Electronics > Repair
E4407B Tracking Generator Repair
<< < (11/27) > >>
smgvbest:

--- Quote from: smgvbest on September 26, 2020, 10:07:14 pm ---Tracing it so far. It does not go directly to the RF side of the A2A2 board
Goes thru a analog switch which switches between a fet op amp and J3 which is not connected,  then to Q1 which I haven’t been able to find yet.  It’s a 6 pin can.   See Attached

--- End quote ---

Oye,   I just did a SUT,   I was not tracing TUNE on Pin5 I was tracing ALC_EXT on Pin10.   I don't' know where I got Pin10 from but pretty much ignore my previous post.  I'll go retrace Pin5 for Tune and see where it goes.
analogRF:

--- Quote from: smgvbest on September 27, 2020, 03:06:42 pm ---
--- Quote from: smgvbest on September 26, 2020, 10:07:14 pm ---Tracing it so far. It does not go directly to the RF side of the A2A2 board
Goes thru a analog switch which switches between a fet op amp and J3 which is not connected,  then to Q1 which I haven’t been able to find yet.  It’s a 6 pin can.   See Attached

--- End quote ---

Oye,   I just did a SUT,   I was not tracing TUNE on Pin5 I was tracing ALC_EXT on Pin10.   I don't' know where I got Pin10 from but pretty much ignore my previous post.  I'll go retrace Pin5 for Tune and see where it goes.

--- End quote ---

I kinda knew because from the pictures I had already seen pin 5 (I had mentioned it is pin 5 it in my post) goes directly under that connector...
smgvbest:
So when you trace the correct PIN its pretty easy to find.
See attached

seronday:
Sandra,
I have just started reading this topic.
Correct me if I have misunderstood one of your earlier posts, but I understand that you have the schematic drawings for the 3Ghz A2A1 Driver board but not for the 3Ghz A2A2 RF board.

I have a printed copy of the drawings for the 1.5Ghz version of the tracking generator A2A2 RF board which I may be able to try to have scanned if this will be of any use to you.   (There are 13,  A3 size sheets).

Regards.
smgvbest:
@seronday

Thanks for the offer. 
It definitely could help if your able to get those scanned

Sandra

Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod