Yamaha RX-V381 Service Manual page 95

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Installation manual

Owner's manual (87 pages)

Easy setup manual (2 pages)

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Table Of Contents

139

Table of Contents

OPERATION 2/2

J 5 4 0 1

s 5 4 1

C B 5 4 1

S 9

W 5 4 0 1

9.04V

Q 5 4 0 1

P W R _ R Y

2.927V

R 5 4 0 1

8 2 0

A C D E T

7.030V

M G N D

-6.2mV

5 1 0 4 8

D e s t R V O n l y

5 1 0 4 8

C B 5 2 1

A C P W R _ D E T

3.258V

P R Y

2.926V

+ 3 . 3 M

3.286V

M G N D

0.000V

+ 3 . 3 T

3.489V

D A G N D

Page 92 A7

-4.4mV

to DIGITAL_CB262

+ 5 A

5.022V

+ 7 D

8.88V

D G N D

0.000V

T H M 1

1.542V

R _ 2 0 0 _ D E T

3.288V

T E S T

3.285V

W 5 2 0 1

1 2 P

7 0 M M

P = 2 . 0

C B 5 2 2

5 2 1 5 1

+ 1 2 A

11.73V

A G N D

-0.05mV

Page 96

- 1 2 A

to MAIN (1)_CB2

-12.04V

P S _ P R T

1.762V

+ 4 0 F

R 5 2 2 3

39.95V

1 2 0 K

A C P W R _ D E T

Q 5 2 0 1

D T C 0 4 4 E U B T L

I C 5 2 5

N J M 2 3 8 8 F 3 3

+ 3 . 3 M

HEATSINK

C B 5 2 4

TEMPARETURE

S 9

9.200V

P R Y

I C 5 2 4

2.927V

A C D E T

L M 1 9 C I Z / L F T 4

7.130V

V C C

O U T

M G N D

T H M 1

-6.2mV

G N D

5 2 1 5 1

M G N D

Details of colored lines

Red / full line:

Red /dashed line: Power supply (-)

Orange:

N O T I C E

( m o d e l )

R E S I S T O R

J A P A N

R E M A R K S

P A R T S

N A M E

Yellow:

U . S . A

N O M A R K

C A R B O N

F I L M R E S I S T O R

( P = 5 )

C A N A D A

C A R B O N

F I L M R E S I S T O R

( P = 1 0 )

Green:

G E N E R A L

M E T A L

O X I D E F I L M R E S I S T O R

C H I N A

Brown:

M E T A L

F I L M

R E S I S T O R

K O R E A

M E T A L

P L A T E R E S I S T O R

Blue:

A U S T R A L I A

F I R E

P R O O F C A R B O N

F I L M R E S I S T O R

B R I T I S H

C E M E N T

M O L D E D R E S I S T O R

S T A N D A R D

S E M I

V A R I A B L E

R E S I S T O R

S I N G A P O R E

C H I P R E S I S T O R

S O U T H E U R O P E

★ All voltages are measured with a 10M Ω /V DC electronic voltmeter.

T A I W A N

R U S S I A N

C A P A C I T O R

★ Components having special characteristics are marked ⚠ and must be replaced

L A T I N A M E R I C A

R E M A R K S

P A R T S

N A M E

with parts having speciﬁcations equal to those originally installed.

B R A Z I L

N O

M A R K

E L E C T R O L Y T I C

C A P A C I T O R

T H A I

T A N T A L U M

C A P A C I T O R

★ Schematic diagram is subject to change without notice.

N O

M A R K

C E R A M I C

C A P A C I T O R

C E R A M I C

T U B U L A R

C A P A C I T O R

P O L Y E S T E R F I L M

C A P A C I T O R

● 電圧は、内部抵抗 10M Ωの電圧計で測定したものです。

P O L Y S T Y R E N E

F I L M

C A P A C I T O R

M I C A

C A P A C I T O R

● ⚠印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、

P O L Y P R O P Y L E N E

F I L M

C A P A C I T O R

パーツリストに記載されている部品を使用してください。

S E M I C O N D U C T I V E C E R A M I C C A P A C I T O R

P O L Y P H E N Y L E N E

S U L F I D E

F I L M

● 本回路図は標準回路図です。改良のため予告なく変更することがあります。

C A P A C I T O R

D 5 4 0 4

R 5 4 0 7

2 P 4 7

O P E ( 2 )

S U B T R A N S

1 T 2 A 1

s 5 5 8

s 5 5 7

5 4 1 - 5 6 0

5 4 0 1 - 5 6 0 0

SUB

TRANSFORMER

T 5 4 0 1

s 5 4 9

Q 5 4 0 5

s 5 4 2

D T C 0 1 4 E U B T L

S T 5 4 1

I C 5 2 3

K I A 7 8 0 5 A P I

5.025V

O U T

I N

+ 5

C O M

19.73Ｖ

Q 5 2 0 4

C 4 4 8 8 ( S / T )

