Philips 172 service manual

Page 1

RECEIVERS A.C. SERVICE DATA

PHlLlPS RADIOPLAYER

MODEL 172

SPECIFICATIONS
(Subject to alteration without noticei

Power Supply 200-250, 4050 C/s
Tuning Range r 5304620 Kc/s
Tuning Type Permeability

455 Kc/s

Intermediate Frequency
Cabinet .

Plastic mantel

VALVE EQUIPMENT AND VOLTAGE ANALYSIS

Val" Functlar Vgx' all: 5:: 553:: Def/dim all:
Fraqulncy Convener v1 6AN7 2.15 43 98 -
LF. Arrwlfhr v2 sans 225 43 - -
Audie Amptlflnr, A.v.c. and Va 6597 72 - - -

Dcrnodulntor
Power Ampltfinr v4 6M5 219 225 - 6.75
Rectitiar v5 6V4 217/227 - - -
Dial Lamp Vll 6.3V 0.32A tubular scml
Unfilttred: 5+ 237 Acms ma, 1.9V.
Flltlnd: 3+ 215 Fri-mm. 6.4V.

NOTE: Than volt-an an managed with an "LCDO ohm: par volt" meter Ind may vary :: 10% from flu flour-s mat-d.
MmmndfiunhndrnpolmshfiwmMk.orumflmmixtorliflod. Themcinrshouldbo
in I "no flat-l" m.

1'0 REMOVE CHASE ROM CAIINET

Ramon tour control knob: (- firm pull it all that is POSITIMING OI GONTIOL KNOBS ON IPINDLIS

may). Ram ablmr hdr (4 m), mnldur
plat. urhl Ind from clip and unscmr th. dial window
warring clump from inside uhinn. Rclun dial lamp-
IIoldor mmbly from its mtlng post. Thu dial

may now I:- ummed. Withdr-w mp union of
winds»: from abinut first until th lngl' allows rcltrsr
at haltmbuttant lemmrftunmrqflndlm
Rokunofttumduulsrrmflngm [dunk
Ircnt to ablmt mar tuning wlndla and volutnc oontml
WW) allow; ml at duals.

Nun: When rurmvlnp dust from album, are
rhould bu excrdud with mold to the sue-km voles
call lends. Spukn lad laugh is sufficlent if urvlc-
Mthd-nakmwmitsduslsmbolndou
proximity to cabinet, uthcrwisa voice coil Ind: Id be
unsold-«d It lug Strip. The dust: my be mpIAc-d
by a maul of the about pron-dam

MAINS VOLTABE ADJUSTMENT

Thu power "Informer Is pmvtdod with two prlrrnry
wlndinq toppings-ZOOIZSO volt: and 240/250 volts-
for tdiustmcm of th- nmivur to flu supply voltm- It
the mint 0f Mall-flat. Th. tic-Ivor ls adlrntod at
th. tory to th- 240/150 W's Wnl

DIAL CALIIMTION ANUWMENT
if dill ellibratlons m lneormt our thc dint ml. by

m Inn-l amount, thamnnbemmdbymwing
tin cursor on tIn tunlna ¢indtm

Corr-ct posltton cf knob in asp-o to tint on spindle
ll Indium! by two pips on tho bush oI th- knob. The
«dim Wan m. m identification rmrlu should line
I; with th- fl-t sectlnn on fin spindlo.

ALIGNMENT

By making use at short Myth tools, niimmt can
be mfimkm wlth the dual: in tho cahlnt.

M. Wm
Sat volun- control at mlximum. ton. control to high
paxition and tuntr lnductunu to minimum (anti-
clackwisal
Punk tbs LF. transform": in the following on!»
Snood I.F.T. marry-front mw
Somnd I.F.T. prim-ry-rur Icruw
First LET. "condom-screw nwar SBHS
First LFIT. prim-Hm! num- 6AN7

u. Alp-M

With mar clued (clackwlui adiuar poinnr ta stop
mark (am-ll triangl- lacatld Mfume ounlde at sul-
:W)h right at lenar "W" of nm doliuutlon.

Contact gnu-tor mm mndud |.R.E. durmry tr:
norlll and urth lads Ind at trtrrrrners to Ippruximt-ly
the cantro of their adluutrrwnt rams.

Wlth narrower set II 530 Kc/s. ml: mill-tor
trimmer (no-r tun-r) . Mlufl dial pointer and neuter
3° 1,500 KCI: (SAIO and out «rt-i trimmer (near

AN7).
Repeat check: It 530 Kcls and 1,500 Kc/L