Jvc SEA 80 Service Manual

Page 2

Contents

Page

1. Specifications .................................................................. 2
2. Descriptions

Z-(1) Panoramic Spectrum Analyzer 3

2-(2) Pink Noise ............................ 3
3. How to Operate the Panoramic Spectrum Analyzer .......................................... 4
3-(1) Measuring the Frequency Spectrum of a Sound Source ................................ 4
3-(2) Measuring the Frequency Spectrum of Program Source such as Tapes, Records and Broadcasts ...... 4
3-(3) Measuring the Transmission Characteristics in 3 Listening Room .......................... 5
4. How to Compensate for Room Acoustics ................................................ 5
5. How to use S.E.A. during Recording ................................................... 6
6. New Technologies
6-(1) Block Diagram ........................................................... 7
(Hz) Semiconductor Inductor .................................................... 8
6-(3) Graphic Display Circuit ..................................................... 9
6-(4) Pink Noise Generator ...................................................... 10
G-(5) Graphic Equalizer DC Amplification ............................................ 10
6-(6) Service Precautions ........................................................ 11
7. Adjustment Procedures
7-H) Center Voltage Adjustment .................................................. 11
7-(2) Gain Adjustment ......................................................... 11
8. Removal Procedures
8-(1) Top and Bottom Covers ..................................................... 12
8-(2) Graphic Display .......................................................... 12
8-(3) Graphic Display Driver (TXX-189-1) P.C. Board Ass'y ................................. 13
9. Main Parts Location .............................................................. 14
10. Exploded View and Part Numbers
10-(1) Front Panel ............................................................. 14
10-(2) Front and Chassis View ..................................................... 15
1043) Rear Panel .............................................................. 15
11. Connection Diagram .............................................................. 16
12. Printed Circuit Board Ass'y and Parts List
12-(1) TXX-189 Graphic Display Driver, Filter, Pin Jacks and Shield P.C. Board Ass'y ................ 17
12-(2) TXX-190 SEA Amp., MIC/MIXER and Pushswitch P.C. Board Assy ....................... 19
12(3) TXX-191 Semiconductor inductor and Slide Volume P.C. Board Ass'y ..................... 22
1244) TPS-222 Voltage Regulator P.C. Board Ass'y ...................................... 24
12-(5) TPS-224 (or TPS-197l AC Primary P.C. Board Ass'y .................................. 25
13. Accessories List ................................................................. 26
14. Packing Materials and Part Numbers ................................... 26
15. Parts List with Specified Numbers for Designated Areas ....................................... 27
16. SEA-80 Schematic Diagram ......................................................... 28, 29

SEABO
No. 2478 _ 1 -