Download K70 Service Manual - Old Philips Colour TV

CTV S26K497lrc
Servlce
manual
P tups
o
Volume control
Rl3
@
Tone control
@
@
Brlghtness control
Rl3 80
Contrast control
R92 9
Slrlted
o
@
o
81
R976
Saturatlon
Hue
control
control
VItrF + IJHF
R1382
R1043
hmtng
U14
@
@
@
Matns
swlteh
Black-whhte/colour
Speech/muslc
SKl
swltch
swltch
SK-3
SKz
for receptlon of black-whlta and colour transmltters operatlng according to CCIR-PAL standard.
Aerlal match-tng
Convergence
tr'ocus strng
I. F. lumlnance
I. F. sound
75 O
magnetlc
electro- statlc
38. I MHz
32.9 MHz
F"M sound
6,0 MHZ
I. F. chromln[utce
Subcarri.er
Malns voltage
Power consumptlon
Band I
Band III
Band IV +
(WIF)
(VHF)
V (LIHF)
470 47
1-74
34,47 MHz
4.43 MHz
220 - 240 V
280 W
68 MHz
230 MIlz
890 MlIz
s)
604 PURLEY WAY . WADDON. CROYDON . CHg 4DR
TELEPHONE: 0l-686
0505
(Recorded messages after business
hours)
TELEX: 262308
Index: CS27062-CS27074, CS26984, CS26985, CS27075
Subject to modification
4822 727 L0525
csz7062
Printed in the Netherlandg
WARNINGS
.
.
.
.
.
.
3. Removlng the chassls.
As the chaesls ls llve lnde@nddnt of the posltlon of the malns
plug the set shcrld be connected to the rnalng vla an lsolatlng
trangformer (approx, 500 VA) wben the rear panel ls removed.
Due to the htgb tenslon (ca. 25 kV) the valves ln the HT cage
produce a certaln amount of X-radiatlon. However, when the
cage ls closed the screenlng ls so effectlve that the X-rays
ca:mot leave the cage.
To prevent that the set can operate wlth opened HT cage a
safety swltch has been provlded whlch lnterrupts the 92
voltage for the llne output valves. Thls ewltch should never
be closed or shunted when the cage ls open.
After repalr ensure tlat all Bcrews tn tle ltd are properly
tlghtened.
Never replace valves or components whlle the set ls svltched
- Hlnge out the chassls.
- Remove the plugs A,B,C,E,F,H,L,M -T-2.
- Remove the prlnt of the plcture tube.
- Unsolder the two earth leads.
- Detach the suspenslon cord from the chassls.
- Detach the H. T. -cable from the plcfure tube.
- Llft the chassls out of the two hlnge polnts and remove lt
from the chassls.
4. Removlng the control
-
on.
U6e safety goggles when replaclng the plchrre tube,
When replaclng valves or other componenta ln the HT cage,
removlng the chasels and replaclng the plcture tube, ftrst
short-clrcult the residual charge on the plcture tube. For
thls connect a properly lnsulated wlre to the chaesls and
hold the other end agalnst the H.T. connectlon for a few
seconds.
Be careful when meagurlng the voltages on the tube Bocket.
The focusslng voltage (on potnt 9) ls approx. 4.5 kV,
-
5. Removlng the push-button unlt
-
Remove the plugs X and Y.
Remove the three flxtng screws.
Remove the push-button unlt.
6. Replaclng the hrnlng potentlometers
-
Remove the push-button unlt.
- Remove the cap from the push-button unlt.
- Unsolder the leads from the defectlve potentlometer strip.
- Bend the tag wlth whlch the strlp ls flxed, upwards.
- Replace the strtp wlth the potentlometer.
REMARKS
1. The osclllogtams have been measured under the followlng
condltlons.
7. Replaclng the p. c. board of the band swltch of U14
- Remove the hrnlng unlt from tlre set.
- Remove the screenlng cap and the polnter.
- Loosen the ftxlng screw from the p.c.board
a. For
the black and whlte sectlon a cross hatch pattern
has been used as lnput stgnal and for the chromlnance
sectlon a colour bar pattern.
b. The brtghtness contrl,
lcrob 3, at normal brlghtness.
Imob 4, set to 4 Vp-p on the
c.
panel
Remove the cover from the convergence panel.
Remove the convergenee panel from tire set.
Remove wlth a long screwdrlver.the two screws from the
under- and the upperslde of the control panel.
Remove the slx larobs (volume, tone , etc. ) from the front
of the set and remove the control panel backrvards.
The contrast control,
control grtd of the vldeo output valve.
d. Saturatlon control larob 5, set to 40 mV p-p on the base
of TS439.
e. The hue control, lcrob 6 ln the mechanlcal mld-posltlon
2. The dlrect voltages have been measured as follows:
No aerlal slgnal, minlmum brlghtness, maxlnum contrast
and saturatlon.
The voltages ln the chromlnance sectlon marked wlth an x
have been measured wtth the colour/black-whtte swltch ln
posltlon 'rcolour" and the collector and emltter of TS443
lnterconnected.
a blank pattern ls required when the PM 5507 ls used,
thls pattern can be obtalned by means of the ralnbouw
slgnal, the vldeo knob turned fuIly clockwlse and the
black/whtte-switch of the set turned to posltlon blacVwhtte.
4. Integrated clrcult TAA550 (U414) mounted on p. c. board
8, ls avallable ln varlous verslons under one code number.
-
-
8. Replaclng valves ln the hlgh-voltage cage.
- Flrst read the warnlngs.
- Remove the cover from the H. T. cage.
- Loosen the serews fixtng the top plate, a few hrrns; push
3. If
These verslons are malked as follows:
a. Red or yellow palnt dot.
The Zener voltage ls between 30 and 33 V.
Thls I. C. may be marked as follows:
No code number or code number 30 on the houslng of
the I. C.
In this case the brtdge wlre should be fttted tn parallel
wtth Rl513.
b. Green palnt dot :
The Zener voltage ls between 33 and 36 V.
Thts I.C. may be marked as follows:
Code-number 33 on the houslng of the I. C.
In thls case no brldge wire should be fltted ln parallel
of the band
swltch and pull the p. c. board outwards. (Attentton! Do
not damage the contact sprlngs. )
Write down the colours of the connectlng wlres and unsolder them.
Connect the new p. c.board and place lt ln posltlon,
carefully ltftlng up the contact sprlngs.
