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N2850W / NAIKO [TV 16:9]

The EURAS repair tip database for professional technicians and service engineers supplies the following faults for N2850W / NAIKO.

List of fault symptoms:
  • RV38 value.
  • Reduced vertical size.
  • Stuck in standby. when cold.
  • Line output transistor fails repeatedly.
  • Flickering picture. intermittently.
  • No function, red LED is on, sometimes only faint noise from PSU.
  • Flickering picture. Audio OK .
  • Horizontal collapse.
  • Squealing from PSU.
  • Bright raster. Retrace lines.
  • Flashing picture. after a few minutes.
  • No tuning.
  • Excessive horizontal size. after a few hours.
  • No picture. via SCART.
  • No start-up after switched off from RC. Noise from PSU in standby.
  • Excessive brightness. Flyback lines. Audio OK .
  • Image white and with flyback lines and then horizontal pulsating.
  • No start-up. Green LED flashes .
  • White line in the bottom half of the picture.
  • Shuts down. after start-up.
  • No picture. Bright raster. Flyback lines. (N2850W tip from NAIKO)
  • Disable child lock.
  • Picture is only red or green or blue with flyback lines.
  • All channels up to CH51 are tuned, otherwise no function.
  • Horizontal linearity fault. (N2850W NAIKO repair tip)
  • Blue display.
  • At switch on LEDs flash. Set dead when current is switched on. Stays in standby mode.
  • No start-up from standby.
  • Sawtooth pattern when cold. Best visible in 4:3 mode. OK after a few minutes.
  • No line drive.
  • E/W fault. intermittently.
  • Beep after start-up.
  • Bright picture.
  • Protective circuit starts up, if appliance is switched on again when warm. Red LED blinks.
  • No synchronisation. OSD and TXT OK .
  • Switches off by itself.
  • Dead. LED is red .
  • PSU chirps every second after switch on, LED blinks. No other function.
  • Picture fails intermittently, line tearing in part and sound disturbs.
  • Power supply hiccups, LED flashing.
  • No start-up (intermittently).
  • Reduced vertical deflection.
  • Dead. Standby LED flashes .
  • E/W fault.
  • Smearing in picture.
  • Switches to standby. after a while.
  • Black band on picture with tearing effect. Intermittently picture flutters on bright scenes. Arcing noise. (N2850W tip from NAIKO)
  • Stuck in standby. Green LED fades out when switched on.
  • Switches to protection mode. LED flashes repeatedly twice.
  • Starts up three times then switches off. (N2850W tips)
  • Blows fuse.
  • Reduced horizontal size. Foldover in centre of picture.
  • No picture. No audio.
  • No picture. after a while.
  • Line tearing. (N2850W tip from NAIKO)
  • Dead.
  • No audio. via SCART.
  • No power up. PSU whistles every second.
  • No function, only standby LED is red.
  • Mains switch does not lock.
  • No channel storing. only on certain channels.
  • Bright white picture.
  • Picture shifted horizontally. Horizontal foldover. (N2850W tip from NAIKO)
  • Continuously blinking red LED.
  • Horizontal line. in the centre.
  • Switches off by itself. after start-up.
  • No switch on. Ticking from loudspeaker.
  • Resistors RD06 and RD17 burnt. (N2850W tips)
  • Bright white raster with flyback lines after start up, then goes to standby.
  • Dark picture. Audio OK .
  • Switches off by itself. intermittently. (N2850W NAIKO repair tip)
  • Starts up twice then dead. (NAIKO - N2850W information)
  • White screen. Flyback lines.
  • Brightness and contrast vary about 10mins, then picture flashing then goes out. Remains green raster and intermittently retrace lines.
  • No horizontal or SDA/SCL pulses after 10 seconds.
  • Blows fuse. at start-up.
  • No colour.
  • No picture. after a few minutes. Audio OK . (N2850W tips)
  • No picture , only lines, via AV socket.
  • Vertical collapse.
  • No picture. Audio OK .
  • Ragged picture.
  • Fuse FP01 has blown
