Service Manuals, User Guides, Schematic Diagrams or docs for : NAD Цифры 300 300
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CONTENTS PAGE
1. SPECIFICATIONS 3- 6
2. DISASSEMB LY I NSTRUCTI ONS 7
3. DIAL STRINGING DETAIL 7
4. ALIGNMENT AND CHECK POINTS I
5. ALIGNMENTPROCEDURES ....9- 12
6. CHANGING POWER LINE VOLTAGES 13
7. TROUBLESHOOTI NG 18
8. TUNER FRONT-END 19
9. OO36TUNERBOARD ...2O
10. 5027 PRE-AMPLIFIER BOARD ..,.. 21
11. 6038 MAIN AMPLIFIER BOARD 22
12. 7105 SWITCH BOARD 23
13. 7110 DOLBY NR BOARD 24
14. 7118 DOLBY FM CALIBRATION BOARD 25
15. BO25 POWER SUPPLY BOARD ...... 25
16. 9025 TONE AMPLIFIEB BOARD .... 26
17. ELECTRICAL PARTS LIST 27 - 36
18. M ISCE LLAN EOUS PARTS LIST 37
19. BLOCK DIAGRAM 38
20. INTERNAL VIEW OF INTEGRATED CIRCUIT 39
21. SCHEMATIC DIAGRAM SEPARATE SHEET
2
1. SPECIFICATIONS
NOMINAL LIMIT UN IT
A. FM SECTION
1. FM Tuning Range *87.7-108 MHz
*Adjustment for tuning prohibited below 87.5 MHz
in West Germany
2. Dial Calibration Accuracy 90 & 106 MHz r 150 t 200 kHz
98 MHz t'100 x2OO kHz
IHF Sensitivity at 90, 98 & 106 MHz
Noise and Distortion: -30 dB 1.8 2.8 pV
4. lmage Rejection at 98 MHz 83 73 dB
5. lF Rejection at 90 MHz 90 75 dB
6. AM Rejection at 98 MHz
at 30% AM & 100% FM Simultaneous Modulation,
100 - 20,000 pV Antenna lnput dB
7. Limiter Sensitivity
pV
at- 1 dB Below Maximum Audio 1.6
Total Harmonic Distortion at 98 MHz TAPE OUT
o/
(at 400 Hz lOOo/o Modulation, 1,000 pV lnput) o.25 0.6 /o
9. Spurious Response at 98 MHz
Antenna lnput: 3 pV
OSC 2nd 206.7 MHz 80 dB
1/2lF 103.35 MHz 80 dB
10. lF Bandwidth,6 dB down Antennalnput: 100pV 250 200 kHz
1 1 . lF Bandwidth, 50 dB down Antenna lnput: 100 pV 600 800 kHz
12. Signal-to-Noise Ratio 100% Mod., 1 mV lnput 70 65 dB
13. Capture Ratio 1,000 prV, MONO lnput 1.2 2 dB
14. Output Voltage
Stereo and Mono, 4OO H2,100% Mod. TAPE-2 OUT 1.0 0.8
15. Alternate Channel Selectivity (lH F)
Antenna lnput: 100 pV 75 60 dB
16. Muting Threshold 10 B-20 pV
B. FM MPX SECTION
1. Stereo Separation at 98 MHz
(Antenna lnput: 1,000 pV) 100 Hz 35 30 dB
1 kHz 40 33 dB
10 kHz 28 22 dB
Hl-BLEND on, at 1 kHz 13 1 313 dB
2. Total Harmonic Distortion
at 98 MHz Stereo, 1 mV Antenna lnput 1 kHz and/or
o/
500 Hz 100% Mod., at REC OUT o.4 1.2 /o
3. Automatic Stereo Threshold 10 5-16 sV
4. Residual 19 kHz & 38 kHz at 98 MHz, 1 mV lnput 50 45 dB
5. Stereo Frequency Response 40 - 10,000 Hz t1 dB
o/
6. 19 kHz Pilot Signal Dev. to Activate 7 /o
NOMINAL LIMIT
C. AM SECTION
1. AM Tuning Range 525-1,650 535-1,605
2. Sensitivity (lHF)
at 600, '1,000, 1,4OO kHz, 400 H2,30% Mod. 200 400
3. Bandwidth 6 dB down
at 1,000 kHz with Antenna lnput of 500 pVlm 6 4-10
4. lmage Rejection at 1,400 kHz 80 60
5. lF Rejection at 600 kHz 40 32
6. AGC Figure of Merit Form 0.2 V/m, at 1,000 kHz 50 45
7. Total Harmonic Distortion
at 1,000 kHz 5,000 pYlm Antenna lnPut,
4OO H2,30% Mod., at REC OUT
8. Dial Calibration Accuracy 600 kHz
1,000 kHz
1,400 kHz
9. Output Voltage
1 kHz 30% Mod. 5 mV/m lnput at TAPE 2 OUT
10. Signal-to-'Noise Ratio