Reftt the polnter and adjust the helght of the p.c.board
so that the polnter can move unhampered.
9.
thls plate upwards. Consequently, the PD500 ls algo
movlng upwards so that lt can be easlly removed.
Push the valve of valve holder GY 501 sllghtly upwards
so that the top connectlon of thls valve can be removed.
Now the valve can remove from the holder.
Removlng the convergence colls
-
Remove the multlpole plugs
- Insert a thln screwdrlver
-
N,O, and P.
tnto the mlddle opening (Flg. 2)
and carefully press the screwdrlver downwards.to dlsengage
the locklng pln.
Now the convergence coll can be wlthdrawn.
Note: When the coll ls lnserted agaln lnto the holder, one
should hear the holder cllcktng ln the openlng of the coll.
wlth R1513.
MECHANICAL INSTRUCTIONS
1.
-
Remove the screw from the upper slde of the cover to the
left of the rear panel, and remove thls cover.
Note: The c(nvergence panel ls provlded wlth explalnlng
slgns to facllttat€ converglng. The numbers lndtchte
- the sequence of converglng.
2. Hlnglng out the chassls
- Remove the rear panel and, subsequently, the nylon
-
locking pln from the rtght-hand upp€r slde of the chassls
Push the plastic locldng plate on the rtght-hand urderslde
of the chassls to the rtght.
Fig.2
csz 7063
BLOCK DIAGRAM
SOUND
s526,527
B
-Y-001
GR163
TS 121 ,
/oatr.e
L22,L23,L58
TS 521
U5540
- 8402t
U554
I
I
i
tE_AMp.
B
B-P-002
GR160
-S -001
B
-S-005
B
cHRol
DETEc
-C-010
/oarcz
LUM INA
N
CE
GR459, /,70
U
536o,
B
U
,L72,L73
TS/,25, L27,L28,L29
553 b
-L-007
B/,01, 416t
U536c
LUM.IF.AMP.
IF. AMPLIFIER
U562 od,o
OETECTOR
CHROM. IF. AMP.
u1l.'17
I
B-C-010
B-r-007
BURST
B-L-008
AMP
I
I
U553o
B-C-015
B
- L-010
H OR
IZON TA L
U589
e
GR 495
TS
/.52, 453
PULSE AMP
6R /.90, /,91
8408t
8408p
Bl.10,t'11,u2
8L13, L1L
PHASE DISCR
B-T-002
B-T-003
B
-T- 008
TS /.3/.
TS 426
EMITTER FOLLOWER
( L uM.)
B
TS15r 6R488
INTERFERENCE
B
VERTICAL
-T-007
-T-007
SUPPR
TS455
PULSE
B
AMP.
-T-007
TS
456
6R
496
AUT. FIELD SYNC.
B- C-012
8116p ,
L17
T597
TRANSDUCTOR
B-L-009
BURS'
io,ra*,",*
OCK DIAGRAM
CHROMINANCE
TS/.36
IE-A
CHROM.
MP,
DE
T
/ tstls
The lay-out of thls block dlagram follows the lay-out of the
clrcult dlagram as closely as posslble.
CHROM. AMPLIFIERS
ECTOR
B
-C-011
B
Wtth the aid of the numbers of the valves, unlts, etc. stated
above the blocks, the relevant sectlon of the ctrcult dlagram
can be located eaeily. The numbers below the blocks lndlcate
-C-012
the chapter of the SERV-O-MECUM ln whlch the worldng of
these clrcuits ls descrlbed.
U562
od,of,oi,op
TS 435
U
563
k
U
REACT CIRCUIT
- ---1suB.osc
suB oscrrL.
CHROM. AGC.
TSI.I3,LLL GR479
563 n,t,
R 1215
I
COLOUR KILLER +
AMP
"WHITE" SETTING
WHITE SWITCH
:
B-
C
U553e
B-C-016
-0i5
B-C-017
B-
_
C-018
B-B-007
CH ROM. VIDEO
TS
4/.7
GR
185, /.86
u578 i.f
8403,10/., 405
BLUE LATERAL
R1299/ | R 1307
STAT. CONV,
CONV.
(R-Y)AMPLIFIER
BEAM CURRENT
TS /.3/.
TS
SETTING
t L\,Ll.2 GR 493
B
COLOUROIFF.
-C -012
+
MULTIVIERATOR
DC LEVEL SETTIN6
B- C-012
B-B-009 r
B-B-009
AMPS.
B-
B-007
HOR
CONV.
VERT. CONV
TS 445
B-C-012
B-B-002 |
(B-Y)AMPLIFIER
B-C-013
B
-C-0
B-C- 029
GR 198
499,500
B-B-003
R1315
/
R1323
12
I T V 2/.16
v7 841
R 1125
R1126
s 598
TD 5/.0
R
2o
A
2b
6.tlt,
1o
Q
1338
u 578
n37
R 1303
1b
-
1336
lDENTIF.T,SkHz
SK9
u s62
R
ao o1Z:rL
4b
Or|rs
5o Sr5rs
o tlrc
8o Or!r,
sb orlre
6o Q t5rt
sb
R1298
G2 Blr!
u536
R
o
o
v5L7
u572
3/,,5 MHz
@e
R
33,1 MH z
1050
sl(10
(R-Y)'+(a-v)'l+
Oo
R1307
u 569
u 553
(R-Y)'+
+*
€
(g-Y)'
R
R1306
1055
SATURATION//CONTRAST
u 552
R
TD 570
997
5,5 MHZ
@t$v
1
330
32.? MHz
KONVERG.
Fig. 3
cs27065
1299
SK8
R1258
R909
+25
s 598
8 L1L
PD
Y
r03
I
G2 8119
B
419
R1299
l
72
R
1215
R1307
HOR. SYNC
R 1207
R1212
BALANCE
B 41 AlBA11
2
Fig. 3
s6o4
5OO
A
ADJUSTMENTS
t-
Adiustlng for a stralght ptchrre (see Flg.3)
Sllghtly loosen screw B. T\rrn the complete deflectlon
unlt stlghtly to the left or to the rlght untll the plchrre
ls stralght.
Ttghten screw B agaln.
2
Focuslng (see Flg.
of U589 so that the entlre plcture ls
as sharp as posslble at hlgh brtghbress.
3
Dynamlc convergence (see Flg. 4)
Remove the cover ln
Pln-cushlon correctlon (see Flg. 3)
z.
