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SERVICE MANUAL

14

2. CHASSIS DESCRIPTION

2.1

General Description

ETE-2 chassis is applied in PF21GB300 series.
By use of philips UOC for TV small signal processing and bus control, the chassis
enables TV tuning, adjustment, control and picture correction, featuring high-integration,
high-performance-to-price ratio and high-reliability and compact circuit with fewer external
components. The chassis, widely used in small and medium TVs, provides much more
convenience for manufacturing and technical service. It includes:

UOC TDA9384PS/N3/3 for PAL/NTSC /SECAM s m a l l signal processing and bus control

EEPROM AT24C08 for data memory

TDA4863AJ for vertical output power amplifying

TFA9842AJ for audio power amplifying

Thick-film IC STR-G5653 for power circuit adjustment and control

2.2 The following features are available in the chassis:

Color systems: PAL, NTSC,SECAM

Sound systems: D/K, B/G, I ,M

236 programs preset

AV stereo

I

2

C bus control Electronic

program table

Intelligent lock

Biorhythm

2.3 The chassis mainly uses the following ICs and assemblies.

Table 5 Key ICs and Assemblies

Serial

Type Description

Position

No.

1 N200

AT24C08

EERPOM

TDA9384PS/N3/3(slim crt) (Small signal pro

2 N100

TDA9381PS/N3/3 etc.

micro control unit (MCU))

3

N601

TFA9842AJ

Audio power amplifier

4

N300

TDA4863AJ/TDA4864AJ

Vertical scan output stage circuit
Switch-mode power supply

5 N801

STR-G5653

control

6 A001

TAF5-C4I21

/TAF5-E4I22

Tuner

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Содержание TV-2104

Страница 1: ...COLOR TELEVISION SERVICE MANUAL MODEL NO CHASSIS NO ETE 2 Please read this manual carefully before service TV 2104 TV 2105 TV 2174 ...

Страница 2: ...N 1 SAFETY PRECAUTION 1 PRODUCT SAFETY NOTICE 2 SAFETY SYMBOL DESCRIPTION 3 MAINTENANCE 3 ADJUSTMENTS 4 SET UP ADJUSTMENTS 4 CIRCUIT ADJUSTMENTS 7 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 13 STRUCTURE BLOCK DIAGRAM 13 CHASSIS DESCRIPTION 14 SERVICE DATA 15 APPENDIX CIRCUIT DIAGRAM ...

Страница 3: ...TICE below 4 Service and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT anode So ensure that the maximum EHT voltage does not exceed the rated value after service and adjustment SAFETY PRECAUTION WARNING REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY 1 The TV has a nominal working EHT voltage Extreme caution should be exercised when working on the TV with the...

Страница 4: ...These characteristics are often passed unnoticed by a visual inspection and the X ray radiation protection afforded by them cannot necessarily 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 the international hazard symbols on the circuit diagram and parts list ...

Страница 5: ...onents identified by the VDE marking have special safety related characteristics MAINTENANCE 1 Place the TV set on a stable stand or base that is of adequate size and strength to prevent it from being accidentally tipped over pushed off or pulled off Do not place the set near or over a radiator or heat register or where it is exposed to direct sunlight 2 Do not install the TV set in a place expose...

Страница 6: ...et 1 3 Operate the TV for at least 15 minutes 1 4 Degauss the TV set using a specific degaussing coil 1 5 Set the brightness and contrast to maximum 1 6 Counter clockwise rotate the R B low brightness potentiometers to the end and rotate the green low brightness potentiometer to center 1 7 Receive green raster pattern signals 1 8 Loosen the clamp screw holding the deflection yoke assembly and slid...

Страница 7: ...5 Adjust two tabs of the 6 pole magnet to superimpose red blue line and green line 2 1 6 Remember red and blue movement Repeat steps 2 1 3 2 1 5 until optimal convergence is obtained 2 2 Circumference convergence adjustment 2 2 1 Loosen the clamp screw holding the deflection yoke assembly and allow it tilting 2 2 2 Temporarily put the first wedge between the picture tube and deflection yoke assemb...

Страница 8: ...o get optimal convergence Tighten the lamp screw holding the deflection yoke assembly 3 White Balance Adjustment Generally white balance adjustment is made with professional equipment It s not practical to get good white balance only through manual adjustment For TVs with I2C bus control change the bus data to adjust white balance Incline the Yoke Up or Down Incline the Yoke Right or Left Circumfe...

Страница 9: ...eat the above steps until the TV is degaussed completely 2 Confirmation and Adjustment for Voltage Caution B voltage has close relation to high voltage To prevent X ray radiation set B voltage to the rated value 2 1 Make sure that the supply voltage is within the range of the rated value 2 2 Connect a digital voltmeter to the voltage output terminal of the main PCB Power on the TV and set the brig...

