Heathkit HW 5400 Manual
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Page 1
HEATHKIT"
MANUAL
HEATH COMPANY - BENTON HARBOR, MICHIGAN
Page 15
Heathkif
Page 18
A GOOD SOLDER CONNECTION
|_-_----_--_-_-__'1
I scum? FLOWS ouiwnwn
AND GRADUALLY ELENDS
WITH IHE FOll AND
lHi LEAD
I
I ion
| .cm
I
I When you heat the lead and the circuit board foil at the same
I time, the solder will flow evenly onto the lead and the foil.
H
Oj/ Posmowtu
/
<
1 ,'
,« sowuzmc
mow
/
I/
//
CORRECILY
The solder will make a good electrical connection between I
Lthe lead and the foil.
POOR SOLDER CONNECTIONS
F-_-__-_-?_-_-
SOLDER DOES NOT FLOW
ONIOLEAD ADARK rosm ,
BEAD SURROUNDS ANDIN- / //
SULMESTHELEADFROM ROSIN x4, ,
wt CONNECIION // xSOLDERING
/},,\ lRON
port ,I// POSITlONED
o lNCORRtClLV
-\ A \z a
When the lead is not heated sufficiently, the solder
will not flow onto the lead as shown above. To cor-
rect, reheat the connection and, if necessary, apply a
small amount of additional solder to obtain a good
connection.
,4 .'SOLDERING
SOLDERAPPIARSTOFLOW ///,\ mm
INWARDANDSLVONIOP X, posmomo
of in: ion ,g/X INCORRECILV
lo /wosm
\-\ \ il\ ._
When the foil is not heated sufficiently the solder will
blob on the circuit board as shown above. To correct,
reheat the connection and. if necessary. apply a small
amount of additional soldEr to obtain a good connec-
tion.
L_________
SOLDER BRIDGES
A solder bridge between two adjacent foils is shown
in photograph A. Photograph B shows how the con-
nection should appear} A solder bridge may occur if
you accidentally touch an adjacent previously sol-
dered connection. it you use too much solder. or if
you "drag" the soldering iron across other foils as you
remove it from the connection. A good rule to follow
is: always take a good look at the foil area around each
lead before you solder it. Then. when you solder the
connection, make sure the solder remains in this area
and does not bridge to another foil. This is especially
important when the foils are small and closetogether.
NOTE: It is alright for solder to bridge two connec-
tions on the same foil.
Use only enough solder to make a good connection,
and lift the soldering iron straight up from the circuit
board. If a solder bridge should develop, turn the
circuit board foil-side-down and heat the solder be-
tween connections, The excess solder will run onto
the tip of the soldering iron. and this will remove the
solder bridge. NOTE: The foil side of most circuit
boards has a coating on it called "solder resist." This
is a protective insulation to help prevent solder
bridges.
Page 30
Page 28
Heatl'lkit
FILTER
CIRCUIT BOARD
03..ng
-CI-
av E
[33113: 1 at:
NI-t
Q
PICTORIAL 2-8
Refer to Pictorial 2-8 for the following steps.
( ) Connect the common ohmmeter lead to the
bare circuit board foil at the indicated comer
mountinghole.
[ ) Set the ohmmetertoR x 10K.
Use the positive ohmmeter probe to check for the in-
dicated resistances at the following plug pins:
[ ) P551, pin 1. Check for infinity. If the reading is
incorrect, check transistor Q551 and its as-
sociated components.
( ) P551, pin 2. Check for infinity. If incorrect.
check for correct installation of diode D552.
NOTE: In the-following steps, the instructions will be
abbreviated, as in the next example: The step will list
I
CONNECT COMMON
OHMMETER LEAD
TO FOIL AT
THIS CORNER
a test point, followed by the correct resistance read-
ing, and [if applicable) a component to check if the
reading is incorrect.
( ) P551-3. Infinity. Check Q551.
[ ) P553-1. Charge to 50 kn or greater. Check
Q555 orQ556.
( ) P553-2. Charge to approximately 30 k9,. Check
Q554 or Q5555.
[ ) P553-3. Infinity. Check D554.
( ) P553-4.Infinity.CheckD554.
( ] P553-5. Charge to 60 kn. or greater. Check
. Q554.
