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akira CT-21XF9 Service Manual

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Summary of Contents for akira CT-21XF9

  • Page 2 CHASSIS: CN-9EA MODEL: CT-21XF9A Model No: CT-21XF9A Version 1.0...

  • Page 3: Table Of Contents

    CONTENT Specifications ..................4 General description ................5 Safety instructions ................11 Circuit adjustments ....…............ 12 Set-up adjustment ................13 Service mode general instructions ............15 Service mode adjustment ..............19 Main repairing flow diagram .............. 20 Main ICs description and repair data offering ........26 Spare parts list .………………………………………………………..

  • Page 4: Specifications

    SPECIFICATIONS RF system: Color system: PAIA.43, NTSC3.58, NTSC4.43, PAL-M, PAL-N Sound system: D/K, I, M, B/G Video system: PAL4.43, NTSC4.43, NTSC3.58, PAL-M, PAL-N (50/60Hz) Receiving channel: VHF: Cl~C12 (49.75 ~ 85.25MHz, 168.25 ~ 216.25MHz) UHF: C 13~C57 (471.25 ~ 863.25MHz) CATV: Zl~Z7 (111.0 ~ 167.0MHz) Z8~Z35 (223.0~447.0MHz) Programs Preset:...

  • Page 5: General Description

    GENERAL DESCRIPTION Figure 1 shows the block diagram of CN-9 (21BM32). Table 1 provides CN-9EA chassis main ICs and functions. Figure 2 shows the whole set power supply system for CN-9EA chassis. Figure 3 shows the system control circuit of CN-9EA chassis. Table 1: 21BS32EA mainly ICs and functions Location Type...

  • Page 11: Safety Instructions

    SAFETY INSTRUCTION WARNING: BEFORE EXAMINING AND SERVICING THIS CHASSIS, READ CAREFULLY THE FOLLOWING SAFETY INSTRUCTIONS. X-RAY RADIATION PRECAUTION 1. The EHT must be checked every time the receiver is serviced to ensure that the CRT does not emit X-ray radiation as result of excessive EHT voltage. The nominal EHT for this receiver is 27.5kv at zero beam current (minimum brightness) operating at AC 220V.

  • Page 12: Circuit Adjustments

    CIRCUIT ADJUSTMENTS GENERAL INFORMATIONS All adjustment are thoroughly checked and corrected when the receiver leaves the factory. Therefore the receiver should operate normally and produce proper colour and B/W pictures upon installation. However, several minor adjustments may be required depending on the particular location in which the receiver is operated.

  • Page 13: Set-Up Adjustment

    FOCUS ADJUSTMENT 1. Use the remote control to set the contrast to maximum and the brightness, chroma to medium. 2. Set H. V. lines near Philips picture center to thinnest with the focus adjustment potentiometer on the FBT. After finishing adjustment, ensure that no poor focusing exist near the center or around of the frame.

  • Page 15: Service Mode General Instructions

    CONVERGENCE ADJUSTMENTS NOTE: Before a attempting any convergence adjustments, the receiver should be operated for at least fifteen minutes. CENTRE CONVERGENCE ADJUSTMENT 1. Receive the pane pattern test signal. 2. Set the brightness and contrast for well-defined pattern. 3. Adjust two tabs of the 4-Pole Magnets to change the angle between them (See figure 7) and superimpose red and blue vertical lines in the centre area of the picture screen.
  • Page 17 Table 2 The BUS DATA FOR 21BM32 Number Adjustment Item Adjustment Function Type Data BCUT Blue Dark Balance RCUT Red Dark Balance GCUT Green Dark Balance MODE Factory data Option OSD position LANG TB1238AN V/C/D mode data UHF-H Factory ASM VT limit of UHF high byte UHF-L Factory ASM VT limit of UHF LOW byte VHFH-H...
  • Page 18 Number Adjustment Item Adjustment Function Type Data Horizontal centering difference of 50/60Hz Vertical line of 50 Hz VP50 Vertical centering of 50Hz HPOS Horizontal center of 50 Hz V/C/D mode data 1 V/C/D data 0 RGCN Text RGB contrast min TXCX Text RGB contrast max SHPN...

  • Page 19: Service Mode Adjustment

    3. ADJUSTMENT THE DATA Pressing of the YELLOW or BLUE button on remote control transmitter will change the value of data, in the range from 00 to FF. The variable range depends on the adjusting item. 4. EXIT FROM SERVICE MODE Use the keyboard on remote control transmitter or TV set to turn off the TV once.

