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SERVICE MANUAL
Color Television Receiver
Model: KP2107ASTN
SPECIFICATION
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SPICIFICATION
System
TV
PAL SECAM
D/K, B/G ,I D/K,B/G
AV
PAL SECAM NTSC
50/60 50 4.43/3.58MHz
Channel
VHF-Low VHF-High: UHF:
49.75MHz~160.25MHz 168.25MHz~456.25MHz 471.25MHz~863.25M
Scanning
Line 625/525 Line Horizontal Frequency 15625/15750 Hz Vertical 50/60 Hz Video Sound Chroma 38.9MHz 32.4/32.9/33.4 MHz 34.47 MHz 34.4 MHz(SECAM) 34.65 MHz(SECAM) 48 dBV 48 dBV 51 dBV
IF Frequency
Sensitivity
VHF LOW VHF HIGH UHF
Audio Output Power Antenna Impedance Power Consumption Power Supply
7% THD 1.2W + 1.2W 75 75W AC 110-240V 50/60Hz
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IMPORTANT SERVICE SAFETY INFORMATION
Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. Exercise care when servicing this chassis with power applied. Many B plus and high voltage RF terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain interconnecting ground lead connections between chassis, escutcheon, picture tube dag and tuner when operating chassis. These receivers have a "polarized" AC line cord. The AC plug is designed to fit into standard AC outlets in one direction only. The wide blade connects to the 'ground side' and the narrow blade connects to the 'hot side' of the AC line. This assures that the TV receiver is properly grounded to the house wiring. If an extension cord must be used, make sure it is of the 'polarized' type. Since the chassis of this receiver is connected to one side of the AC supply during operation, service should not be attempted by anyone not familiar with the precautions necessary when working on these types of equipment. When it is necessary to make measurements or tests with AC power applied to the receiver chassis, an Isolation Transformer must be used as a safety precaution and to prevent possible damage to transistors. The Isolation Transformer should be connected between the TV line cord plug and the AC power outlet. Certain HV failures can increase X-ray radiation. Receivers should not be operated with HV levels exceeding the specified rating for their chassis type. The maximum operating HV specified for the chassis used in these receivers is 27kV±1.0kV at zero beam current with a liner voltage of 110/240V AC. Higher voltage may also increase the possibility of failure in the HV supply. It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the receiver that could cause a rise in high voltage, or operating supply voltages. No changes should be made to the original design of the receiver. Components shown in the shaded areas on the schematic diagram and identified by in the replacement parts list should be replaced only with exact factory recommended replacement parts. The use of unauthorized substitute parts man creates may create shock, fire, X-ray radiation, or other hazards. To determine the presence of high voltage, use accurate high impedance HV meter connected between the second anode lead and the CRT dag grounding device. When servicing the High Voltage System remove static charges from it by connecting a 10K Ohm resistor in series with an insulated wire (such as test probe) between the picture tube dag and 2nd anode lead (Have AC line cord disconnected from AC supply). The picture tube used in this receiver employ integral implosion protection. Replace with a tube of the same type number for continued safety. Do not lift picture tube by the neck. Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely. Keep others without shatter proof goggles away. Before returning the receiver to the user, perform the following safety checks: 1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver. 2. Replace all protective devices such as non-metallic control knobs, insulating fishpaper, cabinet backs, adjustment and compartment covers of shields, isolation resistor-capacitor networks, mechanical insulators etc. 3. To be sure that not shock hazard exists, a check for the presence of leakage current should be made at each exposed metal part having a return path to the chassis (antenna, cabinet metal, screw heads knobs and/or shafts, escutcheon, etc.) in the following manner. Plug the AC line cord directly into a 110V/240V, AC receptacle. (Do not use an Isolation Transformer during these checks.) All checks must be repeated with the AC line cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the purpose of completing these checks.) If available, measure current using an accurate leakage current tester. Any reading of 0.35mA or more is excessive and indicates a potential shock hazard, which must be corrected before returning the receiver to the owner. If a reliable leakage current tester is not available, this alternate method of measurement should be used. Using two clip leads, connect a 1500 Ohm, 10 Watt resistor paralleled by a 0.15MF capacitor in series with a known earth ground, such as a water pipe or conduit and the metal part to be checked. Use a VTVM or VOM with
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1000 Ohms per Volt, or higher, sensitivity to measure this AC voltage drop across the resistor. Any reading of 0.35 Volt RMS of more is excessive and indicates potential shock hazard which must be corrected before returning the receiver to the owner.