Страница 10: ...oving the back cover look for the FBT on the main PCB There should be a FCB on the FBT 4 2 Power on the TV and preheat it for 15 min 4 3 Receive a normal TV signal Rotate knob of the FCB until you get a sharp picture Before Adjusting After Adjusting Fig 4 5 Safety Inspection 5 1 Inspection for insulation and voltage resistant Perform safety test for all naked metal of the TV Supply high voltage of...

Страница 11: ...3 4 UOC system surveillance display IFP1 00 IF PRESET VALUE1 IFP2 00 IF PRESET VALUE2 TINT 20 BASE BAND TINT CONTROL TWBK 88 TIME OF WIDE BLANKING PWL 15 Peak white limted OIF 20 Off set if demodulatour 5HP 6HP adjustable HOR PARALLELOGRAM CORRECTION 5HB 6HB adjustable HOR BOW CORRECTION 5HSH 6HSH adjustable HORIZONTAL SHIFT 5HZD 6HZD 0A DVD HORIZONTAL SHIFT 5EWW 6EWW adjustable E W WIDTH 5EWP 6EW...

Страница 12: ... bright set SBRI 24 Sub bright MBRI 30 Max bright SCON 20 Sub contrast MCON 39 Max contrast SCOL 32 Sub color OP1 AF Optional 1 OP2 02 Optional 2 OP3 09 Optional 3 OP4 00 Optional 4 OP5 00 Optional 5 OP6 F6 Optional 6 OP7 60 Optional 7 OP8 18 Optional 8 OP9 07 Optional 9 INIT EEPROM init VG2 VG2 VSD VSD Table4 Optional Setup BIT NAME DESCRIPTION DATA 0 OP_HOTEL Hotel model 1 yes 0 no 1 1 OP_236 Ch...

Страница 13: ... 1 HUNGARIAN OSD 0 NO HUNGARIAN OSD 1 0 OP_UKRAIN 1 UKRAIN OSD 0 NO UKRAIN OSD 1 1 OP_ARABIC 1 ARABIC OSD 0 NO ARABIC OSD 1 2 OP_FARSI 1 FARSI OSD 0 NO FARSI OSD 1 3 0 4 0 5 OP_RFTOAV 1 SCART 0 RCA 0 6 OP_TDA1517 1 TDA1517 0 TFA9842AJ 0 OP5 7 OP_FAKE_AVL 0 AVL 1 fake AVL 0 0 OP_AV_ON 1 AV shutdown AV restart 0 TV restart 1 1 OP_DIRECT_SWITCH 1 memory restart 0 power on and standby 1 2 OP_HCO EHT t...

Страница 14: ...WINDOW OF SOUND PLL 200KHZ 1 3 OP_FMWS1 WINDOW OF SOUND PLL 600KHZ 0 4 OP_OSVE Overscan vertical 1 yes 0 no 0 5 OP_FFI 0 6 OP_SPEED1 Program quickly 1 yes 0 no 0 OP9 7 OP_SPEED0 Program slowly 1 yes 0 no 0 Notes The data sheet may differ dependent on different models The data sheet may differ dependent on different CRTs for the same model ...

Страница 15: ...SERVICE MANUAL 13 STRUCTURE AND CHISSIS FUNCTION DESCRIPTION 1 STRUCTUE BLOCK DIAGRAM Fig 4 Structure Block Diagram for ETE 2 Chassis Series ...

Страница 16: ...8 for data memory TDA4863AJ for vertical output power amplifying TFA9842AJ for audio power amplifying Thick film IC STR G5653 for power circuit adjustment and control 2 2 The following features are available in the chassis Color systems PAL NTSC SECAM Sound systems D K B G I M 236 programs preset AV stereo I 2C bus control Electronic program table Intelligent lock Biorhythm 2 3 The chassis mainly ...

Страница 17: ...inance trap circuit Integrated luminance delay line with adjustable delay time Picture improvement features with peaking with switchable centre frequency depeaking variable positive negative overshoot ratio and video dependent coring and blue and black stretching All features are available for CVBS Y C and YPBPR signals Tint control for external RGB YPBPR signals Integrated chroma band pass filter...

Страница 18: ...internal CVBS and an external CVBS or Y C signal Controller 80C51 controller core standard instruction set and timing 1 s machine cycle 32 128Kx8 bit late programmed ROM 3 12Kx8 bit Auxiliary RAM shared with Display Interrupt controller for individual enable disable with two level priority Two 16 bit Timer Counter registers One 16 bit Timer with 8 bit P re scaler WatchDog timer Auxiliary RAM page ...

