Unit was working fine earlier in the day. I turned it on, set the speaker control to "B" (outside), and music started. Within a couple of seconds, the display started blinking 'protect' and then sound quit and display went blank. Other lights (surround, bass boost, etc) still function. Have tried unplugging unit, hoping it might re-set itself, but still no display. Cannot locate any type of circuit breaker/overload protection.
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Re: 'protect' blinked and then no sound or display
Disconnect the outside speakers "at the speakers" then turn back on. If the problem persists, disconnect the speakers at the back of the receiver and try again. If the problem stops "at the receiver" check your terminals and make sure no braids are touching each other. If the problem stops when you disconnect at the speaker, chances are good it's a bad voice coil from moisture. Most "outdoor" speakers with a brand name on them have a pretty good warranty. Good speakers have a 10 year warranty and the manufacturer will replace. If you still have an issue, post a comment and I can help you some more
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Have you gone through this checking sequence.? it's from a Panasonic a/c manual. It could be something as simple as a clogged filter. Once you have rectified the fault, you will probably have to clear the fault code as described at bottom below, before it will condescend to work again.
Once error occurred during operation, the unit will stop its operation, and Timer LED blinks.
Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will ON again.
In operation after breakdown repair, the Timer LED will not blink. The last error code (abnormality) will be stored
in IC memory.
14.2.2 To Make a Diagnosis
1 Timer LED starts to blink and the unit automatically stops the operation.
2 Press the CHECK button on the remote control continuously for 5 seconds.
3 "- -" will be displayed on the remote control display.
Note: Display only for "- -" (No signal transmission, no receiving sound and no Power LED blinking)
4 Press the TIMER ? or ? button on the remote control. The code "H00" (no abnormality) will be displayed and signal will be transmit to the main unit.
5 Each press of the button (? or ?) will increase error code number and transmit error code signal to the main unit.
6 When the latest abnormality code on the main unit and code
transmitted from the remote control are matched, Power LED will
light up for 30 seconds and a "beep" sound (continuously for 4
seconds) will be heard. If no codes are matched, Power LED will light up for 0.5 seconds and no sound will be heard.
7 The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5 seconds or operating the unit for 30 seconds.
8 The LED will be off if the unit is turned off or the RESET button on the main unit is pressed.
14.2.3 To Display Memorized Error Code (Protective Operation)
1 Turn power on.
2 Press the CHECK button on the remote control
3 "- -" will be displayed on the remote control display. Note: Display only for "- -" (No signal transmission, no receiving sound and no Power LED blinking)
4 Press the TIMER ? or ? button on the remote control. The code "H00" (no abnormality) will be displayed
and signal will be transmit to the main unit.
5 Each press of the button (? or ?) will increase error code number and transmit error code signal to the main
6 When the latest abnormality code on the main unit and code transmitted from the remote control are matched,
Power LED will light up for 30 seconds and a "beep" sound (continuously for 4 seconds) will be heard. If no
codes are matched, Power LED will light up for 0.5 seconds and no sound will be heard.
7 The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5
seconds or operating the unit for 30 seconds.
8 The same diagnosis can be repeated by turning power on again.
14.2.4 To Clear Memorized Error Code after Repair (Protective Operation)
1 Turn power on (in standby condition).
2 Press the AUTO button for 5 seconds (a "beep" sound is heard) on the main unit to operate the unit at Forced Cooling Operation Mode.
3 Press the CHECK button on the remote control for about 1 second with a pointed object to transmit signal to
main unit. A "beep" sound is heard, and the Error Code is cleared
Hello Check the connection to speaker with this amp, for any short or any other fault. disconnect the outputs, ie, speakers from the amp, and switch it On, and see the protect display comes or not. If it comes, the fault is internal and the set need service. Your M3 dual Mono integrated amp, is of high output power and its outputs are protected against any overload or short circuit. If the system detect any among this condition specified above, it will show protect mode display. Never load this amp, as protection display is there, as it may damage the speaker or its internal power amplifier section circuits, may cause more money to get it repaired. OK.
This solution from troylove solved my problem.troylove11 Rank: Wiz Rating: 85%, 1164 votes
This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input/device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source.
It is going into the protect mode. Unplug all speakers and try again. If it turns on you have a bad speaker.
Plug in one speaker at a time turing the unit off in between each speaker and when it goes into protect again you know the last speaker plugged in is the bad one.
If the receiver still goes into protect with no speakers connected, you have an internal amplifier problem. This is something that should be checked by a service center. This particular model is not an easy one to disassemble and troubleshoot.
The sound you hear that sounds like a circuit breaker is actually a relay. It makes a clicking sound when turned on or off. That relay is functioning properly. It supplies the A/C voltage to the main power transformer.
Sometimes when the display is not lighting up at all and the unit is displaying all the symtoms your has, the power transformer is at fault. If you have a voltage meter or a ohm meter (multimeters have both) I can guide you thru the process of determaining if the transformer is good or not. That is an easy enough process for most people.
Let me know if you need more help, and a rating of "FixYa" would be appreciated if you found this information helpful.
Take every single cable out of the unit, now power on the unit.
If the power protection still shows then there is an internal fault, usually a short or a component defect.
If it powers on ok, switch off and insert 1 speaker at a time and power on the unit until the protection mode comes on again, the last speaker you have put in has overloaded it for some reason, also as you are trying each speaker use the volume and bass controls to see if there is an internal overload.
Thats as much as I can offer you until you narrow the fault down to the unit or one of the speakers.