Pioneer XW-HTP550 Service Manual page 43

5
7.2 IC
QQ
3 7 63 1515 0
• The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
List of IC
NJM2374AM, LA4663
NJM2374AM (TX ASSY : IC8051)
• DC/DC Converter
Pin Layout
TE
L 13942296513
Block Diagram
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5
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6
1
2
3
4
NJM2374AM
C 1
S
1.5A
160Ω
E 2
S
MAX. ON
DUTY
9:1
OSC Section
C 3
T
Vref
1.25V
± 2%
GND 4
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7
2 9
8
8 1.C
S
2.E
S
7
3.C
T
4.GND
6
5
Q Q
3 6 7 1 3 1 5
Q S
PW M
LOGIC
R
Vth=300mV
Ipk Sense
PWM COMP
ERR.AMP
co
.
XW-HTP550
7
8
9 4 2 8
+
5.IN
+
6.V
7.S
I
8.C
D
0 5 8 2 9 9 4 2 8
8 C
D
7 S
I
+
6 V
+
5 IN
m
9 9
A
B
C
9 9
D
E
F
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