Philips DVDR615 Service Manual page 159

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Circuit-, IC descriptions and list of abbreviations
IC7409 BA5995: FEBE Board, 4-channel BTL driver
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28 27 26
PreV
CC
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1 2
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Pin name
Pin No.
1 BIAS IN
Input for bias-amplifier
2 OPIN1 (+)
Non inverting input for CH1 OP-AMP
3 OPIN1 (−)
Inverting input for CH1 OP-AMP
4 OPOUT1
Output for CH1 OP-AMP
IN2
5
Input for CH2
6 MUTE
Input for CH1 mute control
7 STBY2
Input for CH2 stand by control
8 GND
Substrate ground
9 PowV 1
V
CC CC
10 PowV 2
V
CC CC
11 V (−)
Inverted output of CH2
O2
12 V (+)
Non inverted output of CH2
O2
13 V (−)
Inverted output of CH1
O1
14 V (+)
Non inverted output of CH1
O1
Note) Symbol of + and − (output of drivers) means polarity to input pin.
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25 24 23
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−
+
+
−
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MUTE STBY
ch1 ch2
3 4 5 6
Function
for CH1 power block
for CH2 power block
22 21 20
STAND BY
ch1 / 3 / 4
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−
+
+
−
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PowV
CC
(ch1)
7 8 9
Pin No.
Pin name
15 V
O4
16 V
O4
17 V
O3
18 V
O3
19 PowV
20 STBY1
21 GND
22 OPOUT3
23 OPIN3 (−)
24 OPIN3 (+)
25 OPOUT4
26 OPIN4 (−)
27 OPIN4 (+)
28 PreV
Figure 9-31
DVDR615/69
19 18 17 16
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ch3 ch4
PowV
CC
(ch3 / 4)
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LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
LEVEL
SHIFT
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PowV
CC
(ch2)
ch2 ch1
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10 11 12 13
Function
(+) Non inverted output of CH4
(−) Inverted output of CH4
(+) Non inverted output of CH3
(−) Inverted output of CH3
V for CH3/4 power block
3
CC
CC
Input for CH1/3/4 stand by control
Substrate ground
Output for CH3 OP-AMP
Inverting input for CH3 OP-AMP
Non inverting input for CH3 OP-AMP
Output for CH4 OP-AMP
Inverting input for CH4 OP-AMP
Non inverting input for CH4 OP-AMP
V for pre block
CC
CC
9. EN 159
15
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14
Resistor unit : [Ω]