBEXT NC/CVBSOUT1 BOUT GOUT ROUT ICATH BOSD GOSD ROSD FBOSD/HC XTAL3/BTUN XTAL2 XTAL1 SIF input SIF input AGC SIF capacitor Voltage reference filter AGC PIF capacitor PIF input PIF input AGC Tuner output IF PLL filter IF Ground AM/FM Mono sound or stereo carriers output 5V IF Supply Internal CVBS output External audio input LC input LC input Video/LUMA Supply voltage (8V) Internal video input Video/LUMA ground External video input Black stretch capacitor Y(SVHS) or CVBS3 external input Chroma(SVHS) input Automatic RGB peak regulation External blue input or Cb input External green input or Y input External red input or Cr input External fast blanking input Not connected or CVBS output1 Blue output Green output Red output Cathode current measurement input OSD Blue input OSD Green input OSD Red input OSD Fast blanking input/half contrast 3.5x MHz Crystal or bell filter tuning capacitor 3.5x MHz Crystal 4.43/3.5x MHz Crystal -6DESCRIPTION

41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

CLPF X1/VAMP/CHROUT GND1 CVBSOUT2 VCC1 BCL/SAF VERT HOUT LFB/SSC SLPF SCL SDA VCCD GNDD AUDIOOUT FMCAP

Chroma PLL filter XTAL1 control pin, vertical amplitude DAC output and chroma reference signal output Chroma/scanning ground Second video switch output Chroma/scanning power supply (8V) Beam current limiter control voltage and safety input(X-ray) Vertical output pulse Horizontal output pulse Line flyback input and super-sandcastle output Scanning PLL filter I2C Bus clock input I2C Bus data input Digital supply voltage(5V) Digital ground Main audio output FM demodulation capacitor

2.3 Block diagram

3. TDA8174A
The TDA8174A are a monolithic integrated circuits It is a full performance and very efficient vertical deflection circuit intended for direct drive of a TV picture tube in Color and B & W television as well as in Monitor and Data displays -7-

3.1 Main features
Ramp generator Independent amplitude adjustement Buffer stage Power amplifier Flyback generator Thermal protection Internal reference voltage decoupling

3.2 Pin description

3.3 Block diagram

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. STV8216
This chip included three main parts: TV Sound Demodulator: provides all the necessary circuitry for the demodulation of audio transmissions of European and Asian terrestrial TV broadcasts. The various transmission standards are automatically detected and demodulated without user intervention. Audio Processor: based on DSP technology independently controls loudspeaker, subwoofer and headphone signals. It offers basic and advanced features, such as a ST Wide Surround, Equalizer, Automatic Loudness and Smart Volume Control for television viewer comfort. The STV8226/36 versions can perform additionally the SRS 3D Surround for stereo and mono signals. Audio Matrix: 3 stereo and 1 mono external analog audio inputs to loudspeakers and headphone, with 2 stereo external analog audio outputs (SCART compatible).

5.1 Main features
NICAM, AM, FM Mono and FM 2 carrier stereo demodulators for all sound carriers between 4.5 and 7MHz Mono input provided for optimum AM demodulation performances Demodulation controlled by automatic standard recognition system Sound IF AGC with wide range, over modulation and carrier offset recovery, Smart volume control, smart volume control, 5-band equalizer bass/treble control, automatic loudness control Loudspeaker and Headphone outputs with volume/balance controls and beeper Subwoofer output with volume control and programmable bandwidth, spatial Sound Effects (ST Wide Surround and Pseudo-Stereo), low-noise audio mutes and switches IC Bus-controlled, single and standard 27 MHz crystal oscillator, Power supplies: 3.3V Digital, 5V or 8V Analog, embedded 3.3V regulators

5.2 Pin description
Pin NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 SYMBOL SIF VTOP VREF IF VDDIF GNDIF MONOIN AO1L AO1R VDDC GNDC AI1L AI1R VMC1 VMC2 AI2L AI2R VDDA Pin TYPE Analog Analog Analog Analog power supply Analog power supply Analog Analog Analog Analog power supply Analog power supply Analog Analog Analog Analog Analog Analog Analog power supply DESCRIPTION Sound IF input ADC VTOP decoupling pin AGC Voltage reference decoupling Pin 3.3V Power supply for IF AGC & ADC Ground for IF AGC & ADC Mono Input Left SCART1 audio output Right SCART1 audio output 3.3V Power supply for audio DAC/ADC Ground for audio DAC/ADC Left SCART1 audio input Right SCART1 audio input Switched VREF decoupling Pin for audio converters (VMCP) VREF decoupling Pin for audio converters (VMC) Left SCART2 audio input Right SCART2 audio input 3.3 V power supply for audio buffers, matrix & bias -10-

