FUNAI F42PDME Service Manual page 86

FLOW CHART NO.8
Mis-discharge
Are the Y SUS B/D unit and Z SUS B/D unit signal
cables normal?
Check diode value of P11 on Y DRV UPPER B/D unit
and P9 on Y DRV LOWER B/D unit.
Normal diode value. Defective diode value=0.018
(In case of Panasonic
IC=1.035)
*It is different from each IC Maker.
(In case of TI IC=0.6~0.7)
Check that the specific voltage is input to the following
point.
R31 -75V (-Vy)
R30 +115V (Vscw)
Refer to FLOW CHART NO.3 (No display (Y SUS B/D unit)).
Check Y SUS B/D unit, Z SUS B/D unit IPM fail.
Forward : test 1 GND(+) , Sus-out(-)
test 2 Sus-out(+),Vs(-)
test 3 ER-DN(-),ER-COM(+)
test 4 ER-COM(-),ER-UP(+)
when each 4 TEST Diode value is over 0.4V
Reverse : test 1 GND(-) , Sus-out(+)
test 2 Sus-out(-),Vs(+)
test 3 ER-DN(+),ER-COM(-)
test 4 ER-COM(+),ER-UP(-)
when each 4 TEST Diode value is infinity
Replace the LVDS CTRL B/D unit.
No
Yes
No
P11
Y DRV
UPPER
B/D unit
Yes
No
Yes
No
ER-COM
Yes
Confirms whether the connector is connected properly.
Replace Y DRV UPPER B/D unit or Y DRV LOWER
B/D unit.
*Mis-discharge
Replace the Y SUS B/D unit.
Replace the Y SUS B/D unit or Z SUS B/D unit.
GND
Sus-out
Vs
ER-DN
ER-UP
Y SUS B/D unit.
2-3-7
PDMTR2