NAD C730 Service Manual

Cover page of NAD C730 Service Manual

Service Manual for NAD C730, downloadable as a PDF file.

We also have owner's manual to this model.

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  • The manual has 36 pages
  • File size: 2.76 MB
  • Available language versions: English
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NAD
SER
VICE
MANUAL
C 730
STEREO
RECEIVER
C
730
STEREO RECEIVER
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NAD
SER
VICE
MANUAL
C 730
STEREO
RECEIVER
C
730
STEREO RECEIVER
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2
SERVICE SAFETY PRECAUTIONS
1.
Replacing the fuses
CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY
WITH SAME TYPE OF FUSE.
Reference No
Part Number
Description
M151 *AH
5120-0037-0
FU T3.15A 250V UL/CSA 5X20MM
M152 *C
5100-2530-1B
T2.5A/250V IEC
M154 *AH
5120-0052-0
FUSE T1.6A 250V 5X20MM UL/CSA
NOTE:
<*AH > : USA, CANADIAN MODEL ONLY.
<*C > : EUROPEAN MODEL ONLY.
2.
Safety check out
(Only U.S.A. model)
Before returning the product to the customer, make leakage current or resistance measurements
to determine that exposed parts are acceptably insulated from the supply circuit.
Parts marked with the symbol
are critical with regard to the risk of fire and electric shock.
Replace only with parts recommended by the manufacturer.
CONTENTS
DESCRIPTION
PAGE
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4
REAR PANEL / FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
ADJUSTMENT POINTS DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
INSTRUMENT SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
ALIGNMENT PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
IMPORTANT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-14
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-19
IC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-23
ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-33
EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-36
PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
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3
SPECIFICATIONS
POWER AMPLIFIER SECTION
1.
Rated Distortion
(THD 20Hz-20KHz, 30W, 8 ohm)
0.08%
(THD 1KHz, 30W, 4 ohm)
0.1%
2.
Input Sensitivity (ref. 30W 8 ohm, 1KHz)
350+/-30mV
3.
S/N Ratio (A-wtd, 1K ohm, 500mV CD in, 1KHz)
-85dB
4.
Frequency Response (500mV CD in, 1W, 20Hz-20KHz)
0±0.8dB
5.
Channel Balance
Volume maximal output 30W (ref), 1KHz
1dB
1dB to -40dB, 1KHz
2dB
-41dB to -50dB, 1KHz
3dB
6.
Audio Muting at 1KHz
-52dB
7.
Headphone Output in 0.1% (600 ohm load, 500mV CD in, 1KHz)
10V
8.
Crosstalk (2V input, 10W, 1KHz)
-63dB
PRE - AMPLIFIER SECTION
1.
Rated Distortion (THD, 2V CD input, 4V output, 1KHz)
0.08%
2.
Frequency Response (500mV CD in, 20Hz-20KHz)
0±0.08dB
3.
S/N Ratio (A-wtd, 500mV CD in, 1KHz)
-85dB
4.
Tone Control Response
Bass (500mV in,1W out ,100Hz) boost / cut
9±2dB
Treble (500mV in,1W out ,10KHz) boost / cut
9±2dB
AM TUNER SECTION
Frequency Range:
AH
530 - 1710 KHz
Step
10 KHz
C
531 - 1602 KHz
Step
9 KHz
Input level is expressed as the reading in open-circuit
of 75-ohm source impedance signal generator.
1.
Usable Sensitivity (999/1000KHz)
30dBµV
2.
S/N Ratio (5mV input)
38dB
3.
THD (5mV input)
3%
4.
IF Rejection (450KHz)
36dB
5.
Image Rejection (F+2xIF)
28dB
6.
Selectivity
17dB
7.
Output
130mV±26mV
8.
Loop Sensitivity (20dB S/N)
999/1000KHz
66dB
603/600KHz
66dB
1404/1400KHz
66dB
9.
Frequency Response (100-2.3KHz, 5mV)
0±6dB
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4
FM TUNER SECTION
Frequency Range:
AH
87.5 - 108 MHz
Step
50 KHz
C
87.5 - 108 MHz
Step
50 KHz
Input level is expressed as the reading in open-circuit
of 75-ohm source impedance signal generator.
*C
*AH
1.
Usable Sensitivity (Mono, 98MHz)
15dBµ
15dBµ
2.
S/N Ratio (60dBµ, IHF wtd)
Mono
72dB
72dB
Stereo
66dB
66dB
3.
THD (60dBµ, L=R, 75KHz Dev. for AH, 40KHz Dev. for C)
Mono
0.3%
0.3%
Stereo
0.35%
0.35%
4.
IF Rejection (10.7MHz)
78dB
65dB
5.
Image Rejection (119.4MHz)
85dB
85dB
6.
Capture Ratio (40dBµ)
3dB
3dB
7.
AM Suppression (60dBµ, 100%mod FM, 30%mod AM)
48dB
48dB
8.
Pilot Suppression (60dBµ)
60dB
60dB
9.
Frequency Response
(60dBµ, 20Hz - 15KHz in, 75µS for AH, 50µS for C and
0±1.5dB
0±1.5dB
Japan)
10. Channel Separation (60dBµ, IHF wtd)
100Hz
30dB
30dB
1KHz
38dB
38dB
10KHz
30dB
30dB
11. Alternate Channel Selectivity (±400KHz, IHF)
60dB
45dB
12. Muting Level
18±3dBµ
18±3dBµ
13. Output
750mV±150mV 500mV±100mV
14. Blend on Separation (60dBµ IHF wtd)
6±2dB
6±2dB
15. RDS Decode Sensitivity
26dBµ
26dBµ
16. Auto-search Sensitivity
OFF
15dBµ
15dBµ
ON
24dBµ
24dBµ
PHYSICAL SPECIFICATIONS
Dimensions (Width x Height x Depth)
435 x 109 x 305 mm
Net weight
7.2 kg (15.87 lbs)
Shipping weight
9.2 kg (20.5 lbs)
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5
REAR PANEL / FRONT PANEL
REAR PANEL
FRONT PANEL
1. POWER ON / OFF
2. STAND-BY INDICATOR
3. BLEND
4. MEMORY
5. FM MUTE / MODE
6. AM / FM
7. DISPLAY
8. PRESET / TUNE
9. PRESET / TUNE
AND
10. DISPLAY AREA
11. VOLUME
12. HEADPHONE SOCKET
13. INPUT SELECTORS
14. BASS & TREBLE
15. TONE DEFEAT
16. BALANCE
1. FM ANTENNA
2. AM ANTENNA
3. DISC INPUT
4. CD INPUT
5. VIDEO INPUT
6. AUX INPUT
7. TAPE 2 IN, OUT
8. TAPE 1 IN, OUT
9. PRE OUT
10. NAD-LINK IN, OUT
11. SOFT CLIPPING
12. 12V TRIGGER OUT
13. SPEAKERS
14. AC LINE CORD
15. SWITCHED AC OUTLET (AH version only)

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