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Troubleshooting
Related Manuals for XOCECO LC15YS031
Summary of Contents for XOCECO LC15YS031
- Page 1 LCD TELEVISION LC15YS031 (LC-15Y3)
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Page 2: Table Of Contents
CONTENTS Safety instructions………………………………………………………………………..… Adjustment instruction …………………………….…….…………………………….… Trouble shooting ……………………………………………………….…………………… Method of software upgrading ………………………………………….…….…………… LC-Y# series working principle analysis……………………………….………….…………. Block diagram…………………………………..………………………………..………… IC block diagram………………………………………………………………………..…… Main assembly……………………………………………………………………………..… Identification criteria for the bright spot and dark spot of the LCD screen………..…. Wiring diagram ……………………………………………………………..……………... Troubleshooting charts………………………………………………………………..……... -
Page 3: Safety Instructions
This service manual is only for service personnel to take reference with. Before Attention: servicing please read the following points carefully. Safety instructions 1. Instructions Be sure to switch off the power supply before replacing or welding any components inserting/plugging in connection wire Anti static measures to be taken (throughout the entire production process!): a) Do not touch here and there by hand at will;... - Page 4 would be unable to work and no way to get it repaired. 2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.
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Page 5: Adjustment Instruction
Alignment instruction 1 Alignment equipment PM5518 (video signal generator) K-7253 (VGA signal generator) CA210 (white balancer) IF signal generator Signal generator Oscillograph 2 Alignment flow-chart The alignment flow-chart is shown as fig-1 Write memory N300 and N400 To produce main board and power supply board Check power supply board and main adjustment All testing Connect with central signal source, then check each function of TV(Station... - Page 6 SYSTEM) for X210, input 9v(±0.05v) and 5v(±0.05v) to J202 and J203, adjust L210 to let x205 voltage to be 1.65v(±0.1v). b. Solder to J201, J202, J203 and J5 3.3.2 AGC adjustment Receiving 60dB signal of D-8 or A-7(N system), adjust RP201 to let 3v(±0.05v) of X204. Input 100dB of antenna, the picture should not no-sync and distortion.
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Page 7: Trouble Shooting
Table 1 Display Format of PC Item Picture element clock H-SYNC V-SYNC Resolution Remark (MHz) (kHz) (Hz) 640 x 480 @ 60 25.175 31.469 59.900 800 x 600 @ 60 40.000 37.879 60.317 1024 x 768 @ 60 65.000 48.363 60.004 1024 x 768 @ 70 56.48... - Page 8 Unable to switch the power on Check to see if the power plug has been inserted properly into the socket. No picture and sound Check to see if the power supply of liquid crystal TV has been switched on. ( as can be indicated by the red LED at the front of the TV set) See if it’s receiving the signal that is transmitted from other source than the station...
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Page 9: Method Of Software Upgrading
Blur picture Check if the antenna cable is correctly connected. Of if it has received the right video signal. No sound Check if the “mute” audio frequency setting is selected. Check if the sound volume is set to minimum. Make sure the earphone is not connected. Check if the cable connection is loose. - Page 10 Properly set the path of RAMWrite "C:\isp_fastflash\Isp_parallel\TEMP_OBJECT\isptemp_ parallel.hex" and FastFlashWrite "C:\isp_fastflash\20y25.hex", save them and close. 4. Set the LCD to off. Connect the Y# updating board and PC with parallel cable. 5. Connect the VGA MONITOR interface on the Y# updating board with the VGA cable, connect the other end to the VGA interface of the LCD.
- Page 11 Click the item of Parallel: Set Clock to 120000 Hz. 8. Click Batch, Select the path of the File: bat.txt Select bat.txt and click to open it: Click “OK” to start the process of burning the program. The following screen appears when the process if finished.
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Page 12: Lc-Y# Series Working Principle Analysis
LC-Y# series working principle analysis For the PAL system, when the RF signal is input to the tuner, the turner generates IF signal. Then the IF signal goes through the pre-amplifying circuit and 38M SAW, the VIF signal and 1ST_SIF signal will be generated. -
Page 13: Block Diagram
BLOCK DIAGRAM... -
Page 14: Ic Block Diagram
As follows we are going to introduce the inner IC block diagram and function. 1. Inner block diagram of M52760 IF signal processing IC (AFT, QIF, VIDEO OUT) Descriptions of the pins: Description Description 4, 5 VIF input QIF OUT 1ST_SIF input AUDIO OUT VIDEO OUT... - Page 15 2. Inner block diagram of LA72700 stereo decoder Descriptions of the pins: Pin name Connections Pin name Connections PCSTFILT VCO PLL filter IIC data input PCPLDET Driving level test IIC clock input PISIF SIF signal test PCALCFIL ALC filter 25/26 R/L OUT TVF_R/L output SIF DEMOD SIF demodulator...
