LG 50PT490-ZD (CHASSIS:PD11K) Service Manual ▷ View online
Making
Revision
PDP TV
Symptom
A. Picture Problem
Check 5V, 17V on Power B/D
Repair Process-Reference data
A12
▣ Measure 5V voltage
Power Board
P813
P600
P813
▣ Measure 17V voltage
A12
17.02
Making
Revision
PDP TV
Symptom
A. Picture Problem
Control Board Checking Method(50R3)
Repair Process-Reference data
A13
▣ Checking Method
A13
① Check input voltages(5V of P105 / 18V of P2) at control
board.
board.
② Check LED is on.
③ If LED doesn’t work, check crystal X1 output.
④ Check 3.3V, 5V IC.
⑤ Check MCM at VS_DA by using digital multi meter.
③ Check Crystal(X1)
① Check Input voltage
④ Check IC ( IC53, IC51 )
Check oscillation of Crystal
(Normal: 25 MHZ)
MCM Check point
(+)VS_DA / (-) GND
(Normal: 3.3V )
⑤ Check MCM
3.3V
Pin 14,15 : 18V
IC51
IC53
P2(18V)
Pin14, 15
5V
3.3V
GND
P105_FL1,FL2(5V)
② Check LED On
Making
Revision
PDP TV
Symptom
A. Picture Problem
Mal discharge Symptom
Repair Process-Reference data
▣ Dark picture caused by Mal-discharge
A14
▣ Dot type Mal-discharge symptom
▣ Scan type Mal-discharge symptom
A14
Making
Revision
PDP TV
Symptom
A. Picture Problem
PDP Module Rom Ver. Checking method
Repair Process-Reference data
A15
▣ Check by using Rom Label on control board
Rom ver. Label
▣ Check by using SVC Remote controller
Press “In-start” →Press ”0413”
→ Select Panel Control → Check Module Rom ver.
→ Select Panel Control → Check Module Rom ver.
※Refer to the Module Rom upgrade manual
for Rom upgrade.
USB Type Jig
A15
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