Service Guide
SW-HF 2.1 1800K
1.2.2 no sound
Problem
Analyze and
identify the
causes
]
Solutions
Version 1.0 Page 8 of 24
No sound
Check the wire between
AMP PCB JACK1 and
MIC JACK1 connected
properly or
not
PCB short-circuited,
dry soldered or broken
1. IC3 in MIC PCB defective
2. Or caused by defective IC2
，
IC1
，
IC3
，
Q1
，
Q2
，
ZD1
，
ZD2, R13
，
R14
，
R22
，
R23
，
EC14
，
EC15
，
EC4
，
or EC5 in
A
MP
PCB
Repair, resolder or
replace
Repair or replace
Repair or replace
Summary of Contents for Genius SW-HF 2.1 1800K
Page 1: ...Service Guide SW HF 2 1 1800K SERVICE GUIDE KEY SYSTEM CORP Version 1 0 Page 1 of 24...
Page 18: ...Service Guide SW HF 2 1 1800K Version 1 0 Page 18 of 24 Chapter 3 Block diagram...
Page 19: ...Service Guide SW HF 2 1 1800K Subwoofer Version 1 0 Page 19 of 24 Chapter 4 Exploded view...
Page 20: ...Service Guide SW HF 2 1 1800K Satellite Version 1 0 Page 20 of 24 Chapter 4 Exploded view...
Page 23: ...Service Guide SW HF 2 1 1800K Chapter 7 Schematic diagram SW HF 2 1 1800K AMP PCB...
