Question Analyze; Before Check Of Power On - Alesis CD-TWIN Service Manual

1.4 Question Analyze

1.4.1 Before check of power on

PCBA Before
check of power on
Visual check all of PCBA
component and solder contact
check solder contact
short or lack and component
hollow or wrong
NO
use surveying instrument to
measure power and gnd
open / short
Relate Power have
open or short
NO
step 2
a). CD-BACKUP Mode Analyze
b). USB Mode Analyze
Fixed question:
YES solder contact: short / lack
component: hollow / wrong
Fixed question:
YES check Power relate circuit
block
10