Akai QX-D3305, Руководство по обслуживанию

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Power Supply : AC 230V 50Hz
Output Load : 4 ohm non-reactive
Reference Output : 500 mW, 4 ohm
Input Signal Source : External AM Loop Antenna
75 ohm Dummy for FM
Modulation : 30% 400Hz for AM 80% for Power
75kHz Deviation 1000Hz for FM
1kHz, 750mV @ Aux Input
Remarks : 7.5kHz Pilot Tone
40kHz L+R 1000Hz
GENERAL TEST CONDITION
CD SECTION
UNIT NOMINAL LIMIT
1. 10% Dis. Output Power (1kHz, 0dB) W 5 4.5
2. Frequency Response (100Hz-20kHz/1kHz, 0dB) dB ±1 ±6
3. De-emphasis Response (1kHz, 0dB/5K, -5dB/16kHz, -9dB) dB ±2 ±4
4. Channel Balance (1kHz, 0dB) dB 1 2
*5. Channel Separation (1kHz, 0dB) dB 45 40
*6. T.H.D. + Noise (1kHz, 0dB) % 0.3 1.0
*7. S/N Ratio (1HF-A) (1kHz, 0dB) dB 60 55
8. CD Speed (1000Hz) Hz - ±1
*9. Dynamic Range dB 80 70
10. Wedge µm - 600
11. Black Dot µm 800 600
12. Fringer Print Track - No. 18
13. Eccentricity TCD-712 ABEX µm - 150
14. Vertical Deviation TCD-731R ABEX mm - >0.8
15. Seaching Time TN01-TN024 Sec. 5 8
TN024-TN01 Sec. 5 8
16. Minimum Operation Voltage % 85 90
17. CD Max. Vol. Hum mV 5 10
*with external "A" CURE L.P.F.
ITEM 1 - 9 Test Disc "CBD SONY YEDS7"
ITEM 10 - 12 Test Disc "PHILIPS 444A"
ITEM 15 Test Disc "PHILIPS 444"
Level Matching
Aux 750 mV
AM 55% 5mV dB ±3
FM 40kHz 1mV dB ±3
CD -10dB dB -6 ±3
MTT-112N dB ±3
TEST ITEMS
AM SECTION, AMPLITUDE MODULATION
UNIT NOMINAL LIMIT
1. Tuning Range kHz 522-1620 -
2. I. F. kHz 450 ±3
3. S/N 10mV/m 0.999MHz dB 36 30
4. Sens. (at S/N 20dB) 0.603MHz µV/m 997 1995
0.999MHz µV/m 997 1995
1.404MHz µV/m 997 1995
5. I. F. Rejection 0.603MHz dB 50 46
6. Image Rejection 1.404MHz dB 30 24
7. Spurious Rejection dB 35 25
8. Bandwidth, -6 dB, at 0.999MHz kHz 6 4 - 9
(Max. Sens. +6 dB)
9. ACA (±9 kHz) Input 0.999MHz dB 20 15
10. AGC Figure Merit 100mV/m dB 45 40
11. Distortion, 5mV/m, 30% % 1 3
80% % 3 6
12. 10% THD Power AC W 5 4.5
13. a. Tweet (2nd 900kHz & 3rd 1350kHz) dB 15 10
at 75 dB I/P
14. Audio Fidelity, Centre ± (6) dB Hz 60/2200 120/2000
15. Low Voltage AC % 80 85
16. a. Mod. Hum 10mV/m dB 36 30
b. Hum at Min. Vol. mV 1 3
17. Auto Stop Sens. dB 64 70
18. Step Frequency kHz - 9
TEST ITEMS
CASSETTE SECTION
UNIT NOMINAL LIMIT
A (PLAYBACK)
1. Tape Speed (MTT-111N)
% ±1 ±3
2. Wow & Flutter JIS WTD (MTT-111N) % 0.25 0.38
3. Take Up Torque (PLAY) g-cm 30 60
4. F. F. / Rew. Torque g-cm 60 140
5. Output Power (MTT-112BN) 10% THD W 5 4.5
6. S/N Ratio (MTT-112BN) dB 45 40
7. T. H. Distortion (MTT-112BN) % 2 3
8. Frequency Response (MTT-257H) 125Hz dB ±3 ±6
6.3kHz dB ±3 ±6
9. Separation (MTT-141N) w/BPF dB 40 30
10. Cross Talk (X- BASS OFF) w/BPF (MTT-121N) dB 55 45
11. Hum & Noise VR MAX (w/o Tape) mV 30 50
VR MIN (w/o Tape) mV 1 3
B (RECORD)
1. T. H. / Distortion
% 4 8
2. Erase Ratio Effect (MTT-112BN) for Level dB 55 48
3. Rec. / Playback Level Difference (Radio) dB 2 4
4. Rec. / Play S/N Ratio (with A Filter) dB 40 35
5. Frequency Response (MTT-257) 125Hz dB ±4 ±7
(Ref: 1kHz 0dB) 6.3kHz dB ±4 ±7
Remarks:
All measurement should be done in Bypass mode without X-Bass/Tone…effect.
TEST ITEMS
1 2
PERFORMANCE SPECIFICATIONS
PERFORMANCE SPECIFICATIONS - CONTINUED