Yamaha KMA-1000 Service Manual page 26

A B
KMA-1000/KMA-950
MAIN (1)
1
●
Semiconductor Location
Ref. No. Location Ref. No. Location
D401 D3 IC401 E1
D402 E3 IC402 D4
D403 D3 Q401 D3
D404 D3 Q402 E3
D405 F3 Q403 D3
D406 F3 Q404 E3
D407 E2 Q405 D3
D408 G2 Q406 F3
D409 C2 Q407 D3
D410 E2 Q408 E3
D411 E2 Q409 D3
2
D412 C2 Q410 E3
D413 G2 Q411 D3
D414 E2 Q412 F3
D415 D2 Q413 D3
D416 D2 Q414 D3
D417 D2 Q415 F3
D418 C2 Q416 E3
D419 C2 Q417N E1
D420 C2 Q417P C1
D421 F2 Q420N G1
D422 F2 Q420P E1
D423 F2 Q421 C1
D424 E2 Q422 F1
D425 E2 Q423A C1
D426 E2 Q423C D1
D427 D2 Q426A F1
3
D428 D2 Q426C G1
D429 F2 Q427N D1
D430 F2 Q427P D1
D431 D2 Q430N F1
D432 D2 Q430P F1
D433 F2 Q431 C3
D434 F2 Q432 C3
D435 C3 Q433 C3
D436 C3 Q434 F3
D437 G3 Q435 G3
D438 G3
D439 C3
Point e
D440 C3
CH 1 : Emitter of Q433
D441 F5
CH 2 : Collector of Q431
D442 G4
D443 G3
4
D444 G4
D445 D2
D446 F2
↑
Power cable on
5
Power cable on
6
26
C
(Side A)
DGND
5VD
TH_R2
TH_R
FUNCTION (1)
PDET
(W2)
/RESET
SPA
PRD
PRI
IC402
3 3
CH1
CH2
↑
Power cable off
↑
D E
KMA-1000
IC401
CB401
FUNCTION (1)
(W1)
AC-B
E
OPERATION (1)
(W201) E
AC-B
POWER TRANSFORMER
F G
J655
W403A
W404A
CB403
W402A W401A
POWER TRANSFORMER
CB412
BR
W405A
GY
W406A
CB408
OPERATION (3)
(CB562)
H
MAIN (2)
(W551)
MAIN (5)
(W405B, W406B)
POWER CORD