Date   

Re: Tektronix 2215 crt [3 Attachments]

Tom Jobe <tomjobe@...>
 

Hi Chris,
To get a 7603 that actually works for $80 US is quite amazing, but plan to have to work on it a bit as this stuff is fairly old.
The good part is that these fine old scopes are very well understood, and that the Tekscopes archive has much of it documented for you.
Not many scopes have a nice big CRT like a 7603!
tom jobe...
 
 
 

----- Original Message -----
From: Chris G
Sent: Tuesday, December 04, 2012 5:38 PM
Subject: Re: [TekScopes] Tektronix 2215 crt [3 Attachments]

 

Thanks Tom and David for your advice,i think i got a good deal on the tek 7603 for $80,it has a very good display and clear trace,the calibration seems to be ok up to my understanding, lets play  a little with it and see how it does....thanks

On Tue, Dec 4, 2012 at 1:18 PM, David <davidwhess@...> wrote:
 

An analog TV will not work for that but another oscilloscope in X-Y
mode would. You can probe along the vertical and horizontal amplifier
chains (or at the CRT plates but I would try to probe earlier) after
the channel switches to generate a display good enough for diagnostic
purposes. I actually did something like this to my 7603 using a DSO
so I could record a curve tracer display.

If you do the above, either use differential probes or do NOT connect
the single ended probe ground lead to one side of the differential
signal. If using single ended probes, connect the ground lead to the
real signal ground and not to one side of the differential signal
path.

I have really grown to like my 7603 and I think it will do everything
a 2215 will do even without any fancy plug-ins. Based on my
experience fixing a friend's 2215, I would prefer the older 7603.

On Tue, 4 Dec 2012 07:50:17 -0500, Chris G <tikitoteam@...>
wrote:



>this are the tek 7603
>
>On Tue, Dec 4, 2012 at 7:24 AM, tikitoteam <tikitoteam@...> wrote:
>
>> **

>>
>>
>> Hi guys,thanks for all the help....
>> I have a tektronix 2215 with broken crt,it powers up and seem to run i
>> wanna ask you if is any circuit in the forum or if it's possible connect it
>> to a analog tv and be able to run a test or see if the unit work and
>> produce a display.
>> The reason i wanna have for my use and i wanna know if deserve invest on a
>> crt for it...thanks in advance.....
>> I want to thanks all the guys that help on my tek 2465 it is almost
>> done,just waiting for parts i will post results when get done....Chris



Re: Tektronix 2215 crt

tikitoteam
 

Thanks Tom and David for your advice,i think i got a good deal on the tek 7603 for $80,it has a very good display and clear trace,the calibration seems to be ok up to my understanding, lets play  a little with it and see how it does....thanks

On Tue, Dec 4, 2012 at 1:18 PM, David <davidwhess@...> wrote:
 

An analog TV will not work for that but another oscilloscope in X-Y
mode would. You can probe along the vertical and horizontal amplifier
chains (or at the CRT plates but I would try to probe earlier) after
the channel switches to generate a display good enough for diagnostic
purposes. I actually did something like this to my 7603 using a DSO
so I could record a curve tracer display.

If you do the above, either use differential probes or do NOT connect
the single ended probe ground lead to one side of the differential
signal. If using single ended probes, connect the ground lead to the
real signal ground and not to one side of the differential signal
path.

I have really grown to like my 7603 and I think it will do everything
a 2215 will do even without any fancy plug-ins. Based on my
experience fixing a friend's 2215, I would prefer the older 7603.

On Tue, 4 Dec 2012 07:50:17 -0500, Chris G <tikitoteam@...>
wrote:



>this are the tek 7603
>
>On Tue, Dec 4, 2012 at 7:24 AM, tikitoteam <tikitoteam@...> wrote:
>
>> **

>>
>>
>> Hi guys,thanks for all the help....
>> I have a tektronix 2215 with broken crt,it powers up and seem to run i
>> wanna ask you if is any circuit in the forum or if it's possible connect it
>> to a analog tv and be able to run a test or see if the unit work and
>> produce a display.
>> The reason i wanna have for my use and i wanna know if deserve invest on a
>> crt for it...thanks in advance.....
>> I want to thanks all the guys that help on my tek 2465 it is almost
>> done,just waiting for parts i will post results when get done....Chris



