Philips 131 service manual

Page 1

RECEIVERS-BATTERY

SERVICE DATA

131

PHILIPS ' RADIOPLAYER

MODEL 131
srrcmcarions

(Subject to alteration without notice)

Tuning Ranges 530-1620 kc/s
5.9-IB.4 Mic/s
455 kc/s

Intermediate Frequency
Cabinet . . .

. Bakelite table
Battery Equipment ,

dry batteries.

2 x 45V heavy duty, plug-in type,

i x 1.5V plug-in type dry battery.

"A" 0.3A

Battery Consumption B" ISmA

NOTE: In some chassis the oscillator grid leak 92 is returned to A+.
chess

Is.

In these cases the connection should be changed to

VALVE EQUIPMENT AND VOLTAGE ANALYSIS

Valve Function l Vfi'r l EL: J 5);: l 5627;" 3;;
RF. Amplifier VI 1T4 83 35 0
Frequency Converter . V2 IRS ' 83 as 0
LE Amplifier l V3 in l as as , -0.6
m A23}: A'V'c' "d l v4 155 25 '20 l o
l I
Power Amplifier V5 3V4 a: as 4.3

NOTE; These voltages are measured with an "LOGO ohms per volt meter, except those marked with an asterisk, whidr are
meanued with a V,T.V.M., end they may vary : 10% item the figures quoted. They are measured from the aockat

points listed to chassis.

10 mm CNASSI$ FROM CAIINET.

Retrieve the plugs from the batteries, or if the receiver
is vibrator unit operated, remve the battery :Ilpa horn
the battery terminals. Remove the fair eontrol knob;
is firm pull is all that is necessary) and the cabinet
back. The chassis is held to the cabinet by three screws
in the baffle-two along the top and one in the right-
hand sideo-end (our screws through the bottom of the
cabinet. Removal at these seven screws allows the
chassis to be withdrawn from the cabinet. It the receiver
is vibrator unit operated, it is necessary to remve the
vibrator unit from the chassis below attempting to r:-
mova the baffle securing sum.

The dual: may be replaced by a reversal of the above
procedure.

ALIGNMlNT.

The iron acres for the aecondanas at itia LF. trans-
former: are in the top of the ans, than for the primaries
in the bottom.

Broadcast band alignment frequencies are IAZO kc/s
and 600 kc/I, short wave allmment frequenclu are
IBA Mc/s iamlllator trimmer], 17.8 Mc/s (aerial
trimmer] and 6 Male (oscillator mll slugl. The short
wave neutralising capacitor Cl3 is adjusted for maximum
signal at .8 Mic/s, whilst melting the tuning gang.
Do not alien h in the dine at the aerial and LP.
eeik. Before commencing alignment, set the dial cursan
With the tuning gang fully closed, to the letter S" mark
an the extreme RH. and of the calibration marks on the
bottom at the dial Wall.

DIAL CALIIM'IIDN.

If It is required to correct dial callhmtiuis for an equal
error on all stations, the cursor ammbiy ran be moved
on the dial cord. Loosen the clamping Icrevl, make the
necessary adjustment to the cursor position, and secunly
m-llqhten the clwinfl SCWW»

VIIRATOIL UNIT OPERATION.

Modal ISI may be operated from a 6 volt accumulator
by means of vibrator unit Model 8.

Provision is made an the melver chassis for fitting
the vibrator unit. The receiver battery leads should be
giuoaad into the vibrator unit sockets. the surplus cable
being neatly stowed In the abinet. It is also necoaeary
to lit the twirpin plug from the Vlbretor unit to the
socket provided on the receiver diesels.

A separate service sheet cover: the Modal 8 unit.

31 VOLT 0.6. oem'nou.

Model Isl may be operated from 32 volt D.C. mains
by means at vibrator unit Model B and 31 volt can.
verter unit Model 157.

The Model I l8 unit connect: to Model l3l I! outlined
in "Vibfltor Unit Operation" and the Modal lal unit
connects between the Model 8 unit and the 32 volt
mains When connecting up the Model 137 wilt, oun-
neet the negative lead of the Model iii! unit to the
necetlve terminal of the Model 157 unit. The 903!th
lead of the Model I IS unlt ls split-the wire anying the
lure connects to the terminal marked "VIE," the other
wire to the terminal marked "FIL"

When the Model I51 used on 32 volt D.C. rnalm.
leave the receiver switr: in the "on" position and control
it from the mains switch.

Published by Philips Electrical Industries of Australia Pty. Limited

February, 1952.

Sydney . Melbourne - Brisbane - Adelaide - Perth