I purchased a copy of my old JVC VCR Service manual from Owner-Manuals.com
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I was able to fix my VCR - it had a bad belt.
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Good service, well organized. Cheap, and the service manual was as expected. A valuable service for those of us wanting to keep the old junk going!
Text excerpt from page 12 (click to view)
1-3. Cleaning
1-3-2. Fan
The temperature in the set increases if dust is attached to the opening block of a fan and the air flow is disturbed. This may badly influence the performance and life of the set. It is recommended to clean the fans every one month. (Fan of Front side) (1) Detach the front panel. (Refer to the section 1-2-1.) (2) Remove dust on the fan and the fan guard using a vacuum cleaner. (Fan of Upper and Lower side) (1) Pull out the fan tray from the unit. (Refer to steps 1 and 2 of �2. Replacement of Fan on the Top Side� in the section 1-5-1, or steps 1 through 4 of �3. Replacement of Fan on the Bottom Side� in the section 1-5-1. (2) Remove dust on the fan using a vacuum cleaner.