Sony KV-BM21M10, KV-BM21M40, KV-BM21P42 Service Manual

4-1. BLOCK DIAGRAM

VIF & SIF SAW

MAIN

Power

Supply

FSS TUNER

AGCin

12C

Video

L(Mono)

Video

L(Mono)

CV/YC

L(Mono)

CV/YC

L(Mono)

G/Y

B/P

B

R/P

R

L

Fbl(RGBin)

24.576MHz

DVD/RGB

AV2

AV3

AV1

Mon out

Audio Amp

TV

out

Mon

out

AV1

in

AV2

in

CV/YC

L(Mono)

AV3

in

RGB/

DVD

in

5V 30V

IF

29~5.VIF12

115.P3

114.P2.3

STBY

3.3V

AC in ~

110-220V

CISPR/

PFC

1.8V 5V 8V

3.3/5V

Relay

8V AUDIO VCC

HV

DGC

+/-15V

Hout

FBT

L

1/2ch

Audio Amp

ATT

VAR

NVM

Pin out
H-drive

H-out

Rot. cct

V-out

VM

RGB Amp

feedback

3W

Mono

R

3W

L,R

L

HP

mute

EHT, ABL

Hp

1k

EW, Hd

V+, V-

RGB

+B

On/Off

stdby

Device 12C

12C

PLL

I/O Port

I/O Port

VIF & SIF POWER

Color

Decoder

YUV

Processor

Jungle

RGB

FM MONO Dem

Volume control

ONE CHIP

Micro

Text

CC & V-chip

11.Xtalout

10.Xtalin

74~76.YUVout

70-72.RGB2 in

119.ADC2

116.ADC1,103.PO.3

126.INT2

98, 99. SDA1, SCL1

108, 109. SDA0, SCL0

102.P0.4

122~3.P2.4~5

77.Fbl3

78~80.RGB3

34.InL5

51.CV/Y4

52.C4

49.InL.4

31.AGCout

43.IFVO

62.HPL

48.SV0

36.OutL, 1

85~87

RGBout

84.lk

65.SVM

23. V+

22. V-

112.PWMO

113.P2.2

21.EWD

67.Hout

66.Fbiso

32.EHTO/OVP

83.BCKin

??60.LSL

106.P0.2

105.P0.1

58.CV/Y3

59.C3

56.InL,3

55.CV/Y2

70.CX

53.InL.2

B-INT

LED

+B line

30V

Stdby Power

STBY 3.3/5V

Relay

JP

Video

AVlink(scart)

Mode1,2

SIRCS

CXA2085

ID1

JP

EU

Detect

D1

YPB P

R

Key buttons

– 33 –

DIAGRAMS

SECTION 4

KV-BM21N70

RM-W101

RM-W151

KV-BM21M10/BM21M40/BM21P42

KV-BM21M10/BM21M40/BM21P42

RM-W101

KV-BM21N70

RM-W151

4-2. CIRCUIT BOARDS LOCATION

C Board

4-3. SCHEMATIC DIAGRAM INFORMATION

Note:

• All capacitors are in µF unless otherwise noted.

• All electrolytic capacitors are rated at 50V unless otherwise

noted.

• All resistors are in ohms.
kΩ = 1000Ω, MΩ = 1000kΩ

• Indication of resistance which does not have rating
electrical power is as follows.

Pitch: 5 mm
Rating electrical power 1/4W (CHIP: 1/10W)

• : nonflammable resistor.

• : fusible resistor.

• ¢ : internal component.

• : panel designation or adjustment for repair.

• All variable and adjustable resistors have characteristic

curve B unless otherwise noted.

• Readings are taken with a color-bar signal input.
no mark : Common
( ) : PAL
[ ] : NTSC 3.58

• Readings are taken with a 10 MΩ digital multimeter.

• Voltage are dc with respect to ground unless otherwise

noted.

• Voltage variations may be noted due to normal
production tolerances.

• All voltage are in Volt.

• ✽ : Cannot be measured.

• Circled numbers are waveform references.

• : B +bus.

• : B –bus.

• k : signal path.

Note: The reference number which starts with Wxxx

(eg: W003) indicates a wire to wire connection.

Note: Components marked as XX are not fitted on this

model.

A Board

Reference information

RESISTOR : RN METAL FILM

: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RS NONFLAMMABLE METAL

OXIDE
: RB NONFLAMMABLE CEMENT
: RW NONFLAMMABLE

WIREWOUND
: ✽ ADJUSTMENT RESISTOR

COIL : LF-8L MICRO INDUCTOR
CAPACITOR : TA TANTALUM

: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE

Note: The component identified by shading and

mark ! are critical for safety. Replace only
with part number specified.

Note: “A” board schematic diagram is divided into 6 blocks.

Each block is named by its function and block
“alphabet”. eg: Processor (Block A)
Joint connection between boards can be identified
using the block alphabet followed by sequence
numbering.
eg: -<HOUT-DEFL (A10) To D11
Meaning: Block A joint A10 is connected to Block D
joint D11

– 34 –

J

2kV

4700p

E

C752

1000p

B

C782

1

1P

CN705

GND

*

D780

*

D781

L750

XX

22uH

L780

Q701

XX

CHIP

XX

R775

CHIP

XX

R777

R766

XX

R767

XX

R768

XX

R784

XX

R785

XX

R786

XX

UDZSTE-175.6B

D782

CHIP

XX

R776

CHIP

XX

R778

250V

4.7

C754

JW702

XX

C759

XX
CH

1
2
3
4
5

WHT

5P

CN703

200V
NC
GND
H1
NC

3

4

5

6

7

8

9

10

11

13

1

GND

GND

1

J751

110M

RV750

1/2W

*

R760

1/2W

100

R763

1/2W

100

R764

1/2W

100

R765

1/2W

560k

R773

1/2W

1k

R756

1/2W

1k

R757

1/2W

1k

R758

HSS82-TJ

D756

HSS82-TJ

D755

HSS82-TJ

D754

R774

150

3W
RS

1/2W

100

R783

R713

0 :CHIP

C783

1000p

B:CHIP

1

CN704

1P

1000V

13 987654

2

TDA6108AJF/N1

IC751

B IN

G IN

R IN

GND

IK

VDD

R OUT

G OUT

B OUT

0.47

R794

GP08D

D750

1/2W

470k

R780

1/2W

FPRD

100K

R795

1
2
3
4
5
6
7

7P

CN701

WHT

GND

B
G
R

GND

1K
9V

1000p

B:CHIP

C786

500V

XX

B

C753

500V

1000p

C787

RS

R781

0.56

JW1781

5

JW1782

5

5

JW1783

CHIP

680

R752

CHIP

680

R753

CHIP

680

R754

250V

10

C751

250V

4.7

C781

XX

C788

XX

C790

XX

C789

XX

L781

XX

L782

XX

L783

+9V

+200V

R-OUT

R-IN

C

FV

RCV

(VIDEO AMP)

B-BX1S11731-OCE-C..-BM21M10

1

2

3

4

5

6

9V

9V

1000V

200V

H

KG G2

CV KR G1 G4

HV

KB

A51LPT70X

PICTURE TUBE

TO EARTH

COATING ASSY

TO A BOARD

(DEFLECTION)

CN801

TO A BOARD

(PROCESSOR)

CN004

145154411

I

H

G

F

E

D

C

B

A

4-3-1. C Board Schematic Diagram

12345 6 7

– 35 –

KV-BM21M10/BM21M40/BM21P42

KV-BM21N70

RM-W101

RM-W151