Panasonic PT-50LCZ70 Service Manual page 26

PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7
LED on the Main P.C.B. for Digital CH
- D8801: Sync Lock LED
(When Sync of Digital packet (MPEG2) is locked by IC8802, it lights up in RED)
- D8802: Error LED
(When MPEG data has many errors (Block noise in screen), it flickers in RED. In normal condition, it is off)
CN5501
HDMI IN 2
5
1
19
7
TP5017 TP5019
L5501
D5516 D5509 D5505
D5523 D5503
R5505
D5521 D5511 D5507
TP5048
L5033
L5001
L5002
C5010
TP5038
5566
2
CN5503
1
FL5505
TP5004
R5641
L5521
TP5006
C5612 R5643
C5613
TP5054
97 C5611
C5614
601 C5610
R5058
577
R5655
R5656
R5019
L5513
576 R5652
R5678
TP5515
R5033
TP5066
Q5002
C5573
C5570
C
B E
C5020
Q5001
C
TP5061
B E
C5019
R5052
1
IC5509
4
C5623
<Normal condition>
D8801 RED/D8802 OFF
Circuit from Tuner through IC8802 (Front End) is working good.
<Error condition>
D8801 OFF/D8802 OFF
Possibility: Tuner or IC8802 (Demodulator) is not working.
1. Check solder first.
D8801 ON/D8802 flickers RED
Possibility: AGC is not working. (IC8801 or Tuner)
1. Check solder first.
Note:
If received signal level is too low, D8801 goes off.
R5546
Q5504 C5509
R5544
TP5021
R5006
TP5033
5 4
TP8823
D5501
CN5501
R8934 R8802
8 1
R8862
R8887
R5531 TP5031
C5511 TP8824
TP8825
R8861 108
TP8827
109
TP8826
R8860
TP8812
R8823
C5008 C5007
L5003
TP5000
FL8801
TP5002
C5005 C5006
R8822
R5552
TP8811
FL8802
TP5008
D5528
R5676 R8815
TP8815
30
R8801
29
144
1
C5606
FL5504
L5520
TP5058
TP5052
R5057
TP8816
R5056
IC5508
5 4
L5516
1
3
C5587
C5624
C5000
C5599
R5622
FL5502
L5515
TP5044
R5050
C5016
Q5518
6 4
R8447
R5048
TP5042
R8420
1
3
C5018
R8472
8
C5609
R8471
R8476
L5518
C5607
5 R8474
R8479
R8440
R5661
R8500
R8443
R8518
TP8821
C8914
D8801
C8908
73
72
R8927
D8802
R8873
R8959
D8803 R8899
IC8802
C8895
R8889
Q8803
1 6
3 4
R8811
C8892
R8809
C8887
R8808
R8810
37
36 C8890
CN8801
C8880C8881
C8878
C8885
1 2
C8879 R8842 R8843
C8872
C8871 R8841
X8801
19 20
55 56
R8473
R8470
R8425
R8453
R8484
R8419
R8448
CN8402
R8446
26
D8802
D8801
D8802