- Page 16 Descriptions of the pins of R2S15900SP Function Function 2, 7 Left/right input for Channel 1 17, 18 SDA, SCL 3, 26 Left/right input for Channel 2 4, 25 Left/right input for Channel 3 11, 19 LOUT, ROUT 4. Inner block diagram of AN5277 audio amplifier with single end and double channels...
- Page 17 5. Inner block diagram of TPA1517 6W stereo audio amplifier 6. Inner block diagram of FLI8125 digital video processing IC...
- Page 18 The descriptions of the pins of FLI8125IC Pin name Connections Pin name Connections KEYA Key A S-video terminal identification KEYB Key B Pulse width adjustment AUD_SEL_1 RESETn Reset AUD_SEL_2 XTAL Resonator PBIAS Panel’s oblique line control output TCLK Basic clock PPWR Backlight adjustment SCL_RS232...
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Page 19: Main Assembly
Main assembly LC-15Y3 LC-20Y15 hanging assy 535-L20H15-00 stand 615-10435-00 615-10483-03 (DZ-0615) (DZ-2020) Speaker assy 615-20448-00 Main board 667-L15Y3-01 667-LPY25-01 Power board 667-L15Y3-20 667-L20Y15-20 receiving 667-L15Y3-09 667-L20Y15-09 board Button board 667-L15Y3-05 667-L20Y15-05 Back light 667-L15H3-14C 667-L20H3-14A board panel 335-15118-00 (M15X3-L04) 335-2000F-00 (V201V1-T01) Identification criteria for the bright spot and dark spot of the LCD screen Q’ty allowed Distance between two spots... -
Page 20: Wiring Diagram
Wiring diagram... -
Page 21: Troubleshooting Charts
Troubleshooting charts This series models adopt built-in power. The power to the main board may be different when the unit adopts different panels or whether the audio amplifier is located on the main board or not. The following is the detailed power in different cases. Power socket Model... - Page 22 2. With picture and without sound when turning on: Check if the no sound channel from the Increase volume; signal input to sound processing IC check whether every IC15900 is normal channel has no sound Check whether the signal 15900(IC) or peripheral circuit output by 15900(IC) is does not work normally normal...
- Page 23 5. Check flow of the power board: Replace the fuse and check Power board damages Replace N501, D501 whether N901, D501 or fuse blows breakdown Check whether C512 has 18V Replace D502 Check whether pin1 of N501 has wave Check whether N502 is damaged Replace N502 Check whether N505, D507 is Check whether N505 is...
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Page 24: Exploded View
Exploded views LC-15Y3... - Page 25 PART LIST OF EXPLODED VIEW DESCRIPTION PART# Nameplate 881-63190-39 Transfer axis cover 808-10609-120 Screw 851-14010-56 Back cover 780-11019P124 Button baffle 743-10132-01 Button 667-L15Y3-05 Screw 852-33005-81 Screw 851-33008-51 Speaker 384-30308-D0 IR receiver board 667-L15Y3-09 LED column 700-60188-100 LOGO no number(silk screen) Front cover 780-11018J0G5 LCD panel...
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Page 26: Part List
PART LIST PART# DESCRIPTION LOCA.NO. 203-L15Y30-25 LC-15YS031 BRAND PRIMA,N-M,CUL, 100-L15Y30-01 LC-15Y3 07 SL15Y30-23A10 SOFTWARE SVA PANEL N401 SL20Y190-02B10 SOFTWARE DDC N104 364-41215-00 ANTENNA SOCKET NF-6 384-30308-D0 SPEAKER YDT4070 3W 8Ω 459-2410R-002 CERAMIC CAPACITOR DD308-63F104Z50 491-5521J-02 POWER CORD UL 655-4E301-118 (4-PINS) LEAD WITH HOUSING 655-44301-32 (4-PINS) LEAD WITH HOUSING 655-44302-31... - Page 27 881-60085 BLANK WARNING LABEL 887-20171-00 PALSTIC BAG 70-500-0.06 887-21074-00 PALSTIC BAG (100X230) 887-21135-02 CLASPER PALSTIC BAG 230X330X0.1 335-15120-00 DISPLAY SCREEN SVA 150XG04TB 488-10012-00 BATTERY 7# ENGLISH 604-L15Y37-04 OWNER'S MANUAL(PRIMA CAN/SVA PANEL ) 665-D0002-421 VIDEO LINE BLUE GREEN RED 665-D0002-422 VIDEO LINE YELLOW WHITE RED 803-1I128-00B LCD SCREEN FRAME 803-30202-00...
