TROUBLE SHOOTING
40
5. MPEG BOARD
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
NO
<Bad soldering of R37,R42 can make white and black screen
NO
Check soldering or replace it
+1.2V regulator(Q14Pin2) Check
+3.3V regulator(Q13 Pin2) Check
that voltage is between 3.3v-3.5v
that voltage is between 1.2v-1.3v
Check all Connectors
CON7
Check +5v (Pin4,6)
Check Power Circuit
+3.3v regulator(FB2) for
SDRAM(IC104) Check +3.3V
Check soldering or replace it
RESET Signal Q100
of Collector
S5L5008A01 Crystal (X100)
Check whether X100 (27MHz)
Oscillates
Check soldering or replace it
Flash (IC U107) Check
CE#(Pin22)&OE#(Pin24)
&Adds line
Check soldering or replace it
Check soldering
or reprogramming Flash
or replace it
Check R20
1.3K resistor
Check C108,R133,R134,D100
YES
YES
YES
Check soldering of other parts
Содержание DG-K301
Страница 13: ...12 CIRCUIT OPERATIONAL DESCRIPTION 3 SDRAM MMSD416T216 O SDROM MMSD416T216 O Pin Assignments ...
Страница 20: ...CIRCUIT DIAGRAM 19 2 DECODE BOARD SCHEMATIC DIAGRAM ...
Страница 21: ...CIRCUIT DIAGRAM 20 ...
Страница 22: ...CIRCUIT DIAGRAM 21 ...
Страница 25: ...24 PCB CIRCUIT BOARD 1 POWER SUPPLY BOARD ...
Страница 26: ...PCB CIRCUIT BOARD 25 2 DECODE BOARD ...
Страница 27: ...PCB CIRCUIT BOARD 26 3 CONTROL BOARD 4 MICROPHONE BOARD ...
Страница 28: ...27 WAVEFORMS 1 VIDEO IC100 S5L5008 85Pin DAC0 IC100 S5L5008 86Pin DAC1_PB ...
Страница 29: ...WAVEFORMS 28 IC100 S5L5008 87Pin DAC2_Y IC100 S5L5008 90Pin DAC3_C ...
Страница 30: ...WAVEFORMS 29 IC100 S5L5008 91Pin DAC4_CVBS 2 AUDIO C100 S5L5008 95Pin FR ...
Страница 31: ...WAVEFORMS 30 IC100 S5L5008 96Pin FL IC100 S5L5008 108Pin SPDIF_R ...
Страница 32: ...WAVEFORMS 31 3 SYSTEM WAVEFORMS CON1_4P IR CON1_6P DAIO ...
Страница 33: ...WAVEFORMS 32 CON1_7P CLK CON1_8P STB ...
Страница 34: ...WAVEFORMS 33 CON2_17P RF NSYS_RESET_3 3V ...
Страница 35: ...WAVEFORMS 34 SDRAM CLK Crystal 4MHz ...
Страница 36: ...WAVEFORMS 35 Crystal 27MHz IC1 7Pin 6Pin_open_close ...
Страница 42: ...41 INSTRUMENT DISASSEMBLY Make sure that all leads wiring are routed correctly when reassembling ...