20054 crown INSTRUCTION MANUAL SERIAL NO. ISSUED TO ----- ------ D-60 DUAL-CHANNEL POWER AMPLIFIER CROWN INTERNATIONAL INC.
Section 1 DESCRIPTION 1.1 GENERAL FIG. 1 - 1 INTEGRATED CIRCUIT STEREO D-60 AMPLIFIER The D-60 is a dual-channel medium power ampli fier for u ltra-low distortion amplification from A total of 24 discrete transistors, l linear IC (dual op amp), 14 diodes and 1 bridge rectifier are uti lized in a CROWN-pioneered Class AB+B output circuit The effective number of semiconductors is 40 transistors and 24 d iodes 5Hz to 20KHz with operation into loads of 4 ohms and higher.
2 1.2 SPECIFICATIONS 1.2.1 STEREO SPECIFICATIONS 35 Output Power watts per channel m1mmum RMS (both channels or•er ating) into an 8 ohm load over a bandwidth of 20Hz-20KHz at a rated RMS sum total harmonic distortion of 0.05% of the fun· damental output voltage. Frequency Response ;:0. 1dB 20Hz-20KHz at 1 watt into 8 ohms; .±.1.2dB 5Hz-100KHz at 1 watt into 8 ohms. 1 KHz Power 40 watts RMS into 8 ohms, per channel, both channels operating, 0 . 1 % total harmonic distortion.
TABLE OF CONTENTS Section 1 1.1 1.2 1 .3 1.4 1.4.1 1.4.2 1.4.3 Section 2 2.1 2.2 2.3 2.4 2 .4 . 1 2.5 2.6 Section 3 3.1 3.2 3.3 3.4 3.5 Section 4 4.1 4.2 4.3 Section 5 PAGE DESCRIPTION General 1 Specifications . . ....... ...................................................................................... 2,3,4,5,6,7,8,9 Warranty ........................................................................................................................ ... 10 Accessories ............ ..............
3 1.2.2 MONAURAl SPECIFICATIONS Output Power 70 watts minimum RMS into a 16 ohm load over a bandwidth of 20Hz-20KHz at a rated RMS sum total harmonic distortion of 0.05% of the fundamental output voltage. Frequency Response .±0.2dB 20Hz-20KHz, 1 watt, 16 ohms . .±1dB 6Hz-50KHz, 1 watt, 16 ohms. 1KHz Power 80 watts RMS into 1 6 ohms. Harmonic Distortion Less than 0.001% from 20Hz-400Hz and increasing linearly to 0.05% at 20KHz at 70 watts into 1 6 ohms. I.M. Distortion Less than 0.05% from 0.
4 1.2.3 GEN ERAl SPECIFICATIONS 1 06d B below rated output. Hum and Noise (20Hz-20KHz) Phase Response +10, -15° 20Hz-20KHz at 1 watt. Input Impedance 25K ohms :<:30%. Amplifier Output Protection Short, mismatch, and open circuit proof. V-l limiting is instantaneous with no annoy ing thumps, cutout, etc. Overall Protection AC line fused. Controlled slewing rate voltage amplifiers protect overall amplifier against RF burnouts.
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6 .1 NOMINAL HARMONIC DISTORTION .01 DISCLOSURE PROHIBITED effective Nov. 4. 1974 .001 lK 100 10 lOK lOOK FREQUENCY (Hz) .1 .08 .06 NOMINAL INTERMODULATION DISTORTION .04 .02 I.M. 0 % .06 TEST INSTRUMENT RESIDUAl .04 0.001% . 02 (typ) DISCLOSURE PROHIBITED 0 effective Nov. 4. 1974 .06 .04 .02 .01 .
7 1 .1 .01 .004 1 10 100 lK lOK lOOK FREQUENCY (Hz) P.E. (per cent) 501-�:-4-+++4+��-+-+-++4�-+-+-+++���--+-��-+4��··��.+ 10 lK 100 lOK lOOK FREQUENCY (Hz) I! ll .::l± . H P �· I I I I • i �---=:'c::.L.-:: ' -·-- '\. ....
