Question about Lowrance Iway 500c GPS Receiver

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Fuse Blows The GPS unit has an internal short circuit that blows the fuse whenever the power cord is attached to the unit.. The cords are ok as the LED lights up and stays lit when a fresh fuse is installed and the cord hooked to the power source but not to GPS unit. The fuse blows and the LED goes off as soon as the cord is plugged into the unit.

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Posted on Dec 15, 2008

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Does the unit works at all?

Posted on Dec 12, 2007

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2 Answers

Amp keeps blowing fuses


Blowing fuses, was caused by many thing.
Short of rectifier,resistor,elco,tube heater,tube pin, and also trafo itself (primary or secondary winding). It must check step by step.
CAUTION :
THIS IS HIGH VOLTAGE AREA.
RISK OF ELECTRIC SHOCK THAT CAN KILL.
DON'T DO THIS IF YOU ARE NOT TECHNICIAN OR NOT FAMILIAR WITH VACUM TUBE CIRCUIT. THE CIRCUIT MAY STILL CONTAINS ELECTRIC SHOCK EVEN IF IF THE AMP IS NOT POWER PLUGGED.


The simple steps (see picture) are:
  1. Disconnect all connection from secondary of power trafo (PLV,PDCH,PACH and PHV).
    Power ON the amp. If fuse is not blowing,trafo is good.
  2. Power OFF the amp. Unplug the cord.
    Connect PLV1-PLV2-PLV3 (this are Bias voltage,+/-15VDC and Backlight PCB voltage) to power trafo.Power ON the amp. If fuse is not blowing,PLV circuit is good.If fuse blowing,there are parts is damage (dioda,elco,7815/7915,resistor) in this PLV circuit.
  3. If step 2 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV circuit stay connected,connect PDCH 1-2 and PACH 1-2 to power trafo. Power ON the amp.
    If fuse is not blowing,PDCH and PACH circuit is good and all tubes heater/filaments are lights after a few seconds.
    If fuse blowing,there are parts is damage (dioda,elco,tube heater pins) in this PDCH/PACH circuit.
  4. If step 3 is good,go to next step.
    Power OFF the amp. Unplug the cord.
    With PLV,PDCH,PACH circuit stay connected,connect PHV 1-2 to power trafo.
    Power ON the amp. CAUTION: HIGH VOLTAGE AREA is ON.
    If fuse is not blowing,PHV circuit is good.
    If fuse blowing,there are parts is damage (dioda,elco,tube pins) in this PHV circuit.
.amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-0.jpg
Notes:
  • Steps had to be done sequentially from 1 to 4, not upside down.
  • If tube/heater pin is short,it can't be repair. The tube must be replacing.
  • PDCH circuit is voltage for V1-2-3-4 heater/filaments.
  • PACH circuit is voltage for V5-6-7 heater/filaments.
  • Always replace fuse with same type.

amp-keeps-blowing-fuses-01sk4vtrndbaaguwe2brflsj-5-1.jpg

Oct 02, 2015 | Peavey 6505 Plus 120W Guitar Amp Head

1 Answer

Power supply fuse blows


either shorted cord or bad power supply if only when unit in water shorted cord or bad motor

Jun 24, 2013 | Aquabot Pool & Spa

2 Answers

2year old ge dryer trips breaker when it's turned on, but sometimes will run a complete cycle before it shuts off.


HELLO THERE
Electric dryers require the use of a 220 volt line. The dryer heating elements run off of 220 volts. An excessive draw of electricity, or a short in the wiring can blow a fuse or trip a breaker. This happens to protect sensitive components from damage, and to help prevent fires. Every other dryer component operates off of 110 volts, the timer, motor, etc. Usually when a fuse blows or a circuit trips, it's because there's to much draw on the power line.
It is very possible for one part of your dryer to work fine, and yet another to have a problem, such as a short circuit. A short circuit may be caused by the heating element, internal wiring, or the main power cord.
To troubleshoot this problem, unplug the dryer and check to see if the circuit breaker or fuse remains on when the dryer is unplugged. If they stay on, it's more than likely the problem is somewhere in the dryer.
If your fuse blows, or the circuit breaker trips when the dryer is unplugged, it's likely the problem is with the circuit breaker, fuse box, or house wiring; contact a professional electrician.

