CRT COLOR TV SET 21CTU93BC
SERVICE MANUAL AKAI 21CTU93BC 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
- Content ......................................................................................................................... 2 - Bill of Materials ............................................................................................................. 3 - Safety Precautions ....................................................................................................... 7 - TV Block Diagram ....................................................................................................
SER DESCRIPTION CABLE & SOCKET 1 AV6-14 2 CH5B-2.5-2DY 3 CH5B-2.5-4DY 4 CH5B-2.5-5DY 5 CH7-10-1DY 6 CH7-10-2DY 7 CH7-8-10-4DY 8 CH9-2.5-2DY-400-CH5B-W (卧式) 9 CH9-2.5-4DY-400-CH5B-4W(卧式)(带屏蔽) 10 CH9-2.5-4DY-450-CH5B 11 CH9-2.5-4DY-550-CH5B 12 CH9-2.5-5DY-500-CH5B 13 H03VVH2-F0.75mmX2C (250MM) short power cord 14 Power cord (2200mm ) 15 RCA-106A (red) 16 RCA-106A (white) 17 RCA-106A (yellow) CARBON RESISTOR 18 RT-1/2W-1KΩ-J 19 RT-1/2W-220KΩ-J 20 RT-1/2W-220Ω-J 21 RT-1/2W-22KΩ-J 22 RT-1/4W-1.
SER DESCRIPTION COIL, IN,LF,TFM 77 130-208-0011 78 3.0mH 79 BCK-42-09936 80 JBC-184-EI19/YDD-EI19 81 JLC/YDD-600µH 82 JLC-128-23µH 83 LG0307-1.
SER DESCRIPTION 143 贴于场IC 144 贴于电源管 OXIDE FILM RESISTOR 145 RF-2W-1.5Ω-J 146 RY-1/2W-120KΩ-J 147 RY-1/2W-2.7KΩ-J 148 RY-1/6W-39K-G 149 RY-1W-180Ω-J 150 RY-1W-1KΩ-J 151 RY-1W-1Ω-J 152 RY-2W-0.47Ω-J 153 RY-2W-12KΩ-J 154 RY-2W-15KΩ-J 155 RY-2W-2.2Ω-J 156 RY-2W-270Ω-J 157 RY-2W-4.7Ω-J 158 RY-2W-47KΩ-J 159 RY-2W-5.6Ω-J 160 RY-2W-8.2Ω-J PCB 161 IU-2103KY-001 162 IU-2103RE-001 163 IVPH-002/21 ver1.1 164 JS02-3AV-14 VER1.2 POLYESTER CAPACITOR 165 CL11-100V-0.0047uF-K 166 CL11-100V-0.0068uF-K 167 CL11-100V-0.
SER DESCRIPTION 4 F22-22R0-031000/JLF-148-ET24 5 YDD-UF16/JLF-98-UF16 JUMPERS 6 10MM POLYPROPYLENE CAPACITOR 7 CBB23A-250VAC-0.1µF-M 8 CBB23A-250VAC-0.1µF-M 9 CBB23A-250VAC-0.22µF-M QTY PCB NO.
. SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the products should not be made.
. TV Block diagram TDA11105-XXXX Vo video TUNER SAW IF IN R IN R RF AGC GIN G B IN B C video video CHROMA AR i1 4052 VIDEO CVBS/Y IN ALi 1 Video IN CVBS1 IN CVBS2 IN 24C08 bus SDA SCL MAOUTR MAOUTL ARo ALo ARi 2 MA IN L MA IN R ALi 2 RGB OUT H OUT V OUT video V2i ALi2 audio audio ALi1 8V AN17821 130V 24V POWER UNIT +13V audio V IN H IN TDA8177 H OUT V OUT H OUT -13V 8V 200V CRT PCB CRT SCREEN FOCUS 5V 3.
. 9
REPLACEMENT OF MEMORY IC 1. MEMORY IC. This TV uses memory IC. In the memory IC are memorized data for correctly operating the video and deflection circuits. When replacing memory IC, be sure to use IC written with the initial value of data. 2. PROCEDURE FOR REPLACING MEMORY IC (1) Power off Switch the power off and unplug the power cord from AC outlet. (2) Replace IC Be sure to use memory IC written with the initial data values. (3) Power On Plug the power cord into the AC outlet and switch the power On.
production doesn't need to carry on M 3~ adjustments of M9. In "M0"~under"M9" appearance press” CALL” the key can get into "M" appearance. At “M”under the appearance press “-/-“ the key can get into “BUS OPEN” appearance, at “BUS OPEN under, press “-/-“ the key recover factory appearance. Remote Hand Unit keys [M1] [M2] [M3] c d e f i g j [M0] b h k Horizontal line Shado [M1] menu MENU0 Geometrical adjustment Receive PAL standard Complete pattern signal. Adjustment steps: a) Adjust V.
I2C standard UOC for export bus control adjustment item default setting MI Items M0 Variable 50HZ 60HZ V. LOPE 63 +/-32 V. SIZE 63 V. SC 2007-12-05 Preset recommendation 50HZ 60HZ Picture vertical center adjustment 35 -01 +/-32 Vertical amplitude adjustment 20 +02 63 +/-32 Vertical S Correction Adjustment 25 -01 V.LINE 63 +/-32 Vertical positions adjustment 18 +02 V.SCR 63 +/-32 Vertical S Correction R 32 -01 +/-32 Horizontal position adjustment 40 0 H.