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56

GNDAH AO2L AO2R VDDH VREFA AI3L AI3R BGAP LSL LSR SW HPL HPR GNDSA HPD ADR SCL SDA REG RESET SYSCK MCK VDD1 GND1 GNDSP XTI XTO VDDP GNDP GND2 VDD2 CKTST SDO ST/SDI WS SCK BUS1 BUS0 IRQ

Analog power supply Analog Analog Analog power supply Analog Analog Analog Analog Analog Analog Analog Analog Analog Analog power supply Bidirectional Input Open drain Open drain Analog Input Bidirectional Bidirectional Digital power supply Digital power supply Analog power supply Input Output Analog power supply Analog power supply Digital power supply Digital power supply Input Bidirectional Bidirectional Bidirectional Bidirectional Bidirectional Bidirectional Bidirectional

Ground for audio buffers and SCART Left SCART2 Audio output Right SCART2 Audio output 8V/5V power supply for SCART and audio buffers Voltage reference for audio buffers Left SCART3 audio input Right SCART3 audio input Bandgap voltage source decoupling Left loudspeaker output Right loudspeaker output Subwoofer output Left headphone output Right headphone output Substrate analog/digital shield Headphone detection input (active low) Hardware IC chip address control IC serial clock IC serial data 5V power regulator control Hardware reset (active low) System clock output IS master clock output 3.3V Power supply for digital core & IO cells Ground for digital core & IO cells Substrate analog/digital shield for clock-PLL Crystal oscillator Input Crystal oscillator output 3.3V power supply for analog PLL clock Ground for analog PLL clock Ground for digital core, DSPs & IO cells 3.3V power supply for digital core, DSPs & IO cells Must be connected to ground IS bus data output Stereo detection output / IS bus data input IS bus word select output IS bus clock output IC bus expander output1 IC bus expander output2 IC status read request

5.3 Block diagram

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CHASSIS BLOCK DIAGRAM

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SERVICE MODE&ADJUSTMENT
The Service-1 mode is entered by pressing the "SERVICE" key on remote control when the TV is in ON condition and not in any Menu mode. In service mode, by pressing "OK" key, Service-2 is accessed. by pressing "OK" key again, Serivice-3 is accessed. By pressing "PP" key, exit Service mode.

6.1 WHITE BALANCE ADJUSTMENT
The items within the Service-1 mode can be accessed using P+/P- keys and the selected item can be modified by using V+/V- keys. The parameters controlled in the Service-1 menu are : a) Red Gain ( 0 ... 63 ) b) DC Red ( 0 .... 127) c) Green Gain ( 0 .... 63) d) DC Green ( 0 .... 127) e) Blue Gain ( 0 .... 63) f) DC Blue ( 0 .... 127) g) APR_threshold (0....15) h) LOGO ( the first show the length of logo, and the followed is the logo) i) R-Cutoff (0...63) j) G-Cutoff (0...63) The display of Service-1 menu is showed as follows:

6.2 VIF ADJUSTMENT
When in Service-1 menu ,if "OK" key is pressed , Service-2 menu appears and the display is as follows.The parameters controlled in the Service-2 menu are : a) Tuner AGC ( 0 ... 63 ) b) Horizontal position 50 Hz( 0 ... 63) c) Vertical position 50 Hz (0...15) d) Vertical amplitude 50Hz (0...63) e) Vertical linearity 50Hz (0...63) f) Horizontal position 60 Hz( 0 ... 63) g) Vertical position 60 Hz (0...15) h) Vertical amplitude 60 Hz (0...63) i) Vertical linearity 60 Hz (0...63) j) Sub-Bright Maximum (0...63) k) Sub-Bright Minimum (0...63) l) Sub Tint (0...63) -13-

