Hello,
I do not have the CD-100C manuals, but there should be two manuals, I have the full 100A, 100B, 100, 100F etc.
Part 1 covers Installation , Programming, Routine Service.
Part 2 covers OBA-2 Maintenance, Troubleshooting, Adjustments and the Parts Catalog.
You will need part two
The Display assemble part number is 40832303 there is a number of Ebay dealers who are selling these now.
Item number: 120575958024
Item location: Manheim, PA, United States
This is the wrong number but should be ok it is on a BIN at $52.50
Item number: 110422074098
Item location: Manheim, PA, United States
Correct number BIN $77.00
Item number: 120491024535
Item location: Manheim, PA, United States
BIN $77.00
Item number: 110455816970
Item location: Manheim, PA, United States
Correct number BIN $77.00
As you can see these are by athe same seller, I have emailed them in the past re parts and given them advice, so you should be ok dealing with them.
Regards
Alan Hood
ami-man
UK