Yamaha Bass Amplifier service manual F-20B, Description, Remarks, New parts, RANK Japan only

Page 11
DESCRIPTION

F-20B

*

*

*

REF NO. PART NO.

DESCRIPTION

 

REMARKS

QTY RANK

--

OVERALL ASSEMBLY

F-20B

 

 

Overall Assembly

J

(V745880)

 

--

Overall Assembly

U,C

(V745890)

 

--

Overall Assembly

H

(V745900)

 

--

Overall Assembly

B

(V745910)

 

10V 7 4 6 11 0 0 Overall Cabinet Assembly

 

20

--

Pre-Main Unit

 

 

J

(V745930)

 

 

20

--

Pre-Main Unit

 

 

U,C

(V745940)

 

 

20

--

Pre-Main Unit

 

 

H

(V745950)

 

 

20

--

Pre-Main Unit

 

 

B

(V745960)

 

 

30

VN347600

Truss Head Screw

4.0X25 MFZN2BL

4

01

 

40

E T 5 0 0 0 4 0 Flat Washer

4.0X10X0.8 MFZN2BL

4

01

 

50

--

Label

 

 

J

(V745970)

 

 

50

--

Label

 

 

U,C

(V745980)

 

 

50

--

Label

 

 

H,B

(V745990)

 

 

60

XO361A00

Speaker Unit

4ohm 30W

 

 

 

 

60a

VB403600

Bind Head Screw

 

 

 

4

01

 

 

 

 

 

 

 

 

 

 

 

 

V 7 4 6 11 0 0

OVERALL CABINET ASSEMBLY

 

 

F-20B

 

 

 

 

 

Overall Cabinet Assembly

 

 

 

 

 

 

 

C10

--

Cabinet Assembly

 

 

 

(V746050)

 

 

 

C20

V 5 9 6 9 0 0 0

Corner Protector

 

 

 

 

6

01

 

C30

2 1 7 7 0 2 0 0

Oval Head Screw

3.0X12 MFZN2BL

 

 

 

12

01

 

C40

V 6 3 2 7 2 0 0

Handle

KPBO KAH1D-205

 

 

 

 

 

 

C50

V 6 3 2 7 3 0 0

Handle Holder

KPBO KAH3D400-A

 

 

 

2

 

 

C60

V 7 0 1 7 9 0 0

Oval Head Screw

4.0X25 MFZN2BL

 

 

 

2

 

 

C70

V 6 3 2 7 4 0 0

Foot

KPBO KRRU19

 

 

 

4

01

 

C80

EP030310

Bind Head Tapping Screw-1

3.0X16 MFZN2BL

 

 

 

4

01

 

C90

0 3 7 6 5 5 8 0

Flat Washer

3.0X8X0.5 MFZN2BL

 

 

 

4

01

 

C100

V 7 3 6 3 3 0 0

Name Plate

 

 

 

 

 

 

 

C110

VN729100

Bind Head Tapping Screw-1

3.0X10 MFZN2BL

 

 

 

2

01

 

A

E I 3 4 0 2 5 6

Bind Head Tapping Screw

4.0X25 FCRM3-BL

 

 

 

8

01

 

 

 

 

 

 

 

 

 

 

*New parts

RANK: Japan only

3

Image 11
Contents BASS AMPLIFIER CONTENTSIMPORTANT NOTICE FOR THE UNITED KINGDOM F-20BWARNING CHEMICAL CONTENT NOTICE IMPORTANT NOTICEF-20B SPECIFICATIONSPANEL LAYOUT POWER TRANSFORMER BLOCK DIAGRAMCIRCUIT BOARD LAYOUT POWER AMPF-20B DISASSEMBLY PROCEDURE1.Pre-MainUnit Time required about 2 min 2.Speaker Time required about 2 minTime required about 3 min 5.Power Transformer Time required about 4 minF-20B 4.MAIN 2/2 Circuit Board F-20B CIRCUIT BOARDSINSPECTIONS IC BLOCK DIAGRAM2.Power supply 3.Inspection procedureF-20B CONTENSPARTS LIST BASS AMPLIFIER20 Pre-MainUnit OVERALL ASSEMBLY10 Overall Cabinet Assembly F-20BNew parts F-20BDESCRIPTION REMARKSPRE-MAINUNIT V 6 9 5 4 8 0 0 Chassis F-20BF-20B ELECTRICAL PARTSHF456330 F-20B5 F-20B OVERALL CIRCUIT DIAGRAMABCDEFG P.1 F-20B