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How to Test & Rejuvenate a Sony Trinitron CRT
Poor colour and white balance persist on a rebuilt Sony PVM 20M2MDU Trinitron, so the channel tests the tube with a B&K Precision 467 analyser and then rejuvenates it.
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31 videos.
Even unplugged, a tube television or monitor can hold a dangerous high voltage in the tube and flyback. If the glass is knocked or cracked it may implode, so protect your eyes and never lift the tube by its neck. Mains voltage is inside the set as well. None of these jobs suits a beginner.
A set with no picture, a single bright line, weak colour or no power often has tired capacitors or a fault in the flyback circuit, and the tube itself gets looked at later. If the set is dead, the KV1215 no power, no high voltage diagnosis is the matching symptom. Colour problems are the subject of the Trinitron tube test and rejuvenation, which uses a tube analyser. The Commodore SX-64 has a screen and keyboard in one case, so part two of its restoration covers both, with part one linked from it.
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Poor colour and white balance persist on a rebuilt Sony PVM 20M2MDU Trinitron, so the channel tests the tube with a B&K Precision 467 analyser and then rejuvenates it.
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The channel puts a Vectrex on the bench, updating its capacitors and chasing down a short, with other repairs along the way.
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Several bad parts turn up in a 1976 Sony Trinitron KV1215 that has no power and no high voltage. The maker uses a Fnirsi 2C53T oscilloscope and traces what caused the failure.
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RGB input is added to a Sony KV-27FV310 NTSC Trinitron to lift its picture quality, and the maker lists the soldering irons used.
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The Commodore SX-64's built-in CRT and its keyboard are tackled in part two of The Retro Collective's Trash to Treasure restoration series, with part three still to come.
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Found in the same shed as the recent Apple II+, a broken USI Pi4 amber monitor is the next job, and the maker sets about getting it working.
Publication or museum
Fault finding on both an Amiga 3000 and its CRT monitor grows into a tangle of checks in part three of the series.
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Why does a Sony BVM 1311 monitor flash? The channel suspects a bad tube at first, but notes something smells fishy, and goes on to check the tube and other components.
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An Apple Monitor II with a high-pitched whine and a collapsed vertical picture is repaired in a step-by-step video from Retro Hack Shack.
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Sony Trinitron KV-G14B1 gets an RGB input modification, with the maker working from schematics and showing how to adjust the RGB and sync voltages so the set is not overdriven.
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Noel's Retro Lab fixes a monochrome Amstrad CRT monitor and sets out working practices for a kind of set the maker describes as dangerous.
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The Gateway Astro all-in-one desktop from 1999 is repaired and tested, then set up to run Windows 98, in a video that also notes its Rugrats and Blue's Clues bundles.
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Sony KV-32XBR45 Trinitron servicing starts with a look inside the set, then moves to cleaning, discharging the tube and testing, using a 240p test suite for the display.
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A CinemaTronics vector monitor comes in for repair in the first of three parts, with a high voltage probe and an oscilloscope among the kit listed.
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A Goldstar consumer tube goes into the 25 inch WG K7000 monitor of a CPS2 cabinet, and because that tube is dim the maker then tries rejuvenating it.
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A 1977 Sony Trinitron KV1541 colour set, a remote control model, goes through diagnosis and repair on the shango066 bench.
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Case, built-in monitor and microelectronics all get attention as the maker restores a 1977 Commodore PET 2001, one of the earliest home microcomputers, in part 1 of a series.
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Sony's 1976 KV-9200, a small early Trinitron, is worn out and broken, and the maker says it needed some repair before it would run again.
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A non-working IBM 5154 EGA monitor is bought to see if it can be saved from the recyclers, and the maker tests capacitors, replaces transistors and chases a grounding fault.
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An Electrohome G07 arcade monitor chassis gets a clean-up and a recap from Classic Arcade Repairs, who link the oscilloscope and desoldering tool they use.
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Can a tired, dim picture tube be brought back? Adrian tries rejuvenation on the CRT from a Macintosh Classic II, in part 4.5 of the Macintosh Repairathon series.
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Colour fringing on a Sony PVM 1353MD is dealt with by positioning the deflection yoke and turning the adjustment rings on the tube neck.
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What is wrong with a totally dead Vectrex bought as junk on eBay? The maker diagnoses the fault, after warning that the CRT can hold a deadly charge even when switched off.
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How is screen tilt corrected on a CRT TV or monitor? The maker explains the deflection yoke in detail, then goes over adjustments and demonstrates some repairs and corrections.
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The 8-Bit Guy modifies a consumer CRT television so that it takes an RGB input, working inside the set itself.
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Part two of an RGB input mod for a consumer CRT television continues the work on the set, with a forum thread linked under the video for the mod itself.
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Restoring an Apple IIc monitor reaches its second part. The case is retrobrited, then the monochrome monitor gets a full tune up and alignment.
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Mac84 restores an original 1998 Bondi Blue iMac G3 to factory condition for its twentieth birthday, with a look back at the machine, a few games and a speed test.
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The 8-Bit Guy restores an IBM PCjr to its original condition and also repairs a monitor that was damaged while being shipped, with a guest channel linked.
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A Commodore PET from the late 1970s gets its keyboard repaired, its screen brightened and its case cleaned by The 8-Bit Guy, who goes through each job in turn.
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A free 19 inch Dell M992 CRT monitor, built by Samsung in 2002, arrives filthy and beaten up, and Adrian's Digital Basement sets about tuning it up.