Search found 42 matches

by jcarlos
Wed Jan 13, 2021 9:18 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

My brother has one, but I don't think he has screws to open it, so I don't know his electrical scheme.
by jcarlos
Wed Jan 13, 2021 8:33 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

I can see the 150 Ohm resistance R24, the capacitor to ground C36 and the coil L8, the latter, in my RF module, goes through a diode to the RCA jack for the RF output. The scheme is similar to that of my RF module but not the same, Those 13V DC, it takes it from the filtered power output (2200uF cap...
by jcarlos
Wed Jan 13, 2021 3:43 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

My brother uses an external RF switch, for an old television dedicated to the NES. So I wonder will it work properly when using the 9V DC source?
by jcarlos
Wed Jan 13, 2021 1:28 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

But a good switched source is very complex and must also be very expensive. The sources of the style that I have shown you are switched, and if not, do they have any advantage over the original transformer?
by jcarlos
Wed Jan 13, 2021 1:14 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

What is the external RF switch? This thing: https://images-na.ssl-images-amazon.com/images/I/615vRfzVZyL._SL1024_.jpg The thing that lets you use a TV that doesn't have a SCART or A/V cinch jacks. Ah OK I had seen this power supply, but I do not know if it has that switch One of these: https://en.w...
by jcarlos
Wed Jan 13, 2021 12:53 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

I had seen this power supply, but I do not know if it has that switch for low loads that you tell me, it is an Amazon Spain page, sorry. I think the diameter of the connector matches 5.5mm on the outside and 2.1mm on the inside. The polarity I think is + on the inside, although I think this doesn't ...
by jcarlos
Wed Jan 13, 2021 12:40 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

Another question I ask myself, about the old non-constant transformer is if I can power the NES with a continuous source (DC)? Only two of the four diodes would conduct and the other two would remain inversely polarized and the input of the 7805 will have the DC supply voltage minus 1.4V approx. wh...
by jcarlos
Wed Jan 13, 2021 12:36 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

And is it better than the original transformer?
by jcarlos
Wed Jan 13, 2021 12:32 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

So I can feed the NES with a source of 9V DC and 1A or more quietly?
by jcarlos
Wed Jan 13, 2021 5:57 am
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

Another question I ask myself, about the old non-constant transformer is if I can power the NES with a continuous source (DC)? Only two of the four diodes would conduct and the other two would remain inversely polarized and the input of the 7805 will have the DC supply voltage minus 1.4V approx. whi...
by jcarlos
Wed Jan 13, 2021 12:41 am
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

lidnariq wrote:
Tue Jan 12, 2021 2:14 pm
Yes, supposedly the UA6540 should be compatible.

You may also be able to use other CPUs with varying levels of compatibility.
But the most compatible is the UA6540, right?
by jcarlos
Tue Jan 12, 2021 4:37 am
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

When they arrive, I will tell you if there is a problem or everything is fine. I am very grateful for your indispensable help. I can only hope and pray that the CPU is good, because otherwise it is difficult to find and expensive despite being second-hand, also they do not give you guarantees and th...
by jcarlos
Tue Jan 12, 2021 4:33 am
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

The PPU has an expected delivery date between January 22 and February 3, and the memory between January 16 and January 20

Memory: https://es.aliexpress.com/item/40006961 ... 63c0xYVeyM
by jcarlos
Tue Jan 12, 2021 4:13 am
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

I have unsoldered the PPU and the memory, and I have soldered pin strips for both. I have had to solder two jumpers for two connections that have been cut while desoldering. I have measured continuity of all the affected connections and I think everything is fine.
by jcarlos
Sun Jan 10, 2021 12:18 pm
Forum: NES Hardware and Flash Equipment
Topic: NES-001 cap replacement guide for the av power module
Replies: 82
Views: 14842

Re: NES-001 cap replacement guide for the av power module

So the first thing I should do is replace the PPU and a new memory that I have ordered whose reference is LH5116D-10? I think so. Just the PPU first. Even with bad memory you'll often get a weird crash instead of just a solid colored screen. You didn't have to order specifically that 2KB RAM. Any 2...