BTC 0~63 COF 0~1 32 Cut-off control range 1 0:normal control range 1:extended control range M4 CHINESE ON/OFF OSD language selection ON THAI ON/OFF OSD language selection ON VIETNAM ON/OFF OSD language selection ON INDONESIA ON/OFF OSD language selection ON ARABIC ON/OFF OSD language selection ON VA 0~3 Vercital amplitude 0 VAI 0~1 System I output signal amplitude correction 0:no 1 correction 1:amplitude + 12% CBS 0~1 Control sequence of beam current limiting 0:normal o
DCXO 0~3 Crystal load electric capacity compensate 2 FSL 0~1 Forced slicing level for vertical sync 0 SSL 0~1 Slicing level for horizontal sync separator 0:50% 0 1:30%,direction top sync GD 0~1 Group delay on CVBSI signal 0:no group delay 0 correction 1: group delay correction switched on HP2 0~1 AKB ON/OFF DFL 0~1 Sync hronization of OSD/TEXT display 0 Black current stabilization OFF Disable flash protection from deflection timer 0 0:restart horizontal output,after flash protect
DSGLS 0~1 Extra gain selection loudspeaker outputs 0:+0 Db 0 1:+6 Db M7 NRR 0~1 No red reduction during blue stretch 0 AMLOW 0~1 Audio output signal for AM sound 0 GSSIF 0~1 Extra gain-range SSIF for AM demodulation 0 V.P1 0~100 V.P1 volume of VALUE 10 V.P25 0~100 V.P25 volume of VALUE 45 V.P50 0~100 V.P50 volume of VALUE 70 V.P75 0~100 V.
M9 M.COLOR 0~100 mild Color in pp mode 40 M.SHARP 0~100 mildSharpness in pp mode 40 W.BRT 0~100 factory adjusts Brightness 50 W.CONT 0~100 factory adjusts Contrast 75 W.
4 , LOGO EDIT This software LOGO is a pair of pleased words and customer to edit 2 kinds, at the M_MODE, long press[P.P]the key can get into a pair of pleased words editor appearance.
ICs functional description UOC TDA11105-XXXX/TDA11106-XXXX SYMBOL PIN DESCRIPTION IF VO 1 IF video output / selected CVBS output VP2 2 2ND Supply voltage TV processor(+5v) VCC AUDIO 3 8 volt supply for audio switches(+5V~8V) PLL IF 4 IF-PLL loop filter GND2 5 Gaound 2 for TV processor DECSDEM 6 decoupling sound demodulator or SIF input 2 FMDEMOUT 7 audio output /AM audio output (volume controlled) EHTO 8 EHT/overvoltage protection input AGC 9 Tuner AGC output IREF 10 Referenc
VDDC 40 Supply(3.3V) GND5 41 Ground 5 VPE 42 OPT programming Voltage VDDA 43 Supply voltage(3.
BLOCK AND APPLICATION DIAGRAM TDA7266SA VCC 3 0.22µF 4 IN1 + 470µF 13 1 OUT1+ 2 OUT1- 15 OUT2+ 14 OUT2- 100nF ST-BY 7 S-GND 0.22µF IN2 9 - Vref + 12 + - MUTE 6 PW-GND 8 + D94AU175B ABSOLUTE MAXIMUM RATINGS Symbol Value Unit Vs Supply Voltage Parameter 20 V IO Output Peak Current (internally limited) 2 A Ptot Total Power Dissipation (Tamb = 70°C) Top Operating Temperature Tstg, Tj 20 W 0 to 70 °C -40 to 150 °C Value Unit Typ = 1.8; Max. = 2.
Symbol Parameter Ri Input Resistance VTMUTE Mute Threshold VTST-BY IST-BY eN Test Condition Min. Typ. 25 30 Max. KΩ for VCC > 6.4V; Vo = -30dB 2.3 2.9 4.1 V for VCC < 6.4V; Vo = -30dB VCC/2 -1 VCC/2 -075 VCC/2 -0.5 V 0.8 1.3 1.8 V 100 µA St-by Threshold St-by Current V6 = GND Total Output Voltage Unit A Curve; f = 20Hzto 20KHz Distortion vs Frequenc µV 150 Gain vs Frequency Le vel(dB r) THD(%) 5.0000 10 4.0000 1 Vcc = 11V Rl = 8 oh m Po ut = 1W 3.
LA9302A/8177/LA78041/LA78040 Symbol PIN Function : vertical output Function Symbol PIN Function INV IN 1 Input V OUT 5 Vertical output VCC1 2 Power VCC2 6 Output power supply PUMP UP 3 Pump up power NON INV IN 7 Negative feedback GND 4 Ground Test point Waveforms 1.2Vpp 2.6Vpp H H TDA11105 PIN1 TDA11105 PIN52 95Vpp 3.8Vpp H H TDA11105 PIN45 TDA11105 PIN44 95Vpp H 1Vpp V 0.9Vpp 95Vpp H CRT KG 0.8Vpp CRT KR 2.5Vpp H TDA11105 PIN56 H CRT KB 1.3Vpp 2.
PURITY / CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT WEDGE 1. Demagnetize CRT with the demagnetizer. 2. Loosen the retainer screw of the deflection yoke. 3. Remove the wedges. 4. Input a green raster signal from the signal generator, and turn the screen to green raster. DEFLECTION YOKE P CRT 5. Move the deflection yoke backward. 6. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig2) 4 6 P/C MAGNETS 7.
STATIC CONVERGENCE ADJUSTMENT 1. Input a crosshatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) and turn them to magenta (red/blue). 3. Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the center of the screen and turn them to white. (FRONT VIEW) 4. Repeat 2 and 3 above, and make the best convergence. Fig. 1 (FRONT VIEW) DYNAMIC CONVERGENCE ADJUSTMENT RED 1.
21CTU93BC
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