m) VCO Coarse ( 0 ... 15) n) VCO Fine ( 0 ... 127 ) o) VCO Coarse L1( 0 ... 15) p) VCO Fine L1( 0 ... 127 ) The display of Service-2 menu is showed as shown: The VCO status bar at the bottom of the screen appears only if either VCO Coarse item or VCO Fine item is selected. The VCO status is read from the Read register of STV223X/4X and guides whether to Increase / Decrease the VCO registers to attain VCO OK Status. For doing VCO adjustment , Feed a 38.9MHZ Carrier as IF input and adjust VCO Coarse and fine parameters to get VCO OK Status. If the cursor is in VCO Coarse or Fine, and the display shows VCO OK status, then pressing of AV" key will automatically put VCO fine to the Centre of the +60 to -60 KHz window. For doing VCO L1 adjustment ,Feed a 33.9 MHZ carrier as IF input and adjust VCO Coarse L1 and VCO Fine L1 to get VCO OK Status. If the cursor is in VCO Coarse L1 or Fine L1 , and the display shows VCO OK status, then pressing of "AV" key will automatically put VCO fine for L1 to the Centre of the +60 to -60 KHz window. Another fast way of adjustment of VCO is to put the selection bar to either VCO Coarse or fine and press the "AV" key. The VCO adjustment is done automatically. Similarly if you put the selection bar to VCO Coarse L1 or Fine L1 and press the "AV" key , the VCO L1 adjustment will be done automatically. NOTE:Below items are not used in this chassis: Vertical position 50 Hz Vertical amplitude 50Hz Vertical linearity 50Hz Vertical position 60 Hz Vertical amplitude 60 Hz Vertical linearity 60 Hz

6.4 DESIGN OPTION SETTING
When in Service-3 menu, if "OK" key is pressed, Option menu appears and the display is as follows:

OPTION1 b7 = Over modulation (0=Disable, 1=Enable, it's suggested to set it to 0 normally.) -14-

b5 = P/N/S crystals application (0=2 Crystals, 1= 1 Crystals, according the quantity of crystal used for color decoding in chassis.) b4 = Cutoff Loop (0= OFF, 1=ON, it's suggested to set it to 1 normally) b3 = Safety Reset (0=Active, 1=Non, it's suggested to set it to 0 normally) b2 = MONO IN (0 = OFF, 1= ON, Depend on the sound decoding solution used in chassis. ) b1 = Sound Demodulation (0 = Intercarrier/MONO, 1 =QSS/NICAM, depend on the sound decoding solution used in chassis.) b0 = logo display (0 =OFF, 1= ON, it's suggested to set it to 0 normally.) OPTION2 (set to 0 by default) b5 = HALF_CONTRAST (0 = OFF, 1=ON) b4 = Color 6dB (0 = OFF, 1 = ON) b3 = APR Feature (0 = ON, 1= OFF) b2 = Black Stretch (0 = ON, 1= OFF) b1 = Auto Flesh (0 = ON, 1= OFF) b0 = Coring (0 = ON, 1 = OFF) OPTION3 b7 =SMART (0 = OFF, 1=ON, it's suggested to set it to 1 normally) b5 = AVL (0 = OFF, 1=ON, it's suggested to set it to 0 normally.) b4 = PIF overmodulation (0 = OFF, 1= ON, it's suggested to set it to 0 normally.) b3 = Market_France --- secam LL (0 = OFF, 1 = ON, depend on the solution of chassis.) b2 = Manual/Auto cutoff (0 = Manual, 1 = Auto cutoff, depend on the CRT for chassis.) b1 = Mute pin low/high to control the mute of speaker (0 = low, 1 = high, depend on the solution of chassis.) OPTION4 b6 = WIDE MODE (0 = OFF, 1=ON, it's suggested to set it to 0 normally.) b4 = SCART2 (0 = OFF, 1=ON, depend on the solution of chassis.) b3 = RGB (0 = OFF, 1= ON, depend on the solution of chassis.) b2 = SVHS (0 = OFF, 1= ON, depend on the solution of chassis.) b1 = AV2 (0 = OFF, 1= ON, depend on the solution of chassis.) b0 = AV1 (0 = OFF, 1= ON, depend on the solution of chassis.) OPTION5 There are 8 bits used in OPTION 5. They are b0, b1, b2, b3, b4, b5, b6 and b7. For b0, normally, ST suggests to set it to 0. For b1, b2, they are used to select teletext languages. For b3, it's used to enable AV3 and SVHS. When b3 is set to 0, SVHS is enabled. When b3 is set to 1 in binary, the value is 8 in decimal. AV3 is enabled. For b4, b5, b6 and b7 of OPTION 5 are also used to set the brightness of background in teletext mode. When b4 b5 b6 and b7 are all set to 0, the brightness of teletext background is the same as brightness of TV background. When b4, b5, b6 and b7 are all set to 1, it's the maximum brightness of teletext background. It's the minimum brightness of teletext background when b4 is set to 1, and b5, b6 and b7 are all set to 0. you can set these 4 bits according to your favorite brightness of teletext background. A. for 11 OSD languages CPU ST92195C7B1/MNS for east Europe, the setting of the b1 and b2 is listed as below. 1. If b1 = b2 = 0, then the TEXT languages like "ENGLISH, FRENCH, SWEDISH, CZECH, GERMAN, PORTUGUESE (SPANISH), ITALIAN, RUMANIAN" can be decoded; 2. If b1=1, b2=0, then the TEXT languages like "ENGLISH, RUSSIAN (BULGARIAN), HUNGARIAN, TURKISH, GERMAN, PORTUGUESE (SPANISH), ITALIAN, RUMANIAN" can be decoded. -15-

