Ecler PAM 2000 Service Manual
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Ecler PAM 2000 Service Manual

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PAM2600/2000
SERVICE MANUAL

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  • Page 1 All manuals and user guides at all-guides.com PAM2600/2000 SERVICE MANUAL...
  • Page 2 All manuals and user guides at all-guides.com SERVICE MANUAL PAM2600/2000 INDEX - BLOCK DIAGRAM - FUNCTIONING DESCRIPTION - SCHEMATICS - COMPONENTS LOCATION SCHEMA - TESTING AND QUALITY CONTROL - TECHNICAL CHARACTERISTICS - WIRING DIAGRAM - CONFIGURATION DIAGRAM - MECHANICAL DIAGRAM - PACKING DIAGRAM...
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  • Page 4 All manuals and user guides at all-guides.com MODULE CIRCUIT 11.0504B OPERATION - DESCRIPTION The control element is the operational NE5534. This is a very low noise operational, especially designed for very high quality applications in professional audio equipment, control equipment and telephony channel amplifiers.
  • Page 5 All manuals and user guides at all-guides.com BIAS CURRENT ADJUST The bias current adjust is performed through the variable resistor connected between the emitters of the current sources R110 (5K Ω ). It delivers a supplementary current (it does not go through the operational) which simultaneously increases the voltage which falls in the Rc load resistors.
  • Page 6 All manuals and user guides at all-guides.com SYMMETRY ADJUST The threshold voltage varies much, even between MOSFETs of the same kind. When connecting them in parallel we must be careful that they all have the same conduction current if we want equal currents circulating in all of them.
  • Page 7 All manuals and user guides at all-guides.com This resistance performs a negative feedback on the gate, lowering down the Vgs, relating to the drain current; like this: Vgs = Vgg - Id*Rs The higher the Id, the lower the Vgs voltage. The gate is protected by a zener, preventing a possible overload during an unexpected change from overload to real clipping.
  • Page 8 All manuals and user guides at all-guides.com Q123, together with the resistances which make the base divider, configure the current detector (this divider takes its voltage from one of the source resistances of a N MOSFET, which is proportional to the current circulating through itself).
  • Page 9 All manuals and user guides at all-guides.com...
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  • Page 11 All manuals and user guides at all-guides.com ZOBEL NETWORK This circuit tries to get a constant load impedance for the power module, in spite of the amplifier's load and frequency, to avoid phase shifting of the feedback signal. The values have been experimentally calculated through a study with square signal by trying to minimize the power amplifier's ringing with very capacitive loads (2,2µF//4 Ω...
  • Page 12 All manuals and user guides at all-guides.com PROTECTION CIRCUIT 11.0411 OPERATION - DESCRIPTION The circuit is configured by: - A POWER SUPPLY. - A THERMAL PROBE DC AMPLIFIER. - A TEMPERATURE DETECTOR. - A DC OUT DETECTOR PER CHANNEL. - A CLIP CIRCUIT PER CHANNEL. - A RESET (TURN OFF/TURN ON) CIRCUIT.
  • Page 13 All manuals and user guides at all-guides.com...
  • Page 14 All manuals and user guides at all-guides.com TEMPERATURE DETECTOR This circuit is calculated to operate over the output relay opening it if any of both modules' temperature excedes 90 E C, approximately. It is made with a comparator per channel (L-R), resident in the same IC306. Both share a reference voltage provided by D306 (TL431A), which gives excellent stability at that voltage "...
  • Page 15 All manuals and user guides at all-guides.com DC OUT CIRCUIT The circuit shown in the figure corresponds to the DC OUT of channel L. The goal of this circuit is protecting the loudspeakers when, because of a module fail, there is some DC appearing at the output. The voltages indicated in the figure correspond to rest state and they are given by the dividers made of R320-R322 and R332-R323.
  • Page 16 All manuals and user guides at all-guides.com CLIP CIRCUIT The other half of IC307(4001) is used in the clip circuit. Given that we have two gates more and we just need one for our purposes we will connect them in parallel for a higher output current and a more effective LED lighting up.
  • Page 17 All manuals and user guides at all-guides.com GENERAL RESET CIRCUIT (TURN OFF/TURN ON) TURN OFF RESET. This circuit starts working when the AC current from the transformer secondary disappears or, what is the same, when we turn the power amplifier off by pushing the power off switch, actually disconnecting it from mains.