  • Page 20: Main Repairing Flow Diagram

    5. VERTICAL AMPLITUDE ADJUSTMENT Enter the TV to the service mode, and receive pane test signals. Select the HIT item by pressing the item adjustment button on the remote transmitter, and adjust vertical amplitude by pressing the data, adjustment button so that vertical amplitude lacks a little. Continue to adjust vertical amplitude by pressing the data adjustment button until the first bar on pane signal touches edge of screen.

  • Page 26: Main Ics Description And Repair Data Offering

    MAIN ICS DESCRIPTION AND REPAIR DATA OFFERING 1. INTRODUCTION FOR IC TB1238AN (N201) TB1238AN is a PAL/NTSC system color TV specific monolithic IC currently developed by Toshiba Co., which is controlled by Inter IC Bus. TB1238AN includes a picture IF processing circuit, a sound IF processing circuit, PLL video detection circuit, PLL sound frequency discrimination circuit, a luminance signal processing circuit, PAL/NTSC chroma signal processing circuit and RGB signal processing circuit.
  • Page 28 Table 3 Pin functions and repair data of TB1238AN Index type multimeter (r=20k ) Resistance for GND 'Quiescent Dynamic (RxlK) Symbol Function state state Red pen Black measure measure DE-EMP Audio deemphasis capacitor connect pin AUDIO OUT Audio signal output IF VCC +9V supply input for IF amplify circuit...
  • Page 29 Horizontal deflection supply input H VCC 18.3 (+9V) SECAM identification/CW SID/CW OUT 11.2 signal output FBP IN Horizontal flyback pulse input SYNC OUT SYNC pulse output H VCC Horizontal excitation output DEF GND Ground (detection circuit) FBP IN Sandcastle pulse output VIDEO OUT Video signal output DIG.
  • Page 30 2. INTRODUCTION FOR CPU IC TMP87CM38N-3673 (N001) The pin functions and repair data of TMP87CM38N-3673 is listed in the table 4. Table 4 Pin functions and repair data of TMP87CM38N-3673 Index type multimeter (r=20k ) Resistance for GND Symbol Function Quiescent Dynamic (RxlK)
  • Page 31 Horizontal flyback for Vertical sync pulse for 14.8 OSD character OSC1 23.8 oscillator pin 1 OSD character OSC2 oscillator pin 2 TEST Test pin I0MHZ clock 24.3 oscillation input 10MHZ clock XOUT 24.3 oscillation output RESET CPU reset pin OPTION Option pin 14.5 Remote control...
  • Page 32 Repair data for IC TDA7057AQ(N601) TDA7057AQ is the audio power amplifier OF CN-9, the pin functions and repair data of it is listed in the table 5. Table 5 Pin functions and repair data of TDA7057AQ Index type multimeter (r=20k ) Resistance for GND Symbol Function...
  • Page 33 5. Repair data for IC TA8403(N401) TA8403 is the vertical output power amplifier IC of CN-9, the pin functions and repair data of it is listed in the table 7. Table 7 Pin functions and repair data of TA8403 Index type multimeter (r=20k ) Resistance for GND Symbol Function...
  • Page 34 7. Introduction for IC TA1275Z TA1275Z is the SECAM demodulation IC, which accomplishes a multicolor system with TB1231 series. This IC requires very few external parts. Features • Working with TB1231 series, which is PAL/NTSC PIF/VIF/VIDEO/CHROMA/DEF processor. • Built-in FM demodulator with PLL circuit for color demodulation mad SECOM identification. •...
  • Page 35 Digital multimeter (GDM8145) Resistance for GND (Rx200KÙ) Symbol Function Quiescent Dynamic Black state (V) state (V) Red pen measure measure B-Y OUT The output pin for demodu- lated B-Y signal. Standard output level is 0.56Vp-p. 2.44 2.61 B-Y processor has a LPF to eliminate, the carrier components.
  • Page 36 Digital multimeter (GDM8145) Resistance for GND (Rx200KÙ) Symbol Function Quiescent Dynamic Black state (V) state (V) Red pen measure measure C IN The chroma signal input pin. Apply composite signal through 100pF of coupling capacitor. Standard input signal level is 1Vp-p. 2.90 2.76 The bell monitor switch for...
  • Page 37 Digital multimeter (GDM8145) Resistance for GND (Rx200KÙ) Symbol Function Quiescent Dynamic Black state (V) state (V) Red pen measure measure ID SW The switch pin for selecting the ID detection mode. H+V : connected to Vc-c 5.02 2.50 18.3 18.3 Auto seaeh : opened H : connected to GND SECAM ID...
  • Page 39 8. Introduction for ic TDA7449 The TDA7449 is a volume tone (bass and treble) balance (left/right) processor for quality audio application in TV system. Control of all the functions is accomplished by serial bus. The pin functions and repair data of TDA7449 is listed in the table 10. The inner structure block diagram of TDA7449 is show as figure 8.
  • Page 41 9. Repair data for IC SAA5261 The SAA5261 is a teletext signal processor. The pin functions and repair data of TDA7449 is listed in the table 11 Table 11 Pin functions and repair data of SAA5261 Digital multimeter (GDM8145) Resistance for GND (R x 200KÙ) Symbol Quiescent...
  • Page 42 Digital multimeter (GDM8145) Resistance for GND (R x 200KÙ) Symbol Quiescent Dynamic Black state (V) state (V) Red pen measure measure XTAL 0.39 0.66 37.24 13.93 XTAL 0.01 0.37 41.81 13.93 RESET 0.01 0.01 14.47 VDDS 0.01 0.01 18.63 10.02 POWER-UP 0.02 0.01...