8 60 LZo . (DEGREES) i 40 100 10 lK lOK lK lOK lOOK FREQUENCY (Hz) DB below 30w 10 100 lOOK FREQUENCY (Hz) 400 i N �- i 1 I ·If I I 100 • nV/YHZ i i 10 cc -- I I ..... . . .. . .... - �··· . .. .
PARTS liST, D-60 Page 1 (Starts Sill 17526) Schematic Designation Description Crown Part# Other Information MAIN MODULE 41119 PC Board 7925 Capacitors ClQl, C201 25 M F 1 5V N P Vertical 3 1 86 C102, C202 C107, C207 Cll5, C2l5 200 PF M ica 34 1 1 C 1 03, C203 100 M F 16V Vertical 3729 C 1 06, C206 .
PARTS liST, D-60 Page 2 Schematic Designation Description Crown Part# Rll5, R215 Rll6, R216 4.7K ohm Y, watt 5% CF 1640 Rll7, R217 18K ohm ';.\ watt 5% CF 2633 Rll9, R2 1 9 Rl25, R225 180 o h m 1;.\ watt 5% C F 2873 Rl20, R220 Rl27, R227 5.6 ohm y, watt 5% 3299 Rl21, R221 Rl22, R222 120 ohm y, watt 5% Film 3837 Rl23, R223 100 ohms Y, watt 5% CF 1007 Rl26, R226 2.2K ohm Y, watt 5% Film 3 1 45 R 1 32, R232 750 ohm 1;.\ watt 5% 3803 *Rl35, R235 3.3K ohm ';.
PARTS liST, D-60 Page 3 Schematic Designation Description Crown Part II Other Information Integrated Circuits IC-1A, B uA739 or uA749 3231 3643 May be substituted for uA739 with proper load resistor Coil Ll01, L201 .
PARTS LIST, D-60 Page 4 Schematic Designation Description Crown Part# Other Information CAPACITOR BRACKET ASSY. C23, C24 DM1 R34 10,000 M F 40V 4250 Solder lug 2934 10-32 x Y2 T H P screw 2049 #6 flat washer 2101 # 1 0 i nternal star washer 2279 'A" fiber shoulder washer 1648 VH148, 6A bridge 3062 #6 solder lug 3 1 63 6-32 hex nut 1889 6-32 x % B H P screw 2134 1 o h m y, watt 5% CF 3612 Mounted on common term inal for C23, C24 to lug at OM l.
PARTS LIST, D-60 Page 5 Schematic Designation Description Crown Part# Other Information 3" foam tape 1 1 52 Mounts T l to front panel 6-32 captive nut 2019 Mount on bottom back edge of FP channel Anodized T0-3 insulator 4039 Mounts outputs T0-3 insulator 4071 Mounts outputs 6-32 x y, B H P screw 2176 Mounts outputs #6 internal star washer 1823 Mounts outputs #6 solder lug 3 163 Mounts outputs 6-32 hex nut 1889 Mounts outputs Feed-through terminals 3502 C6 .
PARTS LIST, D-60 Page 6 Schematic Designation Ll02, L202 Description Crown Part# Other Information 8-32 x 'I< FHP screw 2136 Mounts bottom cover 8-32 x Ys FHP screw 2274 Mounts bottom cover 6-32 x 'I< FHP screw 2436 Mounts bottom cover Self-stick rubber feet 3342 I nstalled on bottom cover D-60 top cover 9614 6-32 x % BHP screw 2134 Holds front of top cover #8-18 x Ys #6 SMT screw 3958 Holds back of top cover OUTPUT I NDUCTOR ASSV.
9 16 14 NOMINAL LIMITS OF 12 V-1 OUTPUT 10 8 6 4 2 DISCLOSURE PROHIBITED 0 effective Nov. 4. 1974 ·2 -4 ·6 -8 ·10 -12 . -14 .
