Hi,
I have been having intermittent problems with the clock on my video recorder. When on standby the clock fails (displays ----) and hence will not autostart or record from standby. On opening the box it appeared that the clock crystal had been secured to a copper pad on the pcb with a white silicon-type substance (heat sink? But not sticky). The crystal had 'popped-up' and was no longer in contact with the pcb. Since re-securing the crystal (by pushing it down) the clock has behaved itself. I was not aware that a clock crystal needed either heat dissipation or the 'can' grounding? Is this a red herring?
The PVR is a Humax PVR9200T and the crystal is ...
Manufacturer: AEL CRYSTALS Order Code: SCC4065 WATCH CRYSTAL 32.768KHZ Frequency, output:32.768kHz Accuracy, frequency +@:20ppm Accuracy, frequency -@:20ppm Temp, op. min:-10=B0C Temp, op. max:60=B0C Capacitance, load:12.5pF Temperature stability +@:50ppm Crystal case type:Watch A Temperature stability -@:50ppm Thanks, Ian Perthshire