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SKYWORTH core fault bus summary

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SKYWORTH core fault bus summarySKYWORTH core fault bus summary SKYWORTH movement fault bus large collection [reprinted] under the 2010-06-30 22:534.7 T series 4.7.1 TV 3T01, 3T20 configuration table movement, 3T30, 4T01, 4T20, 4T30, 4T36, 5T03, 5T10, 5T20, 5T21, 5T25, 5T30, 5T36, 6T18, 6T...

SKYWORTH core fault bus summary
SKYWORTH core fault bus summary SKYWORTH movement fault bus large collection [reprinted] under the 2010-06-30 22:534.7 T series 4.7.1 TV 3T01, 3T20 configuration table movement, 3T30, 4T01, 4T20, 4T30, 4T36, 5T03, 5T10, 5T20, 5T21, 5T25, 5T30, 5T36, 6T18, 6T30 ICCPU:TMP87C38; small signal processing: TB1238 or TB1240CPU+TV:TMPA8803, TMPA8807, TMPA8809 or TMPA8829 type 6000 series 8000-2199, 8000-2199A, STV2140, 21TR9000, 21TMMS, 21NFMK, 8000T series, 8000F series, 8000A series, 25TM-9000, 25I9000, 25TI9000, 29T66AA, 29SP-9000, 2140NK, 2528, 2582, 2599, 2928, 2929, 2981, 2522MK, 25TA series, 25ND series, 25NF series, 29TA series, 29TF, 25T66AA, 29TM9000, 29S19000, 29SP9000, 29NL9000, 34T68AA The 4.7.2 bus adjusts the volume to the minimum (00), holds the VOL- key on the machine panel, and enters the S mode by pressing the screen key on the remote control. At this point, the S character appears in the upper right corner of the screen. Repeat the steps above to enter the D mode, where the "D" character appears in the upper right corner of the screen. Press channel + / select item, press volume + / / key to change parameters, press number to select debug item. Press the standby button to exit the D mode. key The 4.7.3 bus fault phenomenon: 1 to normal, flyback lines appear blue screen. Maintenance Tips: enter the S maintenance status, repeat the above operation, enter the factory D status, call up the function, and set the project data to check. Change the VM1 data to the normal value "00". Exit D maintenance mode, flyback line disappear blue screen, troubleshooting. Fault phenomenon 2:8000-2199 color TV, no picture silent, but has character display. Maintenance Tips: enter the maintenance mode of S, according to the program + / - button to view the adjustment project data is normal; and then enter D mode, check and adjust the project data, found that VM2 data from normal error, "04" to "70", with the volume + / - key data of the project will be adjusted to 04 ". The TV will return to normal and quit maintenance. Fault phenomenon: 3:4T01 movement, color TV, two times after the boot, no picture silent, but the screen has characters to display, the menu will be set off after the blue screen. There is sound without light. Enter the AV signal is the case. Maintenance Tips: enter the maintenance S status, press the number key "9", enter the fault self inspection display, the screen shows the SYNC project is NG, normally OK. Repeat the above operation into the factory in the state of S D, access to project data according to the program + / - button, VM2 (video mode) data and the manufacturer does not correspond to the data, the data is "70", press the volume + / - key data will be changed to the normal value of "04" after the exit of state maintenance. Receive TV and enter AV, images and audio return to normal. Fault phenomenon: 4:TB1238 movement, color TV, after the boot is a dark blue screen, press the panel or any key on the remote controller are shut down. Maintenance Tips: replace the memory. Fault phenomenon, 5:5T10 movement, color TV, can not show 241 to 255 channels, re search after normal, but after AC shutdown, then boot, the fault is still. Check hint: replace with new memory (24C08). 