Wlth the atd of 5598 and Rl292 make the horlzontal
llnes at the top and bottom of the plcture as stralght
as possible.
b. Wlth the atd of R1179 make the vertlcal llnes ln the
mlddle of the plchrre as stralght as posslble.
Start by checklng ild, lf necessary, readjustlng the statlc
convergence (see polnt ?a and 7b).
Use a crossl'hatch pattern, swltch off the blue gun wlth
Vertlcal llnearlty (see Fig.
If the centre horlzontal green and red llnes lntersect, turn
the core of S604 (see Flg. 3) untll the llnes are parallel
as far as posslble or untll they colnclde.
Slttch on SKll.
lcrobs 7a, 7b and 7c (only lf the convergence strongly
devlates): start wtth the lsrobs ln the mld-posltlon.
Make the central horlzontal blue llnes as stralght as
posslble.
. Wlth
. Srvltch off the blue gun (SK11).
. Wlth lonob 3:
Adjust so that the horlzontal red and green llnes are
parallel over the entlre plcture wldth.
Horlzontal llnearlt (see Flg. 3)
Thls ts adjusted wlth the core ln coll x of U589.
3)
a. Devlatlons over the full plchrre helght are corrected
wlth the ald of R1273.
b. Devlatlons ln the top of the plchrre are corrected wlth
. Wlth lmobs 4a and 4b:
Adjust so that the central vertlcal red and green llnes are
parlllel over the entlre plchrre helght.
. Wlth lmobs 5a and 5b:
Adjust so that the dlstance beiween the horlzontal llne
palrs (red + green) ls equal over the entlre plcture helght
ln the mtddld of the screen.
the ald of R1284.
Plcture helght (see Ftg. 3)
Thts ls adjusted wlth R1266.
7.
StatLc convergence (see
. Wlth
Flg.3)
Use a dot or cross-hatch pattern.
a. Swttch off the blue gun wlth SK1l, see Flg. 3.
Make the red and green patterns colnclde ln the centre
of the plcture by means of lmob la and knob lb. Thus
a yellow pattern ts obtalned.
Srrltch on the blue gun agaln.
b. Adjust lmob 2a and 2b so that the blue pattern and the
yellow pattern colnpl$e in the centre of the screen. As
a result a whlte pattern ls obtained.
Note: If no satlsfactory result ls obtalned, lt ls posslble to lnterchange the termlnals S1-S2 of the -blue lateral
untt, see Fig. 3.
Centrlng (see Flg.
3)
a.. Wlth R1290 the picfirre carr be shtfted ln the horlzontal
dlrectlon.
b. Wlth R1289 the plcture
can be shlfted ln the
vertlcal
dlrectlon.
Colour purltv (see Flg. 3)
Allow the set to warm up for approx. 20 mlnutes. Apply
a blank pattern slgnal. The room should be as dark as
posslble, brlghtness and contrast should be set to normal
llght lntenslty. Slltch off the green and blue guns by means
of SK8 and SK10 respectlvely.
Loosen the four wlng nuts A a few firrns and sllde the
deflectlon coll as far as possible forwards or bac}ilvards
untll the red blur on the screen ls as small as posslble.
After thls the red spot ls centred as well as posslble by
means of colour purlty rlngs C.
After thls the deflectlon coll ls slld back untll the entlre
screen ls unlformly red. Subsequehtly, check the blue
and green colour purlty by flrst swltchlng on only SK8
and then only SK10. When after thls SK8, SKg and SK10
are swltched on slmultaneously, a unlformly whlte plcture
should be obtalned. Thls plcture should contaln no blurg.
If lt contalns blurs, correctlon to some extent ls posstble
by sllghtly hrrnlng the colour ptrrlty rlngs and/or sllghtly
movlng the deflectlon coll. After thls the three colours
should be rechecked lndivldually. Tlghten the wlng nuts
agaln.
If no prqper result ls obtalned the complete procedure
should be repeated.
For checklng the landtgg of'the electron beams on the
phosphor dots,use can be made of mlcroscope tlrye 800/
MLS, ordertng number 4822 395 90041.
csz?066
front of the convergence panel.
SKll.
3)
Set potentlometer ap
10
lmobs 6a and 6b:
Adjust so that the dlstance between the vertlcal llne palrs
(red + gleen) ls equal over the entlre plcture wldth ln
the mlddle of the screen.
. Cary out red and green statlc oonvergence (see polnt 7a).
. Wlth lmobs 7a, 7b and 7c:
Adjust so that the central horlzontal blue llne and the
correspondlng horlzontal yellow Ilne are parallel over
the entlre plchrre wldth.
.
Wlth lorobs 8a and 8b:
Adjust so that the dlstance between the horlzontal llne
palrs (blue and yellow) ls equal over the entlre plcture
helght ln the mlddle of the screen.
. Statlc convergence (see 7a and ?b).
. Wlth lmob 9:
Adjust so that the dlstance between the vertlcal ltne
palrs (blue and yellow) ls equal over the entlre plchrre
wtdth ln the mlddle of the,screen.
Note: If no satlsfactory result ls obtalned lt ls posslble
to lnterchange the termlnals R1-R2 of the blue
lateral unlt, see Flg. 3.
.
Statlc convergence (see point 7a and 7b).
11 At the back of the set above the addltlonal
loudspeaker
socket there are the knobs R, G and B (Rl302-R1298
and R1306 respectlvely) behlnd the cap on the rear panel.
Wtth these knobs the background colour can be adjusted
accordlng to the wlshes of the customer.
ADJUSTMENTS AFTER REPAIRS
1.
2.
IF-AGC
10. Trackln of saturatlon
Contrast and sahrratlon controls to maxlmum.
Connect an oscllloscope to 7M05; measure and note down
HF-AGC
the peak-to-peak value of the colour slgnal.
Connect the oscllloscope to 7 8401; measure and note
down the dlfference ln voltage between the black and the
whlte level.
Reduce thls voltage wtth the ald of the contrast control to
Z/S of. the value measured.
Connect the oscllloscope again to 78405 and adjust R1055
to 2/3 of the voltage measured at thls polnt.
Thls clrcult ls only operatlve at very strong lnput slgnals.
If the plcfure of a local transmltter ls dlstorted, adjust
R997 so that the plcture ls undlstorted.
3.
Horlzontal tlme base (use a cross-hatch pattern)
a. Connect junctlon C785/R1170 (M7) to chassls.
