电视机原理图
海信液晶电视机5655主板电路原理图
2k
C50 1n/50V/NC
C912 100n/16V/NC
R1041 R1036 150k
Rev 1.0 Sheet 2 of 10
5
4
3
2
5
4
3
2
1
To LVDS
5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 2 2 5 TEEP TEEN TEDP TEDN TECLKP TECLKN TECP TECN TEBP TEBN TEAP TEAN TOEN TOEP TODP TODN TOCLKP TOCLKN TOCP TOCN TOBP TOBN TOAP TOAN BL_EN BL_ADJ LD_EN
LED-R
3.3Vstb
MMBT3904LT1 2 3
R144 10k
RV100 AVLC18S02015 R146 0R LEDR
RV101 AVLC18S02015
ADC3
RV102 AVLC18S02015
M3V3 N90 +12V_in
A
SW_Core1 SS EN COMP PAD FB 8 C48 7 6 5 10n/50V C67 10n/50V BST_Core1 R20
To Video input
6 VGA_DDC_SCL 6 VGA_DDC_SDA 6 VGA_HS 6 VGA_VS 6 6 6 6 6 6 6 6 VGA_B+ VGA_BVGA_G+ VGA_R+ PB0+ YPbPr0Y0+ PR0+ VGA_DDC_SCL VGA_DDC_SDA VGA_HS VGA_VS VGA_B+ VGA_BVGA_G+ VGA_R+ PB0+ YPbPr0Y0+ PR0+
海信液晶电视机5277主板电路原理图
HDMI2
B
+5V_SW
LD1117A-3V3 3.3V_Tuner +5V_SW LDO N401
Tuner/ss/xg/SP MXL601 KEY/SOC N24
AV2/YUV
A
5
4
3
网网
+12V
TPS54528 DC/DC N10
VCCK1V2
DDR3 16X2
AV1
AV2 YUV
VGA
Size C Date:
2.2uf eMMC eMMC
3V3
VCCK,
R66 R199 10k LED_Ctrl2
2 2
VIN
SW
6
L11
4.7 uH
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（
C542 8.2n/50V
VOUT = 0.765
1+R1/R2)
3.3V Power_Standby
10k
2
V10 C7 R245 MMBT3904LT1 100n/16V/NC 47k
BL_DIMMING
R48 10k
3
R19 C3 100n/16V/NC 4.7k/NC
2
1
BL_ON_OFF
R12
4.7k
1
1
R47 10k C4 2.2u/10V/NC D4 D4 D4 D4 R69 10k/NC
USB HUB
Wifi
USB2
C
1
1
2
MT5505
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VGA
VGAX1
HDMI
HDMIX2
黑白电视机原理框图
•
C点为混频器的输出端。由于本振频率(8频 道fL =222.25 MHz)比图像高频载频(fP=184.25MHz) 高 38MHz ， 比 伴 音 高 频 载 频 (fS=190.75MHz) 高 31.5MHz ，则混频器输出信号包络不变，但载频已 由高频变换为中频，如图(c)所示，它的频谱如图(c′) 所示，频谱结构与图(b′)相比处于倒置位置。 • 混频器输出的图像中频、伴音中频被送入 中频放大器进行放大。整机增益主要是由中频放大 器提供。由于采用残留边带调制方式，因此要求中 频放大器具有特定的幅频特性(原因说明见1.5.4节)， 如图2-6(c″)或图2-7 所示。图中在38MHz 图像中频处， 其增益为中放最大增益的50%，在31.5MHz伴音中频 载频处的中放增益只有 5%，即对伴音信号附加衰减 20 倍，使被崐中频放大器放大后的全中频电视信号 中，伴音信号远远小于图像信号，以防止干扰图像。
图 2-7
•
另外，由于被天线截取的邻近频 道干扰信号，如7频道伴音载频fS7 (182.75MHz)和9频道的图像载频fP9 (192.25 MHz)，实际上不可能被输入回路、 高放的选择回路全部滤掉，它们一旦进入 变频器，将会与8频道的本振频率fL差拍出 30MHz和39.5MHz的中频干扰频率。因此， 在中频放大器中采用专门电路对此两干扰 频率加以抑制，故中放幅频特性在30MHz 和39.5 MHz的固定频率处有两个吸收点。 这样，中频放大器输出端D点的信号波形 不变，特性，对 图像信号进行峰值包络检波，得到视频图像信号 (0 ～ 6MHz) 。并且以图像中频为载频与伴音中频信 号混频，变换产生第二伴音中频信号(6.5 MHz)。将 其输出的两个信号送至检波输出电路。 • 预视放级的作用是分离图像信号和伴音信 号，并在输出的电视信号中取样，提供通道自动增 益控制 (AGC) 电压和扫描系统所需要的复合同步信 号。它将视频图像信号送到视频放大器，放大 ( 约 34dB ～ 38dB ) 并恢复直流后，送至显像管的阴极 或控制栅极，使之在显像管屏幕上重现图像。 • 第二伴音中频信号经伴音中放放大、限幅 后，由鉴频器解调出原始伴音信号，送至低频电压、 功率放大器进行放大后，在扬声器恢复原伴音。
LG电视机CT-21K49Z电路原理图