400 Hz 30% Mod. 50 mV/m lnPut
D. AUDIO SECTION
1. Output Power
0.3% THD, 2O Hz - 20 kHz, B ohms Load,
Both Channels Driven W/Channel
2. Harmonic Distortion
o/
/o
at 1 kHz,8 ohms Load, 65Watts OutPut
3. lntermodulation Distortion o/
at2Y Output,4 ohms Load 0.15 /o
4. Frequency Response
AUX 1 W Output, 8 ohms Load +0.5 dB
20 Hz - 2O kH,z dB
-2.O
5. lnput Sensitivity
at 1 kHz, for 25.3 Volt Output, B ohms Load
PHONO 310.5
AUX 200130
Mrc 2.2tO.5
TAPE IN 200t30
6. Tape Recording OutPut Level
Front Panel Phono Jack/Rear Panel DIN Jack
at PHONO lnput: i mV 200t30/30t5
7. Phono lnput Equalization
50 - 15,000 Hz t1.2
4
NOMINAL LIMIT UNIT
8. Harmonic Distortion of EO Amplifier Section
at 1 kHz, 50 mV lnput 0.035 0.08
9. Overload Capability of EO Amplifier Section
at 1 kHz, 0.1% HD 240 200 mV
10. Tone Control
BASS at 100 Hz t10 t1Ot2 dB
TREBLE at 10 kHz t10 !1O!2 dB
11. Gain Difference of Left and Right Channels
at AUX and PHONO 1.5 dB
12. High-Filter at7 kHz -5 t2 dB
13. Subsonic Filter at 40 Hz -3 t2 dB
14. Channel Separation on AUX lnput.
Opposite Channel : Shorted
i00 Hz 70 50 dB
1 kHz 80 60 dB
10 kHz 70 50 dB
15. Signal-to-Noise Ratio (lnput Shorted)
PHONO 63 58 dB
AUX 85 75 dB
TAPE IN 85 75 dB
Volume Minimum 90 85 dB
16. LOUDNESS Compensation (-30 dB)
100 Hz +8 +8t2 dB
10 kHz +5 +5t2 dB
17. Harmonic Distortion of Pre-Amplifier Section
20 Hz - 20 k{z,2 Volt Output 50 Kohms Load o.o2 0.1 o/
/o
18. lnput Sensitivity of Pre-Amplifier Section
at 1 kHz, for 25.3 Volts Output, 8 ohms Load 1 1!O.2 V
E. DOLBY NR SECTION
.
1 Output vs lnput at R EC Position
at2k1z,0 dB=30 mV
lnput Level 0 dB 0 t2 dB
-20 dB -15.7 -15.7t2 dB
-21.5 -21.5t2 dB
_;3 3B -31.1 -31.1t2 dB
2. Output vs lnput at PLAY Position
at 5 kHz, 0 dB=30 mV
lnput Level 0 dB 0 t2 dB
-20 dB -26.7 -26.7!2 dB
-30 dB -40.3 -40.3x2 dB
3. Frequency Response of DOLBY FM
lnput=3O mV 5 kHz +3 +31 1 dB
10 kHz +5 +5r 1 dB
NOMINAL LIMIT
F. GENERAL
1. Power Requirements
22OVAC,50 Hz (12O,24O VAC,50 Hz)
2. Dimensions
508(W) x 400(D) x 145(H) mm
3. Weisht 22 Ks.
2. DISASSEMBLY INSTRUCTIONS
1) Removing the metal enclosure from chassis. (Refer to Figure A)
Remove seven screws from top of the enclosure and four screws from both sides of the en-
closure, then pull off the enclosure f rom the chassis.
2l Removing the Front Panel. (Refer to Figure A)
a) Pull off all the control knobs except for PLAY CAL and REC LEVEL.
b) Remove three nuts from SELECTOR, SPEAKERS and DOLBY NR controls.
c) Remove three screws from top of the Front Panel and remove Front Panel.
Note: Numbers shown in circles correspond to Miscellaneous
Parts List on Page 37.
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Figure A
3. DIAL STRINGING DETAIL
Note: Tuning capacitor should be fully closed position
DIAL DRUM
(2 TURNS)
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13. 7110 DOLBY NR BOARD
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14. 7118 DOLBY FM CALIBRATION BOARD
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