Electronics > Repair
ADVANTEST R9211B
<< < (33/39) > >>
stfjohn:
CPU pins 24 and 25 are not grounded!
m k:

--- Quote from: stfjohn on October 30, 2024, 10:26:24 am ---CPU pin 24 connected to HC148 pin 10.

--- End quote ---


--- Quote from: stfjohn on November 10, 2024, 11:54:05 am ---Pin 10 HC148 connected to pin 7 LS07 and pin 7 LS164.

--- End quote ---

Which one is wrong?
stfjohn:
Sorry: CPU pin 25 conncted HC148 pin 9!
m k:
Can you find where HC148 pins 6 and 7 are connected?
Possibly to CPU 24 and 23.

E,
check also LS07 pin 10 connection to other even numbered pins of the same chip.
stfjohn:
HC148 pin 6 connected to CPU pin 23
HC148 pin 7 connected to CPU pin 24
LS07 pin 10 connected to HC148 pin 11
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod