Service manual

2
ABCDEFGH I J
1
3
4
5
7
YSP-500/HTY-750
6
62
IC509
W507
CB504
IC504
CB503
CB502
IC511
IC510
IC506
W506
IC501
IC503
CB505
CB501
IC502
(Side A)
INPUT (1) P.C.B.
+3.3V +12V GND -24V
INPUT (3) (CB901)
INPUT (2) (CB4)
+3.3V
D+12
+5A
GND GND
MGND
D+5 D+5
D+12
MGND MGND
AGND
AGND
GND
VOL_DET
RESET
PW_DOWN
-24V
+12V
D+12
GND
S3.3
S3.3BK
POW_RY
DSP (CB203)
DSP (CB607)
AC IN
1
78
14
OUT
COM
IN
OUT
COM
IN
5 k-ohms
10 W
5 k-ohms
10 W
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
P.C.B.交換時の注意
INPUT（1）およびINPUT（2）P.C.B.を交換する場合、必ず同時に行ってください。どちらか片方にバージョンの異なるP.C.B.を
取り付けると、動作しないことがあります。
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.
Caution for P.C.B. replacement
When replacing INPUT (1) and INPUT (2) P.C.B.s, be sure to replace them at the same time. Installing either P.C.B. of different version
from the other may cause failure of operation.
Ref no. Location
IC502 F3
IC503 E3
IC504 E6
IC506 C3
IC509 C6
IC510 D4
IC511 E5
Q501 G3
Q502 D3
Q503 C3
Q505 G5
Q506 D4
Q507 C6
Ref no. Location
D501 E3
D503 G3
D507 G3
D509 G3
D510 H6
D515 G5
D516 F4
D518 F5
D522 D5
D523 C5
D524 D4
D528 D4
D537 F5
IC501 E3
• Semiconductor Location
Circuit No.
C530
J506
T, K, A, B, G, E, L, V J
OX
XO
X : NOT USED
O : USED/APPLICABLE