  • Page 18 All manuals and user guides at all-guides.com BINARY COUNTER HEF4520 This is a 4-bit double binary counter. Configured in a way in which when there is the binary code equivalent to decimal number 5 at its output -so this is 1 0 0- it is blocked in this position, until it receives a new MR reset pulse.
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  • Page 20 All manuals and user guides at all-guides.com STANDBY MONOSTABLE The only thing left is the function of the monostable made of IC310 (4538). Like the counter and the monostable IC311 (4538), this circuit is connected to the PROTECT SIGNAL, too. Its output is "1" in rest state and becomes "0" during an approximate time of 1.3 seconds, which is given by the constant RC of the circuit R341 C316.
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  • Page 29 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : A DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE C101 47µ/100 C102 C100n C103 10µ/50 C104 10µ/50 C105 C15p C106 C100n C107 C100n C108...
  • Page 30 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : A DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE IC103 4N35 IC104 4N32 IC105 LM35D J101 FASTON 6.3mm J102 FASTON 6.3mm J103 FASTON 6.3mm J104...
  • Page 31 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : A DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE 10 Ω /.5 R121 1 Ω /.5 R122 1 Ω /.5 R123 W.22 Ω...
  • Page 32 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : A DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE R179 R180 R181 R182 MF3k65 PC 11.0504B PRINTED CIRCUIT WIRE BLACK 90mm whit TER.
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  • Page 37 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE C101 47µ/100 C102 C100n C103 10µ/50 C104 10µ/50 C105 C15p C106 C100n C107 C100n C108 C100n...
  • Page 38 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE IC103 TIL112 IC104 4N32 IC105 LM35D J101 FASTON 6.3mm J102 FASTON 6.3mm J103 FASTON 6.3mm J104 B3P-VH...
  • Page 39 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE 10 Ω /.5 R121 1 Ω /.5 R122 1 Ω /.5 R123 W.22 Ω /5 R124 W.22 Ω...
  • Page 40 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2600 DRW.Nº 33.0130PL REV : DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE R179 R180 R181 R182 MF3k65 PC 11.0504B PRINTED CIRCUIT WIRE BLACK 90mm whit TER.
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  • Page 43 All manuals and user guides at all-guides.com PARTS LIST: INPUT CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0127PL REV: DATE: 050995 SHEET 1 OF REPLACES: REPLACED BY: REFERENCE VALUE J501 B4P-VH J502 YKF52-5003 J503 YKF52-5005 PC 11.0538 PRINTED CIRCUIT...
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  • Page 46 All manuals and user guides at all-guides.com PARTS LIST: POTENTIOMETERS CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0128PL REV: DATE: 150295 SHEET 1 OF REPLACES: REPLACED BY: REFERENCE VALUE C201 220p C202 220p C203 C15p C204 C8p2 C205 10µ/35 C206 220p C207 220p C208...
  • Page 47 All manuals and user guides at all-guides.com PARTS LIST: POTENTIOMETERS CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0128PL REV: DATE: 150295 SHEET 2 OF REPLACES: REPLACED BY: REFERENCE VALUE R215 56Ω R216 W1k2/4 R217 W1k2/4 R218 MF1k00 R219 MF23k7 R220 MF23k7 R221 MF1k00 R222...
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  • Page 50 All manuals and user guides at all-guides.com PARTS LIST: LED CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0125PL REV: DATE: 180595 SHEET 1 OF REPLACES: REPLACED BY: REFERENCE VALUE D701 D702 D703 1N4148 D704 1N4148 D705 YELLOW D706 D707 1N4148 D708 D709 1N4148 D710...
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  • Page 53 All manuals and user guides at all-guides.com PARTS LIST: SOFT START AND POWER CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0126PL REV: DATE: 050995 SHEET 1 OF REPLACES: REPLACED BY: REFERENCE VALUE C801 2µ2/63 C802 2µ2/63 C803 47µ/100 C804 47µ/100 C805 10n 400V C806 2µ2/63...
  • Page 54 All manuals and user guides at all-guides.com PARTS LIST: SOFT START AND POWER CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0126PL REV: DATE: 050995 SHEET 2 OF REPLACES: REPLACED BY: REFERENCE VALUE R812 W39Ω/8 R813 W39Ω/8 R814 W39Ω/8 WIRE8 BLUE/430mm WIRE9 BROWN/430mm WIRE9 BROWN/430mm...