3. If b1=0, b2=1, then the TEXT languages like "POLISH, RUSSIAN (BULGARIAN), SWEDISH, SLOVAK, GERMAN, SLOVENIAN, LITHUANIAN, RUMANIAN" can be decoded. 4. If b1 = b2 =1, then the TEXT languages like "POLISH, RUSSIAN (BULGARIAN), SWEDISH, CZECH, GERMAN, CROATIAN, LETTISH, RUMANIAN" can be decoded. B. for 12 OSD languages CPU ST92195C7B1/MNU and ST92195C7B1/MOK (SHRINK VERSION) for Western Europe, the setting of the b1 and b2 is as below. 1. If b1 = b2 = 0, then the TEXT languages like "ENGLISH, FRENCH, FINNISH, CZECH, GERMAN, PORTUGUESE (SPANISH), ITALIAN, GREEK" can be decoded; 2. If b1=1, b2=0, then the TEXT languages like "ENGLISH, FRENCH, DANISH, NORWEGIAN, GERMAN, PORTUGUESE (SPANISH), ITALIAN, GREEK" can be decoded. 3. If b1=0, b2=1, then the TEXT languages like "POLISH, FRENCH, SWEDISH, CZECH, HOLLAND, SERBIAN, ITALIAN, RUMANIAN" can be decoded. 4. If b1 = b2 =1, then the TEXT languages like "POLISH, FRENCH, SWEDISH, CZECH, GERMAN, PORTUGUESE (SPANISH), LETTISH, RUMANIAN" can be decoded. ST Text b0 is used to change the process for adjusting Auto gain. 1) When CPU ST92195C7B1/MOK is used, the b0 is suggested to set to 0, the gain table for shrink version should be selected. 2) When CPU ST92195C7B1/MNU is used, the b0 is suggested to set to 1, the gain table for normal version will be selected. b1, b2, b3 = select the correct process, only for ST engineer adjustment. ROM_M6_P_valid | OSDEPROM_M6_R_valid | ROM_M6_R_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*/ b4 = Color transition for SVHS of STV224XX (0 = b5 is available, 1 = b5 is not available, and "SHARPNESS" is no feature.) b5 = (0 = STV224XH, 1 = STV224XC/D/E). b6 = Tuner Drift Correction (0 = OFF, 1 = ON.) b7 = RGB/DVD display on screen (0 = RGB, 1 = DVD.) HPOS OSD, Adjust horizontal position of OSD. VPOS OSD, Adjust vertical position of OSD. HPOS TXT, Adjust horizontal position of teletext. VPOS TXT, Adjust vertical position of teletext. HOTEL MODE, To set HOTEL MODE ON or OFF. When HOTEL MODE is enabled. The end user can not make any adjustment of items in menu INSTALL, AUDIO and ORGANIZE. Menu INSTALL and AUDIO will disappear automatically. Volume Limit, To set maximum volume of HOTEL MODE. It's only available when HOTEL MODE is enabled. SndSt 1 b0, b1, b2, b3 of SndSt 1 are used to set the sound output level at pin 26 and pin 27 of STV8216 with RF signal. When b0, b1, b2, b3 of SndSt 1 are all set 0, the minimum sound output level will be got at pin 26 and -16-