This completes the Initial Tests" of your filter cir-
cuit board. Disconnect the ohmmeter leads from the
circuit board. Then set the circuit board aside until
it is called for later during the assembly of the chas-
sis. Proceed to Display Circuit Board.
Page 81
Heathkit W79
m.
( ) L301: 100 H choke (#45-604,
brn-blk-brn) at bole T. Position
one end 1/16 above the board.
Cut its top lead to 1/4 and bend
it to form a loop. Be careful not
to pm any stress on the leads of
this choke.
NOTE: Solder each wire or compo-
nent lead to the foil as you install it.
Then cut off the excess lead end. Posi- l. 3 O 1
tion each component the indicated
distance above the board before you A GA l N S T
solderthe connection. B 0 A R D
( ) D302: 1N4149 diode (#56-56).
The lead at the bended end goes
inlo board hole 40.
{ ) R301: 10000 (bm-blk-red). Cut
one lead to 1/4" and bend it to
form a loop. Then solder it to the
choke.
When a wire is called for in this Picto-
rial, cut the white solid wire to the
specified length and remove 1/4" of in-
sulation fromeach end. RES I STOR
DO NOT
S 0 L D E R
[ ) 1-1/4 wire into board hole 80.
[ ) 2-1/4 wire between hoard holes
I,
[ ) l-3/8wireinloboard hole +12.
[ ) R312: 100!) (bm»blk-brn] into
holeOUT.
( )LSOZ: ZnH variable inductor
(#40-2066).
. PICTORIAL 6-4
Page 82
Page 80
m-
( ] Position one VCO chassis half as
shown
( )Position the circuit board as
shown. Then slide the circuit
board between the three ground
lugs on the chassis half.
( ) Keep the assembly in this posi-
tion and slide the other chassis
half into place. Note that the
flange on each chassis is on the
outside
( ) Fasten the two chassis halves to-
gether at the indicated corner
with a long #6 solder lug and a
#6 X 1/4" hex head sheet metal
screw, Push a 1-5/8 length of
medium heat shrink sleeving on
the solder lug. See Detail 6-5A.
[ ) Fasten the two chassis halves to-
gether at the other came! with a
#6 X 1/4 hex head sheet metal
screw.
£6 x1/4
HEX HEA
Dara»-
SHEET METAL
SCREW
[ ) Now turn the assembly over. and
solder the (our ground lugs to the
FLANGE
(> C.
ECU
ODD
-
D <
o - <
@
Heathkit
X 1/4"
HEX HEAD
SHEET METAL
SCREW
[ONO
06 SOLDER LUG
fail. I
MEDIUM
HEAT SHRINK 15/8"
SLEEVING \
PICIORIALS-S -
_ _-
Details-5A
o y. y, =/. 1 (moms; 2 3 4 5 6 7
l"°x°"|°1l l 1 1 I . 1 ,1 1 l
mynlvl , I I II [J T [III] A lli I'J'l Jlllll
O 5 I (CM) 2 3 a a e 7 I 9 v0 u m u H vs us V7
Page 83
Heathkif
m-
[ ) Position the assembly with tran-
sistor Q305 at this and as shown.
( ] Push the feedthrough insulator
(small and first] as tightly as pos-
sible into hole A.
Install the following .001 F ceramic
feedthrough capacitors as shown in
Parts A and B below.
A. Use a pencil sraser to clean
the outside surface around
holes C315, C314, C317. and
C316.
CLEAN
OUTSIDEJ. "AROUND
THE HOLE
B. Insert the longest and of the
capacitor into the hole and C 315
solder the entire skirt to the
chassis. Do not bridge solder
across the insulator.
SOLDER
ONLY
,/% THE SKIRT
, , TO THE
5 SHIELD
\
OUTSIDE
\
(I
INSULATOR;
[ ) CaistFeedthrough capacitor. PICTORIAL 6-6
[ ) C3141Feodthrou3h capacitor
[ ) C317:Feodthroughcapacitor.
[ ) C3162Feadthrough capacitor.
Page 92
Page 90
Heathkiti
6 gig/Kg [ ] Refer to Detail 7-5A and loosely mount the in-
PHILLIPS HEAD verter heat sink and a #6 solder lug to the
fi SCREW chassis at D as shown. Use a 6-32 x 3/8" black
HIENITE RSTIFlIRK , phillips head screw and a 6-32 nut. Tighten
) ,3 the nut only finger tight at this time. Be sure
[a 9 9| _ to position the heat sink so all four holes line
«6 SOLDER up with the four holes in the chassis.