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  • Page 63 All manuals and user guides at all-guides.com PARTS LIST: PROTECTIONS CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0123PL REV: DATE: 070795 SHEET 1 OF REPLACES: REPLACED BY: REFERENCE VALUE FAST.2.8 FAST.2.8 C301 2200µ/35 C302 10µ/50 C303 10µ/50 C304 100n C305 10µ/50 C306 10µ/50 C307...
  • Page 64 All manuals and user guides at all-guides.com PARTS LIST: PROTECTIONS CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0123PL REV: DATE: 070795 SHEET 2 OF REPLACES: REPLACED BY: REFERENCE VALUE FAST.2.8 FAST.2.8 IC301 7805 IC302 7805 IC305 LM358D IC306 LM358D IC307 HEF4001B IC308 HEF4011B IC309...
  • Page 65 All manuals and user guides at all-guides.com PARTS LIST: PROTECTIONS CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0123PL REV: DATE: 070795 SHEET 3 OF REPLACES: REPLACED BY: REFERENCE VALUE R306 7K50 R307 90K9 R308 R309 R310 R311 R312 1k27 R313 604Ω R314 R315 R316...
  • Page 66 All manuals and user guides at all-guides.com PARTS LIST: PROTECTIONS CIRCUIT MODEL : PAM2600/2000 DRW. No 33.0123PL REV: DATE: 070795 SHEET 4 OF REPLACES: REPLACED BY: REFERENCE VALUE R362 100k R363 100k R364 100k R365 R366 0Ω 0Ω SCREW M3X8 DIN7985 NINE SCREW M3X8 DIN7985 NINE WASHER...
  • Page 67 All manuals and user guides at all-guides.com PROFESSIONAL PAM SERIES - TESTING RULES PRELIMINARY GROUND LINK Testing. - Verify that when the switch is at the ON position there is continuity between the chassis ground and the speakers ground terminal and that the opposite happens at the OFF position. Leave it at ON. - Put the power amplifier in stereo mode.
  • Page 68 All manuals and user guides at all-guides.com FREQUENCY RESPONSE 0.5V input signal. Verify frequency response at 20Hz/2kHz/20kHz. We must get the same signal output for the actual load at any of the frequencies.Set the frequency at 50kHz; the output level should not decrease more than 1 or 2 dB and there should not be any noticeable distortion.
  • Page 69 All manuals and user guides at all-guides.com PROFESSIONAL PAM SERIES - QUALITY CONTROL We will use a mixer with balanced output -if possible- and a nominal output level of 1V as the signal source for test purposes. Connect the mixer outputs to the power amplifier inputs. Plug the power amplifier to mains (make sure its specified voltage matches that of mains) and make sure that PROTECT, ON and SIGNAL PRESENT LEDs all light up when you turn on the amplifier by pushing the ON button.
  • Page 70 All manuals and user guides at all-guides.com TECHNICAL CHARACTERISTICS PAM2600 PAM2000 Frequency response at max. power output. 7Hz to 60kHz +0 -1dB Harmonic distortion+noise from 20Hz to 20kHz meas.band <0,02% <0,02% Intermodulation distortion (SMPTE) using frequencies of 50Hz and 7kHz at 4:1 ratio, nominal power.
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  • Page 78 All manuals and user guides at all-guides.com PARTS LIST: MECHANICAL DIAGRAM MODEL : PAM2600/2000 DRW. No 30.0042PL REV: DATE: 060795 SHEET 1 OF REPLACES: REPLACED BY: QUANTITY VALUE 18 SCREW M4x6 SPANLO DIN7985 6 SCREW M4x20 ALLEN DIN912 8 SCREW M4x12 SPANLO DIN965 16 SCREW M3x9 SPANLO DIN7985 8 METAL WASHER 3.2x6x1 4 INSULANT R19...