10 1 . 3 WARRANTY 1.4.2 VFX-2A CROWN guarantees this equipment to perform as specified. CROWN also warrants the components and workmanship of this equipment to be free from defects for a period of 3 years from date of purchase. The CROWN VFX-2A is a dual-channel variable elec tronic filter-crossover. When used with a power a mplifier it can greatly add to the total system capa bil ity. In combination with the D-60, theVFX-2Aadds several convenient useful function s .
Section 2 INSTAllATION Sufficient ventilation must be provided for the unit. This means that air must be allowed to circulate over the chassis to prevent overheating. Applications other than "Hi-Fi" - requiring long, sustained sig nals at high power-levels may require the use of a cooling fan. When rack mounting, it is a good prac tice to allow a l%" space above and beiow the unit. (See figure 2-2 for mounting dimensions.) 2.
POWER AMPLIFIER PROTECTION SYSTEMS PROTECT AMPLIFIERS, BUT NOT SPEAKERS! TI'UT MAIN 2 t 2 � •.., r--- RIGHT ®ro® POWfR AMP 3 to 2 wire adapter Switched Outlet Tie TAP! 1 @ ® � 'Ill ro IS> RECORDER INPIIT _...-:;- Shielded Audio Cables RCA Pin-to-W' Phone MONO-STEREO SWITCH Power Cable MDP (Dual Banana) Plugs Note! IN-LINE FUSES FIG.
13 2.3 NORMAl HI-FI INSTAllATION 1. Two-conductor speaker cables must connect to the OUTPUT dual binding posts using terminal lugs, tinned ends, or "banana" plugs. 2. Since the 0-60 is a "basic amplifier," the main outputs of the control-center or "preamplifier" must be connected via shielded audio-cables to the two jacks marked INPUT. Use RCA-pin at preamp and standard 14 in. phone-plug at the 0-60. The two cables should be tied parallel a long their entire length using the accessory cable ties. 3.
14 .... 40 R, LOAD R, Rs 30 06 . SOURCE (ohmsl 2 • 100 •• •• " 20 " ,<' .� � .... .{\> • • .. .. !0 •• ,. .�· ....� ... ,, .,o � ""..-.;. CADLE ..�•If• ,.-# ... 5 • (AWG) -#21 100 -#26 50 #24 -#22 ••• 10 -#1& -$16 s 5 WIRE 500 20 2 -#14 -·12 -#10 .,., , ,.� • 2·COND. 10 • COPPER 1000 (f-tl 20 10 ANNEALED tn/1000 ft.) .1 FACTOR (ohmJ) lis RESISTANCE DAMPING RESISTANCE 8000 2000 2 • -#8 -#6 $000 •• • 6 -#4 -#2 7 - #0 -#00 10 .
15 2. Connect output lines as per the following draw ing, Figure 2-7. The output from the D-60 in Mono is BAlANCED and is isolated from the chassis, and from the input grounds to the D-60. CAUTION: Be certain that a l l equipment (meters, switches, etc.) connected to the Mono output lines is balanced. Both sides of the line must be totally isolated from the input grounds, to the D60. if this is not observed, severe oscillation may result.
16 pair o f input cables whose area i s subjected to a magnetic hum field. In practice, both cables should lie together along their length, and away from the power transformer. Tying the input and output grounds together may also form a ground loop. A third precaution (with input and output grounds together, as in testing or metering) is feedback oscillation, from load current flowing in the loop. In industrial use, even the AC power line may pro vide this feedback path.
Section 3 OPERAliNG INSTRUCTIONS 3.1 CONTROLS AND ADJUSTMENTS FIG. 3- T OPERATING CONTROL S load i s a loudspeaker, amplifier protection will be evidenced by distortion in the speaker. The audible effect ranges from something resembling cross overnotch distortion to a snapping sound, depend ing on the over-all load characteristics. Speaker systems which are truly 4 ohms o r greater will not initiate the protection system.
