Welcome to the AudioShark Forums.
Results 1 to 4 of 4
  1. #1
    Junior Member
    Join Date
    Mar 2022
    Location
    Washington State
    Posts
    2

    Daughter board for a CAV-180

    Greetings,

    First time post, new member. I just acquired the above amp from a friend of mine who said that channel 4 was causing this amp to go into protection mode. After a couple hours of testing the final stage transistors via the service manual then swapping the daughter boards between one module and another I found that the culprit is the daughter board. I previously emailed Classe' support about acquiring a amp module to which they said that they don't supply the 'kits' anymore but would sell the individual output transistors (matched set) once I found out which ones were the problem, which in this case is not the issue. I know this amp is over 20 years old but would you pass the chance to fix a $3000 amp someone GAVE you?
    So it looks like there's no way to get this amp working unless someone has one for parts or someone here on this forum may 'know a guy who knows a guy'.
    Any info would be appreciated.

  2. #2

    Re: Daughter board for a CAV-180

    Quote Originally Posted by DaveH View Post
    Greetings,

    First time post, new member. I just acquired the above amp from a friend of mine who said that channel 4 was causing this amp to go into protection mode. After a couple hours of testing the final stage transistors via the service manual then swapping the daughter boards between one module and another I found that the culprit is the daughter board. I previously emailed Classe' support about acquiring a amp module to which they said that they don't supply the 'kits' anymore but would sell the individual output transistors (matched set) once I found out which ones were the problem, which in this case is not the issue. I know this amp is over 20 years old but would you pass the chance to fix a $3000 amp someone GAVE you?
    So it looks like there's no way to get this amp working unless someone has one for parts or someone here on this forum may 'know a guy who knows a guy'.
    Any info would be appreciated.
    The saying goes: You don't look a gift horse in the mouth. But in this case, the "horse" is dead. You already know that the manufacturer is no longer supporting that amp (don't blame them! After all, the amp is over 20 years old). So even if you were able to find a broken amp that you can buy for parts, how would you know that the part that you need is working properly? Personally, I would pass.

  3. #3
    Junior Member
    Join Date
    Mar 2022
    Location
    Washington State
    Posts
    2

    Re: Daughter board for a CAV-180

    Thanks for the reply, nicoff. After working on that daughter board and measuring transistors other components I found that there was an open resistor on the 'solder-side' of the board that had opened up. My friend, who works on and rejuvenates old TV's and radios, happened to have a resistor of same value and wattage rating. Works like a champ now!!
    Now all I have to do is figure out why the Subwoofer Out, from the SSP-30 processor, doesn't have a signal. Will probably have to connect my sub to the processor through the speaker connections instead of the RCA.

  4. #4

    Re: Daughter board for a CAV-180

    Quote Originally Posted by DaveH View Post
    Thanks for the reply, nicoff. After working on that daughter board and measuring transistors other components I found that there was an open resistor on the 'solder-side' of the board that had opened up. My friend, who works on and rejuvenates old TV's and radios, happened to have a resistor of same value and wattage rating. Works like a champ now!!
    Now all I have to do is figure out why the Subwoofer Out, from the SSP-30 processor, doesn't have a signal. Will probably have to connect my sub to the processor through the speaker connections instead of the RCA.
    Sounds great!
    You can try connecting a "Y" RCA splitter cable (1 male to 2 female) to the SSP to split the output signal of the main speakers. But don't forget to send full signals to the main speakers!

AudioShark - The Best High End Audio Discussion forum.

AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.

The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.

At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.

We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!

Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com

Audioshark is a community of like minded individuals. Audioshark welcomes participation from all manufacturers and owners of all brands and products. It is our belief that online forums provide a community of like minded audiophiles and music lovers to encourage the growth of this wonderful hobby.

Sincerely,
The Audioshark.org Team

Daughter board for a CAV-180

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •