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Forums Lobby MASTER YOUR NIKON CAMERA Nikon D60/D50/D40 (Public) topic #79
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Subject: "Secret of the D50 extra connector" Previous topic | Next topic
Shred   FI  Registered since 28th Oct 2005 Sat 29-Oct-05 04:04 PM
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"Secret of the D50 extra connector"



Originally the connector was discovered by a nikonian who's nick i cant remember
but because all posts were lost i decided to give this topic a new try,
maybe someone can tell what is the the purpose of the connector.

There is extra connector in the bottom of the D50 battery compartment,
it is hidden under little piece of plastic that is quite easy to remove.
http://koti.mbnet.fi/shred/Kuvat/D50extra.jpg
It was interesting to see that four of the eight connectors
were scratched, so the connector is used for something.

Previously speculated and debated usage of the connector.

Connector is for:
-Diagnostics
-LCD controller
-Vertical grip
-Power circuits
-?

  

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Replies to this topic
Subject Author Message Date ID
Reply message RE: Secret of the D50 extra connector avm247 Moderator Awarded for high skills in documentary architecture and aviation photography Donor Ribbon. Awarded for his support to the Fundraising Campaign 2014
29th Oct 2005
1
Reply message RE: Secret of the D50 extra connector Shred
29th Oct 2005
2
     Reply message RE: Secret of the D50 extra connector Shred
31st Oct 2005
3
     Reply message RE: Secret of the D50 extra connector frncheez
31st Oct 2005
4
          Reply message RE: Secret of the D50 extra connector Shred
10th Nov 2005
5
          Reply message RE: Secret of the D50 extra connector ronnchy
17th Nov 2005
6
               Reply message RE: Secret of the D50 extra connector Shred
17th Nov 2005
7
                    Reply message RE: Secret of the D50 extra connector Shred
18th Nov 2005
8
                         Reply message RE: Secret of the D50 extra connector ronnchy
18th Nov 2005
9

avm247 Moderator Awarded for high skills in documentary architecture and aviation photography Donor Ribbon. Awarded for his support to the Fundraising Campaign 2014   Rancho Cordova, US  Charter Member Sat 29-Oct-05 07:22 PM
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#1. "RE: Secret of the D50 extra connector"
In response to Reply # 0



I believe that the connectors are used when the unit is being diagnosed. It provides for 1) power, 2) connections for diagnosis of error messages.

Can it be used for a vertical grip? I don't know. Nikon do not have one listed as an option on the D50.

Anthony

The Moderator Page and My Gallery
"Eliminate the unnecessary and focus on the substance." (Tommy Ramone of the Ramones)

Anthony

The Moderator Page and My Gallery
The important things in life are simple; the simple things are hard.

  

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Shred   FI  Registered since 28th Oct 2005 Sat 29-Oct-05 07:47 PM
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#2. "RE: Secret of the D50 extra connector"
In response to Reply # 1



Diagnostics may be the right answer but why would D50 require different kind of diagnostics interface than D70(s)?

Besides Nikon D200 vertical grip (if it is a real thing) has very interesting contact pins.


Just speculating though...

  

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Shred   FI  Registered since 28th Oct 2005 Mon 31-Oct-05 12:34 AM
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#3. "RE: Secret of the D50 extra connector"
In response to Reply # 2



It seems that the linked D200 grip image is gone...
Well here it is again and now hopefully it stays online.
(i would have edited my last message but it wasn't possible)

  

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frncheez   Greenwood, CA  Registered since 29th Oct 2005 Mon 31-Oct-05 10:57 PM
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#4. "RE: Secret of the D50 extra connector"
In response to Reply # 2



Just a guess here from a few years working in electronic I'd say it is for Diagnostic as well. Since the camera is smaller they had, for sure, change the circuitry in there so...

Where 1/125th of a second can last a life time

  

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Shred   FI  Registered since 28th Oct 2005 Thu 10-Nov-05 08:28 PM
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#5. "RE: Secret of the D50 extra connector"
In response to Reply # 4



I didn't have anything better to do so i decided to do some measurements.
Equipment: Digital Multimeter Metex M80
Ground is taken from the tripod mount.

http://koti.mbnet.fi/shred/Kuvat/D50extraOhm.jpg

What the results tell?
I really have no idea, i could imagine that contacts 4 and 8 are used for voltage input.

  

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ronnchy   Toronto, CA  Registered since 28th Oct 2005 Thu 17-Nov-05 09:46 PM
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#6. "RE: Secret of the D50 extra connector"
In response to Reply # 4



take your multimeter and set it to continuity (audible would be helpful)
You'll need three hands to do this....
touch (or aligator clip) one test lead to the negative battery terminal. touch the other testlead to pin #1 and half press the shutter. Any reading? Now full press. Again, any reading?
Go through each pin and I'll bet you'll find the pre-focus and the shutter release.
That's how I found my pinouts on my D70. The only difference is that I had to take my camera apart to do the tests.
Go to the D70/D70s forum and search "home made grip".
Anyone willing to try this on their D50? I'd be willing to lend a hand...
good luck

Ron

Why can't I take pictures like that...

  

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Shred   FI  Registered since 28th Oct 2005 Thu 17-Nov-05 10:19 PM
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#7. "RE: Secret of the D50 extra connector"
In response to Reply # 6



Thanks for the info...now if i only had a spare time.

  

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Shred   FI  Registered since 28th Oct 2005 Fri 18-Nov-05 06:27 PM
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#8. "RE: Secret of the D50 extra connector"
In response to Reply # 7



Doesn't look too promising after 4 tested buttons and a command dial...
Only shutter button had a reaction and even that was a minor one.

No buttons pressed
GND -> 5 = 586 Ohm
Shutter half pressed
GND -> 5 =~585 Ohm
Shutter full pressed
GND -> 5 = 579 Ohm

Shouldn't the differences be little bigger that that?

  

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ronnchy   Toronto, CA  Registered since 28th Oct 2005 Fri 18-Nov-05 07:50 PM
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#9. "RE: Secret of the D50 extra connector"
In response to Reply # 8



Hmmm... You're right. I was expecting to see <1 ohm with the shutter half pressed. Actually, if you hold your testlead there long enough, you'll see the resistance slowly climb, but should still be less than 10ohms. When you do a full shutter press, you should get a continunity or low ohm reading on another pin. (not pin 5)
The pinouts on the D50 pic you sent me shows 8 contacts. I still suspect that a) none of them are power contacts and b) that they are shutter and command/sub-command dials:
in no particular order
1) shutter focus (half press)
2) shutter release
3) ground
4) command dial + direction
5) command dial - direction
6) sub dial + direction
7) sub dial - direction
8) (?) possible separate ground for the command/sub command dial.

Again, I can only go by my D70 and the MB-D100 grip that I took apart. But basically, one or possibly 2 contacts would be ground. When you connect this ground pin with one of the remaining pins, your camera should autofocus. Then touching the ground pin to another pin would fire the shutter.
The command/sub command dials work almost similar. Depending on which pin you pulse to ground will determine which direction you are 'turning' the command dial, clockwise or counter clockwise.
As you can tell, this kind of stuff facinates me. Sort of wish I had a D50 to test my theory on....
good luck.
Ron

Why can't I take pictures like that...

  

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Forums Lobby MASTER YOUR NIKON CAMERA Nikon D60/D50/D40 (Public) topic #79 Previous topic | Next topic