I need the wiring diagrams for the DPS-270 and DPS-175 time base correctors

How to check whether the DPS 320-1A HP SMPS is working with out connecting it in to the motherboard

Which delay timer do you have? 9 pin, 11 pin, etc?
What voltage are you using?
What is amp rating on timer?

Copy following links for general and specific wiring diagrams:
http://waterheatertimer.org/How-to-wire-pin-timers.html
http://waterheatertimer.org/images/10-pin-wiring2-1000.jpg
http://waterheatertimer.org/images/ON-delay-timer-diagram-900.jpg

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Gene
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If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Pin configurations are available on the web site. Go to Support and input the data they require. Download the manual and your in business.

The focus knob turns on a threaded rod which passes through a focus lever, which is secured to the back of the primary mirror. The end of the rod where it passes through this lever is secured by 2 jam nuts, one of which has probably fallen off.
http://ngc1514.com/Celestron/disassem.htm

To fix this you will have to take the front corrector plate off, find the nut rattling around in there, and tighten it back onto the end of the focuser rod, as shown in the diagram. I'd use a little Loctite as well.
This is not difficult, and you can clean the inside of the corrector plate while you have it off. The only precaution is to mark where the corrector plate was, and replace it at the same orientation. Some opinion has it as being worthwhile to also get the secondary mirror centered on the corrector, and the corrector then centered in the end casting. An accurate rule or vernier calipers can be used. Don't tighten the screws on the corrector plate retaining ring much more than hand tight.
http://www.astromart.com/articles/article.asp?article_id=594

http://www.darkatmospheres.com/music/C11_Project/index.html

http://www.celestron.com/c3/support3/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1655&nav=0,214

http://www.nexstarsite.com/OddsNEnds/SCTCorrectorRemoval.htm

http://www.laughton.com/paul/rfo/c11-disasm.html

visit www.mobileinformationlabs.com

Your clock motor is not correctly wired to the terminal block. Carefully review the connection diagram for the line and load leads and the timer clock leads. Somewhere in there you made a mistake when connecting the wires. If not there is a defect in the clock mechanism and you should replace it. For warranty information please refer to the instructions or the place you purchased it from for assistance.

John

Nema 1 means indoor-only enclosure or box.
For example Nema 3R is raintight for indoor-outdoor box, which is typical for outdoor swimming pool timers.

If you have water heater timer, open following page for common timers with images, manuals and wiring for each.
http://waterheatertimer.org/Boxtype.html

I would not try to remove the corrector plate-- the manual states to return the scope to Celestron if the inside of the corrector needs cleaning.

If removed the corrector has to be replaced in the EXACT position it was in before you took it apart-- the alignment between the front corrector plate and the rear mirror and the secondary mirror was done on an optical bench at the factory.

I doubt that will you notice or be able to see the small stain while you are observing--

Timers are a waste of time . I would disconnect it and get rid of it. Water heaters nowadays are so energy efficient and the thermostats take care of when it heats and shuts off. Your timer might save you pennies a year!

I went to Google and entered Dictaphone 0421 + manual. Took me to a website titled FREE DICTAPHONE C-phone 0421/0424 manual. This lead to MT Stars, with link at bottom of page for manual download. It worked for me. I saved it into My Documents