  • Page 46: Spare Parts List

    SPARE PARTS LIST OF 21BS32EA Main-board/AV-boa rd/K-board Location No. Part No. Name Type R112 51113470JU0 carbon film resistor RT13-0.166W-47 ohm J R112 51153470JUY carbon film resistor NAS 1/6470J R307 51113470JU0 carbon film resistor RT13-0.166W-47 ohm J R307 51153470JUY carbon film resistor NAS1/6470J R116 51113560JU0...
  • Page 47 Location No. Part No. Name Type R042 51153391JUY carbon film resistor NAS1/6391J R217 51113561JU0 carbon film resistor RT13 -0.166W-560 ohm J R217 51153561JUY carbon film resistor NAS1/6561J R 114 51113681JU0 carbon film resistor RT13 -0.166W-680 ohm J R114 51153681JUY carbon film resistor NAS1/6681J R226 51113471JU0...
  • Page 48 Location No. Part No. Name Type R050 51113102J20 carbon film resistor RT13-0.166W-1K ohm J R050 51153102J2Y carbon film resistor NAS1/6102J R104 51113682JU0 carbon film resistor RT13-0.166W-6.SK ohm J R104 51113682JUY carbon film resistor NAS1/6682J R010 51113472JU0 carbon film resistor RT13-0.166W-4.7K ohm J R010 51153472JUY carbon film resistor...
  • Page 49 Location No. Part No. Name Type R607A 51153473JUY carbon film resistor NAS1/6473J R027 51113333JU0 carbon film resistor RT13-0.166W-33K ohm J R027 51153333JUY carbon film resistor NAS1/6333J R048 51113333JU0 carbon film resistor RT13-0.166W-33K ohm J R048 51153333JUY carbon film resistor NAS1/6333J R203 51113333JU0 carbon film resistor...
  • Page 50 Location No. Part No. Name Type R053 51124331JU0 carbon film resistor RT14-0.25W-3301 ohm J R053 5115433 IJUY carbon film resistor NAS1/4331J R055 51124331JU0 carbon film resistor RT14-0.25W-3301 ohm J R055 51154331JUY carbon film resistor NAS1/4331J R059 51124471JU0 carbon film resistor RT14-0.25W-4701 ohm J R059 51154471JUY...
  • Page 51 Location No. Part No. Name Type R102 51154103JUY carbon film resistor NAS1/4103J R511 51124103JU0 carbon film resistor RT14-0.25W-10K ohm J R511 51154103JUY carbon film resistor NAS1/4103J R515 51124103JU0 carbon film resistor RT14-0.25W- 10K ohm J R515 51154103JUY carbon film resistor NASl/4103J R521 51124103JU0...
  • Page 52 Location No. Part No. Name Type R108 51124184JU0 carbon film resistor RT14-0.25W- 180K ohm J R108 51154184JUY carbon film resistor NAS1/4184J R520 51124224JU0 carbon film resistor RT14-0.25W-220K ohm J R520 51154224JUY carbon film resistor NAS1/4224J R505 51135102J50 carbon film resistor RT15-0.5W- 1K ohm J R898 51124221JU0...
  • Page 53 Location No. Part No. Name Type R024 51153103JUY carbon film resistor NAS1/6103J R099 51113103JU0 carbon film resistor RT13-0.166W-10K ohm J R099 51153103JUY carbon film resistor NAS1/6103J R606 51113103JU0 carbon film resistor RT13-0.166W-10K ohm J R606 51153103JUY carbon film resistor NAS1/6103J R603 51113153JU0 carbon film resistor...
