Sony DAV-FC7 DVD player wont run

Xtech · Guest

Hello,

I am working with a Sony DAV-FC7 DVD player/receiver. (the model and serial tag says HCD-FC7)

The unit will power up but wont play DVDs. There's currently one stuck in the deck right now, and the unit wont eject it. When I try to shut the unit off it flashes "standby" continuously. As I understand it this has been a big problem with these units, but this is the first one of this particular model that I have run across. I can repair the unit but I'm looking for some information that will assist me in troubleshooting it. I figure that one of the others here has already ran into this and can direct me to which components I need to focus on and tell me if there any service bulletins for this unit.

Any help appreciated,
Thank you

jts1957 · Joined: 24 Nov 2008 Posts: 2472 Location: Far, Far Away

Don't know if you've read: http://www.fixya.com/support/t253613-fac_fc7_dvd_player_locked_standby

vtech · Joined: 08 May 2006 Posts: 1264 Location: USA

Been a while & strictly working from memory;

I use to see this on a daily basis and am rather familiar with the problem. Yes, there were bulletins. Unfortunately I no longer have access to them but I can give you the following information; I will add that while it is not a very difficult task, it is a bit involved dismantling and if you are not good at working around SMD, it is best to let an Authorized servicer handle it.

When there are no mechanical problems(binding/etc), the main issue is related with the system processor IC 206 (marked ZIVA under the heatsink plate) on the earlier models.
It is a 208 pin, fine-pitch busy processor that tends to lock up due to a noisy bus clock line. This was on certain batch of them which translated in to a flashing "standby" in display. Depending on the amount of signal noise you could plug/unplug the unit and restore the operation but it would lock up again.
Initially, you could look for a certain letter/digit on the IC for verification but, in my experience, it was not always the case. So I would add the modification--if it was not already done.(apparent added resistor next to IC). Another way to verify the noisy clock was to view the pulse on a 60Meg or higher scope.

The remedy was to add a 1k resistor between reset pin(202) and bus clock pin(203) to solve the noise issue. On said units, you would need to slightly lift the bus-clock pin to gain enough soldering room---be super careful as the pin can easily brake off. At some point later, the modification was incorporated on the PC board.

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Guest · Posted: Sat Jan 24, 2009 4:52 pm Post subject:

Xtech · Guest

vtech · Joined: 08 May 2006 Posts: 1264 Location: USA

What you are describing is identical to the issue which only affected the DVD operation cycle but I can not tell you for sure if there has been any change since 2007.

If it did not have the mod, I had a 98 percent success rate in fixing the lockup issue( for verification,you could easily spot the added resistor next to the IC OR follow the pin/ trace pattern OR use a scope to view the distorted square wave on pin203.)

There was also something about the last digit or number printed on the ZIVA IC ... I just don't recall the details?

Btw, on the affected units, you would notice that pin 203 (bus clock) is only soldered to a tiny dummy trace underneath hence a need to lift for resistor connection.

Xtech · Guest