JVC SP-DW103, Руководство по обслуживанию

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1-14 (No.22056)
6.7 STR-F6676 (IC951) : Switching regulator
• Pin Layout • Block Diagram
6.8 TC74HC00AF-W (IC503) : Quad 2-input NAND gate
• Pin layout & Block diagram
6.9 TC74HC14AF-X (IC504, IC571) : Hex Schmitt inverter
• Pin layout & Block diagram
1 2 3 4 5
VIN
4
START
REG.
T.S.D
O.V.P LATCH
O.S.C
DRIVE
Vth(1)
Comp.1
Vth(2)
Comp.2
GND 5
O.C.P./F.B
1
S
2
D 3
R4
R3
R1 C1
Iconst
R2
Rconst-
14 13 12 11 10 9 8
7
6
5 4 3
2
1
1A 1B 1Y 2A 2B 2Y GND
Vcc 4B 4A 4Y 3B 3A 3Y
14 13 12 11 10 9 8
7
6
5 4 3
2
1
1A 1Y 2A 2Y 3A 3Y GND
Vcc 6A 6Y 5A 5Y 4A 4Y