Hisense color TV TC2199M common upper retrace line fault repair (very unexpected cause of failure) - android - Phones Developers

DFN1006 TP-RCLAMP3321P ESD Diode Low Capacitance

Filter 18.432M

TC2199M failure phenomenon:

In other words, let's take a precise shot first, remove the bootstrap and replace the booster booster capacitor, and the power-on boot is unexpected. The gun is not accurate.
The field supply filter capacitor is in parallel again, the boost diode is in parallel, and the output capacitor is also in parallel.
Prepare the bullets and try another shot: replace the field block and boost diode. Oh, not playing!
The measuring field block LA7840 4, 5 feet are 2.5V. 3, 6 feet 24V, 2 feet output end 12V, completely normal.
It seems that this enemy is deeply hidden, and it is necessary to use a big killing trick to bring a carpet bombing: pull out the peripheral components of the field block and remove them all to verify the body.
It took half an hour to get nothing. Is it LA76810A not good? Drawings can refer to TC2199F:
TC2199F .pdf
Measuring LA76810A 23 feet 2.65V is basically normal, carefully observe the image field is slightly larger, is the output field excitation signal slightly higher?
Use the MF47 meter DC 0.25V file to measure 23 feet to the ground, (MF47 meter DC 20KΩ / V, the internal resistance of this file is 5KΩ).
I don't look at the voltage because I have already watched the watch, and the normal picture that I missed on the TV screen came out.
Power-off measurement 23 feet to ground resistance turned out to be more than 18K, and finally the truth is white.

Mechanical Timer Socket

24 hours mechanical timer
Instant indicator
Min.setting time:15 minutes. Max.setting timer:24 hours
With hand switch,can be switched to operating and

setting at any time

Instructions:

1. Set program: 1 pin is equivalent to 15 minutes. Determine desired start time and push down pins until desired
off time.
For instance, if you want electrical devices to work from 8:00am to 11:00am and from 13:00pm to 17:00pm, you
just need to put down allthe pins between the three period time.
2. Set the current time: Turning the dial clockwise until the arrow pointing to
current time.
For example,if now it is 8:00 am, please turn the dial and make sure the
arrow point to 8. (See the picture.)
3. Plug the electrical device directly into the timer. Make sure the electrical
device is power-on.
4. Plug the timer into electrical outlet and the electrical device will be work
according to the setting program.
Note: = Normal Ope n = Timing
Make sure the switch on the Timing position. If it
is on the [Normal Open" mode, the electrical device is
always power-on and the timer function no work.

Specifications:

Caution:
1.D o not exceed the maximum ratings of the timer.
2.M ust reset the current time after power failure.
3.D o not plug the timer directly into the working electrical appliances.
4.U nless changing the setting, keep the program same every day.
5.D o not disassemble timer by yourself. Professionals service are needed for maintenance.

6.T his item is only for indoor use.

Plug-in Mechanical Timer, Mechanical Timer Socket, 24hr Mechanical Timer, Mechanical Timer Plug, Mechanical Timer Adaptor, Mechanical Electric Timer Switch

NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com