lt检测 ltp全套检测

2023-05-20 06:30:39

❶ 测试CPU主供电、核心电压、问题

主板维修一般不涉及cpu核心供电影响开机的情况也是不会测的。一般会先归结故障原因和类型来排查。cpu核心供电只是供电电路故障维修的一部分。一般检测需要上cpu假负载用万用表测量，如果几个监测点电压符合就说明cpu核心供电具备。另外电源管理芯片有很多型号，一般是在桥或电源附近长条型20脚左右的贴片芯片。

❷ 台湾丽伟LTC—20CP数控车床1011报警如何解除FANUC系统

台湾丽伟LTC—20CP数控车床FANUC系统：1011 TURRET NOT RDY (刀塔未就绪)。
THE TURRET DISK WAS NOT CLAMPED .(刀盘没有锁紧)。
按照电气原理图和梯形图，找到转塔刀盘没有锁紧的原因。（如检查：正反转继电器，刀位接近开关，刀盘锁紧接近开关，机械部分，等）

❸ 三洋ltc32ca-50五分钟自动关机，再开10秒关机5v12v24v电压偏高，

三洋电视，不定期自动关机，关机后再开机又工作一段时间，又自动关机。
电路特点分析：
(1)开关电源电路采用自激式并联输出型电路，并通过开关变压器主机芯与交流输入电路相隔离，即“冷机芯”电路；
(2)取样电路采用由取样绕组和整流滤波组成的间接取样方式：
(3)由V733可控硅、V734稳压管等构成的过压保护电路，采用开关管基极与启动电阻短地的方式，使开关管停止工作。主机电源开，关机受微处理器M50436-560SP⑧脚与接口驱动电路V1007控制，控制方式为继电器通/断交流电源输入式。
检修技法：
(1)监视过压保护电路可控硅V733控制栅极电压，判断保护电路是否动作。发现自动关机时V733
G极电压变为0.7V，说明过压保护电路已动作，故障的直接原因是过压保护电路起控所致；
(2)采用断开行负载、接假负载的方法试机。此时，当出现自动关机故障时，主电源115V
升高为125V左右，当超过125V以上时，V733可控硅触发导通，灯灭，说明故障出在开关电源电路中；
(3)通过检测取样稳压控制电路工作点的方法来发现异常部位，并发现当表笔触到C745
取样电压滤波电容时，突然自动关机，说明取样电压有异常。表笔触到C745，相当于在取样电路R745、R746、R747上并联表内阻，使提供给误差放大管基极的取样电流减少，使V745
c
极电压减小，减少了流向电容C742的电流，使V725、V726导通电流减少，开关管V720截止时刻滞后，导通时间增加，从而使储能增加，输出电压上升，造成保护电路动作故障。
用万用表检查，发现C745两端电压比正常值21V偏低且不稳，表明C745有漏电现象，但仍有充放电作用。由于万用表很难准确判断电容好坏（对电容性能不良更无能为力）．因此，采用同规格电容并联法试机。把一只47uF电容并联到C745上时故障消失，更换C745后故障排除。
故障原因分析（三洋电视维修）：故障系因C745取样电容漏电变值，使取样电压下降，流入V745误差放
大器基极偏流减小→V745
c极电压↓→V725
b极电压↓→V725
c极电压↑→V726
b极电压
↑→V726
e极电流↓→V720
b极注入电流↓→增加V720的饱和导通时间→l15V输出电压
上升→过压保护电路V733触发导通→V720
b极短地而停止工作所致。

❹ ltc电视机连接usb信号源蓝屏

蓝屏多数是因为切换的信号源不对，就是当前信号源没有检测到信号输入，故蓝屏保护屏幕。可以尝试按遥控器的信号源键或者输入选择键，切换信号源到USB模式试试，不行就检查USB口是不是坏了，或者换个USB设备试试。

❺ 关于变压器匝数比

变压器匝数比测试用于确定变压器一个绕组的匝数与变压器同相其他绕组的匝数的关系。

变压器极性测试确定了各种变压器绕组的矢量关系。变比测试既用作验收测试又用作维护测试 1，而极性测试主要是验收测试。

使用的测试设备通常是为此目的设计的匝数比测试仪。如果不可用，可以使用至少 0.25% 满量程精度的电压表来测量输入和输出电压，以进行近似。

变压器匝数比试验时 2执行时，应确定所有空载分接头的比率。如果变压器配备有载分接开关 (LTC) 1，应为每个 LTC 仓位确定该比率。如果变压器同时具有 LTC 和空载分接开关，则应确定 LTC 的每个位置与空载分接开关的一个位置的比率，反之亦然。

