Samsung TT14A54X/XAX, Service Manual

Page: 19 / 56

6-2 No Picture or Raster
Troubleshooting
6-2 Samsung Electronics
Normal
Abnormal
Normal
Normal
Abnormal
Normal
Abnormal
Normal
Check
the voltage of IC202, IC201,
TU01,VDD
Check the main power
Abnormal
Check the
voltage of IC201 pin 5
(Normal : 5V)
Check/Replace
TU01, IC201.
Check/Replace L205
Check the voltage
of tuner
Check IC901
Pin 14
Abnormal
Check/Replace
IC202
Check the output
of IC201 Pin 47, Pin 9
Check
the signal input
of IC202 Pin 1
Check the voltage
of IC201 Pin 44
Normal : 2.5V
Check
the signal output
to IC202 Pin 6
Check C239
Check
the signal output to
IC201 Pin 41
Check the voltage
of tuner
Check
the signal input
of IC201 Pin 37
Check/Replace
IC201.
Check the signal
output to IC201 Pin 41
Check/Replace
tuner
Check T444 B+ (125V)
Check the coil voltage
of Q804
Check
the signal input to
IC200 Pin 19,20,21
Check the voltage
IC200 Pin 29
Check the voltage
of Tuner
Check
the voltages of CRT Drive
(180V, 9V)
Check/Replace
F/S circuit
Check the voltage
of Tuner
Check the signal
input to CRT cathode
Check/Replace
CRT
Abnormal
Abnormal
Normal
Abnormal
Abnormal
Normal
Normal
Abnormal
Normal
Abnormal
Abnormal Abnormal
Abnormal
Normal
Normal
Abnormal
Abnormal
Normal