| 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 |
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