Hameg HM 303-4, Service Manual

Subject to change without notice

18

Power Supply (PS-Board)

A

B

C

D

876543

21

D

C

B

A

1

2

3

4

5

6

7

8

Title :

Rev.:

R

Date :

Document Number :

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

MPT

8

1

2

3

4

5

6

7

8

9

10

11

12

13

16

15

14

17

DR1001

ETD39/303

P1001 Power Recept.

S1001

NT

R1001

NTC 8

C1006 2200p Y 250V

U

R1005 S14K275

C1003 0.33u

X2 250V

1

4

3

2

L1001

2x33mH 1A

C1002

0.1u

X2 250V

R1019 1K00

R1030

681R

R1020

75K

D1007

BZV55B16

C1001 4700p Y 250V

+

C1011 68u 400V

+

C1025

68u 400V

F1001 0.5AF

R1037 8K25

R1031 200K

1

2

4

6

5

IC1001

CNY17-2Z

R1068 1K3

R1065

1K3

C1027

220p 400V

R1018 100K 411

R1060 4K99

6

3

2

8

5

1

4

7

IC1003

C1041

0.1u 50V

+

C1020

220u 16V

R1045 10K0

C1012 1n 250V

R1039

200R

R1032

5K11

R1026 47K5

R1033

1K82

R1008 1K0

2

3

D1011

BAS20

D1017 BYD37M

R1017 100K 411

1

3

2

T1003

STHV82FI ISOWATT 218

R1013

R207

200K

R1021 75K

C1005 2200p

Y 250V

3

21

IC1002

TL431C

TO-92

A

C1021 100p 2kV

D1022 BYD77G

D1019 BYD77G

R1010

R207

90R9

D1027

BYD37M

+

C1026

330u 25V

+

C1029

1000u 16V

+

C1023

1000u 16V

+

C1022 330u 25V

C1033 0.1u 400V

MKT

L1005 68uH 1.5A

L1004

68uH 1.5A

L1003

220uH 1A

C1035

10n 400V MKT

D1025

DD1400

D1024

DD1400

D1016

DD1400

1

2

3

4

5

6

P1010 WIRE6

+

C1009 100u 35V

D1014

BYD37M

D1012

BYT01-400

+

C1015 100u 16V

R1035 22R

R1015

0R22

2W

2

3

1

T1011 BC850

c

SOT-23

1

2

3

T1009

BC860 SOT-23

c

C1044

1n 50V

R1059

1K00

R1047

22K1

4

2

1

3

D1001

FL406

+

C1030 10u 250V

+

C1017 1u 50V

+

C1028

22u 160V

D1026

BYD37M

3

2

1

T1004

TO-126

BD434

2

3

1

T1012 BC850 SOT-23

c

R1062

619R

+

C1032 100u 16V

R1053

619R

1

2

3

T1008

BC860 SOT-23

c

3

2

1

T1002 BD433 TO-126

C1042

1n 50V

R1061

10K0

R1056

10K0

+

C1034

100u 16V

R1054

3K01

-

+

3

2

1

IC1004A

TL082CN

R1055 511R

R1043 7K50

C1045

0.1u 50V

C1046

0.1u 50V

2

3

1

T1006

BF822

R1024

1M00

R1011

10M0

VR37

R1034

1M00

R1027

0R0

R1023

750K

C1004 47n 2kV

D1010 BZV55C75

R1067

1K00

R1057 4K32

2

3

1

T1007 BF822 SOT-23

R1012 6M81 VR37

R1064

47K5

R1044 475K

R1041 475K

R1040 10K0

R1006 470K

R1007

1M00

1

2

3

T1005 BC860 SOT-23

c

C1018

10n 400V

C1024

68p 3KV

C1007 10n 400V

C1010 0.1u 100V

R1004

470K

R1003 470K

C1043 10n 50V

R1069

8K25

1

2

3

4

5

6

P1003 WIRE6

R1028

1M00

D1005 LL4151

D1018 LL4151

R1058

750K

R1046 22K1

1

2

3

4

5

6

P1005

WIRE6

B1003

1

2

3

4

5

6

P1002

MOLEX6S

R1002

332K

VR37

+Vcc

-Vcc

4

8

IC1004C TL082CN

C1019 10n 2kV

R1025 27k4

R1014

0R39

2

3

1

T1010 BC850 SOT-23

c

R1052

511R

R1051

12K1

D1015

LL4151

-

+

5

6

7

IC1004B

TL082CN

R1063 2k21

3

2

1

IC1005

TL431C TO-92

A

R1071

1K0

R1072 3K32

R1016 1K0

R1070 1K00

D1023 LL4151

R1066 7K50

R1029

1M00

R1009

R207

90R9

B1007

D1013 LL4151

D1020

BYD37M

D1021

BYD37M

1

2

3

4

5

6

P1008 WIRE6

B1008

B1009

B1011

1

2

3

4

5

6

P1009 WIRE6

L1006 68uH 1.5A

C1016

0.1u 100V

1

2

3

5

4

6

7

8

9

10

B1010

D1009

BYD37M

D1004

BYV27-100

D1003

BYV27-100

R1022

1K82

R1036

750K

R1042

750K

B1013

+

C1031

22u 160V

L1007 68uH 1.5A

+

C1036

10u 250V

C1037

0.1u 250V

MKT

13

14

15

16

17

18

19

20

21

C1040

0.1u 50V

R1038

0R0

C1039

4n7 50V

D1006 LL4151

R1050 332K

R1048 301K

R1049 56K2

1

3

2

T1001 BUX86 TO-126

B1001

R1073

R207

1K0

R1074

75K

+

C1038

1u 50V

LINE

+185V

+141V

31V

+12V

-12V

+12V

G1

LINE

+12V -12V

G1

-13.5V

+13.5V

12.9V

0.4V

+13.5V

-13.5V

HVC

+12V -12V

+141V

+185V

-12V

+12V

6.3V

FOKUS

HT14

-1950V

-1950V

+12V

BLV

BLV

HT1

HT14

-2025V

HT1