Re: Off shoot of .... FS: pkg. of 25 Tektronix 4.64K, 1%, 1/4 W film resistors

Rob <rgwood@...>
 

Thanks for the insight. The couple of experiences I have had utilizing it do
not align with your experience.
I do however agree/appreciate that saving a couple of dollars would not be
worth that kind of trouble.
In addition my orders are very intermittent and of a non-critical nature (as
I only dabble in all this for the hobby value) so I have not paid a lot of
attention if it takes 2 vs. 3 days for things to arrive, etc.
On the other hand, I absolutely loth the bite shipping takes out of our
pursuits so anytime I can minimize it I try to..
As always I appreciate the bandwidth and hope this finds you well.

-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of Mark Wendt
Sent: Tuesday, December 04, 2012 4:30 AM
To: TekScopes@yahoogroups.com
Subject: Re: [TekScopes] Off shoot of .... FS: pkg. of 25 Tektronix 4.64K,
1%, 1/4 W film resistors

On 12/03/2012 08:11 PM, Rob wrote:
I guess I will join on the post 1/2 way in the middle to point out
that if you leave a business name out of the Mouser addresses.
It opens an option to get flat shipping at $4.99 to your home.
Not that I am partial to any of the various electronics houses, nor to
impact the original offer because if I had a need I would exercise it
in lieu of any other things discussed Mostly because I like the
thought of us all helping each other out... .
Anyway, just thought I would point out the Mouser lower shipping thing
if some are not aware (I missed out for a while) and given some of
the other banter in the general post , etc..
I tried that flat shipping once. Once. It normally takes about 3 days for
my orders to arrive from Mouser using the priority mail option for $6.99.
The flat rate goes through some UPS/USPS gyrations and it took
10 days for my order to arrive. Save 2 bucks, add a week to the shipping
time. It was handled by UPS from Mouser to a USPS mail distro center nearby
in DC, where it sat for a week waiting for UPS to pick it up and deliver it.
Then UPS proceeded to supposedly not be able to find my home address.
Course, we've been getting UPS deliveries at this address for almost 20
years.

I'll stick with the priority mail service for the small orders, of which
99.9% of mine are.

Mark


------------------------------------

Yahoo! Groups Links


How to remove 2465 vert preAmp hybrid? ..again!.

iglesia_cristiana_arpas_eternas
 

seems my previous post was involuntary invaded!!

Hi , I was removed the 4 nuts, but the heathsink remain fixed.
Is any other fixing elements or just sticked by thermal grease or else?.
Could I apply "necessary" force or not?.


I have an erratically up jump beam of 2 division on the position of channel 1.
But turn the vertPos pot end to end fix the problem until next time appear
again, my first suspicious is the pot itself, my second is the U100 hybrid
...what yours third one?.

My goal is try to swap the hybrid to see if the jump follow the swap or not (I
hope not) in order to discard hybrid failure , and find the failure in peace
mind.

Any clue or ideas about this behavior ?.

Regards and thanks in advance Gabriel.


Re: Learning from experience......the tale of the ceramic C

iglesia_cristiana_arpas_eternas
 

My two cents..also the trimmers capacitor with film between plates fail..the film degrade and short is coming and the worst is that is intermittent second you adj the trimmer..or the whether change.
Gabriel.

--- In TekScopes@yahoogroups.com, "John S" <John@...> wrote:


Well, there I was, "fixing up" a 7633.

There are two 7A18 amplifiers to align.

One channel has an appalling square-wave response: all over the place as you select various attenuator settings.

With the attenuator out (5mV/div) the response is way down at HF.

After a bit of head-scratching it becomes apparent that the signal is wrong leaving the source of the input FET. Changing the FET makes no difference. Neither does removing the input clamp diode.

