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- Content  .........................................................................................................................  2

- Bill of Materials .............................................................................................................  3

- Safety Precautions .......................................................................................................  7

- TV Block Diagram .........................................................................................................  8

- Replacement Of Memory IC ......................................................................................... 10

- Service Adjustment ...................................................................................................... 10

- ICs Functional Description .......................................................................................... 18

- Test point Waveforms .................................................................................................. 22

- Purity / Convergence Adjustment ............................................................................... 23

- Explore View Diagram .................................................................................................. 25

 
 

Содержание 21CTU93BC

Страница 1: ...21CTU93BC CRT COLOR TV SET ...

Страница 2: ...SERVICE MANUAL This manual is the latest at the time of printing and does not include the modification which may be made after the printing by the constant improvement of product AKAI 21CTU93BC ...

Страница 3: ... of Materials 3 Safety Precautions 7 TV Block Diagram 8 Replacement Of Memory IC 10 Service Adjustment 10 ICs Functional Description 18 Test point Waveforms 22 Purity Convergence Adjustment 23 Explore View Diagram 25 ...

Страница 4: ...6W 150KΩ J 2 R605 R700 41 RT 1 6W 15KΩ J 3 R725 R609 R610 R553 R558 R565 R566 R573 R713 R730 R803 R805 R816 R818 R820 R822 43 RT 1 6W 2 7KΩ J 1 R705 44 RT 1 6W 220KΩ J 2 R407 R226 45 RT 1 6W 220Ω J 6 R101 R309 R806 R913 R923 R933 46 RT 1 6W 22KΩ J 2 R706 R221 47 RT 1 6W 27KΩ J 2 R402 R701 48 RT 1 6W 3 3KΩ J 3 R613 R703 R704 49 RT 1 6W 3 9KΩ J 1 R704 50 RT 1 6W 330Ω J 3 R916A R926 R936 51 RT 1 6W 3...

Страница 5: ...109 CD110 50V 1UF M 5 C218 C611 C605 C810 C811 110 CD110 50V 4 7UF M 1 C561 111 CD288H 250V 10UF M 1 C402 112 CD293 400V 150UF M 1 C507 113 CD71 50V 10µF M 1 C312 114 BSC25 0226Q 1 T401 115 RI 1 2W 12MΩ K 1 R514 116 HS EW04 60 1 V303 117 HS PH01 50 1 V451 118 HS PW01 50 1 N502 119 HS VS02 70 1 N301 120 HS WS03 40 1 N601 121 5Q0765RF 1 N502 122 AT24C08 ATMEL24C08 1 N701 123 PC817B LTV 817 817B 1 N5...

Страница 6: ...2200PF K 1 C454 177 CBB81 1 6KV 8200pF K 1 C456 178 CBB81 1 6KV 9100PF K 1 C455 179 CL21X 63V 0 15uF K 1 C207 180 KDC A04 001S 1 181 8D 11 1 R502 182 MZ73 9Ω 3脚 1 RT501 183 2 0 X 3 5MM 9 L441 短孔T501 4 T401 3 184 2 3 X 3 5MM 2 C507 2 185 TR 3 10 with pad 3 V303 N601 2 186 TR 3 10 without pad 3 N301 N502 V451 187 KFC A06 P5 6 SW1 SW2 SW3 SW4 SW5 SW6 188 2SA1015 Y 3 V563 V601 V803 189 2SC1674 1 V101 ...

Страница 7: ...NO 4 F22 22R0 031000 JLF 148 ET24 2 L501 L502 5 YDD UF16 JLF 98 UF16 1 L501 6 10MM 2 W509 W510 7 CBB23A 250VAC 0 1µF M 1 C501 8 CBB23A 250VAC 0 1µF M 1 C512 9 CBB23A 250VAC 0 22µF M 2 C501 C502 JUMPERS POLYPROPYLENE CAPACITOR ...

Страница 8: ...check high voltage by drawing an arc Use a high voltage meter or a high voltage probe with a VTVM Discharge the picture tube before attempting meter connection 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 8 When service is required observe the original lead dress Extra precaution should be given to assure corre...

