- Thread starter r67055
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I changed 6 pieces of Ram. I always got the same error. I think it's not the Ram that's at fault. Lines are good between RAM and LSPC. Is there anything else that could be wrong?
Could LSPC2 be the culprit after this? Could someone else be causing this error?
Could LSPC2 be the culprit after this? Could someone else be causing this error?
Thats a great hint that its traces, not dead ICs that cause this.
Can you check if there is continuity between the RAM ICs where there should be?
Basically, the address lanes have to have continuity between both ICs, the IOs/Data lanes not, the /OE and /CE and other control lanes will switch on/off the individual ICs.
This is a picture of the backup RAM, but same principle:
Converting Hex to Binary is easier with this page IME:
https://www.rapidtables.com/convert/number/hex-to-binary.html
there is continuityThats a great hint that its traces, not dead ICs that cause this.
Can you check if there is continuity between the RAM ICs where there should be?
Basically, the address lanes have to have continuity between both ICs, the IOs/Data lanes not, the /OE and /CE and other control lanes will switch on/off the individual ICs.
This is a picture of the backup RAM, but same principle:
Converting Hex to Binary is easier with this page IME:
https://www.rapidtables.com/convert/number/hex-to-binary.html
rams 1-10 pin and 21-28 pin are connected together
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no . I'll check right away
there is no short circuit between the data lines
so 0404
is 0000010000000100 in binary/dual
sometimes documentation starts at 0, sometimes at 1, watch out for that
lets hav a look at the lower byte first: 00000100
thats either A2 (counting from 0) or A3 (counting from 1), that would be pins 176 on the LSPC2-A2, the trace looks at bit corroded (bottom left), use a simple jumper wire (but short!) for testing
Multimeters in diode test/continuity mode will often beep if the resistance is below 100 Ohms, need to check the display, as the audio feedback (beep) can be deveiving.
is 0000010000000100 in binary/dual
sometimes documentation starts at 0, sometimes at 1, watch out for that
lets hav a look at the lower byte first: 00000100
thats either A2 (counting from 0) or A3 (counting from 1), that would be pins 176 on the LSPC2-A2, the trace looks at bit corroded (bottom left), use a simple jumper wire (but short!) for testing
Multimeters in diode test/continuity mode will often beep if the resistance is below 100 Ohms, need to check the display, as the audio feedback (beep) can be deveiving.
I checked pin 176 and everything is fine. There is no error in the line.so 0404
is 0000010000000100 in binary/dual
sometimes documentation starts at 0, sometimes at 1, watch out for that
lets hav a look at the lower byte first: 00000100
thats either A2 (counting from 0) or A3 (counting from 1), that would be pins 176 on the LSPC2-A2, the trace looks at bit corroded (bottom left), use a simple jumper wire (but short!) for testing
Multimeters in diode test/continuity mode will often beep if the resistance is below 100 Ohms, need to check the display, as the audio feedback (beep) can be deveiving.
so 0404
is 0000010000000100 in binary/dual
sometimes documentation starts at 0, sometimes at 1, watch out for that
lets hav a look at the lower byte first: 00000100
thats either A2 (counting from 0) or A3 (counting from 1), that would be pins 176 on the LSPC2-A2, the trace looks at bit corroded (bottom left), use a simple jumper wire (but short!) for testing
Multimeters in diode test/continuity mode will often beep if the resistance is below 100 Ohms, need to check the display, as the audio feedback (beep) can be deveiving.
Attachments
Attachments
176 pins go to NEO-IO 63 pin