@6 \ LUG
6'32 NUT ( ) Q501: Refer to Detail 7.53 and use the follow-
ing procedure to mount an MIE] 71 transistor
(#41 7-819] to the chassis and heat sink:
INVERTER
CHASSIS
1. Apply a thin layer of thermal compound
to each side of a transistor insulator.
2. Align the mounting hole in the transistor
insulator with the holes in the heat sink
and chassis at Q501. Then position the
Detail 7'5A 3/ insulator against the inside of the heat
sink as shown in the Pictorial.
Refer to Pictorial 7- 5 [Illustration Booklet, Page 8) 3. Position the bare metal side of the transis-
for the following steps. tor toward the heat sink and insert the
leads into their circuit board holes.
( ] Refer to the inset drawing #1 on the Pictorial
and prepare the outside surface around holes 4'40 x 3/8
C513, C514, and C515 by applying a small PHILBLLIAPCSKHEAD
amount of solder. Use plenty of heat to do this. 5 C REW
Do not get solder on the inside edge of the @
holes. BARE TRANSISTOR /
MJEl7l METAL INSULATOR
( ) 0513, C514, C515: Insert the longest end of T?.l17s.'§f£R 3le /3
the .001 P-F feedthrough capacitor into the \ / TAHEWAL
lsoles abndgolderléhe entire skirt to the chassis. g4 LOCKWA SHER \COM POUND
onot ri eso or across the insulate . ~
g r 4- 40 NUT® fl
CAUTION: Do not place any strain on a feedthrough / J:
capacitor when you connect a wire or a lead to them, CA R EFULLY BEND /\l;\/
as in the next step. To do so could damage the LEA D To F ' T
ceramic insulation.
[ ] Connect and solder the free end of the wire Detail 7-58
coming from circuit board hole +20 to feed-
through capacitor C514.
0 v. V: 3/4 1 UNCHES) 2 3 4 5 5
in»: eagle/317ml |
I l'rtvl l l I l
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Page 97
Heathkite
Page 95
CIRCUIT
M
01107
0110201105,
01109.01111,
01112
01104.01105.
Q1106
01101.01103
01101
R1144;
D1101.D1102
\
Y1102 \
P1103, P1105
P1101. P1102,
P1104. P1106.
P1107
S1101
KEY HEATH QTY. DESCRIPTION CIRCUIT KEY HEATH QTY. DESCRIPTION
No. Part No. Comp. No. No. Part No.
CAPACITORS TRANSISTORS-INTEGRATED CIRCUITUC)
Ceramlc NOTES:
31 2148 2 SpF 01119101126 1. Transistors and integrated clrcults may be marked for
31 21-147 1 47pF c1131 Identification In any otthefollowlngtourways:
31 21-171 1 650pF c1127
BI 21-140 1 .001 F (1000 pF) C1121 a. Part number.
B1 21-175 20 .0111F c1101, c1105.
01106.01107. b. Type number. (On integrated circuits, this raters
$122211}; only to the numbers; the letters may be dlflerent
C1114:c1115, missmg)
c111e,c1117,
611%. C1124. 0. Part number and type number.
c1125. c1129.
c1135_c1137, d. Part number wlth a type number other than the
C1138. c1139 one listed.
51 21-143 1 .05 [LF c1134
B1 21 -95 1 .1 uF 01132 2. Some of the ICs may be packed in conductive foam. Do
not remove these le from the foam until a step directs
you to install them.
Electrolytlc
D1 417-241 1 EL131transIstor
82 25-925 1 4.7 F c1133 91 417-801 5 MPSAZOtransletor
132 35-901 2 1010: 0112201128
32 25-883 1 471m c1135
D1 417-172 3 MP56521transistor
DZ 417-663 2 MFE131 transistor
'NDUCTORS D3 442-99 1 CD4016AEIC
61 40-1726 1 7mm L1101
02 45-604 1 100uHohoke(bm-blk-bm) U106
03 52-190 4 8.83 MHz lFtransIormer T1101.T1102. MISCELLANEOUS
T1100.T1104
E1 10-1071 1 50000(5kn)oontrol
52 56-20 2 1N295A diode (red-wht-gm)
85-2685-2 1 IFcircultboard
Ea 206-1332 1 Collshleld
E4 404-641 1 8.83 MHzcrystaIflIter
E5 432-969 3 5-pln plug
Es 432-1265 3 3-pin plug
E7 434-146 1 Phone socket
E8 434-296 1 14-pinlc socket
E9 47510 3 Ferrite bead
Page 123
Heathkit"
When you install a transistor. align its
flat or tab with the flat or tab outline on
the circuit board and insert the trans-
istor leads in their correct holes, Posi-
tion we transistor 1/4" above the board
and solder the leads to the foil. Then
out off the excess lead lengths. See De-
tail 1 O-5A.
