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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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D444C - help to find
Is there any way to find D444C RAM, 2 -pcs.
I need it to repair one old HP function generator. TNX |
#2
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D444C - help to find
9A5TD wrote in message
... 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/ |
#3
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D444C - help to find
On Mon, 13 Oct 2008 19:42:22 +0200, "9A5TD"
put finger to keyboard and composed: Is there any way to find D444C RAM, 2 -pcs. I need it to repair one old HP function generator. TNX Some suggestions for compatible RAMs he http://www.nabble.com/Replacement-fo...td1232253.html - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#4
Posted to sci.electronics.components,sci.electronics.repair
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D444C - help to find
N Cook wrote: 9A5TD wrote in message ... 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 That has nothing to do with 'Random Access Memory'. -- http://improve-usenet.org/index.html aioe.org, Goggle Groups, and Web TV users must request to be white listed, or I will not see your messages. If you have broadband, your ISP may have a NNTP news server included in your account: http://www.usenettools.net/ISP.htm There are two kinds of people on this earth: The crazy, and the insane. The first sign of insanity is denying that you're crazy. |
#5
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D444C - help to find
On Oct 14, 1:42*am, "9A5TD" wrote:
Is there any way to find D444C RAM, 2 -pcs. I need it to repair one old HP function generator. TNX Are these the same chips used in the OSI C1P single board computers? They are having part numbers as like 2114 or 21L14. You may google on OSI C1P and ask their owners to sell some to you. The Cmos version is 5114 and I have come across them in the COSMOS elf user group. You may find some in the very old CASIO music keyboards. Allen |
#6
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D444C - help to find
On Oct 16, 10:35*am, Allen wrote:
On Oct 14, 1:42*am, "9A5TD" wrote: Is there any way to find D444C RAM, 2 -pcs. I need it to repair one old HP function generator. TNX Are these the same chips used in the OSI C1P single board computers? They are having part numbers as like 2114 or 21L14. *You may google on OSI C1P and ask their owners to sell some to you. *The Cmos version is 5114 and I have come across them in the COSMOS elf user group. You may find some in the very old CASIO music keyboards. Allen You can get them from here http://198.170.117.30/IC/STATIC.html The description of the chip is wrong. Should be 1024x4 bits static ram. Allen |
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