PLEASE READ BEFORE ATTEMPTING SERVICE 1. Use an Isolation Transformer when performing any service on this chassis. 2. Never disconnect any leads while receiver is in operation. 3. Disconnect all power before attempting any repairs. 4. Do not short any position of the circuit while the power is on. 5. For safety reasons, replace components any with identical replacement parts (SEE PARTS LIST). 6. Before alignment, warm up the TV for at least 30 minutes and demagnetize the CRT with an external degaussing coil. 7. When removing a PCB or related component, after unfastening or changing a wire, be sure to put the wire back in its original position. 8. Inferior silicon grease can damage IC's and transistors. When replacing IC's and transistors, use only specified silicon grease. Remove all old silicon when applying new silicon. 9. Before removing the anode cap, discharge electricity because it contains high voltage.
ALIGNMENT PROCEDURES
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Service Flow Chart
Power supply check input voltage check voltage of C910 anode check Pin 4 of N901(17v) check V901 check output voltage of T901 secondary coil check voltage of N905,N906 Pin 3(5.0v) and N904 Pin3 (9.0V) check voltage of N103 Pin 3,15,45(5v) and Pin25,54 (3.3v) Audio circuit check power supply of audio power amplify circuit(25V) check input audio signal of audio power amplify circuit check waveform of XS203 Pin1 Pin 5 Horizontal circuit Check voltage of C960 anode 108V check waveform of V401 Base check waveform of V402 Collector check output voltage of T402 coil check waveform of T402 Pin 8 Vertical circuit: check voltage of C963 anode +12V ,C964 anode 12V check waveform of N103 Pin 34 Pin35 check waveform of N401 Pin 1 Pin7 check waveform of N401 Pin 5 UOC circuit: check voltage of N103 Pin 7 (5v) and Pin32 (0v) check Pin6 (5v) check waveform of N103 Pin31
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ADJUSTMENT MANUAL Test Notices 1. Please follow the pointed test steps and choose the right test equipment to conduct adjustment, otherwise good effect of the unit could not be obtained. Pointed bias voltage value should be ensured during test to get satisfied test result. 2. To adjust the chassis, before installing, you should write mother chip's data into the memory N104 that being installed into this chassis and no any data except this test manual listed are promised to be modified without designer's agreement. 3. Let the unit warm up at least 30 minutes and demagnetize the CRT and cabinet with degaussing coil before testing. Test equipment 1. Oscilloscope 2. Voltmeter 3. Multimeter( Inside resistance: DC20k/V, AC5k/V) 4High Voltmeter 40kV 5. Degaussing Coil 6PHILIPS Pattern Signal Generator (PH5518) IF adjustment 1 Disconnect IF end of RF Tuner. 2 Apply 12V stable power supply to N931(7805) and N933(7805) and N932(7809) input point. 3 Adjust RP121 to the middle position, then swap TV system to PAL D/K with remote control, connect PT5820 to IF input (R101 and C101 joint) and apply 95dB 38.9MHz PAL D/K signal. 4 Connect oscilloscope or digital voltmeter anode to Pin8 of N103, and cathode to GND, adjust IFT T101 with non-inductive rod until the measured point level reading on the voltmeter is 1.60±0.05V.(Core inside IFT) 5. Reconnect IF end of RF tuner after adjustment. HF AGC adjustment 1 Receive signal (U channel) 2 Set input field strength to 60dBV (PAL D/K)gray scale signal. 3Adjust RP120 until C119 anode is just 4.0V±0.1V Factory menu 1. Press MENU button to display the main menu, then press RECALL button five times continuously to enter factory mode. Press 0 button, then RECALL button to exit factory mode. 2. After entering factory mode: Press 1 button to adjust Horizontalincluding H-BLANKHBS0HBST H-POSITIONHPOS H-SIZEH-P0 TRAPEZIUMH-P1 PINCUSIONH-P2 H H H S-CORRECTIONH-P3 H E-W CORNER CORRECTIONH-P4 Press 2 button to adjust Verticalincluding V PHASEOFS HEIGHTV-P1
