battery replacement question

[Castellen]

Saving the time from the standard WB time program (in prefs) should write the time and date to the RTC.

If you have a multimeter handy, turn the machine off and check for at least 3V between pins 18 and 9 of the RTC device, U178.

If you have a scope or counter, check for approx 32kHz on pins 16 or 17 with the machine off.  That gives a good indication if there is battery power there and the clock is running.


You might also try replacing the clock's data latch, U177, as this sometimes causes clock read/write problems.
Obviously you'll need access to SMD rework equipment for this.

Hopefully you haven't damaged the RP5C01 clock, as these are obsolete and can be hard to get.


Anthony.

[Castellen]

@ Tygre:
Can you be a little more specific?

If the "save" button in the Time Preferences is ghosted out, it means the system cannot see the real time clock (RTC).
If this is the case, then probably one of the PCB tracks around the RTC have gone open circuit due to corrosion.  Sometimes the data latch U177 can die due to corrosion damage.


If you have the trouble of the RTC working, but not remembering the time due to the battery not charging up, then one of the tracks that charge the battery (via the +12V line) is probably open circuit.


I have schematics and stuff you can use if you have a reasnoble electronics knowledge.  The circuit is very simple.

[Castellen]

Hi Castellen!
Could you post or send me the schematics, the battery works but the "Save" button is ghosted so something must be wrong...

Tygre

A revival of a 2003 thread; talk about scraping off the dust!

Anyway, you'll find all the information you need on my webserver here.