Jvc RS 77 Service Manual

Page 2

Contents

1. Specifications ........................ 1 10. Printed Circuit Board Ass'y and Parts List
2. Names and Their Functions 10-(1) TXX-267 Main Amp., Power Supply and
2-11) Front Panel ..................... 2 Other Functions Split P.C.
2-(2) Rear Panel ...................... 3 Board Assy .............. 10
3. Removal Procedures 10-(2) TXX-268 Equalizer, S.E.A. and Other
3-11) Top Cover and Bottom Plates ......... 4 Functions Split P.C. Board
3-(2) Power Transistors ................. 4 Assy .................. 13
4. Main Parts Location 10-13) TXX-269 Logic and Counter P.C. Board
4-(1) Top View ...................... 5 Assy .................. 15
4-(2) Front View ..................... 5 10-14) TAP-283 S.E.A. Control P.C. Board
4-(3) Rear View ...................... 5 Ass'y .................. 17
5. Exploded View and Part Numbers ........... 5 10-15) TFM»924 FM/AM Tuner P.C. Board
6. Block Diagram of Digital Synthesizer ......... 7 ASS'Y ------------------ 18
7. Pin-plug to Pin-jack Connections Diagram ...... 7 11. Accessories List ....................... 21
8. FM/AM Tuner Alignment Procedures 12. Packing Materials and Part Numbers .......... 21
8.(1) FM Section _____________________ 8 13. R 3.( 2) AM Section _____________________ 9 14. Parts List with Specified Numbers for
9. Power Amplifier Idling Current Adjustment Designated Areas ---------------------- 24
Procedure ........................... 9
Warning:

When replacing the parts marked with A , be sure to use the designated parts to ensure safety.

1 . Specifications

FM Tuner Section (Figures are based upon IHF Standard) Amplifier Section
Tuning Range :879 MHz 7107.9 MHz RMS Power :60 W per channel at 8 9
(875-1080 MHZ for 50 KHz step) (Both channels driven,
Usable Sensitivity (IHF) : 10.3 dBf (1.8 uV/300 Q) from 20 Hz to 20 kHz
50 dB Quieting Sensitivity with 0.005 %
Mono : 14.8 dBf (3 pV/300 S2) RMS Power 1 65 W per channel at 8 9
Stereo : 37.2 dBf (40 uV/300 9) (Both channels driven,
Distortion at 1 kHz)
Mono : 0.15 % (1 kHz) Total Harmonic Distortion: 0.005 % at rated power
Stereo :0.3%(1kHZ) 20 Hz-20 kHz,8§Z
Signal to Noise Ratio 0.001 % at rated power 1 kHz,
Mono :80 dB (68 dB, DIN) 8 9
Stereo : 70 dB (62 dB, DIN) Input Sensitivity/Impedance
Selectivity 2 80 dB, i400 kHz Phono : 2.5 mV/47 kg
(65 dB,300 kHz,D|N) Aux : 180 mV/43 k9
Capture Ratio : 1.0 dB Tape Play : 180 mV/43 k9
IF Rejection :100dB at 98 MHz (180 mV/43 kQ,DIN)
Image Rejection : 78 dB at 98 MHZ S.E.A. Graphic Equalizer
Stereo Separation : 45 dB at 1 kHz Center Frequencies : 40 Hz, 250 Hz, 1 kHz, 5 kHz
AM Tuner Section and 15 kHz
Tuning Range : *530 kHz - 1620 kHz Comm Range ; :12 dB
(522 kHz-1611kHzfor9 kHZ step) Signal to Noise Ratio : Phono 77 dB
Usable Sensitivity : 250 uV/m, 50 11V (IHF short»circuited (New IHF 75 dB)
(External Antenna) A network) Tape Play 98 dB
Signal to Noise Ratio :50 dB (New IHF 75 dB)
Distortion : 0.5 % at 10 mV/m Power Consumption : See page 24
Selectivity :63 dB i10 kHz(60 dB :9 kHz, DIN)
(Note) * USA. & CANADA Design and specifications subject to change without not/Ce.

Dimensions and Weight

Dimensions Weight
Areas . -
Height Width Depth . Net 7
U.S.A., Canada & U.S. MiIitary Market 12.0 cm (4723/32") 48.0 cm (18729/32) 38.2 cm (15-1/16") 10.8 kg (23.8 lbs.)
All Other Countries 11.9 cm (4-11/16") 45.2 cm (17713/16") 38.2 cm (15-1/16) 10.6 kg (23.8 lbs.)

R-S77
No. 2520 , 1 ,