FILE NO. SM-CTV-O-100
COLOR TELEVISION
SERVICE MANUAL
MODEL NO. 14C13/14C27
CHASSIS NO. EX-1A4
Please read this manual carefully before service
Page 1: ...FILE NO SM CTV O 100 COLOR TELEVISION SERVICE MANUAL MODEL NO 14C13 14C27 CHASSIS NO EX 1A4 Please read this manual carefully before service...
Page 2: ...NTS 4 CIRCUIT ADJUSTMENTS 7 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 12 STRUCTURE BLOCK DIAGRAM 12 BLOCK DIAGRAM FOR SUPPLY VOLTAGE SYSTEM 13 CHASSIS DESCRIPTION 14 SERVICE DATA 15 TECHNICAL DATA OF...
Page 3: ...age 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...
Page 4: ...mponents 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 Before replacing an...
Page 5: ...racteristics MAINTENANCE 1 Install the TV set on a stable and level surface 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...
Page 6: ...set 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 brightnes...
Page 7: ...enter of the screen 2 1 4 Turn both tabs at the same time keeping the angle constant to superimpose red and blue horizontal on the center of the screen 2 1 5 Adjust two tabs of the 6 pole magnet to su...
Page 8: ...n better convergence in circumference 2 2 5 Fix the deflection yoke position and put the third wedge in either upper space Fasten the deflection yoke assembly on the picture tube 2 2 6 Detach the temp...
Page 9: ...voltage to the rated voltage 2 1 Make sure that the supply voltage is within the range of the rated value 2 2 Connect a digital voltmeter to the B voltage output terminal of the TV set Power on the TV...
Page 10: ...me to 0 Then press and hold the MUTE button on the remote control and press the MENU button on the TV to enter the SERVICE mode In this case the S mode cannot be stored in the EEPROM To exit from the...
Page 11: ...rightness delay time YDFN 07 NTSC brightness delay time YDFS 0F SECAM brightness delay time YDAV 0F AV brightness delay time TOP 18 UOC AGC VOL 21 UOC audio output amplitude IFFS 03 02 PIF 02 38 9MHz...
Page 12: ...cription Default 0 OP_HOTEL HOTEL mode 1 1 OP_236 100 236 programs preset 0 2 OP_NTSC NTSC option set 1 3 OP_AV2 Two set of AV terminals 1 With AV2 0 Without AV2 1 4 OP_SVHS S Video terminal 1 5 OP_DV...
Page 13: ...M Sound system M option set 1 0 OP_TUNER Tuner 1 Philips Tuner 0 Panasonic Tuner 0 1 OP_AUTO_LANG0 1 2 OP_AUTO_LANG1 0 3 OP_AUTO_LANG2 Auto language option set English Farsi Arabic Russian French Germ...
Page 14: ...6J Audio Amp lifier TDA7056B H OUT FBT T402 Power Supply Circuit STR F6654 or STR G5653 3 3V 5V 1 16V SOUND 115V CRT Audio Video Input Output Band 1 2 Vt AGC From Antenna IIC BUS R L Speaker 150 250V...
Page 15: ...N401 8V 5V 2 To A100 VD891 115V To N600B VD881 15V H VD871 16 S 5V 1 To H Out EEPROM R C Input 3 3V To N100 Keyboard Switch Transformer T804 Power Regulation and Control Circuit STR G5653 F6654 Bridge...
Page 16: ...reliability and advanced functions with fewer external components which provide much convenience for manufacturing and technical service 2 The EX 1A4 chassis series mainly use the following ICs and as...
Page 17: ...they are mounted in S DIP envelope with 64 pins The features are given in the following feature list The differences between the various ICs are given in the table on page 4 2 Features TV signal proc...
Page 18: ...coder with embedded Controller TDA935X 6X 8X PS N2 series Controller 80C51 controller core standard instruction set and timing 1 s machine cycle 16 128Kx8 bit late programmed ROM 3 12Kx8 bit DATA RAM...
Page 19: ...Soft colours using CLUT with 4096 colour palette Globally selectable scan lines per row 9 10 13 16 and character matrix 12x10 12x13 12x16 VxH Fringing Shadow selectable from N S E W direction Fringe...
Page 20: ...SERVICE MANUAL 18 3 Block Diagram Fig 6 Block Diagram for TDA935 6 8 PS N2 with Mono Intercarrier Sound Demodulator...
Page 21: ...SERVICE MANUAL 19 Fig 7 Block Diagram for TDA935 6 8 PS N2 with QSS IF Sound Channel...
Page 22: ...L EWD 1 20 Automatic Volume Levelling East West drive output VDRB 21 vertical drive B output VDRA 22 vertical drive A output IFIN1 23 IF input 1 IFIN2 24 IF input 2 IREF 25 reference current input VSC...
Page 23: ...demodulator QSS IF amplifier and East West output or not and on some software control bits The valid combinations are given in table 2 2 The vertical guard function can be controlled via pin 49 or pin...
Page 24: ...SERVICE MANUAL 22 Fig 8 Pin Configuration SDIP 64...
Page 25: ...nected to an independent input output Y0 and Y1 and the other side connected to a common input output Z With E LOW one of the two switches is selected low impedance ON state by Sn With E HIGH all swit...
Page 26: ...tate the more positive voltage L LOW state the less positive voltage X STATE is immaterial Fig 21 Schematic Diagram One Switch Fig 11 Ratings Limiting values in accordance with the Absolute Maximum Sy...
Page 27: ...nal ground VC 5 DC volume control OUT 6 Positive output GND2 7 Power ground OUT 8 Negative output n c 9 Not connected Fig 13 Pin Configuration 2 General Description The TDA7056B is a mono Bridge Tied...
Page 28: ...mode 2 General Description The TDA8356 is a power circuit for use in 90 and 110 colour deflection systems for field frequencies of 50 to 120 Hz The circuit provides a DC driven vertical deflection ou...
Page 29: ...n 1 0dbsteps for balancefacility independent mute function All function are programmable via Serial bus 2 descripion The tda7449 is a volume tone bass and treble Balance left right processor for quali...
Page 30: ...SERVICE MANUAL 28 4 Pin Connection Fig 18 5 Electrical Characteristics...
Page 31: ...VS 9V RL 10K RG 600 all controls flat G 0dB unless otherwise specified NOTE1 1 The device is functionally good at Vs 5V a step down on Vs to 4V does t reset the device 2 BASS and TREBLE response The c...
Page 32: ...on Two wire serial interface bus I2 C Bus compatible Filtered inputs for noise suppression with Schmitt trigger Clock frequency up to 400 kHz High programming flexibility Internal programming voltage...
Page 33: ...units Cycle by cycle current limiting under voltage lockout with hysteresis over voltage protection and thermal shutdown protects the power supply during the normal overload and fault conditions Low c...
Page 34: ...F6654 Pin No Symbol Function Description 1 OCP FB Over current protection detection signal voltage limiting signal input 2 S MOSFET source 3 D MOSFET drain 4 VIN Supply voltage input for control circ...
Page 35: ...SERVICE MANUAL 33 3 WAVEFORMS OF KEY POINTS NI00 Pin58 NI00 Pin33 NI00 Pin34 NI00 Pin44 NI00 Pin22 NI00 Pin21 BU250 8DX B BSC60H HEAT...
Page 36: ...SERVICE MANUAL 34 Notes The waveforms are only for reference The waveforms may differ dependent on different models BCT 4 Pin4 N100 P40...
Page 37: ...053BP N402 s Pins Digital Multimeter Victor DT890D Pin No Function description Reference Voltage V Positive Resistance K Nerative Resistance K 1 Signal input 3 0 22 2 47 0 2 Signal input 3 9 22 2 47 0...
Page 38: ...L 3 4 6 8 6 8 3 P1 7 SDA 3 0 6 8 6 8 4 P2 0 TPWM 1 8 36 2 17 9 5 P3 0 ADC0 PWM0 0 1 11 8 12 3 6 P3 1 ADC1 PWM1 0 1 5 0 5 0 7 P3 2 ADC2 PWM2 0 02 13 5 13 5 8 P3 3 ADC3 PWM3 0 7 10 7 9 3 9 VSSC P 0 0 0...
Page 39: ...BS Y 3 3 27 5 21 2 43 CHROMA 1 4 26 8 20 9 44 AUDOUT AMOUT 1 3 3 27 5 21 5 45 INSSW2 1 6 1 0 1 0 46 R2 VIN 2 6 28 0 21 7 47 G2 YIN 2 6 28 0 21 7 48 B2 UIN 2 6 28 0 21 7 49 BCLIN 2 5 27 6 20 8 50 BLKIN...
Page 40: ...teristics Components which have these special safety characteristics in this manual and its supplements are identified by the international hazard symbols or UL FCC FDA or VDE marking on the circuit d...
Page 41: ...CIRCUIT DIAGRAM FOR 14C13 14C27...
