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Troubleshooting



5. Troubleshooting
5-1 No Raster



Abnormal Check Normal
ST-BY




Abnormal Check ST5V Normal
Q804 "E"




Check VIN(DC) Normal Abnormal Check ON/OFF Normal
TS801S PIN 13 IC903 ; 3.3V



Check Check
Abnormal Check ST5V Normal MICOM MICOM
HC801"D809"



Check Check
FA803S FA801S




Normal Abnormal Check Normal Check Abnormal Check9V:R829, IC803
GND SHORT B+(135V) F-BOX 5V, 9V 5V:R827, FA802S



Check
HC401 J6920
Normal Check
F-BOX HD,VD
Normal Check Abnormal
Vin(dc)T801S
Abnormal

Check Check
DZ801,DZ802, FP801S
DZ803,IC804
Check Check
Check HIC401 H-BLK
F-BOX I C Q402 V-BLK



Check
CRT ASSY
R529
REPLACE
F-BOX




Samsung Electronics 5-1
Troubleshooting


5-2 No Sound



NO SOUND




Normal Check the Abnormal
signal of CN601


Check Abnormal Check the Normal
SPEAKER and WIRE input signal
of IC602 pins 7,11




Abnormal Check the
Check
input signal IC602 B+
of IC601

Normal Abnormal

Check Normal
TUNER B+ and SIF
Replace IC602 Check FA803S



Check Abnormal
IC601 B+


Normal

Check the signals CheckB+(BV) LINE
of pins 47,44,are input R815, IC805, FA802S

Normal

Check the signals
of pins 25,24 are input

Normal


Repace IC601




5-2 Samsung Electronics
Troubleshooting


5-3 No Power



Plug in the
Power Cord


ST-BY : LED
Check the oscillation of Abnomal
Nomal Check
Check Power LED X-Tal of IC901 pins 34, 35
X901, IC904
Check Reset of IC901 pin 33

Abnomal


Check IC901 B+ Nomal
(3.3VDD)


Abnomal Check/Replace IC901
Check I2C

Nomal
Check Q804


Check IC905 Nomal
Abnomal
E2PROM
HC801S Abnomal
FA801S Check 135V Line
FA802S

Abnomal Nomal
Check T444S Abnomal
FBT B+
Check Abnomal
CN901, CN902 Check F-BOX (5V)
Nomal

Check Check IC803, Nomal Check IC801S, Check the Horizontal
TRANS(12V) IC802,R827,R829 DZ801,DZ802, TR of HC401 "J6920"
PC801S,IC804
Check F-BOX
HD/VD

Abnomal




2
Check Check H-BLK,
Check F-BOX I C HIC401,Q402 V-BLK Line

Nomal



Replace F-BOX




Samsung Electronics 5-3
Troubleshooting


5-4 Horizontal Lines Appear




Horizontal
lines appear




Nomal Check IC301 B+ Abnomal
(16V, -13.5V)

Check B+ line and
fusible resistance
Nomal Check F-BOX B+
VD+, VD- Abnomal


Abnomal Replace R424, R425

Check / Replace Check IC802,IC803,
IC301 HC801,FA801S,FA803S




5-4 Samsung Electronics