LG 50PK550, Руководство по обслуживанию

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THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
0.1uF
16V
C506
1.2V_1.8V_EN
0 R512
+5V_ST
6
.2
K
1%
R
53
6
0.1uF
16V
C559
RL_ON
AC_DET
10uF
25V
C544
10uF
6.3V
C502
10uF
6.3V
READY
C522
RL_ON
5V_ON
P_+5V
P_17V
0.1uF
C553
0.1uF
50V
C518
+3.3V_ST
CB4532UK121E
EAM38058401
L501
MP8706EN-C247-LF-Z
IC505
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
MLB-201209-0120P-N2
0LCML00003B
L506
0.1uF
16V
C515
10K
READY
R501
+5V_TU
10uF
6.3V
READY
C505
100
R514
CB3216PA501E
EAM44020101
L502
0.1uF
16V
C507
100uF
16V
C523
NR8040T100M
10uH
L515
10K
R533
0.1uF
16V
C521
100uF
16V
C501
10uF
6.3V
C513
10uF
6.3V
READY
C500
ERROR_DET
0.1uF
16V
C503
+5V_ST
0.1uF
16V
C509
AP2121N-3.3TRE1
EAN58801701
IC506
1
GND
2 VOUT 3
VIN
MLB-201209-0120P-N2
0LCML00003B
L516
100
R502
10uF
6.3V
C508
10uF
6.3V
C557
L507
+5V_ST
33uF
25V
C519
D3.3V
100
R506
10K
READY
R500
10uF
6.3V
C558
0.1uF
16V
C520
10K
READY
R513
1uF
50V
C552
D1.8V
P_17V
L
5
1
1
+3.3V_NEC_ST
MLB-201209-0120P-N2
0LCML00003B
L504
A2.5V
9
1
0
1%
R
50
4
6
6
.5
1%
R
50
5
1K
1%
R509
AZ1085S-ADJTR/E1
0IPMG78346A
IC502
1
ADJ/GND
2 OUTPUT 3
INPUT
MLB-201209-0120P-N2
0LCML00003B
L505
SMAW200-H18S1
P500
14
9
4
18
13
8
3
17
12
7
2
16
11
6
1
15
10
5
19
100K
R515
22uF
16V
C538
0
R522
22uF
16V
C536
0.1uF
C535
1.2V_1.8V_EN
2uH
L509
22uF
16V
C530
0
R523
0.1uF
C529
0
R520
0.1uF
C531
22uF
C533
22uF
16V
C537
BLM18PG121SN1D
L510
10
R516
A1.2V
0.1uF
16V
C543
0.1uF
C528
D1.2V
1uF
10V
C532
100uF
16V
C517
100uF
16V
C525
100uF
16V
READY
C516
100uF
16V
C556
100K
READY
R531
A3.3V
0.1uF
16V
C542
1
.2
K
1%
R
52
9
47
R519
UBW2012-121F
L514
1/8W
13K
1%
R530
39
K
1%
R
52
8
0
R527
1uF
C540
47uF
16V
C526
+3.3V_EN
001:H5
22uF
10V
C541
22uF
10V
C549
0.1uF
C534
100uF
16V
C548
D3.3V
MP8706EN-C247-LF-Z
IC504
3
SW_2
2
SW_1
4
BST
1
IN
5
EN/SYNC
6
FB
7
VCC
8
GND
3.6uH
L508
22uF
10V
C527
0.1uF
16V
C550
100uF
16V
READY
C551
470K
1%
R521
820K
1%
R525
1/10W
10K
1%
R510
0.01uF
25V
C561
6.8K
R503
22uF
10V
C512
NR8040T3R6N
3.6uH
L503
0
.0
1
u
F
25
V
C
51
0
22uF
10V
C504
100pF
50V
READY
C562
10K
R508
0.01uF
25V
C511
0.1uF
C564
E
N
1
0
5J
1
2
CI
C
L
5
0
0
10.5K
1%
R511
1/10W
47
5%
R532
MP2108DQ
IC501
3
LX
2
VIN
4
PGND
1
BST
5
SGND
6
SS
7
FB
8
COMP
9
VREF
10
RUN
TH
ER
M
A
L
MP2208DL-LF-Z
IC503
3
PGND_1
2
SS
4
SW_1
1
AGND
6
NC
5
IN_1
7
BS
8
VCC
9
POK
10
IN_2
11
SW_2
12
PGND_2
13
EN/SYNC
14
FB
1
5
EP
3300pF
50V
C514
P_+5V
P_+5V
+5V_ST
+5V_ST
1/10W
0
5%
R539
15
K
1%
R
53
5
18
K
1%
R
54
0
1/10W
0
5%
R537
1/10W
300K
5%
R538
5 1 3
Vout=(1+R1/R2)*0.8
TUNER 5V
CURRENT: MAX 3A
Multi Power(5V -->3.3V)
R1
BCM3556 core 2.5V
CURRENT: MAX 6A
POWER Wafer 24P
3A
Multi Power(5V -->2.5V)
POWER B/D
Stand-by (5VST --> +3.3V)
R2
MUST BE CHANGE ADJ LDO
AFTER THEN CHECK CST
V0 = 1.25(1+R2/R1)
R1
R2
CURRENT: MAX 3A
R1
Vout=0.8*(1+R1/R2)
R2
130mA
3A
Vout=0.8*(1+R1/R2)
R1
R2
R1
300 mA
R2
Placed on SMD-TOP
Vout=0.9*(1+R2/R1)=1.845
Placed on SMD-TOP
C IN
3A
R e p l a c e d P a r t
0 8 / 1 0 / x x
SMPS POWER
BCM AUS DVR
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Only for training and service purposes
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