LC-37XD1E/RU
4 – 8
DTV troubleshooting 2
No video output during
DTV reception. Colors
of Images are not right.
No audio output during
DTV reception. Sound
is low.
D-TUNER UNIT:
Is data FED[0:7] sent
from pins
(3),(4),(5),(6),(8),(9),
(10) and (11) of P202?
NO
Check R272 and R273.
DIGITAL UNIT:
Is audio signal fed to
pins (5) and (10) of
IC4604 (OP-AMP)?
NO
Check R4002(AD2pin)
and IC4001(D-Proces-
sor).
YES
YES
DIGITAL UNIT:
Are video signals (R/G/
B,CVBS) sent from
C4639/C4640/C4641/
C4625?
NO
Check
R4011(AC8pin),R4013(A
C9pin) and IC4001(D-Pro-
cessor).
Is audio signal sent
from pins (7) and (8) of
IC4604(OP-AMP)?
NO
Check power supply of
IC4604(OP-AMP) and its
peripheral circuits.
YES
YES
Are video signals (R/G/
B,CVBS) send from the
C4636/C4637/C4638
and emitters of Q4607?
NO
Check Q4601-
Q4605,Q4607 and their
peripheral circuits.
MAIN UNIT:
Is audio signal sent to
pin (3) and (13) of
IC2704 (SW)?
NO
Check power supply and
control signal of pins (9)
and (10) of IC2704(SW)
and audio signal input of
pins (4) and (11) of
IC2704.
YES
YES
MAIN UNIT:
Are video signals (R/G/
B,CVBS) fed from pins
(AA18),(AB18),(Y18)
and (AA21) of IC3002?
Perform the same
check as the tuner (U/
V) reception.
.
YES
Are scrambled images
not displyed?
YES
DIGITAL UNIT:
Check 5V output of pin (1)
of IC4702.
Check 5V of pin (6) of
Q4401.
NO
Perform the same
check as the tuner (U/V)
reception.
Summary of Contents for LC-37XD1E
Page 4: ...LC 37XD1E RU 1 1 LC 37XD1E Service Manual CHAPTER 1 OPERATION MANUAL 1 SPECIFICATIONS ...
Page 5: ...LC 37XD1E RU 1 2 2 OPERATION MANUAL ...
Page 6: ...LC 37XD1E RU 1 3 ...
Page 7: ...LC 37XD1E RU 1 4 ...
Page 79: ...LC 37XD1E RU 5 25 MEMO ...
Page 81: ...LC 37XD1E RU 6 2 ...
Page 82: ...LC 37XD1E RU 6 3 2 POWER BLOCK DIAGRAM ...
Page 83: ...LC 37XD1E RU 6 4 ...
Page 84: ...LC 37XD1E RU 6 5 3 WIRING DIAGRAM ...
Page 85: ...LC 37XD1E RU 6 6 ...
Page 90: ...LC 37XD1E RU 7 5 MAIN Unit Conponent Side B 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 ...
Page 99: ...LC 37XD1E RU 7 14 11 12 13 14 15 16 17 18 19 20 ...
Page 105: ...LC 37XD1E RU 7 20 11 12 13 14 15 16 17 18 19 20 ...
Page 108: ...LC 37XD1E RU 7 23 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 DIGITAL Unit Side B ...
Page 109: ...LC 37XD1E RU 7 24 11 12 13 14 15 16 17 18 19 20 ...
Page 112: ...LC 37XD1E RU 7 27 M E M O ...
Page 114: ...LC 37XD1E RU 8 2 2 SCHEMATIC DIAGRAM 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 1 ...
Page 115: ...LC 37XD1E RU 8 3 11 12 13 14 15 16 17 18 19 20 ...
Page 116: ...LC 37XD1E RU 8 4 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 2 ...
Page 117: ...LC 37XD1E RU 8 5 11 12 13 14 15 16 17 18 19 20 ...
Page 118: ...LC 37XD1E RU 8 6 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 3 ...
Page 119: ...LC 37XD1E RU 8 7 11 12 13 14 15 16 17 18 19 20 ...
Page 120: ...LC 37XD1E RU 8 8 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 4 ...
Page 121: ...LC 37XD1E RU 8 9 11 12 13 14 15 16 17 18 19 20 ...
Page 122: ...LC 37XD1E RU 8 10 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 5 ...
Page 123: ...LC 37XD1E RU 8 11 11 12 13 14 15 16 17 18 19 20 ...
Page 124: ...LC 37XD1E RU 8 12 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 6 ...
Page 125: ...LC 37XD1E RU 8 13 11 12 13 14 15 16 17 18 19 20 ...
Page 126: ...LC 37XD1E RU 8 14 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 7 ...
Page 127: ...LC 37XD1E RU 8 15 11 12 13 14 15 16 17 18 19 20 ...
Page 128: ...LC 37XD1E RU 8 16 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 MAIN Unit 8 ...
Page 129: ...LC 37XD1E RU 8 17 11 12 13 14 15 16 17 18 19 20 ...
Page 130: ...LC 37XD1E RU 8 18 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 AV Unit ...
Page 131: ...LC 37XD1E RU 8 19 11 12 13 14 15 16 17 18 19 20 ...
Page 132: ...LC 37XD1E RU 8 20 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 POWER Unit ...
Page 133: ...LC 37XD1E RU 8 21 11 12 13 14 15 16 17 18 19 20 ...
Page 134: ...LC 37XD1E RU 8 22 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 D TUNER Unit ...
Page 135: ...LC 37XD1E RU 8 23 11 12 13 14 15 16 17 18 19 20 ...
Page 136: ...LC 37XD1E RU 8 24 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 DIGITAL Unit 1 ...
Page 137: ...LC 37XD1E RU 8 25 11 12 13 14 15 16 17 18 19 20 ...
Page 138: ...LC 37XD1E RU 8 26 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 DIGITAL Unit 2 ...
Page 139: ...LC 37XD1E RU 8 27 11 12 13 14 15 16 17 18 19 20 ...
Page 140: ...LC 37XD1E RU 8 28 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 DIGITAL Unit 3 ...
Page 141: ...LC 37XD1E RU 8 29 11 12 13 14 15 16 17 18 19 20 ...
Page 142: ...LC 37XD1E RU 8 30 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 DIGITAL Unit 4 ...
Page 143: ...LC 37XD1E RU 8 31 11 12 13 14 15 16 17 18 19 20 ...
Page 144: ...LC 37XD1E RU 8 32 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 KEY Unit ...
Page 145: ...LC 37XD1E RU 8 33 1 2 3 4 5 6 7 8 9 A B C D E F G H I J 10 R C LED Unit ...
Page 146: ...LC 37XD1E RU 8 34 M E M O ...
Page 180: ...LC 37XD1E RU 34 12 PACKING PARTS S1 S2 S2 S7 S4 S3 S6 S2 S2 ...