Y-Sus Board Checking Method(50R3); Specifications - LG 42PT250 Service Manual

Repair Process-Reference data
PDP TV
Symptom
▣ Check Method
① Check input voltages(5V, Va, Vs) at P103 connector.
② Check it is short or not between Vs and GND at P103 connector.
③ Check all of fuses open. (FS201, FS202, FS203, FS501)
④ Check voltage of diode , FET by using digital multi-meter.
▣ Measurement method
Diode

▣ Specifications

Position Direction
HS601
Forward 0.35V ~ 0.45V
Reverse
HS602 Forward 0.35V ~ 0.45V
Reverse
HS603 Forward 0.35V ~ 0.45V
Reverse
©
C o p y r i g h t
A. Picture Problem

Y-Sus Board Checking Method(50R3)

FET
Circuit No.
D610
Q606,Q607 Q608,Q609
0.45V~0.55V 0.45V~0.55V
O.L. (Overload)
D604,D605 Q601,Q602
0.45V~0.55V
O.L. (Overload)
D602 Q603,Q605 Q610,Q612
0.35V ~ 0.45V 0.4V~0.5V
O.L. (Overload)
Making
Revision
YSUS board
A9 A8
A8
FS203
Vs fuse
P113
FS202
5V fuse
FS201
Va fuse
FS501
18V fuse
L G E I n t e r n a l U s e O n l y