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VCR Cleaning : How to clean a VCR

 Go to Part 1 of VCR Basics

 VCR Basics Part 2



VCR front: Display Panel, Controls, Cassette Door




VCR HEAD cleaning: VCR cleaning

If you use your VCR constantly, then you will need to do some maintenance eventually. The video tape is moving over the drum and guide rollers inside the VCR, the eject mechanism has moving parts and dust gets in air vents and on small components which need to shed heat. Additionally, if you use rented tapes or old tapes, you can get a build-up of particles from the tapes themselves which tend to show up on your TV screen as snow, since the video heads get clogged. 

You have three choices: 

1) Do nothing and hope your VCR performs flawlessly for as long as you own it.
2) Take your VCR in to an electronics repair shop and pay them to clean it.
3) Clean the VCR yourself.

The first choice is a bet against the odds. You may get lucky and never have a problem but the more you use the VCR the less your chances are of flawless performance. The second choice is good if you do not have technical ability. You just need money. The third choice is good if you have some technical skill and do not mind doing the job yourself. You could also save some cash.

If you are careful, use common sense and follow the cleaning process step by step, you could end up with a clean machine, and the best video picture possible from your VCR.

What parts in my VCR should I clean?

  • The capstan shaft: This is the motorized shaft that pulls the video tape through the tape path.
  • Pinch roller: This is the wheel that presses against the capstan shaft, so the capstan shaft can pull the video tape through the tape path.
  • A/C head: A mechanical part that contains the record and playback audio head, the audio erase head, and the FM head.
  • Tension rollers: These rollers attenuate vibration or flutter from the video tape as it is moving across the record/playback head.
  • Erase head: As the name implies, this head erases all recorded information off the video tape before it reaches the recording head.
  • Roller guides: These guides pull the video tape onto the tape path and align the video tape to the video drum (the part that holds the video heads).
  • Video heads: The most important, expensive, and dirt-sensitive piece, the video heads (video drum) pick up the image part of the signal off the video tape, or record the video image onto the tape.


The chrome cylindrical drum is where you will find the video heads, spaced equally apart from each other around the drum. Two video heads will give you good results if you're always recording in SP mode. If you like getting more than 2 or 2.5 hours or so on a tape, or if you like your scanning speed to be as fast as possible, you probably record in SLP. So you'll want a four head deck, which has a pair of heads for each speed. You may never notice the difference if you're just watching tapes, but if you use freeze frame etc., the extra two heads will give you better results on the slow speed. Currently most decks have 4 heads. The video heads are mounted on that silver, spinning drum inside the vcr.



VCR Video Drum with Video heads

Close-up of a Video Head



The video heads are just inside the dark groove running around the drum. They are very small but you can feel them when turning the top portion of the drum by hand while cleaning.
 
Cleaning cassettes are only effective on the video heads and upper drum assembly. They can work sometimes, but tend to just smear the grime around instead of removing it. The rest of the VCR assembly has to be cleaned by hand. 

CAUTION: You do not have to be a risk taker, but remember, you could be asking for trouble by cleaning your VCR yourself. That is not to say it can't be done. Many consumers can do the job themselves, however if you have no knowledge or experience with electronic devices, you are better off not attempting to clean your VCR yourself. Leave it to the professionals.

Step by step process to clean your VCR: (Do this process at your own risk)

1) Turn the VCR OFF and unplug it from the AC power outlet. You do not want to get an electrical shock from the internal parts. It is a good idea not to touch any parts inside the VCR with your fingers. First because you want to avoid electrical shock from capacitors which may store a charge and second because you do not want to leave oil from your skin on parts inside your VCR.

2) Remove the small screws (usually four) with a screwdriver and take off the top housing of the VCR. The main thing to be cleaned inside the VCR are the video heads which are located on a spinning (when operating) chrome drum.


Enlarge image

VCR after removing cover. The Video drum is the round cylinder (back left).

