Ng Example - Panasonic UF-5500 Service Manual

13.4.1. NG Example

1.
5V
0V
2.
3.
ASIC
Short circuit from the adjacent signal wires.
Check for a short circuit in the RA and IC leads and the signal wire
at the through hole.
Short between the signal line and GND.
Approx. 0 or 1 V
0V
RA
ROM
Solder fault on RA.
247
Solder waste
271
Through hole
OR IC malfunction
UF-5500 / 4500
Solder ball
Chip