Yamaha RX-V483/HTR-4071, Service Manual

Page: 92 / 153

J I H G F E D C B A
1
2
3
4
5
6
7
92
RX-V483/HTR-4071
CB501
CB542 CB543
W5401
W5403
CB544
CB541
IC542
IC541
IC543
IC544
DIGITAL
(CB27)
V_N_MUTE
VSEL2
VSEL1
+5V
VE
VIDEO
MONITOR OUT AV 3 AV 2 AV 1
K
A
R
4
5
1
8
4
1
3 2
1 2
4 3
DIGITAL
(CB24)
TEST
PRY
ACPWR_DET
DGND
+3.3M
DIGITAL (CB81)
+5.5V +5.5V GND GND
5 k-ohms
10 W
5 k-ohms
10 W
AC IN
POWER TRANSFORMER
(Side A)
OPERATION (2)
(Side A)
OPERATION (3)
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 the capacitors 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, connect a discharging resistor
(
5 k-ohms/10 W) to the terminals of each capacitor indicated below to discharge electricity. The time required for
discharging is about 30 seconds per each.
C
54 1 9 , C 54 22 on OPERATION (2) P.C.B.
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。
・ 下記のコンデンサには電源を
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 k Ω /10 W ）を下記の各コンデンサの端子間に接続して放電してください。放電所用時間は各々約 30 秒間です。
OPERATION
（
2
）
P.C.B.
の
C 54 1 9
、
C 54 22
• Semiconductor Location
Ref no. Location
D 54 02 C 5
D 54 0 9 C3
IC 54 1 C 4
IC 54 2 D 4
IC 54 3 B3
IC 544 B3