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I had the PVR 9200T clock problem a couple of years ago and managed to solve it using the excellent instructions. However, it has just reappeared and this time cleaning the clock board hasn’t fixed it. Is it worth trying again or is the clock module likely to be permanently broken?
I also had this re-occur but re-cleaning the board fixed it for a while again. It’s worth another try but if it still doesn’t work you may need to replace the whole clock board, if they are still available.
Thanks. I’ll have another go.
I tried again and it seems to have worked this time. The clock showed –:– when I first switched the power on, so I’m still not sure if it’s OK, but it has been showing the time correctly after I used it for a bit.
AIUI the time is picked up from the broadcast signal so would initially be –:– until it sets itself.
Glad it seems to be sorted again.
This clock thing….mine’s just started doing it. Before I take the board out and start cleaning, is this problem having a detrimental effect on the PVR, ie: it won’t know when to record, or is the clock display just busted?
Thanks!
Withnail73 – 1 hour ago »
is this problem having a detrimental effect on the PVR, ie: it won’t know when to record, or is the clock display just busted?
It will not record from standby with the clock inoperative.
Cheers!
My 9200T had this problem. I read about the fix of cleaning the board and thought that if the RTC chip ( 8563T ) is this sensitive then there is probably a real fault hiding there. I fixed it by changing the crystal.
I found a replacement on Ebay, just search for “crystal 32.768KHz”,
for about 1£ +p&p. There are several sizes available, you need a silver cylindrical type about 6mm long. It is probably best to disconnect the standby battery while replacing the crystal.
My 9200T had this problem. I read about the fix of cleaning the board and thought that if the Real Time Clock chip ( 8563T ) is this sensitive then there is probably a real fault hiding there. I fixed it by changing the crystal.
I found a replacement on Ebay, just search for “crystal 32.768KHz”,
for about 1£ +p&p. There are several sizes available, you need a silver cylindrical type about 6mm long. It is probably best to disconnect the standby battery while replacing the crystal.
Admin Edit: Moved post to thread you have already contributed to, please only post same/similar info once.
Pottsy – 1 hour ago »
My 9200T had this problem. I read about the fix of cleaning the board and thought that if the Real Time Clock chip ( 8563T ) is this sensitive then there is probably a real fault hiding there. I fixed it by changing the crystal.
I found a replacement on Ebay, just search for “crystal 32.768KHz”,
for about 1£ +p&p. There are several sizes available, you need a silver cylindrical type about 6mm long. It is probably best to disconnect the standby battery while replacing the crystal.
Admin Edit: Moved post to thread you have already contributed to, please only post same/similar info once.
The ‘real problem’ is the contamination chemically generating a voltage that shuts down the RTC oscillator. In changing the crystal you will have simply disturbed that contamination by the action of soldering. Changing the crystal, or anything else for that matter, is not necessary.
aldaweb – 1 year ago »
AIUI the time is picked up from the broadcast signal so would initially be –:– until it sets itself.
Glad it seems to be sorted again.
Sorry I missed this thread as I’m usually in Cornwall June/July time when this thread started. If I remember correctly (without my notes to hand) a successfully repaired clock starts at 13:00 and then corrects itself when a broadcast is received.
Isn’t it possible that the cleaning action with the standby battery still connected is enough to trigger the oscillator to start again? Let’s wait to see if anybody who has had the clock problem a second time is able to fix it by changing the crystal.
Pottsy – 24 minutes ago »
Isn’t it possible that the cleaning action with the standby battery still connected is enough to trigger the oscillator to start again? Let’s wait to see if anybody who has had the clock problem a second time is able to fix it by changing the crystal.
But if you read the original post by Biggles you would know that he actually measured the voltage produced by the contamination on the board and saw it decrease as he cleaned the board.
Pottsy – 26 minutes ago »
Isn’t it possible that the cleaning action with the standby battery still connected is enough to trigger the oscillator to start again? Let’s wait to see if anybody who has had the clock problem a second time is able to fix it by changing the crystal.
Totally irrelevant. I can simulate the problem exactly as it happens, the cause of the problem is not in question.
If people want to change the crystal or any other component then that is up to them, but I repeat it is not necessary. If you had been interested in this problem for as long as I have and read all the posts before I discovered the cause of the problem then you would know that several people had effected a ‘repair’ by changing components, but they didn’t last. The reason being simply that the contamination had been disturbed by the action of soldering but the boards soon failed again. Suggesting to people to change a component when it isn’t necessary is irresponsible, not everybody has the skills to do the job successfully.
If people are having second failures it is because they didn’t do the job correctly in the first place, as far as I’m aware the two boards I repaired are still working.
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