JBL DVD280, Service Manual

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Code
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Rev Date
REV Revision History
June 18, 2003 1.00
Initial Release
1.10 July 10, 2003 separate ground again, modify some errors, move the 3370 so that short the video&audio path ,
1.20 July 20, 2003
connect the AGND&DGND of the dac with R7,
change the footprint of C44 C45 C46 C48 C50 C51,
add R407 R408 R409 R529 R530 for VIDEO,
swap the pin1&2 of U2,
add R505 R506 R508 R431,change the value of R504
upgrade page 1,
add front panel page,
12V&-12V from SMPS to MAIN BOARD,
4
delete NET-LED to front panel,
add R433(America) or R432(Europe) to set software
dynatron BC858 was changed by 8550 in mutelogic
add BLOCK DIAGRAM page
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Aug 9, 2003 1.30
modify the schematic according to outstanding issues list Amlogic_03_08_06
debug the front panel and modify SCHEMATIC&PCB
remove the LM9022 from front panel to main board
change R431 from 10K to 2.7K,R46 from 33K to 82K,2R15 from 1K to 150
changed DAC PCM1742KE by WM8728
add +12V/-12V regulater (TO-92 type) on mainboard
change R728 R729 from 0603 type to 0805
1.40 5 Sep 1, 2003
change R829 from 22K to 3.9K,C831 from 22p to 183.it help to improve read CD ability.
JBL
1297C-1 2.3
DVD280 REVISION HISTORY
A4
13 15 Wednesday, February 16, 2005
Title
Size Document Number Rev
Date: Sheet of
DVD280
50