  • Page 54 Location No. Part No. Name Type R701 51113622J20 carbon film resistor RT13-0.166W-6.2K ohm J R701 51113622J26 carbon film resistor NAS1/6622J R702 51113103J20 carbon film resistor RT3-0.166W-10K ohm J R702 51113103J26 carbon film resistor NAS1/6103J R893 51731513J20 glass glaze film resistor RI40-2W-51K ohm J R893A 51731513J20...
  • Page 55 Location No. Part No. Name Type C211 5251C 120JV0 ceramic capacitor CC1-63V-06a-C-12PFJ CC01 5251C 180JV0 ceramic capacitor CC1-63V-06a-C- 18PFJ C111 5251C300JV0 ceramic capacitor CC1-63V-06a-C-30PFJ C018 5251C300JV0 ceramic capacitor CC1-63V-06a-C-30PFJ C019 5251C300JV0 ceramic capacitor CC1-63V-06a-C-30PFJ C114 5251C470JV0 ceramic capacitor CC1-63V-06a-C-47PFJ C246 5251C470JV0 ceramic capacitor CC1-63V-06a-C-47PFJ...
  • Page 56 Location No. Part No. Name Type C225 5253F103ZV0 ceramic capacitor CT1-63V-08a-2F4 -10nFZ C233 5253F103ZV0 ceramic capacitor CT1-63V-08a-2F4 -10nFZ C242 5253F103ZV0 ceramic capacitor CT1-63V-08a-2F4 -10nFZ C248 5253F103ZV0 ceramic capacitor CT1-63V-08a-2F4 -10nFZ C509 5253F103ZV0 ceramic capacitor CT1-63V-08a-2F4 -10nFZ C511 5253F103ZV0 ceramic capacitor CT1-63V-08a-2F4 -10nFZ C602 5253F103ZV0...
  • Page 57 Location No. Part No. Name Type C228 52367472J10 mylar capacitor CL21X-50V-4700PFJ C403 52367563J10 mylar capacitor CL21X-50V-0.056 mui FJ C003 52367104J 10 mylar capacitor CL21X-50V-0.1 mui FJ C118 52367104J10 mylar capacitor CL21X-50V-0.1 mui FJ C226 52367104J10 mylar capacitor CL21X-50V-0.1 mui FJ C229 52367104J10 mylar capacitor...
  • Page 58 Location No. Part No. Name Type C241 52613100MV0 aluminum electrolytic capacitor CD110-16V-10 mui FM C249 52513100MV0 aluminum electrolytic capacitor CD110-16V-10 mui FM C304 52513100MV0 aluminum electrolytic capacitor CD110-16V-10 mui FM C305 52613100MV0 aluminum electrolytic capacitor CD110-16V-10 mui FM C104 52613100MV0 aluminum electrolytic capacitor CD110-16V-10 mui FM C101...
  • Page 59 Location No. Part No. Name Type C506 526EA100MlO aluminum electrolytic capacitor CD288H-160V-10 mui FM C831 52613100MV0 aluminum electrolytic capacitor CD110-16V-10 mui FM C827 52624102M10 aluminum electrolytic capacitor CD110X-25V-1000 mui FM C832 526174*7MV0 aluminum electrolytic capacitor CD110-50V-4.7 mui FM C885 52617101MV0 aluminum electrolytic capacitor CD110-50V-100 mui FM C507...
  • Page 60 Location No. Part No. Name Type Z208 57311045MJ5 ceramic filter LT4.5MJ Z206 5731360MB0Y ceramic filter SFSH6.0MCB Z206 57311060MH5 ceramic filter LT6.0MH Z206 57311060M J5 ceramic filter LT6.0MJ Z205 5731365MB0Y ceramic filter SFSH6.5MCB Z205 51311065MH5 ceramic filter LT6.5MH Z205 51311065MJ5 ceramic filter LT6.5MJ SFSH5.5MCB Z207...
  • Page 61 Location No. Part No. Name Type V821 611308RG257 diode S2L60 D507 61411075D40 diode 2CK75D D507 61414414840 diode 1N4148 V822 611120RU260 diode 2CZRU2 V823 611120RU260 diode 2CZRU2 D501 611120RU260 diode 2CZRU2 D505 611120RU260 diode 2CZRU2 D004 61212036AU0 diode W05Z3.6A D004 612180361UY diode RD3.6EL D004...
