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MANUAL
1 Stereo module
69113789

1
CT 2570 UK
Ident-Nr. 5436 03 00

RF-IF module
5829 02 58

)

CT 2870 UK
Ident-Nr. 5436 03 10

Replacement
When A Safety ordenng components

parts list
spares please in accordance quote item with and existing order number. When These ordenng components (sub-)assembks must only (modules), be replaced gwe the assembly component number parts in addition!

regulations.

by original

CT 2570 UK
Cab,net Front plate blind ""0 lid un,t Ikd 61128636 64172606 64110720 86870281 a681 10 06 a251 44 19 qrllle 6466 37 36 8642 0148 6214 $068 8624 47 10 78640221 A 59 ECF 00 X 01 SEL tube A 43622555 6141 0305 735128 A 45880524 coil 89.15~ 868172 43110715 73680196 8625 11 63 86251164 8625 48 09 a642 75 05 631536 la 15 46

CT 2870 UK
Cablnet Front plate blind U",t Ild umt I!d 61122861 64172985 64110721 a687 02 a2 8681 1006 a251 44 19 grille 6466 37 36 a642 0148 qrey 62140959 8624 47 10 18640221 A 66 ECF 00 X 01 SEL tube for earthmq tube A 43622803 6141 0305 7351 28 48 8623 3140 A 4588 05 24 toll an. IOW 86817215 431107 43110921 7368 0196 8625 11 66 8625 1165 631536 86254809 a642 75 05 2.2 UF 100 V 342175 52 18 15

Loudspeaker Operatlnq Holder

Loudspeaker Operattnq Holder

for operatmq

for operatmq

Grille for mdlcator WIndow Pad Rear couer Holder Screw Picture for rear cover for pcture tube tube for lndlcator

Grille for lndwxtor Window Pad Rear ccwer. Holder Screw Plcture for lndlcator

for rear cover for picture tube tube

Earth for plcture Sprlnq devtce

Earth for pxture Spnnq Holder dewce

for earfh,"q co11

Deqausslnq

for picture cal

Hook for deqausstnq Loudspeaker Holder Chaws Chassis Holder Plunger Matns Holder for loudspeaker conduct, co"duct. left rlqht

Deqausmg

Hook for deqaussmq Loudspeaker Loudspeaker Holder Chassis Chassis Mains Holder Plunger for loudspeaker conduct. conduct, pushbutton left right

4 S!. 10 w

for STEREO-Modul pi" for RF module pushbutton for decoder

8625 47 07

for STEREO-Modul PI" for RF module

c 3951396 Holder for decoder

8625 47 07

When re-ordering

manuals, please quote the model name and part number.

66117924(104)S

Picture

and sound

IF-adjustment
30 42 MHz. max. output 200 mV 5 5 MHz. dispersion k 15 kHz, f,,. Sens~t~v~ry 10 mV/cm 1 V/cm adjustable from 0 10 V Preparations: !&as voltage instrument to TZ 214 Check must be at the upper end of the co11 = 1 kHz U V 12 V i 10% at TZ 23 The cores

Required measurmg equipment: sweep generator Wlfh marker tr="Smltte, SIgnal generator. Oscillograph: RF rectifier probe B!as voltage ,nstrument

NO.

Stage to be adjusted Test arcu~t 1. Sweep , gen. ",a 15 pF to TP 2 / (UHF tuner) approx I 300 mV TP 203/204 to

Connect.

oscillor. I

Adjustment

procedure

~ Oscillograms

Remarks

11

UHF/IF

filter

Osc~llo. ",a probe to TP 101/102 Ampiltude 10 mV/cm See Fig 1

Adjust to max. amplitude and level roof with L 62and L 64 (VC and SC must have the same helghf) Bandwtdth can be narrowed wth L 63.

I
12 UHF/VHF/IFfilter

1 Test c,rcu,t 1 Sweep I g en. "aa 10 nF to TP 6 (UHF tuner) approx. 20 mV TP 4 to earth Test c,rcu8t 2 Sweep (4.1) to (approx.

