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CM542 / COMMODORE [<14" monitors]

The EURAS repair tip database for professional technicians and service engineers supplies the following faults for CM542 / COMMODORE.

List of fault symptoms:
  • No green.
  • Horizontal size adjustment.
  • Sub-carrier oscillator adjustment.
  • Screen adjustment.
  • Chrominance adjustment.
  • R598 sub-brightness control adjustment.
  • VG2 adjustment and cut-off points in the picture tube.
  • Precise adjustment of dynamic convergence.
  • No blue.
  • Horizontal sync adjustment.
  • No red.
  • 4.43MHz blanking circuit in luminance circuit.
  • No or unstable picture. No mode switching.
  • Picture geometry adjustment. (COMMODORE - CM542 information)
  • Adjustment of VG2 and CRT-switching point.
  • No brown colour or unstable colour.
  • No vertical deflection.
  • No or unstable colour.
  • No colour (for comp and set mode).
  • No or poor audio.
  • Horizontal line only. Poor vertical scan.
  • No or poor picture.
  • Fault in the high voltage unit.
  • Vertical sync adjustment.
  • No colour.
  • Colour purity adjustment. (CM542 tip from COMMODORE)
  • Black and white tracking.
  • Comb filter adjustment.
  • No picture. Weak buzzing sound from speakers.
  • Focus adjustment.
  • Power supply adjustment.
  • No HV. Unstable picture.
  • Dead. Trips.
  • Switches off after approx. 1hr operating time. Same effect after cooling down.
  • Blank picture/raster.
  • Poor colour.
  • No display. (COMMODORE - CM542 information)
  • No or low output or high pitched whistling.
  • No picture or poor picture in RGB mode.
  • PAL delay line.
  • Unstable picture, RGB mode.
  • Supply voltage +125V. (CM542 tips)
  • Specifications.
  • PSU switches off (squeak).
  • No vertical synchronisation. No horizontal synchronisation.
  • Vertical synchronisation adjustment.
  • No raster.
  • No picture.
  • Horizontal amplitude and centering adjustment.
  • X-ray protection circuit adjustment.
  • Auxiliary oscillator adjustment.
  • R496 pin cushion adjustment (8CM643 only).
  • Tripping power supply. (CM542 COMMODORE repair tip)
  • Vertical size adjustment. (CM542 tips)
  • Vertical amplitude and centering adjustment.
  • No audio.
  • Static convergence adjustment.
  • +125V supply voltage adjustment.
  • Poor picture.
  • PAL delay line adjustment.
  • Vertical collapse.

With this service information, you may repair COMMODORE CM542 faster/better when it fails.

When COMMODORE CM542 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. COMMODORE CM542 fails can be better solved.

If COMMODORE CM542 fails, this information will help you. Here you can only see the symptom list, to access remedies, you must register.

With help of this list a solution is found often when COMMODORE CM542 fails.


Additionally to repairtips or service information CM542 is linked to 2 components (IC's and/or transformers) in the Tectra database, through which you can identify electrical compatibilities (crossreferences) in appliances.


For CM542 there are 19 compatible appliances known and can be listed.


Do you want to see this remedies/cures for repairtips?   Register here for the EURAS System
Please note: access to the EURAS System can be granted only to professional TV/household electronics repair shops/technicians/Video which are authorized for service by a manufacturer, or can prove to be professionally certified to do repairs on electronic appliances. You will be asked for a statement and information accordingly during registration.

If you do not qualify as stated above and you have an appliance that needs technical service, we do recommend you to contact the manufacturer (for example through his website) or go to a professional Video/TV/household electronics repair shop close to you.

Already registered? open CM542 COMMODORE in EURAS

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Last updated: 15. Oct 2008 21:01:06 MET, doccode ISO9002AS168EKA200805C EURASMOP

Responsible for the content: EURAS International GmbH, Eime, Germany.
All brand- or productnames are copyrighted by the respective manufacturer of the appliance and are only being used for identification purposes.