Jvc TX 3 Service Manual

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JVB

4325

FM/AM STEREO TUNER

Ab0ve photo shows for USA. and Canada

No. 2510
OCT.1979

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Contents

Page
1. Specifications ................................................................. 1
2. Main Parts Location
2-(1) Top View .............................................................. 2
2-(2) Front View ............................................................. 2
2-(3) Rear View ........................ - ...................................... 3
3. Dial Stringing Procedure .......................................................... 3
4. Exploded View and Part Numbers .................................................... 4
5. FM/AM Tuner Alignment Procedures
5-(1) Frontend Section ......................................................... 5
5(2) FM Section ............................................................. 5
5-(3) AM Section ............................................................. 5
6. Printed Circuit Board Ass'y and Parts List
6-(1) TXX-228 FM/AM Tuner and Power Supply P.C. Board Ass'y ............................ 6
6-(2) TPS-266 Voltage Selector P.C. Board Ass'y ....................................... 10
7. Packing Materials and Part Numbers .................................................. 10
8. T-X3 Schematic Diagram ......................................................... 11
9. Accessories List ............................................................... 13
10. Parts List with Specified Numbers for Designated Areas ..................................... 13
Warning When replacing the parts marked with A , be sure to use the designated parts to ensure safety.
1. Specrficatlons
PM Section 1 Stereo Separation
Tuning Range : 87.5 MHz -- 108 MHz at 1 kHz : 50 dB
Usable Sensitivity : 0.9 uV/75 9 (10.3 dBf) Subcarrier Rejection : 50 dB
50 dB S/N Sensitivity : 1.8 uV/75 S2 (16.3 dBf) (Mono) Stereo Threshold : 4.4 uV/75 9 (24.1 dBf)
9.8 pV/75 S2 (31.0 dBf) (Stereo) Muting Threshold : 4.4 pV/75 52 (24.1 dBf)
Signal to Noise Ratio : 82 dB (Mono) Frequency Response : 30 Hz- 15 kHz +0.3 dB, -2.0dB
78 dB (Stereo) De-emphasis : 50/75 usec.
Distortion at 100 Hz : 0.08 % (Mono) Output Level : 600 mV/1.6 k9
0.15 % (Stereo) (For Europe, over 500 mV
at 1 kHz : 0.08 % (Mono) :40 kHz Deviation, DIN 45301)
0.10 96 (Stereo) Antenna Input : 75 $2 unbalanced
at 6 kHz : 0.08 % (Mono) Impedance
0.15 % (Stereo) Specifications in FM Tuner section are based upon IHF standard.
Intermodulation : 0.05 % (Mono) AM Section
DiswrtiO". 0-03 % (Stem) Tuning Range : 525 kHz - 1605 kHz
Capture Ratio 1 1'0 dB Usable Sensitivity : 300 uV/m (Bar Antenna)
Alternated Channel : 70 dB 50 V (Ext. Antenna)
Selectivity Total Harmonic : 0.5 %
Image Rejection : 80 dB Distortion
'F Reject? _ =30 d3 Signal to Noise Ratio : 50 dB
Spurious Rejection : 90 dB Selectivity : 40 dB :9 kHz
RF lntermodulation I 70 dB Image Rejection I 45 dB
Rejection _ IF Rejection : 35 dB
AM Suppressuon : 60 dB Spurious Rejection : 45 dB
Output Level 2 400 mV/1.0 k9
Dimensions and Weight
. Dimensions (cm) Weight (kg)
Des'mted Am Height Width Depth Net Gross
U.S.A. & Canada 8.9 47.4 36.4 5.5 6.5
(38/16") (18-10/16) (14-5/16") (12.1 lbs) (14.3 lbs)
U.K., Australia, Europe 8.9 45.0 36.4 5.0 6.0
. 8: Other Countries (3-8/16") (17-11/16") (14-5/16") (11.0 lbs) (13.2 lbs)

T-X3
No. 2510 _1 _