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DC - DC CONVERTER SCHEMATIC DIAGRAM - SCHEMA CONVERTISSEUR DC -DC -SCHALTBILD GLEICHSTROMUMFORMER - SCHEMA CONVERTITORE CC - CC
ESQUEMA CONVERTIDOR CC - CC
( DC/DC 20" BI )
+19V
R702
10K
C710
R703
4700P
10K
50V
R704
C714
R706
20K
470P
10K
50V
(NPD)
1
2
3
4
5
6
7
IC701
TL1451AC
16
15
14
13
12
11
10
C713
R707
4700p
20k
50V
R705
10k
R708
R709
10k
47k
BD701
(Bead)
+15V
C701
220µ
BD702
25V
(Bead)
PWR_GND
CN701=>CN502
CN701<=CN502
BD501
(Bead)
2
4
BD502
(Bead)
3
1
LCD03B
First issue 10 / 03
F702
T 2A
Q703
69.420D1.111
2N3904
F701
T 3A
R715
1,8K
R717
69.43001.101
C702
220µ
UREF
25V
R738
(el)
3K
Q704
2N3905
C715
1µ
16V
ZD702
ZD702
2MM 5,1V
R714
2MM 6,1V
8
R713
47K
C709
Q705
1µ
2N3904
25V
UREF
R719
1.8K
C716
R721
1µ
9
0
16V
R739
3K
Q706
2N3904
R710
0
12V
ZD704
+12V
ZD703
12V
CN703
+5VS
8
R740
20K
PWR_GND
7
6
R741
LCD_BR
5
C717
3K
220µ
ON/OFF
4
25V
3
Q713
2N3904
+19V
2
1
+19V
1
2
C501
470µ
3
25V
(ELI)
NOTES:
1. Resistor values are in ohm, K = 1,000 ohm, M = 1,1000 000 ohm
2. All resistors are SMD 0603 5% exept where otherwise indicated
3. All capacitors are SMD 0603 5% exept where otherwise indicated
GND
4.
Q701
IRFR5305
L701
150µ
C705
220µ
R723
25V
3 01K
(EL)
D701
D703
C718
RB060L-4D
RB060L-4D
0.1µ
25V
R724
1K
+5VS
Q702
IRFR5305
L702
47µ
C706
R726
220µ
8,66K
25V
(el)
D704
D702
C719
RB060L-4D
RB060L-4D
0.1µ
25V
R727
1K
Q712
CN702
2N3906
LCD_ON
ON/OFF
1
2
+12V
3
4
5
6
LCD_ON
+5VS
7
8
VCC
9
10
R742
47K
11
12
+19V
14
13
PWR_ON
15
17
(Bead)
L502
MUTE
18
19
R743
L503
20K
AUDIO_L
20
21
(Bead)
C564
0,1µ
0,1µ
25V
25V
Represents PCB common ground
Q707
FO59435
R729
47K
C707
0,1µ
25V
R725
Q708
R731
330
2N3904
47K
R730
C704
20K
47µ
16V
+12V
Q709
C708
2N3906
0,1µ
UREF
25V
R728
R732
2K
20K
R733
R734
3K
47K
Q710
Q710
2N3904
2N3904
R737
20K
LCD_BR
PWR_GND
S_GND
AUDIO_R
L501
(Bead)
C562
0,1µ
25V
+5VS
VCC
POWER_ON
R735
47K
R736
20K
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