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V SYMMETRY V-P2 V LINEARITY V-P3 Angle adjustment are also Vertical Bow adjustment. Angle adjustment: no upper adjustment, just switch the lower right and left to adjust. Bow adjustment: no upper adjustment, just switch the lower right and left to adjust. Press 3 buttonSelect some functions Press 4 buttonSelect some functions Press 5 buttonEnter into G2 mode.(This mode is for grid test) Press 6 buttonCheck CUTOFF. Press 7 buttonCheck DRIVE REF. Press 8 buttonSub Brightness/Sub Contrast and Bell volume parameters setting. Press 9 buttonMemory data. 3Press PROG./PROG. to select test item, and VOL+/- button to adjust the value, then press RECALL button to confirm and store. Geometry Distortion adjustment Adjust Geometry Distortion under factory mode with remote control including: V PHASE, V SYMMETRY, V LINEARITY, H PHASE, H SIZE, H PINCUSHION, etc. RECALL must be pressed after every step finishing to store, and the adjustment must be done according to the following order. Use 50Hz Circle Test Card with CENTER CROSS pattern as test signal, then use remote control to enter factory mode. 1) Press 1 button to adjust Hor Blanking Stop/Start until H Blank is just out the screen. 2Vertical Phase adjustment: Press 2 button to adjust VERT Position value until V-center and the screen's geometric center is in accordance. 3V AMPLITUDE adjustment: Select Vert Amplitude item to adjust the vertical amplitude until it is at an appropriate position. 4adjustment, select S-Correction item and adjust it to make the upper and lower picture symmetrical. 5V-Linearity adjustment: Select Vert S-Symmtry item, adjust the value to make the vertical distance from upper edge to middle pattern is equal to the vertical distance from lower edge to middle pattern. 6Press 1 button to adjust horizontal center: Adjust Hor Position item until pattern V-center and the screen's geometric center is in accordance. 7 Select AV mode and use 60Hz Circle Test Card with CENTER CROSS pattern as test signal, then use remote control to enter factory mode and select vertical distortion menu. Adjust 60Hz Geometry Distortion according to steps 16. Repeat steps from 1) to7) until the right value is obtained. Functions for this unit (Select different functions for different models) 1. Enter into factory mode, then press 3 button to select and adjust as the following:
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Contents in factory menu 3 MSP USEDYES Window ModeYes Side AV UsedYes Avout FixedNo Alps usedYes HDEV3 usedNo Fast TuneNo TeleTextYes LanguageAll 6.5M L AUTONO SCARTYES 2. Press button 4select and adjust according to the following order: AUDIO-ONLY:NO TILT ADJUSTMENT:NO SVM ADJUSTMENT: NO REALTIME CLOCK: NO YCbCr: NO SECAM-L:YES AVC:NO Grid/Focus adjustment 1. Set condition is AV mode without signal and enter into factory menu, press 6 button then 5 button to adjust the brightest color line of R, G and B just appears on the screen. Exit the factory menu. 2. Select CROSSHATCH and DOT signal, then set PICTURE to STANDARD mode. 3. Adjust FOCUS to make the picture on the CRT is the clearest. Sub Brightness adjustment Select black and white five circles pattern, set PICTURE to standard mode. Enter into factory menu, then press 8 button to adjust Bright Mid until 8~8.5 gray scale of 10 gray scale appears on the screen. (Recommend value is 25~35). Exit factory menu. White balance adjustment 1 Apply "left black right white" signal for white balance adjustment. 2 Enter into factory menu with remote control, press EQU button to display CCU OFF character. 3 Insert I2C BUS controller plug that is used for automatic adjustment system into XS600 socket on the main board. 4 Run the program. 5 Press SPACE key or press switch on the controller socket, white balance adjustment will be operated automatically. There have three color temperature for you to adjust, if OK, "Click" will be heard. 6 Unplug I2C controller after adjustment finishing, then press CLOCK button on the remote control to restore CCU ON. StandardColor temperature 9300K X=0.284 Y=0.299
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Cold colorColor temperature 12000KX=0.272 Y=0.279 Warm colorColor temperature 6500K X=0.313 Y=0.329 SOUND VOLUME OUTPUT PARAMETER Press SWAP button to enter this submenu, then adjust data such as: VOL 1 VALUE:20 VOL 10 VALUE:80 VOL 40 VALUE:100 VOL 70 VALUE:110 VOL 99 VALUE:120 TELETEXT SETTINGS Press TEX ON and HOLD button to enter the submenu, then adjust the data such as:
Western Europe: English French Swedish Finnish Czech Slovak German Spanish Portuguese Italian Hungarian ADD DATA TTX LAN0 1728 0 TTX LAN1 1729 1 TTX LAN2 1730 2 TTX LAN3 1731 3 TTX LAN4 1732 4 TTX LAN5 1733 5 TTX LAN6 1734 6 TTX LAN7 1735 0 FONT MAP 1736 0 TTX ESC LAN0 1737 0 TTX ESC LAN1 1738 1 TTX ESC LAN2 1739 2 TTX ESC LAN3 1740 3 TTX ESC LAN4 1741 4 TTX ESC LAN5 1742 5 TTX ESC LAN6 1743 6 TTX ESC LAN7 1744 0
Memory check 1. Enter into factory menu, press 8 button to confirm the following settings. CONTRAST MIN 22 CONTRAST MID 70 CONTRAST MAX 85 BRIGHT MIN 0 BRIGHT MID 25 BRIGHT MAX 50 COLOR MIN 0 60 COLOR MID COLOR MAX 80 CVBS-2 YES
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SVHS 2.