2

Reference

circuit

transformer TP 2011202 20 mVI

gen "Ia mterstage
' Osc~llo. ",a probe to TP 2031204 Amplitude approx 20 mVicm 1 See Fig 2 I 1 Adjust to max amplitude and level roof wth L 161 and L 162 (BT and FT must have the same height) Osc~llo to TZ 24 Amplitude 450 mV/cm Tune frequency marker 38.9 MHz to max L206 (UK = 39.5 MHz) amplttude with wa ( ' Set frequency marker 36 MHz to 1.7 V,, - 0 d0 with bias voltage at TZ 214 Marker 36.9 MHz should Ile between - 5 dB and - 7 dB. marker 34.5 MHz between - 3 dB and - 5 dB. I Osc~llo to TZ 31 Adjust R 233 on 761 mV,,. SIgnal generator osz"`o to Tz33 ' Tune / L 226 CL2361 to AF max. and ml" dlstortlon factor

/

A
~ I

",

389YHI -".~.,-"m,

3

Monitoring 1 frequency response

of IF

Attenuatnn xc. tq test ClrCult 3. TP 102 to earth ) 2.2 "F' x / Test circuit 2 Sweep ~ gen. via Interstage transf Osc~llo to T 24 Amplitude 0.5 V/cm ~ (4.1) to TP 2031204 (approx. 150 mV1

Y,5"*2

52

DF-AF

( ~zx;,;k~; I

1 I

5.3

Some voltage level from sound channel 1 and channel 2

Signal generator5.5 MHZ on TP 211 and 5.74 MHz ~ on TP2,2

Osc~llc Ti! 33

to TZ 31 and

Tune sound channel 2 wth R 225 (R 233) to have the same haght wt sound channel 1 (appr 1%).

Swtch the respectwe term,"& of TZ 3liTZ 33 to earth v&h 10 nF capacitors

60

1 Monitoring of video signal

With the ald of a standard

modulated

N transmitter.

the video output

voltage

should

be 2 V,,

+ 0.2 V

Abb. 1 Probe for RF tuning

Abb. 2 Probe for tuning of the IF coil

Test circuits

1

Test circuits

3

_. _ _ _ _ MS, PARALLELTON 5T"FE (51 PARALLEL SOUND STAGE

I

Instructions for dismantling: Turn the two red plunger pins by 90" Remove module from bracket (Fig. 1). 1. Apply pressure to the plate channel simultaneously with both thumbs, until the cover seaming bends, then remove cover (Fig. 1). 2. Before the cover can be put back on, the plate channel must first be pressed back into its proper position from the InsIde (Fig. 2). 3. Put cover back on.
Raststift Plunaer p,ns

Ambedue

le spme

Gegenstand Item Pike Ricambi

1

Bestell-Nr. Order no. N` de corn. No. di rif.

Gegenstand Item Pi&x R'cambi

Bestell-Nr. Order no. N de corn. No. d, rd.

HF-ZF Modul (Kabeltuner) RF-IF module (Cable tuner) Module HF-BF (Tuner pour rhseau cable) Modulo MF-BF (Tuner a larga banda)
TDA 5030 U664B TDA 4427 A TDA 2546 A BF 989 BF 996>E 6327 BF 569-L BF 569-E 6327 BF 550 BC 848 AF EB 221-S? MOS MOS IC 161 IC 171 IC 201 IC 202 Tl T, T 41 T 61 T 162 T 163 D 1 21 22 41