Adjust U587 so that the plcture ls stralght.
Remove the connectlon between junctlon C785/R11?0
and chassls.
Connect bTS453 to chassls.
Adjust Rl162 so that the plcture ls stralght.
Remove the connectlon between bTS453 and chassls.
b.
4.
Booster voltage (a) and booster dlode current (b)
(use a cross-hatch pattern)
a. Connect a valve voltmeter (range 1000 V d. c. ) between
junctlon C860/5590 (r'-'r) and polnt 10 of U589 (Ml0).
Adjust Rl207 to 550 V meter deflectlon.
b. Connect a valve voltmeter between 9B410 (M8) and
3B411 (M9).
Adiust Rl203 to 0 V meter'deflectlon.
Check the voltage under a agaln and, lf necessary,
correct lt.
Note: The booster voltage should be aceurately adjusted
to the value speclfled and should never exceed thls
value.
Also take lnto: account the tolerances of the measurlng
lnstrument used and ensure that the mains voltage does
not devlate.
5.
and contrast (appty a colour slgnal)
Adjust R1003 for ma:rlmum nolse ln the plcture (no stgnal).
11.
@
(e. g.
after replacement of plcture tube;
use a blank pattern)
Set the
colour swltch SK3 to posltlon black
a^nd
whlte.
Use another set of the same type as a reference; thts set
should be connected and adjusted ln the same way.
Allow both sets to warm up for approx. 10 mlnutes.
Adjust the cut-off polnt of the new plcture tube (see polnt 6).
If requlred, correct t};re 92 flne adjustments (R1298, R1302
and 1306) untll the llght lntenslty of both tubes ls the
same (at low brlghtness).
Next, set both hrbes to a hlgh brlghtness. If the whlte
oolour of the new hrbe devlates, the cursors A, B and C
of sllde potentlometer R1215 (see Flg.3) should be adjusted
untll the whtte tones of both tubes are approxlmaterly
the game.
If the sllders A and B of sllde potentlometer R1215 have to
cross each other, the jumpers V2 and V3 on the plcture tube
prlnted panel can be soldered ln the other positlon.
In both sets remove SV3 and connect the pln of SV3 on the
p. c.board to the +25 V (junctlon R9L4/R905 on prlnt 5).
Now eqtrallse the white colours wtth cursor D.
Rernove the lnterconnectlon and reflt termtrral SV3.
Beam current llmttatlon (use a plaln whlte and synchronlzed raster)
Brlghtness and contrast to maxlmum.
Remove jumper across R1213 (wlre support on hlgh-voltage cage).
Connect voltmeter across R1213 and adjust for 0.1 V
wlth F"L2]-2.
Subsequently, brlghtness and contrast to mlnlmum. The
meter readlng should now be 1. 3 V (t 0. 1 V)
Reflt jumper across R1213.
Check the booster voltage. For any eorrectlons see
polnt 4a.
6.
Cut-off polnt of plcture tube (use no aerlal slgnal)
Remove slngle plug from p. c. board 4. (CRT-base panel)
R1298, R1302 and R1306 (g2-flne adjustment) to mld-
posltlon.
Make the room as dark as posslble.
The potentlometers mentloned below should be adjusted
so that the screen just remalns dark.
R1299 for the green gun (swltch on SK8 and swltch off
SK9+SK10 ).
R1303
for the red gun (swltch on SK9 and swltch off
SK8+SK10 ).
R1307 f.or the blue gun (swltch on SK10 and swltch off
SK8+SK9).
reflt the slngle plug.
Apply a black /whLte test pattern from a transmltter or
a generator, and vary the brtghtness from hlgh to low
wlth the brlghtness control.
Lr so dolng, the grey hue should not change. Correct any
devlatlons at a low level of brlghtness by means of larobs
Swttch on SK8 and SK9 and
G,
R,
(Rl
7.
and B.
29 8
, R130 2 and R130 6).
+25 Supplv Voltage
Connect a voltmeter between the collector of TS421 and
chassis.
Adjust R909 so that the meter readlng ls 24.6 V.
8.
Vertlcal tlme base (use a cross-hatch pattern)
Short-clrcult RL246.
Connect an 8.2 M0 reslstor between the cursor of R1258
and 28416.
Adjust R1258 untll the plcture ls statlonary;
Remove the short-clrcult and the 8.2 M0 reslstor.
9.
Vertlcal output stage
Connect a voltmeter between 784L7 and chassls.
Adjust Rl280 to the voltage value lndlcated on the chassls.
csz 7067
(J
TRIMMING INSTRUCTIONS
B. THE CHROMINANCE CIRCUIT
Note s :
1.
1.
2
Durlng trimmlng the T. V. set should be connected to the
malns vla an lsolatlng transformer (500 VA).
The measurlng equlpment should be properly earthed.
The IF chromlnance detector (see Flg. 3)
Set the band swltch to posltlon UHF an apply an unmodulated 36.8 MHz slgnal of approx. 10 mV to the IF
lnjectlon polnt on the hharurel selector (see polnt 2
under |tNotestt).
Apply a dlrect voltage of 5. 5 V between junctlon
R100s/Clat (test polnt "M2") and chassls (ff-'' to chassls).
Connect a valve voltmeter (posltlon 10 V d.c., negatlve)
to polnt 1 of U554 (test polnt ttlU,.f.z9rr) and adjust core I'in'r
Applvlng the IF-slgnal
Apply the IF-slgnal vla 1000 pF capacltor to polnt G of the
VHF channel selector (prlnt 8).
of U554 for mfurlmum deflectlon.
2.
A.
1.
The IF st
es
* lumlnance detector (see
at
40. 9
to posltlon UHF and apply a wobbu-
polnt on the \IHF channel selector. Apply a voltage of
5.5 V between junctlon Rl003/C681 (test polnt rfM2")
and chassls (tr-r' to chassls).
Connect an oscllloscope to polnt 1 of U554 (test polnt
Flg. 3)
to posltlon UHF and apply unmodulated
IF slgnals of approx. 10 mV to the IF lnjectlon polnt on
the VHF channel selector (see polnt 2 under "Notes").
Turn the contrast control to ma:r.
Appty a dlrect voltage of 5.5 V between junctlon R1003/
C681 (measurlng polnt 'tN'.I?rr) and chassls ('r-rr at chassls).
