Jump to content
Main menu
Main menu
move to sidebar
hide
Navigation
Main Page
Community portal
Village Pump
Recent changes
Upload file
Help
Help contents
Editing guide
Writing a repair guide
Sandbox
Browse Wiki
Service Manuals
Apple
Nintendo
Sega
Troubleshooting
Search
Search
Appearance
Create account
Log in
Personal tools
Not logged in
Talk
Contributions
Create account
Log in
Editing
DECmate II Documentation
(section)
Page
Discussion
English
Read
Edit
Edit source
View history
Tools
Tools
move to sidebar
hide
Actions
Read
Edit
Edit source
View history
General
What links here
Related changes
Page information
Appearance
move to sidebar
hide
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
== H7842 power supply schematic (Tony Duell) == A hand-drawn schematic of the H7842 supply, six A4 sheets, reverse-engineered by Tony Duell and distributed through bitsavers.<ref name="duell" /> The PDF holds a wiring drawing of the supply, fan and switch in the Rainbow, three PSU sheets (sheet 1 the mains rectifier, start-up supply and output connectors; sheet 2 the chopper and its driver; sheet 3 the DC outputs, crowbar and β12 V regulator) and two control module sheets. It gives component values but no voltage ratings. One repairer reports that two sections of comparator E3 appear to be mislabelled.<ref name="rob1" /> <pdf width="800" height="500">File:DEC H7842 Power Supply Schematic (Tony Duell).pdf</pdf> Download: [[:File:DEC H7842 Power Supply Schematic (Tony Duell).pdf|DEC H7842 Power Supply Schematic (Tony Duell).pdf]]
Summary:
Other contributors may edit, change or remove anything you write here. Text you write is released under CC BY-SA 4.0 and the GFDL; see the
Terms of Use
.
If you add copyrighted material, such as text or pages from a manual, cite it: give the source, the author or publisher, and the copyright holder. See
RetroTechCollection:Copyrights
.
Cancel
Editing help
(opens in new window)
Search
Search
Editing
DECmate II Documentation
(section)
Add topic