该测试可用于确定变压器是否有任何短路匝或不正确的连接，以及在验收测试中验证铭牌信息。

变压器匝数比测试连接

在测试变压器的匝数比时，连接是通过匹配平行向量来确定的。

变压器匝数比测试仪有多种样式和测试连接，但所有匝数比测试仪都至少有两条高线和两条低线。基本设置程序如下所述，确保变压器的所有端子都与变压器的线路或负载断开。如果需要，可以保留接地连接。在测试前通过初步检查来验证测试装置的性能。

三相型号：将H0、H1、H2和H3测试电缆连接到被测变压器相应的高压绕组端子上。对于三角形连接绕组，不使用 H0将 X0、X1、X2、X3 测试电缆连接到被测变压器相应的低压绕组上。对于三角形连接的绕组，不使用 X0。

仅使用 H1、H2 和 X1、X2 引线就可以使用三相 TTR 测试装置测试单相两绕组变压器。

变压器匝数比测试值

匝数比测试结果与相邻线圈或计算的匝数比的偏差不应超过半个百分点，超出此容差的测试值可能表明变压器绕组短路或开路。检查所有测试装置连接并对 TTR 执行自检并在必要时重新测试。

❻ ltc-51控制器怎么设置

1.控制面板法 “控制面板”-----“添加或删除程序”---“设定程序访问默认值”----“自定义”2 浏览器设置1. IE浏览器:【工具】菜单---【Internet选项】，打开【Internet选项】对话框，打开【程序】选项卡，选中【检查Internet Explorer是否为默认的浏览器】复选框，单击【确定】按钮，关闭对话框。

❼ 谁能告诉我LTC格式的文件怎么看

你的具体操作就是
把你的文件名改为111 把你的文件放到D盘根目录下
点击windows界面下的开始
然后再点击运行
然后在运行里面输入cmd
然后回车
然后再在里面输入如下内容
/111.itc e:123.mp3
现在你的文件已经被改为了mp3格式的了.被存放到e盘的文件123就是了.

❽ 行力电动执行器LTCQO12出现黑屏怎么处理

看看原因：
1.三相执行器电源缺相或电I源电压不对
2.三相执行器有一根电源线 2接到地线端子上
3.执行器内部插头脱落
4、交流接触器上电源线接触4不良
5. 三相频繁调节型执行器保 5险丝烧
6、显示屏不良
7、编码器不良或远传板不良
8主板到显示屏排线坏8、主板不良
解决方法：
1.用万用表测量接线板电源端子上的电压
2.察看三相执行器三根电源端子是否有一根接到地线| 2. 如电源线端子上
3.检查执行器内部插头是否插好.
4、用万表测量交流接触器与接线板电源端子和主板的| 4、如发现有电源线是接通.
5.用万用表测量保险丝有无烧坏。
6、更换操作显示板、
断开编码器和主板的连接线，如果显示正常，可判断是|更换网型号编码器或远传板
7、更换排线
8.观察主板上的指示灯，如果只有一个指示灯亮用万8. 如主板保表测量主板上的保险丝是否坏，如果有两个以上指示灯|换主板
亮更换一块同型号的主板试一下是否正常
1.用万用表测试电源电压是否正确
2.更换排线检查是否正常
3.更换显示板检查是否正常
4、更换主板检查是否正常

❶ Test the CPU main power supply, core voltage, and problems

Mainboard maintenance generally does not involve the CPU core power supply and will not be tested if it affects startup. Generally, we will first summarize the cause and type of the fault to troubleshoot. The CPU core power supply is only part of the power supply circuit fault repair. Generally, the test requires the dummy load of the CPU to be measured with a multimeter. If the voltages at several monitoring points are consistent, it means that the CPU core power supply is sufficient. In addition, there are many models of power management chips, usually a long chip with about 20 pins near the bridge or power supply.