I C 5 2 1

R 5 2 1 1

+ 3 . 3 T

K I A 7 8 1 2 A P I

2 2

11.73Ｖ

O U T

I N

+ 1 2

C O M

-20.76Ｖ

- 1 2

R 5 2 2 4

O U T

I N

4 3 K

K I A 7 9 1 2 P I

I C 5 2 2

-12.04Ｖ

P S _ P R T

D 5 2 0 7

R 5 2 1 4

R _ 2 0 0 _ D E T

s 5 3 2

s 5 3 3

R 5 2 1 7

1 P 0 . 4 7

1 S S 3 5 5 V M

D G N D

J U C A

; n o _ u s e

1 S S 3 5 5 V M

R T K B G L V F S ; u s e

I C 5 2 6

s 5 2 5

K I A 7 8 0 5 A P I

5.860Ｖ

O U T

I N

+ 5 . 5

C O M

s 5 2 2

s 5 2 1

R 5 2 2 1

1 P 0 . 2 2

(R, T, K, B, G,

F, L, V, S models)

IC501: BH76330FVM-TR

Video signal switching ICs

Power supply (+)

Signal detect

Clock

Protection detect

Reset signal

Panel key input

+ - - - - - - - - + - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - +

s x x

L O C A T I O N

s 5 2 1

R 5 2 2 1

s 5 2 2

D 5 2 1 2

s 5 2 3

C 5 2 2 4

s 5 2 4

C 5 2 2 3

OPERATION (2)

s 5 2 5

I C 5 2 6

s 5 2 6

R 5 2 1 9

s 5 2 7

R 5 2 2 0

s 5 2 8

R 5 2 1 8

s 5 2 9

C 5 2 2 2

P O W E R C O R D

s 5 3 0

C 5 2 2 1

J 5 4 0 2

C B 5 4 2

120.0VAC

s 5 4 1

AC IN

s 5 3 1

C 5 2 2 0

代表(U仕向け）

120.0VAC

V H I S

s 5 3 2

R 5 2 1 4

POWER

J 5 4 0 3

TRANSFORMER

s 5 3 3

D 5 2 0 7

T R A N S F O R M E R

s 5 3 4

R 5 2 2 9

R D 3 5 0 0 0

C B 5 4 3

s 5 4 1

J 5 4 0 1

V N 5 0 0 0 0

120.0VAC

J 5 4 0 2

J 5 4 0 4

F 5 4 0 1

s 5 4 2

T 5 4 0 1

X 8 5 2 0 A 0

s 5 4 3

120.0VAC

X 8 5 2 0

V H I S

s 5 4 3

F 5 4 0 1

W U 2 5 9 3 0

1 5

6 . 3 0 A 2 5 0 V

s 5 4 4

C 5 4 0 5

C 5 4 0 6

s 5 4 5

C 5 4 0 4

Z D 5 2 0 0 0

0 . 0 1 / 1 0 0

s 5 4 6

C 5 4 0 3

OPERATION (4)

s 5 4 7

R 5 4 0 8

s 5 4 8

R 5 4 0 9

O P E ( 4 )

P O W E R

s 5 4 9

Q 5 4 0 5

5 2 1 - 5 4 0

s 5 5 0

D 5 4 0 3

5 2 0 1 - 5 4 0 0

s 5 5 1

Q 5 4 0 4

P N 5 2 1

s 5 5 2

Q 5 4 0 3

n o _ u s e

s 5 5 3

Q 5 4 0 2

L = 5 0 # 1 8

P N 5 2 3

P N 5 2 2

s 5 5 4

R 5 4 0 4

s 5 5 5

R 5 4 0 5

n o _ u s e

W S 4 8 8 5 0

L = 9 0 # 1 8

C B 5 2 5

A C _ 1 2

s 5 5 6

R 5 4 0 6

A C 2

16.37VAC

E _ 1 2

0.002VAC

s 5 5 7

D 5 4 0 4

A C _ 1 2

A C 2

16.33VAC

s 5 5 8

R 5 4 0 7

A C 3

4.700VAC

A C 3

4.824VAC

A C 4

4.541VAC

to POWER

A C 4

4.512VAC

TRANSFORMER

F 1

A C 5

3.005VAC

F 2

A C 5

2.942VAC

X H L

5.801VAC

AV1

AV2

D 5 2 1 0

C B 5 2 6

F 2

D 5 2 1 1

+ 4 0 F

VIDEO

Page 94 I2

F 1

to OPERATION (1)_CB403

U G N D

AV3

+ 5 . 5 U

5 2 1 4 7

MONITOR

D 5 2 1 3

OUT

n o _ u s e

D 5 2 1 4

n o _ u s e

J 5 2 0 1

G 5 2 0 1

T P 0 0 3 8 5

IC522: KIA7912PI

Voltage regulator

COMMON (GND)

