tektronix 2465

[nmrguy]

Hi,
Does anyone know the interpretation of an error code
"TEST 05 FAIL A2"
on startup of a 2465?

Thanks in advance
Charlie

 

[David C. Partridge]

Test 05 Fail x2 means "negative level not negative enough".

This is probably due to failure of SMT tantalum electrolytic caps leaking
electrolyte over the board and damaging the voltage reference circuits.

You can download the service manual from:
ftp://bama.sbc.edu/downloads/tek/2465service/

Dave

 

[Jim Yanik]

"David C. Partridge" <mimx64xwy@dsl.pipex.com> wrote in
news:AI2dnU_Nq7Yf5sXZRVnygg@pipex.net:

Test 05 Fail x2 means "negative level not negative enough".

This is probably due to failure of SMT tantalum electrolytic caps
leaking electrolyte over the board and damaging the voltage reference
circuits.

Those models also had problems with bad 0.1uf decoupling caps,both axial-
lead glass and the plastic DIP type. I've found many on the D-A sample&hold
circuits.

The 2465 series didn't begin using SMD components until the 2465B model,and
then only on the microprocessor board.(which also incorporated the formerly
separate readout board.)

You can download the service manual from:
ftp://bama.sbc.edu/downloads/tek/2465service/

Dave

--
Jim Yanik
jyanik
at
kua.net

 

[David C. Partridge]

"Jim Yanik" <jyanik@abuse.gov> wrote in message
news:Xns97B8779A3D505jyanikkuanet@129.250.170.86...

"David C. Partridge" <mimx64xwy@dsl.pipex.com> wrote in
news:AI2dnU_Nq7Yf5sXZRVnygg@pipex.net:

The 2465 series didn't begin using SMD components until the 2465B model,

Ooops... missed that it wasn't a B model, so of course there are no SMT
devices.

Dave