Read Harman Kardon HD 980 Service Manual online
5
5
4
4
3
3
2
2
1
1
E
E
D
D
C
C
B
B
A
A
History
REV 1.0:
1.Make Pin1 of Y1 hang up.
2.Add R185 and C116, and both be valued "NA".
4.Delete net "MISO".
6.Connected Pin6 of T1 to "singal" net,and Connected Pin4 of T1 to "GND" net.
7.Delete U17A(74LCX125) and replace it with U15C(74LCX125).
5.Renamed net "CS_75710" as "CS_75711".
8.Some Part Reference of components was changed, such as Capacitor, Electrolytic Capacitor, IC, connectors, MOSFET etc.
9.Deleted C49, and made pin4/pin5/pin6 of JP1 hung up.
REV 1.1:
1.Add R186,R187;
2.Connected PIN38 and PIN69 of U6;
2.Connected PIN38 and PIN69 of U6;
3.Add net mame "ATA_CS1#"、"ATA_CS0#"、"ATA_RDY"、"ATA_RST#"、"D[0..15]" and
"A[1..19]"、"VFD_STB"、"DATA/SDA"、"CLOCK/SCL"、"IR".
"A[1..19]"、"VFD_STB"、"DATA/SDA"、"CLOCK/SCL"、"IR".
3.Change Q3,Q4,Q5,Q6 into TO-92 Footprint;
4.Add TR1;
5.Change R56,R88 from 22K to 2.2K.
5.Change R56,R88 from 22K to 2.2K.
6.Change JP5.
REV 1.2:
1.remove U15, U18, U19, U21, U22, U25;
2.R98, R99, R100, R101, R102, R128, R133, R136, R144, R132, R135, R143, R146, R126, R106, R127, R131, R134;
3.remove C95, C99, C100, C101;
3.remove C95, C99, C100, C101;
4.connect MCLK_8740 to the oscillator at R129;
5.delete Isolation Transformer.
5.delete Isolation Transformer.
6.remove RJ45 connector.
7.Replace U15C with 74HCT14D.
8.Add C118, C119, C120, C121, C122, C123, and all Valued "NA".
8.Add C118, C119, C120, C121, C122, C123, and all Valued "NA".
9.Deleted C96, C97, C98, CE35, U24, and connected net "+3.3V" to L3.
1.Add C124~C154;
2.Add D15
REV 1.3:
HD980
HD980 History
Harman Kardon
A3
1
9
Friday, September 19, 2008
Title
Size
Document Number
Rev
Date:
Sheet
of
drawn by
ABC PCB S鄏l
Ch. du Saux 17
CH-1131 Tolochenaz
harman/kardon
HD 980/230 Service Manual
Page 36 of 46
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