  • Switches to standby (after start-up). (N2850W NAIKO repair tip)
  • Blank raster.
  • First no colours/interference, then no function.
  • Low voltages.
  • Attempts to start up twice and switches off.
  • Lines across screen then set displays a bright white raster and turned itself OFF. When switching ON again it just trips.
  • No picture. intermittently. Audio OK .
  • Flyback lines.
  • No E/W correction. Cannot be adjusted in the service menu.
  • No colour and ragged verticals.
  • Noise and whistle from the SOPS trafo.
  • Interference in picture.
  • No raster.
  • Protection mode activated. LED blinks .
  • Enter service mode.
  • Reduced horizontal size. No E/W correction.
  • PSU pulsates. LED flickers .
  • Squealing about once a second.
  • After 10mins. picture flashes and cuts out. (NAIKO - N2850W information)
  • Power supply hiccups.
  • Reduced vertical and horizontal size.
  • Changing sound to UK standard (6MHz). (service info for NAIKO -N2850W)
  • Stuck in standby.
  • Shuts down.
  • Trips.
  • No function. PSU ticks.
  • Switches to protection mode (after start-up).
  • Motorboating noise in audio.
  • Frame has shifted downwards approx 1".
  • Cannot be switched on from standby. Switches by itself to standby or sound mutes.
  • Excessive horizontal size. No E/W correction.
  • No E/W correction.
  • FBT flashover.
  • Torn picture. Vertical foldover. depending on picture content.
  • No functions.
  • Horizontal line.
  • Picture increases gradually. Linearity error and stripes in upper picture area.
  • Smoking.
  • No function. Standby LED does not light up. Power supply squeaks once a second.
  • Switches on. Raster appears and switches to standby after 2-3 secs.
  • Doesn't read DVD's.
  • No start-up.
  • No start-up. LED is red .
  • Trips (after start-up).
  • Installation menu.
  • Line output transistor S/C.
  • Shuts down. after start-up. No vertical deflection.
  • No horizontal deflection.
  • Enable child lock.
  • Comes on for a short time. Burning smell. (service info for NAIKO -N2850W)
  • Dead with a slight squealing sound, which gets louder.
  • Focus cannot be set well. It takes a long time before picture appears. (N2850W NAIKO repair tip)
  • Cycles on/off.
  • Switches to standby. intermittently.
  • Poor synchronisation.
  • Peeping sound.
  • Blank raster. Retrace lines. Audio OK .
  • Shuts down. intermittently. PSU pulsates.
  • Switches to protection mode.
  • Noise in picture.
  • Fails after start-up.
  • No functions. after lightning strike.
  • Dead. Standby LED does not light.
  • Tries to start 2 times then switches to standby.
  • Reduced horizontal size. E/W distortion.
  • No operation.
  • Tripping.
  • Drops out.

When NAIKO N2850W fails , these symptoms are known and EURAS knows the remedy/solution.

Tips are coming from EURAS customers, workshops and payed technicians from all over the world. NAIKO N2850W fails can be better solved.

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Additionally to repairtips or service information N2850W is linked to 78 components (IC's and/or transformers) in the Tectra database, through which you can identify electrical compatibilities (crossreferences) in appliances.


Chassis information is available (which chassis is built in into N2850W ).

EURAS system also knows 337 appliances having the same chassis as N2850W and can easily list them.

In the repair discussion pinboard for N2850W there are 155 replies to questions asked about 133 different repair problems.
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Last updated: 10. Aug 2008 21:29:55 MET, doccode ISO9002AS168EKA200805C [cachelite] EURASMOP

Responsible for the content: EURAS International GmbH, Eime, Germany. All rights reserved, EURAS database V2.0 (C) 2002-2008. All brand- or productnames are copyrighted by the respective manufacturer of the appliance and are only being used for identification purposes.