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
Содержание DSD-9255E
Страница 17: ...16 CIRCUIT OPERATION MANUAL EMI Interface Timing...
Страница 40: ...39 SCHEMATIC DIAGRAM...
Страница 41: ...40 SCHEMATIC DIAGRAM...
Страница 42: ...41 SCHEMATIC DIAGRAM...
Страница 43: ...42 SCHEMATIC DIAGRAM...
Страница 44: ...43 SCHEMATIC DIAGRAM...
Страница 45: ...44 SCHEMATIC DIAGRAM...
Страница 46: ...45 PARTS PLACEMENT ARRANGEMENT...
Страница 47: ...46 PARTS PLACEMENT ARRANGEMENT...
Страница 48: ...47 PARTS PLACEMENT ARRANGEMENT DSD 9255 FRONT DSD 9256 FRONT...
Страница 49: ...48 PARTS PLACEMENT ARRANGEMENT...
Страница 50: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA DAEWOO ELECTRONICS Corp...