Y Safety Precautions1. It is safe to adjust after using insulating transformerbetween the power supply line and chassis input to prevent the risk of electric shock and protect the instrument.2. Never disconnect leads while the TV receiver is on.3. Don't short any portion of circuits while power is on.4. The adjustment must be done by the correct appliances.But this is changeable in view of productivity.5. Unless otherwise noted, set the line voltage to 230Vac!10%,50Hz.Y Test Equipment required1. RF signal generator (with pattern generator)2. DC Power Supply3. Multimeter (volt meter)4. Oscilloscope5. Color analyzer:RF AGC (Automatic Gain Control) Adjustment The RF AGC was aligned at the time of manufacture for optimum performance over a wide range conditions.Readjustment of RF AGC should not be necessary unless unusual local conditions exist, such as ;1) Channel interference in a CATV system.2) Picture bending and/or color beats, which are unusuallydue to excessive RF signal input when the receiver is too close to a transmitting tower or when the receiver is connected to an antenna distribution system where the RF signal has been amplified. In this case, the input signal should be attenuated (with pad or filter) to a satisfactory level.3) Picture noise caused by "broadcast noise" or weak signal.If the broadcast is "clean" and the RF signal is at least 1mV (60dBu), the picture will be noise free in any area.Adjusting RF AGC to one end of rotation will usually cause a relatively poor signal to noise ratio;Adjusting to the other end of rotation will usually cause a degradation of over load capabilities resulting in color beats or adjacent channel interference. :Screen Voltage Adjustment1) Input the Color Bar Pattern into Antenna jack.2) Select CutOff of SVC-3 mode.3) Turn the screen control clockwise until the Horizontal lineis visible and turn it counterclockwise until the Horizontal line is faintly visible.:Focus AdjustmentNOTE:This adjustment should be performed after warming up for 10 minutes.1) Input the Color Bar Pattern into Antenna jack.2) Adjust the Focus control of FBT for best overall focus.:VCO Adjustment1) Input Digital Pattern into Antenna jack.2) Select A-PIF of SVC-4 mode.3) Press VOL F/G button and A-PIF will be changed 0 to 1while the number of PIF-C is rolling.4) When PIF-C stops rolling, A-PIF will be changed 1 to 0 andVCO adjustment is finished.Caution : Do not press the Volume button again in A-PIF mode after adjustment is finished.ADJUSTMENT-1-:Deflection Data Adjustment (Line SVC-2)1. Preparation for Adjustment1) Select SVC-2 Mode.2) Tune the TV set to receive Digital Pattern and set ARCMode to Standard.2. Initial deflection data and average data for CPT3. Adjustment1) VL(Vertical