( ) Q7122MPSA20 transistor-(#417-
801).
( ) Q713:MPSA20 transistor [#417-
801),
( ) Q719: 2N2369 transistor (#417-
154)
()Q718: MPS6521 transistor
(#417-172).
L-
( ) Q714: MPsAzo transistor (#417-
am).
[ 3 Q7152 MPSAZO transistor (#41 7-
801).
( ) Q708: MPSAZU transistor [#417-
am).
Q707: MPSAZU transistor (#417-
801).
A
[ ] Q7091MPSA20 transistor (#417-
301).
[ ] Q7111MPSA2011'snsistor[#417»
8011
rot/j
Ws 0.3
if? I:
M
sign
<9: $0
000L
350*
f%
El)
Q71 7: MPSAZO transistor (#417-
501).
l]
T:
G?
C1
$5
o-eC)
[ ] Q716: MPSAZO transistor (#417-
son.
( )Q702: MPsesn transistor
(#4174712).
( )Q701: MPSSSZl transistor
[#417472].
( ) Q7042 MPSAZO transistor (#417-
801).
Q7061 MPSAZO transistor (#41 7-
801).
(
Q703: MPSAZO transistor (#4 1 7-
801).
( ) Q705: M'PSAZO transistor [#417~
801).
PICTORIAL 10-5
Page 121
Page 165
Heathkitg
man-
( ) L651: 30 |LH toroid {#404011}
Install the coil as shown. Insert
the entire bare and of the leads
into the board. Solder the leads to
the foil and cut off the excess
lengths.
CENTER
LEM]
BOTTOM
LEAD
TOP
LEAD
( ) 5651: Phone socket. Solder the
two tabs and center lug to the toll
and cutoff the excess lengths.
BOTTOM
( I R658: 500 0 (#104140) control t
Bend the leads down 90" as
shown. Install the control. solder
the leads to the foil, and cut off
the excess lengths.
fle-
[ I 9651: 5-pin plug. Insert the short
pins into the board, Solder them
to the foil and cut off the excess
pings
o y. y? 5/. 1 (INCHES! 2
PICTORIAL 13-2
Page 163
m-
( I 3/4"small bare wire in hole A.
Solder one end of the wire to the
foil. The other end will be con-
nected latert
NOTE: When you install each of the
following transistors. position the flat
on the transistor over the outline of the
flat on the circuit board Then insert
the leads into the circuit board holes
and solder them to the toil, Cut off the
excess lead lengths.
FLAT
FLAT
Four lvaSAOS (#41 $864) transistors:
( ) Q552
( I 0653
[ ) Q651t
( ) (2654
NOTE: When you install electrolytics.
be sure to match the positive [ + J mark
on the capacitor with the positive [+)
mark on the circuit board, or match
the negative ( - ) mark on the capacitor
with the negative mark on the Circuit
board.
NEGATIVE
POSITIVE
H)
MARK
( ) C655: 7 uF electrolytic. Solder
the leads to the foil and cut off the
excess lengths.
Page 173
Heathkif)
Page 171
( ) T1202: Similarly, solder a small transformer
form at location T1202 on the power amplifier
circuit board. Be sure the #85-2590 circuit
board is next to holes C, D, E, F, and G on
the power amplifier circuit board.
( ] T1203: Solder the remaining small transformer
form at location T1203 with its #85-2690
board next to holes H, I, I, K, and L on the
power amplifier circuit board.
NOTE: The large transformer form will be installed
later.
[ ) Prepare a 5" small red stranded wire.
