Troubleshooting Guide; No Power - Daewoo DTH-20D5FSN Service Manual

APPENDIX

TROUBLESHOOTING GUIDE

1.NO POWER

R805 R804
200 240K
1/4 W 1/4 W
DRAIN
R806
51
1/4 W
R807
240
1/4 W
ST-BY
<DRAIN OF I801>
FROM
FBT 10V
Check
F801(250V 4A)
F801
PWC1
C804
Check
450V
waveform
150uF
R802 L802
2.7M
1/4W
R803
2.7M
1/4W C805
2200P
1.6kV
C806
1200P
R810
1.6K
D805
100V(M)
1/4W
IN4937G
R811
R809
1K
1/4 W
7.5K
1/4 W
R808
C807
68K
1000P
1/4 W
100V(M)
PW ON
R416
RLY1
L801
TMS-3541T4
T801
D807
133V
B+
C814
D808
45V
#2
C815
D813
12V
C812
#6
#5
C882 C883
4700P 4700P
C881
NC I802
PC-817(LTV-817C)
R832
1/4 W
1K
34
D801(LT2A05G)
D801
R801
R801(10W 3.2)
Q804 TO I501 #34
OCP
C819
R814
133V
C820
TUNER
33V
R820
DR.TRNS B+
45V
SOUND B+
12V
R817
ST-BY
Q805
R818
5V
D812 C706
5.6Vz
Check
Voltage
12V
133V
R831
1K
1/4W
2
OUT PUT
INPUT
3
I803
PP133
GND
D831
C831
8.2Vz R833
0.1U(M)
1/4W
Q831
KTC945C-Y
FROM MICOM #42
PW ON : H
PW OFF : L
Check
Check
Check
Voltage
Check
Voltage
Check
Voltage
#42
Check
Voltage