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  • Page 80 All manuals and user guides at all-guides.com PARTS LIST: ASSEMBLY FILTER CAPACITOR MODEL : PAM2600/2000 DRW. No 30.0043PL REV: DATE: 130796 SHEET 1 OF REPLACES: REPLACED BY: QUANTITY VALUE 1 CHASSIS WD.00.2063 8 WRAP-IT-TIES T-50-L 2 GROUND WD.00.2098 4 SCREW M5x10 DIN933E 4 METAL WASHER M5 ADE 1 GROUND WIRE7 4 CAPACITORS 22000µ/100V (PAM2600)
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  • Page 82 All manuals and user guides at all-guides.com PARTS LIST: ASSEMBLY RECTIFIERS AND SOFT START CIRCUIT MODEL : PAM2600/2000 DRW. No 30.0044PL REV: DATE: 140795 SHEET 1 OF REPLACES: REPLACED BY: QUANTITY VALUE 1 ASSEMBLED CHASSIS WD.00.2063 1 CHASSIS WD.00.2062 1 ASSEMBLED SOFT START CIRCUIT 11.0539B 6 MINIATURE SUPPORT MSP-4N 2 SCREW M4x20 DIN7985 2 METAL WASHER M4 SEG.
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  • Page 84 All manuals and user guides at all-guides.com PARTS LIST: MECHANICAL POWER SUPPLY DIAGRAM MODEL : PAM2600/2000 DRW. No 30.0045PL REV: DATE: 180795 SHEET 1 OF REPLACES: REPLACED BY: QUANTITY VALUE 1 ASSEMBLED CHASSIS 2063 AND CHASSIS 2062 12 SCREW M4x6 SPANLO DIN7985 4 METAL WASHER M4 ADE 2 TRANSFORMER 64AD211 (PAM2600) 2 TRANSFORMER 51AD180 (PAM2000)
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  • Page 86 All manuals and user guides at all-guides.com PARTS LIST: MECHANICAL DIAGRAM REV: D MODEL:PAM2600/2000 DRW.Nº 300046PL REPLACES: DATE: 200599 SHEET REPLACED BY: QUANTITY DESCRIPT SCREW 5.1x20 DIN CL81Z SCREW M4x6 SPANLO DIN7985 SCREW M4x12 DIN965 SCREW M4x12 SPANLO DIN965 SCREW M4x12 DIN7985 SCREW M3x12 DIN966 SCREW 2.9x6.5 DIN7981 SCREW M4x8 ALLEN DIN912...
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  • Page 88 All manuals and user guides at all-guides.com PARTS LIST: MECHANICAL DIAGRAM REV: C MODEL:PAM2600/2000 DRW.Nº 300046PL REPLACES: DATE: 200599 SHEET REPLACED BY: QUANTITY DESCRIPT SCREW 5.1x20 DIN CL81Z SCREW M4x6 SPANLO DIN7985 SCREW M4x12 DIN965 SCREW M4x12 SPANLO DIN965 SCREW M4x10 DIN7985 SCREW M3x12 DIN966 SCREW 2.9x6.5 DIN7981 SCREW M4x8 ALLEN DIN912...
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  • Page 90 All manuals and user guides at all-guides.com PARTS LIST: MECHANICAL DIAGRAM MODEL : PAM2600/2000 DRW. No 30.0046PL REV: DATE: 050995 SHEET 1 OF REPLACES: REPLACED BY: QUANTITY VALUE 8 SCREW 5.1x20 DIN CL81Z 43 SCREW M4x6 SPANLO DIN7985 8 SCREW M4x12 DIN965 4 SCREW M4x12 SPANLO DIN965 1 SCREW M4x12 DIN7985 4 SCREW M3x12 DIN966...
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  • Page 92 All manuals and user guides at all-guides.com PARTS LIST: PACKING DIAGRAM MODEL : PAM2600/2000 DRW. No 32.0014PL REV: DATE: 260795 SHEET 1 OF REPLACES: REPLACED BY: QUANTITY VALUE 4 METAL WASHER 5x11.5x0.8 4 WASHER AT 5x11.5x3.5 ABS BLACK 2 FUSE T16A 1 STANDARD BOX 528x215x623 4 POLYURETHANE PROTECTING HALF (M940) 1 STANDARD BAG 650x740...
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  • Page 98 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2000 DRW.Nº 33.0129PL REV : A DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE C101 47µ/100 C102 C100n C103 10µ/50 C104 10µ/50 C105 C15p C106 C100n C107 C100n C108...
  • Page 99 All manuals and user guides at all-guides.com PARTS LIST: POWER CIRCUIT AND SHORT CIRCUIT PROTECTION MODEL:PAM2000 DRW.Nº 33.0129PL REV : A DATE: 000621 SHEET REPLACED BY: REFERENCE VALUE IC105 LM35D J101 FASTON 6.3mm J102 FASTON 6.3mm J103 FASTON 6.3mm J104 B3P-VH J105 B3P-VH...
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Pam 2600

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