Yamaha A-s300 Service Manual
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Page 51
MAIN (2) P.C.B. (Side B) MAIN (5) P.C.B. (Side B) A-S300 (J model) MAIN (6) P.C.B. (Side B) R model ABCDE FGH I J 1 2 3 4 5 6 7A-S500/A-S300 51 • Semiconductor Location Ref no. Location D16 D6 D18 G5 D19 H5 D20 H5 D21 H5 D23 G5 Q11 D6 A-S500 A-S300
Page 52
W301 W302 IC309 IC311CB302 IC301 CB303 CB301DOCK DOCK P.C.B. (Side A) 1 35 4 -15+15 AGND_VIDEO SIRILSIRIR AGND_DOCK DOCKLDOCKR +7I IGNDVRG+5MTR MGSIRI_MISOSIRI_MOSIUAW_PONDOCK_TYPIPD_N_VONIPD_MOSI +5.5SUBPRVIPD_APDETDOCK_PONSIRI_PONIPD_N_DETIPD_MISO 148 1 5 4 OPERATION (1) (CB21) OPERATION (9) (CB854) FUNCTION (1) (CB511) FUNCTION (1) (CB508) No replacement part available.
Page 53
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FUNCTION 1/2
A-S500/A-S300
SCHEMATIC DIAGRAMS★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
/ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.Ô ?yxz º
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Page 54
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10BCDE FGH I J K LMN
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FUNCTION 2/2★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
/ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.Ô ?yxz º
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Page 55
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OPERATION 1/2
A-S500/A-S300
★
All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
/ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice. Ô ?yxz º
æ
Å .
w ?y-p `h‹wpb{
Ô/ ¹wK”
æ
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Page 56
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10BCDE FGH I J K LMN
A-S500/A-S300
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OPERATION 2/2
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
/ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.Ô ?yxz º
æ
Å .
w ?y-p `h‹wpb{
Ô/ ¹wK”
æ
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Page 57
A 1 2 3 4 5 6 7 8 910BCDE FGH I J K L MN 57 MAIN 1/2 A-S500/A-S300 ★ All voltages are measured with a 10MΩ/V DC electronic voltmeter. ★ Components having special characteristics are marked / and must be replaced with parts having specifications equal to those originally installed. ★ Schematic diagram is subject to change without notice. W104 CB104 CB15 CB15 CB8 CB101 CB108 W101 W105 W103 W102 CB107CB106 IC103 IC103 IC102 IC101 OUT L SUBWOOFER OUT 0 0 0 0 0 38.2 -38.2 21.9 -21.8 2.9 0 19.50 12.7...
Page 58
A 1 2 3 4 5 6 7 8 9 10BCDE FGH I J K LMN A-S500/A-S300 58 MAIN 2/2★ All voltages are measured with a 10MΩ/V DC electronic voltmeter. ★ Components having special characteristics are marked / and must be replaced with parts having specifications equal to those originally installed. ★ Schematic diagram is subject to change without notice. CB26 CB13 CB19 CB14 CB25 CB11 CB12 W10 0 0 0 00 -21.8 21.9 038.2 27.0 27.0 -15.4 -16.6 16.7 -16.6 -17.015.5 38.2 -38.2 21.9 -21.8 2.90 0 0 0 -15.4 2.9 0 -27.40 0...
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910BCDE FGH I J K
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MAIN 1/2
A-S500/A-S300
★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
/ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.Ô ?yxz º
æ
Å .
w ?y-p `h‹wpb{
Ô/ ¹wK”
æ
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Page 60
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10BCDE FGH I J K LMN
A-S500/A-S300
60
MAIN 2/2★ All voltages are measured with a 10MΩ/V DC electronic voltmeter.
★ Components having special characteristics are marked
/ and must be replaced
with parts having specifications equal to those originally installed.
★ Schematic diagram is subject to change without notice.Ô ?yxz º
æ
Å .
w ?y-p `h‹wpb{
Ô/ ¹wK”
æ
¼xz†
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