JBL DVD280, Service Manual

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5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Code
6
Rev Date
REV Revision History
4
Sep 20, 2003 1.5
1. frontpanel:3CB5 104-->103,3R10 3R11 3R12 100K-->10K,3CB8 104-->105
2. change some VCC net on server circuit.
3. change the IR IN/OUT circuit.
4. VFD driver PT6311 NO.51 PIN no connect to GND,it will cause VFD flicker anomaly,correct it.
7 Oct 15, 2003 1.6
1. delete R505,R508
2. modify the -24V circuit,it can supply -24V/-27V by optional.
3. add D14 for 1.8V supply circiut.
4. modify the SPDIF output level to 500mV,improve the jitter.
8 Oct 27, 2003 1.7
1. DAC be change to software mode.
5. change L3 from 0.68uH-->0.39uH, C22 51p-->22p
2. increase the area for U701&U8 to emit heat.
3. add L16-L24 Ferrite Beat for EMI issue.
4. change the polarity of C4,C5,C8,C13
1.8 Nov 2, 2003 9
1. add a control singal from MCU:CF745-04/P to mute circuit for power on plop issue.
2. remove the STANDBY LED control singal from MCU NO.9 pin to NO.7 pin on frontpanel.
5. add R508 0603-0R in 27MHz OSC OUT.
6. change MCU 16C56A to CF745-04/P on frontpanel.
10 Nov 21, 2003 1.9
1. delete Zener diodes D1 D2 D3 D4 D5 D6 D20 D21 D22 D23 D24 D25
2. delete the EMI FB L16--L24
3. change C1 from 100uF to 330uF
4. Delete R7 R47 R48 R49 3R27 R508
ǃ ǃ ǃ ǃ ǃ
5. Add C40 330UF-10V C47 104
˖ ˖
6. Add L6 0.68uH C41 51P
˖ ˖
7. Change 3R3 from 100R to 150R
11 Dec 28, 2003 2.0
1. add the circuit on page NO.9 for macrovision
2. page4 has some error,updata it: delete FB12,FB13,FB15(-5V), change U9 to U1, FB15 to L15, FB14 to L14
3. add R49 on V-COMP output
JBL
1297C-1 2.3
DVD280 REVISION HISTORY
A4
14 15 Wednesday, February 16, 2005
Title
Size Document Number Rev
Date: Sheet of
DVD280
51