Teleton CS-400 Service Manual

SERVICE MANUAL
MODEL CS—400
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(Edition B) Jan, 1975
TELETON Electro GmbH. + Co. KG
4000 Dusseldorf-Rath Oberhausener Str. 17
Tel. (0211) 65 30 81 TX 858 6768
TELETON Electro (UK) Co., Ltd.
Teleton House, Waterhouse Lane,
Cheimsford/Essex
Tel. Chelmsford 62 442 TX 93 338
Technical Service Organization
Waterhouse Lane, Chelmsford, Essex.
Tel. 0245-54621 TX 99338
TELETONN. V.
2200 Borgerhout
Prins-Leopold-Straat 28
Tel. 03/361045 TX 32508
03/357670
Belgium
TELETON NEDERLAND
Nieuwe Herengracht 119
Tel. 24 83 81
Amsterdam
TELETON Electro (France) S.a.r.|.
21 rue Paul Lafargue 94 Kremlin-Bicetre
Tel. 726 4091
TRANSACO AG
Kanzleistrasse 126 8004 Zurich
Tel. 39 45 60/23 5040 TX 52 362
For disassembly please see exploded view.
ADJUSTMENT INSTRUCTIONS
1. Adjustment of Main Amp.
When transistors Q311, 312, 313, 314, 315, 316, 317, 318
are exchanged, the following adjustment is necessary:
1-1 Measuring Equipment
(a) DC Current Meter (100mA Maximum)
(b) Oscilloscope
(c) Dummy load 30W
1-2 Condition of the Set
Middle Position (a) Treble ..........
(d)Balance .......... Middle Position
(g) Function Switch. ..... AUX
(h) Speaker Switch ...... A or B
(i) Tape Monitor Switch . . . ON
1-3 Adjustment
(a) Set VR301.VR302, VR303, VR304 to meckanical cen-
ter Position (AA-400 P.C. board) .
(b) Connect the DC Current Meter to Fuse Terminal (AA400
P.C. Board L or R)
@: Terminal No. 21
©: Transistor, collector side( L: Q315 R: Q316)
(d) Repeat procedure (a) ~ (c) several times.
(e) Add the signal of 1000Hz, G(OOmV ~1V tp tape input,
and adjust Volume Control for Clipping level of
speaker (or dummy) output.
(Tape Monitor Switch : ON Mode Switch : MONO)
(f) Adjust VR301(L) & VR302(R) to obtain the symmetrical
sin-wave.
(g) Repeat procedure (e) ~ (f) several times.
2. AM | F Adjustment
2-1 Measuring Equipments
(a) AM Standard Signal Generator
(b) Output Meter (V.T.V.M)
(c) Oscilloscope
(d) Dummy Load 82. 30W
2-2 Preparation of Adjustment
(a) Volume: Max., Mode: MW, Others: same as procedure 1-2
(b) Measuring Connection is as follows:
AMF -400 AM Frantend P C Board Terminal ®
Osedh te ope
{——- -4 Dummy {oad
10K 9.01 anna "eemmes ¢ 0 Be
Bee oe a ee med
Seep Sete eee ce oS C. ; dons BQ i
[SB.QU1 HOW Le
Ssteaedaesd
'eo dial Generator
Figure 1
VAIOA
1K&
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I1C103
LASIOO
T104
O
mu
CFU-1002
8}
T109
L102 K413 THO
WM 14033
1101 TPI T105
C24 IQ 9
Tt06 T107 JVR103
aa cay 50K82
HF-400 IF P.C. Board
Figure 2
2-3. Adjustment
(a) Set S.G. to 460 KHz (Mod, 400 Hz 30%) 80 dB, and
adjust IF cores of T1104 and T105 for maximum output
reading. (See Figure 2)
Adjust the Attenuator of S.G. according to increase the
output, and put the output reading to 500 mW (2V).
(b) Repeat procedure (a) several times.
i AM Tracking Adjustment (Adjusting procedure for LW, MW,
and SW) (See AMF-400 AM Frontend P. C. B. )
3-1 Measuring Equipments
(a) AM Standard S.G. (including loop antenna)
(b) Output Meter (V.T.V.M.)
(c) Oscilloscope
(d) Dummy Load 82 30W
3-2 Preparation of Adjustment
(a) Volume: Max., Mode: LW, Others: same as protedure 1-2
(b) Measuring connection is as follows:
MW. LW SP 4 ohn
Bar Antenna OSC Uta se apie
Mod. 400 2.4%
Figure 3
Figure 4
Note: All adjustments for rnax. Output.