Страница 9: ...R MA IN R MAOUTL RGB OUT V OUT H OUT Vo V2i AR i1 R G B ARi 2 ALi 2 ALi2 ALi1 24C08 POWER UNIT 130V 24V 13V 8V 5V 3 3V CRT PCB V IN TDA8177 V OUT H IN H OUT H OUT DY 200V SCREEN FOCUS TDA11105 XXXX Vi1 OUT1 OUT1 Vi2 OUT2 OUT2 AN17821 CRT ALo ARo C ALi 1 4052 audio audio audio video video bus video Video IN video 8V 13V ...

Страница 10: ... 9 ...

Страница 11: ...raw factory mode 5 The TEST will be displayed on the screen 6 Check the setting value of the SYSTEM default value of Table below If the value is different select items by CH CH keys and set value by VOL VOL keys 7 Press STANDBY key again and return to the normal screen SERVICE ADJUSTMENT B1 POWER SUPPLY 1 Receive normal colour bar signal 2 Connect DC voltmeter to VD541 and isolated ground 3 Adjust...

Страница 12: ... center correspond to CRT horizontal center Receive NTSC signal and repeat above M0 and M1 adjustment M2 Menu AGC Adjustment Receive 60dBμ 1mV VH colour bar pattern signal adjust AGC value voltage from high to low to noise reduce gradually and just disappeared point Select shipping push V V key to be shipped M3 Menu CRTcut off and white balance adjustment Receive white signal a CRT cut off adjustm...

Страница 13: ...djustment 30 0 H PAR 63 32 Picture parallelogram adjustment 31 0 H BLK SW ON OFF Horizontal blank switch ON M1 TV DVD CL 0 15 Contrast level offset 13 BLOC 0 15 Black level offset course 6 R BIA 0 63 R OUT Amplitude Adjustment 32 G BIA 0 63 32 G OUT Amplitude Adjustment 32 6 B BIA 0 63 B OUT Amplitude Adjustment 32 R DRV 0 63 R OUT Amplitude Adjustment 32 G DRV 0 63 G OUT Amplitude Adjustment 32 B...

Страница 14: ...ive peaks 2 TCI2X 0 1 Top sync clamp current of the CVBS Y input clamp 0 clamp current about 80 uA 1 clamp current about 160 uA 0 BKS ON OFF Baack stretch ON BSD 0 1 Black stretch Depth 0 15IRE 1 30 IRE 0 AAS 0 3 Black area to switch off the black stretch 0 PWL 0 1 Peak white limiting 0 peak white limiting circuit not active 1 peak white limiting circuit active SOC 0 1 Soft clip adjust 0 PWLDAC 0 ...

Страница 15: ...t is 2 mA 0 FSPS 0 1 Selection of left or right hand side in split Screen mode 0 FSPB 0 1 Blanking in split screen mode 0 FSPE 0 1 Enable split screen mode for demonstration of features 0 HCO 0 1 EHT tracking mode 0 OSVE 0 1 Black current measuring lines in overscan for vertical zoom setting 1 0 EVB 0 1 Extended vertical blanking 0 IFS RED 0 1 IF Intelligent degree 1 PWM VOL ON OFF OFF M6 CLF 0 1 ...

Страница 16: ...ff 0 DTR 0 1 Chroma trap mode 0 single chroma trap 1 dual chroma trap more suppression but less bandwidth 0 Y P 0 15 Y delay adjustment for PAL signal 8 Y N 0 15 Y delay adjustment for NTSC signal 8 Y AV 0 15 Y delay adjustment for PAL signal in AV mode 8 Y SVHS 0 15 Y delay adjustment for PAL signal in S video mode 8 PF P 0 3 PAL Center frequency with postpone adjust 0 PF N 0 3 NTSC Center freque...

Страница 17: ...ON SIF PRI ON OFF Force sound system as auto search ON POWER REST 0 3 AC power on start selection 1 BANLANCE ON OFF AV stereo selection ON AV STEREO OFF MONO OFF HALFTONE ON OFF Half tone select OFF MENU BG ON OFF Menu background selection OFF IR OPT SANYO NEC Remote control selection SANYO KEY OPT SANYO MEK KEY BOARD selection SANYO CURTAIN 0 2 CURTAIN selection 2 LOGO ON OFF Logo selection OFF T...

Страница 18: ...keys The LOGO perpendicular position adjust 1 adjusts upward 2 get down adjustment Press 3 4 keys The LOGO level position adjust 3 is to the left adjustment 4 rightwards adjusts Press 5 6 keys The color choice of the LOGO character list 5 regulate the first color 6 regulate the second color Press 7 8 keys The LOGO character list size adjust 7 regulate the first size 8 regulate the second size Pres...

