Dynatuner FM-1 Instructions For Assembly Alignment Operation - Page 6

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ASSEMBLY .

INSTRUCTIONS

When all of the one-half watt resistors are in

place, put the chassis bottom plate over them to

hold them in position and carefully turn the board

and bottom plate upside-down. Solder each lead

with a small amount of solder. The solder should

flow smoothly all around the lead onto the copper.

Cut off all excess leads. See detail A.

After soldering, there should be no space between

the bodies of the resistors and the top of the P

board. If there is, the resistor should be gentl

pressed to the board while the soldered leads are

reheated, until the resistor is flush with the board.

NOTE CAPACITOR BODY

TOUCHES BOARD.

DETAIL "8"

2(0Support the board as in step 1. Insert the

£J

nUcro-

henry choke ll2'and the heater choke I:S. Wert

all the one watt resistors. Insert the 2.2 mmfd

tubular capacitor

GJ:1"

(red, red, white and gray

dots>. Invert the board and solder each lead of these

components and trim off the excess.

3(0 Insert the two nine pin sockets. Note the location

of the flat side of each socket. Be certain that each

tab goes into its hole and does not bend over on top of

the board. Seat each socket firmly to the board and

then solder each pin an.d the center ground pin.

4 (

to{

Referring to the pictorial diagram and the values

marked on the individual capacitors, insert all the

NOTE BODY OF RESISTOR IS PRES$EO TIGHT

TO BOARD, MAKE SOLDER FLOW S"'OOTHLY

FROM LEAD TO COPPER. SNIP OFF EXCESS

LEAD CLOSE TO SOLDER.

SNIP OFr EXCESS LEAD

-f}

CORRECT SOLDER

( (

00".""

~»)}

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DETAil "A"

Be sure enough heat reaches both the copper

(J)n

the board

and the wire to be soldered to make a smooth solder junc-

tion. When making connections to the eyelets, be sure that

the solder flows from the wire to the cyelet to the board, so

that the eyelet is soldered to the wire and to

~he

board at

the same time. When installing components, be careful not

to cover up the identifying numbers. Avoid getting solder

on the outer

edge of the boards. This area contacts the

chassis when the boards are mounted and solder splashes

here will prevent a uniform contact.

You will note that on each etched circuit board all of

the component positions are diagrammed on the top of the

board (the side without the copper). The identification

symbol for each component is marked between the holes.

into which its leads will be inserted. Resistors may be

identified by comparing them with the color code provided

on the parts list. Each disc capacitor is marked with its

value and any special characteristics. Other special com-

ponents will be identified as they are called for in the

assembly process.

Assembly of the R..F. circuit board PC-7

(0'

Position the PC-7 etched circuit board in front of

you according to the pictorial diagram. Support the

board over an open box or between two objects so

that the leads from the components may project

through. Insert all of the one-half watt resistors in

their places on the circuit board. To bend the leads

of each resistor to the correct shape, hold it between

the thumb and forefinger of one hand and bring the

thumb and forefinger of the other hand just across

the ends of the body, bending the leads as you do so.

See detail

It will help in rechecking your work

to orient the color codes of all resistors uniformly.

YOLI will first assemble the two etched circuit boards

PC- 7 and

PC-B,

and then mount these and the other com-

ponents on the chassis and complete the wiring. The Dyna-

tuner's use of etched circuit boards, onto which most of

the parts are mounted, greatly simplifies your aSsembly of

the kit, and contributes strongly to its outstanding per-

formance. Close attention to the suggestions made here

will enable you to realize its fullest capabilities.

Before starting assembly of the etched circuit boards,

observe detail A. A GOOD SOLDERING JOB IS ESSEN-

TIAL TO THE PERFORMANCE OF YOUR TUNER.

Soldering to etched circuit boards is no more difficult (and

in some ways much easier) than conventional point-to-point

wiring. If any difficulty is experienced in attempting

solder to the copper sheet which is bonded to the board,

light rubbing with an ink eraser can clean the copper to

simplify the process.

INCORRECT SOLDER

CONNECTION

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