Service manual

DV-L70S
DV-L70BL
DV-L70W
50
9-26. IC3601 TK11835
1.Power amplification Tr base drive
2.Electric current limitation
3.Output voltage feedback
4.Reference voltage
5.GND
6.Input
1
2
3
6
5
4
BASE
Is
V FB
V CC
GND
V REF
Thermal S.D
+- -+
V REF
9-27. IC6002 TDA7053
Pin No. Terminal name Operation function Pin No. Terminal name Operation function
1 SGND1 Signal ground1 9 OUT2A Output2 (Positive)
2 IN1 Input1 10 GND2 Power ground2
3 n.c. Not connected 11 n.c. Not connected
4 n.c. Not connected 12 OUT2B Output2 (Negative)
5 Vp Supply voltage 13 OUT1B CH2 gain fixed input terminal
6 IN2 Input2 14 GND1 CH3 gain adjustment input terminal
7 SGND2 Signal ground2 15 n.c. Not connected
8 n.c. Not connected 16 OUT1A VCC
• Block Diagram
+
16(+)
OUT1
A
13(-)
14
5
OUT1B GND1 Vp
2 1
1
IN1
SGND1
+
12(-)
OUT2B
9(+)
10
OUT2
A
GND2
l-i l-i l+i l+i
6 7
2
IN2
SGND2
3 n.c.
4 n.c.
8 n.c.
11 n.c.
15 n.c.
TDA7053