1. One of the fans in my DCM3800L is not spinning, is that normal?

No, that is not normal. Both fans in the back of the DCM3800L should be spinning to cool down the amp. Unlike the old DCM, on the new DCM(L) series, the fans are side by side, and they both spin, when hot the fans run faster.

For a replacement fan click this link:DCM FAN Replacement

For the service form click this link:RMA FORM For repair or Exchange.

2. Where can I find information on my DCA800?

Please click this link for the Manual, it includes the schematic.

DCA300/700/800 MANUAL

For the original 1987 post click this link:

DCA300/700/800 (1987)

3. Do you sell replacement PCB boards or Modules?

No, Carvin doesn't. We do offer replacement heads (amps) for some of our amps, like the AG100D for example, as a replacement. We also offer upgrades, see "Service Exchange" for trade in price.

4. Is the heat sink on my DCM always charged?

Yes, the heat sink is connected to the reservoir caps, they will stay charged until discharged, don't touch heat sink or capacitors. If you must remove a fan to replace it, discharge the heat sinks with a discharging tool first. The fan is usually connected to the heat sink via 4 screws.

5. How much is it for the Schematic of a Carvin Amp?

All Carvin Schematics are free.

6. What is Thermal Protect?

Thermal Protect is a protection built into Carvin Amps to protect them from too much heat. The way it works is, when the temperature reaches a critical point an output relay is turned off, to let the amp cool down. If the fan is blocked or if the room temperature is hot, the amp may go into protect. Wait for it to reset, when the temperature comes down to a safe level the relay will turn back ON. If the amp goes into thermal protect with in 5 to 10 minutes of playing check the fan, it may have stopped working.

7. What is Short Protect?

Carvin Amps have a feature called Short Protect, in layman's terms, if the output is shorted, be it a speaker, cable or jack, the amp is designed to go into protect. If the amp is working fine and when you plug a cable in the output, the amp goes into protect, one of the two is shorted, either the speaker or the cable.

8. Why is my amp going into protect when I plug in my speaker?

Your cable or speaker may be shorted, the amp is designed to protect when that is the case. Try a different speaker and or cable.

9. What is the direction of the air flow in my DCM4000?

The air flows from the back to the front. Only the front fan spins until the amp gets really hot then both the front and the back spin really fast to cool it down.

10. With all the power amp classifications, there may be terms you are unfamiliar with, so this document contains a brief description of Carvin's professional power amplifier designs and terminology.

Click this link for a Description of the most common terms.
Carvin Professional Power Amp Design.PDF

11. How should I box my amp to send it in for repair?

The amp should be boxed up in its original packaging. If that is not possible, then box it up as best you can. Make sure to leave a protective cushion between the amp and the box. During shipping the amp will be exposed to rough handling. If improperly boxed, the unit will be damaged. Carvin is not responsible for shipping damage due to improper boxing. Remember to fill out your RMA form.

12. What is the AC Cord wire gauge I should use with my amp?
13. How to open the Guitar Tweed Case, or Black case.

Slide the lock (round circular part of the lock) to the left to open case. Like indicated in the picture, and the lever will pop out.

The case will not be locked, the key is inside the case. On the right hand lock slide to the right.

Click on link, to see video: How to open guitar case.

14. What does a bad tube look like? How do I know if my tubes are good or not?

Look at this picture above, the two tubes on the left are bad. The two on the right are good.

Note the red glow on the two tubes on the Left side. It's best to replace all 4 tubes when this happens, you will have to Bias the amp. We have instructions on how to Bias your amp, on the "How to Bias" tab.

If your amp is under warranty, call customer service at (800) 854-2235 for a new set.

15. Does Carvin offer a trade in for the wireless that will not work after June, 2010 because of the frequency used?

Carvin offers a 100 Dollar credit towards a replacement system, which are in the 638-698Mhz range(NEW), older is (700-800Mhz). You don't have to send in your old wireless. The credit applies to any owner not just the original owner. A serial number must be provided. Valid until Jan, 2013. Please call Carvin Sales at 800-854-2235

16. What is the availability of the AG100D Chassis replacement.

AG100D Replacement Chassis:
Availability: Please call a head of time, before going to the Carvin Store to pick it up. Units upon request will be available on Thursdays if requested with sufficient time of notice.
San Diego Store: (858)487-8700 -1 week availability-

Bring the original amp with you; you don't need to bring the cabinet. It is important that you call a head of time because the amp may not be in stock.

