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Model No: CT-21FDS1
Version 1.0

CONTENT

GERAL DESCRIPTION.......................................................................................................................... 4

SAFETY INSTRUCTION ....................................................................................................................... 6

CIRCUIT ADJUSTMENT....................................................................................................................... 7

FAULT FINDING TREES, DIAGRAMS & OVERVIEWS ................................................................. 14

VARIOUS PARAMETERS OF INTEGRATED CIRCUIT .................................................................. 22

ELECTRICAL PART LIST ................................................................................................................... 30

CIRCUIT DIAGRAM ............................................................................................................................ 40

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Содержание CT-21FDS1

Страница 1: ...C C Co o ol l lo o ou u ur r r T T TV V V S S Se e er r rv v vi i ic c ce e e M M Ma a an n nu u ua a al l l...

Страница 2: ...2 Model No CT 21FDS1 Version 1 0 M M Mo o od d de e el l l G G Gr r ro o ou u up p p C C CT T T 2 2 21 1 1F F FD D DS S S1 1 1 CHASSIS A21T01 TB1238 MODEL CT 21FDS1...

Страница 3: ...FDS1 Version 1 0 CONTENT GERAL DESCRIPTION 4 SAFETY INSTRUCTION 6 CIRCUIT ADJUSTMENT 7 FAULT FINDING TREES DIAGRAMS OVERVIEWS 14 VARIOUS PARAMETERS OF INTEGRATED CIRCUIT 22 ELECTRICAL PART LIST 30 CIR...

Страница 4: ...l of the world Figure 1 shows the block diagram of AKTP01 A21T01 Table 1 provides A21T01 mainly ICs and functions Figure 2 shows the whole set power supply system for AKTP01 A21T01 Figure 3 shows the...

Страница 5: ...SMALL SIGNAL PROCESSOR IF VIDEO CK HROMA DEF N201 TB1238AN AV1 AV2 switching N203 CD4053BE TV AV switching N252 CD4053BE SOUND SYSTEM SWITCH N202 CD4052BE 8 8 L R 4 15 2 2 L OUT R OUT V OUT 14 L IN1...

Страница 6: ...gh voltage cap Discharge the anode of the CRT and the chassis in case of electric shock c Wear a pair of goggles when handling the CRT to avoid broken pieces damaging your eyes d Do not hold the CRT n...

Страница 7: ...al degaussing after moving the receiver is normally unnecessary providing the receiver is properly degaussed upon installation The degaussing coil operates for about 1 second after the power to the re...

Страница 8: ...multi meter Preparation Before Adj The set is turned on Connect the TV SG to RF input terminal of the set Adjustment procedure 1 Turn RP551 potentiometer to adjust B to specified voltage 2 Check volta...

Страница 9: ...is from TV or from AV input signal stereo should be observed on the oscilloscope Item General adjustment AKTP01 chassis Measuring Equipment SG No 1 and No 2 service remote controller and user remote c...

Страница 10: ...gain To be fine H line V line Magnified drawing of part Item White balance adjustment AKTP01 chassis Measuring Equipment SG and white balance meter No 1 service remote controller Preparation before Ad...

Страница 11: ...Brightness contrast and color should be set in standard Adjustment procedure 1 Receive the 5 circles pattern signal that is 50HZ vertical frequency 2 Press V LINE V SIZE V CENT and H CENT key on NO 2...

Страница 12: ...e the Philips pattern signal 2 Press PIC key on user remote controller to call the menu as adjusting picture quality Adjust color brightness contrast sharpness and tint in NTSC respectively and all ad...

Страница 13: ...V572 V511 Check VD556 C563 Recover W560 unplug XZ411 for a While then test the voltage of C563 Check V411 T402 T401 Deflection coil Check L414 VD403 C411 Deflection coil Voltage of C507 Check if V501...

Страница 14: ...red pole negative in ohm scope on the circuit board ground then touch softly the test point with another pole black pole in ohm scope meanwhile observe the reactivity on the output device Note In the...

Страница 15: ...snow noise wave disturbance on the CRT via using Signal input way by touching pin 35 of N201 Check V251 V212 V231 N201 Observe if snow noise wave disturbance on the CRT via using signal input way by t...

Страница 16: ...Hear if there is the voice liking Ka Ka in the loudspeaker via using Signal input way by touching pin4 15of N252 Hear if there is the voice liking Ka Ka in the loudspeaker via using Signal input way...

Страница 17: ...checking horizontal and vertical deflection circuit s failure we have better to use an oscilloscope Abnormal Normal Normal Abnormal 24V 0V Abnormal Normal The waveform on the pin 24 of N201 Measuring...

Страница 18: ...not move in the horizontal orientation the failure should be in the horizontal deflection circuit We mainly check the open circuit fault in horizontal deflection circuit The detail checking and repair...

Страница 19: ...cuit around pin57 of N204 is called auto reset circuit If UOC detects errors in resetting it will come to the state of programme protected The detail checking and repairing steps are as follow 4 98V 4...

Страница 20: ...of reasons are that the horizontal and vertical flyback pulse signals do not come to UOC We can judge this failure by measuring the wave of the character in an oscilloscope The detail checking and rep...

Страница 21: ...T R output 2 4 19 G OUT G output 2 4 20 B OUT B output 2 5 21 ABCL Automatic brightness contrast control 5 4 22 V RAMP Vertical Ramp generator capacitor connect pin 4 4 23 V NFB V NFB input 5 24 V OUT...

