Question about Panasonic DVD-S29 DVD Player

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DVD S29 When I plug the power cable into the wall and turn on the switch, the 1.6 amp fuse blows on the PCB. I have checked the cable and there is no damage or short. I would have assumed that fault is coming from the circuit between the input and the fuse but there is no sign of damage. Can you please help or is this a throw away item now?

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You are thinking backward on just what the fuse is monitoring. You have a problem in the unit itself that is causing the power supply problem...accordianman

Posted on Feb 29, 2008

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I have a nad 3130 amplifier which has been in storage for sometime. I've plugged it in and I have no power to the amp.


If the fuses are good....do this.....
1...unplug the amp from the wall AND KEEP IT UNPLUGGED !!!
2 Turn the power switch on ( again , the amp is UNPLUGGED from the wall )
3 with an ohm meter or a multimeter set on ohms., measure the ohms across the ac cord that plugs into the wall....in other words...take one meter lead and touch it to only one " blade" that plugs into the wall and keep it touching the " blade".....while you are holding it there, touch the other meter lead to the other " blade " that plugs into the wall.....you should get a very low ohm reading ( 2-50 ohms )......if it is over that number, your transformer or your switch is open ( toast ). hopefully it is the switch as transformers are un-available......good luck, be safe, and if you arent sure....ask before doing something silly.....Rob

Apr 03, 2015 | NAD Audio Players & Recorders

1 Answer

No power in Mackie TH-15A


i) I assume the fuse you mentioned was in the mains plug - did you also check the fuse in the TH15A mains input socket? This is accessed by pulling out the tab in the bottom section of the socket (below the centre pin). This is a 3.15Amp antisurge fuse, 20mm type.

ii) If this fuse has blown, then replace it & all may be well ...... but if it blows again, then move to step iii).

iii) With mains disconnected, remove rear panel (outer screws) & check the power supply PCB for damaged components, especially R111 & R112 (100ohms). If the latter are burnt or open circuited, then the amplifier module may have blown.

regards, Dave

Aug 20, 2014 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

Sony amplifier protect mode


The protect mode setup provided to protect the speakers against burning due to the amp output short circuit. protecter activated means one or more channels of the O/Pamp is short circuited(defective) in your amplifire . First of all Remove the Power cable from the Amplifier and make sure no power connected to the Amp.
1.First step identify the faulty O/P Amp Channel---------
Inside the Amp you will see Five O/P Amp Sections (all are looking similar this is the common idea to locate the O/P Amps) there will be ten power transistors fitted on heatsink (2 transitors for each channel).some cases damaged transister are visible physicaly then easily you can identify the faulty channel(maybe cracked or blowned). There is no visible signs then you must do some tests with multimeter.You will find Five relays on the pcb( mostly square or rectangular ice cube relays) each relay have coil and N/O contacts built in and the terminals soldered to the pcb first you should identify the contact terminals (mostly it will be marked at the top side of the relay) otherwise a simple idea is , look on the pcb solder side trace the printed copper track going from the terminals of the relays you will see one is going to the speaker out socket this terminal called Sp O/P, other one going to the Amp O/P Transisters legs (some cases it pass through a coil of few turns) this terminal called Hot O/P . Do the same follow up and find the both terminals for the all the 5 channels.
Next step make sure you or not touching any live power (220v or 110v A.C) tracks or wires inside the Amplifire and you should keep this in your mind althrough the following tests
Take your multimeter select the D.C Voltage Range connect the Negative probe(Black) to the Metal Body of the Amp and put the positive probe (Red) apart safely. plug back the power cable to the Amp and power it from your wall socket then switch on the Amp. Turn the volume control knob to zero and select the input selector switch to Linein or Aux and remove the RCA Cable connected to that input socket. Now carefully touch the Hot O/P terminal of the relays with the positive probe and note down the voltage readings on a paer (Do this for all 5 relays one by one, values result may be + volt or -- volt or zero volt). After see the reading values we can find the faulty Amp section
1. The channels showing zero voltage are in good condition.
2. The channels showing + volt or -- volt ( may vary from 1 volt to 30 volt ) are faulty damaged Amp sections.
Now we located the faulty Amps then how to fix the faulty ones.
before going to do the next step switch off the Amp and remove the power cable from the wall socket. Check all active components one by one (transistors,diodes,zener diodes) and resisters capacitors in the faulty Amp section replace the faulty components by the same value new ones. carefully test the components twise. if you miss a small defect component or replace it in wrong way this single mistake will blow up your Amp again. After replaced the defective components do the relays Hot O/P terminals volt reading test process again. if all the readings are zero volt you have successfully repaired your amp still the reading showing some voltage means you must do the components checkup process again. If you do it slowly with full concentration surly you will fix your problem and your Amp will work back to enjoy the music .GOOD LUCK.
for comments and doubts contact ---paul1298traj@gmail.com-----

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1 Answer

Hi, I have only used my CA 740C a few times and the fuse blows, I placed another fuse in and that blew as well. Haven't a clue why this might be happening can you help please? Thanks


Looks like a electrical problem. Ensure your plug's earth is properly connected to the building earth. Amps like 640A uses sensitive circuits and the fuse will definitely blow, when there are issues, spikes or returns in the power supply.

Try shifting the amp to a different wall plug with some proper ground earth, and check it. If the fuse still blows, then the power cable in the amp may have some problems.

Hope this helps :-)

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2 Answers

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E732 Error code details


  Main cause
 The cable connector has poor connection. The reader controller PCB is faulty.

Condition
 0001 The main controller PCB detects a fault in the communication between the reader controller PCB and the main controller PCB. Connectors
1) Connect the cable [1] for the environment heater.

ir7200-f04-309-01_e.png 2) As needed, connect the reader unit anticondensation heater cable [1].

ir7200-f04-309-02_e.png PLS RATE ME!!!!!!!THANKS MATE.

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1 Answer

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Plugged in s-video cable.
however, i think that your service is excellent.

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2 Answers

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Check fuses mounted near transformer . If blown check output transistor. Also check transistor transistors on small heat sink . they will cause fuse to blow.

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1 Answer

Dual DVD (Model#DDV9555) does not turn on.


Hi,
you could try checking the plug fuse.
or opening the casing, and seeing if theres an on board fuse located near to the mains power inlet. usually a small glass fuse. 0.5 to 1.5 Amp quick blow type.
Make sure you switch off and unplug before attempting this.
if the fuse blows again, when you switch it back on, unless it,s warranted. Bin It and buy a new One.
Mike @ Compurepair.

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2 Answers

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