I only have a bad pdf of it, so that could be the problem.

Indeed check if there are 7 of the same type of transistor there and you can
try it on 2 way's. You can change them one with another or if it is a
leddisplay get the suspected transistor out of it then it must go dark. If
the problem is from pin 25 then check with an oscilloscoop if it's switching
right, looking to another pin with the same function for another segment.

Good luck PP

"Henry Kolesnik" schreef in bericht
m...
Peter
Thanks for the tip but I had previously checked the voltages on the
transistors you mention and all are B +4.44, E +4.58 and C -22.4 volts. I
discounted them as being the problem because there's only five and there
are seven segments. My guess is that these transistors are the individual
digit drivers as there are five digits and the segments are muxed from the
msm5524. If I look closely at the copy of a copy many times over of the
schematic I can see where a prevoius owner made notes indicating that the
center segment is driven by pin 25. Any more tips appreciated. As you
can tell I'm out of my league with this kind of stuff.

--

73
Hank WD5JFR
"eddumweer" wrote in message
...
Check the segment transistors position Q1052-Q1056 (2sa733a-q)

One of them will probably be shorted. The signals for the transistors are
coming from ic msm5524 controlling the frequency and time display.

Greetings Peter

"Henry Kolesnik" schreef in bericht
m...
It's a five digit display made of seven segment digits. The center or
"G" segment doesn't blank when zero is displayed so zero looks like an
eight. It has leading zero suppression and instead of the zero being
totally suppressed the center segment appears as a minus sign.

--

73
Hank WD5JFR
"dxAce" wrote in message
...


Henry Kolesnik wrote:

All the center segments stay bright, no blinking.

OK, what is it you wish to blank then? I owned a FRG-7700 for several
years.
What exactly do you mean by 'center segments'?


tnx

--

73
Hank WD5JFR
"dxAce" wrote in message
...


Henry Kolesnik wrote:

The freqency /time display doesn't blank any of the center segments
on
either time or frequency function. Any suggestions on a fix
appreciated.
The serial number is 59,800 and I wonder if anyone can tell me if
this is
an
early or late model?
tnx

Blank or blink?



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73
Hank WD5JFR