Zanussi 22ZT907 User manual

TIP
ZANUSSI
ZANUSSI
Model / Chassis
22ZT907
BS-400.2 CHASSIS
ZANUSSI
SERVICE MANUAL

ZANUSSI
SERVICE DEPARTMENT
SETCO/ACF
Model
22 ZT 907
C. 430-2-1982
(UK) (54)
Zanussi Elettrorrica S.p.A. reserve all legal rights
to the exclusive ownership of this document and
hereby prohibit reproduciion or disclosure of the
same without their prior permission.
. :
*
.-

CONTENTS
- GENERAL FEATURES ....................... 1
- CONTROLS ON THE RECEIVER ............... 2
- ACCESS TO INTERNAL COMPONENTS .......... 4
- VIEW OF CHASSIS AND OF DISCONNECTED
PLUG-IN TYPE P.C.BOARDS ............... 5
- REFERENCES FOR MAIN ADJUSTMENTS ........ 6
- TRANSISTORS
............................ 8
- INTEGRATED CIRCUITS .................... 10
- MAIN COMPONENTS ........................ 12
- ADJUSTMENT PROCEDURE ................... 16
- TELETEXT TRANSMITTER ................... 24
- PROCUCT SAFETY NOTICE ................. 33

:‘!;
‘. _: .:
_:,, : :.
.
:: ‘:,.“i
:
:.
GENERAL FEATURES
..“..,.,
i_Y,,.”
._‘.,._.
CHASSIS
PICTURE TUBE
POWER SUPPLY
POWER ABSORBED
EHT
MAX. BEAM CURRENT
: BS 400.2
: 22" PIL s 4
- A 56-701 X
.
.
240V AC +10% 50 Hz
:
Medium/maximum 110/140 W
:
24.5 kV
.
.
1.1 InA
ANTENNA INPUT
TUNER
TUNING SYSTEM
PRESELECTION
AFC
REMOTE CONTROL
REMOTE CONTROL
ABSORPTION
CLOCK
: 75 Ohm
.
.
Varicap integrated type
.
.
Electronic (voltage synthesis type)
.
.
16 TV programmes and VCR on programme
16
:
Insertable through pushbutton
.
.
{
IR type. Max. range approx. 8 m
TRANSMITTER In stand-by
< 20 /uA
In operation < 9 mA
: Electronic programmable type with
digital hours and minutes indication
AUXILIARY OUTPUT JACKS
LOUDSPEAKER
AUDIO OUTPUT
STANDARD
DEGAUSSING
DIMENSIONS
WEIGHT
: Headphones jack 8 Ohm DIN 45327
Tape recorder 47 kOhm DIN 41524
External loudspeaker jack 2.7 Ohm
DIN 41529
: Lateral woofer and frontal tweeter
.
.
15 W
.
.
CCIR
- I PAL
: Automatic
: 55x55~42 cm
.
.
29 kg
.
-l-
.
. *-
*. .-

CONTROLS ON THE TV RECEIVER
Front controls
1. Electronic clock
.2. Control panel *cover
3. Switch-ON & programme
sequential channel change
control
4. Digital programme dispaly
5. Stand-by switch
6. Output jacks recess cover
7. Remove control receiver
8. Clock brightness control
9. Clock reset - hours H
10. Clock reset - minutes M
11. Volume
12. Tone control - treble
13. Tone control - bass
14. Brightness
15. Colour control
16. Contrast
17. Clock programmer
18. UHF band indicator light
19. AFC indicator light
20. AFC pushbutton
21. Station scanning control - S
22. Fine tuning regulation
23. Tuning sequence lights
24. Recording jack
25. Output jacks foldback release
26. Headphones jack
-2-

Rear sockets
27. Auxiliary speaker jack
28. Aerial socket
29. Clock battery recess
-3-

_‘.
:i’ ,: ,:,
ACCESS TO INTERNAL COMPONENTS
To remove back panel:
1. Insert a blade screwdriver into "A";
2. Push down retaining lug “B” ;
3. Release bottom part and remove panel.
i
.
-a_

,. -:
,.
.::,
.:,._ .:’
BS 397
BS 398
BS 399
BS 4 .a
VIEW OF CHASSIS AND OF DISCONNECTD PLUG-IN TYPE P.C.BOARDS
BS 400
LEGEND
BS 400.2
BS 417
BS 395
BS 396
BS 418
BS 399
BS 398
BS 397
Chassis
Power supply p.c.b,
Line output p.c.b.
Synchro.
separator and pincushion correction p.c.b.
CRT discharger p.c.b.
Video p.c.b.
IF unit p.c.b.
Vertical deflection p.c.b. A
BS 417
BS 395
BS 396
*. .-
-5-

REFERENCES FOR MAIN ADJUSTMENTS
::..
:
i.. ; ;y;,:
.: ‘I. ..,_.:.
‘:.
1:
.:;._I
i.::. ;r
.( ,.,,
.:...
,.,’
. . ,;’
‘.
.;
,;.:. “i ‘;;
”
._ ,’
s 417
P 303
301
LEGEND
Pl
P 351
P 352
P 353
P 354
P 551
BS 418
SW 553
SW 552
P 552
SW 551
BS 417
.P 303
P 301
P 401
P 402
P 403
AGC adjustment potentiometer
Vertical linearity adjustment potentiometer
.
Vertical frequency adjustment potentiometer
Vertical amplitude adjustment potentiometer
Raster adjustment potentiometer
Potentiometer for (grid-2) adjustment of picture tube
CRT discharger p.c.b.
Switch for blue electron gun
Switch for green electron gun
Focus adjustment potentiometer
Switch for red electron gun
Power supply p.c.b.
Potentiometer for adjustment of +12.6v DC
Potentiometer for adjustment of +15OV DC
Oscillator frequency adjustment potentiometer
Pincushion adjustment potentiometer
Horizontal amplitude adjustment potentiometer
P 401
402
P 403
*. .-
-6-

BS 395
BS 396
BS 397
BS 398
BS 399
P 108
P 109
P 106
P 107
P 104
P 105
P 103
L 102
C 123
Line output p.c.b.
Synchro.
separator and pincushion correction p.c.b.
Vertical deflection p.c.b.
IF unit p.c.b.
Video p.c.b.
Peak-to-peak adjustment potentiometer (blue)
Black level adjustment potentiometer (blue)
Peak-to-peak adjustment potentiometer (green)
Black level adjustment potentiometer (green)
Peak-to-peak adjustment potentiometer (red)
Black level adjustment potentiometer (red)
Potentiometer for adjustment of direct signal level
Burst phase adjustment coil
Capacitive trimmer for oscilloscope adjustment