Motorola ck 67 a service manual

Page 1

MOTOROLA

GENERAL INFORMATION

Truck and van type all-transistor
superheterodyne AM radio for
standard broadcast reception; this
receiver operates from a 12 volt
negative ground system. It is de-
signed for custom installation in
1967 Chevrolet and GMC trucks, It
contains 6 transistors, 2 diodes, 1
Zener diode and uses an 8 ohm
speaker system.

TO SET PUSHBUTTONS

Unlock pushbutton by pulling it out
about 1/2" forward of its normal

position. Tune in station and lock
the pushbutton to the station by
pushing it in firmly.

SERVICE NOTES

1. Ha battery eliminator is used as

auto radio

MANUAL 68P64994A77

MODEL CK67A

2. When replacing a power output
transistor. remember to use the
transistor specified inthe parts list;
coat both sides of the transistor in-
sulator with DC-4 grease (Motorola
Part No. ilk/1490487) and securely
tighten the transistor mounting
screws. When replacing all other
transistors, use long nose pliers as

receiver has plating on both sides;
the exposed side (opposite compo-
nents) contains the actual circuitry
while the plating on the component
side contains primarily 5- points.

Servicing techniques applicable to
this model can be found in the fol-

apower source in place of a battery, a heat sink, i.e., grasp transistor lowing Motorola publications:
itmustbe wellfiltered and regulated, leads close to transistor base with HProfitable Transistor Radio Ser-
Make certain that the AH lead is the pliers to dissipate heat while vicing (Motorola Part Number

connected to the positive (+) terminal

of the power source, otherwise
damage to the receiver may result.

soldering.

3. The plated chassis used in this

68P60011A53) and HA Discussion Of
Transistorized Car Radios"
(Motorola Part No. 68P64980A51).

" <
i '2 Ix
g g MOTOROLA AUTO RADIO WARRANTY SERVICE STATION PROCEDURE
«3
o .-
g 5 l. A Motorola Branded Modelis one booklet must be filled in by the form has been filled in, mail the
3 0 that has the Motorola name and is selling dealer at the time of retail pink and green copies to your
at E distributed to dealers through the sale. The Customer's Car Radio Motorola Distributor for payment.
_» 2 Motorola Distributor. Guarantee and Service Booklet must The yellow copy is to be retained in
; E Show that the radio is within the the Service Station file.
2. These models are guaranteedfor guarantee period to be repaired
7 all parts and labor, including re- under the Motorola Auto Radio 5. Defective parts forguarantee re-
,3 moval and re-installation (R S: R), Guarantee. pairs made are to be sent to your
3 for a period of two years from the Motorola Distributor for free re-
date of purchase. The following re- placement supported with the defec-
§ pairs are not covered under this 4. To obtain your labor allowance tive parts return tag, Part Number
a guarantee: the elimination of motor for the servicing of the customers 5413591808.

noise, tire static, electrical inter-
ference and faulty installation,

Charges for these repairs are to be

paid by the customer.

3. Before performing a guarantee
repair on a Motorola Branded Auto
you must first receive the
Radio Guarantee
The installa-
tion and model information on the

Radio,
Customers Car
and Service Booklet.

in-guarantee set, fill inthe Motorola
Guarantee Labor Claim, Part No.
68P60016A30. If you perform a
R & R serviceJ you are entitled to
the R in R allowance. If you only
repair the radio without R 8: R ser-
vice, you are entitled to the labor
allowance. However, ifyouperform
both R & R and the repair, then be
sure to indicate both on your claim
form for both allowances. After the

6. Only those service stations auth-
orized by their Motorola Distributor
can perform repairs within the
guarantee period on a no-charge
basis to the customer. If you are
not an Authorized Motorola Auto
Radio Service Station and you are
interested in handling this service,
please Contact your Motorola Dis-
tributor for complete details.

3 MOTOROLA INC.
: PART No.68P64994A77 9-67

9401 WEST GRAND AVENUE, FRANKLIN PARK,
PRICE 20 CENTS

I LLI N O | S
COPYRIGHT 1967 BY MOTOROLA INC. - PRINTED IN U.S.A.

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ALIGNMENT

Connect an output meter across the speaker voice coil. Set volume to maximum and tone to treble. Atten-
uate signal generator output to maintain 1 watt (2.8 volts across an 8 ohm load) on output meter at all times.

GENERATOR
GENERATOR FREQUENCY
STEP CONNECTION (400 Cycle 30% mod) TUNER SET TO ADJUST REMARKS
IF ALIGNMENT
1. To collector of 262.5Kc Hi end stop 1, 2, 3 Adjust for maximum.
RF amplifier thru & 4
.lmf and chassis
RF ALIGNMENT
2. Antenna recept- léch Hi end stop 5, 6 8: Adjust for maximum.
acle thru dummy 7
(see Figure)

NOTE: Do not perform Steps #3, #4, #5 and #6 unless the tuner has been tampered with or associated
components have been replaced. If necessary, remove the escutcheon, dial background and the
pilot light socket to expose the core screws. Before proceeding with Step #3, back the tuning cores
as far as possible out of the coils to eliminate their effect on trimmer adjustments.

3. Antenna recept- 1610Kc Hi end stop 5, 6 8: Adjust for maximum,
acle thru dummy 7
(see Figure)
4. " IZOOKC Tuner carriage 8, 9 & Adjust for maximum.
9/16" from hi 10
end stop
5. n 1610Kc Hi end stop 5, 6 & Adjust for maximum.
7
6. Repeat Steps #4 and #5 until no further increase; Step #5 should be last step. Then cement core

screws in place.

ANTENNA TRIMMER

7.

FRONT

ALIGNMENT POINTS LOCATION DETAIL

IO SlGNAL
GENERATOR?

PLUG TO FIT RECEIVER
ANTENNA RECEPTACLE

->ANTENNA

METAL SHIELD CAN
MUST HE ATTACHED
TO PLUG

DUMMY ANTENNA DETAIL

T0 RECEIVER

RECEPTACLE

Weak station
around 1400Kc

IF ALIGNMENT
DETAIL

Adjust for maximum with
car radio installed in car
and antenna/fully extended.

PARTS

Z
9
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04

05

.E 3

01 02 Q3

06