NOTE: When you wind a wire through a transformer
form, the wire should not be too loose, however.
you must be careful not to pull the wire too tight
against the ends of the brass tubes. These brass tube
ends can be quite sharp, and could cut the insulation
on the wire. This could cause shorted turns" which
would keep your Transceiver from operating prop-
erly. If the wire appears to be too long when you
finish winding the transformer, you can shorten the
free end as necessary.
[ ] Refer to Detail 14-3C and solder one end of
the prepared red wire into hole AA in the
power amplifier circuit board and cut off the
excess wire length.
( ) Again refer to Detail 14-3C and wind 2 turns
on the transformer form at location T1201, by
folloWing the numbered sequence [1 through
5). Then solder the free end of the wire into
hole BB in the power amplifier circuit board
and cut off the excess wire lengths.
( ) Prepare a 3" small red stranded wire and a 3"
small black stranded wire. Do not add solder
to the ends of these wires yet.
( ) Twist the bare and at one end of the red wire
and black wire together and melt a small
amount of solder on them. Then melt a small
amount of solder on the remaining two wire
ends.
0 VA A /4 1
Ha 3/3 6/81 we]
[I'Yvrpnvl
0 5 I (cm 2 :I 4 5 a
(memes) 2
iml I l n
,. .
Detail 14-3C
[ ] Refer to Detail 14-3D (Illustration Booklet,
Page 19] Part A and solder the combined and
of the red and black wires into hole E of the
power amplifier circuit board.
Refer to Part A of the Detail and wind the black
wire 1 turn on the transformer form at location
T1202 by following the numbered sequence [1
through 3) and arrow direction. Then solder its
free end into hole F.
( l
9
NOTE: If you can not get a wire through the brass
tube, carefully push a large bare wire through the
tube to make a passageway for the wire.
( ) Refer to Part B of the Detail and wind the red
wire 1 turn on the transformer form and solder
its free end into hole D.
[ ) Remove 3/16 of insulation from both ends of
two 1-5/8 small white solid wires. Then bend
a small loop at one end of each wire.
( ] Refer to Part C of the Detail and out both leads
of a 22 D. (red-red-blk) 1/4-watt resistor to 3/16"
long. Bend small loops in each resistor lead and
connect the looped end of a white wire to each
resistor lead. Bend the loops on the wire ends
and the resistor closed. Make these connections
as small as possible.
Now solder the connections of the resistor and
white wires. Do not use any more solder than
necessary to make a good Connection.
Page 188
Page 186
Heathkit
STEP-BY-STEP ASSEMBLY
Refer to Pictorial 15-1 (Illustration Booklet. Page 30)
for the following steps
( ] Position the rear chassis as shown in the Picto-
rial. (Note the location of the larger hole near
the center of the top edge in the chassis.)
[ ) Refer to Detail 15-1A and temporarily mount
the 2-wafer. 8-position rotary switch (#63-
1387) onto the rear chassis at hole RE. Use a
large control lockwasher (thin), a large control
flat washer, and a large control nut. Be sure to
mount the switch so its lugs are positioned as
shown in the Pictorial.
( ] Refer to the inset drawing on the Pictorial and
bend the pairs of lugs at each position on switch
. 8-POSlT10N
SWIB and C so they are touchlng. Whenever ROTARY SWITCH
you connect a wire to these lugs 1n the follow- 63-1387)
ing steps, be sure to connect the wire to both
lugs.
\ (fill?) LARGE CONTROL
* S H E R
l ) Cut four 1" small bare wires. Use these bare \ GLOC K W"
wires in the following steps.
E |: Hg!)
NOTE: In the following steps, (NS) means not to sol-
der the connection because you will add other wires
later. -"S with a number, such as (8-2], means to sol-
der the connection. The number following the S-
tells you how many wires should be at the connec-
tion. This helps you check your work for errors as you
LARGE CONTROL
FLAT WASHER
LARGE CONTROL
go' NUT
( ) Connect a 1" bare wire between switch SWIB
lugsB (8-1] and 7 [NS].
( ] Connect a 1 bare wire between switch SWIB
lugs 6 (S-1] and 5 [NS].
( ] Connect a 1" bare wire between switch SWIC
lugs 10 (NS) and 11(8-1).
Detail 15-1A
( ] Connect a 1" bare wire between switch SWIC
lugs 12 (NS) and 1(8-1).
[ ) Cut a 5" large bare wire.
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Page 195
Heathkit
Page 193
Refer to Detail 15-3D [Illustration Booklet. Page 31)
for the following steps.
