1994 Sony Trinitron In-Car Navigation System KVD-6NV1

[mubd1234]

Hi all,

I've been on a bit of a spending spree online and bought three of these curious little TVs, never exported outside of Japan, for not much on a Japanese auction site and imported them into Australia. Essentially, it's a 6 inch Sony Trinitron CRT TV with a built in navigation system and video CD player, to be used inside a car. They date back to 1994. Two of the TVs I bought work, but the CD drive doesn't appear to read discs. One works and reads discs, but there is no picture on the CRT.

Here are a few photos of one which does work properly:







With the TV which has no picture, I can feel the static fuzz coming off the picture tube. I've taken the back off and had a bit of a visual look around inside (not touching anything because I don't want to get fried), but I couldn't see anything obvious like bulging capacitors or disconnected connectors. The video and audio outputs on the back work properly, so the video and audio circuitry seem to be in working order.

When I turn it on, I noticed that the high pitched noise you usually can hear with CRTs (if you're young enough) has a much lower pitch than normal. It's much easier to hear than my other identical TVs, and sounds like it's turning on and off very very rapidly - it's not a solid high pitched, almost inaudible tone like the other ones I have. Here's an audio recording of the faulty set turning on -

The noise is making me think that it could be a fault in the flyback transformer, but would anyone know anything else I should check before poking around there?

I only live on the other side of Sydney from Dave, so I can always send it into the mailbag as something interesting to send in if I can't repair it anyway.