pin 27 of STV8216 with RF signal. When b0, b1, b2, b3 of SndSt 1 are all set 1, it's 15 in decimal. The maximum sound output level will be got at pin 26 and pin 27 of STV8216 with RF signal. b4, b5, b6, b7 of SndSt 1 are used to set the "SURROUND" gain at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 0, the minimum "SURROUND" gain will be got at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 1, it's 240 in decimal. The maximum "SURROUND" gain will be got at pin 26 and pin 27 of STV8216 with RF signal. SndSt 2 b0, b2, b2, b3 of SndSt 2 are used to set the sound output level at pin 26 and pin 27 of STV8216 with AV signal. When b0, b2, b2, b3 of SndSt 1 are all set 0, the minimum sound output level will be got at pin 26 and pin 27 of STV8216 with AV signal. When b0, b2, b2, b3 of SndSt 1 are all set 1, it's 15 in decimal. The maximum sound output level will be got at pin 26 and pin 27 of STV8216 with AV signal. b4, b5, b6, b7 of SndSt 2 are used to set the "EQUALIZER" gain at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 0, the maximum "EQUALIZER" gain will be got at pin 26 and pin 27 of STV8216 with RF & AV signal. When b4, b5, b6, b7 of SndSt 1 are all set 1, it's 240 in decimal. The minimum "EQUALIZER" gain will be got at pin 26 and pin 27 of STV8216 with RF & AV signal. LL1 MAGC, Just for SECAM LL1 SIF AGC setting purpose in STV8216. No available for PAL and NTSC system. When the item "LL1 MAGC" is set to OFF, the SIF AGC of STV8216 is set by software. When the item "LL1 MAGC" is set to ON, the SIF AGC of STV8216 can be set manually. The following steps can be followed when set this item. 1) To get a RF SECAM LL1 signal without sound modulation, only sound carrier is available. And put the signal to input of tuner in CTV 5 chassis. 2) To press "SERVICE" key on remote control to enter service menu. And select the item "LL1 MAGC" by P+ or P- key on remote control. Set the item "LL1 MAGC" from "OFF" to "ON" by V+ or V- key on remote control. service command, 1) "PP"----exit 2) "OK"---- switch between the service menu 3) "AV"---- auto VCO adjust 4) "MUTE" ---- one line gain Enter service menu with user remote control, 1) Press key "Sleep" on remote control to set sleep time to "00:50". 2) Within 5 seconds, press local key "V+" in TV set to enter service menu. 3) Adjust expecting item as the same as service remote control.

-17-

TEST POINT WAVE FORM&SCHEMATIC DIAGRAM

-18-

-19-

-20-

-21-

-22-

ALTERNATIVE CRTS CRT BOARD XS402

T2S10 CHASSIS SCHEMATIC DIAGRAM
+5VA

20 21

V/I

18 19
V/O

16 17

FB/I

14 15
R/I

12 13 11
G/I

10 9

8

STATUS

6

AL/I

4 5 3

2
AL/O

AR/I

20 1
AR/O

V/I

18 19
V/O

16 17

FB/I

14 15
R/I

12 13 11
G/I

10 9

8

STATUS

6

AL/I

4 5 3

2
AL/O

AR/I

TP25 TP26

SCART

7

B/I

21

7

B/I

1

AR/O

XS401 SCART

+12V
IC701 CD7522CS STANDBY

TP27

1E/2W

VOLUME

1 INPUT

2 INPUT

2 OUT +

1 OUT +

2 OUT -

GND

GND

VCC

GND

R728 R114 470/s ZD101 3V9 R100 270/s
R105 100K

330P C415-C422

R509 100/s

R729

4.7K

Q105 2SA1015Y R141 9.1K R142 86.5K SW101 MENU SW102 SW103 V IN2 V2.2K SW104 V+ SW105 SW106 PP+ +5VA OK
R423 560

R419 68 R403 100K R401 10K R408 100K R404 100K R406 220 1uF 50V C409 R402 10K 1uF 50V R405 220 R407 100K

1uF 50V

C703
R711 C706 4.7E 0.1uF

C704

1uF 50V

Q401 2SC1815Y

L401 15uH

L404 15uH

L402 15uH

L403 15uH

1000uF25V

R409 68

L405 15uH

L408 15uH

L406 15uH

L407 15uH

C715

R507 47K/s
C705 0.1uF R712 1 1 4.7E

Q503 2SA1015Y R508 4K7 +8V

R412 10K

R410 100K

R415 100K C424

R417 220 1uF 50V C413

R413 10K 1uF 50V C423

R414 220

R416 100K

R411 100K

R SPK 1K2/0.5W R513 1K2/0.5W 1K2/0.5W R519 D501 R520 10K 680P 1N4007 D504 C511 R514 10K/s C517 680P 1N4007 R505 10K

SCART2 ID

SCART1 ID

CVBS OUT

+5VA D111 59080GW

D107 IN4148

C414

R156 1K

1

XS701

L SPK

R521 2K2/0.5W

R515 2K2/0.5W

R506 2K2/0.5W

V OUT

1uF 50V

C516

V IN1

+8V

AO1L

AOL2

AI2L

AI2R

GI

RI

C119 1uF 50V

R145 3K9

BI

R144

AO1R

AOR2

FBI

AI1R

AI1L

XS702

D508

1uF 50V

680P 1N4007

R115 4K7

R143

1K

C410 1uF 50V

C411

C412 1uF 50V

1/6W 510

R170

R169 1/6W IK

Q507 BF423

Q505 BF423

Q502 BF423

R168 10

R146 6K2 IC101 ST92195 IC103 HS0038B
2

C825 47uF 16V C826 0.1uF/s IC801 STV8216 C824 0.1uF/s

C821 C823 22P/s C822 22P/s X801 27MHz 0.1uF/s

C827 47uF 16V C820 0.47uF 50V R808 220K

+5V 2SA1015Y Q801

R806 56K R804 R805 100 100

R701 3.3K R705 22K R706 1.5K Q506 BF422 R518 330 Q504 BF422 R512 330/s Q501 BF422 R504 330/s 10K/2W C722 R522 C515 470pF/s 10K/2W R523
2

