Question about Hitachi VTFX631A VCR
I have an old VCR its a Hitachi F361 Digital Audio Tracking with Hi-Fi stereo. Its hooked up to a electrohome tv thats 20 years or more old. I use the VCR (and its remote) to watch tv. The volume on the tv has a highpitched buzz that changes depending on the volume level. But lately when I turn the vcr on towatch tv over top of the high pitched buzz is a scratchy "buzz thats very loud and changes randomly (and is not affected by the tv's volume setting). I only hear this newer scratchy buzz when the vcr is on. I tried checking the cord connections, wiggling the connections, and propping up the vcr at a different angle hoping that would solve the problem. There also seems to be a correlation bettween the tracking lines on the vcr screen and the scratchy noise, when the lines increase so does the noise. Any suggestions on how to fix this are greatly appreciated. -twilight89
The noise from the TV is called 60 cycle hum and it is caused by a capacitor that is open, a test for ripple voltage will confirm this The noise from the VCR is more then likely common mode noise which would not be heard but for the bad capacitors in the TV. Simply put the common mode noise is being added to the 60 cycle hum. Now for how to fix this, if you have a background in electronics you can use a schematic, multimeter and an oscilloscope and Multimeter to find the bad capacitors, and the schematic to tell you what the voltages and %ripple should be. If you do not have a background in electronics, take the set to be repaired
Posted on Oct 04, 2007
SOURCE: Hitachi VCR F361
You need to change the Audio / Control Head, as well as the Pinch Roller of the machine. A worn out Audio cum Control Head will reflect in poor tracking and so will cause the above problems.
Posted on Oct 01, 2007
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