Yamaha RX-V381, Service Manual

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J I H G F E D C B A
1
2
3
4
5
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7
80
RX-V381/HTR-3069
IC524
IC526 IC522 IC521
IC523
IC525
CB521
CB522 CB524
CB525
CB526
CB541
CB543
CB542
IN OUT
GND VOUT VIN ON/OFF
COM IN OUT COM IN OUT COM IN OUT COM
GND
VCC OUT
R, V, S models
R, V, S models
R, V, S models
R, V, S models
POWER TRANSFORMER
OPERATION (1)
(CB403)
+5.5U
UGND
F1
+40F
F2
POWER TRANSFORMER
AC IN
HEATSINK
TEMPARETURE
5 k-ohms
10 W
5 k-ohms
10 W
5 k-ohms
10 W
5 k-ohms
10 W
R, T, K, B, G, F, L, V, S models R, V, S models
R, T, K, B, G, F, L, V, S models
MGND ACDET
PWR_RY
S9
AC5 AC5 AC4 AC4
MGND ACDET
PRY
S9
MAIN (1)
(CB2)
+40F
PS_PRT
-12A
AGND +12A
DIGITAL
(CB262)
TEST
R_200_DET
THM1 DGND
+7D +5A
DAGND
+3.3T MGND +3.3M
PRY
ACPWR_DET
AC3 AC3 AC2
E
AC2
U, C, R, K, A, B, G,
F, L, V, S, J models
U, C, R, K, A, B, G,
F, L, V, S, J models
U, C, R, K, A, B, G, F, L, V, S, J models
(Side A)
OPERATION (2)
(Side A)
OPERATION (4)
• Semiconductor Location
Ref no. Location
D5208 F5
D5209 D5
D5212 C6
D5404 D2
D5405 C2
D5406 C2
D5407 C2
D5408 C2
IC521 H4
IC522 H4
IC523 H4
IC524 F4
IC525 I4
IC526 G4
Q5204 I6
Q5401 D4
Q5402 D4
Q5403 D4
Q5404 D3
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.
C5214, C5215, C5219, C5224 on OPERATION (4) 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 （ 4 ） P.C.B. の C5214 、 C5215 、 C5219 、 C5224