18 16 14 NOMINAl liMITS OF 12 V-1 OUTPUT 10 8 6 4 2 DISCLOSURE PROHIBITED 0 effective Nov.
19 3.3 OPERATING PRECAUTIONS 10. The following are a number of operating precau· tions given as a n aid to understanding proper and improper amplifier usage: Tampering in the circuit by unqualified per sonnel or the making of u n authorized circuit modifications invalidates the warranty. 11. Do not expose the output leads to areas likely to be struck by lightning. Such an installa tion could invalidate the a m p lifier. 1. 2. 3. 4. 5. 6. 7.
20 Another form of load protector is shown schemat ically in Fig. 3-4. W h e n ev e r the load ... lN-4004 1.2:K is over driven, a relay switches a lamp i n series with the load; smoothly relieving the overload. The l a m p then doubles as an overdrive ind icator as it glows. If overd rive is unreasonably severe, the l a m p will serve as a fuse. By adjusting the relay tension ad P..
Section 4 CIRCUITRY 4.1 PRINCIPLES OF OPERATION The 0-60 has two direct-coupled amplifier cir cuits which employ a dual IC op amp and silicon transistors in a l l stages. The CROWN designed and developed circuit represents a level of qual ity and performance presently unequaled in the field of audio amplifier design. The dual IC op amp is of a low noise type having a large gain bandwidth.
22 4. When measuring hum and noise, all inputs should be disconnected from the amplifier and the level controls set to minimum or to maximum, preferably minimum. 5. Whenever possible avoid ground loops in the test equipment caused by connecting the out put ground to the input ground. Never con nect the ground of the cable going to the load back to the input ground. Ground loops are especially obnoxious when measuring distortion.
Section 5 APPUCATION NOTES The maximum voltage and a mperage excursions in all directions about zero (center of scope screen) define the volt-ampere operating range of the load. If a load is known to be linear over its operating range it is not necessary to supply the maximum desired power to the load. The test may be con ducted at low signal l e v e l s and the c u r re n t sensing resistor (indicated as 0 . 1 ..--.) may be en larged to a convenient value for the oscilloscope's deflection sensitivity.
25 APPIJCATION NOTE NO. 2 WARNING POWER AMPLIFIER PROTECTION SYSTEMS PRO TECT AMPLIFIERS BUT NOT SPEAKERS! YOU, AND/OR YOUR SPEAKER MANUFACTURER ARE RESPONSIBLE FOR SPEAKER PROTECTION! Except in unusual sets of circumstances, the cir cuitry included in power amplifiers designated as "protection", whether made up oftransistor limiters, circuit breakers, fuses, SCR's, or whatever, is design ed primarily to protect the amplifier from damage and will only protect speakers incidentally.
NOTES: -THIS CIRCUIT STARTS SN 1 2 75 1 , AND AP PLIES TO SCHEMATIC MI-247C, MI-247D. -C7 ADDED SN1 6,776. 01 1 5 , 02 1 5 ADDED SN 17526. --SCHEMATIC DESIGNATIONS PRECEDED BY 1 A R E LEFT CHANNEL; BY 2 , RIGHT CHANNEL.
ORG 1 -u SW1 POWER f1 "' F2 2A ' AC .50-.WO HZ - WHT - JUMPER GRN ��, ; '- rh L/ BlU-WHT c BlK r--.. BLK-WHT E 31 " T' WHT ?-r-RED/YEL >- ' ' ' �ED- GRN I - '" >' ' ' DM-1 :� ! - o.u -- - - -1 - - - - - - REO-BlK D 1 I >- ' >-REDIYEL ---- BLU >- BLK �ED 'GRN RED _ _ _ _ _ I =i= + =F= + >30 C23 10,000 40V GND C24 10,000 40V R34 1 POWER SUPPLY WIRED FOR 120 VAC. FOR OPERATION AT AN OTHER LINE VOLTAGE, FOLLOW CONVERSION TABLE BELOW. r.
