Grundig T 4200 Service Manual
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Extracted text from Grundig T 4200 Service Manual (Ocr-read)
Page 2
ABGLE ICHTABELLE
75a
- ¥ ALIGNMENTTABLE
Abgleleh-Lageplan m
Ab leich
ALIGNMENT SCHEME ' Abgleich Einspeisung MeBpunkt iiinweis e Bereich f pufikt Einstellung
PLAN DE REGLAGE Alignment Feeding Testpo int. Notes Band Alignment Adjustment:
PIANO DI TAHATUHA ® L1 Point
Lw Lw Lw ® I? 105 2 ® 16,16 v + zoo mV
@ L205 mm (D W 88 MHz 9 2,31. v5 so mV
® (9 (9 L3 U VW-LUOO -----%- -
w w A4 Var. :-__ 522 kHz 1,03 v 1 so mV
"W L201. - "L- W 1611 kHz 22,73 V :2 5° V
@ @ L636 @ ©
® L4 ml 153 kHz @ 1,2 v: ~so «IV
A f = 1 kl-Iz
mod. __
1' @© (B E 3 40 kl-lz Hub/ 7 "" ®
AM 2F 2 L5 3 3 deviation
_ _ 106
not H g5; UE =< MHZ C)
(D a 5 (9
h; ,a FM
N H ®
\ at
:J-g 33 MHz ©
0 4: Max
IC203 z> <1: '
.1 (9 -> i «fl 4 1 ®
u 1 7m OUTPUT-E\ MW 612 kHz 6)
R308 M
fl 2: 1? 1503 kHz %
ZF-PROGRAMMIERUNG L2 L209 , M f = 1 kg 153 kHz
lF-PRUGRAMMING (D ® 1} " mod. z Lw '
- (D. 3:; [301 317 kHz @
fl Lg i 3 u :<
0 cl E
it it > f
R251 1
55 EE ZF Abgleich nach NW (9 Max.
C: 3 1r Rauschen
I-\_/
V-~V v @
HF-Baustein, Ltitseite 59420-03130
' FM
HF MODULE, semen SIDE
_ o<--- / _
MODULE HF, core DES souounas V Dede Allgment W ('9 0 V
later by noise Woe-fie.- -
MODULO AF, LATO SALDATURE ® Mm.
MeBsender
C 000
Stereo ® ¥ . l MOd' aus 1.9 kHz. + lOHz
-J_UE amt/[750 f Testgenerator 95 MHZ R 308 -
Mod.off
Einstellung wiederholen.
To repeat the adjustment.
ZEICHENERKLKRUNG
LEGENDE
/- . . .
no B Glelchspg. Meflger. m. Mlttelanzelge
06) 3:52:33 Egggigggi % 32:55:25 {=1 DC voltage meter with centre indicator ,
G NF-Generator Antenna 6 NF-Voltmeter
9g, AF,generator Aerial \ AF voltage meter
M Frequenzzaihler C Regler- zu é Gleichspg.-Voltmeter
, Frequency counter control closed \ DC voltage meter
000 D' italvoltmeter
MeBsender Dszilloskep 1g,
® Testgenerator GOSCillOSCope m Dlgltal voltage meter
ZF-Programmierung (30; a1; 32; as) If programming (an, 31, 32, as)
Oszillator-Baustein, L6tseite 59420-03500
OSCILLATOR MODULE, SOLDER SIDE
MODULE OSClLLATEUR, COTE sounounes
MODULO OSCILLATORE, LATO SALDATURE
Nur erlorderllch nach Austausch von Keramikliltem, Quaiz Oder pP. Vor
der Programmierung mul3 der Demodulatorabgleich nach der Abgleichta-
belle dumhgemhrt sein. '
Die Taballe fur ZF-Programmiemng befmdet sich im Schaltblld SeiteB.
1.) Gerat exakt auf die Frequenz eines Ortssenders einstellen.
2.) is! die Spannung am MPW um ca. 250 ngrOBeraIs an MPV ,muB
die derzeltlge ZF~Programmierung um 50 kHz erhbht warden.
Bei elner Spannung von ca 125 mV, ist eine Erhdhung um 25 kHz not-
wendig. (60 mV = 12,5 kHz).
3 lst die Spannung am MPVkleiner als am MPW , so muB bel
-125mV die ZF Programmierung um 25 kHz bzw. bei--250 mV um
50 kHz zur densitigen ngrammlerung verkleinert werden.
4) Der Nulldurchgang kann i40 mV Toleranz aulweisen.
Only necessary if the ceramic Or Quartz filters or the microprocessor have
been replaced,
Programming can only be carried out after demodulator alignment has
been completed in accordance with the alignment table.
The table for lF tuning is included in the circuit diagram, page8.
1.) Tune the receiver to the exact frequency of a local transmitter.
2.) lithe voltage measured at test point Wexceeds that measured attest
point by some 250 mV, the current IF programming must be in-
crease by 50 M; It the voltage difference is approx. 125 mV, program
ming must be increased by 25 kHz (60 mV = 12.5 kHz).
3.) li a lower voltage is measured attest point W than at test point V,
-125 mV requires a 25 kHz reduction in programming, and a 50 kHz re-
duction Is required it the difference is -250 mV.
4,) A tolerance of :40 mV is permissible for zeroing.
4