5829 02 58

3761 1725 3775 05 73 3761 1623 3761 1358 36110711 361107 13 36120711 361207 13 3612 07 25 36145321 3651 0525 I ~

D 160 161 LL 4148 L 202 Drossel i Choke 1 Bob L 2051245 F~ifer / Filter / Flltre / Filter ! Filter / Flltre i L 206 L 207 Drossel i Choke I Bob L 210 DrosselI Choke 1 Bob Spule i Co11 i Bobme L 211 L 226 236 Filter 1 Fflter 1 Flltre i Drossel I Choke f Bob L 244 F 201 OFW G 3205 F 201 OFW J 3203 F 202 Filter ' F,lter I Fiitre Anschlufllelste 34pollg ' Female piug 34fold Reglette a doullles. 34fo1s I Sp~noft~era 34~011 G?hausedeckel Cabinet can top B3her parte super~er I Coperchlo schermatura Antennenbuchse PIIse pour antenne Antenne I press socket per antenna

de sell 1 Boblna Filtre 38.9 MHZ F,ltre 38.9 MHz de se" i Bob,na de setl i Boblna i Bob,na Fllfre 5.5 MHz de sell / Bobina F~ltre

~ ~ I ~

36560311 4557 16 29 45553022 45553023 4557 1649 4557 16 25 4544 07 46 4555 30 24 4557 16 25 45558552 4555 85 53 4555 84 15 41451675 83164501 41439045

i I

RF-IF module
5829 02 58

L I---+

UHF"DRSTUFE
UHF PREAMPLlFiER

n-n--.-E K

- h-2 "

_--.

___

Stereo
6911 37 69

module/C

II I

module/Operating

unit

D/2

After changing

or repaiflng

a module, check the oscillator

frequency

and adjust if necessary.

Pllo, *Igtul l Ilgnment

F.6 ,.-

-----

1

;\

I

18

TDA 8371 AMPLITUDENSIEE, HOR U "ERT OSZltLATOR SYNC SEPARATOR HOR A "ERT OSClttATOR

CIRCUIT0 ALiMENlAZtONE RRE

Please note: When exchanging exchanged.

T 701. IC 701 must likewise

be

e

----P----P.-~-.

NETZVERWNDEN / MAINS CONNECTED COLLEGATO ALLA RETE

NETZGETRENNT

i

Chassis
5861 75 22

Compact

D/2 FST

P1

69'

3

-

TEAZOlLA , VIDEO-SCHALTER VIDEO-SWITCH INTERRlJTTORE VIDEO , 1 I"

K 3101
.Q 12" #i+

AB-

r

With the equpment

swttc

1
9 a 0

VeR Amplotude Vert. ampl,t"de Amolltude vert Ambezza verwale Her Amplitude Her amplitude Amplatude her Ampiezza onzzontale Vert EMage vert picture slvft "BR de I image Pos verncaie lmmaglne HOT 811dlage Her picture shift Pas her de ,`,mage Pos OrlzzOntale lmmaglne Vert Frequenz vert frequency Frequence vert Frequenza verwale HOT Frequenz Her frequency Frequence her Frequenza or,zzontale Sandcastle

POS
~2;L," Camp colour stgn CLSS i CLSS vert Imp

-i *W

40 0S

CD

i -as 60 01

e

A
-

NF-Sagn AF sign BF sag".

a.* ..0

865 10

-~

RENNT / MAINS ISOLATED `0 DALLA RETE. -.-.--

~-

-CompacIChassis D/Z llO"FST 5661 75 22

PAL Decoder
6911 30 28

R410 2:
@ :v 8 1:; Q ii

PAL - DECODER

lmportanl
Follow,~g exe c r t board h; Thedexder Standard PAI mum ad br,;

With the equipment

switched to stand-by, the voltages of the switched-mode

power supply and the horizontal

output stage are below nomlnal value.

