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Service Guide
SW-HF 5.1 5050
1.2.2 no sound
Problem
Analyze and
identify the
causes
]
Solutions
Version 1.1 Page 8 of 31
PCB damaged, dry-soldered or
short-circuited
Assembled wires loosely- connected
between SW-HF5.1 5050 CON PCB JK1
and SW-HF5.1 INPUT PCB JACK2;
between SW-HF5.1 INPUT PCB JACK1
and SW-HF5.1 AMP PCB JACK1
No sound
1. Defective IC or IC2 on SW-HF5.1 5050CON PCB
2. Defective IC1, IC2 SW
-HF5.1 INPUT PCB
3. Defective IC1, IC2, IC3, IC4, IC5, IC6, IC7, IC8,
IC9, R28, R29, R52, EC18, EC19, EC20 in
SW-HF5.1 AMP PCB
4. Defective IC1
,
IC2
,
R15
,
R16 in
SW-HF5.1
SWAMP PCB
Resolder or replace
Check and replace defective
IC or components.