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AVR 165 no output

The 15 volt rails have no output due to fuseables being open on PCB near power transformer. Replaced and check la7915 and la7815 OK.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

techman
  • 3130 Answers

SOURCE: Denon AVR-810 going into PROTECTION mode

It sounds like there is a problem with the differential circuit. The bias I am not sure about, as every unit is different. You should get the service manual to be sure or call Denon and see if they can give you an idea. Good Luck

Posted on Jun 05, 2007

djnick989
  • 1067 Answers

SOURCE: Can Denon AVR-1403 take 250 volts AC power?

no it will be damged need hi end monster power strip hd700 or better off ebay that will go 1st and alarm will sound on it

Posted on Jan 10, 2008

  • 4234 Answers

SOURCE: Have a nearly 30-year old

Look for shorted output transistors or possibly shorted rectifier diodes. An immediate fuse blowing up usually means that the power supply is the problem. Keep us posted.
Dan

Posted on Apr 08, 2008

  • 319 Answers

SOURCE: No Life, does NOT power up, Fuse is OK

There is apparently some component in the stanby circuit that is malfunctioning. There may be a milli amp fuse off the standy transformer secondary. Check - don't confuse with a resistor. It may read 2 ohms or less

Posted on May 10, 2008

trainrick
  • 22 Answers

SOURCE: Cannot Power Up, Sometimes can

i had a real nice yamaha natural sound receiver and the relay that switched it on went bad a lot..... try the relay???

Posted on Apr 26, 2010

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No output from Orbit transformer Model # WT41-2600300AU, transformer rated output is 26volts, 300ma. Only transformer I have been able to find is Orbit # 57040-10C, 24vac, 750 ma. Is this supposed to be...


The 750 ma transformer is fine. The only concern you have is that it matches voltage. The higher amperage is what it is capable of delivering. It would be like plugging a radio into a circuit with a 15 amp breaker or a 20 amp breaker. My transformers are 1250 ma, 24 volts. The 24 volt transformer will probably give you the 26 volts of your old unit. It is fine to use.

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There is nothing on the display,conditioner is death.The power is coming,fuse on the PCB is OK?


Check power to transformer (220volts---24/12volts Dc) which leads to function PCB. If 24 or 12 dc is o.k, then you have replace PCB only.If no output of DC, replace transformer. Thanks.

Jan 29, 2011 | LG LS-K1830HL Heat Cool Mini Split Air...

1 Answer

I have a sony trinitron puchased 2001 after 911 standby light flashes constantly picture flashes off and on


Hello
Complete loss of horizontal oscillation and output is the trouble. To get it repaired you have to open your TV, Just look the horizontal driver transformer, a small transformer fitted on the main board very near to the line output transformer [LOT] for winding opened. If its primary winding gets opend, even though the horizontal oscillator section works, the pulses will not reach the horizontal output trnasistor, which drive the above said LOT, and the fault you describes will occur. Check the main secondary regulated supply voltage [140VDC] also. If this voltage is missing, check the reason and follo the supply rail print from the SMPS power supply reguator section.
Check the low voltage regulator IC, usually 7808 or 7812, which can be located on the main board, which supplies 8VDC or 12VDC to the ICs on the main board. Anyway, there is no horizontal output fuction in your tV. and try to find it. If you wants furthermore assistance, feel free to get me through Fixya. OK.

Jan 01, 2011 | Sony FD Trinitron WEGA KV-34HS420 34" TV

1 Answer

Power ok but not eht function


Hello

If you have tested the secondary section of the SMPS power supply of your Sony TV, amd found it OK I thinks, and posts this solution.

If the secondary supply rail 125VDC is found ok, just goto to the Horizontal Output Transformer, a small transformer diretly soldered on tho the main board, very near to the Line Output Transformer [LOT], and its secondary winding is connected to the base of the line output transistor, which in turn drives the LOT said above, generates EHT you described.
The base of the line output transitor must get appropriate frequency to switch on and off. This frequenct is gerally comes to 15625Hz. Just measure the voltage across the primary winding of the above said line driver transformer, which can be a possiblity open winding. Check the voltage at the collector point of the line drive transitor connected ti the one end of the primary winding is easy. Then check the voltage at the other end of that winding. There must be a little difference of 2VDC or so, if the line drive section is working, and fault is after that section, that is line output section. If you have a digital multimeter capable of measuring frequency, measure the frequency of the collector point of line drive transtor, and find out whether there is 15625Hz or near to this frequency comming out. Never touch the multimeter prob to the collector of Horizontal Outout Transistor, while it is working. Your meter will get damaged.
Line output section, contains tha LOT said above and line output transitor. If the Line Output Transistor has some sort of leak, normally collector to base leak, it will not drive the LOT to produce EHT and it wlii heat up also.
Just check it heat effect, after switching the set on for a short period of time, say 30 seconds ro so. If it heats up abnormally, suspect the line output transistor and LOT. You just replace the line output transistor first, with same type and number. If it doesn't retify your problem, LOT said abve is faulty, and it also should be replaced with same type and number.
If you have to replace the horizontal output transistor, and the LOT said abve, insist on orginal, and not replace it with a susbstityution, as these are critical components in all TVs..
If you need further assistance, get me through Fixya, and be free to conact me. Ok

Nov 29, 2010 | Sony KV-XA21M61 21" TV

2 Answers

Nad amp failure


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

Mar 10, 2008 | NAD C350 2-Channel Amplifier

2 Answers

110 Volts plugged in 220


More than likely just the power supply would be damaged, it should blow before the rest of the unit gets damaged. Maybe even just the fuse inside where the power lead connects is blown.

Mar 08, 2008 | Harman Kardon AVR 135 Receiver

2 Answers

On standby


Mine does the same thing..........
If anybody knows the problem ........please e-mail me.
StageRulz@Yahoo.com

Oct 04, 2007 | Denon AVR-681 Receiver

2 Answers

No raster no audio,Zenith SJ 2065S5


as horizontal transistor gets very hot so no eht so no raster &no sound due to nosupply to vif & tuner. as hor output is getting hot please isolate supply to hor. section & check power supply output is ok as due to high voltage h/outout may get hot & demaged. if supply is ok check for leaky or short parts in hor output. 1 hor. output transistor itself if it is replaced that may not be of proper matching. 2 diode& cap.in eht section. 3 clean print near eht. 4 moisture near yoke due to rain in rainy season only. so keep it hot for few hours. 5 at last if all are ok eht or fly back transformer. re connect power to hor output after rectification

Sep 18, 2007 | Televison & Video

1 Answer

Shorts


Could it be in the HV circuit? first you isolate h/output section from power supply. make power supply output ok. check h/output section for short circuit 1 print short near eht 2 diodes or cap.near eht 3 yoke H winding just by removing connector 4 EHT transformer regards

Sep 12, 2007 | GE 25GT270 TV

2 Answers

NATIONAL NNN -C 2000P LOW VOLTAGE PRIMARY GETS FREQUENTLY OPENED


There is something on the secondary side which is drawing too much current. I would check all electrolytic capacitors, zener diodes, transistors, and voltage regulators.

Mar 27, 2007 | Panasonic NN-C994S Convection/Microwave...

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