1

C127 0.1uF

1
+5VA

IR IN

KB INPUT

56
10K

3

R807 270K/s

D801

+8V

I R

R127

1N4148

C510 470pF/s R524 10K/2W
2

R501

56 2 REST IRQ NC 55
C103 47pF/s

55 BUS0

54 BUS1

53 SCK

SYSCK

VDD1

RESET

GNDSA

SKDST

GND1

MCK

ADR

REG

SCL

HPL

R516

R510

SDO

VDDP

GNDSP

ST/SDI

GNDP

XTO

SDA

HPD

HPR

VDD2

XTI

R502

WS

100

GND2

C709 R703

47uF 16V

R135 10K

R712 4E7

R110 10K

3

NC

VS OUT

54

R140 39K/s

MUTE

4

MUTE

STDBY LED

53 MONOIN GNDAH VREFIP VREPA VDDIF GNDIF VDDA GNDC VDDH VMC1 VMC2 BGAP VTOP VDCC AO1L AOIR AO2R AO2L AI1R AI2L AI2R AI3R AI1L AI3L
22K R704 4.7K C721

Q702 Q701 2SA1015Y R710 +15.2V

SW

SIF

ON/OFF

Q106 2SC1815Y R128

5

NC

STDBY LED

LSL

52
C116 39pF/s

LSR

0.01uF 2SC1815Y C710 1N4148 D701

4.7K

X101

6K8

6

ON/OFF

XTAL

51
4M C115 39pF/s

1
C803

2

3
C804 0.1uF/s

4

5
C805 L802 10uH 0.1uF/s

6

7

8

9

10

11

12
C808

13
C810

14
C809 C811

15

16
C813

17
C812 R803 330

18

19

20

21

22
10uF 16V

23
C816

24
0.22uF/s C818

25
C819

26

27

28

100

+8V

7
R155 SCART1 ID

DESIGN

XTAL

50
R129

220uF 16V

0.22uF/s +5V 10K/s C802 10n/s R802 22

0.1uF/s

0.1uF/s 1uF 50V 0.1uF/s C828 ADIO OUT C807 0.1uF/s 1uF 50V 10uF 16V 0.1uF/s 10uF 16V L802 10uH C814

C817 C815

0.1uF/s

10uF 16V XP502

8
6K8
R158

S_SW

VOL(N)

49
Q104

C806 10uF 16V

MUTE

AO1L

AO1R

AOR2

R134 12K
4 5 3 2 1

R111 12K/s

R130

+33V

SDA

SCL

SIF

2N3904

AI2R

AOL2

AIL1

AIR1

AI2L

SCART2 ID

6.8K

9

S1

VOL

48

47uF 16V XP201 +8V R G B ICA

10

S0

NC

47
R131 22K/s

+8V 33K FLYB CVBS OUT CVBS.TXT HD SDA SCL BCL C120 0.1uF/M R132 33K/s C121 0.1uF/M D254 VAMP ZD102 5V1 R FB VD HS VS G B TP22 TP23 +8V 47K/s 47K/s R269 R263 R261 R262 R274 1K/s 1K/s 1K/s TP24

AUDIO OUT

IC102 ST24C08 10K R109

11

S0(N)

SAW_SW2

46

R355 10K

1N4148

1N4148

D252 1N4148

R257 1K R255 8K2

12

S1(N)

