A few drops of water and the amp shuts down?

Previously it had turned off while watching a program, however now it cuts off as soon as I turn it on. This must be over-current protection.How to check: (0)download TX-NR636 service manual which doesn't teach you how to fix over-current protection.See P.11(1)Press display and at the same time Press ON/STANDBY TWICE(2)press home(3) I (over-current)-- 25(temperature in my amp)--42(volume level in my amp)--OA(listening mode in my amp)shown.()shown may be different in your amp. For me: -___25___42___OA. In normal condition, NO WORD in left giving you this "-"__25 instead of alphabet.How to fix over-current protect.Symptoms:time taken to shut down.3 seconds (DC protect) OR immediately shut down (Over Current protect) If over-current protect do thefollowing steps(O)unplug the amp.(1)download NR636service manual.(2)open the amp metal cover.(3)measure 7 large white resistors resistance loacated next to power transistors mounted on a large heat sink with black probe touching the middle pin and red probe to first/left or third/right pin.(4)If this 3 Pins large white colour 0.22ohm x 2 resistor is open with infinity ohms ,(5)replace it and jot down this channel for example left surround faulty. Usually only 1 channel went faulty.(5a)When the white resistor didn't burn, "2 channels" were damaged due to bad soldering joint of the large white resistor, however. (5b)When this happened, time taken of shut-down due to over-current is 3 seconds NOT immediately.(6)the two large power transistors next to this white resistor 0.22 ohms x2 should also be replaced.(7)plug the amp(8)switch it on(9)if ok, troubleshooting get done(10)if not ok(11)replace ALL the components of this power amp channel except these in 11a.(11a)P.30 use left channel as an example. R6140,R6150,C6050,R6160,Q6070,R6430,L6000,R6170,R6180,D6000.(12)pre-amp section no need to check.remember if not OK, the replaced 0.22ohm x 2 resistor and 2 power transistors maybe shorted again. Check them first. If OK, replace ALL Components in this channel except 0.22 ohm x 2 and 2 transistors. 0.22 ohm x 2 means left and middle pin 0.22 ohm as well as right and middle pin also 0.22 ohm that are 2 pieces of resistors with 0.22 ohm in a large white 3 pins resistor.Remember sometimes the0.22 ohm white resistor is normal. If so, use a digital multimeter to measure the be bias transistor voltage via multimeter diode test function. You can compare the normal value,580mV to 650mV with faulty one,3.2mV. And the CE resistance is 1.8ohms only instead of 3 Mega ohms.

Yes, you can do this easily.
Perform the following steps
(1)Plug your amp to AC outlet.
(2)Switch it on.
(3)observe time taken for switching off.
(4)immediate to shut down over current protect(5)3 seconds to shut down DC protect.
If over-current protect do the
following steps
(O)unplug the amp.
(1)download NR806 service manual.
(2)open the amp metal cover.
(3)measure 7 large white resistors resistance loacated next to power transistors mounted on a large heat sink with black probe touching the middle pin and red probe to first/left or third/right pin.
(4)If this 3 Pins large white colour 0.22ohm x 2 resistor is open with infinity ohms ,
(5)replace it and jot down this channel for example left surround faulty. Usually only 1 channel went faulty.
(6)the two large power transistors next to this white resistor 0.22 ohms x2 should also be replaced.
(7)plug the amp
(8)switch it on
(9)if ok, troubleshooting get done
(10)if not ok
(11)replace ALL the components of this power amp channel.
(12)pre-amp section no need to check.

This is a 2 channel stereo unit. Ebay shows @ a dozen of them for sale between $46- $90. In davenport Iowa, which isn't an expensive area, you can't touch a repair for that. Check your area Our estimate fee alone is $43

Turn down the volume or power settings on it since its pulling too much power and shutting off for a few sconds to keep from blowing. Depending on the amp and speakers your using dont bridge the channels. If it won't come out of protect mode then unhook everything and just hook power, ground, and remote and wee what happens. If it comes on again and stays on then amp is blown.

open and blow clean the insides and try. had worked for me.

U MUST KNOW WHAT THE THE OHM IMPEDANCE IS ON ALL 5 SPEAKERS. U MIGHT BE DROPPING THE AMP DOWN TO AN UNSTABLE OHM LOAD AND IT IS GOIN IN TO PROTECTION MODE

The red light indicates that your amplifier is in protect mode. Amps go into this mode if there is something wrong with the setup of the system to prevent fatal damage to the amplifier circuitry. This is bad thing since the amplifier will not function until the problem is solve and it can remove itself from protection mode.

Amplifiers can go into protect mode for many reasons but one of the most common is incorrect mounting. Is your amp sitting on the metal of your vehicle? Is it bolted down and screwed into the metal of the vehicle or your seat? The amp should never be touching any sort of metal. Only the ground should touching the metal of your vehicle.

Speaking of grounds, many people often neglect proper grounding which can cause an amp to go into protect mode. Do you have a solid ground? Is the wire less than 3 feet long and directly connected to a non-painted metal part of your vehicle? Is the ground wire the same gauge as your power wire?

These are just a few reasons why an amp can go into protect mode. You can find more information here. Or simply google for why your amp is in protect mode.

Hi, what you need to do is unplug all the connections to the amp. The amp goes into protection when the circuitry over heats.\
First decrease all your gains to minimal volume.
Connect your 12+V, remote, and ground.
See if the protection light comes on then.
Next plug in your RCA cables.
Check protection light.
Then plug in your subwoofer cables.
See if you are still in protect mode.
Hopefully everything works alright again.
Just slowly increase the gain to see what the cut-off is. Make sure you aren't dropping the ohmage too low on the amplifier. Check manual for correct wiring and such.

With your multimeter set to DC volts and the black meter lead on the ground terminal of the amp, touch the red lead alternately to the B+ and remote terminals as the amp shuts down. If the voltage drops below ~11 volts, you need to check the wiring feeding whichever line is dropping too low.


If the voltage remains near or above 12v, disconnect all speaker wires and signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.

It's going into a protect mode. The amp is probably shorted out. Disconnect the spkrs and turn it on. If it still shuts off, it's the amp, if not, it's the spkrs.