Inverter 27V (M 1 - M4 Power Supplies) Checks - LG 42LH90 Manual

Inverter 27V (M 1
Inverter 27V (M 1
There are actually 4 power
supplies developing 27.5V for the
LED blocks. They are designated
as "M1 through M4" This one is
M3. Each of the 4 have the same
components.
Q4, Q5, Q11, Q11, Q12,
Q204, Q205, Q211, Q212
Gnd 3.67V
23.9V
D2, D3, D7, D8, D202,
D203, D207, D208
26.4V
28.0V
- M4 Power Supplies) Checks
- M4 Power Supplies) Checks
Gnd
Gnd
3.74V
Q2, Q10,
Q202, Q210
Example of M3 (27.5V) Power Supply
Gnd 4.0V 3.73V
54 February 2010
6.75V 4.0V
Q3, Q09
Q203, Q209
LCD DV 42LH90