Страница 19: ... Automatic volume leveling EAST WEST drive output DECBG 17 Band gap decoupling SECPLL 18 SECAM PLL decoupling GND1 19 Ground 1 for TV processor PH1LF 20 Phase 1 filter PH2LF 21 Phase 2 filter VP1 22 1st supply voltage TV processor 5V DECDIG 23 decoupling digital supply of TV processor XTALOUT 24 crystal oscillator output XTALIN 25 crystal oscillator input IR 26 Remote control signal input MUTE 27 ...

Страница 20: ...stle output LSR 58 Audio output R LSL 59 Audio output L C2 C3 C4 AIN5R 60 S VIDEO C IN AIN3 IN1R 61 R AUDIO IN CVBS2 Y2 62 AV2 VIDEO IN AIN2 1INL 63 L AUDIO IN CVBS Y4 AIN5L 64 AV1 VIDEO IN TDA7266SA WIDE SUPPLY VOLTAGE RANGE 3 5 18V MINIMUM EXTERNAL COMPONENTS NO SWR CAPACITOR NO BOOTSTRAP NO BOUCHEROT CELLS INTERNALLY FIXED GAIN STAND BY MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD P...

Страница 21: ... t c n u J e c n a t s i s e R l a m r e h T Rth j amb W C 8 4 t n e i b m a n o i t c n u J e c n a t s i s e R l a m r e h T ELECTRICAL CHARACTERISTCS VCC 11V RL 8Ω f 1KHz Tamb 25 C unless otherwise specified t i n U x a M p y T n i M n o i t i d n o C t s e T r e t e m a r a P l o b m y S VCC V 8 1 1 1 3 e g n a R y l p p u S Iq A m 5 6 0 5 t n e r r u C t n e c s e i u Q l a t o T VOS V m 0 2 ...

Страница 22: ...uency 0 010 0 1 1 10 k 0 2 k 0 1 k 1 0 0 1 THD Vcc 11 V Rl 8 o hm Pou t 100m W Pou t 2W fr eque nc y Hz 5 000 4 000 3 000 2 000 1 000 0 0 1 0000 2 0000 3 0000 4 0000 5 0000 10 100 1k 10k 100k Level dB r Vcc 11V Rl 8 ohm Pout 1W frequency Hz Mute Attenuation vs Vpin 8 Quiescent Current vs Supply Voltage 1 1 5 2 2 5 3 3 5 4 4 5 5 0 10 10 20 30 40 50 60 70 80 90 100 Attenuation dB Vpin 6 V 3 4 5 6 7 ...

Страница 23: ...Test point Waveforms TDA8177 ST9302 LA78040 or LA78041 PIN 1 2 3 4 5 6 7 V 0 7 15 12 15 0 3 15 9 0 07 V451 C 5Vpp 0 9Vpp 1000Vpp 1 3Vpp H H 1Vpp V H H CRT KB CRT KG CRT KR 95Vpp 95Vpp 95Vpp H H H T511 PIN7 HEATER 300Vpp 22Vpp H H V451 B 2 7Vpp TDA11105 PIN45 2 5Vpp 2 5Vpp 3 8Vpp H H H TDA11105 PIN44 TDA11105 PIN46 TDA11105 PIN56 TDA11105 PIN57 0 8Vpp V TDA11105 PIN14 TDA11105 PIN15 TDA11105 PIN24 ...

Страница 24: ... the center of the screen Fig 3 8 Move the deflection yoke forward and fix the position of the deflection yoke so that the whole screen will become green 9 Insert the wedge to the top side of the deflection yoke so that it will not move 10 Imput a crosshatch signal 11 Verify that the screen is horizontal 12 Input red and blue raster signals and make sure that purity is properly adjusted CRT WEDGE ...

Страница 25: ...t convergence DYNAMIC CONVERGENCE ADJUSTMENT 1 Move the deflection yoke up and down and overlap lines in the periphery Fig 2 2 Move the deflection yoke left to right and overlap the lines in the periphery Fig 3 3 Repeat 1 and 2 above and make the best convergence After adjustment fix the wedge at the original position Fasten the retainer screw of the deflection yoke Fix the 6 magnets with glue FRO...

Страница 26: ...21CTU93BC ...

Страница 27: ...AKAI 21CTU91BC AKAI 21CTU93BC AKAI 21CTU94BC ...

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