Connect a valve voltmeter (posttbn 10 V d. c. negatlve)
to junctlon S45I/C654 (test potnt '?M3"), arid adjust the
cores mentloned below for mlnlmum meter deflectlon.
"frfr of. 1J552 at 30. 9 MItz tt
rfef
of. U552 at 30. 9 MHz x
of. 1J552
IF bandpass curve
lator slgnal of 36 MHz (sweep 10 MHz) to the IF lnjectlon
Set the band swltch
rrlil
Checklng the
Set the band swltch
LUMINANCE CIRCUIT
f
rM29 rt).
The curve should be as shown ln Flg.8.
38,9MHz
MHz x
rfirr of U552 at 40.9 MHz x
rdil of U553 at 33, 1 MHz
rrdrr of U536 at 33,1 MHz
rfe'r of U536 at34,5MHz xtr
U551 at 32.7 MHz
f
x Cores 'et' and ttj, of U552 are hollow and are located
at the top of the coll can.
Coll 'ff'f and tflfr are accesslble by means of a trlmmlng
f
key through the hollow cores
xx
rferr
and
36,8MHz
rrjrr.
For adjustlng thls core flrst lnterconnect the collector
emltter of TS443.
33.1MHz
25x
and
,
Checklng the
IF bandpass curve
>500x
of the VHF channel selector. Apply a dlrect voltage of
5.5 V between junctlon R1003/C681 (test polnt ttMz'?) and
chassls (rr-rf to chassls).
Connect an oscllloscope to polnt 1 of U536.
The curve should be as sho'urn ln Flg. 7 . When the
collector and the emltter of TS443 are lnterconnected,
the dotted curve of Fig. ?, should be obtalned.
I
I
2
\\
3.
M
Hz
>500 x
30,9MHz
to posltlon UHF and apply a wobbulator
slgnal of 36 MHz (sweep 10'MHz) to the IF lnjectlon polnt
Set the band swltch
/'0,9
41,5 MH z
Fig.8
>70x
The 4.43 MHz chromlnance-ampllfler, see Flg. 3
Pull out the IF cable at the bottom-left on the chassls
Turn the saturatlon control to max. and set black-whtte/
colour swltch (SK3) to posttl-on "colours'f .
hrtercormect the collector and emltter of TM43.
Connect an oscllloscope (prosltlon AC) or valve voltmeter
wlth frequency range up to 6 MHz to the collector of TS439.
Apply an unrnodulated 6 MHz slgnal (approx. 10 mV) to
polnt 1of U55A (test polnt I'M29rr) vla a capacltor of
2200 pF and adjust core I'bf f of U558 for mlnlmum ampllhrde,
Now apply 15,5 MHz slgnal and adjust core t'err of U558 for
mlnlmum amplltude.
38MHz
C.:SOUND SECTION
35MHz
The 6 MHz sound sectlon (see Flg. 3)
\
38,9MH
z
t
33,1 MH z
> 320x
?l),--13!,17MHz
-Y 10x
-
3
0,gMHz
>500 x
Fig .7
4o,gMHz
,500,
41,5 MH2
>70 x
P'rlI out the IF cable at the bottom-left on the chassls.
Apply an unmodulated 6 MHz slgnal (approx. 10 mV) to polnt 1
of U554 (test polnt rrM29") vla a 2200 pF capacltor.
Connect a valve voltmeter (pobttlon 3 V d. c. posltlve) to
junctlon R975/C665 (test polnt "M5t'). Turn core 'h, il' of
U547 a quarter turn antl-cloclsrdse (the meter glves a readtng
of approx. 1 V) and adjust ?tf , g" of U547 for ma:r. meter
deflectlon. Subsegrently, connect an 820 Q reslstor between
polnt 3 of U557 and chassls and adjust rreff of U557 for max.
defleetlon.
Remove the reslstor from polnt 3 and connect lt between
polnt 9 of U55? and chassls and adjutst "c,d" of U557 for
max. deflectlon.
Remove the reslstor and adjustth,lt'of U54l to a deflectlon
of 0 V.
Subsequently, apply a 30 7o modulated AM stgnal and adjust
rralrf of U547 for mlnlmum ouptt voltage on test polnt rtM5rt,
to be measured by means of an oscllloscope or mllltvoltmeter"
csz
706 8
n
D. seECIFIC SHRoMINANcE ADJusTMENTs
1.
(see Fig.3)
The sub-osclllator
Apply a colour slgnal and adjust the recelver to normal
setttng.
Connect an oscllloscope to polnt 9 of U563 vla an attenuator probe (10 :1 ) .
Connect junctton 5561 /Caaa to chassls and lnterconnect the collector and emltter of TM43.
Adjust ''ab" of U563 for mlnlmum amplttude on the oscll=
loscope.
Remove the oecllloscope and adjust "ff ' of U563 so that
the colirur pattern ls practlcally statlonary.
2,
F is.11
The ldenttflcatlon clrcult
Apply a colour slgnal and set all controls of the recelver
to thelr normal posltlons.
a. By means of a slngle-beam oscllloscope:
Connect an oscllloscope to the collector of TS434
(measurlng polnt M23) and adjust 5556 for murlmum
amplltude (about 20 V p-p). Remove the oscilloscope
b. By means of a double-beam oscllloscope:
Connect the "beam A" lnput to the collector of TS434
(measuring polnt M23) and the "beam Bf ' lnput to
junctlon C732/C?33. Adjust S556 so that the Ilne
pulse colncldes wlth the maxlmum and the mlnlmum
value of the ldentlflcatlon slgnal (see Flg.9).
Remove the oscllloscoPe.
F
i9.12
When Flg. 10b ls obtalned, adjust R1103 so that Flg. 10a
arlses. Subsequently, connect the I'beam Arf lnput to
the collector of T5445 (test polnt 'rM18) and adjust the
horlzontal ttme base so that 2] perlods arlse (see Flgs.11
and 12). In these figures the sectlons lndlcated by means
of the clrcle are essenttal. Dlsplay one of these sectlons
on the oscllloscope by settlng the horlzontal amplltude
to x5 (lf necessary, use Xshlft). The oscllloscope rnav
now show one of Flgs. 13.
Fig
3.
9
The colour AGC
- Appty a colour slgnat and set all controls of the recelver
to thelr normal Posltlons.
- Connect a valve voltmeter (1n;poslttron 10 V.:) to
jrrnctlon RL029/R1031 (measurlng polnt M"25rr) and
adjust "h,1" of 1J562 for mlnlmum meter readlng
(about 5 V).
