Yokogawa DL1200A
Okay, as promised and even though it is getting late here (01:22 MEST),
here is the teardown and a little testing of the Yokogawa DL1200A.
First of all: I'm impressed. Why? Well, because of this:
This is the box. Looking suspiciously small and I'm fearing the worst.
![Angry >:(](https://www.eevblog.com/forum/Smileys/default/angry.gif)
![](https://i.imgur.com/mfx2rQ5.jpg)
Let's open the box and yes: no additional packaging material. Zero! None!
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
![](https://i.imgur.com/5ZpmQUA.jpg)
![](https://i.imgur.com/WPguMUo.jpg)
Here is what I've written to the seller and the answer (Google translator is your friend):
Hallo XXX,
das DL1200A ist heute angekommen, Danke Dir.
Allerdings muss ich sagen, dass ich enttäuscht bin über die Art und Weise, wie es verpackt war. Einfach so ein empfindliches Meßgerät in eine Schachtel zu packen, ohne Dämmmaterial, um es gegen Stöße etc. zu schützen, ist grob fahrläassig. :-( Auf die Schachtel zu schreiben "Vorsicht! Zerbrechlich!" reicht nicht und wird in der Regel ignoriert. Das Gerät konnte sich in der Schachtel auch frei bewegen, normalerweise ein Garant dafür, dass es in mehreren Teilen beim Empfänger ankommt.
Ich habe es getestet und es funktioniert. Allerdings ist dieser Umstand nur zwei Dingen zu verdanken: Glück und der Tatsache, dass die japanischen Ingenieure da ganze Arbeit geleistet haben.
Ich wollte eigentlich genau das vermeiden und die Tatsache, dass Du meine Bitte für eine gute Verpackung ignoriert hast, macht mich wütend und traurig zugleich.
Bitte, falls Du wieder so ein Gerät versenden solltest, verpacke es gut! Ausreichend große, stabile Schachtel, dick polstern und so in der Schachtel platzieren, dass es von ALLEN Seiten dick mit Polstermaterial umgeben ist UND es sich in der Schachtel nicht mehr bewegen kann.
Traurige Grüße,
BU508A
The answer:
Hallo BU508A, entschuldige bitte ich dachte die Verpackung wäre ok so. Ich merke mir das für das nächste Mal. Freut mich dass es trotzdem funktioniert hat.
Ist meiner Unkenntnis zu verdanken.
Trotzdem viel Spass damit.
Liebe Grüsse
XXX
![Sad :(](https://www.eevblog.com/forum/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)
First thing I did, I've shaked it a bit. Good. No rattling. The feet, plastics and connectors are looking okay.
Hope increases a bit. Here are the pictures from the outside of it.
Front, back and bottom:
![](https://i.imgur.com/z4Cp5AP.jpg)
![](https://i.imgur.com/SD5s3Nw.jpg)
![](https://i.imgur.com/PJz2Zea.jpg)
Some details:
type label, BNC inputs, thingie, handle
![](https://i.imgur.com/bjZT8SS.jpg)
![](https://i.imgur.com/HLHqQFc.jpg)
![](https://i.imgur.com/baIcvin.jpg)
![](https://i.imgur.com/dNWtmGv.jpg)
Very impressive, this thing is build very sturdy. Good. Hope increases a bit more.
Let's open it and see, what's inside.
First, the electronics for the CRT. It is a bit dusty but besides that very clean. No rust.
![](https://i.imgur.com/O249k20.jpg)
![](https://i.imgur.com/OglRIfy.jpg)
![](https://i.imgur.com/PzABeTH.jpg)
HV area. I took those pictures to scare a bit bd139.
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif.pagespeed.ce._hfWAz_QHO.gif)
![](https://i.imgur.com/2BApL2f.jpg)
![](https://i.imgur.com/y47gl3f.jpg)
![](https://i.imgur.com/pBVlqd3.jpg)
The CRT and some labels, including a date code. This DL1200A has been built in Jan. 1991, 30 years ago.
![](https://i.imgur.com/TblML3u.jpg)
![](https://i.imgur.com/0LqUD5W.jpg)
![](https://i.imgur.com/6Vc8TUz.jpg)
![](https://i.imgur.com/BMWneEg.jpg)
There are several boards for the digital part, pity, they are mostly hidden and I didn't want to take it apart further.
![](https://i.imgur.com/t3Jmj71.jpg)
![](https://i.imgur.com/0d5myXB.jpg)
![](https://i.imgur.com/JGLlvD9.jpg)
![](https://i.imgur.com/RRyYExx.jpg)
![](https://i.imgur.com/OLJ7RkX.jpg)
![](https://i.imgur.com/x8yTCoO.jpg)
Top view of the PSU, very compact design:
![](https://i.imgur.com/WxiQWmP.jpg)
But is it working?
Let's find out.
First boot and CH1 and CH2. Looks good! This thing has survived the trip from Munich to me without any damage so far!
Very impressive!
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
![](https://i.imgur.com/otwSdrN.jpg)
![](https://i.imgur.com/EaQWwPy.jpg)
The display is very crisp and all the functions seems to work!
I've connected my R&S dual arb generator (type: ADS) to the scope and fooled around a little bit.
Signals are sine and triangle, 1kHz, 2Vpp. Sorry for the blurred pictures,
sometimes the cam did not focus on the display and I was too lazy to take new pictures.
![](https://i.imgur.com/j0EoGlW.jpg)
![](https://i.imgur.com/g6ecg6S.jpg)
![](https://i.imgur.com/keyOZSr.jpg)
![](https://i.imgur.com/s5ZOqcu.jpg)
I hope you've enjoyed this little teardown and testing.
I think, I've fallen in love with those Yokogawa scopes. Cute things, a bit unusual in their handling but not illogical.
But now it's bedtime, really tired at 02:14 MEST here ...
![Indifferent :=\](https://www.eevblog.com/forum/Smileys/default/indifferent0023.gif.pagespeed.ce.nyXMDasYXd.gif)