Denon UD-M31 Service Manual page 18

LA6559(IC801)
REV 1
Signal System VCC S
S-VCC 2
Input Input
Power Supply Power Supply
(For (Forward/Reverse/ rd/Reverse/
(LOADING) (LOADING)
VCC2 3
Break/OFF)
VLO- 4
VLO+ 5
VO4+ 6
VO4- 7
VO3+ 8
VO3- 9
Power Power
System System
GND
FR FR
VO2+ 10
(External PNP)
VO2- 11
VO1+ 12
VO1- 13
VCC1 14
Power Supply
(CH1 to CH4)
VIN1 15
VIN1- 16
33k
11k 11k
VIN1+ 17
VIN2 18
T Thermal
Shutdown Sh
36 FWD
Signal System GND
35 S-GND
CH2 to CH4
34 MUTE2
MUTE2
Output t
CH1 Output
33 MUTE1
MUTE1
ON/OFF
32 VIN4
33k
31 VIN4-
11k 11k
30 VIN4+
29 VREF-IN
28 VCONT(LOADING)
Power System GND
FR FR
PNP Tr
Collector
27 REG-OUT
3.3VREG
PNP Tr PNP Tr
)
Base Base
26 REG-IN
33k
25 VIN3+
11k
24 VIN3-
23 VIN3
3.3VREG GND
22 GND-VREG
3.3VREG
Power Supply u
21 VCC-VREG
33k
20 VIN2+
11k
19 VIN2-
Pin
Name
No.
5CH output change terminal, logic input of
1 REV
loading block
signal system power supply
2 S-Vcc
(BTL-AMP:CH1~4)
3 Vcc2 Power supply for loading block
4 VLO- Loading output (-)
5 VL0+ Loading output (+)
6 VO4+ Output terminal (+) for channel 4
7 VO4- Output terminal ( ) for channel 4
8 VO3+ Output terminal (+) for channel 3
9 VO3- Output terminal (- ) for channel 3
10 VO2+ Output terminal (+) for channel 2
11 VO2- Output terminal (- ) for channel 2
12 VO1+ Output terminal (+) for channel 1
13 VO1- Output terminal (- ) for channel 1
14 Vcc1 CH1 `CH4(BTL-AMP) output stage power supply
15 VIN1 Input terminal for channel 1
16 VIN1- OP-AMP input AMP-A input terminal (- )
17 VIN1+ OP-AMP input AMP-A input terminal (+)
18 VIN2 Input terminal for channel 2, input AMP output
19 VIN2- Input terminal (- ) for channel 2
20 VIN2+ Input terminal (+) for channel 2
21 Vcc-VREG 3.3VREG power supply
22 GND-VREG 3.3VREG GND
23 VIN3 Input terminal for channel 3, input AMP output
24 VIN3- Input terminal (- ) for channel 3
25 VIN3+ Input terminal (+) for channel 3
26 REG-IN PNP transistor base connected
3.3V power output to which the PNP transistor
27 REG-OUT
collector connected
28 VCONT Loading output voltage set terminal
29 VREF-IN Reference voltage applied terminal
30 VIN4+ Input terminal (+) for channel 4
31 VIN4- Input terminal (- ) for channel 4
32 VIN4 Input terminal for channel 4, input AMP output
33 MUTE1 Output ON/OFF for channel 1 (BTL AMP)
34 MUTE2 Output ON/OFF for channel 2 to 4 (BTL AMP)
35 S-GND Signal system GND
Output change terminal (FWD) for loading
36 FWD
output (VLO+,-), logic input of loading block
18
UD-M31
Function
-
)
18