Remove the voltmeter.
Fig.13o
Fig.13b
4a. The dela Ilne TD570 (wlth PM 5507)
Apply the ralnbow slgnal from the PI\{5507 and adjust
the recelver to normal settlng. Connect the rrbeam Bil
lnput of a double beam oscllloscope to junctlon Rll04/U575
(test polnt I'Ml9") and adjust the horlzontal tlme base
so that three perlods are dlsplayed (see Flgs.lOa and 10b).
F ig .13c
Fig.13c
Fig. 13d
- If Flg. 13a ls dtsplayed both for the B-Y'
F ig. 10o
(Flg. 11) and
for the R-Yt slgnal (Flg.L2\, the amplltude and phase
of the delay llne are correct and no further adjustment
ls necessary.
- If Flg. 13b ls only obtalned for the B-Yt slgnal, then
adjust V572 so that Flg. 13a 1s obtalned.
Flg. 13b ls obtalned both for the B-Y' and for the
R-Yt slgnal, then flrst adjust the core (crosshead) of
U569 so that Flg. 13a ls obtalned for the R-Yt slgnal
and adjustcUl72 so that thls td also obtalned for the
B-Y I slgnal.
- If
Flg. 13d ls obtatned, flrst adjust.R1060 so that
Flg. 13b ls dlsplayed, Rrrther proceed as descrlbed
ln the precedlng sectlon.
If Flg. 13c ls obtalned, adjust R1060 so that Flg. 13a
ls dlsplayed.
- If
Fig.10 b
csz7069
-
4b. The PAL dela IlneTDJ?q(wlth PM5506 or PM5508)
Set the generator to posltlon "Delay". Set the contrast and
the brlghtness to thelr normal posltlons, and set the
saturatlon control to 3/4 of tts range.
- If the thlrd bar shows the I'Venetlan bllnds?' effect,
5b. The sub-osclllator
and the burst- hase dl scr lm lnator
(wtth PM 5506 or PI\4 5508)
Set the geDerator to posltlon rrPhaseI and set all controls
of the receiver to thelr normal posltlons.
a. Adjust I'aerr of U563 unttl the lower part of bars 1 and
2 ls practlcally equal to the upper part of these bars.
b, Adjust t'vrrof U562 untll the Iower and the upper part
of the thhd bar are equal.
c. Repeat the adjustments mentloned sub a) and b) until
the Iower and the upper part of the flrst, the second
and the thlrd bar are equal.
elemlnate thts wlth R1060.
- If the flrst and second bars show the "Venetlan
-
bllndrr
effect, ellmlnate thls wlth U569.
to posltlon 'Colorlr Barr'.
the fifth bar.from the left (cyan and
magneta respectlvely) shows the I'Venetlan bllnds"
Set the generator
f
Il the thlrd or
-
effect, ellmlnate this wlth U572.
Set the generator
6a. The
to posltlon "Matrlxr'.
elimlnate thls wlth R1103.
Note: For photographs of the I'Venetlan bllnds" effect
reference ls made to the Dlrectlons for Use of
the colour pattern generator (PM 5506 - PM 5508).
5a. The sub-osclllator phase
trAdjustments after repalrsr'.
Apply the colour bar pattern from the PM5507 and tune
the recelver carefully to the hlgher sldeband.
Turn contrast and saturatlon to maxknum and brlghtness
to mlnlmum. Set the hue control to lts mld-posltlon and
the black-whtte/colour swltch to rtcolour". Turn the
vldeo control of the PM 5507 to maxlmum. Connect an
oscllloscope to polnt 12 of 8419 (B-Y stgnal) and adjust
rrolr of U577 to 150 V,
@eak-to-peak value). By means
of the saturatlon control decrease thls value to half
(75 V), then by adjusttng "oil of U577 lncrease lt agaln to
150 V.
Next adjust, ln turn, the contrast,brlghtness and saturatlon controls for a normal plcture. Wlth the vertlcal
amplttude control of the oscllloscope adjust the peak-topeak value of the slgnal to 4 blocks. Measure the peakto-peak value of the voltage at polnt 11 of 8419 on the
oscllloscope and note lt. Next adjust the amplitude control
of the oscilloscope so that the peak-to-peak value of the
voltage at polnt 2 of 8419 corresponds to the value noted,
Connect the oscllloscope to_polnt 3 of B4t9 (R-Y slgnal)
and adjust "o" of U578 to 2{ blocks. Then connect the
oscllloscope to point 6 of 8419 and set the amplltude
control of the oscllloscope so that tle peak-to-peak value
ls the same as that prevlously noted.
Swltch off the red and the blue gun (wlth SKg and SK10
respectlvely) and set the black-whtte/colour switch to
rrblack-whlte". Adjust the brlghtness control untll the
green bars are just vlsible, then set the black-whlte/
colour swltch to rtcolourrr. Adjust R1125 so that on the
screen the 6th green bar from the rlght (there are 10 ln
total) just looses lts brlghtness. Connect the oscllloscope
to polnt 7 of 8419 (G-Y sfgnal) and adjust R1126 so that
the peak-to-peak value ls 1.4 blocks.
a
Check adjustments 1,2 and 3.
Apply the ralnbow slgnal from the PM 5507 and hrrn
contrast and saturatlon to ma>rlmum.
Connect a valve voltmeter (posltlon 30 V d. c. , posltive)
to polnt 3 of U562.
Apply a dlrect voltage of 5 V between junctlon R1029/
R1031 (test polnt ttM25") and chassls ("-f'to chassls).
Adjust th,1" and rrvil of U562 accurately to mzuctmum
meter deflectlon.
Remove the dlrect voltage and the valve voltmeter.
Interconnect polnts 4 and 5 (test polnts 'M16" and rMlTrr
respectlvely) of delay llne TD570.
Connect the Y lnput of an oscllloscope to polnt 3 of 8405
and the X lnput to polnt 3 of 840 3.
The oscllloscope now shows elllpses accordlug to one
f
f
of Ftgs .L4.
6b.
Fig.1l,b
Fig.14 o
R-Y/B-Y demodulator and G-Y matrlx (wlth PM5507)
Check successtbely the above adjustments 1,2,4a
and 5a then adjustments 5-6 and 11 under the headlng
If the red bar shows the "Venetlan bllnds" effeet,
The R-Y/B-Y demodulator 4nd the c-Y matrtx (wlth
PM 5506 or PM 5508)
Thls adjustment can only be reallsed with the aid of the
modlfled I'Colour Bar" test pattern; in thls case the
upper part of the pattern ls made up cf colour bars and
the lower part of a white area. If thts should not be the
case. flrst refer to the converslon lnstructlons Cd 583
for generators PM
-
Fig .11,c
-
5506 and PM 5508.
