[Arun Narula]

Dear Friends :- Need help on a service manual for a cayin 500 that came in for service with two 10 Ohm resistors burnt on the output stage of the amps . would like to replace them but also check the biasing currents after doing so to avoid a repeat of the same
Thanks

[JerryM]

Welcome to AudioCircle, Arun. 

[Phil A]

Welcome to AC!

[Phil A]

I believe the below is the current US Importer (if not in the US, then you'll need to contact someone else) - http://www.usatubeaudio.com/cayin-a88t-mkii.php

[Phil A]

Believe their email is  info@cayin.com

[brooklyn]

[FullRangeMan]

Dear Friends :- Need help on a service manual for a cayin 500 that came in for service with two 10 Ohm resistors burnt on the output stage of the amps . would like to replace them but also check the biasing currents after doing so to avoid a repeat of the same
Thanks

Service manuals from sino amps are rare on the webb, you dont need a service manual from this amp, unless you can read Cantonese or Mandarim language, as you are in India you need a service shop in you country.
Email the factory here (tech support address) and ask help to service it in your country or yourself that seems is your purpose:
http://en.cayin.cn/contact.asp
Good luck