T.amp TSA 4-1300 Power Amplifier Issue: Not Turning On, Red Diode Flashing, No Visible Damage

Question

Hello I am the owner of the T.amp tsa 4-1300 power amplifier The problem is that the tip won't turn on. After unscrewing the housing and measuring the voltage to the switching power supply, I noticed that the red diode mounted next to the capacitors was flashing. I will add that the fuse is...

Anonymous · Accepted Answer

And there is a pwm sg3525 generator. Added after 12 [minutes]: Ir2110 is the IGBT driver, so the sg3525 through the ir2110 controlled those IGBT transistors that exploded. 2 transistors per driver, that is, if it is okay. This whole system is also to be checked. An oscilloscope / frequency counter will be needed, or the second option, blind replacement, and fireworks, smoke and stench, or it will turn on.

Matek920605 · Answer

I pulled out the entire motherboard, the IRGP 4066D transistors literally fired

jozgo · Answer

Do you have a diagram or service manual for it? I have not seen on the internet.

Matek920605 · Answer

Only Service Manual, I looked for the schematic everywhere and did not find it

jozgo · Answer

Unfortunately, it is a User Manual, i.e. a user manual, not a service manual. Maybe someone has. Because not having it on the table and not having a pattern means reading coffee grounds.

Matek920605 · Answer

Exactly, I looked at the entire board carefully, only these transistors are damaged, the capacitors are complete, all paths are ok. The power amplifiers on each of the 4 channels are also functional. I can send photos of the whole album if I can Added after 8 [minutes]: In the evening I will send more detailed ones Added after 30 [minutes]: photos before removing the heatsink with IRGP transistors removed Added after 4 [minutes]: removed heat sink and transistors that are in the same row as the damaged IRGP are mounted on the same heat sink Added after 10 [minutes]: additionally, photos in the attachment

Matek920605 · Answer

What made these transistors fire?

Anonymous · Answer

These transistors (I'm shooting) are on the primary side of the inverter. This is keyed by the transformers between the capacitors. They exploded because they had more current flowing than they could withstand.

Matek920605 · Answer

that is, as if some resistor refused to obey .. only by the eye you can not see any resistor that would be connected to them, only what is this MKKP82 capacitor Added after 22 [minutes]: I personally suspect a transormator .. there is only a problem because there is no serial number on this current one .. I see transistors for 600V

398216 Usunięty · Answer

Due to damage. And where this damage has occurred, it would have to be checked. It is possible that the transistor itself was not fully functional, it is possible that for some reason it was overloaded, or ... overheated. Added after 1 [minutes]: TRANSFORMER - like the captain of the ship; comes down last.

Matek920605 · Answer

Transistor data

Anonymous · Answer

These transistors (if it is as I suppose) should be controlled by a PWM generator. Is there any integrated circuit nearby?

Matek920605 · Answer

there is no integrated circuit in the area, just more transistors behind them, but this is shown in the picture. they are marked: GBJ3006SF, 2506SF, 2x APT60D060BG Added after 2 [minutes]: in this video the guy pretty much shows exactly what's inside.

Anonymous · Answer

And on the other side of the record? Gbj3006sf is a rectifier bridge, check it from the variable side with a multimeter, unsolder one leg of the variable, because there will be a short circuit on it through the windings of the transformer.

Matek920605 · Answer

just something like that

Matek920605 · Answer

cool, I think my eyesight is poor Thanks for your help, I order parts and start replacing, I only have a question about these transistors, it's hard to find identical to the 739P designation. Can something else be used? E.G. 725p

Anonymous · Answer

The type and housing should be the same, those markings may be some production date. no serine, they probably are of little importance. I don't know, these irgp4066d are 50 PLN. It will be expensive fireworks.

Matek920605 · Answer

I also looked at ALI .. there for 10 50 PLN, but I do not know whether to risk it Added after 2 [hours] 51 [minutes]: There are 2 types of these transistors? I found IRGP 4066D and IRGP 4066D-EPBF.