Now there are only half a dozen passives left*: three R's plus 3 C's. All the R's check out OK. In desperation I change the entire assembly, and the signal came good. The culprit was the 1.8pF capacitor to ground (C212). It measures close to 18pF on a simple digital capacitance bridge, and I did wonder if this component has been incorrectly marked and somehow got through the Tek system undetected. However, further investigation revealed that this "capacitor" really has failed in a most unusual manner: here are the results of a few tests:-

DVM ohms: (overload)
Insulation tester: 10Gohm @ 100V DC
Digital capacitance meter: 22pF
ESI LCR-bridge: 12.5pf // 80n Siemens @1kHz (i.e.12Mohm approx)

Two similar styles of NOS tubular ceramic both measured their nominal cap. value and 0nS, so clearly the Tek part has failed high capacitance and high loss, (either series esr or some kind of dielectric fault).

So, next time you're up against some weird fault, don't discount the humble and lowly-stressed ceramic caps!

John

* PS will post some photos under 7A18.


Re: Learning from experience......the tale of the ceramic C

 

Hi,

The part may be part of a bad batch from the factory. I have found all kinds of miss labeled parts. The x10 error makes me think this was a bad batch. I have seen caps labeled 150 be 15pf and 150pf. You find entire reels mislabeled. In factories you have dispatchers who make mistakes and sometimes switch paperwork without knowing what they are doing.


Jerry Massengale



-----Original Message-----
From: John S
To: TekScopes
Sent: Tue, Dec 4, 2012 3:19 pm
Subject: [TekScopes] Learning from experience......the tale of the ceramic C

 

Well, there I was, "fixing up" a 7633.

There are two 7A18 amplifiers to align.

One channel has an appalling square-wave response: all over the place as you select various attenuator settings.

With the attenuator out (5mV/div) the response is way down at HF.

After a bit of head-scratching it becomes apparent that the signal is wrong leaving the source of the input FET. Changing the FET makes no difference. Neither does removing the input clamp diode.

Now there are only half a dozen passives left*: three R's plus 3 C's. All the R's check out OK. In desperation I change the entire assembly, and the signal came good. The culprit was the 1.8pF capacitor to ground (C212). It measures close to 18pF on a simple digital capacitance bridge, and I did wonder if this component has been incorrectly marked and somehow got through the Tek system undetected. However, further investigation revealed that this "capacitor" really has failed in a most unusual manner: here are the results of a few tests:-

DVM ohms: (overload)
Insulation tester: 10Gohm @ 100V DC
Digital capacitance meter: 22pF
ESI LCR-bridge: 12.5pf // 80n Siemens @1kHz (i.e.12Mohm approx)

Two similar styles of NOS tubular ceramic both measured their nominal cap. value and 0nS, so clearly the Tek part has failed high capacitance and high loss, (either series esr or some kind of dielectric fault).

So, next time you're up against some weird fault, don't discount the humble and lowly-stressed ceramic caps!

John

* PS will post some photos under 7A18.



Re: Tek 2432A repair

Paul Amaranth
 

Not surprising, given the application. I'd appreciate substitutes.
The Tek number is 152-0398-00, that might cross to a 1n4935. Mouser
stocks those at $0.06 each, quantity 1.

On Tue, Dec 04, 2012 at 04:13:24PM -0600, David wrote:
I agree. I only have the 2440 schematic in front of me but based on
it, those diodes need to be fast recovery rectifiers or better. Most
1N400x series will fail in that application and they certainly are not
specified for it.

I may take a closer look for suitable substitutes later.

On Tue, 4 Dec 2012 21:52:16 -0000, "David C. Partridge"
<david.partridge@perdrix.co.uk> wrote:

I don't think regular 4007s will survive, I think you need UF4007 or similar fast recovery diodes.


Regards,
David Partridge
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf Of Paul Amaranth
Sent: 04 December 2012 20:39
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Tek 2432A repair

:

so I put in a couple of 1n4007.
:

I think one of the diodes shorted again.
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@AuroraGrp.Com | Unix & Windows


Re: Tek 2432A repair

 

I agree. I only have the 2440 schematic in front of me but based on
it, those diodes need to be fast recovery rectifiers or better. Most
1N400x series will fail in that application and they certainly are not
specified for it.

I may take a closer look for suitable substitutes later.

On Tue, 4 Dec 2012 21:52:16 -0000, "David C. Partridge"
<david.partridge@perdrix.co.uk> wrote:

I don't think regular 4007s will survive, I think you need UF4007 or similar fast recovery diodes.


