JVC UX-P55 Service Manual

1-30 (No.22036)
4.7 LA6541-X (IC801) : BTL driver
• Pin layout & Block diagram
• Pin function
24 23
22
21
20
19
Gnd
18
17 16
15
14
13
789101112
Gnd
1
2
3456
Level
shift
B T L
driver
Level
shift
B T L
driver
B T L
driver
11k
ohm
11k
ohm
Level
shift
B T L
driver
Level
shift
Regulator
RESET
11k
ohm
11k
ohm
- +
- +
Vcc
Vcc Vref Vin4 Vg4 Vo8 Vo7
Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg
out
Reg
In
Vo6 Vo5 Vg3 Vin3 Cd Res
Pin No. Symbol Description
1 Vcc Power supply (Shorted to pin 24)
2 Mute All BTL amplifier outputs ON/OFF
3 Vin1 BTL AMP 1 input pin
4 Vg1 BTL AMP 1 input pin (For gain adjustment)
5 Vo1 BTL AMP 1 input pin (Non inverting side)
6 Vo2 BTL AMP 1 input pin (Inverting side)
7 Vo3 BTL AMP 2 input pin (Inverting side)
8 Vo4 BTL AMP 2 input pin (Non inverting side)
9 Vg2 BTL AMP 2 input pin (For gain adjustment)
10 Vin2 BTL AMP 2 input pin
11 Reg Out External transistor collector (PNP) connection. 5V power supply output
12 Reg In External transistor (PNP) base connection
13 Res
Reset output
14 Cd Reset output delay time setting (Capacitor connected externally)
15 Vin3 BTL AMP 3 input pin
16 Vg3 BTL AMP 3 input pin (For gain adjustment)
17 Vo5 BTL AMP 3 output pin (Non inverting side)
18 Vo6 BTL AMP 3 output pin (Inverting side)
19 Vo7 BTL AMP 4 output pin (Inverting side)
20 Vo8 BTL AMP 4 output pin (Non inverting side)
21 Vg4 BTL AMP 4 output pin (For gain adjustment)
22 Vin4 BTL AMP 4 output pin
23 Vref Level shift circuit's reference voltage application
24 Vcc Power supply (Shorted to pin 1)

JVC UX-P55 Specifications

General

Brand	JVC
Model	UX-P55
Category	Stereo System
Language	English