❷ How to clear the FANUC system of Taiwan Liwei LTC-20CP CNC lathe 1011 alarm

Taiwan Liwei LTC-20CP CNC lathe FANUC system: 1011 TURRET NOT RDY (turret not ready) .
THE TURRET DISK WAS NOT CLAMPED.(The cutterhead is not locked).
Follow the electrical schematic and ladder diagram to find the reason why the turret cutterhead is not locked. (Such as checking: forward and reverse relays, tool position proximity switches, cutterhead locking proximity switches, mechanical parts, etc.)

❸ Sanyo ltc32ca-50 automatically shuts down after five minutes, and then shuts down after 10 seconds 5v12v24v voltage On the high side,

The Sanyo TV automatically shuts down from time to time. After shutting down and then turning it back on again, it works for a period of time and then shuts down automatically again.
Analysis of circuit characteristics:
(1) The switching power supply circuit adopts a self-excited parallel output circuit, and the main core is isolated from the AC input circuit through a switching transformer, that is, a "cold core" circuit;
(2) The sampling circuit uses an indirect sampling method consisting of a sampling winding and a rectifier filter:
(3) An overvoltage protection circuit composed of V733 thyristor, V734 voltage regulator tube, etc., using a switching tube base By shorting the starting resistor to ground, the switching tube stops working. The power on and off of the host is controlled by the microprocessor M50436-560SP ⑧ pin and the interface drive circuit V1007. The control method is relay on/off AC power input type.
Maintenance techniques:
(1) Monitor the overvoltage protection circuit thyristor V733 control gate voltage to determine whether the protection circuit is operating. It was found that V733
G pole voltage changed to 0.7V when it was automatically shut down, indicating that the overvoltage protection circuit had activated. The direct cause of the fault was the activation of the overvoltage protection circuit;
(2) Use the disconnection method Load and test the machine by connecting to a dummy load. At this time, when an automatic shutdown fault occurs, the main power supply 115V rises to about 125V. When it exceeds 125V, the V733 thyristor triggers conduction and the light goes out, indicating that the fault is in the switching power supply circuit;< br />(3) Find abnormal parts by detecting the working point of the sampling voltage stabilizing control circuit, and find that when the test pen touches C745
When sampling the voltage filter capacitor, it suddenly shuts down automatically, indicating that the sampling voltage is abnormal. When the meter pen touches C745, it is equivalent to connecting the meter's internal resistance in parallel to the sampling circuit R745, R746, and R747, which reduces the sampling current provided to the base of the error amplifier tube and reduces the V745
c
pole voltage. The current flowing to the capacitor C742 is reduced, which reduces the conduction current of V725 and V726. The cut-off time of the switch tube V720 lags behind and the conduction time increases. As a result, the energy storage increases and the output voltage rises, causing the protection circuit to malfunction.
Check with a multimeter and find that the voltage at both ends of C745 is lower than the normal value of 21V and unstable, indicating that C745 has leakage, but it still has charging and discharging functions. Because it is difficult for a multimeter to accurately judge the quality of a capacitor (it is even more powerless to detect poor capacitor performance). Therefore, the parallel connection method of capacitors of the same specification is used to test the machine. The fault disappeared when a 47uF capacitor was connected in parallel to C745. The fault was eliminated after replacing C745.
Fault cause analysis (Sanyo TV repair): The fault is due to the leakage and change of the C745 sampling capacitor, which causes the sampling voltage to drop and flows into the V745 error amplifier
The amplifier base bias current decreases→V745
c Pole voltage ↓→V725
B pole voltage ↓→V725
C pole voltage ↑→V726
B pole voltage
↑→V726
E pole current ↓→V720< br />B-pole injection current↓→Increase the saturation conduction time of V720→l15V output voltage
Rise→Over-voltage protection circuit V733 triggers conduction →V720
B pole stops working due to short grounding.

❹ Blue screen when LTC TV is connected to USB signal source

Most blue screens are caused by switching the wrong signal source, that is, the current signal source does not detect signal input, so the blue screen protects the screen. You can try pressing the signal source button or input selection button on the remote control to switch the signal source to USB mode. If that doesn't work, check whether the USB port is broken, or try using another USB device.

❺ About Transformer Turns Ratio

The transformer turns ratio test is used to determine the relationship between the number of turns in one winding of a transformer and the number of turns in other windings of the transformer that are in phase.

