My take is the chip is bad because it has a piece of finger stuck to it?
Buy a new chip sans finger and the scope will run
again.
Rob
-----Original Message-----
From: TekScopes@...
[mailto:TekScopes@...] On
Behalf Of Alexandre Souza - Listas
Sent: Saturday, July 07, 2012 11:40
AM
To: TekScopes@...
Subject:
Re: [TekScopes] Re: tektronix 2445 help
3847K file just showing
something useless? Wake up to life, Luciano! :oP Why can't you host the
picture online or compress it better? :oP
---
Enviado do meu
Motorola PT550
Meu site:
-----
Original Message -----
From: "Lucianopep Luciano" <lucianopep@...>
To:
<TekScopes@...>
Sent:
Saturday, July 07, 2012 1:34 PM
Subject: Re: [TekScopes] Re: tektronix 2445
help [2 Attachments]
________________________________
Hello Tom
photo 4193 pin 18 U800 pin 16 non have trace..and test point 59
pin 9 u
735 see Photo 4195 ..4196
Probe X1 set.
hi ..luciano
:-)
?
Can you put the good scope on U800 pins 18 (tp60), 16 (tp63),
and test
point 59 (U735-9). Maybe take a quick picture of each.
The
one measurement that has me puzzled is U800 pin 11. It is over 1.5
volts
low and is a power input pin.
----- Original Message -----
>From: Lucianopep Luciano
>To: TekScopes@...
>Sent:
Friday, July 06, 2012 6:32 PM
>Subject: Re: [TekScopes] Re: tektronix
2445
help
>
>
>
>
>
>
>
>________________________________
>
>Hello
Tom What do you think? How about if I take once again the voltage
>all
pins of U800
>and you send a photo as you set my Telk 2445?
>The
values ??that I have highlighted are those that determine the
fault?
>Thanks Tom. Luciano :-)
>
>
>?
>Here are
the readings I get. I put them next to what you measured on your
>scope.
>
>
>pin 1 = -2,62 V -2.187
>pin 2=
-1233mV +1.164
>pin3= +14,52 V +10.21
>pin4= +8,30V +38.7 - hor
plate
>pin5= 0V 0
>pin 6= + 78,7V +84.3
>pin 7= +86,4V
+86.3
>pin 8= + 76,4 V +60.3
>pin 9 =+73,7V +39.2 + hor
plate
>pin10 = +15,01V +14.98
>pin 11= +3,95V +5.68 This one
puzzles me. The measurement I got is what
>I would
expect.
>pin12= +4,29V
+4.27
>
>
>
>
>
>
>pin13=+7,90 mV
+0.296
>pin 14= +4,96V +4.96
>pin 15= 0V 0
>pin 16= -1685mV
-1.683
>pin17= +230mV -0.306
>pin18= -57,4mV -0.007
>pin19=
+4,95V -4.98
>pin20= +24,7mV -.003
>pin21= -41,2mV
-0.032
>pin 22= -1367mV +0 .035 H pos centered, yours is ok
here.
>pin 23= 0V 0
>pin 24=+609mV -4.97 I need to review this
one.
>
>
>
>>>
>
>
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