NC

45

+5V L202 10uH R256 10K

IC301 TDA8174A

L252

D251

R276

1uH

R259 2K2

V AMP

VCC2

R266

R265

R264

0.1uF/M

GND

1K

BC

15K/s 2.2uF 50V

X201

BSW2

X202

14
+5VA B

NC

43

VT SAW2

10K R112 10K 1uF 50V

C257

27K/s

R268

C249 100uF 16V R252 100 R251 100

TP13

4.7uF 50V

4n7/s

C255

4n7/s

1

VP

R120

1K

1K

C259

Vout

R258

56K

2

3

4

5

6

7

8

9

10

VCC1

1K5

11

470uF 16V

4.43MHz

3.58MHz

C263

R253

R254 2K2

C228

C254

C256 0.1uF/s

C266 C129 0.1uF/s 0.1uF

C265 0.1uF

C264 0.1uF

15

B

BSW1

42
TP8

BSW2 BSW1 VS TP9 HS C113 0.01uF/s C124 R118 10 47uF 16V +5VA

TP12

R273 1K

R272 56

R271 56

R270 56

C248 0.1uF/s

R300 4K7 VAMP

C305 R304 150K 10uF 16v

C300 47n/M R333 8M2 1N4007 D301 R323 10K/S C325 100uF 35V

G

16

G

VSYNC HSYNC

41

56 FM CAP

PIFIC1 X1/VAMP/CHROUT

CVBS OUT1

XTAL3/BTUN

XTAL1

AUDIO OUT

BCL/SAF

XTAL2

GNDD

SDA

VCC1

GND1

FBOSD/HC

ICATH

VCCD

ROSD

BOUT

VERT

SLPF

BOSD

LFB/SSC

SCL

H OUT

GOSD

ROUT

GOUT

CJPF

NC

C127 0.01uF/s

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
BCL

R

17

R

40

AM/FM OUT/SC

EXT AUDIO IN

GEXT/YEXT

BEXT/UEXT

AGC(S)CAP

AGC(P)CAP

RAGC OUT

CVBS OUT

CVBS IN1

100pF/s SDA

IF GND

PIFLC2

SIF IN1

SIF IN2

PIF IN1

PIF IN2

IF VCC

VCC2

Vrefif

22pF/s

C126

2K7/s

2K7/s

R106

R107

R302 27/0.5W R330 R325 22K 330/2W

C326

SCL

+8V R288 6K8/s C284 1n/s R287 2K2/s 1 TP28 CVBS.TXT R138 1K5/s 22K R220 82PF/s R284 10K/s R290 2K2/s D282 1N4148 5

1

2

3
C205 50V/1uF

4

5

6

7

8

9

10
TP6

11

12

13

14

15
T201

16

17
C218 1uF 50V

18

19

20

21
C221 1uF 50V

22

23

24

25
C225 0.1uF

26
C226 0.1uF

27
C227 0.1uF

28

C302 220uF 16V R351 100K D351 1N4148 Q351 2SC1815Y R352 3K9

1000uF 35V

20

SCL

JTRET0 GND

37

C114 4n7/s

BS

STV2246/2248

Text

R119 5K6/s

CHR

PXFM

GND2

19

SDA

38

FBEXT

IC201

CVBS IN2

R137 820/s

REXT/VEXT

Y/CVBS IN3

FB

C100

18

FB

AVDD1

39

R303 150K +8V VD C324 0.1uF/M R327 2E2 R301 56

R329 3K3

R319 4K7

C306 220uF 35V

IF PLL

R318 1K8 C323 22uF 16V R324 82 R334 1/0.5W R320 1E5 TP21 C327 0.1uF/S

C206 1uF 50V

21
C106 220uF 16V 10uH L101 C108 0.1uF/s

VDD

36

TP10 R212 C209 0.33uF/s 150/s C211 1n/s C801 R213 120

C428

C427

+5VA

47P

47P

FBi Ri

22

JTDO

AGND

35
C112

TP11 +8V
L411

C224
L412

4 2
SAW

47P/s

R103 C117 0.22uF/M 5K6 220pF/s C104 R104

23

WSCF

TELETEXT

34
0.47uF 50V C111

3 C207 0.022uF/s

L209 1uH C219

1uF 50V

R224 330K/s

Gi Bi

SAW2

C213

6K8/s +5VA R102

C212

24

WSCR

WSS

33

Q282 2SC1815Y

SF202 K9650M C210 16V/10uF C201

C217 0.1uF R217 1K R218 1K

470uF 16V 47uF 16V L207 10uH SF203 5.5MHz

C425 C426 1uF 50V 1uF 50V R418 R238 75/s R237 75/s R236 75/s R153 75/s C352 1uF 50V R353 12K