4.7.4 hardware fault common problem Fault phenomenon: 1:4T01 movement, color TV, in the AV state, sometimes automatically converted to TV state, two or three seconds later into the AV state. Overhaul tips: ZD204 (5.1V) to 4.7V / 0.5W voltage regulator, or R040 and R042 are changed to 5.6k. Fault phenomenon, 2:4T01 movement, color TV, vulnerable R621 (150k / 1W). Overhaul hint: increase the resistance power to 2W. Malfunction, 3:4T01 movement, color TV, low frequency end (central one), sound distortion. Maintenance prompt: a 47pF capacitor is connected between R318 and C132, and a 12uH inductor is connected to the neutral of the two capacitor, and the C132 is changed to 47pF. Fault phenomenon, 4:8000T-2122, 2199 type machine (4T01 movement), receive strong signals in the central 1 and 8 when the noise is large. Maintenance Tips: (1) R138 (270) on the right side of a high pass filter circuit, capacitance inductance 47pF, 10uH[is actually C132 (100pF) to 47pF, the other on a 47pF capacitor, and then in two of a capacitor and inductor 10uH]; (2) on the R105, R106. Fault phenomenon: 5:4T20 movement, color TV, when receiving strong signal, there is reticular interference. Maintenance Tips: 5200-380W08-00 replacement procedures with 5200-380W08-00 Panasonic tuner. The fault phenomenon of color TV 6:4T20, intermittent sound. Maintenance Tips: C118 to 0.01uF ceramic capacitors, with C119, remove the L109; if the frequency offset is caused by no sound, check the reliability and in weeks L204, C235 tuner, C236; if the local modulation signal is too low (not GB), the sound frequency electric road C257 connected to the TB1238 terminal is disconnected with emitter follower circuit, transistor 2SC1815, C to +9V power, e through 10nF ceramic capacitor connected to the TB1238 port, B upper and lower bias resistors are 10K, e by 1K resistance grounding. Fault phenomenon: 7:5T20 movement, color TV, bright spot flashing after starting, but without grating. Overhaul hint: change the jumper of short circuit R413 and R643 to 15 / 0.25W resistor. Fault phenomenon, 8:5120 movement, color TV, line non synchronization. Overhaul hint: change C227 to 0.01uF / 100V polyester capacitor. Malfunction, 9:5T20 movement, color TV, character jitter. Troubleshooting tips: change C021 from 39pF to 33pF. Fault phenomenon, 10:5T20 movement, color TV, TV, no image, AV normal. Maintenance Tips: C240 damage, C240 by ceramic capacitors instead of polyester capacitors, capacitance constant. Fault phenomenon 11:53, 20 movement, color TV, pincushion distortion. Maintenance prompt: C309 (2.2uF / 250V) is easy to damage, change C309 to 4.7uF / 50V non-polar capacitor Malfunction, 12:5T20 movement, color TV, AV status, images have ghosting. Inspection tips: check the AV signal line; enter the factory mode and set the SV item to 20. Fault phenomenon, 13:5T20 movement, color TV, blue screen flashing. Overhaul hint: change the size of the decoder block IC201 (TB1240) 48, pin external resistance R226 (1K) and capacitance C235 (0.1uF) and C236 (100pF). If it is not valid, connect a 2.2k resistor between the 48 foot of the IC201 and the ground. Fault phenomenon 14:29TM9000 type machine (5T21 movement), input DVD machine Y, u and V signals, color light. Overhaul hints: R161 and R162 on the AV board will be changed to 20 / 0.25W. Fault phenomenon, 15:5T21 movement, color TV, often appear "BUS OFF" word, then automatically shut down. Maintenance tip: R307 (10K) on the CPU-35 foot patch. Malfunction. Super receiver CPU in 16:3T20 movement is liable to damage. Maintenance Tips: change the CPU of the 3T20 common machine and change the MODE data from 00 to 01. Fault phenomenon, 17:3T20 movement, color TV, strong signal, large mesh interference. Maintenance Tips: for Panasonic tuner. Malfunction, 18:8000-2122, 21NF9000 (3T20 movement), the sound set "0" or mute, there is still a loud speaker in the exchange of sound. Inspection hints: add a shielding line, shielding line from the circuit board H to D points, and check the power amplifier circuit. Fault phenomenon 19:8000-2198 type machine (3T20 movement), prone to horizontal bright line fault. Overhaul hint: change R316 to 0.33 / 2W. Fault phenomenon 20:29NL9000 type machine (3T20 movement), when inputting S terminal signal, the image is irregular and asynchronous. Maintenance Tips: S terminal bad grounding wire can be welded, solid. Fault phenomenon: 21:3T20 movement, color TV, narrow range. Maintenance Tips: change