Hello again
I have been attempting to fix a Panasonic EZ47VEB VHS/DVD recorder for a friend. The problem is no Freeview - blank white screen during tuning. I have found several references to a similar problem, but not for this specific model. Similarly, I have managed to acquire a couple of service manuals for similar models but none for this exact model.
On initial inspection, there was a swollen capacitor in a location similar to other models. I replaced this, as well as a few others in the same area, but to no avail.
The similar repair to other models talks about a U81 error (which I have not experienced), caused by a faulty voltage converter. It does not seems unreasonable to assume that the same component might be at fault here. However, without a suitable service manual it's difficult for me to identify and test this, especially since the suspected component on the board I have is not marked in the same way as the component in other models (identified as an MD5001T).
In the first picture, I have replaced all the capacitors within the red box (C11711 was the swollen one). The second picture corresponds with roughly the same area on the bottom of the board - you can see that the board has been hot around the area of Q11700. I guess that the potentially faulty converter is either IC11700 or IC11370 (or perhaps their associated transistors, Q11700/Q11370?). These chips are marked "1016 817".
Does anyone have any experience of this fault (maybe even in this model!) or can help me with a service manual, or can identify these components? Probably the same MD5001T?
Thanks
I have been attempting to fix a Panasonic EZ47VEB VHS/DVD recorder for a friend. The problem is no Freeview - blank white screen during tuning. I have found several references to a similar problem, but not for this specific model. Similarly, I have managed to acquire a couple of service manuals for similar models but none for this exact model.
On initial inspection, there was a swollen capacitor in a location similar to other models. I replaced this, as well as a few others in the same area, but to no avail.
The similar repair to other models talks about a U81 error (which I have not experienced), caused by a faulty voltage converter. It does not seems unreasonable to assume that the same component might be at fault here. However, without a suitable service manual it's difficult for me to identify and test this, especially since the suspected component on the board I have is not marked in the same way as the component in other models (identified as an MD5001T).
In the first picture, I have replaced all the capacitors within the red box (C11711 was the swollen one). The second picture corresponds with roughly the same area on the bottom of the board - you can see that the board has been hot around the area of Q11700. I guess that the potentially faulty converter is either IC11700 or IC11370 (or perhaps their associated transistors, Q11700/Q11370?). These chips are marked "1016 817".
Does anyone have any experience of this fault (maybe even in this model!) or can help me with a service manual, or can identify these components? Probably the same MD5001T?
Thanks
Attached Files