FUNAI F42PDME Service Manual page 81

FLOW CHART NO.3
No display. (Y SUS B/D unit)
Check that the specific voltage is input to the following
terminals.
P6 3, 4pin +5.0V~+5.5V
P5 1, 2, 3pin +180V~+195V
Is the fuse(FS1,FS2) normal?
Check that the specific voltage is input to the following
point.
R27 +200V (Vsetup)
R31 -75V (-Vy)
R30 +115V (Vscw)
Check whether output voltages agrees with voltage
that represented in label.
Check diode between GND and Y SUS output.
P13
Y DRV
LOWER
B/D unit
Normal diode value = 0.4 (forward)
Normal diode value = OL (reverse)
Go to FLOW CHART NO.4
No display. (LVDS CTRL B/D unit)
No
Yes
No
Yes
No
Y SUS
B/D unit
Yes
No
Y SUS
B/D unit
P4
Yes
Refer to FLOW CHART NO.2 (No display (PDP PS unit)).
Replace the Y SUS B/D unit.
Replace the LVDS CTRL B/D unit.
R30 R31 R27
Y SUS B/D unit.
2-3-2
P5
P6
Fuse(FS1)
PDMTR2