C308 (0.09uF / 250V) to 0.47uF / 250V. Fault phenomenon: 22:3T20 movement, color TV, sometimes horizontal bright line appears after power on. Overhaul hint: change R315 to 5.1k / 5W metal film resistor, remove R518 at the same time. Malfunction, 23:3T20 movement, color TV, sound in the noise (this phenomenon in the 4T01, 5T20 movement may occur). Inspection hints: (1) connect the ground of the sound IC401 to the part of the line; change the metal shell to the acoustic surface filter; and disconnect the IC103 (CD4052). Then connect the shield line to the input of the C257. Fault phenomenon, 24:5T10 movement, color tv. When the chiller is switched on, the field is jitter and compressed. The following points are as follows: (1) short jumper C220 (or C309), then C303 negative pole, and the 1000pF / 50V capacitor on both ends of the R218. (II) a conductor between the heat sink and the ground is placed on the circuit board, and the wire is placed on the circuit board. If the above method is invalid, replace the STV9306. Malfunction phenomenon 25:29SF8800 type machine (5T10 movement), character shake when starting, changing or adjusting items. Maintenance tip: add 1000pF capacitor to the C pole of Q801, and change the capacitance between C and B poles to 3300pF. Fault phenomenon 26:29SF8800 type machine (5T10 movement) character jitter. Maintenance instructions: connect the 1000pF capacitor on the R218 and connect a wire between the ground of C330 and C202 to reduce the distributed capacitance. Malfunction phenomenon 27:29TF8000 type machine (5T10 movement), repeated firing block STV9306. Maintenance prompt: replacing STV9306; changing R322 to 1K / 0.25W; at the ends of C314 and a 15V / 0.25W regulator tube; positive grounding. Malfunction phenomenon: 28:29TF8800 type machine (5T10 movement) has reticulate interference and dark strip. Maintenance Tips: change TDA9808 17 feet (VIF AGC) capacitance, and a jumper between tuner and a high pressure pack. Malfunction phenomenon 29:29SF8800 type machine (5T10 movement). Watch TV programs, open the surround sound speaker function, have fractured. It has nothing to do with the volume size. Overhaul hints: change C41 1 or C413 to 470uF; C427 or C428 to 0.01uF. Fault phenomenon 30:2522MK type color TV (5T10 movement), character jitter. Maintenance Tips: change the resistance R231 (1K) on the main board to jumper. Fault phenomenon 31:25TF8000 type machine (5T10 movement), 47V regulator tube is vulnerable, so as to appear pincushion distortion fault. Overhaul hints: appropriately increase the C318 capacity to reduce the reverse voltage drop and current of the regulator D309. Fault phenomenon 32:3T30 / 3T36 movement, color TV, cooler boot difficult, once the boot, then everything is normal. Maintenance instruction: the performance of D605 and D606 in the positive feedback branch of the switching power supply is not good, as shown in figure 4-4. It is recommended for fast recovery diode FR107. Fig. 4-4 positive feedback circuit Fault phenomenon, 33:3T30 / 3T36 movement, color TV, +B voltage (+110V), up to +160V. Maintenance tip: as the pulse width modulation capacitor C610 (22uF / 50V) is very close to the heat sink of the switch tube, it is easy to lose capacity, thus shortening the cut-off time of the switch tube and increasing the +B voltage. Fault phenomenon 34:T series color TV set. The indicator light is on. No boot. Check prompt: the C616 has +110V voltage, and the CPU standby control terminal voltage is normal. This fault is mostly R621 (150k / 0.5W) open circuit. After the R621 is open, the standby control tube Q607 cannot work because of loss of power. As the original machine R621 using less resistance, easy to open circuit, it is recommended to replace the 1W metal film resistor. Fault phenomenon, 35:3T36, 4T36, 5T36 movement, color TV, TV, AV status are no images. Maintenance Tips: if the measured super TMPA8803 chip (8823) or TMPA8809 (8829) 62 foot line sync pulse input, the peripheral circuit of the parts are: 3T36 core in C284 (27pF), 4T36 C221 (27pF) in movement, movement of 5T36 C016 (120pF). In addition, after the data in memory error, it is also prone to this fault. Malfunction, 36:4T36 movement, colour TV, automatic shutdown. Maintenance prompt: IC101 reset terminal, foot external capacitor C011 (0.01uF) leakage, new change can be. Fault phenomenon 37:29T66AA color TV (5T36 movement), heat engine rear field jitter, compression. Overhaul tips: IC201 (TMPA8829) 15 feet external tantalum capacitor C210 (0.47uF / 50V) polarity installed, the reverse after troubleshooting. 