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+100V +100V R314 100 D307 R379 R330 51 R378 51 C328 390pF/100V D320 1N4935 V+ SW R R376 10K p Q309 2SC4793 Q316 2SC5200 p p ZD307 15V 1/2W R372 27K 1/2W R328 2.2K R327 3K D315 1N5404 R373 30K Q321 MJE340 C318 0.0056uF R370 6.8K SP_OUT R R325 24K SVR301 220 p p R349 5W 0.22 R350 5W 0.22 ZD306 10V 1/2W C320 100pF R368 33K R354 10 R355 10 R356 10 R367 10K C319 100uF/16V Q322 2SA1943 Q323 2SA1943 Q324 2SA1943 R369 33K 1/2W ZD303 6.8V R348 5W 0.22 R347 100 1/2W C326 100uF/16V D205 1N4004 R371 4.7K R341 5W 0.22 R342 5W 0.22 R343 5W 0.22 p ZD305 6.8V D308 1N4004 C325 0.001uF R334 10 R335 10 R336 10 Q315 2SC5200 Q317 2SC5200 R374 18K D316 FR602 C327 100N/100V D319 1N4935 +55V +55V D317 FR602 R375 270K p 200pF/160V D G S Q310 IRFP250 Q314 2N5401 1K C329 R380 33K 1/2W 1N4935 C330 100N/160V C317 47uF/160V p D321 FR602 R308 10K Q301 2N5551 Q302 JE350 R315 4.7 1/2W R329 2K2 D301 1N4148 Q308 R316 1K BC550 C309 1N D306 1N4148 C315 10N 100V C316 470pF/300V R377 51

+15V R312 1K R313 100

C301 10uF/50V

C302 47N

-15V

-15V

C303 10uF/50V

-15V

C304 47N

RIGHT SIDE POWER AMP SCHEMATIC

PHONIC CORPORATION
Q303 JE802 ZD304 6.8V LD_P1 R LD_P R R309 68K C310 10uF/50V R326 24K R317 1K R340 100 1/2W D309 1N4935 D304 1N4004 Q307 BC560 R324 2.2K R323 D302 1N4148 R322 Q305 2K2 Q304 2N5401 JE340 R318 4.7 1/2W D303 1N4148 C313 470pF/300V S R360 51 R321 100 p C312 47uF/160V JP2 +15V AGND -15V AGND AGND AGND AGND 1 3 5 7 9 11 13 2 4 6 8 10 12 14 HEADER 7X2 PITCH 2.54 +15V AGND -15V AGND AGND PRE_AMP/R OP_OUT/R p D322 FR602 R320 100 Q328 IRFP250 D G Q306 2SA1837 D310 1N4935 R366 330 R364 51 Q332 2N5401 R365 10K -100V C323 100N/160V p -100V R311 10K C314 10N 100V 3K R310 68K R306 3.9K D314 1N5404 C321 100pF Q333 2N5401 C322 3pF D312 FR602 -55V D311 FR602 -55V C324 100N/100V p R319 1K

R304 1K

C307 1N

ZD301

ZD302

7V5

7V5

R305 3.9K

-15V

R303 1K

4

IC301A MC34081

2

6

3

7

+15V

C306 33pF

R302 75K

R301 4K99 1%

PRE_AMP/R

R307 10

C305 10uF/25V NP

OP_OUT/R

OP_OUT/R

NOTE:

+15V

+15V

C331

0.1uF

MAX860 / 1500 / 2500 SERVICE MANUAL

R369:MAX2500 USE 33K 0.5W MAX1500 USE 33K 0.5W MAX860 USE 15K 0.5W R380:MAX2500 USE 33K 0.5W MAX1500 USE 33K 0.5W MAX860 USE 15K 0.5W R302: MAX2500 USE 75K MAX1500 USE 56K MAX860 USE 51K R323: MAX2500 USE 3K MAX1500 USE 2.7K MAX860 USE 6.2K R324: MAX2500 USE 2.2K MAX1500 USE 3K MAX860 USE 3K R325: MAX2500 USE 24K MAX1500 USE 27K MAX860 USE 24K R326: MAX2500 USE 24K MAX1500 USE 27K MAX860 USE 24K R328: MAX2500 USE 2.2K MAX1500 USE 2.7K MAX860 USE 5.6K R370: MAX2500 USE 6.8K MAX1500 USE 8.2K MAX860 USE 8.2K ZD305: MAX2500 USE 6.8V MAX1500 USE 6.8V MAX860 USE JUMP Q317/Q323: MAX1500 NO USE MAX860 NO USE R336/R343/R350/R356:

R381

20 2W

D321/D322:

MAIN BOARD PCB

Page8

D312/D317:

MAX1500 NO USE MAX860 NO USE MAX1500 USE 1N5404 MAX860 USE 1N5404 MAX860/1500 NO USE