Vert Amplitude `Jerl ampl,tude Amplcude ven Ampiezza Hor Amplitude HOr ampl,tude Amplntude her Amplezza cmzzontale

vmcale
FHT-I Sub-8 Oscil Oscil PALPAL I Demo Demo Filtre Fillrc (D.X (Deem

Ven Frequenz ven. frequencv Frequence v&t Fwquenza verwale Her Frequenz Her. frequency Frequence tvx Frequenza orizzontale Sandcastle

NF-Stgn AF s,gn BFsign
BF sign FBAS-s,gn. Camp coio~r sign CLSS i ass kl Imp

G B
SEC1 (Dee' (oec SEC1 (Dee -(DW

Her mp

CRT.
_--~-.-.-.-.-.--.-.-.-.-.IVIDEO ENDSTUFEN UND EILDR6HRENANSCHLUSSPLAnE wlE0 oum STnGEs AN0 PICTURE TUBE CoNNEcTlffi BOARCJ ,STADlO FINALEvlDEO E PlpsTRA COLLEGI\MENTO DEL CINESCOPIO

base board
--.-.-,

.-.---.-.

Important:
Followg exchange or repair of the colour decoder. ensure that the adait~onal c r t boara has been re-establlshea before swltchxnq on the set The de:.oder waveforms are taken under following conalt,ons Standard PAL that IS. SECAM coiour bar pattern. contrast at maximum aid brightness and colour saturation at nominal value

\
earth connection

PAL SECAM Decoder 6911 30 3016911 30 29 "9 PAL Decoder 6911 30 26/6911 30 26 FHT-Oszillator Sub-carrier oscillator Oscillateur FHT Oscillatore FHT c 875 annaherna stehende Farblnformatlon near stationary colo"rs sur I'mformatlon de couleur presque su Inf di coiore appross,mafa

-

12 V kontr.,cont

stable

PAL-Dematrix PAL dematrix Dematrice PAL Dematrice PAL

LB84

verschwlnaende &louse urn Feld .G-Y - 0" minimum Hanover bars I,, "G-Y - 0' SLIT ~&USE dlsparalssante dans ie Champ `
~ R 883

Glockenlilter Bell-jar filter Filtre de c&he Filtro a campana [Decoder 6911 30 30) [Decoder 6911 30 29)

I j LB10 1 /

/ verschwndenae Jalouse I", Feld + V i " m~"r""m Hanover bars I" + V i" sur jalousie alsparaxsanle dans le champ + V i u I" modo da ottenere una delle str~sc~e nel campo

DaR die Amplitude belder Zellen be1 schwarz/welR und wahrena des Frequent-Nulldurchganges glelch slnd I That the amplitude 01 both lines IS the same with blacklwhw and during zero frequency passage De SOrte q"e les amplitudes des deux lignes Solent identtques. en "nr et blanc et durant le passage par zero de ia frequence Che I'ampiltudine dl ambedue ie rlghe nel case di blanco e nero e durante 11 passagglo aella frequenza per IO zero 518 uguale j Schwarz- u WelOpegel = deckungsglelch zu Austastpegel 10 where the black level and the white level coincide on the blank,ng leve, i I'egal~satlon du wea" "01r et nfveau blanc qu'll sort s~tue au niveau de suppression I" mado the II l~vello del nero e quello de1 blanco siano congruentf sul l~vello d, tancella~~one

spmmne
<, ~ + v t u

FuBK-Testblld ! Test picture ) mre 1 mmag~ne di test

i SECAM-Discrim. [Decoder 6911 pecoder 6911 SECAM-Discrim. [Decoder 6911 (Decoder 6911 (R-Y) 30 30) 30 29) (B-Y) 30 30) 30 29)

OSCL a10 0 Zwe~ Zellen "bereini anderschrelben. Adjust to converge two consecuf~ve lines Ecnre 2 ilgnes i'une sur I'autre Scrwere 2 rIghe ""a sovrapposta all'altra

SECAM-Farbb Colour bar sfgn rmre de couleur bane df coiore

L 830 / 1 L 835

IFB 473 UK
58831490 Indicator board
LTO 6LtO G Awl

0 -r 51`01 n

Program

board

Base board

Hint for connecttng Because of the ever mcreas~ng number of lnterferance sources and their negatwe etfe only shlelded (75 ohm) antenna cables and antenna plugs (DIN 45325) should be use, possible Interference suppress!on Unshielded antenna cables. balanced-to-unbalam and antenna plugs often prove lnsufftclent for In!erference-tree reception. .