Check successlvely the above adjustments 1,2,4b
and 5b, then adjustments 5-6 and 11 under the
headlng trAdjustments after repalrsrt.
Set the generator to posltlon "Colour Bar",
Adjust the contrast and the saturatlon to maxlmum
and the brlghtness to mlnlmum.
Set the hue control to mld-posltlon.
Cormect an oscllloscope to polnt 12 of the picture
tube (B-Y slgnal) and ailjust for 150 Vp-p wlth preset
I'orr of U5?7,
Adjust the saturatlon control untll the voltage ls reduced
to 100 Vp-p.
- Adjust tlreset" "o"
hr these Flgs. one elllpse ls lndlcated wlth an lnterrupted
llne and one wlth an unlterrupted the.
Adjust the vldeo amplltude of the PM 5507 so that approx.
2.5 V ls obtalned ln the Y dlrectlon.
- If Flg. 14b ls obtalned, adjust ttvtt of u562 so that the
two elllpses preclsely coyer each other as shown ln
Fig. L4a.
adjuet traerf of U563 tuttll
the two elltpses colnclde (see Flg. 14b) and then adjust
fv" of U562 untll Flg. 14a [s obtalned.
- ff ftg.L4c ls obtalned, flrst
f
csz7070
of U577 agaln to 150 Vp-p remove
the oscllloscope.
- Swltch off the red and green guns with SK9 and SK8
reepectlvely. Adjust the brlghtnese, the contrast and
the saturatlon so that there ts no dlfference ln brightness between the four blue bare, and the tlue lower part
of the screen.
- Swltch on the red gun and swltch off the blue gun. If
requlred, a,iLiuiit ilrcset "oi'of IJ578 si;i;hat there ls no
dlfference ln b::1::ht;res: l:etrvct-'rr the four red bars and
the red Irler pirrl ol. the scrceil.
- S{.ttch on the glr:en grrn ard sq'itch rrlf the red gun. If
necessar]', adjrisr H1125 and Rli26 so that there ls no
dliference in brlghtness between the four green bars
and tht-; icrwcr grc*ln part cl the screen.
- Swltch on the r-ed and thc green gun agaln.
- Check adrrstment 5b.
pos.1
: L822 /,66
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pos 2 1 1822 290 80186
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4822 101 10019
4822 101 10019
V. D. R.
47 T<SI
11
4822 101 10069
4822 101 10116
4822 111 30027
4822 LLz 30145
4822 LLL 50204
4822 113 60088
4822 113 60084
4822 101 10068
4822 116 20038
4822 101 10022
10
220
4822 111 30343
4822 101 l-0118
4822 111 30316
4822 115 90077
4822 111 30003
10102
70006
20084
10019
10022
_^\
4822 103 10087
4822 103 20213
4822 103 10076
4822 LOL 20262
4822 L}L 20265
t
csz7a75
I
R1302
R1303
R1306
R130 7
R1315
R1316
R1318
R1319
R1320
Rl_321
RI322
RL327
R1330
R1335
R1336
R133 7
F,133 8
R1341
RL347
R1375
R1383
R1384
R1385
R1398
C610
C611
C623
C624
C625
C629
C639
C644
C648
C649
470
W
4822
4822
4822
4822
4822
2M2 {t
470 kO
2M2{2
330 0
330 CI
150 Q+
100 A
L20 A
L20 A
100 A
47
100
100
100
100
100
100
0
A
0
CI
CI
0
0
LOL 20263
LOL 20265
103 10079
2W
2W
4822 103 10079
150 A - 2W 4822 103 10081
2W
4822 103 10078
2W
4822 103 10082
2W
4822 103 10082
2W
4822 103 10078
2W
4822 103 10076
2W
4822 103 10078
2W
4822 103 10078
2W
4822 ln3 10078
2W
4822 103 10078
2W
4822 103 10078
2W
4822 103 10078
1K50
L2 0
35W
47 t<St
33 k0
Vew
Uaw
22
LOL 20263
LO]- 20265
A
560 ldt
L/+ w
L/+ w
c652
c 653
c 660
c672
c677
c682
c 685
c 691
c694
c 698
c 703
c708
C7L2
c 713
C7L6
c 718
C7L9
C72L
c735
c753
C755
C768
C820
C826
C833
C851
C852
C859
C860
C870
C871
C880
C881
C1431
C1433
CI435
kpF - 250 V
100 kpF - 250 V
400 pF
500 + 250 + 50 prF
16 pF - 300 V
pF
16 V
470 ttF
100 pF
33 irF
40 V
47 ttE
25 V
63 V
350 V
16 V
16 V
1000
4 trE - 400 V
4,7 1tF
8pF prF
120 pF
L20 pE
47 pP
47 pF
lpF
15pF
47 1tF
27 pF
33pF
82 1tF
47 1tF
47 1tF
250 ttF
1 t-rF
47 1.tF
500 pF 4 ttF 47 1tF'
5 kpF 4,7 ltF
33 pF
33 prF
16 pF 20.000 pF 1000 prF
330 pF
50 pF
4700 1tF
500 pF 1 pF
1 pF
47 pF
100
40 V
40 V
16 V
25 V
25 V
63V
63 V
25 V
25 V
60152
60147
50063
30181
4822
4822
4822
4822
4822
L2L 20068
LzL 20068
r24 40087
L24 40088
I24
20433
4822 r24
4822 L24
4822 L24
4822 L24
4822 L24
20417
20035
20407
20384
20366
4822 L24 2037L
4822 L24 20347
4822' L24 20066
4822 124 20385
4822 L24 20385
4822
4822
4822
4822
4822
r24 20385
L24
L24
L24
L24
2037L
2037L
20341
20357
r24 20371,
r24 20362
V
V
V
V
2,5 V
4822
4822
4822
4822
4822
L24
L24
L24
L24
L24
400 V
25 V
5000 V
63 V
4822
4822
4822
4822
4822
L24 20035
L24 2037L
124 20347
L24 2036.6
4822
4822
4822
4822
4822
L24
L24
L24
L24
L24
4822
4822
4822
4822
4822
4822
L24 4009L
r24 20428
L24 20408
40 V
300 V
2,5 V
16 V
16 V
30 V
4V
2,5 V
63 V
63 V
25 V
Push-button unlt Ut4
P. C. board of band switch UL4
Potentlometer strlp UL4
Contact holder of band-swltch TJL
I{nob 92 (flne-trurlng)
Switch SK3-SK11
110
110
110
110
L24 20366
L24 20379
L24 2037I
40 V
4822 459 20L28
4822 492 61398
4822
4822
4822
4822
25 V
25 V
25
25
63
25
Dlal wlndow of push-button unlt
Clamplng spring of p. c. board of channel
selector
Mountlng plate of control panel
Splndle of potentlometers (volume, etc " )
Matrs swltch SKL
Knob, volume , tone , etc .
