Motorola tm 327 m service manual

Page 1

auto radio MANUAL 68P64994A67

MODEL TM327M

MOTOROLA. INC.
PART No. 68P64994A67

MOTOROLA

GENERAL INFORMATION

Universal automotive type all»
transistor superheterodyne AM
radio for standard broadcast re-

ception; operates from 12 volt neg-
ative or positive ground system (by
simply changing apolarity reversing
plug on the radio). This receiver
contains a plated chassis board, 6
transistors, 3 diodes and includes
an 8 ohm speaker with provisions
for an external (rear) speaker.

This radio is of the compact, under-
dash type. In-dash installations,
however, can be made in many cars
with the use oftrimplate kits AK-ZZ3
or KMSST. Special knobs are de-
signed to give all installations a
custom look. The tone knob and the
dummy knob are reversible. For
in-dash installations, the knob is

service manua

eliminator is used as apower source
in place of a battery, it must be well
filtered and regulated,

2. When replacing a power output
transistor, remember to use the

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 B- points,

55d backwards" and provides a transistor specified inthe parts list; Servicing techniques applicable to
£10511 fit For under-dash installa- coat both sides of the transistor in- this model can be found in the
tions, the knob is used face-up" sulator with DC-4 grease (Motorola following Motorola publications:
and fills the extra Space Where Ehe Part No. 11M490487) and securely Profitable Transistor Radio Ser-
daSh would be (see parts location tighten the transistor mounting vicing" (Motorola Part Number
photo). screws. When replacing all other 68P60011A53) and "A Discussion Of

SERVICE NOTES

1, Make certain the "Aleadis con-
nected properly to power source,
i. e., check position of polarity re-
versing plug, otherwise damage to
receiver may result. If a battery

MOTOROLA AUTO

1. A Motorola Branded Modelis one
that has the Motorola name and is
distributed to dealers through the
Motorola Distributor.

transistors, use long-nose pliers as
a heat sink, i. e., grasp transistor
leads close to transistor base with
the pliers to dissipate heat while
soldering.

3. The plated chassis used in this

RADIO WARRANTY SERVICE

booklet must be filled in by the
selling dealer at the time of retail
sale. The Customer's Car Radio
Guarantee and Service Booklet must

Transistorized Car Radios"
(Motorola Part No. 68P64980A51).

4. REAR SPEAKER - The KMSS
(6 x 9" - 8 ohm Withfader control)
rear speaker kit can be used with
this radio.

STATION PROCEDURE

form has been filled in, mail the
pink and green copies to your
Motorola Distributor for payment.
The yellow copy is to be retained in

E E show that the radio is within the the Service Station file.
; a 2. These models are guaranteedfor guarantee period to be repaired
$ 2 all parts and labor, including re- under the Motorola Auto Radio 5. Defective parts for guarantee re-
2 I- moval and re-instailation (R in R), Guarantee. pairs made are to be sent to your
3 d for a period of two years from the Motorola Distributor for free re-
: 8 date of purchase. The following re- placement supported with the defec-
g 5 pairs are not covered under this 4. To obtain your labor allowance tive parts return tag, Part Number
< guarantee: the elimination ofmotor for the servicing of the customers 5417591808.
5 noise, tire static, electrical inter- in-guarantee set, fillinthe Motorola

ference and faulty installation. Guarantee Labor Claim, Part No. 6. Only those service stations authw
6 Charges for these repairs are to be 68P60016A30. If you perform a orized by their Motorola Distributor
Li? paid by the customer. R £2 R service, you are entitled to can perform repairs within the
E the R & R allowance, If you only guarantee period on a no-charge
3 3, Before performing a guarantee repair the radio without R 81 R ser- basis to the customer. If you are
g repair on a Motorola Branded Auto vice, you are entitled to the labor not an Authorized Motorola Auto

Radio, you must first receive the
Customers Car Radio Guarantee
and Service Booklet. The installa-
tion and model information on the

4-67

allowance. However, ifyouperform
both R 3: R and the repair, then be
sure to indicate both on your claim
form for both allowances. After the

PRICE 20 CENTS

Radio Service Station and you are
interested in handling this service,
please contact your Motorola Dis-
tributor for complete details.

9401 WEST GRAND AVENUE, FRANKLIN PARK. ILLINOIS
COPYRIGHT W67 BY MOTOROLA INC. - PRINTED IN U.S.A.

Page 2

ALIGNMENT

Connect an output meter across the speaker voice coil. Set volume to maximum and tone to treble. Atten-
uate signalgenerator 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 amp thru 8: 4
.l mf 8x chassis
RF ALIGNMENT
z. Antenna recept- 1610Kc Hi end stop 5, 6, 7 Adjust for maximum.
acle thru dummy 8: 8
(see Figure) 1
NOTE:

adjustments.

3, Antenna recept- 1610Kc Hi end stop 5, 6, 7
acle thru dummy E: 8
(see Figure)

4. u IOZOKC Tuner carriage 9,10, 11
.298 from hi 7%: 12
end stop.

5. " 1610Kc Hi end stop 5, 6, 7

k 8

6. Repeat Steps 4 and 5 untilno further incre

in place.
ANTENNA TRIMMER

7_ .- - --- Weak station 8

around 1400Kc

*THESE ADJUSTMENT POINTS ARE
ACCESSIBLE FROM FRONT OF RADIO

9
TOP BOT

DIAL SCALE BACKGROUND \

ALIGNMENT
LOCATION
DETAIL

KNOI' 8: CEMENT

POINTER, - WITH TUNER'SET TO
1610 KC, SET POINTER TO MARK
SHOWN AND CWENT T0 DIAL STRING.

DIAL STRINGING DETAIL

_ . 1,7 MANUAL
SET-TUNER so CORES ARE TUNING
our or cons um KC) _ SHAFI

Do not perform Steps 3, 4, 5 and 6 unless the tuner has been tampered with or associated compo-
nents have been replaced. Remove the escutcheonto expose

core screws. Before proceeding with
Step 3, back the tuning cores as far as possible out of the coils to elimi

nate their effect on trimmer

Adjust for maximum.

Adjust for maximum,

Adjust for maximum

ase; Step 5 should be last step. Then cement core screws

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

PLUG TO FIT RECUVER
ANTENNA RECEPTACLE

r"'1
T0 SIGNAL _ .-.I 6°" mfigwm
GEN RAWR " NNA
E 4 .1 3° I RECEPIACLE
I 1 mm. 5mm; cm
L_-_I__.__| must a: Amcnsn
to ma

DUMMY ANTENNA DETAIL

IF ALIGNMENT DETAIL