20.1.1. Firmwa
rea
nd
Key
Download
20 Basic
Troubleshooting
Guide
20.1. Basic
TroubleshootingGuide
forDVD
Module
e) Check SDRAM addresand data bus, CLK and
IC
8051
other control sign
als waveform
c) Check reset sig
nal and power v
oltag
e rise time
IC
8601
d) Check Flash RO
M address and data bus
IC
8651
1) Firmware downloading
fails
a) Check supply
vo
ltages on I
Cs pins
IC
8111, IC
8651, IC
8001, IC
8051, IC
8151
2) CPPM/CPRM k
ey
download fails
b) Ch
eck O
scillation frequency and lev
el
X8621 , C8621 , C
8622 , R8621 , R
8622
Problems
Ch
ecking Po
ints
Ch
ecking components
f) Check
EEPROM CLK & dat
a lin
e
IC8611
*Compare the above w
ith OK condition
Module
*Check f
or solder short and/or
component missing/damaged
93
SA-HT640W
PL
Summary of Contents for SA-HT640WPL
Page 4: ...23 2 Packaging 109 24 Replacement Parts List 110 24 1 Component Parts List 111 4 SA HT640WPL ...
Page 10: ...10 SA HT640WPL ...
Page 16: ...16 SA HT640WPL ...
Page 19: ...8 2 Detail Block Diagram Receiver module 19 SA HT640WPL ...
Page 31: ...31 SA HT640WPL ...
Page 37: ...10 1 Disassembly Flow Chart 37 SA HT640WPL ...
Page 38: ...10 2 Main Components and P C B Locations 38 SA HT640WPL ...
Page 46: ...Step 3 Push tray assembly to the direction of arrow shown 46 SA HT640WPL ...
Page 53: ...14 2 Main P C B 53 SA HT640WPL ...
Page 60: ...SA HT640WPL 60 ...
Page 68: ...SA HT640WPL 68 ...
Page 70: ...70 SA HT640WPL ...
Page 80: ...SA HT640WPL 80 ...
Page 86: ...SA HT640WPL 86 ...
Page 88: ...SA HT640WPL 88 ...
Page 97: ...97 SA HT640WPL ...
Page 104: ...21 3 4 2 Receiver Module P C B 104 SA HT640WPL ...
Page 106: ...23 Explode Views 23 1 Cabinet Parts Location 106 SA HT640WPL ...
Page 107: ...107 SA HT640WPL ...
Page 108: ...108 SA HT640WPL ...
Page 109: ...23 2 Packaging 109 SA HT640WPL ...