9A5TD <ham9a5td@[EMAIL PROTECTED]
> wrote in message
news:gd019u$baq$1@[EMAIL PROTECTED]
> Is there any way to find D444C RAM, 2 -pcs.
>
> I need it to repair one old HP function generator.
>
> TNX
>
>
Add uP or properly muP to the decice type if NEC
some related info from one of my tips files below
On transistors marked C???? read 2SC????,similarly
A????-2SA????,B????-2SB????,D???? read as 2SD????.
Also ICs marked A???? can mean LA???? (Sanyo) and
B???? can be LB????,C???? can be LC????.
Also C???? and PC???? can mean uPC???? (NEC,for u
read mu) and D???? can mean uPD????.
On Sony ICs of the 70s and 80s marked with 3 digit numbers and no
leading letter such as 174A and 174-2 read as CX174A and CX174-2
Motorola MC14??? usually you can drop the 1 and then read remainder as
normal CMOS 4000 series number.
Signal diodes with one wide band followed by 3 coloured bands ,
one convention, eg
wide red , black, blue,red may mean the last 3 digits of the
type is 062, in this particular case 1N3062
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
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