Regards,
David Partridge
-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf Of Paul Amaranth
Sent: 04 December 2012 20:39
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Tek 2432A repair

:

so I put in a couple of 1n4007.
:

I think one of the diodes shorted again.


Re: Tek 2432A repair

 

I don't think regular 4007s will survive, I think you need UF4007 or similar fast recovery diodes.


Regards,
David Partridge

-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf Of Paul Amaranth
Sent: 04 December 2012 20:39
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Tek 2432A repair

:

so I put in a couple of 1n4007.
:

I think one of the diodes shorted again.


TDS644A Advice needed

g4gjl@btopenworld.com <g4gjl@...>
 

I am presently working on a TDS 644A which fails its power-on tests Thus:

ACQ : FAIL
ATTEN / ACQ :FAIL

There are no displayed waveforms though as I run through various controls, occasional triggering occurs, as indicated by front panel LED.

I havnt yet opened the scope,but guess there is a multiplexer associated with the four channel inputs to the video processing circuitry, and also either a single or four separate A to D convertors.

Can anyone confirm in block diagram granularity, the signal path from attenuator to video processing stage?

I assume TEK never released any technical information or servicing manual or similar info for this scope.

Any help would be appreciated

Pete


Re: tek 2246 Mod A SMPS failure

Priya Jakatdar
 

I found the problem - the switching transistors Q2209/10 alternatively pulling current from the 44 VDC rail to the switching power FET are shorted out at their C-E junction. To further validate my theory, I injected a 2V constant current power supply signal into the 44 VDC rail and it is completely shorted to the Q2214 FET Drain, pulling as much current as I will allow - I stopped at 100 mA not wanting to damage anything. The CE voltage was just 20 mV at that point.

Looks like Tek realized that this is a recurring issue because my SMPS has a jumper between the Q2209/2210 emitters and the Q2214 Drain as if to almost suggest to try cutting that first when there are SMPS issues. I will do that to verify the issue before thinking about repairs. I am also looking for some way to verify that the Q2214 FET and T2204 transformer work before I proceed further.

I wonder if a fusible link or 3A fast burn fuse would work in place of the jumper, so these transistors will be protected.

More to come,

Priya.

--- In TekScopes@yahoogroups.com, "Mover" <priya_jakatdar@...> wrote:

I separated out the SMPS from the main board and measured resistance.

(1) None of the SMPS diodes are shorted or open.
(2) None of the SMPS transformer secondary windings are shorted or open.
(3) None of the SMPS low voltage supply capacitors are shorted. I am looking around to see if any of my buddies has a in-circuit capacitance ESR tester, but that appears to be a long shot given that the SMPS failure occurred following a main board chip failure.
(4) The resistance measurements are fine and shown below in sequence (Both, Board alone, SMPS alone) for each supply line. HIGH means over 5 Mohm. No obvious shorts anywhere.
(a) +5V (95 ohm, 95 ohm, HIGH)
(b) line-trig (77 ohm, HIGH, 77 ohm)
(c) -5V (41 ohm, 41 ohm, HIGH)
(d) -15V (575 ohm, 750 ohm, 2300 ohm) - 2300 ohm fan in the SMPS.
(e) +15V (480 ohm, 583 ohm, HIGH)
(f) +7.5V (134 ohm, 134 ohm, HIGH)
(g) -7.5V (143 ohm, 143 ohm, HIGH)
(h) +55V (HIGH, HIGH, HIGH)
(i) +130V(10 Kohm, 10 Kohm, HIGH)
(j) 130VAC (2.9 ohm, HIGH, 2.9 ohm) - transformer winding
(5) I applied 5V to the main board with a Kikusui Constant Current DC power supply, gradually increasing the current limit to 100 mA on each of the supplies. The 5V and -5V lines draw increasing current and the supply voltage rises nicely and smoothly from 0 to 3V as I allow up to 100 mA of current. The other load lines hardly draw any current at all at 5V. No hard short on the main board would exhibit this pattern.

I am back to thinking this is an internal SMPS issue where I am too fearful of the high voltages to attempt anything more than a resistance check. I will post my resistance measurements summary with any findings.

As always, I appreciate any and all input from the community on this.

Priya.

--- In TekScopes@yahoogroups.com, "Rob" <rgwood@> wrote:

"Thanks for helping me think through an alternative approach."

