Service Guide
SW-HF 5.1 5050
1.2.11. Keystrokes in the front panel no use
Problem
Analyze and
identify the
causes
Solutions
Version 1.1 Page 17 of 31
Keystrokes in the front panel no use
1. Defective, dry-soldered, or broken SW-HF5.1 5050 CON
PCB;
2. IC2 or IC3 damaged
3.. keystrokes not well –assembled
Check and replace