Linearity) AdjustmentSelect VL adjustment mode to adjust the upper and lower vertical size to be the same for horizontal center line.2) VS(Vertical Shift) AdjustmentAdjust the geometrical horizontal center line of the screen to be coincided with the vertical center line of CPT.3) VA(Vertical Amplitude) AdjustmentAdjust the upper and lower part of big circle of the received pattern to be placed on 6~7mm from the valid screen.4) HS(Horizontal Shift) AdjustmentAdjust the geometrical vertical center line of the received screen to be coincided with the horizontal center line of CPT.5) SC(Vertical S Correction) AdjustmentAdjust the width of upper/center/lower grid of the received pattern to be the same.:SECAM Background Color Adjustment(CT-, CF-) 1. Preparation for AdjustmentSelect ÒS R-YÓ or ÒS B-YÓ of SVC Mode 4.2. AdjustmentWhile switching SECAM and PAL channels in turns, press VOL F/G key until the background color of SECAM channel to be the same as that of PAL Pattern at S R-Y or S B-Y.:White Balance Adjustment.(LINE SVC-1)NOTE :This adjustment should be performed after screen voltage adjustment.1) Tune the TV set to receive 100% white pattern.2) Select SVC-1 Mode.3)Press PR UP/DOWN key to select BG, GG, BG, GC.Adjust BG, GG on Brightness 40!1FL and BG, GC on Brightness 4.5!0.5FL with VOL F/G key to get the color value.4) Adjust BG, GG from the initialized data to get the color value ofX=281!8, Y=288!8.5) R,G,B initial data and average data:Sub Brightness AdjustmentNOTE:This adjustment should be performed after White Balance adjustment.1) Input FUBK pattern to Antenna jack.2) Select S-BRI of SVC-3 mode.3) Press VOL F/G until (a) and (b) of FUBK are distinct andpress VOL G twice more.:OPTION Adjustment (SVC MODE:OPTION-1, OPTION-2)NOTE:When the EEPROM has been replaced, the Option data should be restored as the function of individualsystem and specification.1) Press OK buttons on both TV set and Remote Controller atthe same time to get into SVC mode.2) Press the Yellow button several times to find OPTION-1 orOPTION-2.3) Input the correspond OPTION data referring to Table belowwith the numeric buttons 0~9.StatusRCGCBCGGBGInitial Data1271471235964Remark(a)(b)- 2-- 3-Table 1. OPTION 1 FunctionTable 2. OPTION 2 FunctionSingle SYSTEM(CA-)South East Asian DUAL W/O RF 3.58(CF-,CZ-)W/RF 3.58(CT-,CD-)with RGB InputEYE TOP H-TONE4 KEYSCART CCTV SYSTEMOptionCode 0123010*********FunctionRemarkBG Only BG+TAI DUAL BG+I+DK BG+I+DK+M W/O CCTV W/CCTVPhono Jack or Camera-in Jack Scart Jack6 Key(MENU, OK, VOL-, VOL+, PR-, PR+)4 