I ) Drop the door into the escutcheon as shown.
( ) Place the front panel over the escutcheon.
( ) Mount the escutcheon to the front panel with
five push-on nuts. Position each push-on nut
as shown. NOTE: Use two screwdrivers to
push these nuts onto the front panel studs.
Proceed to Mounting Display Circuit Board".
With Keypad Accessory
( ] Position the keypad circuit board with the foil
side down and the large hole in the upper right
corner as shown in Detail 15-3E.
[ ] Cut seven 1 lengths of small bare wire [use
the wire supplied with the Accessory kit).
NOTE: When you install these wires, keep the board
flat against your work surface so the wires cannot
protrude through the holes. Solder each wire to the
small foil pad as you install it.
( ) Refer again to Detail 15-3E and install the bare
wires in holes Q through W.
( 1 Carefully peel the backing from the keypad
label. Then press the label onto the front of
the escutcheon as shown in inset drawing #2.
( ] Position the door as shown in Detail 15-3C
[note the location of the hinge bosses). Then
carefully peel the backing paper from the door
label. Line up the edges of the door label with
the edges of the door; then press the label onto
the door.
Refer to Detail 15-3D for the following steps.
[ ) Drop the door into the escutcheon as shown.
( ] Place the front panel over the escutcheon.
EMPORTANT: Do not touch the conductive rubber
pads on the back of the keypad. Dirt or oil from your
fingers can cause the buttons to become intermittent.
( ) Refer to the inset drawing and lay the keypad
in place so the buttons insert properly into the
escutcheon.
( ) Refer again to the inset drawing and lay the
keypad circuit board on the keypad. Make sure
the two bosses on the keypad seat into the two
small holes in the board. Fasten the board and
keypad with three push-on nuts [supplied
with the accessory). Be sure to position the
nuts as shown. NOTE: Use long-nose pliers to
squeeze the tabs on the nuts together while
you install the these nuts.
[ ] Install the remaining two push-on nuts to fas-
ten the front panel to the escutcheon. Be sure
to position these nuts as shown.
NOTE: If you installed the Keypad Accessory. you
will have two push-on nuts left~over. These will not
be used.
Proceed to Mounting Display Circuit Board".
Mounting Display Circuit Board
( ) M1: Position the meter in its cutout in the es-
cutcheon.
NOTE: When you perform the next step, be careful
not to damage the display tube or the lamps that
are attached to the display circuit board.
( ) Carefully peel away any paper or film that may
be on the window. Then drop the window into
the indicated cutout in the escutcheon. Then
mount the display circuit board onto the front
panel. Use five #4 X 1/4" self-tapping screws.
Be sure the shafts of the four large controls
on the circuit board enter their corresponding
holes in the front panel. NOTE: If you have
installed the Keypad Accessory, make sure the
seven hare wires are inserted into their respec-
tive holes in the display circuit board as
shown in inset #3. Do not solder these bare
wires to the display circuit board yet.
1" BARE WIRES
-l-l-l+JI-l-l-,
Detail 15-3E
7
O i/_ y] 54 1 (memes) 2 3
L151 39 l a 7("l 41 l 1 I 1 l J
V 'Y 'I ' I 1 1i' I l rfi I '
O 5 ' (cm 2 a n 5 s 7 a
6
l l 1 l l l l l
I 1 fl Wr I f
m u 2 3 u w 5 n
Page 245
Page 243
Heathkiti
( ) Refer to Detail 16-13C (Illustration Booklet, [ ) Push socket P408, coming from the main and
Page 53] and mount the RF circuit board to
the chassis as shown. Use five 6-32 x 3/8 hex
head screws. 8 #6 lockwasher, a 6-32 nut, and
four long #6 solder lugs. Slide a 1-1/4" length
of medium heat shrink sleeving onto each of
the solder lugs.
Temporarily remove the knob from the shaft
of switch SW1A.
Loosen the control nuts that secure switch
SWlA to the front panel and switch SW1B/
SW1C to the rear chassis.
Center the 7 shaft between the shafts of
switches SWIA and SW1B/SW1C. Then slide
the shaft coupler on one end of the 7 shaft
half way onto the shaft of switch SW1A.
Tighten the setscrew against the 7 shaft first;
then tighten the other setscrew.
