Richtige Fernseher haben Röhren!In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....
If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.
These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.
While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.
Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.
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Changhong LS01 LCD TV SMPS schematic - FSP205-5E01
There
are voltage output in the power panel: +24V 6A,+12V 2A, +5V
2A, and +5VS1A. +24V output is provided for LCD screen; +12V output is provided
for power amplifier TDA8944J, and is also changed into +8V output by
AZ78L08ZTR-E1 to supply STV-8217 IC; +5V output is changed into 1.8V output and
3.3V output by DC/DC (such as AZ1117H-1.8TRE1 and AZ1117H-3.3TRE1) to satisfy
the needs ICs. +24V, +12V and +5V outputs will be cut off in standby state.
While +5VS output is the power supply of MCU, infrared receiver and EEPROM etc,
and will be cut off when the AC is turn off.
5V output will be divided into two ways: one way is changed into +3.3V
and +1.8V analogue power supplies through DC/DC converter for STV-8217 IC,
ANX9011LF IC etc and peripheral circuits; other way is changed into +3.3V and
+1.8V digital power supplies through DC/DC converter for SVP-CX32 IC etc and
peripheral circuits, and this way of 5V voltage will be cut off in standby
state, while the other way of 5V voltage supply power especially for MCU,
infrared receiver and EEPROM etc, and will still operating in standby state.