Key(TV/AV, ROTATE, PR-, PR+)W/O EYE W/EYETeletext Top function Disable Teletext Top function Enable Blue Background OSD MENU Half Tone OSD MENULG8993-27A/BLG8993-28A LG8993-29A CURVETBS HOTELLANG-INDEXLANG.Option Code 0 00 11 00123401234501234010101FunctionRemarkMulti English Only TWO Lang.English CIS China Romania Poland English France Hindi Arab Urdu Parsi English Indonesia Malay Vietnam ThaiFast Volume Curve Slow Volume Curve TBS Function Disable TBS Function Enable HOTEL Function Disable HOTEL Function EnableTROUBLESHOOTING1. No Power (Not working SMPS)2. No Power On (SMPS working)8. No TeletextBLOCK DIAGRAMPRINTED CIRCUIT BOARD MAINEXPLODED VIEW(CT-14G29)-1-- 2-EXPLODED VIEW PARTS LISTREPLACEMENT P ARTS LISTFor Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows;CC, CX, CK, CN : Ceramic CQ : Polyestor CE : ElectrolyticRD : Carbon FilmRS : Metal Oxide Film RN : Metal Film RF : FusibleLOCA. NO PART NO DESCRIPTIONC18 C19 C20 C22 C23C24C25C26C27 C28 C29C30 C91 C100 C101 C102 C103 C104 C106 C107 C108 C109 C112 C113 C114 C115 C151 C152 C153 C154 C155 C156 C157 C159 C162 C201 C202C205 C221 C222 C223 C225 C226 C227 C258 C292 C293 C294 C295 C301 C303 C304 0CN2210K5190CN1030F6790CE108DD6180CX5600K4090CX5600K4090CE106DK6180CE106DK6180CE106DK6180CN1040K9490CN1040K9490CN1040K9490CE106DF6180CN2210K5190CN1030F6790CN1030F6790CN1040K9490CE105DK6180CE107DD6180CN1030F6790CX5600K4090CX5600K4090CE106DK6180CE475DK6180CN1030F6790CN1030F6790CN1030F6790CE106DK6180CN1040K9490CX4700K4090CX3900K4090CN3310K5190CX5600K4090CX5600K4090CN1040K9490CN3320F5690CE226DF6180CX3900K4090CQ1531N5090CE476DF6180CE106DK6180CE106DK6180CX5100K4090CX5100K4090CE106DK6180CE106DK6180CN1030F6790CN1030F6790CN1010K5190CN1010K519181-007H0CK4710W5150CK4710W515220P 50V K10000P 16V M1000UF STD 10V M56P 50V J56P 50V J10UF STD 50V M10UF STD 50V M10UF STD 50V M0.1M 50V Z0.1M 50V Z0.1M 50V Z10UF STD 16V M220P 50V K10000P 16V M10000P 16V M0.1M 50V Z1UF STD 50V M100UF STD 10V M10000P 16V M56P 50V J56P 50V J10UF STD 50V M4.7000UF STD 50V M10000P 16V M10000P 16V M10000P 16V M10UF STD 50V M0.1M 50V Z47P 50V J39P 50V J330P 50V K56P 50V J56P 50V J0.1M 50V Z3300P 16V K22UF STD 16V M39P 50V J0.015U 100V K47UF STD 16V M10UF STD 50V M10UF STD 50V M51P 50V J51P 50V J10UF STD 50V M10UF STD 50V M10000P 16V M10000P 16V M100P 50V K100P 50V KECQ-V1H474JZ3(TR),50V 0.4470PF 500V K470PF 500V KLOCA. NO PART NO