-60-
TROUBLESHOOTING GUIDE
Appendix
4. CH DON’T MEMORY or SKIP
(g)
33V
5V
Check 5V/33V LINE
U101
Check Composite Video Signal
TUNER
CVBS
T-DATA
T-CLOCK
Check T-SDA/SCL
#27
#28
#61
#29
SDA
#4
#30
SCL
#3
#10 #11 #12
SDA
X701
32.768KHz
ST-BY 5V
SCL
Check the crystal
#5
#6
Check SDA/SCL
#8
ST-BY 5V
Check the input signal conditions
I701
NG : Loss of signal or weak signal
OK : Go to the figure (g)
MICOM
I501
VDP
I703 EEPROM
Summary of Contents for DTQ-20U4SC
Page 7: ...6 CIRCUIT BLOCK DIAGRAM...
Page 14: ...13 SCHEMATIC DIAGRAM 20U4 SHEET 1...
Page 15: ...14 SCHEMATIC DIAGRAM 20U4 SHEET 2...
Page 16: ...15 SCHEMATIC DIAGRAM 27U4 SHEET 1...
Page 17: ...16 SCHEMATIC DIAGRAM 27U4 SHEET 2...
Page 46: ...45 PRINTED CIRCUIT BOARD CN 230F MAIN...
Page 47: ...46 PRINTED CIRCUIT BOARD CN 230F 20U4 CRT...
Page 48: ...47 PRINTED CIRCUIT BOARD CN 230F 27U4 CRT...
Page 57: ...56 WAVEFORMS Appendix 17 SVM Q909 BASE 18 I901 PIN7 ROUT...
Page 64: ...PRINTED DATE Mar 2003...