Dynatuner FM-1 어셈블리 정렬 작업 지침 - 페이지 8

{카테고리_이름} Dynatuner FM-1에 대한 어셈블리 정렬 작업 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. Dynatuner FM-1 20 페이지.

페이지 인쇄

(--1'

Insert all of the disc capacitors. As before, the leads

of these capacitors may be bent slightly to hold

them in place, but be careful that no "bridges" are

formed to adjacent parts of the circuit. Solder all

of these capacitors.

5(0'Install the mylar capacitor C29 near the V7 socket.

Solder both leads and cut off the excess.

6( -{'Insert the vertically mounted .22 mfd 200 volt

tubular capacitor C31 in its two eyelets. Solder both

eyelets.

7(vf' Insert the remaining IF transformers 1'2,1'3 and 1'4

(all 432001). Follow the location of the slot at the

top of each transformer as shown in the pictorial.

Solder all mounting tabs and all lugs. Avoid exces-

sive solder, which may flow into the transformer and

damage it. Make sure the chokes L6 and 1.8 do not

touch the transformers. The discI'imina tor trans-

former 1'5 will be mounted later.

8(vr-Insert ground straps in each of the sockets. Note the

orientation of the offset. Solder these ground straps.

9 (6'stall the pilot light socket in the holes indicated.

Observe that the connecting tab from the socket

center contact goes into the hole adjoining eyelet

fl20.

Do not install it backwards! Solder both tabs.

Chassis Assembly

1 (

~Hold

the PC-7 board as shown in the pictorial, with

the J.F. transformer away from you, and carefully

pick up the tuning capacitor Cl, holding it so that

the shaft points away from you. Be particularly

careful that you do not touch the semicircular

copper and aluminum colored plates of the capacitor.

If these are bent, even slightly, it will be difficult to

get the tuner to track accurately across the dial

when you come to the alignment procedure. Now

insert the small tabs which protrude from the bottom

of Cl into the corresponding five holes in the top of

PC-7. Be careful capacitor C7 is not damaged. This

fit is especially snug, but be sure that the capacitor

is fully seated against the board. The two threaded

studs of the capacitor will also engage the board.

Ii'

Mount the PC-7-Cl assembly on the top of the

chassis, locating it by the four threaded studs of Cl.

Install four sets of #6 (medium size) lockwashers

and nuts on these studs but do not tighten them.

/!'

~sten

the PC-7 board in place with five sets of #4

(smallest size nickel plated) hardware. Install the

screws from the top, and secure with a lockwasher

../J

c.)

under each nut. Tighten these, and also tighten the

,......., /

nuts on the capacitor studs.

'0(

Mount the tuning capacitor shield can, using three

(

./..;,'

sets of #4 hardware. Make sure the shield lies be-

tween socket V2 and capacitor C6. The tab of the

shield is fed through the hole in PC-7 for the mOWlt-

ing tab of 1'1. Solder both of these tabs to the board.

~Mount

the J.F. circuit board PC-8 on the top of the

chassis. Note that the mounting holes in the board

are not evenly spaced and the board can.. only be

mounted in one position. Fasten with eight sets of #4

hardware.

6 (

Mount the quadruple section electrolytic capaci-

tor C32 in the center of the chassis. Note the

identifying marks at each lug of the capacitor (semi-

circle, square, triangle, and blank) and orient the

capacitor according to the pictorial diagram. Fasten

it rigidily in position by twisting the four mounting

lugs /,:1 turn with a pair of pliers.

701 Mount the on-off switch on the front of the chassi .

Use two !!4 screws. Lockwashers and nuts are not

necessary as the holes in the switch are threaded.

Follow the position of the switch lugs shown in the

pictorial.

Mount the three screw terminal strip with two sets

of #4 hardware. Note that the terminal strip is

mounted on the outside of the rear fiange of the

chassis. Refer to the pictorial for proper orientation.

9(~

Mount the fuse holder in the special

shaped hole.

The rubber washer fits between the shoulder and the

outside of the chassis. Fasten in place securely, but

not tighten excessively.

M'Mount the AC outlet with two sets of

hardware.

11 (

~ount

the two audio output sockets using two sets

114

hardware for each. Note the orientation of the

ground (outside) lugs in the pictorial.

12(V"'Mount one of the two nine pin sockets which have

mounting flanges, in the center of the chassis. Note

the location of the blank space between the pins in

the pictorial. The socket is mounted on top of the

chassis with two sets of #4 hardware.

13(~Mount

the multiplex adapter cutout cover plate on

top of the chassis using four sets of

114

hardware.

14 ((.)""install the 3 rubber grommets. The larger one i.

inserted in the round hole at the rear of the chassis, .

and the other two are fitted into the round holes in

/the dividing partition in the middle of the chassis.

15( ) Feed all the power transformer (PA-509) wires

through the one-half inch hole as shown in the

pictorial. Fasten the transformer in place with four

sets of #8 hardware (the largest size). Mount the

three lug terminal strip on the power transformer

mounting screw (between the hole for the trans-

former leads and the nine pin tube socket) as shown

in the pictorial, and secure it with the same lock-

washer and nut.

On completion of this assembly, recheck all hard-

ware to make sure that all components are securely

in place.

Chassis Wiring

Unless otherwise specified, the insulation should be

stripped from each length of wire for a distance of

each end prior ,to installation.

1 (

~trip

a 2.Yz" piece of wire bare. Feed one end through

the rear tab of the tuning capacitor Cl that projects

through the steel chassis, and then through the other

tab, and over to the first tab that projects through

the PC- 7 board. See pictorial. Solder all three points

and trim off the excess.

2(0"'Solder all four of the remaining connecting lugs

the tuning capacitor which project through PC-7.