Yamaha R-N602 Service Manual page 60

A B
R-N602
1
OPERATION (2)
2
3
4
5
POWER TRANSFORMER
CB541
CB544
AC IN
6
7
60
C D
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.
C5407 on OPERATION (2) P.C.B.
(Side A)
5 k-ohms
10 W
1 4
IC542
IC541
8
5
R
K
IC543
IC544
E F
・ 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
OPERATION (3)
DIGITAL
GND
(CB66)
A GND
GND
GND
5.5V
5.5V
5.5V
5.5V
MAIN (3)
(CB279)
DEST
PRY_IN
OPERATION (5)
DGND
(CB442)
AC_PWR
MAIN (3)
(CB281)
• Semiconductor Location
Ref no. Location
D5401 C4
D5404 D5
IC541 D3
IC542 E3
IC543 E4
IC544 D6
Q4301 G3
Q4302 H3
G H
安全対策
（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 C5407
(Side A)
MAIN (1)
(W2001)
CB434
CB433
CB432
W4302
L/R L/R L/R L/R
OUT IN OUT IN
3 2
LINE
I J
MAIN (1)
(CB201)
OPERATION (6)
(CB461)
W4301
L/R L/R
IN
1
PHONO