R22

R15

R18

R21

R23

Q28

Q17

Q21

Q22

Q24

R16

Q23

R13

R12

R24

Q19

Q29

R20

Q20

Q18

Q25

Q30

R14

R17

Q31

R25

R19

Q12 Q13

Q26-1

R11

R10

R26

Q26

Q27

OUTPUT

Q27-1

Q14

Q15

Q16

Q11

Q10

INPUT

U C

R V S

K B G L F

W J 7 8 7 5 0

1 P 0 . 2 2

W J 2 8 6 7 0

| R S 4 0 3 M - B - C - J 8 0 | R S 4 0 3 M - B - C - J 8 0 | R S 4 0 3 M - B - C - J 8 0 |

U R 7 3 9 4 7

4 7 0 0 / 1 6

U S 1 3 5 3 3

0 . 3 3 / 1 6

X 4 9 2 8 A 0

K I A 7 8 0 5 A P I

R F 4 5 4 3 9

3 9

R F 4 5 4 4 7

4 7

R F 4 5 6 1 0

1 K

U S 0 3 5 1 0

0 . 1 / 1 6

U R 8 6 7 1 0

1 0 / 5 0

U S 0 3 5 1 0

0 . 1 / 1 6

W W 9 7 2 5 0

2 . 2 K

W Y 1 6 4 9 0

U D Z V 2 7 B

V N 5 0 0 0 0

X 8 5 2 1 A 0

X 8 5 2 2 A 0

X 8 5 2 3 A 0

X 8 5 2 1

X 8 5 2 2

X 8 5 2 3

W U 2 5 9 3 0

W U 5 7 9 1 0

Z E 2 8 7 1 0

6 . 3 0 A 2 5 0 V

5 . 0 0 A 2 5 0 V

3 . 1 5 A 2 5 0 V

Z D 5 2 0 0 0

0 . 0 1 / 1 0 0

Z D 5 2 0 0 0

0 . 0 1 / 1 0 0

U R 8 9 7 1 0

1 0 / 1 0 0

R D 3 5 8 1 0

1 0 0 K

R D 3 5 7 4 7

4 7 K

W W 7 8 2 1 0

D T C 0 1 4 E U B T L

W Y 1 6 3 1 0

U D Z V 4 . 7 B

W B 2 2 8 7 0

K T A 1 2 6 6 ( Y )

V P 8 7 2 6 0

A 1 7 0 8 ( S / T )

W B 2 2 8 7 0

K T A 1 2 6 6 ( Y )

R D 3 5 6 1 0

1 K

R D 3 5 7 2 2

2 2 K

R D 3 5 6 4 7

4 . 7 K

V S 9 9 7 8 0

1 T 2 A 1

V C 7 5 7 9 0

2 P 4 7

P J 5 0 1

1 0 / 1 0

O P E ( 3 )

V I D E O

A V 1

C 5 0 0 1

5 0 1 - 5 2 0

5 0 0 1 - 5 2 0 0

C 5 0 0 5

I N 1

G N D

C T L A

O U T

1 0 / 1 0

I N 2

V C C

A V 2

0 . 1 / 1 6

4 7 / 1 6

C 5 0 0 2

C T L B

I N 3

M S P - 2 5 2 V 2 - 0 7 N I

B H 7 6 3 3 0 F V M - T R

V S E L 1

P J 5 0 2

V S E L 2

1 0 / 1 0

A V 3

C 5 0 0 3

R 5 0 0 5

M O N O U T

7 5

V E

M S P - 2 5 2 V 2 - 0 7 N I

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

RX-V381/HTR-3069

IC525: NJM2388F33

Low dropout voltage regulator with ON/OFF control

OUT

Bandgap

Reference

ON/OFF

Cont

control

Over Voltage

Thermal

Over Current

Protection

GND

IC523, 526 : KIA7805API

IC521

: KIA7812API

Voltage regulator

INPUT

R17

Q11

Q11-1

Q15

Q16

Q12

Q14

R14

R10

R15

Q19

Q17

R19

R16

R12

OUTPUT

R20

Q18

R18

R11

Q10

R21

Q13

R13

COMMON (GND)

OPERATION (3)

P N 5 0 1

W S 4 8 8 4 0

L = 5 0 # 1 8

V E

C 5 0 0 6

+ 5 V

C B 5 0 1

V S E L 1

0.30mV

Page 90 E1

V S E L 2

0.20mV

to DIGITAL_CB225

+ 5 A

+ 5 V

5.021V

J 5 0 0 1

4 P

1 6 0 M M

P = 2 . 0

A G N D

-0.002V

W 5 0 0 1

n o _ u s e

5 1 0 4 8

V E

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Yamaha RX-V381 Service Manual page 95

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