Страница 22: ...ng RC filter network for phase loop circuit 4 8 49 VCO GND Ground IF VCO circuit 0 50 VCO Voltage control oscillating coil connecting pin 8 51 VCO Voltage control oscillating coil connecting pin 8 52...

Страница 23: ...OWER ON OFF 18 P61 SIF3 SIF Output3 19 P62 RF GAIN RF GAIN ON OFF 20 P63 50 60 50 60Hz Output 21 VSS VSS GND connection 22 P64 R OSD R signal output 23 P65 G OSD G signal output 24 P66 B OSD B signal...

Страница 24: ...CTL Tone control 6 RF Ripple filter 7 GND Ground 8 OUT Sound output 9 Vcc2 Power supply 2 C Pin functions of N101 LA7910 Pin Symbol Function 1 OUT1 Decoder output 1 2 OUT2 Decoder output 2 3 BD1 Band...

Страница 25: ...OL The pin for controlling the black offset level 7 S ID FILTER The pin for connecting the SECAM identification filter capactitor 8 EXT R Y IN The input pin for external R Y signal 9 5V Vcc The Vcc pi...

Страница 26: ...8 21 ST3 Sub sharp center 3 58NTSC TV 25 22 SV3 Sub sharp center 3 58NTSC AV 25 23 ST4 Sub sharp center OTHER TV 25 24 SV4 Sub sharp center OTHER AV 25 25 SHPX Sub sharpness max difference 35 26 SHPN...

Страница 27: ...alance 72 3 BCUT Blue Dark Balance 7D 4 GDRV Green light Balance 3B 5 BDRV Blue light Balance 3E 6 CNTX Sub Contrast Max 3F 7 BRTC Sub bright Centre 48 8 COLC Sub Color Center NTSC 40 9 TNTC Sub Tint...

Страница 28: ...ZE ZOOM WIDE V 00 42 SBY SECAM B Y Black 08 43 SRY SECAM R Y Black 08 44 RAGC RF AGC 25 45 AFT PIF VCO center 40 46 HAFC AFC gain 00 47 V25 Volume 25 37 48 V50 Volume 50 5D 49 BRTS Sub bright differen...

Страница 29: ...bon resistor RT13 1 6W 100 5 R201 D10B101J T Carbon resistor RT13 1 6W 100 5 R207 D10B101J T Carbon resistor RT13 1 6W 100 5 R210 D10B101J T Carbon resistor RT13 1 6W 100 5 R216 D10B101J T Carbon resi...

Страница 30: ...603 D10B102J T Carbon resistor RT13 1 6W 1K 5 R613 D10B102J T Carbon resistor RT13 1 6W 1K 5 R623 D10B102J T Carbon resistor RT13 1 6W 1K 5 R635 D10B102J T Carbon resistor RT13 1 6W 1K 5 R703 D10B102J...

Страница 31: ...6W 8 2K 5 R110 D10B103J T Carbon resistor RT13 1 6W 10K 5 R116 D10B103J T Carbon resistor RT13 1 6W 10K 5 R117 D10B103J T Carbon resistor RT13 1 6W 10K 5 R258 D10B103J T Carbon resistor RT13 1 6W 10K...

Страница 32: ...B104J T Carbon resistor RT13 1 6W 100K 5 R254 D10B104J T Carbon resistor RT13 1 6W 100K 5 R259 D10B104J T Carbon resistor RT13 1 6W 100K 5 R989 D10B104J T Carbon resistor RT13 1 6W 100K 5 R443 D10B124...

Страница 33: ...1 06A CH 50 63V 15pF J C925 C2CF150J T Ceramic capacitor CC1 06A CH 50 63V 15pF J C926 C2CF150J T Ceramic capacitor CC1 06A CH 50 63V 15pF J C115 C2CF180J T Ceramic capacitor CC1 06A CH 50 63V 18pF J...

Страница 34: ...0pF K C503 C2BW102K O Ceramic capacitor CT81 08C 2R 1KV 1000pF K C504 C2BW102K O Ceramic capacitor CT81 08C 2R 1KV 1000pF K C505 C2BW102K O Ceramic capacitor CT81 08C 2R 1KV 1000pF K C506 C2BW102K O C...

Страница 35: ...E20E102M Electrolytic Capacitor CD110 35V 1000uF M C565 E20E102M Electrolytic Capacitor CD110 35V 1000uF M C700 E20E102M Electrolytic Capacitor CD110 35V 1000uF M C212 E20FR22M T Electrolytic Capacito...

Страница 36: ...4 F20G104K T Mylar capacitor CL11 100V 0 1uF K C514 F20G104K T Mylar capacitor CL11 100V 0 1uF K C412 F20J394J Polypropylene capacitor CBB21 200V 0 39uF 5 C415 F20Z822J Polypropylene capacitor CBB81 1...

Страница 37: ...DZ0010XX T Diode RD8 2EB3 HZ9A2 N101 IXXX0020 IC LA7910 N251 IXXX0024 IC TA1275AZ N202 IXXX0026 IC CD4052BE N904 IXXX0080 IC upc574J CW574 N201 IXXX0023 IC TB1238AN D901 IXXX0106 IC 87CM38N 3GN5 2B46...

Страница 38: ...n 2SC945 2SC1815 2SC536E V251 RXC945XX T Audion 2SC945 2SC1815 2SC536E V411 RXD2499X Audion 2SD2499 2SD1651 V901 RXD400XX T Audion 2SD400D Z238 FC0004XX TRAP FILTER X4 5B Z235 FC0006XX TRAP FILTER X6...

Страница 39: ...39 Model No CT 21FDS1 Version 1 0 CIRCUIT DIAGRAM...

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