Icepower Amp (3/5) - Pioneer SC-LX81 Service Manual

1

10.23 ICEPOWER AMP (3/5)

A
CN4400
CKS1716
SR+ 1
SR- 2
GNDSR 3
GNDSR 4
V+12SR 5 V+12V
V-12SR 6
V-12V
B
SL+ 1
SL- 2
GNDSL 3
V+12V
V+12SL 4
V-12SL 5
V-12V
CN4300
XKP3062-A
C
SR_IN
SL_IN
Q 1/5, 2/5, 5/5
AMUTE
D
Q 1/5, 2/5, 4/5, 5/5
E
VD
V+64V
VD_CHK2
GND
VS_CHK2
F
V-64V
VS
Q 3/5
138
1
2
D4400
1SS302
V+5V
V-5V
R4400 R4402
100 0.5%
C4404 910 0.5%
ACG7069-A
1000p
C4405
ACG7069-A
R4401 R4403
1000p
GND 100 0.5% 910 0.5%
D4300
1SS302 V+5V
V-5V
R4300 R4302
100 0.5%
910 0.5%
C4304 (SL)
ACG7069-A
1000p
C4305
GND
ACG7069-A
R4301 R4303
1000p
100 0.5% 910 0.5%
V+5V
R4415
0
GND
GND
R4315
0
V-5V V-5VFILT2
GND
R4414
R4478
4.7k
NM
R4410 C4412 100u
R4413
470 C4413 100u
ACH1479-A
ACH1479-A
R4310 C4312 100u C4313 ACH1479-A NM
100u
R4313
470
ACH1479-A
(SL)
R4378
NM
R4314
NM
4.7k
GND
VD_CHK2
VS_CHK2
AMPOVERLOAD
AMPDISABLE2
Q 1/5
GND
GND
R4318
4.7k
GND
R4361
R4461
ACN7165-A
ACN7165-A
VD3
10 VD4
10
3216 3216
1u
1u
L4402 L4302
ATL7018-A
ATL7018-A
L4403
L4303
ATL7018-A
ATL7018-A
1u
1u
10 10
3216 3216
R4362
VS3 VS4
R4462
ACN7165-A
ACN7165-A
2
3
C4408
220u/25 HAT
C4409
0.01u/16 R4406
2125 0
CFHXSQ103J16-T
V-12V
GND
IC4402
(1/2)
3 UPC4570G2-A
4
SR_IN
1
8
2
R4405
1k 0.5%
C4407
470p
ACG7072-A
C4309
V+12V
CFHXSQ103J16-T
0.01u/16 R4306
2125 0
GND
C4308 220u/25 HAT
IC4402
(2/2)
5 UPC4570G2-A
SL_IN
7
6
R4305
1k 0.5%
C4307 470p
ACG7072-A
DC offset
C4420
1u/10 YB
R4420 R4422
6
8
R4418
7
220k 240k
4.7k
IC4403 4
5
(2/2)
NJM4565MD GND
C4421 R4421 MOD3
1.8k
0.1u/16
YB
GND
C4422 R4425 R4426 R4427
1k
2200p 1.5k 1.5k
1%
ACG7073-A
1% 1%
R4424
1%
27k
GND
R4372
NM
IC4400
ICC1-AVR
CS1_ch1
34 22
CS2_ch1
35 21
RECout_ch1
36 Pwm+_ch1 20
Vin__ch1 Pwm-_ch1 ZobelSense1
37 Mod_ch1 19
DC_FB_ch1 NTC_in
38 18
MODULATOR
Vin_ch2 Average1
39 17
DC_FB_ch2 Average2
40 CS1_ch2 16
RECout_ch2 CS2_ch2 ZobelSense2
41 15
Ref_ch2
Mod_Ch2
42 14
Pwm+_ch2
43 13
Pwm-_ch2
44 12
R4324
27k
1%
C4322 R4325 R4326 R4327
2200p
1k 1% 1.5k 1.5k
1%
ACG7073-A
GND
DC offset
GND
V+5V
C4447 R4460
1u/10 10 C4320
YB
1u/10
YB
R4320 R4322
2
8
1
220k 240k
IC4403
4
3
(1/2)
NJM4565MD
GND
R4360 C4347
10 1u/10
YB
GND
V-5V
C4321 R4321
MOD4
0.1u/16 1.8k
YB
GND
The ! mark found on some component parts should be replaced
with same parts(safety regulation authorized) of identical
designation.
NOTE
1. RESISTORS
Unit: k-k Ω , M-M Ω or Ω unless otherwise noted.
Rated Power: 1/16w unless otherwise noted.
Toleranee: (J)5% unless otherwise noted.
2. CAPACITORS
Unit: p-pF or u-uF unless otherwise noted.
Ratings: Capacity(F)/Voltage(V) unless otherwise noted.
YB:CKSRYB, QYB:CKSQYB,SYB:CKSYB, CH:CCSRCH
HAT:CEHAT, ZL:CEHAZL
3. NM: No Mount
SC-LX81
3
4
V+5V
R4440
10k
R4429
1/8W
OUT3_R
2125
1
R4430 47k
2125
GND
1% 1/8W D4411
NM
OUT3
R4442
0
C4423
Q4409
2SC4154(EFG)
39p C4424 56p C4429
ACG7066-A
0.1u/16
ACG7078-A
YB
GND
R4436
R4435 R4437 R4477
PWM3
3216 3216
15k 1% 27k 20k
1.8k 1%
1% 1/4W 1% 1/4W
GND GND
C4427 ACG7070-A
V-5VFILT2
4.7P
C4428
R4438
2.2u
2.7k
ACG7073-A
1%
2SA1682(4)
R4439
Q4406 Q4407
56k 1%
2SA1682(4)
MOD3
ZOBEL3
GND
ZOBEL4
MOD4
2SA1682(4)
Q4306 Q4307
R4339
2SA1682(4)
56k 1%
C4328
R4338
2.2u
2.7k
ACG7073-A
1%
C4327
4.7P
1% ACG7070-A
V-5VFILT2
R4337 R4377
R4336
R4335 20k
15k 27k
PWM4
3216 3216
1.8k 1% 1% 1/4W 1% 1/4W
1%
ACG7066-A
C4323
39p
GND GND
V+5V
OUT4
R4330
47k
2125
1% 1/8W
R4329 R4340
OUT4_L
2125
1/8W
1 10k
R4342
GND
AM Switch
Transistor R4341
Q4309
2SC4154(EFG)
15k D4311
GND
1608 SIZE 2125 SIZE
RS1/16S*** RS1/10S***
2125
RN1/16S***
RS1/8SQ***
2125
1/8W
CCSR***
CCSQ***
CKSR*** 2125
CKSQ***
4
Q 1/5, 2/5,
4/5, 5/5
OSC1
(SL)
Q 1/5, 2/5,
4/5, 5/5
0
OSC1
NM
3216 SIZE
RS1/8S***
3216
RS1/4SA***
3216
1/4W
CCS***
3216
CKS***