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Pioneer PDR-W839 Service Manual page 93

Compact disc recorder / multi-cd changer
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BA5810FP (CD-R CORE ASSY : IC451)
• 5Channel Driver IC
•
Block Diagram
28
27
LOADING PRE
FWD REV
1
2
•
Pin Function
N
. o
P
n i
N
a
m
e
1
F
W
D
Input for loading forward
Input for loading reverce
2
R
E
V
3
L
D
C
O
N
T
Output control terminal for loading
4
P
S
Control terminal for power saving mode
5
N I
1
Input of CH2
Input of CH1
6
N I
2
7
P
R
E
V
C
C
Pre and loading unit power supply input terminal
Power unit power supply input terminal
8
P
O
W
V
C
C
1
2
9
V
O
L
) - (
Inverted output of loading
Not inverted output of loading
1
0
V
O
( L
) +
1
1
V
0
2
) - (
Inverted output of CH2
Not inverted output of CH2
1
2
V
0
( 2
) +
1
3
V
0
1
) - (
Inverted output of CH1
Not inverted output of CH2
1
4
V
0
( 1
) +
26
25
24
23
22
7.5k
7.5k
16k
16k
7.5k
7.5k
POWER
PREVCC
SAVE
3
(PRE, LOADING)
3
4
5
6
7
P
n i
F
u
n
t c
o i
n
21
20
19
18
17
10k
10k
CH1~
POWVCC 34
CH4
(CH3, CH4)
MUTE
10k
16k
LEVEL
SHIFT
LEVEL
SHIFT
16k
10k
POWVCC 12
(CH1, CH2)
10k
10k
8
9
10
11
12
N
. o
P
n i
N
a
m
e
1
5
V
0
( 4
) +
Not inverted output of CH4
1
6
V
0
4
) - (
Inverted output of CH4
1
7
V
0
( 3
) +
Not inverted output of CH3
Inverted output of CH3
1
8
V
0
3
) - (
1
9
G
N
D
Substrate ground
2
0
P
O
W
V
C
C
3
4
Power unit power supply input terminal (CH3,CH4)
2
1
M
U
T
E
Input for mute control
Output of CH3 OP-AMP
2
2
O
P
O
U
T
3
2
3
O
P
N I
3
) - (
Inverting iutput of CH3 OP-AMP
Not inverting iutput of CH3 OP-AMP
2
4
O
P
N I
( 3
) +
2
5
O
P
O
U
T
4
Output of CH4 OP-AMP
2
6
O
P
N I
4
) - (
Inverting iutput of CH4 OP-AMP
2
7
O
P
N I
( 4
) +
Not inverting iutput of CH4 OP-AMP
2
8
B
A I
S
Input of Bias-amplifier
PDR-W839
16
15
10k
10k
10k
10k
10k
LEVEL
SHIFT
LEVEL
SHIFT
10k
10k
10k
10k
10k
13
14
P
n i
F
u
n
t c
o i
n
f
93
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