Yamaha YSP-600 Service Manual page 68

A B
YSP-600/HTY-760
1
INPUT (1) P.C.B. (Side A)
2
3
4
AGND
5 +12V
AGND
D+12
GND
GND
VOL_DET
S3.3
RESET
S3.3BK
PW_DOWN
POW_RY
-24V
INPUT (2)
(CB4)
+5A
6
GND
D+12
INPUT (2)
(CB8)
7
68
C D E
Notes)
Safety measures
• Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such
as wearing insulating gloves.
• Note that positions indicated below are dangerous even after the power is turned off because an electric charge remains and a high
voltage continues to exist there. Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/
10W) between terminals at following positions. The time required for discharging is about 30 seconds.
1. C502 on INPUT (1) P.C.B.
2. C523 on INPUT (1) P.C.B.
INPUT (3)
(CB901)
5 k-ohms
10 W
W506
OUT
IN
COM
IN
COM
OUT
W507
CB504
W508
INPUT (2)
(CB7)
DSP
(CB203)
F G
注意）
安全対策
・ この製品の内部には高電圧部分があり危険です。修理の際は、絶縁性の手袋を使用するなどの安全対策を行ってください。
・ 下記箇所には電源をOFFにした後も電荷が残り、高電圧が維持されており危険です。修理作業前に放電用抵抗 （5 kΩ/10 W）
を下記箇所の端子間に接続して放電してください。放電所用時間は約30秒間です。
1. INPUT （1） P.C.B.のC502
2. INPUT （1） P.C.B.のC523
7 8
IC503
IC501
1 14
IC511
IC504
5 k-ohms
10 W
DSP
(CB607)
H I
AC IN
CB503
CB502
• Semiconductor Location
Ref no. Location
D501 E3
D503 G3
D510 H6
D515 G5
D516 F4
D518 F5
D522 D5
D523 C5
D524 D4
D528 D4
D537 F5
IC501 E3
Circuit No. U, C, T, K, A, B, G, E, L, F, V
C530 O
J506 X
X : NOT USED
O : USED/APPLICABLE
J
Ref no. Location
IC502 F3
IC503 E3
IC504 E6
IC506 C3
IC510 D4
IC511 E5
Q501 G3
Q502 D3
Q503 C3
Q505 G5
Q506 D4
Q507 C6
J
X
O