Question about Diamond Audio D5-1200.1 Car Audio Amplifier

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Diamond Audio D5 1200.1 wont power up

I received a Diamond Audio board, D5 1200.1 board. It was missing some surface mount transistors, and might be missing some other parts, I am not sure. I have compared pics of my board to other working boards and it looks the same. When the fuses are removed, there is 13.8 volts throughout the board, but when the fuses are reinserted, the voltage drops to 0.55 or so and there is a buzz from the baord. The protect lights do not come on either. I need a good pic of the board, or some help on where to start troubleshooting. Heard of this before???

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You have a dead short on the board If your missing parts I myself would not bother to fix but if your up to a callenge contact www.diamondaudio.com they can assist you in getting the parts and diagrams for you

Posted on Mar 31, 2006

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Posted on Jan 02, 2017

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2 Answers

If the transistor problem where i get it?if i dont find the original transistor then what can i do?


Transistors are transistors regardless of the make of equipment they are in. Printed on the transistor is the value of it. Most electronic retail shops (Jaycar) will have a replacement unit.

Apr 03, 2013 | Onkyo TX-DS838 Receiver

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I need to put a new volume switch onto my Sony wx-c570r radio. I seem that I can get the part, but I have no idea how it fixes to the radio. Do I need lots of skill?, or is it OK if I am not experienced in...


If you have no experience unsoldering and soldering it is probably not something you can handle. Especially if the switch is what is refered to as surface mounted. A surface mount refers to the fact that there are no pins going to the other side of the board to be soldered there. It takes a bit more skill to solder on a surface mount part than a through hole part.

Jul 28, 2011 | Sony WX-C570R

1 Answer

Sir, I would like to know where I can buy parts for my behringer, I have three and the main amp board is blown. Thanks


The Behringer parts distributor is Fullcompass.com... Lots of luck... I waited six months for a couple pots and capacitors... finally cancelled the order and got scrapped out boards from Ebay to effect the repair.
In regards to the HCA2400 amplifier, I got replacement from FullCompass ($155) BUT Behringer had wrapped anti-static bubble wrap around it so tight it peeled two capacitors off the board and the circuit traces. I now repair the boards myself... it is a lot of work and usually one has to carve out carbonized circuit board where internal arcing has occured and re-insulate and install jumpers to replace the circuit traces. Usually the 9140 transistors are toast and sometimes the 250 as well and a zener gate protection diode. If a cloud of smoke came out, then the 0.03 ohm metering resitor on the bottom is gone as well as two surface mounted transistors that are a part of the current limiter. Most parts are available from online sources... Digikey, Mouser, Allied, Newark, and Avnet.

Jul 04, 2011 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

We have a picture, but no sound. Already confirmed it is not and issue with the cable company.


If you have no audio on either the AV inputs or off-air TV channels, then it is probably in the audio output stage - the audio IC and all components in that part of the board - including surface-mounted ones - as well as dry joints/broken tracks etc. could be a possible cause. It is probably a leaky surface-mounted capacitor, transistor or diode which is preventing the audio from being produced.

This could be an expensive workshop repair, considering the cost of these parts, and the fact that SMD (surface-mount devices) are extremely tiny and difficult to replace, being soldered and glued to the PCB. This type of repair should be undertaken by a workshop - find one who give you a free quote on the likely repair cost, then you can make a decision afterwards on that basis - whether to go any further with it or not.

Jan 24, 2011 | Philips Magnavox TP3285C 32" TV

1 Answer

Hi; my friends blew the power supply board on this desk; will I be able to change individual components or have to fork out 160 euros for a new board? I think I could cope with changing components if...


It is likely one of the amps have blown as well as the power supply. The pwoer supply wipes out about $30 of components when it goes. If the fuse had been replaced after initial failure this results in more damage. For the power supply, typically the two IGBT's are wiped out and the four transistors driving them as well as the regulator chip and one or more of the gate speedup diodes which are surface mounted. Sometimes the surge limit resistors which are ceramic pacakged are blown. The hardest part is removing the heatsinks with the IGBT's on them. You DO need a desoldering station to work on this.
Usually you will find damage to the rearmost amp in the amplifier module. An arc beween layers of the multilayer circuit board causes inital failure. Three MOSFET transistors are blown and a Zener plus the board is charred and this cancer has to be ground away and re-insulated and circuit traces replaced by jumpers. Sometime the .03 ohm metering resistor on the bottom is fried... when that happens, two small surface mounted transistors are blown as well. All in all $50 of components are damaged typically.