DESCRIPTIONC305C306C307C308C309C310C311C312C313C314C315C402C404C405C406C408C412Ò(20Ó)Ò(21Ó)C413C414Ò(20Ó)C418C501C502C503C504C505C506C507C508C509C510C511C512C513C514C515C516C517C518Ò(20Ó)C519C520C521C522C525C526C527C528C529C5300CN1020K5190CN1020K5190CE107DJ6180CN1020K5190CE477DJ6180CQ1041N5090CE228DJ61A0CQ1041N509181-007T0CQ6831N5090CE474DK618181-091V0CQ1531N5090CE476DF6180CN1030F6790CE106DK618181-013C181-013P181-013B0CK2220W515181-015E181-015F181-009R0CQ3321N5090CQ2221N5090CE224DK6180CX1100K4090CN1020K5190CN1040K9490CE227DF6180CE337DF6180CN1030F6790CE107DD6180CE226DF6180CE105DK618181-007F0CE337DF6180CN1030F6790CE107DD6180CE105DK6180CQ4721N5090CQ3921N4090CE474DK6180CN1030F6790CE476DF6180CN1030F679181-007H181-007F0CE106DK6180CX5600K4090CX5600K4090CE105DK6181000P 50V K1000P 50V K100UF STD 35V M1000P 50V K470UF STD 35V M0.1U 100V K2200UF STD 35V M0.1U 100V KECQ-V1H105JZ3(TR),50V 1.00.068U 100V K0.4700UF STD 50V M2KV R 391K TP7.50.015U 100V K47UF STD 16V M10000P 16V M10UF STD 50V MMPP 200V 0.39UF JMPP 400V 0.33UF JMPP 200V 0.36UF J2200P 500V K BMPP 1600V 0.0068UF HMPP 1600V 0.0073UF HPP 200V 0.022UF K0.0033U 100V K0.0022U 100V K0.2200UF STD 50V M11P 50V J1000P 50V K0.1M 50V Z220UF STD 16V M330UF STD 16V M10000P 16V M100UF STD 10V M22UF STD 16V M1UF STD 50V MECQ-V1H224JZ3(TR),50V 0.2330UF STD 16V M10000P 16V M100UF STD 10V M1UF STD 50V M0.0047U 100V K0.0039U 100V J0.4700UF STD 50V M10000P 16V M47UF STD 16V M10000P 16V MECQ-V1H474JZ3(TR),50V 0.4ECQ-V1H224JZ3(TR),50V 0.210UF STD 50V M56P 50V J SL56P 50V J SL1UF STD 50V MFor Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows;CC, CX, CK, CN : CeramicCQ : PolyestorCE : ElectrolyticRD : Carbon FilmRS : Metal Oxide FilmRN : Metal FilmRF : FusibleFor Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows;CC, CX, CK, CN : Ceramic CQ : Polyestor CE : ElectrolyticRD : Carbon FilmRS : Metal Oxide Film RN : Metal Film RF : FusibleLOCA. NO PART NO DESCRIPTIONR40Ò R44 R45 R46 R47 R51 R52 R54 R55 R56 R57 R58 R59 R60 R63R64 R100 R101 R102 R103 R104 R105 R106 R107 R110 R130 R151 R152 R153 R154 R155 R156 R157 R158 R161 R164 R165 R166 R167 R168 R169 R170 R171 R172 R201Ò R202 R203R204R205 R206 0RD5101F6090RD7501F6090RD4701F6090RD1002F6090RD4701F6090RD1000F6090RD4701F6090RD4701F6090RD1000F6090RD1000F6090RD4701F6090RD4701F6090RD4701F6090RD4701F6090RD4701F6090RD4701F6090RD1001F6090RD0392F6090RD1201F6090RD2701F6090RD0272F6090RD1000F6090RD1000F6090RD1201F6090RD0562F6090RS0392K6070RD2200F6090RD1000F6090RD1000F6090RD0102F6090RD1501F6090RD9101F6090RD4700F6090RD3301F6090RD3900F6090RD3900F6090RD2200F6090RD2200F6090RD2200F6090RD2200F6090RD1002F6090RD1002F6090RD1001F6090RD1001F6090RD1002F6090RD0682F6090RD0562F6090RD4700F6090RD3600F6090RD0752F6090RD0752F6090RD5101F6095.1K 1/6W 5 TA527.5K 1/6W 5 