Страница 19: ... Field and Vertical Blanking Interval VBI data capture of WST data Display Teletext and Enhanced OSD modes Features of level 1 5 WST and US Close Caption Serial and Parallel Display Attributes Single Double Quadruple Width and Height for characters Scrolling of display region Variable flash rate controlled by software Enhanced display features including overlining underlining and italics Soft colo...

Страница 20: ...RGB inputs peak to peak value 0 7 V V iY p p luminance input signal peak to peak value 1 4 1 0 V V iU p p V iPB p p U PB input signal peak to peak value 1 33 0 7 V V iV p p V iPR p p V PR input signal peak to peak value 1 05 0 7 V Output signals V o IFVO p p demodulated CVBS output peak to peak value 2 0 V V o QSSO rms sound IF intercarrier output in QSS versions RMS value 100 mV V o AMOUT rms dem...

Страница 21: ...le 7 SYMBOL PIN DESCRIPTION P3 1 ADC1 PWM1 6 port 3 1 or ADC1 input or PWM1 output P3 2 ADC2 PWM2 7 port 3 2 or ADC2 input or PWM2 output P3 3 ADC3 PWM3 8 port 3 3 or ADC3 input or PWM3 output VSSC P 9 digital ground for Controller core and periphery ...

Страница 22: ...XT 2 35 QSS intercarrier output AM output external audio input EHTO 36 EHT overvoltage protection input PLLIF 37 IF PLL loop filter IFVO SVO DVBO 2 38 IF video output selected CVBS output DVB output QFP 80 VP1 39 main supply voltage TV processor CVBS1 40 internal CVBS input GND 41 ground for TV processor CVBS3 Y 42 CVBS3 Y input C 43 chroma input AUDOUT AMOUT 2 44 audio output AM audio output volu...

Страница 23: ...TFA9841 J have a mode select Mode on pin 7 The TFA9842AJ contains a unique protection circuit that is solely based on multiple temperature measurements inside the chip This gives maximum output power for all supply voltages and load conditions with no unnecessary audio holes Almost any supply voltage and load impedance combination can be made as long as thermal boundary conditions number of channe...

Страница 24: ...SERVICE MANUAL 2 3 Block diagram of TFA9842AJ Fig 6 2 4 Pinning Fig 7 22 ...

Страница 25: ...SERVICE MANUAL 2 5 Pin description Table 8 23 ...

Страница 26: ...tly adjustable to optimize power consumption and flyback time For the TDA4863AJ or TA4864AJ the flyback supply voltage will be generated internally by doubling the supply voltage and therefore a separate flyback supply voltage is not needed 3 3 Block diagram of TDA4863AJ and TDA4864AJ Fig 7 3 4 pinning Table 9 TDA4863AJ SYMBOL DESCRIPTION TDA4864AJ 1 positive supply voltage 1 VP1 2 flyback generat...

Страница 27: ...tended Temperature Devices Available 8 lead PDIP 8 lead JEDEC SOIC 8 lead MAP and 8 lead TSSOP Package 2 wire Serial EEPROM Table 10 AT24C01A 1K 128 x 8 AT24C02 2K 256 x 8 AT24C04 4K 512 x 8 AT24C08 8K 1024 x 8 AT24C16 6K 2048 x 8 4 2Description The AT24C01A 02 04 08 1 6 provides 1024 2048 4096 8192 16384 bits of serial electrically erasable and programmable read only memory EEPROM organized as 12...

Страница 28: ... discussed in detail under the Device Addressing section The AT24C04 uses the A2 and A1 inputs for hard wire addressing and a total of four 4K devices may be addressed on a single bus system The A0 pin is a no connect The AT24C08 only uses the A2 input for hardwire addressing and a total of two 8K devices may be addressed on a single bus system The A0 and A1 pins are no connects The AT24C16 does n...

Страница 29: ...ach the 1K requires a 7 bit data word address for random word addressing AT24C02 2K SERIAL EEPROM Internally organized with 32 pages of 8 bytes each the 2K requires an 8 bit data word address for random word addressing AT24C04 4K SERIAL EEPROM Internally organized with 32 pages of 16 bytes each the 4K requires a 9 bit data word address for random word addressing AT24C08 8K SERIAL EEPROM Internally...

Страница 30: ...ip on Chip technology with the same operation principle as STR G5600 Pin configuration function and threshold of STR G8600 are compatible with those of STR G5600 5 2 Block Diagram 5 3 Function of Terminal Table 15 Function of Terminal Terminal Fig 11 No Symbols Description Functions 1 D Drain Terminal MOS FET drain 2 S Source Terminal MOS FET source 3 GND Ground Terminal Ground 4 VIN Power supply ...

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