Yamaha RX-V381, Service Manual

Page: 84 / 138

J I H G F E D C B A
1
2
3
4
5
6
7
84
RX-V381/HTR-3069
CB1
CB5
CB4
W1
CB2
CB3
MAIN (3)
(CB42)
MAIN (2)
(CB46)
+3.3D
AUD1_D
DGND
AUD2_D
DGND
AV1_D
DGND
AGND
ADR
2AGND
ADL
-12A
AUXR
AUXE
AUXL
+12A
MIC
AGND
DA_FL
AGND
DA_FR
AGND
DA_C
AGND
DA_SW
AGND
DA_SL
AGND
DA_SR
SPEAKERS
SUBWOOFER
PRE OUT OPTICAL
AUDIO2 AUDIO1 AV1
COAXIAL
AV3
L/R
AV2
L/R (TV)
COAXIAL
(CD)
SURROUND
+/- +/-
+/- +/-
CENTER
R L
FRONT
R L
POWER
TRANSFORMER
ACH
ACL
ACH
E
E
ACL
DIGITAL
(CB222)
TUL
TUE
TUR
5CH_MT
SW_MT
VOL_MOSI
VOL_SCK
DGND
DC_PRT
I_PRT
AMP_OLV
AMP_LMT
TRANS_RY
HP_N_DET
HPRY
SPRY_5CH
PS_PRT
THM2_PRT
5 k-ohms
10 W
5 k-ohms
10 W
OPERATION (4)
(CB522)
+40F
PS_PRT
-12A
AGND
+12A
OPERATION (7)
(CB477)
HPL
HPG
HPR
HP_N_DET
(Side A)
MAIN (1)
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 3 0 seconds per each.
C7 9 , C 8 0 on MAIN (1) 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 3 0 秒間です。
MAIN
（
1
）
P.C.B.
の
C7 9
、
C 8 0
• Semiconductor Location
Ref no. Location
D47 H5
D4 8 I 3
Q1 3 D 5
Q14 D 5
Q1 5 D 5
Q17 C 5
Q1 8 B 5
Q1 9 F 6
Q20 E 6
Q2 3 D 6
Q24 C 6
Q2 5 G 5
Q2 6 F 5
Q27 H6
Q2 9 D 6
Q 3 1 G 6
Q 3 2 F 6
Q 33 F 6
Q 3 4 E 6
Q 35 H6
Q 36 G 6
Q 39 D 6
Q40 C 6
Q41 C 6
Q42 B 6
Q4 3 G 6
Q44 F 6
Q4 5 F 6
Q4 6 E 6
Q47 G 6
Q4 8 G 6
Q 5 1 D 6
Q 5 2 C 6
Q 53 C 6
Q 5 4 B 6
Q 6 2 E4
Q 63 F 5
Q 6 4 E4
Q 65 E4
Q 66 F 5
Q 6 7 F4
Q 68 F4
Q77 I 3
Q 8 0 E 3
Q 8 1 E4