NO Press 9 button to check every address data in E2PROM.address=0~511 in memory can not be changed at will and the following data should be right. Same data
data 20 0 0 0 0 68 7 0 0 0 255 0 1 1 0 0 0 1 1 0 0 0 119 0 100 21 40 0 230 0 12 0 3 210 8 49 1 255 0 20 0 53 address 108 109 110 115 116 119 120 127 128 129 130 131 132 133 134 135 144 145 146 147 148 149 150 151 160 161 164 165 166 167 174 175 176 177 178 179 181 184 185 186 200 252 data 1 56 0 50 0 93 0 2 0 1 0 2 0 98 130 2 46 0 36 0 62 0 36 0 56 0 191 14 100 57 70 1 150 0 200 0 0 0 0 0 12 3
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address 13 15 16 17 18 19 20 21 22 23 24 25 32 34 35 36 38 40 42 44 45 46 72 73 76 77 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 101
address 255 256 271 352 360 362 363 366 367 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 392 393 398 399 400 401 402 403 404 405 406 407 410
data 6 1 33 3 0 241 0 225 115 0 25 0 16 63 0 0 32 0 0 0 248 0 248 0 248 0 8 0 24 81 240 0 0 70 0 53 0 8 0 12 0 254 2
address 413 414 415 416 417 418 419 420 421 422 423 424 425 428 429
data 95 0 1 0 80 0 95 96 0 0 31 112 1 130 1
102
1
253
4
411
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Different dataSelect corresponding data according to different model. ATable 1
ADDRESS 37 39 41 43 91 162 163 182 183 190 191 192 271 1754 1755 1756 1757 DATA 131 224 189 165 210 0 254 12 10 150 0 8 33 55 79 65 121
BTable 2 CRT data(data shown as the following is the reference data, if these data has been described in BOM, please see BOM)
ADDRESS 180 187 188 189 DATA 130 7 0 12
Key point voltages Note: Cold ground is regarded as the reference point for these measured data if no any other explanation being made. "-" presents the X Pin of the component(for example: N101-12 th presents The 12 Pin of N101). Transformer voltage
KEY POINT TRANSFORMER 1100xxxx 110±0.5 25.5±1.0
Output voltage 1 groupV C960anode Output voltage 6 groupsV (C965 anode)Sound voltage
FBT Voltage: Tube data the following voltage value are the reference voltage, if the following three data has been described on BOM, please see BOM.
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Filament Voltage (virtual value ) HK 0.845mA 0.1mA
15" PURE FLAT 6.3V±0.25V
27kv±0.5kv <30kv
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BLOCK
DIAGRAM
RF TUNER IF I²C
MSP3410
SAW FILT ER SAW +5V FILT ER SIF I²C
TDA2615
Speaker
+25V
24C16 I²C PIF SIF
IF IC TDA4470
CVBS
UOC VCT3831
R,G,B
CRT BOARD +9V
CR T
+5V AUDIO VIDIO
+9V
+12V -12V
+45V
Vertical circuit STV9302A Horizontal circuit
+9V 5V +B
+5V 9V -12V ~220
+12V +8V +45V
POWER IC STR6753
+B +21V
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