Power supply for a display refrigerator with LED lighting - what control system?

Hello.
If the topic is in the wrong section, please move it. I am trying to repair the power supply for the display refrigerator with led lighting, the power supply was flooded and damaged on the input side of the 230v bridge, transistor, resistors, capacitor and transistor control circuit.
The original transistor is ISA05N60A, the replacement I put in is P5NK80ZFP, the rest of the parts are the same as the original ones. The power supply still does not work, when I measure the voltage on the control system power supply I have 0V, the system is powered by two 320kohm resistors, it has a short circuit. Unfortunately, it has no markings, does any of your colleagues know what to replace it with? TSOP6 housing. Description in the photos.
zas-2.jpg Download (147.86 kB) zas-1.jpg Download (121.41 kB) zas-3.jpg Download (493.87 kB)

If there is a resistor in pin 3 (about 100k) then probably LD7535, OB2263, SG6848 or less known substitutes, for example XN1049. Look for.
What does it mean that there is no lettering on the layout? Scuffed, can't you read?

Thanks for the hint, I hurried up a bit, the disc was covered with varnish and I assumed in advance that there was no inscription on the system, it looked deceptively torn, after heating the hot-air and gently washing the paint off, the inscription 865G27 appeared, but Google does not find anything for me. There is 100k on pin 3 so I think I will substitute this LD7535.

And how was this power supply repaired? I have a similar one with the same control bone__

The power supply was theoretically repaired, but not tested in the device, so far the customer has not received it from repair. The power supply was connected to some control panel and did not want to start in the workshop.

And what about the 865G27 dice was replaced? If so, for what?

Replaced with LD7535.

Hello,

Does the power supply work after replacing the LD7535 and the fridge too?

greetings

Unfortunately, after replacing it with the LD7535, the refrigerator does not work. The symptom turns on and off and so on.

Hello,

Same failure on this card. I'm trying to find out what components to assemble ...

Watch out for the RJ1 resistor: its value is high (1.35 ohm / 2 W) and watch out for EC3 which may be out of order. Must it be mounted in position Q1: ISA05N60A ??

Witam, mam ten sam module sterujacy jak na zdjeciach. Niestety zpowodalo habencie ze SMD-IC U2 they zniszczyl na odwrotnej stronie platyny i pismo jest calkowicie nieczytelne. Moze ktos odzytac i mi podac dokladna nazwe? Dziekuje za pomoc.

Hello, I have exactly the same control unit as the one in the photos. Unfortunately the SMD-IC U2 on the back of the board is destroyed by a short circuit and the lettering is no longer legible. Can one of you read the exact name and tell me? Many thanks for the help.

Hello, I have the exact same control unit as shown on the other photos. Unfortunately the inscription on the SMD-type IC U2 was destroyed by a short-cut and hence, it is not still readable. Could one of you read the exact type and help me, Thx in advance. Please use one of the languages above, preferably German or English.

Hello.

AMBIANO MD16703, MEDION MD16703

I had the same problem with the inverter. Defective: fuse, U2 -865K01 chip, MOSFET - ISA 05N60A, rectifier bridge, EC3 capacitor on the secondary side.

Listed items:
N-Channel MOSFET - on 2SK2996 N-MOSFET 600V 10A 0.8R
U1 - TL431
U2 - on SG6859A
LTV817 optocoupler
EC1 - on a 120uF / 400V capacitor
Capacitors C4, C10
D5 - on 1N5408

There is no information about the 865K01 anywhere. As a replacement, I put in the SG6859A chip with minor modifications, according to the specification in pdf page 10.
http://www.mouser.com/ds/2/149/sg6859a-305985.pdf

I changed the supply resistors U2, R2 and R5 to three 470kom. Unfortunately I didn't have 1.5Mom.
R13 per 100om
R1 for 10om
RJ1 on 4.7 ohms
All electrolytic capacitors on both sides replaced.
Also listed C1 and the parallel resistors R1A and R1B

The inverter started to work, but it was jogging. The supply voltage U2 jumped between 10 and 18V. Although the EC1 capacitor seemed to be functional and it had its capacity under the meter, after its replacement the converter started.

The refrigerator functions properly after the inverter is installed.

Trank you very much for your comprehensive answer! I am currently on vacation and cannot answer in Polish with the help of a Friend, sorry for that. When i am back at Home i will work on that Subjekt again and answer in more detail.

SLiDer84 wrote:

Niestety po wymianie na LD7535 chłodziarka nie działa. Objaw włącza się i wyłącza i tak w kółko.

Hi, so it is working already? I have the same power supply and I am trying to fix U2. So LD7535 is ok for that power supply?

Dodano po 1 [minuty]:

ureuter wrote:

Trank you very much for your comprehensive answer! I am currently on vacation and cannot answer in Polish with the help of a Friend, sorry for that. When i am back at Home i will work on that Subjekt again and answer in more detail.

Hi, so did you fix it?

kisiek wrote:

kisiek

Hi kisiek,
can you tell me please, if your power supply after the fix works well? I need to fix the same power supply so I wondering I am going to fix it the same way you did.

Hello.

This is how the power supply works. Refrigerator received.

kisiek wrote:

Hello.

This is how the power supply works. Refrigerator received.

thank you

Hello guys,
I'm looking for what kind of parts are sitting in places :
IC3
R49
R31
R35
R48

Hello Kisiek! Thank you very much for your post. I followed the steps described by you and solved the problem with a source on AMBIANO MD16703. The SG6859A integrated circuit works perfectly with the changes you made.

MariusMeironas wrote:

R49
R31
R35
R48

In the first photo of this topic, you can see that they are all the same - 201 or 102

Hello everyone,

I have an issue with my card DQ04-001-D, the L1 component burnt down.
Does anyone know the part number and/or characteristics of L1?

Thanks!

My friend repairs such electronics for me. However, I found an original control board in an identical version and a new variant from China. If anyone is interested, I will provide a link to the Chinese. The cost of the tile including delivery is PLN 120 to PLN 180, depending on the store.

Provide the link here, it will be easier.

Thanks

https://pl.aliexpress.com/item/10050049444934...il_item.3.471243ceJq9AP8&gatewayAdapt=glo2pol

https://pl.aliexpress.com/item/1005002686396859.html?gatewayAdapt=4itemAdapt

I wanted to include a graphic, but I couldn`t.

Greetings to those interested.

The topic has been discussed since 2017. Everything has already been described, so it`s time to close.