Use the following procedure to align the
switches on the RF circuit board to SW1A:
1. Connect an ohmmeter between circuit
board plugs P410 pin 1 and P411 pin 1.
NOTE: Do not connect the ohmmeter to
sockets P410 and P411 on the harness.
2. Rotate the body of switch SW1A (not the
shaft] both directions and note that the
ohmmeter shows a short circuit for a de-
finite range.
3. Rotate the body of switch SWIA so it
is centered in the short circuit range, as
indicated on the ohmmeter. Then
tighten the control not on switch SWIA.
4. Reinstall the knob on the shaft of switch
SW1A. Be sure the knob pointer is at 80.
Slide the remaining shaft coupler half way
onto the shaft of switch SWIB/SW1C. Tighten
the setscrew against the 7" shaft first; then
tighten the other setscrew.
Tighten the control nut on switch SW1B/
SWIC.
Push socket P411, coming from the main har-
ness, onto RF circuit board plug P411. Be sure
the green wire in this socket is at plug pin
1.
cable harnesses, onto RF circuit board plug
P408. Be sure the white-green wire in this
socket is at plug pin 1.
Cut a 1 small bare wire. Then connect and sol-
der one end of this wire to the shield wires of
the shielded cable in socket P407 [coming from
the main and cable harnesses). Be careful not to
burn any of the other wires in this socket with
your soldering iron.
Push socket P407 onto RF circuit board plug
P407. Be sure the violet wires in this socket are
at plug pins 1 and 2. Then solder the free end
of the bare wire coming from this socket to the
top of the RF circuit board shield in the area
shown.
Remove the jumper wires in socket P403 com-
ing from the main harness, if this has not al-
ready been done. Then push socket P403 onto
RF circuit board plug P403. Be sure the gray
wires in this socket are at plug pins 1, Z, and 3.
Cut a 1" small bare wirei Then connect and sol-
der this wire to the shield wires of the shielded
cable in socket P406 [coming from the cable
harness). Use the same method as you did ear-
lier.
Push socket P406 onto RF circuit board plug
P406. Be sure the inner lead of the shielded
cable in this socket is at plug pin 1. Then solder
the free end of the bare wire coming from this
socket to the top of the RF circuit board shield
in the area shown.
Use the long #6 solder lugs along the bottom
edge of the RF circuit board to secure the har-
nesses in place as shown in the Pictorial. Short~
en these solder lugs as necessary.
Push socket P409. coming from the main har-
ness, onto RF circuit board plug P409. Be sure
the white-green wire in this socket is at plug pin
1.
Remove the jumper wire in socket P410 coming
from the main harness, if this has not already
been done. Then push socket P410 onto RF cir-
cuit board plug P410. Be sure the white-gray
wire in this socket is at plug pin 4. Save the
jumper wire for use later.
Push socket P405. coming from the main har-
ness, onto RF circuit board plug P405. Be sure
the red wire in this socket is at plug pin 1
o % IA 3/. 1 (INCHES) 2 3 4 5 T 1/
"s 3" | 5" 718 l 1 | l 1 l I l l J t l 1 l l l 1 l 1 . | l I
[WW "I I l I I l' I T e I ' I I ' I I I I T I I I '
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Page 256
Page 254
Heathkite
NOTE: In the following step, if the voltage indicates
a drop in the pointer, switch the voltmeter leads,
or switch to the opposite meter mode.
[ ] Turn the Transceiver on.
[ ) Set your voltmeter to read 15 VDC.
( ] Connect the common voltmeter lead to the
chassis.
( ) Touch the positive voltmeter lead to terminal
strip RA lug 1. Write down the meter indica-
tion.
[ ) Press the TUNE pushbutton. Then touch the
positive voltmeter lead to feedthrough
capacitor C1227. After the power stabilizes
[about 30 seconds], adjust BIAS control R1215
on the power amplifier circuit board until the
voltmeter indicates exactly 2 volts less than
it did in the above step [at terminal strip RA
lug 1) Then release the TUNE pushbutton.
( ) Turn the Transceiver off and disconnect the
test resistor.
NOTE: Be careful not to break the feedthrough
capacitors when you connect wires to them in the
following steps.
[ ) Remove an additional 3/8" of insulation (total
5/8) from the free end of the large red wire
coming from rear chassis terminal strip RA.