INtRO_Tech · Answer

Hello, I have this amplifier with an identical fault. Replacing the IRGP4066D and IR2110S will not do anything, I already had very expensive fireworks after replacing them, the taste turned on fully, the condoms started charging and after 3 seconds the main converter was turned on with a bang IGBT (but the voltage was correct because the green LEDs on all channels lit up). The problem is that there are a lot of SMD elements around the IGBTs and they are of unknown value, eg capacitors, LEDs labeled EF8, etc. Maybe one of these elements may also be damaged, but the selection without knowing the value is omitted. In my free time, which will come one day, I am going to replace the SG3525, and again the IR2110S and take the waveforms off with an oscilloscope, maybe they will tell something. This converter is not very difficult, it is a full bridge system, but without knowing the SMD value, it is a bit of a lottery. Thomann is playing a fool with the schematic. Regards

Anonymous · Answer

From what my colleague describes, it would seem that the converter got up, after these 3 seconds the load could turn on, the converter must accelerate with the fill factor, such a soft start. I would rather look for the problem further behind the inverter. You write that after 3 seconds the relay turned on? (Switching on the main generator?) And the explosion of hmn. Maybe this (relay) can be deactivated for the first time?

INtRO_Tech · Answer

Hello, When writing back quickly - it seems to me that the system works like this - you turn it on, the main capacitors are charged for 3 seconds and the converter is turned on via the triac. The behavior was exactly like this: - Power ON, - The diode on the motherboard was on, the capacitors are charging, - After 3 sec. start of the converter, lighting of green LEDs on the front, - millisecond and IGBT crash. I probably have a problem on the primary side in SMD components, maybe some blanking resistors, gate control diodes ... I measured everything and found a few problems, but as I wrote above - this applies to SMD diodes, e.g. with the EF8 marking ... Resistors are not a problem . On the secondary side, I have everything OK, before the repair of the converter in channel 2, there were two shorted transistors in the positive and negative branches, they are replaced. All short circuits and problems have been removed, even for this purpose I soldered out a hit. Regards

Matek920605 · Answer

Hello, in my case, I measured everything again calmly, it turns out that 1 channel is completely burnt, all 10 power transistors are punctured. As for these EF8 diodes, with the ir2110s systems, one is also damaged, because there is a transition on both sides, and I noticed that next to this diode, the ir2110s system has a slight bulge .. the rest of these LEDs on the entire board or there is no transition A mostly shows values similar

INtRO_Tech · Answer

Hello, First remove the IR2110 chip and then measure, these systems are damaged, they get short circuits. EF8 diodes are also present in the gretz bridge for low voltage on the secondary side, there you can also measure. I can't find this diode in any SMD decoder, unfortunately.

Anonymous · Answer

Buddy intro_tech, out of curiosity, I will ask which side of the inverter are Apt60dq60bg are some fast 600v diodes. What can they do not work with igbt transistors?

INtRO_Tech · Answer

I do not have this amplifier in front of me now, but rather fast diodes will be for the IGBT. There are not many elements in this converter, but cramped values ... here it is lame. One could try to substitute some other converters for the test, but the parameters are unknown. The same situation with the power amplifier - put symmetrical voltages on the secondary side (there are 4 of them in total) as it plays, the problem is that someone would have to measure these voltages from an efficient amplifier. Added after 3 [minutes]: It was not without reason that the German forum considered this amplifier a bomb, including no current limitations for the converter, opinions are divided - one guns, and others the converter breaks with a bang, most often right after the warranty.

Matek920605 · Answer

It was measured after removing the IR2110S. Today, after work, I start desoldering the transistors from the burnt channel and measure the rest of the things

Matek920605 · Answer

the entire board has been checked for damaged diodes with the designation EF8 and transistors (because IR2100S, IRGP is known ) on the whole board, diodes marked EF8 - damaged 3 pieces (the rest showed only one way about 500 OHM. Power transistors marked: NJW0302GC - damaged pieces 10 (one whole channel, transistors punctured). On the line of damaged power transistors there were also 2 pieces of damaged transistors (mosfets) GP105N15M - damaged 2 pieces. I found another damaged transistor, I had no pleasure, with the designation KB15038B, which was located next to the damaged power transistors. I have not checked the capacitors yet, only for damage that are visible without measurements attached photos of the elements Added after 5 [minutes]: photos in better quality

Matek920605 · Answer

in the attachment there is a measured diode marked EF8 with a tester

Anonymous · Answer

Hi. Upload the pcb picture where the PWM generator and drivers are all the way up from the power cable to the IGBT. Something has to power this system. How is it resolved? Same as in post # 15 but clearer because you can't see anything behind SG3525.

T.amp TSA 4-1300 Power Amplifier Issue: Not Turning On, Red Diode Flashing, No Visible Damage

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Post #16

Post #17

Post #18

Post #19

Post #20

Post #21

Post #22

Post #23

Post #24

Post #25

Post #26

Post #27

Post #28

Post #29

Post #30

Topic summary