4.8 Y series 4.8. 1 color configuration list of 3Y01, 3Y20, 4Y014Y21, core 5Y21, 5Y30, 5Y31 ICCPU:LC863348: a small signal processing circuit: LA76810CPU:LC863320 / A or LC863324: a small signal processing circuit: LA76828, 21ND9000, 14NS9000 or LA76832 models 21NF8000, 21N19000, 21PD9000, 21PS9000, 25NF8000, 8000Y-1422MK, 8000Y-2122, 8000Y-2188MK, 8000Y-2198, 8000Y-219921N19000, 29SF9000, 29SH8000, 25NX9000, 29TX9000, 29T63AA, 29TX 1.3Y01, 4.8.2 bus, 4Y01 movement adjustment method 3Y20 (1) press the menu button of the remote control (MENU) two times, enter the image menu; (2) followed by the alternate key (Q-VIEW) and mute keys (MUTE) to enter the bus; (3) according to the timing key (TIME) switch factory menu, press the menu the key to exit (MENU). The 2.4Y21, 5Y21, 5Y30, 5Y31 movement press down the menu key on the key board, and then press the 1, 5 and 9 keys of the remote control to enter the bus. Enter LA76832 SERVICE MENU 00, change PROG ON item data from 1 to 0, and press the remote control menu key to quit factory mode. 4.8.3 bus fault phenomenon, 1:3Y20 / 4Y01 movement, color TV, image dim or no image, display white square test signal. Maintenance Tips: enter the state maintenance, project data PATTERN image test selection check in the MENUl menu; data for the output signals of the 1 white field "," data output gray field signal data is "2", the output of the black field signal 3, data for the output signal of the 4 field character "PATTERN, the project data to" 0 ", from the image test condition. Malfunction, 2:3Y20 movement, color TV, super receiver function loss, band control confusion. Maintenance tip: check the function settings menu OPTION, select the TUN TYPE Project menu, its original value is "0", the data is related to the band voltage. Change the TUN TYPE project data to "2". 4.8.4 hardware fault common problem Malfunction phenomenon: 1:21NF8800 type machine (4Y01 movement), the signal does not stop at regular intervals, but it changes back to normal after changing stage. Check prompt: connect 3K resistor on L203, change R007 to 100k, change C016 to 0.022uF / 50V. Fault phenomenon 2:8000Y-2108 type machine (4Y01 movement), there is cross stripe interference on the image. Maintenance tip: replace the power switch and remove the two jumpers at the SW601. Fault phenomenon 3:2122 model (4Y01 movement), there is a high frequency whistling sound in the sound, and it increases with the volume. Maintenance tip: add a 2.2uF / 16V capacitor to the IC402 (LA4285) pin to ground. Fault phenomenon, 4:3Y01 movement, color TV, LA76810 damage, resulting in AV no image. Maintenance tip: after replacing the IC, add a 9.1V zener diode between the AV input of LA76810 and the ground. Fault phenomenon, 5:3Y01 movement, color tv. Automatic switchover of AV / TV. Overhaul tips: the regulator tube ZD204 (5.1V) changed to 4.7V. Fault phenomenon, 6:3Y01 movement, color TV, occasionally blue screen. Maintenance Tips: the decoder (AFT OUT) and the foot external resistance R007 (47K) to 100k; AGC to 10UF tuner capacitor C104 / 50V: pre discharge pipe B on partial resistance R107 to 3.6k / 0.25W; VCO L203 and 3K in peripheral resistance (0.1uF) to C016; 0.022uF; R111 to 1K / 0.25W; R110 to 47 ohm / 0.25W; R109 / 0.25W to 180. After the changes, reset the RF AGC values. The fault phenomenon of 7:8000Y-2122 type machine (3Y01 machine), Si} difference menu. Troubleshooting tips: remove Q636, C636, ZD636, J636, R636, and increase IC601 (L7805E). Fault phenomenon 8:21 inch flat screen TV 3Y01 movement. Sound volume jump. Maintenance tip: add