Phonic MAX-1500, MAX-2500, MAX-860 Schematic
RIGHT SIDE POWER AMP SCHEMATIC
MAIN BOARD PCB
+100V
+100V
D320
1N4935
R380
C328
33K 1/2W
390pF/100V
C329
C330
1N4935
D307
R314
100
51
R377
200pF/160V
p
100N/160V
51
R379 1K
R378
51
R330
D
D321
C317
47uF/160V
p
100
R313
1K
R312
+55V
C327
+55V
V+ SW R
R375
270K
R376
Q314
2N5401
Q310
G
S
FR602
C316
470pF/300V
100N/100V
p
D317
D316
FR602
FR602
D319
p
10K
IRFP250
Q302
ZD307
1N4935
Q309
JE350
15V 1/2W
18K
R374
p
D308
R372
27K 1/2W
Q317
2SC4793
R315
4.7 1/2W
10
2SC5200
R336
Q316
10
2SC5200
R335
Q315
2SC5200
10
R334
R328
2.2K
2K2
R329
D306
C315
1N4148
10N 100V
Q308
1N
C309
LD_P R
LD_P1 R
D315
1N5404
C326
100uF/16V
30K
R373
6.8V
C325
ZD305
0.001uF
1N4004
R371
4.7K
R343
R342
R341
D205
1N4004
3K
R327
6.8V
ZD304
BC550
1K
R316
Q303
JE802
SP_OUT R
D314
1N5404
Q333
C321
C320
100pF
100pF
Q321
MJE340
R370
C318
5W 0.22
5W 0.22
5W 0.22
R340
p
R326
C310
1K
R317
D309
1N4935
6.8K
R369
33K 1/2W
p
0.0056uF
R349
R347
100 1/2W
100 1/2W
p
24K
24K
R325
ZD303
220
SVR301
10uF/50V
33K
R368
ZD306
10V 1/2W
R350
5W 0.22
5W 0.22
R348
5W 0.22
6.8V
10
R356
10
R355
10
R354
3K
R324
R323
2.2K
D304
1N4004
Q307
BC560
-55V
C324
-55V
100N/100V
D311
D312
FR602
FR602
C322
3pF
2N5401
10K
R367
C319
100uF/16V
R322
C314
10N 100V
330
R366
1N4935
Q324
2SA1943
D310
2SA1943
Q323
Q328
G
IRFP250
D
Q322
2SA1943
D322
FR602
Q306
2K2
C313
2SA1837
D303
1N4148
R318
4.7 1/2W
Q305
JE340
-100V
p
-100V
10K
R365
p
Q332
51
R364
2N5401
C323
100N/160V
51
R360
S
+15V
AGND
-15V
AGND
AGND
OP_OUT/R
PRE_AMP/R
JP2
1 2
3 4
5 6
7 8
9 10
11 12
13 14
HEADER 7X2
100
R321
470pF/300V
100
R320
1K
R319
+15V
AGND
-15V
C312
47uF/160V
p
PITCH 2.54
AGND
AGND
AGND
AGND
Q301
2N5551
10K
R308
-15V
-15V
47N
C302
C301
+15V
10uF/50V
1N
C307
R304
47N
C304
-15V
C303
10uF/50V
PHONIC CORPORATION
Q304
D301
1N4148
R305
3.9K
ZD302
7V5
IC301A
MC34081
-15V
1K
ZD301
4
7V5
2
1K
R303
68K
R309
6
+15V
7
3
75K
R302
C306
33pF
68K
R310
R306
3.9K
10
R307
C305
R301
10uF/25V NP
4K99 1%
PRE_AMP/R
MAX860 / 1500 / 2500 SERVICE MANUAL
2N5401
D302
OP_OUT/R
OP_OUT/R
10K
R311
1N4148
+15V
MAX2500 USE 75K
MAX1500 USE 33K 0.5W
MAX860 USE 15K 0.5W
MAX1500 USE 33K 0.5W
MAX860 USE 15K 0.5W +15V
NOTE:
R302:
R369:MAX2500 USE 33K 0.5W
R380:MAX2500 USE 33K 0.5W
p
20 2W
C331 0.1uF
R381
MAX1500 NO USE
MAX860 NO USE
MAX860 NO USE
MAX860 USE 1N5404
MAX1500 USE 56K
MAX860 USE 51K
MAX1500 USE 2.7K
MAX860 USE 6.2K
MAX1500 USE 3K
MAX860 USE 3K
MAX1500 USE 27K
MAX860 USE 24K
MAX1500 USE 27K
MAX860 USE 24K
MAX1500 USE 2.7K
MAX860 USE 5.6K
MAX2500 USE 24KR325:
R323: MAX2500 USE 3K
R324: MAX2500 USE 2.2K
R326: MAX2500 USE 24K
MAX1500 USE 8.2K
MAX860 USE 8.2K
MAX1500 USE 6.8V
MAX860 USE JUMP
R328: MAX2500 USE 2.2K
R370: MAX2500 USE 6.8K
ZD305: MAX2500 USE 6.8V
Q317/Q323: MAX1500 NO USE
R336/R343/R350/R356:
D321/D322: MAX1500 USE 1N5404
D312/D317: MAX860/1500 NO USE
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