4822 116 30087
4822 115 50129
4822
4822
4822
4822
4822
40V
4822 462 70698
4822 404 30051
4822 404 30052
4822 404 30053
4822 410 21068
Rear panel
Long spihdle of convergence lalobs
Strort splndle of convergence lcrobs
Convergence lmob, small dlameter
{F
100
Table protector
Cam securlng the chassls
Hinge of chassls
Cam securlng the rear panel
Push-button of m.alns swltch
2037L
20399
2034t
2037L
20024
r24 20067
20366
20433
40097
204L7
20403
L24 2034L
L24 2034L
I24 2037L
4822 459 602LL
4822 535 70345
4822 276 L0372
4822 4L3 30446
4822 2L0 40LLL
4822 466 10184
4822 101 90043
4822 290 80186
4822 432 10081
535 90678
535 90667
4L3 30448
691 10113
Convergence box
4822
4822
4822
4822
Slltch
4822 273 30t79
SK8-9-10
Knob of SK3-SK11
Caslng of deflectlon coll
Buffer rlng of deflectlon coll
Purlty rlngs
Sprlng securlng the purlty rlngs
4822 4L3 30*47
4822 276 10383
4822 410 21003
4822 691 10068
Red plug on convergence r.rnlt
Green plug on convergence unlt
4822 532 60438
4822 532 507L2
4822 492 6L342
4822 266 40029
4822 266 40031
BIue plug on convergence unlt
Coaxial plug M
Coaxial coupllng socket M
Plugs A-B-C-D-X-Y
Plugs H-L
4822 266 40032
4822 264 10036
4822 267 10036
4822 266 30055
4822 266 20045
Plugs
Plugs
Zq
E
4822 266 30054
4822 264 5005L
4822 492 60063
4822 413 40396
4822 255 70L47
-F
Holder of safety fuse
I{rrob, , focuslng
Plug holder F
Valve
Valve
Valve
Valve
Valve
holder, 10 plns, pertlnax
4822
4822
4822
4822
255
255
255
255
4822 255
holder, 9 plns, ceramlc
holder , I plns, pertlnax
holder, PL
508
holder of ptcfure hrbe
Valve holder PL504 - PL509
Valv6 holder GY501
Fllament wlndlng GY 501
-
Focus cable
HT-cable,with cap
PY500-PD500
7007L
70L39
70L0L
70097
70L42
4822 255 70044
4822 255 70L4L
4822 320 20043
4822 320 2004,5
4822 320 20035
Ring round HT-cable
Top connectlon PD 500
Safety swltch of HT-cage
4822 532 60307
4822 256 90066
4822 276 L0302
4822 2L0 40L04
4822 2L0 50064
Aerlal caslng, complete
4822 691 10143
Channel selector VIIF
Channel selector UHF
- U1416
- U1412
'ERVICE
15-4- 1 9? 1
NNATIO//I
K?0 CTV setg
Bk 41
a. S22K4e2/L6/56 - S26K497 /L5/55.
Modified: Channel selector U1417 - UHF - 4822 210 50064.
New version with built-in n+{ -filter 4822 zLB 20057.
b. General.
Modified line outprt stage, see Fig. 1.
8411 (PL504) has been replaced by PL509.
R1181 (2? kA) hae been replaced by a resistor of 47 kO.
Added: Rl180 (220 k0 - L/8 W) between 38408 and 88{08.
No longer uged: R893.
R899 (18 kO) has been replaced by a resistor of 1.8 kO.
In the filament circuit, Bl10 has been fitted in the place of B{11, and vice veroa.
RIl99 (1 Q),has been replaced bv a reeistor of 0.51 f2- 4822lfg 60088.
Added: D503 - D 504, BYL27, between 98410 ard 18410. erd between 98411
end 18411
Reagon: Reduction of diesipation of 8410 end protectlon of PL509.
c. General.
Modifted: Controls on gZ panel.
Control 92 fine tuniry wae 4822 413 3044?; hes become 4822 413 3043?.
d. General.
Modtfted: Blue and Green AdJuetment.
Added : R1312 - 8.2 kQ - L/4 W betweenpoint 2 of the picturetube and Junctlon
R1215
- Vl.
e. General.
Modlfied: R1209 hae beer. replaced by aafety regletor
Reason : Protection agair. t picture tube flashover.
f.
- 22 kf| -
4822 LLL
General.
Modtfted: R906 (470 0) has been replaced by a resistor of 680 0.
Reaeon : Improvement of stabllisatlon.
g. Generel.
Modtftcatlon brightneeB control, 8ee Fig. 2"
Modtfied : OF 161 (cR4?3) hee been replaced, by AAZ 17.
R971 (390 kQ) has been replaced by a reglgtor of 4?0 k0.
The supply voltage on R9?1 was +?. and has becmre '+3.
Added: R1108 - 1kA. R1109 - 68 Sl and R1110 - 2.2k92.
'Reason:De*eageYrt",frT,il,tffi
r
niltfi :t:$:il1""J""f,T?;;t:?"k,a*ons.
Copyrrght ror.rv.d. Confidrntiel informrtion for
Pdattd ia rhc
Nrrh{mdr
scrvicG"$tehrc CSZgg?S
BK L1
B/.1 0
PL 509
8Y127
a
R
1197
I
p1509
R
1199
R1202
1
F5
Fig
c663
A
+3
R
-21
961
R
R
971 .Y
967
\
1c662
+25
R
1110
-y
+ZS
R969
R1109
Rrlog
c3 Rl3Bo
Fi
c9299??
9.2
o
t\
{
hf
o
B3
13A