  • Page 62 Location No. Part No. Name Type D884 61100111025 diode AU01Z D885 61100111025 diode AU01Z D888 61100111025 diode AU01Z D102 61411075DU0 diode 2CK75D D102 61411075DU6 diode 1N4148 V002 62210150YW0 audion 3CG1015-Y V002 62510150YWY audion 2SA1015-Y V201 62210150YW0 audion 3CG1015-Y V201 62510150YWY audion 2SA1015-Y V203...
  • Page 63 Location No. Part No. Name Type V502 649250830YY audion BU2508DX V502 6442499000Y audion 2SD2499 V502 64424990003 attdion 3DD2499 V502 64424990003 audion 3DD2499 V831 62118150YW6 audion 2SC1815-Y V831 62118150YW0 audion 3DG1815-Y Q888 62118150YW6 audion 2SC1815-Y Q888 62118150YW0 audion 3DG1815-Y V003 62118150YW6 audion 2SC1815-Y V003...
  • Page 64 Location No. Part No. Name Type BC21 583D0443380 crystal oscillator JA18A1-4.433619MHz S801 54111A04S00 power swich KDC-A04-S S901 54167605410 light touch switch KA1W6x5-41 S902 54167605410 light touch switch KA1W6x5-41 S903 54167605410 light touch switch KA1W6x5-41 S904 54167605410 light touch switch KA1W6x5-41 S905 54167605410 light touch switch...
  • Page 65 Location No. Part No. Name Type 52367224J10 mylar capacitor CL21X-50V-0.015 mui FJ 52367224J10 mylar capacitor CL21X-50V-330nFJ 52367224J10 mylar capacitor CL21X-50V-330nFJ 52367224J10 mylar capacitor CL21X-50V-470nFJ 52367224J10 mylar capacitor CL21X-50V-470nFJ 52613100MV0 aluminum capacitor CD110-16V-10 mui FM 52613100MV0 aluminum capacitor CD110X-16V-47 mui FM 55632680J10 invariablenes capacitor LGB0606-10 mui HJ...
  • Page 66 Location No. Part No. Name Type RT21 51911472JW6 chip resistor RC05K472JT RT22 51911472JW6 chip resistor RC05K472JT RT23 51911472JW6 chip resistor RC05K472JT RT24 51911472JW6 chip resistor RC05K472JT RT25 51911472JW6 chip resistor RC05K472JT RT26 51911472JW6 chip resistor RC05K472JT RT33 51911472JW6 chip resistor RC05K472JT RT34 51911472JW6...
  • Page 67 Location No. Part No. Name Type R903 51124471J30 carbon resistor RT14-0.25W-470 ohm J R903 51154471J3Y carbon resistor NAS 1/4471J R905 51124471J30 carbon resistor RT14-0.25W-470 ohm J R905 51154471J3Y carbon resistor NAS 1/4471J R907 51124471J30 carbon resistor RT14-0.25W-470 ohm J R907 51154471J3Y carbon resistor NAS 1/4471J...

  • Page 68: Exploded View 21Bm32/21Bm31

    Location No. Part No. Name Type C905 52613220M10 aluminum electrolytic capacitor C D 110-16V-22 mui FM C906 52613471M11 aluminum electrolytic capacitor CD 110X- 16V-470 mui FM L901 55632101K10 invariablenes inductor LGB0606-100 mui HK D901 61411075DU0 diode 2CK75D I)901 61411075DU6 diode 1N4148 D902 61411075DU0...
  • Page 71 Description: 1. Install the CRT assembly (2) into the front cover assembly (4) with fixing torque of 3.5 ~ 4.5 Nm. 2. Connect cord plugs in the set according to the wiring diagram and position and tie leads according to engineering cards. 3.

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