TA524.70K 1/6W 5% TA5210K 1/6W 5 TA524.70K 1/6W 5% TA52100 1/6W 5 TA524.70K 1/6W 5% TA524.70K 1/6W 5% TA52100 1/6W 5 TA52100 1/6W 5 TA524.70K 1/6W 5% TA524.70K 1/6W 5% TA524.70K 1/6W 5% TA524.70K 1/6W 5% TA524.70K 1/6W 5% TA524.70K 1/6W 5% TA521K 1/6W 5% TA5239 1/6W 5% TA1.2K 1/6W 5 TA522.7K 1/6W 5 TA5227 1/6W 5 TA52100 1/6W 5 TA52100 1/6W 5 TA521.2K 1/6W 5 TA5256 1/6W 5% TA5239 2W 5% TA62220 1/6W 5 TA52100 1/6W 5 TA52100 1/6W 5 TA5210 1/6W 5 TA521.5K 1/6W 5 TA529.1K 1/6W 5 TA52470 1/6W 5 TA523.3K 1/6W 5 TA52390 1/6W 5 TA52390 1/6W 5 TA52220 1/6W 5 TA52220 1/6W 5 TA52220 1/6W 5 TA52220 1/6W 5 TA5210K 1/6W 5 TA5210K 1/6W 5 TA521.0K 1/6W 5 TA521.0K 1/6W 5 TA5210K 1/6W 5 TA5268 1/6W 5 TA5256 1/6W 5 TA52 *SCART470 1/6W 5 TA52360 1/6W 5 TA5275 1/6W 5 TA5275 1/6W 5 TA525.1K 1/6W 5 TA52For Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows;CC, CX, CK, CN : CeramicCQ : PolyestorCE : ElectrolyticRD : Carbon FilmRS : Metal Oxide FilmRN : Metal FilmRF : FusibleLOCA. NO PART NO DESCRIPTIONR207R208 R209 R210R211 R212 R213 R214 R215 R221Ò R222 R223 R224 R226 R228Ò R240 R250 R290 R291 R303 Ò(20Ó) Ò(21Ó) R304 Ò(21Ó) R305 R306 R309 Ò(20Ó) Ò(21Ó) R310 R311 Ò(21Ó) R312 R313 R314 R315 R402 R403 R405 Ò(20Ó) R407 Ò(21Ó) R409 R410 Ò(20Ó) Ò(21Ó) R411 R412 R413 R414 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 1/6W 5 TA5275 1/6W 5 TA521.0K 1/6W 5 TA521.0 1/6W 5 TA5243K 1/6W 5 TA52620 1/6W 5 TA5210K 1/6W 5 TA521.0K 1/6W 5 TA52120K 1/6W 5 TA52300 1/6W 5 TA52200 1/6W 5 TA521.2K 1/6W 5 TA521.0K 1/6W 5 TA5262K 1/6W 5 TA521.0K 1/6W 5 TA521.8K 1/6W 5 TA521.2K 1/6W 5 TA52 *SCART75 1/6W 5% TA1K 1/6W 5% TA220 1/2W 5% TA220 1/2W 5% TA4.7 1/2W 5 TA523.9 1/2W 5 TA523.3 1/2W 5 TA524.7 1/2W 5 TA523.9 1/2W 5 TA5251K 1/6W 5 TA524.70K 1/6W 5% TA525.1K 1/2W 5 TA521.2K 1/2W 5 TA523K 1/2W 5 TA522.2 1/2W 5 TA521.5K 1/6W 5 TA521.2K 1/6W 5 TA521.0K 1/6W 5 TA5282K 1/6W 5 TA52910 1/6W 5 TA52390 1/2W 5 TA5210K 1/2W 5 TA52510 1/2W 5 M1582OHM 1 W 5% TA6247 1 W 5% TA6212K 1W 5% TA6215K 1W 5% TA6233 1/2W 5 TA52130K 1/2W 5 TA52100K 1/2W 5 TA5291K 1/2W 5 TA52470 1/6W 5 TA52360 1/6W 5 TA52330 1/2W 5 TA5215K 1/6W 5 TA52LOCA. NO PART NO DESCRIPTIONR418R501R502R503R504R505R506R507R508R509R510R511R512R513R514R515R516R517R518R519R520R521R522R523R524R525R526R527R528R529R530R531R532R533R535R536R538R539R540R541R542R544R548R549R550R551R552R554R555R556R561R5620RD1200F6090RD3002F6090RD1000F6090RD1000F6090RD1000F6090RD3302F6090RD1000F6090RD1000F6090RD1001F6090RD1001F6090RD4701F6090RD5100F6090RD2202F6090RD5600F6090RD4703F6090RD1000F6090RD2201F6090RD3002F6090RD1302F6090RD1502F6090RD1202F6090RD1000F6090RD1002F6090RD0102F6090RD1000F6090RD6801F6090RD2201F6090RD1000F6090RD2200F6090RD0752F6090RD1000F6090RS0682J6070RD3902F6090RD3900F6090RD2200F6090RD2201F6090RD5102F6090RD1002F6090RD1002F6090RD2001F6090RD1001F6090RD1002F6090RD1002F6090RD1001F6090RD2001F6090RD2001F6090RD2001F6090RS0472H6090RD2203H6090RD1504F6090RD1001F6090RD6201F609120 