Sat Youtips - Samsung SCA-300

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Samsung SCA-300

The technical specifications and the top 4 repair information for SCA-300 Mediaguard Digital satellite receiver.

Samsung website: Link
Power supply
Software download
User Manual
NO LNB voltages (13V of 18V) or NO SIGNAL
C13, C18, C19, C21, C23, C24, C27, C29
IC3

Red dot in the picture or no picture
C13, C18,
C13, C18, C19, C21, C23, C24, C27, C29

4 vertical line in the display
C13, C18, of D9

Does not search horizontale channels (18V)
C13, C18, C19, C21, C23, C24, C27, C29

No display – Power supply problem
D9 (HER303)
Q1, R1, IC1, D 3, C13, C18
Q2, Q3, C 13, C18

no power

Components: Example pdf file 200kb
C13   470uF/16V
C19 1000uF/10V
C18 1000uF/10V
C21   220uF/25V
C22   100uF/35V
C23     47uF/35V
C24     47uF/35V
C29     47uF/50V
Q2, Q3    KSA928A
IC3         LM339

Use only capacitors with 105º C (300mA) and life duration from min. 3000 till 5000 hours.

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