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CR-840 schematic in 6 parts

R

ring

AK Subscriber
Subscriber
I haven't been able to find the CR-840 schematic out on the webs.

All the service manuals I've found online are from the same scan and they are missing pages 13 and 14 which contain the schematics. They also contain two extra pages of circuit board images inserted between p10 and p11 which are from an unrelated machine.

I can't fix the old SM scan, but I can offer the missing schematic in colour in 6 parts. Not much of an image editor, so I haven't tried to join them. If anybody can do so, please post it.

For those who are brave enough to tackle the 840 in spite of the IG/STK parts issues, I hope this helps!


EDIT, I figured out a way to shrink the files without touching resolution. Adding parts 1-3...

Originally 3 of the 6 files gave me a "too large" error, so you can DL the set of 6 in a zip file here. Possibly less dithering on those
 

Attachments

  • small Schematic part 1.png
    small Schematic part 1.png
    772 KB · Views: 70
  • small Schematic part 2.png
    small Schematic part 2.png
    756.8 KB · Views: 58
  • small Schematic part 3.png
    small Schematic part 3.png
    709.1 KB · Views: 55
  • small Schematic part 4.png
    small Schematic part 4.png
    784 KB · Views: 56
  • small Schematic part 5.png
    small Schematic part 5.png
    850 KB · Views: 59
  • small Schematic part 6.png
    small Schematic part 6.png
    602.4 KB · Views: 57
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ring .... I am one of those silly fools willing to attempt to tackle the CR-840 ... Just wondering if you have a Kinkos or similar print shop in your area ... I would be willing to compensate your efforts next tuesday for a copy today
 
Also when you zoom in on the pics ... you can see through the print ... looks like the parts layout
 
just saw this . thanks . managed to make a D sized print in color maybe larger ! was a great help unit is now up and running . THANKS for your help
 
For anyone else struggling with the CR-840 service manual saga, I just bought a PDF scan from Analog Alley and it's the right one (with the proper schematic pages) and is very high quality, color, etc. That version floating around with the wrong pages in the middle had me stumped for a while :-)
 
tommch said:
For anyone else struggling with the CR-840 service manual saga, I just bought a PDF scan from Analog Alley and it's the right one (with the proper schematic pages) and is very high quality, color, etc. That version floating around with the wrong pages in the middle had me stumped for a while :)
Click to expand...
And a one page schematic in high resolution.
 
tommch said:
For anyone else struggling with the CR-840 service manual saga, I just bought a PDF scan from Analog Alley and it's the right one (with the proper schematic pages) and is very high quality, color, etc. That version floating around with the wrong pages in the middle had me stumped for a while :)
Click to expand...
I just rebuilt a CR-1040. It was a "freebie" and too good looking to toss. I had all the necessary parts including the STK modules on hand. The owner must have been cranking it :rockon:when it blew. The first time I saw a ceramic cap exploded right next to an STK.
 
Skywatcher said:
I just rebuilt a CR-1040. It was a "freebie" and too good looking to toss. I had all the necessary parts including the STK modules on hand. The owner must have been cranking it :rockon:when it blew. The first time I saw a ceramic cap exploded right next to an STK.
Click to expand...
Sometimes you wanna be in the room when it happens...Other times, no, not really.
 
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