1/6W 5 TA5230K 1/6W 5 TA52100 1/6W 5 TA52100 1/6W 5 TA52100 1/6W 5 TA5233K 1/6W 5% TA52100 1/6W 5 TA52100 1/6W 5 TA521.0K 1/6W 5 TA521.0K 1/6W 5 TA524.70K 1/6W 5% TA52510 1/6W 5 TA5222K 1/6W 5 TA52560 1/6W 5 TA52470K 1/6W 5 TA52100 1/6W 5 TA522.2K 1/6W 5 TA5230K 1/6W 5 TA5213K 1/6W 5 TA5215K 1/6W 5 TA5212K 1/6W 5 TA52100 1/6W 5 TA5210K 1/6W 5 TA5210 1/6W 5 TA52100 1/6W 5 TA526.8K 1/6W 5 TA522.2K 1/6W 5 TA52100 1/6W 5 TA52220 1/6W 5 TA5275 1/6W 5% TA100 1/6W 5 TA5268 1W 5% TA6239K 1/6W 5 TA52390 1/6W 5 TA52220 1/6W 5 TA522.2K 1/6W 5 TA5251K 1/6W 5 TA5210K 1/6W 5 TA5210K 1/6W 5 TA522.0K 1/6W 5 TA521.0K 1/6W 5 TA5210K 1/6W 5 TA5210K 1/6W 5 TA521.0K 1/6W 5 TA522.0K 1/6W 5 TA522.0K 1/6W 5 TA522.0K 1/6W 5 TA5247 1/2W 5 TA52220K 1/2W 5 TA521.5M 1/6W 5 TA521.0K 1/6W 5 TA526.2K 1/6W 5 TA52For Capacitor & Resistors, thecharactors at 2nd and 3rd digitin the P/No. means as follows;CC, CX, CK, CN : CeramicCQ : PolyestorCE : ElectrolyticRD : Carbon FilmRS : Metal Oxide FilmRN : Metal FilmRF : FusibleFor Capacitor & Resistors, the charactors at 2nd and 3rd digit in the P/No. means as follows;CC, CX, CK, CN : Ceramic CQ : Polyestor CE : ElectrolyticRD : Carbon FilmRS : Metal Oxide Film RN : Metal Film RF : Fusible。
电视机技术.ppt
偶场结束
场消隐 1.6mS= 25行
奇场开始
4.7μS
621 622 623 624 625 1 2 3 4 5 6
4.7μS 12μS
前均衡 奇场场同步 后均衡
2.5行
2.5行
2.5行
64μS 7 22 23 24 25
309 310 311 312 313 314 315 316 317 318 319 320 335 336 337 338
1
ｔ3 ｔ5 ｔ4
ｔ
正程52 μｓ传送图像 逆程12μｓ 消隐
52μｓ 64μｓ
12μｓ
行频 ｆH＝15625Hｚ
电流方向
水平亮线
行偏转线圈
行扫描
ｂ
正程
显像管阴极
O ａ
显像管屏幕
磁场方向
2、场(垂直)扫描
Iｖ
场扫描电流 ｃ
ｃ
场扫描周期：20ｍｓ
ｏ
ｏ
ｏ
ｔ
正程 18.4ｍｓ，传送图像
ｄ
逆程 1.6ｍｓ，消隐 场频ｆｖ＝50Hz
64μS
前均衡 偶场场同步
2.5行
2.5行
奇场结束 偶场开始
后均衡
2.5行
ｖ
同步电平100%
消隐电平75 %
（黑电平）
白电平 10～12.5 %
0
一行黑白全电视信号示意图
64μS
52μS 正程图像信号
4.7μS 行同步信号 行消隐信号
12μS
ｔ
5、几种现象的判断
行消隐脉冲 电视信号
正常行偏 转电流
12μS
消隐脉冲与同步脉冲的关系
行同步 行消隐
160μｓ
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监控室显示器信号框架图
Haier29F9G电视机电路框架图
箭头线标示电源供电线路，变压器输出一个130V,两个25V,一个10V直流电源ቤተ መጻሕፍቲ ባይዱ130V到高压包，高压包输出一个1100V高压到显像管，输出一个200V到视放供电，输出加速器电压350V,还有一组输出到集焦。一个25V到行激励变压器和场块，10V到两个7805，一个25V到伴音功放。
监控室显示器电路框架图
箭头线标示供电线路，变压器输出一个100V,一个20V，一个7V，一个13V，一个15V.100V电压到高压包，高压包分别输出六组电压，130V到行管，15V到场块，1100V到显像管，300V到加速器，180V到视放供电，一组到集焦。20V到行激励变压器，7V到7805,13V到7808和7812,15V到伴音功放。