The video drum is the large tilted assembly the tape wraps around and is divided into two halves. The small fragile video heads are visible in the groove between the two chrome halves of the drum when you rotate the upper part by hand. Use extreme caution. Never use cotton swabs to clean them. Cotton tends to grab, get caught or leave fibers in the heads. It can also break them. Using chamois sticks and head cleaning fluid is by far the safest method although you could use clean, high quality typing paper lightly soaked in isopropyl alcohol on older VCRs. An electronics shop usually has the materials you need or you may have them around the house.


Enlarge image

3) You want to press lightly, but enough to get the dirt off the heads. Rotate the drum by hand while pressing against the groove where the heads are and try to get the dirt off the video heads with several turns. Examine the residue, if any, to see if less and less is coming off until you get a clean swipe. You may not see any residue but you are still getting microscopic particles off the heads with the solvent.


Enlarge image

Using a piece of clean typing paper soaked in 70% isopropyl alcohol by lightly pressing against video drum while turning the top portion with your other hand. You can just feel the video heads on your finger as they pass by while turning. The alcohol will assist in wiping the dirt off the video heads. Do this several times even if you see no residue on the paper. If you do see dirt, then repeat using a clean part of the paper each time until you see nothing else coming off on the paper.

If done properly you'll be amazed at how good your picture will look when you play a tape (assuming all else is working as it should). If not, you should repeat the cleaning process. The video heads are so small the unseen microscopic dirt particles can still be present. Repeating the cleaning several times may remove the particles.


4) You can use Q-tips cotton swabs with a little alcohol to clean almost everything else in the VCR. Take the dust off circuit board components such as capacitors with a dry Q-tip. Swipe the dust off everywhere it has accumulated but do not remove the lubricant on gears and glide paths. The moving parts need this lubricant to operate smoothly. You can use alcohol on audio heads, erase heads, chrome parts and metal framework but do not use solvents on any rubber parts as it tends to harden them and make them brittle. Try not to touch any parts which could be put out of alignment. When in doubt, don't move it.

If after cleaning you still have a video problem, most likely your video head(s) are damaged, although you could try to clean them again. 

The capstan shaft always seems to collect most of the debris. Most of the buildup is an oxide material that comes from the tapes. You want to be sure when cleaning it, that you use minimal cleaning fluid on the swab to help keep it from going down into the capstan bearing. Most of the time this shaft cleans right up, but sometimes buildups can be stubborn. Don't be tempted to scrape the oxide off with something hard like a knife. If the buildup won't come off after persistent scrubbing, try soaking the capstan shaft with any lubricating oil and set it aside for a few hours - preferably overnight. The oil will penetrate and loosen the oxide material making it much easier to remove. Don't forget to clean the oil off when finished.

You might be tempted to use a vacuum cleaner or an air compressor to remove dust and grime but this is not recommended. The VCR components are too delicate to stick these large tools inside the deck and you do not want to blow dust into the lubricants on the assembly. 

5) Next we clean everything else in the tape path. The only thing we need to be careful about is getting any fluid on belts or rubber. Head cleaning fluid is still a good choice. Starting with the supply reel table, clean off any dust. Give special attention to where the idler and brakes make contact with it as well as the brakes themselves. Then, in the same direction the tape flows, clean the guide post, tension arm, full erase head, impedance roller (if any), guide rollers and angle pins, audio heads, guide post, capstan shaft, half load arms or review post (if any) and finally the take-up reel table and brakes.

6) Clean the pulleys if possible. Dirt buildup in the pulleys reduces the belt tension. If belts are worn, buy a belt kit for your model VCR. They are very inexpensive. Clean door tray and front panel with some 409 type cleaner.

7) Replace top cover and align screw holes. Replace screws and tighten firmly but not over tight. Clean exterior of VCR with 409 cleaner. 

8) Plug VCR back into Ac outlet, then power ON. Test video on TV by playing a tape.






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