a 22nF capacitor to the B, e, and Q004 poles. Fault phenomenon, 9:3Y01 movement, color TV, remote control shutdown has bright spot. Overhaul hint: change R518 (100) to 1K resistor. Fault phenomenon, 10:3Y01 movement, color tv, After a shutdown 5S horn "thump" sound. Maintenance Tips: audio power amplifier LA4285 to a 4.7K foot to ground resistance. Malfunction, 11:3Y01 movement, color TV, volume 1-3 silent, at 3~4 when the volume jump larger. Overhaul hint: change R014 (7.5K) to 3.9k / 0.25W. Fault phenomenon, 12:3Y01 movement, color TV, sound in the noise, blue screen flashing. Overhaul hint: change Rl22 (390n) to 1.8 / 0.25W, and C303 (100uF / 16V) to 100uF / 25V. Fault phenomenon, 13:3Y01 movement, color TV, shutdown has bright spot. 110 overhaul tips: change R518 (120) to 270 -1k / 0.25W. Fault phenomenon, 14:3Y01 movement, color TV, AV state, blue screen dissatisfied edge. Overhaul hint: change R044 to 5.6k / 0.25W. Fault phenomenon: 15:3Y01 movement, color TV, black screen, but with characters and accompanying sound. Maintenance Tips: change the new version of CPU can be. Fault phenomenon: 16:3Y01 movement, color TV, TV has high frequency whistling sound, and changes with the volume size. Overhaul tips: change the C443 and C204 to 0.33uF polyester capacitors. Fault phenomenon: 17:3Y01 movement, color TV, individual image, upper distortion. Overhaul hints: 4.7K and 51 ohm precision resistors are connected in series to replace R227 (4.8k / 0.25W). Fault phenomenon, 18:5Y30 movement, color TV, repeated firing, output block LA7840, LA7841. Maintenance tip: in the part of the movement of color TV, the field output IC, foot external capacitor C602 quality is poor, easy to breakdown, and accompanied by R602 circuit breaker, as shown in figure 4-5. Fig. 4-5 field output circuit Malfunction phenomenon: 19:5Y30, 5Y21 movement, color TV, image dilation around right and left. Check indication: the peak absorption capacitance of the switch is C909 (2.2nF) leakage. When replacing, we should choose 2000 ~ 4700pF / 2kV high quality capacitor. Malfunction phenomenon, 20:5Y30 movement, color TV, running table. Inspection tips: cut copper foil covered with white paint between R010 and R012, and connect with wire. The fault phenomenon of 21:21N5D TV (Y Series), the cooler when the image sound normal, after the engine timing blue screen, no map display standard pattern are silent. Maintenance Tips: the original bad performance tuner. This machine is not commonly used in the TDQ-384 type tuner foot type ET-5SHIE-CV302 tuner, but the foot without AFC feet narrow shell tuner. This machine is available TDC-3T10-470 all added tuner for substitution, first will supplement the heads of the feet with the wire as shown in Figure 4-6 corresponds with the good welding circuit board into the hole, and in addition the head of the AFC 47K two foot access resistance. A resistor connected to 12V, the other end connected with a resistor, and the addition of high ground, then fixed, check and correct, then power test machine. Remote control 4.9 digital 4-6 tuner 100 movement diagram wiring diagram of open user, in the factory pattern is a conductive pad adjustment button, press this button will appear six sub menu: Item 1: work status display of main IC on the whole machine; Second: linear adjustment of field; The third item: linear adjustment; Fourth: analog adjustment; The fifth item: white balance adjustment; The sixth item: function settings. After entering the submenu, select the key according to the channel key, change the value by pressing the volume key, and press the TV / AV key to exit the factory debugging state. 4.10, CRT rear projection movement, with the factory remote control 22C key or user remote control of the bottom right corner of the key to enter the menu, the CHIP-IO is set to 1116, NUM is set to 1, READ is set to 0K, you can enter. Press the channel + / / key option to adjust the parameters by volume + / / key. Press 22C again, or return to main menu, change AFC to "X", can quit
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