Service manual

12
DC to DC Module block trouble shooting
Check U11Pin2 or Pin3 have 5V input ?
Check U11Pin4 have 3.3V input ? (when power on)
Check U11Pin4 have 0V input ? (when power off)
Check U11Pin7 have 9V output ?
y
es
y
es
y
es
Check U11Pin9 have -6V output ?
yes
Check U11Pin14 have 18V output ?
Check U11Pin12 have 3.6V output ?
yes
yes
En
d
Replace Dc to Dc Module (U11)
component
no
no
no
no
no
U11
p
in 2 & 3 = 5V
U11 pin 4 = 3.3V(power on) or
0V(power off)
U11
p
in 7 = 9V
U11
p
in 9 = -6V
U11
p
in 12 = 3.6V
U11
p
in 12 = 3.6V