I need a repair manual for a high fidelity Admiral bel air Record
Changer, model number rc637-6E. When powered up the vacuum tube lights
up, so I'm assuming it is something else. The chassis is a 4T2 Model
362.

Just a tad tricky to offer much with little detail. Could you expand?

1) What is your level of technical ability?
2) What test equipment do you have at your disposal?
3) Age of machine?
4) How many valves, and types?
5) Have you checked out the HT?
6) Is it a metal or tube rectifier on the PSU?
7) Do the mechanicals work?
8) Anything else you think relevant.

Best

With a manual my technical abilities would be boosted. Unfortunately I
don't have one, nor any test equipment. Valves? HT? Rectifier? PSU?
Mechanicals? Give me a direction to glean this info from and I will
find these out for you.
thank you.
cheers.

Rather doubt you will find a manual I?m afraid. Very rarely does one
have that luxury when repairing equipment. Basically one has to know
how things are supposed to work, and analyse to find out why they
don?t. All the information you should need is sitting in front of you.
Do you have the basics, such as reading resistor colour codes and
soldering skill.

For testing, you need a multimeter. Do the mechanical systems
function? How many valves and what type numbers are printed on them.
Are any of the valves ?cloudy? at the top. Presumably there is a
transformer -- are the supplies rectified by a valve or plate
rectifier? Just describe the thing in as full detail as you can and
say which bits work and which don?t.

Best