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Repair Flow Chart:Trouble Condition
Power LED
turns OFF within 10 seconds after the TV power turns
on.
Power LED turns OFF within
10 seconds after TV power
turns on.
For Main board:
Is 3.3V supplied to“K8B Pin1”during
LED power on ?
Unplug cable from Main board
to T-Con board whether the
symptom
changed?
Main board can not work.
Replace “Main board”.
For Power board:
Are the 12V and 24V supplied from “K7B Pin6/7&9 ”
during LED power on?
Main board can not work.
Replace “Main board ”.
T-Con board can not work.
Main board may also can not work.
Replace “T-Con board&Main board”.
Power board can not work.
Replace “Power board.”
No:0V
Yes:3.3V
Yes
No
No:0V
Yes
Page 4
(TABLE *1.0) Main board: Power-on Test Points
42" Models
Power-on on
Main
board
Confirmation Voltage
P42142-00 Z5GH
P42142M-00 Z5GHM
P42142-02 Z5GK
P42142M-02 Z5GKM
Main
K8B Pin1
3.3V
(TABLE *2.0) Power board: 12V Test Points
42" Models
12V on Power board
Confirmation Voltage
P42142-00 Z5GH
P42142M-00 Z5GHM
P42142-02 Z5GK
P42142M-02 Z5GKM
Power K7B Pin6/7
12V
(TABLE *3.0) Power board: 24V Test Points
42" Models
24V on Power board
Confirmation Voltage
P42142-00 Z5GH
P42142M-00 Z5GHM
P42142-02 Z5GK
P42142M-02 Z5GKM
Power K7B Pin9
24V
Содержание DP42142
Страница 36: ... 30 䎳䎲䎺䎨䎵䎃䎥䏏䏒䏆䏎 䎃 䎃䏉䏒䏕䎃䎸䎶䎕䎭 BLOCK DIAGRAM POWER LINES ...
Страница 40: ... 34 IC6600_C0DBZYY00485 USB Protection IC6700_C0CBAYG00009_LM1117S ADJ IC6560_C0JBAA000502_TC7SET08FU ...
Страница 41: ... 35 IC5700_C3ABSY000102_IC H5PS5162GFR S6C IC6720_C0DBAYY01122_BD9328EFJ E2 ...
Страница 46: ... 40 IC DIODE AND TRANSISTOR PIN LAYOUTS ...