29
FIXING ERRORS
(1) Locking Error
2. Poor quality screen
Check the power status of
tuner(30V,
VCC_TUNER,3V3)
30V, 3V3 voltage OK?
Tr(Q808)OK?(VCC_TUNER)
Replace the SMPS
Replace Q808.
LNBP Input control?
LNBP output OK?(IC27
PIN3)
Eliminate problem causing factors.
Replace LNBP
Check the power of
LNB(13V/18V)
12C Line Check?
Reset Check?
Check Locking Voltage(1-16V)
Tuner PIN 13 near TP
Replace Tuner
B
Check IC related parts.
Check and eliminate
problem parts.
Check Reset
Circuit
Eliminate problems.
Replace Tuner
NO
YES
NO
NO
YES
YES
NO
NO
NO
NO
NO
YES
YES
NO
YES
YES
NO
YES
2. Poor quality screen
Summary of Contents for DSD-9255M
Page 17: ...16 CIRCUIT OPERATION MANUAL EMI Interface Timing...
Page 40: ...39 SCHEMATIC DIAGRAM...
Page 41: ...40 SCHEMATIC DIAGRAM...
Page 42: ...41 SCHEMATIC DIAGRAM...
Page 43: ...42 SCHEMATIC DIAGRAM...
Page 44: ...43 SCHEMATIC DIAGRAM...
Page 45: ...44 SCHEMATIC DIAGRAM...
Page 46: ...45 PARTS PLACEMENT ARRANGEMENT...
Page 47: ...46 PARTS PLACEMENT ARRANGEMENT...
Page 48: ...47 PARTS PLACEMENT ARRANGEMENT DSD 9255 FRONT DSD 9256 FRONT...
Page 49: ...48 PARTS PLACEMENT ARRANGEMENT...
Page 50: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp...
