Marantz PM7000N, Service Manual

Page: 31 / 64

NJU72750A (MAIN : IC701, IC707)
Pin Function
No. Symbol Function No. Symbol Function
1 V+ positive power supply terminal 17 DATA IC control data input
2 InA1 Ach input1 18 CLOCK IC control clock input
3 InB1 Bch input1 19 NC -
4 InA2 Ach input2 20 NC -
5 InB2 Bch input2 21 OutB3 Bch output3
6 InA3 Ach input3 22 OutA3 Ach output3
7 InB3 Bch input3 23 REF_B Bch reference potential terminal
8 InA4 Ach input4 24 OutB2 Bch output2
9 InB4 Bch input4 25 OutA2 Ach output2
10 InA5 Ach input5 26 REF_A Ach reference potential terminal
11 InB5 Bch input5 27 OutB1 Bch output1
12 InA6 Ach input6 28 OutA1 Ach output1
13 InB6 Bch input6 29 NC -
14 InA7 Ach input7 30 ADR0 Address selection pin 0
15 InB7 Bch input7 31 ADR1 Address selection pin 1
16 REF Reference potential terminal for BIAS 32 V- negative power supply terminal
NJU72322 (MAIN : IC702)
Pin Function
No. Symbol Function No. Symbol Function
1 NC - 17 NC -
2 L_CAP Lch Vol control switching noise removal capacitor 18 DATA IC control data input
3 OUTL Lch output 19 CLOCK IC control clock input
4 L- Lch OP AMP inverting input 20 LATCH IC Control latch input
5 L_REF Lch reference potential terminal 21 D_V+ + Power supply [Digital control]
6 L+ Lch OP AMP non-inverting input 22 INR Rch input
7 L_REF Lch reference potential terminal 23 AR_V+ + Power supply [Rch]
8 L_REF Lch reference potential terminal 24 AL_V+ + Power supply [Lch]
9 R_REF Rch reference potential terminal 25 AR_V- - Power supply [Rch]
10 R_REF Rch reference potential terminal 26 AL_V- - Power supply [Lch]
11 R+ Rch OP AMP non-inverting input 27 INL Lch input
12 R_REF Rch reference potential terminal 28 D_V- - Power supply [Digital control]
13 R- Rch OP AMP inverting input 29 D_CAP Digital part stabilization capacitor
14 OUTR Rch output 30 ADR0 Address selection pin
15 R_CAP Rch Vol control switching noise removal capacitor 31 NC -
16 D_IN Digital supply voltage terminal 32 D_REF Reference terminal for control
1 16
17
32
1 16
17 32
SSC3S121 (SMPS : IC1800)
BLOCK DIAGRAM
Pin Function
No. Symbol Function No. Symbol Function
1 FB/OLP
Constant voltage control signal input /Overload
protection signal input
5 DRV Gate drive output
2 BR AC voltage detection terminal 6 OCP
Current mode control signal input /Overcurrent
detection signal input
3 ― Non 7 VCC
Control circuit power input /Overvoltage
protection signal input
4 ST Start-up current input 8 GND Ground
1
5
6
7
8
4
3
2
FB/OLP
BR
ST DRV
VCC
GND
OCP
UVLO OVP TSD REG
Brown-in/out,
HVP
PWM OSC
OLP Feedback
control
Slope
compensation
LEB
Drain peak current
compensation
OCP
Startup
DRV
VREG
VREG VCC
VCC
BR
FB/OLP
ST
OCP
GND
4
6
8
1
2
7
S
R Q
DRV
5
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
31