Then refer to Detail 16-18A and connect and
solder this end of the wire to feedthrough
capacitors C1227 and C1228 on the PA assem-
bly.
( ] Refer to Pictorial 16-19 and position the PA
assembly against the rear of the chassis as
shown. Then secure the assembly to the chas«
sis with four 6-32 X 3/8 hex head screws. Be
careful not to pinch any wires between the PA
assembly and the chassis. Also make sure
none of the bare ends of the red wires touch
the chassis.
PA
ASSEMBLY
PICTORIAL 16-19
Page 262
GUSTOMER SERVICE
REPLAGEHEHT PARTS
Please provide complete information when you request re-
placements lrorn either the rectory or Heath Electronic Cen-
ters.Beoefleintoincludethe mmpannumberexactlyasit
appears in the parts list.
ORDERING FROM THE FACTORY
Print all at the iniorrnatton requested on the parts order term
lurrdehed with this product and mail it to Heath. For telephone
orders (parts only) dial 616 902-3571. if you are unable to
locate an order ionn, write us a letter or card including:
it Heath pan number.
0 Model number.
0 Date of purchase.
0 Location purchased or invoice number.
0 Nature ol the detect.
0 Your payment or authorization lor COD shipment of pans
not covered by warranty.
Mail letters to: Heath Company
Benton Harbor
MI 49022
Ann: Parts Replacement
Main original parts until you receive replacements
Partathatahouldhareturnedtothatactorywlltballeted
on your packing allp.
OBTAINING REPLACEMENTS FROI
HEATH ELECTRONIC CENTERS
For your convenience. "over the counter" replacement parts
are available irom the Heath Electronic Centers listed in your
catalog. Be sure to bring in the original part and purchase
Invoice when you realest a warranty replacement horn a
Heath Electronic Center.
recumcar. CONSULTATION
Need help with your kit? felon-Service? - Construction? -
Operation? - Call or write ioraeslstance. you'll iind our Tech-
nlcal Consultants eager to help wflh just about any technical
problem except "customizing" tor unique applications.
The effectiveness oi our consultation service depends on the
information you tumlah. Be sure to tell us:
I The Model number and Series number from the blue and
white label.
0 The date at purchase.
- An exact description at the difficulty.
' Everything you have done in attempting to correct the prob-
lem.
Also include switch positions. connections to other units.
operating procedures voltage readings. and any other inter-
mation you lhinir might be helptul.
.Plaaaedo not send parts for testing. unless this is specifiv
catty requestedby our Consultants.
Hints: Telephone tratllc is llghtastal midweek'- please be
sure your Manual and notes are on hand whenyou call.
Heathkit Electronic Center taciIties are also available for tele-
phone or "walk-in" personal assistance.
REPAiR senvrce
Service iacliltiea are available. if they are needed to repair
your completed tut. (Kits that have been modified soldered
with pasta iluit or acid core solder. cannot be swepted tor
repair.)
it it is convenient. pereorially deliver your ititto a Haemitlt
Electronlccenter. Forwerrarnypemnplecanienheup-
ply-copyolthelnvoiceorsaleeellp.
It you preier to ship your kit to the lactory. sited! a loner
containing the following intormalion directly to the unit:
0 Your name and address.
I Data at purchase and invoice number.
0 Copies at all correspondence relevant to the service at the
idt.
e A brief description of the diillcuity.
I" Authorization to return your tilt COD tor the service and
shipping merges. (This will reduce the possibility of delay.)
Check the equipment to see that all screws and parts are
secured. (Do not include any wooden cabinets or color televi-
sion picture tubes as these are easily damaged in shipment
Do not include the kit Manual. l Place the equipment in a strong
carton with at least THREE lNCHES otresillem pacidng mate-
rial (shredded paper. excelslor. etc.) on all adee Use addh
ilonal positing material where there are protrusions (control
Etidts. large knobe,>_etc.). If the unit Weighs over 15 lbs. place
this canon in another one with 3/4" at packing material bet-
ween the two.
Seal the canon with relntorced gummed tape. tie it with a
strong cord. and merit it "Freak" on at least two sides..Ra-
member. the carrier will not accept liability tor shipping dam-
age it the unit is insufficiently neared. Ship by prepaid express.
United Parcel Service. or insured Parcel Pom to:
Heath Company
Service Department
Benton Harbor. Michigan 49022