Oct 31, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

Loud crack when turning unit on, blows main fuse no lights come on.. bottom of power supply black and signs of burn...


DO NOT REPLACE THE FUSE !!! You will do more damage.

I just repaired one of these. A small ceramic surface mounted cap very near where the +/- 85 volt connectors plug onto the board blew up.

This left a sputtered mess on the insulating material at the right rear corner of the power supply.

The net parts list of parts I had to replace:

1. Main IGBT transistors on heat sinks. You have to remove the heat sinks to get at the mounting screws. 1MBK50D or equivalent. I used DigKey part APT28GA60BD15

2. One 1N4148 surface mount diode that is for gate drive speedup. D24 and D25. (don't remember which one was shorted)

3. All four driver transistors for the gate of the IGBT's. @ each 2SA1020 (PNP) and 2SC2655 (NPN). These are tall TO92-like transistors and I believe that at least one of these I had to get from Mouser.

4. Transistor T9, suface mount BC856B (PNP)

5. Replaced all four surface mount caps, one had exploded.
C50, C51,C54,C56. Replace with 0.01mfd/200 Volt 1206 style surface mount caps Digikey 478-1511-6

6.Replaced ceramic wire wound 10 Watt stand up resistors that were blown open. Replaced with 20 ohm design change. These slowly charge the main input filter caps and when supply is stable, a relay shorts them out. If you have replaced the fuse, you LIKELY blew them out. Original value was 10 ohms on some units. This was a Mouser part. 280-PRM10-20-RC

7. The 2153 switching reg chip IC1. This chip shorts. It is made by International Rectifier and I believe the full number is something like IRF2153. I had these in stock and not sure of which source I had procured them from... It was from one or the other.

Lots of destruction and one really needs a desoldering station to work this. Removal of the blown IGBT's is especially tough. All solder must be removed from the transistor leads AND the thermistor on one of the heat sinks. Once you have verified the leads are loose, one has to rock the heat sinks to get the tabs free. The tabs are NOT soldered! Be careful when restoring to get the thermistor leads started in their holes.

Note: ALL these repair parts were procured from DigiKey.com and Mouser.com. Neither of these places had all, I had to order from both. Mouser had the ceramic resistors.

When restarting this, leave outputs disconnected until it is running again. USE a series 75 watt light bulb in the 120 volt input. ONLY work on the unit using an isolation transformer as a large portion of this is connected right to the power line.

There is a small 15 volt switching supply that comes on first that runs the relay to short out the inrush limiting resistors. With the 2153 shorted as usual, this auxilary supply can't reach voltage enough to turn on the relay. The power for this is supplied through the ceramic resistors.

May 08, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

1 Answer

The circuit board is bad on my 2175 solar welder,on the board is a number510-045-0. Where can I purchase a new board?


I find many links when I Google "solar 2175 welder parts", but don't know about NEW boards. You could get guaranteed repair of this 510-045-000 for about 84 dollars and 23 cents total. Otherwise (reading aloud & use all lower case)
Cee q Jay Jay u Nine Dash 838 At sbcglobal.net
will get you details.
Replace the off-board transistor cabled to the 3-pin connector (regardless of whether it is an MJ900 or MJ11015) at the same time with a new one in the repair kit. That's because a bad or missing off-board transistor can easily smoke a good board, specifically the surface-mount chip 723-type regulator on the solder side of the board.

Feb 17, 2010 | Welding Tools

2 Answers

My receiver shuts off after 3 seconds.


Between the ground and the "PRD" pin of the CPU, there are three diodes: D503, D504 and D505. The first two seem to be useful to protect the CPU itself against any over-current. In case of short circuit or similar, these 2 diodes can easily blow out, and force to "0" the pin 139 voltage of the CPU ("PRD" pin, dedicated to detect any abnormal DC voltage from output transistors)
This is the reason why the protection circuit shuts-off the unit, even if the faulty power transistors have been replaced

Diodes are normal surface-mounted 1SS355: I've replaced them with two 1N4146, and everything works perfectly now.
Diodes are located in the "Function" board, at the left side of the unit: they are easily accessible

I've realized that the problems seems to be extremely common for this model, so I hope that this hint will be useful in several cases

Oct 28, 2009 | Yamaha RX-V1500 Receiver

1 Answer

Dell dimension 5150 front control panel board - usb ports


Google it. Otherwise,no dice,replace the board if you can find one. Try ebay.

Jun 23, 2009 | Dell Dimension 5150 (DIM515MIN) PC Desktop

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