Installation Procedures:
Unplug the Speaker cabinet from the back of the amp. Unplug the power Cord from the Amp. Take out the 4 screws on the top, and then slide the amp out through the front of the cabinet. Reverse for installation.

Carvin Service - 1(800) 854 2235

17. What is the availability of the SX300 Chassis.

SX300 Replacement Chassis:
Availability: Please call a head of time, before going to the Carvin Store to pick it up. Units upon request will be available on Thursdays if requested with sufficient time of notice.
San Diego Store: (858)487-8700 - 1 Week Availability -



Bring the original amp with you; you don't need to bring the cabinet. It is important that you call a head of time because the amp may not be in stock.

Installation Procedures:
Unplug the Speaker cabinet from the back of the amp. Unplug the power Cord from the Amp.

Take out the 4 screws on the back to remove the back cover. Then remove 6 screws on the top of the cabinet, then slide out the amp, through the back of the cabinet. Reverse for installation.

Carvin Service 1(800) 854-2235

18. What is the availability of the SX200 Chassis.

SX200 Replacement Chassis:
Availability: Please call a head of time, before going to the Carvin Store to pick it up. Units upon request will be available on Thursdays if requested with sufficient time of notice.
San Diego Store: (858)487-8700 - 1 Week Availability -



Bring the original amp with you; you don't need to bring the cabinet. It is important that you call a head of time because the amp may not be in stock.

Installation Procedures:
Unplug the Speaker cabinet from the back of the amp. Unplug the power Cord from the Amp.

Take out the 4 screws on the back to remove the back cover. Then remove 6 screws on the top of the cabinet, then slide out the amp, through the back of the cabinet. Reverse for installation.

Carvin Service 1(800) 854-2235

19. Where can I find information on Old Carvin Equipment from the 60s, 70s, 80s.

Try CarvinMuseum.com we have a lot of manuals and schematics from the early years.

20. Where can I find the Return Form?

Click the link below to download the file.

RETURN FORM

For any "return" questions please call 1-800-854-2235

21. Where can I find the Return for Repair Form? (RMA form)

The form can be located at the link below:

Return for Repair form RMA

22. What is the Thiele?

The Thiele specifications are a set of parameters used to describe the audio characteristics of a speaker driver.

23. Can a Carvin Tech Modify my amps if I send them in?

No. Carvin Technicians are not permitted to MOD (modify) any amplifier. It is against company policy. Carvin does not repair modified amplifiers. If a modification is found during a repair, then the component values will be returned to factory specs (if it is not rejected).

24. What is Moisture and Corrosion, and why is that bad?

Moisture is the presence of water in trace amounts. It can cause rot in wood and corrosion in metals, both of which are the main materials in your amplifier and cabinet. When moisture goes inside the amp it can corrode the input and output jacks (causing intermittent crackling, popping, and volume loss), damage the cables inside the amp, and short traces on the circuit boards. If corrosion is present on any of the jacks, the best thing to do is to replace them. For light corrosion, applying contact cleaner to the jacks will help.

25. What do I do if I get Dust or Sand inside my gear?

Dust and/or sand should never go inside the amp. If any debris goes inside try to clean it out as best you can. Dust and sand can block the fan and vents, causing the amp to overheat, and they can also short components inside. Any debris inside the chassis will also absorb moisture and cause corrosion to form on chassis and circuitry.

26. What do I do if my amp gets struck by Lightning?

Lightning can cause extreme and intermittent failures to all electrical equipment. Most of these issues are very difficult to repair and usually return after time. In the case of a direct hit, the amp will likely not work well ever again. If there was a black out for a few seconds and the amp does not power back ON, check the fuse. For a replacement fuse click on "Fuse and Bias Values" in the FAQ Categories menu.

27. When I tap the top of my amp the signal goes in and out, what do I do?

This is a characteristic of something inside the amp being loose. In most cases it is a loose connector, but it can also be dirty or corroded contacts, a bad ribbon cable, or broken solder joints. To check this, take the amp out of the enclosure and verify that all harnesses and connectors are installed correctly. Disconnect and reconnect the ribbon cables. Power on your amp and verify that it is working properly. If the problem persists, you may have to replace a connector and do further troubleshooting. A cable can work its way out from the vibration of a speaker. For a replacement cable click on "Parts".