2

R326 270/0.5W 0.22uF 250V M D302 RGP15J C311 C312 2.2uF 160V R312 1K/1W
1

FLYV

C269 15pF/s

C270 15pF/s

POWER

SAW_SW1

C268

13
6 7 8

NC

44

33K

V.SYNC IN

R133

100

0.01uF

2

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

C505 470pF/s

R702 4.7K

+5V

V-DY

25
10 C105 C140 0.1uF/s 47uF 16V

AVDD3

JTMS

32
R117 10 C141 0.01uF/s C110 47uF 16V +5VA

1

0.1uF

+8V Q202 2SC1815Y C111 0.1uF/s

4 5

R801 560/s

L801 10uH L201 10uH +5V

75/S R420 75/s FLYB

C333 220uF 35V

R311 10K/0.5W

H-DY L301 LX36 XS301

26

TEST0 MCFM

AVDD2

31

1n/s 2
SAW

3 C247 SF201 0.1uF/s TUNER AGC

R101

27
C102 4n7/s 5K6 C101 22pF/s

CVBS0

30
C109 R116 15K/s 2n2/s

SF204 6.5MHz Q203 2SC1815

C110 47uF 16V R221 75 R113 560 R223 470 V IN1 V IN2

K3959M SIF OUT V OUT

28

JTCK

+8V

TXCF

29
IF

D253 1N4148

C200 470pF D305 R328 680 XP305 4 C307 10uF 250V R321 180K/0.5W XP501

RGP15D/1N4937

ON/OFF

BSW2

BSW1

VT

TUNER AGC

IF

11 R281 100/s

TU201 ET-5K1E-EV100K

HD

IF1

TP20 1

4 3

1

R616 3.3K

TP7

+25V D635 RGP15D/1N4937 C317 470P 500V R316 E47/0.5W
Vin

1

10

IF2

+5V

R399 2.7 2W

T302 BSC25-4850

D603 1N4007 R602
5

C603 1n 1KV

C605 1n 1KV D605 1N4007 D606 1N4007 C607 100uF 400V C613 4n7/M R622 D614 1N4148 ES1/RGP10G

2 IC601 H11A817B/C
4 14

HV
3

HV

IC602
GND Vin

7805
Vout

TP1 C639 470uF 16V

+5VA

+15V Q683 B892

L201 10uH IC603 7808 C651 0.1uF 1K/0.5W R653
GND Vout

R620 120K/0.5W R621 120K/0.5W Q613 15K R624
2

R625 68/3W C616 680pF 2KV

2

C627 0.01uF

TP3

3E9/5W D604 1N4007 C604 1n 1KV RT601 MZ72 K9RM270 C606 1n 1KV

13

C632 680pF 500V C645 1000uF 25V C634 470pF/500V TP2

C653 47uF 16V

+8V C655 0.1uF/s

C215 47uF 16V

7 D304 RGP15J

5

8

VM
R307 1K R215 4K7/s 10uF 16V +125V R314 +25V C304 0.1uF/M 27K/s R216 15K

NetLabel5

ST1802HI
6 12

2

FOCUS FV

+12V C608 IC604 UPC574 1uF 50V

D617

68/3W R619 22 C614 0.1uF/M

BL
R633 15E/5W IC605 7805
GND Vout Vin

C242

D634 RU4YX
7 11 1

C635 1000uF 25V 12K/2W

C656 47uF 16V

5

+5V

5K6 R611

MTZ11C(11V)

+33V
R608
2

BH
C671 0.1uF/s

SGREEN SV
4 C310 47n/M 6 1

ZD601

1S1555

0.1uF/250VAC C602 T601A ET-LB-1604 C601 0.22uF/250VAC

D616

C631 470pF/1KV

R642 15K/s L600 GL100uH TP4

C243 10uF 16V

C654 470uF 16V

R626

2K7

Q611

BU +125V VT

R623

R617

2K7

3K3

Q612 2SC3807 22n/M C617

Q302 MD1803DFX Q301 2SC2383 TP17 C309 500V/2200P T301 JDT1924 TP18

TP19

10

100uF 160V

2SA1015Y XS603 R615 22K

C641

C615 15n/M

D631 RG2

R635 150K Q631 2SC1815Y VR631 R618 22K

C122 0.1uF/M

2 C360 22uF 160V
D618

AGC
1

C165 22uF 16V

2

9

C314 C313 10n 1K6V 470P 2KV

R309 10K

1H4148

2K

T3.15A

F601

T604

R634 0.22uF 50V 15K 1/6

D307 1N4148

R308 220 1/4W Title: T2S10 SCHEMATIC DIAGRAM Revision: 2007.06.10 Checked: Sheet: 1 of 1 1

XS602 SW601 KDC-A11

R629 12M/0.5W

R636 15K 1/6W

C685 ZD604 6V2

1

1. IS MARK OF CRITICAL COMPONENT 2.SUBJECT TO CHANGE WITHOUT NOTICE

D311 1N4007 +25V R306 +15V D310 1N4007 68/1W
1

Number: Date:

C629 2200PF 400VAC

Described:

Approved:

R526 22E

D503 5V6

C521 4700pF 2KV

1 OUT -

C506 100uF16V

CRT