Tis indeed the reason I remain a highly satisfied and sometimes active forum
member. It is like a little family where everyone has a unique perspective
and I enjoy them all..

Your welcome and Thank you back for understanding my "come from".
Rob

-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of Mover
Sent: Sunday, December 02, 2012 1:39 PM
To: TekScopes@yahoogroups.com
Subject: [TekScopes] Re: tek 2246 Mod A SMPS failure

Hi Rob,

I had measured resistance earlier at all secondary supplies and within the
SMPS and they appeared to be OK, offering no clue. However, in circuit
resistance measurements can be misleading as noted in other posts.

You now make two great points neither of which require the firing up of the
SMPS: (1) Measure main board and SMPS resistance after disconnecting the
SMPS and (2) Inject external power into the main board to troubleshoot it
further should it have a short.

I will do both and report findings without messing with the SMPS and the
risk of the high voltages especially with the CRT filament and anode.

Thanks for helping me think through an alternative approach.

Priya.


Re: OT: Identifying UNC(?) screw

 

Thanks to everyone who replied.
In the end it was as simple as going to Lowes and buying a pack of 5 for
$1.40.
I sent off the screws to David today.

Dennis

-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com] On Behalf
Of John S
Sent: Tuesday, December 04, 2012 12:54 PM

Dave:

If this is (just) to hold a foot, why don't you use a length of say 3mm
studding with a nut on the end: I'm assuming you could get the thread to
engage sufficiently to grip.

John

--- In TekScopes@yahoogroups.com, "David C. Partridge" <david.partridge@...>
wrote:

I am the OP ... and live in the UK

I'm waiting on someone else who made the same offer, and don't want to get
lots of folks sending them to me in the UK

I'll follow up with you if that's OK if the first person doesn't come
through.

Thanks
Dave


Learning from experience......the tale of the ceramic C

John
 

Well, there I was, "fixing up" a 7633.

There are two 7A18 amplifiers to align.

One channel has an appalling square-wave response: all over the place as you select various attenuator settings.

With the attenuator out (5mV/div) the response is way down at HF.

After a bit of head-scratching it becomes apparent that the signal is wrong leaving the source of the input FET. Changing the FET makes no difference. Neither does removing the input clamp diode.

Now there are only half a dozen passives left*: three R's plus 3 C's. All the R's check out OK. In desperation I change the entire assembly, and the signal came good. The culprit was the 1.8pF capacitor to ground (C212). It measures close to 18pF on a simple digital capacitance bridge, and I did wonder if this component has been incorrectly marked and somehow got through the Tek system undetected. However, further investigation revealed that this "capacitor" really has failed in a most unusual manner: here are the results of a few tests:-

DVM ohms: (overload)
Insulation tester: 10Gohm @ 100V DC
Digital capacitance meter: 22pF
ESI LCR-bridge: 12.5pf // 80n Siemens @1kHz (i.e.12Mohm approx)

Two similar styles of NOS tubular ceramic both measured their nominal cap. value and 0nS, so clearly the Tek part has failed high capacitance and high loss, (either series esr or some kind of dielectric fault).

So, next time you're up against some weird fault, don't discount the humble and lowly-stressed ceramic caps!

John

* PS will post some photos under 7A18.


Re: OT: Identifying UNC(?) screw

John
 

Dave:

If this is (just) to hold a foot, why don't you use a length of say 3mm studding with a nut on the end: I'm assuming you could get the thread to engage sufficiently to grip.

John

--- In TekScopes@yahoogroups.com, "David C. Partridge" <david.partridge@...> wrote:

I am the OP ... and live in the UK

I'm waiting on someone else who made the same offer, and don't want to get lots of folks sending them to me in the UK

I'll follow up with you if that's OK if the first person doesn't come through.

Thanks
Dave


Tek 2432A repair

Paul Amaranth
 

So I picked up this 2432A and it came in dead as a doornail - no
lights, no fan, nothing. Great joy - somebody was in it before me.
Lots of missing hardware and a number of diodes were obviously
replaced. Two of those appear to have been shorted (CR751 and CR750 on
the PS board). Those were 200V 1A, so I put in a couple of 1n4007.
Crank it up and now I have positive voltages, but no negative ones.
Track that to a bad connection/trace on one of the replacements. Fix
that and try again.

