Panasonic JB-3300 Technical Manual page 326

D)
Check
Reset
Input
meme
Trouble-
shooting (2)
Check Pin 4 of
Microprocessor
processor has
low input more
Check
than 50 ms
None
for Breakage
and Short
Control by Unit
is Abnormal
Repair Broken or
Yes - Shorted Pattern
More than
50 ms
No
Check Pattern C) Check after
Connected to Confiriming
Pin 4 of Microprocessor
Microprocessor Scan Output
"| Control by Unit is Abnormal
Repair Broken or Shorted
Pattern
IV - 26