- Page 28 352-52760-10 IC M52760SP N201 364-11212-00 EARPHONE JACK ST-112 X101 364-11212-00 EARPHONE JACK ST-112 X103 364-34101-00 4-PINS CONNECTORS TJC3-04A X302 364-34101-00 4-PINS CONNECTORS TJC3-04A X401 364-34186-00 4-PINS CONNECTORS TJC10-4AWT X402 364-36101-00 6-PINS CONNECTORS TJC3-06A X701 364-91202-00 S-VIDEO TERMINAL CKX5-2K-2 X105 364-91204-00 VGA SOCKET 105 PIN 3 ROW HORIZONTAL ( 阴) X106 364-93219-00...
- Page 29 342-08470-90 SMD TRANSISTOR BC847AW V304 342-08470-90 SMD TRANSISTOR BC847AW V305 342-08470-90 SMD TRANSISTOR BC847AW V312 342-08470-90 SMD TRANSISTOR BC847AW V701 342-08470-90 SMD TRANSISTOR BC847AW V702 342-08470-90 SMD TRANSISTOR BC847AW V703 342-08470-90 SMD TRANSISTOR BC847AW V705 342-08470-90 SMD TRANSISTOR BC847AW V401 342-08470-90 SMD TRANSISTOR BC847AW V216...
- Page 30 455-12020-H0 SMD RESISTOR FTR0603200JR R406 455-12020-H0 SMD RESISTOR FTR0603200JR R407 455-12020-H0 SMD RESISTOR FTR0603200JR R408 455-12020-H0 SMD RESISTOR FTR0603200JR R409 455-12020-H0 SMD RESISTOR FTR0603200JR R410 455-12020-H0 SMD RESISTOR FTR0603200JR R411 455-12020-H0 SMD RESISTOR FTR0603200JR R412 455-12020-H0 SMD RESISTOR FTR0603200JR R413 455-12022-H0 SMD RESISTOR FTR0603220JR R201...
- Page 31 455-12110-H0 SMD RESISTOR FTR0603101JR R460 455-12110-H0 SMD RESISTOR FTR0603101JR R461 455-12115-H0 SMD RESISTOR FTR0603151JR R210 455-12115-H0 SMD RESISTOR FTR0603151JR 455-12122-H0 SMD RESISTOR FTR0603221JR R249 455-12133-H0 SMD RESISTOR FTR0603331JR R141 455-12133-H0 SMD RESISTOR FTR0603331JR R142 455-12133-H0 SMD RESISTOR FTR0603331JR R143 455-12133-H0 SMD RESISTOR FTR0603331JR R256 455-12133-H0...
- Page 32 455-12247-H0 SMD RESISTOR FTR0603472JR R424 455-12247-H0 SMD RESISTOR FTR0603472JR R425 455-12251-H0 SMD RESISTOR FTR0603512JR R306 455-12251-H0 SMD RESISTOR FTR0603512JR R313 455-12251-H0 SMD RESISTOR FTR0603512JR R317 455-12268-H0 SMD RESISTOR FTR0603682JR R135 455-12268-H0 SMD RESISTOR FTR0603682JR R137 455-12268-H0 SMD RESISTOR FTR0603682JR R139 455-12268-H0 SMD RESISTOR FTR0603682JR R314...
- Page 33 455-12343-H0 SMD RESISTOR FTR0603433JR R237 455-12347-H0 SMD RESISTOR FTR0603473JR R106 455-12347-H0 SMD RESISTOR FTR0603473JR R107 455-12347-H0 SMD RESISTOR FTR0603473JR R120 455-12347-H0 SMD RESISTOR FTR0603473JR R121 455-12347-H0 SMD RESISTOR FTR0603473JR R122 455-12347-H0 SMD RESISTOR FTR0603473JR R123 455-12347-H0 SMD RESISTOR FTR0603473JR R310 455-12347-H0 SMD RESISTOR FTR0603473JR R324...
- Page 34 456-2368K-B1 *SMD CAPACITOR 06032R683K250BA C346 456-2368K-B1 *SMD CAPACITOR 06032R683K250BA C347 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C115 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C117 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C118 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C119 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C120 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C202 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C204...
- Page 35 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C434 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C435 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C436 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C437 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C441 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C444 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C445 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C446 456-2410M-C1 SMD CAPACITOR 06032E104M250BA C447...
- Page 36 456-2447R-C1 SMD CAPACITOR 06032E474Z250BA C361 456-2510R-C1 SMD CAPACITOR 06032E105Z250BA C333 456-3002C-11 SMD CAPACITOR 0603CG020C500BA C229 456-3027H-11 SMD CAPACITOR 0603CG270J500BA C328 456-3027H-11 SMD CAPACITOR 0603CG270J500BA 456-3033H-11 SMD CAPACITOR C1608CH1H330JT C438 456-3033H-11 SMD CAPACITOR C1608CH1H330JT C439 456-3082H-11 SMD CAPACITOR C1608CH1H820JT C227 456-3110H-11 SMD CAPACITOR C1608CH1H101JT C440 456-3118H-11...
- Page 37 464-6D710-M02 ELECTROLYTIC CAPACITOR CD110-16V-100uF-M C330 464-6D722-M02 ELECTROLYTIC CAPACITOR CD110-16V-220uF-M C442 464-6D747-M02 ELECTROLYTIC CAPACITOR CD110-16V-470uF-M C230 464-6D747-M02 ELECTROLYTIC CAPACITOR CD110-16V-470uF-M C725 464-6E710-M02 ELECTROLYTIC CAPACITOR CD110-25V-100uF-M C235 464-6E710-M02 ELECTROLYTIC CAPACITOR CD110-25V-100uF-M C703 464-6E710-M02 ELECTROLYTIC CAPACITOR CD110-25V-100uF-M C704 464-6E710-M02 ELECTROLYTIC CAPACITOR CD110-25V-100uF-M C705 464-6E710-M02 ELECTROLYTIC CAPACITOR CD110-25V-100uF-M C213...
- Page 38 667-L15Y3-05 KEY BOARD ASS'Y 667-L15Y3-05\ KEY BOARD ASS'Y (MANUAL INSERTION ) 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S901 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S902 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S903 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S904 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S905 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B S906 360-10001-00 TACT SWITCH KFC-A06-4X4.5X5B...
- Page 39 459-6147K-00 CERAMIC CAPACITOR DE0705B471K1k C509 459-6210K-00 CERAMIC CAPACITOR DE0705B102K1K C505 459-8147K-00 CERAMIC CAPACITOR DE0707B471K2K C513 462-2B410-M0V POLYESTER CAPACITOR 250VAC-0.1uF-M C519 462-2B410-M0V POLYESTER CAPACITOR 250VAC-0.1uF-M C507 462-2B410-M0V POLYESTER CAPACITOR 250VAC-0.1uF-M C504 464-D7710-M0G ELECTROLYTIC CAPACITOR CD288H-400V-100uF-M C503 464-R0647-T0 ELECTROLYTIC CAPACITOR CD110HR-50V-47uF-T C508 464-6E833-M0 ELECTROLYTIC CAPACITOR CD110-25V-3300uF-M C506...
- Page 40 467-1C215-H03 CARBON RESISTOR 1/6W-1.5K-J R508 467-1C236-H03 CARBON RESISTOR 1/6W-3.6K-J R521 467-1C310-H03 CARBON RESISTOR 1/6W-10K-J R522 467-1C456-H03 CARBON RESISTOR 1/6W-560K-J R513 782-L15Y3-2000 POWER PCB JUMPER WIRE J501 667-L15Y3E-14 INVERTER BOARD ASS'Y 364-361AY-00 6-PINS CONNECTORS TJC10-06A 459-9022H-00 CERAMIC CAPACITOR CC45SC3FD220JYNN 459-9022H-00 CERAMIC CAPACITOR CC45SC3FD220JYNN 464-6F722-M0 ELECTROLYTIC CAPACITOR CD110-35V-220uF-M 340-00289-00...
- Page 41 456-2410M-C1 SMD CAPACITOR 06032E104M250BA 456-2422M-C1 SMD CAPACITOR 06032E224M250BA 456-3122H-11 SMD CAPACITOR 0603CG221J500BA 456-3222H-11 SMD CAPACITOR 0603CG222J500BA 456-3222H-11 SMD CAPACITOR 0603CG222J500BA 456-3222H-11 SMD CAPACITOR 0603CG222J500BA 456-3222H-11 SMD CAPACITOR 0603CG222J500BA 456-3247H-11 SMD CAPACITOR 0603CG472J500BA 456-3347H-11 SMD CAPACITOR 0603CG473J500BA 456-3347H-11 SMD CAPACITOR 0603CG473J500BA 456-3347H-11 SMD CAPACITOR 0603CG473J500BA 470-00412-00...