Ap 400 A

#1 09-30-02, 06:12 PM

Dear all,
I am a new member in this group. I have a problem with my AP 400 A and looking for manuals to check the amplifier and servos. My Skymaster is a 1973 T337G-P S/N 0124 D-IKSW. I learned from the board that Bob has manuals. Is it possible to get a copy ore to buy one?

Happy landings

Jonny

Bob Cook · #2 09-30-02, 07:54 PM

Jonny

If you give me the part numbers I can scan and send you the key pages. These manuals are rather large.

Is it only the servos you need ?

bob

#3 10-01-02, 07:18 AM

Dear Bob,
many thanks for your help. Ampilier CA-530A PN 37970-0028, Control Unit C-530A PN 37960-1028. I am able to send the PN for the servos on thursday. The origional equipment list shows Pitch Actuator 35070-0124 Roll Actuator 35070-0028. I need no parts because I have to check first all components to locate the error.

Jonny

Pete Somers · #4 10-07-02, 04:50 PM

Hi Jonny

I notice your Skymaster is German registered, is that your base?
then maybe i could be of help, i am based in the UK and have alot of experiance on the 400A, and i do have the book on the 400A IFCS and i am sure i can get a 400A manual to copy.
Please let me know.

Pete Somers

Bob Cook · #5 10-07-02, 07:06 PM

I think Johnny's problem is the power supply in the computer unit. I do not have the manual available to me until thursday or Friday. He is not getting a latch on the main power switch indicating one of the voltages is possibly missing. He can easily pull the control head and find the +/- and ref voltages without yanking the computer. I think you can pull the servo connectors on the computer and see if there is a short or extra load on the power supply.

Maybe you can give him locations to check the voltages on the control unit.

If the voltages are present then the on switch should latch and obtain "some joy".

There is no easy way of checking voltages without test cables or harness.

I tried emailing Johnny directly but was unable to get a response.

Bob

Pete Somers · #6 10-08-02, 05:06 PM

Yep I don't think we are going to get a reply from this guy, any here are the conection for the + & - 6 volts, measured on the either the roll or pitch servo connector.

Pin L + 6 volts +_ 1%
Pin C - 6 volts +- 1%
Pin H + 28 volts switched
All the voltages to be measured ref to ground and with the autopilot switch engaged or held on.

If these are ok them something is wrong with the remote disengage switch on the control column.

Let me know how you get on

Pete Somers