Transformer polarity testing determines the vector relationships of various transformer windings. The ratio test is used both as an acceptance test and as a maintenance test1, while the polarity test is primarily an acceptance test.

The test equipment used is usually a turns ratio tester designed for this purpose. If not available, a voltmeter with at least 0.25% full-scale accuracy can be used to measure the input and output voltages to make an approximation.

Transformer turns comparison testWhen inspection 2 is performed, the ratios of all no-load taps should be determined. If the transformer is equipped with an on-load tap-changer (LTC) 1, this ratio should be determined for each LTC bin. If the transformer has both LTC and no-load tap-changer, the ratio of each position of the LTC to one position of the no-load tap-changer and vice versa should be determined.

This test can be used to determine if the transformer has any shorted turns or incorrect connections, as well as to verify nameplate information during acceptance testing.

Transformer Turns Ratio Test Connections

When testing the turns ratio of a transformer, connections are determined by matching parallel vectors.

Transformer turns ratio testers come in a variety of styles and test connections, but all turns ratio testers have at least two high wires and two low wires. The basic setup procedure is as follows, ensuring that all terminals of the transformer are disconnected from the transformer line or load. The ground connection can be left in place if desired. Verify the performance of the test device through preliminary inspection before testing.

Three-phase models: Connect the H0, H1, H2 and H3 test cables to the corresponding high-voltage winding terminals of the transformer under test. For delta connected windings, connect the X0, X1, X2, X3 test cables to the corresponding low voltage windings of the transformer under test without using H0. For delta connected windings, X0 is not used.

A three-phase TTR test set can be used to test single-phase two-winding transformers using only H1, H2 and X1, X2 leads.

Transformer turns ratio test values

The turns ratio test results should not deviate from the adjacent coil or calculated turns ratio by more than half a percentage point. Tests outside this tolerance value may indicate a short or open circuit in the transformer winding. Check all test set connections and perform a self-test on the TTR and retest if necessary.

❻ How to set up the ltc-51 controller

1. Control Panel method "Control Panel"-----"Add or Remove Programs"---"Set Program Access Default value"----"Customize" 2 Browser settings 1. IE browser: [Tools] menu---[Internet Options], open the [Internet Options] dialog box, open the [Programs] tab, select [ Check the "Is Internet Explorer the default browser" check box and click the "OK" button to close the dialog box.

❼ Who can tell me how to view files in LTC format

Your specific operation is to
change your file name to 111 and put your file on the D drive Under the root directory
Click Start under the windows interface
Then click Run
Then enter cmd in Run
Then press Enter
Then enter the following content
br /> /111.itce:123.mp3
Now your file has been changed to mp3 format. The file 123 that was saved to the e drive is.

❽ Why does the Xingli electric actuator LTCQO12 have a black screen? Process

Check the reasons:
1. The three-phase actuator power supply is missing a phase or the power supply voltage is incorrect
2. The three-phase actuator has a power cord 2 connected to the ground wire on the terminal
3. The internal plug of the actuator fell off
4. The power cord on the AC contactor has poor contact
5. The fuse of the three-phase frequently adjusted actuator is burned
6. The display screen is defective
7. The encoder is defective or the remote transmission board is defective
8 The cable from the main board to the display screen is bad 8. The main board is defective
Solution:
1. Use a multimeter Measure the voltage on the power terminals of the wiring board
2. Check whether one of the three power terminals of the three-phase actuator is connected to the ground | 2. If it is on the power cord terminal
3. Check whether the internal plug of the actuator is plugged in Good.
4. Use a multimeter to measure the AC contactor, the power terminals of the wiring board and the motherboard | 4. If it is found that the power cord is connected.
5. Use a multimeter to measure whether the fuse is burned out.
6. Replace the operation display board.
Disconnect the connection cable between the encoder and the main board. If the display is normal, it can be judged that | Replace the network model encoder or remote transmission board
7. Replace the encoder Wire
8. Observe the indicator lights on the motherboard. If only one indicator light is on, use 8. For example, use a motherboard insurance meter to check whether the fuse on the motherboard is broken. If there are more than two indicator lights | Replace the motherboard
Replace a motherboard of the same model to see if it is normal
1. Use a multimeter to test whether the power supply voltage is correct
2. Replace the cable to check if it is normal
3. Replace the display board and check if it is normal
>4. Replace the motherboard and check whether it is normal