OK I hope this is very helpful for you
Best regards Michael

Dec 01, 2009 | GE DBSR453EBWW Electric Dryer

1 Answer

My dryer all the sudden is blowing the fuse at the panel. It runs for a short time and then blows the fuse. Sometimes it just keeps running and doesent blow the fuse. It is hooked up properly and has never...


UNPLUG THE CORD then,.,,,maybe the cord hooked to the dryer terminal block and just follow the cord to the unit and take off the axcess panel to power cord hookup is shorting out and needs to be replaced being hooked up properly is why its the first place to look for its

Aug 26, 2009 | AEG Dryers

1 Answer

Dryer is overheating and blowing circuit


Electric dryers use 220 volts or two power lines of 110 volts each. Some components in the dryer need only 110 volts; the heating element requires 220 volts. So it's possible for one part of the dryer to be fine and another part to have a short circuit. Short circuits can be caused by the heating element, the main power cord, or any other part of the internal wiring. To decide where the problem lies, unplug the dryer, then:

  • If the circuit breakers or fuses remain on and/or intact when the dryer is unplugged, it's likely the problem is with the dryer. Contact a qualified appliance repair technician.

  • If the circuit breaker trips or the fuse blows when the dryer is unplugged, it's likely the problem is with the house wiring, fuse box, or circuit box. Contact a qualified electrician.

Aug 04, 2009 | Whirlpool WED5300S Electric Dryer

1 Answer

Blowing breaker


hi. I can help you.

Electric dryers use 220 volts or two power lines of 110 volts each. Some components in the dryer need only 110 volts; the heating element requires 220 volts. So it's possible for one part of the dryer to be fine and another part to have a short circuit. Short circuits can be caused by the heating element, the main power cord, or any other part of the internal wiring. To decide where the problem lies, unplug the dryer, then:


  • If the circuit breakers or fuses remain on and/or intact when the dryer is unplugged, it's likely the problem is with the dryer. Contact a qualified appliance repair technician.

  • If the circuit breaker trips or the fuse blows when the dryer is unplugged, it's likely the problem is with the house wiring, fuse box, or circuit box. Contact a qualified electrician.

Jun 22, 2009 | Kenmore 63942 Dryer

2 Answers

Installation / wiring


Yes, you can do what you said above. The only issue I see is that you should still add an inline fuse between the GPS and the power source you will be connecting it to.** SEE NOTE BELOW **
The cigarette lighter plug has a fuse in it. Most of the fuses you have in the car start at 5 Amps and go up in value, like 10A, 20A, etc.

The problem is these values are way too high should the GPS have a catastrophic failure or the GPS power leads get pinched or shorted to ground. You'll burn up the GPS and its wiring before the auto fuse blows.

You need a low rated fuse (probably 1/4A) inline with the GPS. This will give you adequate protection. You can buy inline fuse cords at Radio Shack.

** NOTE **
Check to make sure that the DC output of the cigarette adapter is indeed +12VDC and not some lower voltage indicating that there is an internal regulator circuit. I took a look at the 660 owners manual and it says the GPS input voltage is +12VDC, so you should be ok. I also hear there is some electronics inside of the cigarette lighter plug. It may have to do with charging the internal GPS battery. You could always take apart the cigarette plug and remove the internal board and use it in your hard wiring to your vehicle.

Once you get it all working, you could duplicate what you built for another vehicle. You can buy the cigarette adapters online.

Please let me know if I can be of further assistance to you.

Good luck!
- Jim

Feb 13, 2008 | Garmin Nuvi 660 GPS Receiver

2 Answers

Fuse Blowing


A blown fuse is usually caused by a shorted regulator or a bridge rectifier circuit. Either way it is a problem in the primary power supply. A bad cord won't blow the fuse in the set, it will blow a circuit breaker in the house. A servicer usually would normally cover the inside of the set with a "few light slits in the AC cord". Hope this helps

Jun 02, 2007 | Sylvania 6626LCT 26 in. LCD Television

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