antenna

Repalr tips
1. With dlsconnectedswltchlng stage T 701 (base open), the power supply 15capable 01 As no output voltages are generated I" this co"d,t,o". the IC 601 IS wlthout SUPPly "( m other words. the power supply is not synchromsed. Rectangular pulses w,th approx 14.6 kHz are measureable at Pin 14 (IC 7011. However. the IC operates I" so-called Interrupt mode, 1.e the pulse voltage at Pin ' 200 ms. N. B. If the swtchmg stage IS dlsconnected. the electroiytlc capacitor C. 656 mi re-con"ectnon (soldering) 2 With disconnected hotl?ontal cutput stage ,e.g termma, 4 Tr 501 open, and a repla of D 733 (60 watt lamp). the power supply delivers approx 110 V (Compact D) ca. 3 If the T701 (ON 4046) falls repeatedly. the followng components should be replac even If these are OK according to the ohmmeter, and C 704 4. For servnng the set under operatong condltons when the election~c fuse has a< ~CIOSS C 700 (C 713) If the eiectronlc fuse cuts out due to a momentary over1 re-started by swltchmg the mans swtch off and the" on agal"

Indicator

board, IFB 473/483

4

Chassis

board / CRT.

base board / Color decoder

board

FLOF decoder 6911 1159

cm SW RAM STATIC RAM

SAA j2LO PIA SAA 5210 PI0

m

BUS-WANOLER BUS-CONVERTE IM BUS -mm

I

I

g
.

m

25 I+T ERZEUGUNG FUR ZWISCHENZEILENABSCHAL~UNG

L
NNUNG OER VT-SIGNALE I a Cz.0`1 33 B 2 C30`2 .I I3 `6 NAB 8`61 2 VT-PROZESSOR -PROCESSOR , 12 1 28

u

n M03 Pay attention

to protective

measures

for MOS components!

BUS-WANOLER BUS-COlrVERTER IM BUS * !a BUS

I

Decoder
IC IC IC IC IC IC IC IC IC IC 3001 3002 3003 30M 3005 3006 3007 3006 3009 3010 TEA5114A SAA 5231 SAA 5240 CXK 5864 AP 10 L MAB 6461 P MEA 2050 SAA 1272 C HEF 4001 BP HEF 4006 L 7805 ACV BC 048 B BC a58 c BC a47 c ZPD4148 F LL 3.3 Drossel Drossel Drossel / Choke i Choke / Choke I Bobma i Bobma I Bobma i MOS MOS MOS MOS MOS MOS MOS MOS MOS

69111159 3766 11 53 3779 15 38 3779 15 40 3776 01 59 3777 51 21 3779 11 61 3779 11 31 37715107 377151 a9 3768 17 65 36145322 36145423 36145313 36531744 36560311 4557 17 62 4557 16 66 4557 16 37 4421 31 07 442131 a0 41563075

3011

1 ~

I

T 3001 .3004.3006 3007.3009 T 3006.3011 T3010 D 3001 3002 L 3001 L 3002 L 3004.. .3oc6 x 3001 X 3002

I

zOcCOl0
IC-Fassung. 14 pol!g / IC socket. Zoccolo del IC. 14 poli 14 fold / IC-Fassung. 16 pollg I IC socket. Zoccolo del IC. 16 poll 16 fold 41563076 41563077 IC-Fassung. la poilg 1 IC socket. del IC. 18 poll 18 fold IC-Fassung. 40 pollg 1 IC socket, ZocColo del IC. 40 poll 40 fold 41563080 65247303 Kuhlblech fur IC 3001 / Heat sink for IC 3001 Aletta dl raffreddamento per IC 3001

Ouarz i Quartz / Quarzo 13.875 MHz / Ouarz / Quartz / Quarzo 6 0 MHz