The scope comes up, passes self test and then the screen gets a bit
brigher, then dimmer, then brighter then dimmer then pffft! dead again.
I think one of the diodes shorted again.

Looks like I may have a partially failed component somewhere, not
enough to kill the power supplies outright, but enough to make 1A
diodes look like fuses.

Two questions: Anyone have any resistance readings for the PS rails on a 2432?

And, anyone have recommendations for PCB repair kits? I may have to fix a couple
of plated through holes. Looks like Best and Pace make kits, any others?

thanks
--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@AuroraGrp.Com | Unix & Windows


How to remove 2465 vert preAmp hybrid?

iglesia_cristiana_arpas_eternas
 

Hi , I was removed the 4 nuts, but the heathsink remain fixed.
Is any other fixing elements or just sticked by thermal grease or else?.
Could I apply "necessary" force or not?.


I have an erratically up jump beam of 2 division on the position of channel 1.
But turn the vertPos pot end to end fix the problem until next time appear again, my first suspicious is the pot itself, my second is the U100 hybrid ...what yours third one?.

My goal is try to swap the hybrid to see if the jump follow the swap or not (I hope not) in order to discard hybrid failure , and find the failure in peace mind.

Any clue or ideas about this behavior ?.

Regards and thanks in advance Gabriel.


I have a 575 with tons of extras that is in fabulous condition.............

 

.......and surplus to my needs.

Any takers?

Cleveland, OH, USA

Cheers,

David


Re: Tektronix 2215 crt [1 Attachment]

 

An analog TV will not work for that but another oscilloscope in X-Y
mode would. You can probe along the vertical and horizontal amplifier
chains (or at the CRT plates but I would try to probe earlier) after
the channel switches to generate a display good enough for diagnostic
purposes. I actually did something like this to my 7603 using a DSO
so I could record a curve tracer display.

If you do the above, either use differential probes or do NOT connect
the single ended probe ground lead to one side of the differential
signal. If using single ended probes, connect the ground lead to the
real signal ground and not to one side of the differential signal
path.

I have really grown to like my 7603 and I think it will do everything
a 2215 will do even without any fancy plug-ins. Based on my
experience fixing a friend's 2215, I would prefer the older 7603.

On Tue, 4 Dec 2012 07:50:17 -0500, Chris G <tikitoteam@gmail.com>
wrote:

this are the tek 7603

On Tue, Dec 4, 2012 at 7:24 AM, tikitoteam <tikitoteam@gmail.com> wrote:

**


Hi guys,thanks for all the help....
I have a tektronix 2215 with broken crt,it powers up and seem to run i
wanna ask you if is any circuit in the forum or if it's possible connect it
to a analog tv and be able to run a test or see if the unit work and
produce a display.
The reason i wanna have for my use and i wanna know if deserve invest on a
crt for it...thanks in advance.....
I want to thanks all the guys that help on my tek 2465 it is almost
done,just waiting for parts i will post results when get done....Chris


Re: 2465 A5 board schematics half is missing in my manual!!

Artekmedia <manuals@...>
 

Never worked on a 2465 directly ...so someone else will have to help you with the exact problem you are seeing

I would start a new thread which has the problem in the subject line if I were you

By the way, the A5 Board  part number should start with "670" ( 670-7279-00? )

Dave
Artekmanuals.com

On 12/4/2012 12:03 PM, iglesia_cristiana_arpas_eternas wrote:
 


David here the data you request serial #B010176 A5 part#GC7719-01
Also is a DIP board no SMD, But please forget about schematics.
I was looking for a sample and hold which I supposed drive the pos vert voltage, but not, as you say, this signal is directly derived from the front panel wiper pot .
This mean ,my manual is right.

