《组装电视机维修（Assembly TV repair）》由会员分享，可在线阅读，更多相关《组装电视机维修（Assembly TV repair）（18页珍藏版）》请在金锄头文库上搜索。
1、组装电视机维修（Assembly TV repair）Assembling TV maintenance experience1, CPU LC863532A 5Z00 1ZR0, the boot screen appears the grid voltage is too low, please shut down, but also see the powerAs no signal when the grid voltage is too low, please shut down , the upper and lower jitter. LOW and AC-IN 63 bus m
2、odeHIGHACIN0, or not. I think failure is a CPU peripheral circuit voltage detection. The measurement of CThe PU11 pin 4V, normal should be 1.6V, the peripheral circuit can disconnect the 11 foot, the foot measurement. The footThe power supply capacitor 10UF over no negative pressure for the normal c
3、apacity. The failure mode and repair of C busPu terminal voltage detection circuits. 2, help adjust the high failure rate of I2C summary1. It is the largest volume to 1: STEREO OPT, WOOFER OPT, PWM volume control selection) is adjusted to 0.2. Image: IC SELECT more than regular flashing (chip select
4、) error.3. No U segment: BAND OPTION (band selection) is adjusted to 2.4. AV switch: AV.OPTION (option AV) adjusted to 2 or 1.5. Negative, grating lighter or darker or even white and black, field box: C.B/W (black and white balance.The adjusted to 0).6. The image beats a minute before the normal dow
5、n: RF.AGC.7. Black screen and image appear alternately: COMB (comb circuit setting) is adjusted to 0.8. The grid voltage is too high, please shutdown : the exclusion of hard fault, POWER HIGH and POWER LOW numerical increase.9. Open the standby program reciprocal or press any key shutdown: MOD1 valu
6、e is not appropriate.10. Adjustable amplitude, linear invalid (excluding hard fault): MOD0 will be lowered.11. The volume, brightness, color adjustment when only low grades of high school: remote shutdown and then boot.High voltage power supply: 1, design of stand-by power supply circuit Hodge machi
7、ne is too simple, the power of 1015 to A966, voltage stabilityQualitative to reliable 2, adjustable resistance, 1K.3, the fault for treadmill color: according to routine change in the week, the fault is still. Successively, for laying pipe, pre 76810 (write memoryHave data, blank not boot, did not f
8、ind the number of data. But the data copied, the fault still spare).The old version of the 4.43 crystal change, search program, storage is normal, but is no longer running, no color.After the market to buy 4.43 crystal and 76810 supporting, for troubleshooting. You are a 18P series capacitor in the
9、oscillator can beTo you.4, the third generation of intelligent Huijia 25-29 motherboard, a month before the modification is completed, there is1, the color yellow, no color (4.43 crystal oscillator and 3839 pin C207 and other peripheral components to replace the invalid),Finally find out the tube re
10、d and blue gun (gun on the bad one, other black)2, elongated (remote control lost, adjusted R451 and R459 value change). In the R459 and a 2 pair resistor and a potentiometerYou can adjust3, pincushion distortion, regulation of RP301RP302 did not respond, but the boot for about 5 minutes before the
11、changes regulationToo lazy to check the correction tube and peripheral components, replace C437 invalid, simply disconnect R313, parallel in C437, a 0.68P, distortionEase，5, the first case is the main voltage is low and unstable, see whether the B+ potentiometer has a large number of fixed red paint
12、, if any, straightforward changeC, S4, C6, M9, T, H1, D, g*, G, V6, second cases were 24V or 15V power supply capacitor caused by bad startup difficulties, direct replacement, Shoudaobingchu - dont laughI move the soil and stupid, to the assembly of the cooler boot slowly, simple and practical, you
13、may wish to try! 1 h) F: D1 P/ P7 p7, with the LA76931+TDA8177, no signal is normal, there is a signal to run down, open the shell to view the super chip and field blockA part of the foot loose, after welding fault did not change, the remote control, press the edge of the hole 3 times, and then pres
14、s the mute turn to 3, No.A SETUP SELECT is changed to 1, then press the mute turn to 16 C.D.MODE (manual introduction frequency reading mode, fanWai 0-7, generally elected as 0, I choose to find even when the failure of the election, the election of odd numbers when the image is normal, you can choo
15、se 7,Then to the user, an assembly machine, the fault lights do not turn on, and sometimes more than 10 minutes or half an hour after the normal boot.Turn on the machine overhaul, CPU power voltage, reset voltage is normal, a look at the crystal is that kind of columnar, immediately change, immediatelyCan boot, and the refrigerator can not, and will replace the capacitor is the same. Later, remove the CPU and clean the printing plate and CPU, just OKThe. Later, in an example, with blowing heating crystal around, can boot, immediately cleaned, immediately resolved. This kind of board is o