Thanks you very much for your kindly concern!!
I'm still in trouble with this sporadically 2 division up jump ..any clue or tip?.
Regards Gabriel.
--- In TekScopes@..., Artekmedia wrote:
>
> The Postion Controls are on the right hand side of schematic #3
> @J651...They go from there and "loop" though Schematic #2 on lower left
> hand side J651/P511 and go from there on to schematic #4 lower left, at
> J511 where the actual circuity is.
>
> Dave
> Artekmanuals.com
>
> On 12/4/2012 11:15 AM, iglesia_cristiana_arpas_eternas wrote:
> >
> > Hi Dave!! my manual has two A5 schematics , must be tree?, since I
> > cant find the vert pos circuits in any of this two entitled :
> > (partial A5 control board.Processor and digital control.)
> >
> > (partial A5 control board.Analog control.)
> > But is easy to find in my 2465B service manual, unfortunately is not
> > the same board.
> > Regards Gabriel.
> >
> > --- In TekScopes@... ,
> > Artekmedia wrote:
> > >
> > > What is the serial number of your scope and what is the part number on
> > > your A5 Board? This information will help everyone get you the correct
> > > information
> > >
> > > Is your manual an original paper manual or a PDF?
> > >
> > > Dave
> > > ArtekManuals
> > >
> > > On 12/4/2012 9:32 AM, iglesia_cristiana_arpas_eternas wrote:
> > > >
> > > > My manual 070-3831-00 group38 not show all A5 schematics.
> > > > I have trouble with chann(1) position jumps.
> > > >
> > > > I need the missing half schematic in order to follow the flaw...from
> > > > vert preAmp hybrid to sample&hold position voltage.
> > > >
> > > > Also ..how to remove this vert hybrid ? in order to swap with
> > > > chann(2)without broken anything...any tip about?.
> > > >
> > > > I will be very gratefully if some one could help me.
> > > > Regards Gabriel.
> > > >
> > > >
> > >
> > > --
> > > Dave Henderson
> > > Manuals@
> > > www.Artekmanuals.com
> > > PO Box 175
> > > Welch,MN 55089
> > > 651-269-4265
> > >
> >
> >
>
> --
> Dave Henderson
> Manuals@...
> www.Artekmanuals.com
> PO Box 175
> Welch,MN 55089
> 651-269-4265
>


-- 
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265


Re: 2465 A5 board schematics half is missing in my manual!!

iglesia_cristiana_arpas_eternas
 

David here the data you request serial #B010176 A5 part#GC7719-01
Also is a DIP board no SMD, But please forget about schematics.
I was looking for a sample and hold which I supposed drive the pos vert voltage, but not, as you say, this signal is directly derived from the front panel wiper pot .
This mean ,my manual is right.

Thanks you very much for your kindly concern!!
I'm still in trouble with this sporadically 2 division up jump ..any clue or tip?.
Regards Gabriel.

--- In TekScopes@yahoogroups.com, Artekmedia <manuals@...> wrote:

The Postion Controls are on the right hand side of schematic #3
@J651...They go from there and "loop" though Schematic #2 on lower left
hand side J651/P511 and go from there on to schematic #4 lower left, at
J511 where the actual circuity is.

Dave
Artekmanuals.com

On 12/4/2012 11:15 AM, iglesia_cristiana_arpas_eternas wrote:

Hi Dave!! my manual has two A5 schematics , must be tree?, since I
cant find the vert pos circuits in any of this two entitled :
(partial A5 control board.Processor and digital control.)

(partial A5 control board.Analog control.)
But is easy to find in my 2465B service manual, unfortunately is not
the same board.
Regards Gabriel.

--- In TekScopes@yahoogroups.com <mailto:TekScopes%40yahoogroups.com>,
Artekmedia <manuals@> wrote:

What is the serial number of your scope and what is the part number on
your A5 Board? This information will help everyone get you the correct
information

Is your manual an original paper manual or a PDF?

Dave
ArtekManuals

On 12/4/2012 9:32 AM, iglesia_cristiana_arpas_eternas wrote:

My manual 070-3831-00 group38 not show all A5 schematics.
I have trouble with chann(1) position jumps.

I need the missing half schematic in order to follow the flaw...from
vert preAmp hybrid to sample&hold position voltage.

Also ..how to remove this vert hybrid ? in order to swap with
chann(2)without broken anything...any tip about?.

I will be very gratefully if some one could help me.
Regards Gabriel.

--
Dave Henderson
Manuals@
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265
--
Dave Henderson
Manuals@...
www.Artekmanuals.com
PO Box 175
Welch,MN 55089
651-269-4265

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