How it Works
Ecler
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APA1400
User Manual
138 pgs11.29 Mb0
User Manual
38 pgs620.25 Kb0
Table of contents
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Ecler APA600, APA1400, APA1000 User Manual

APA1400 APA1000
APA600
SERVICE MANUAL
5
4
SPCLIPTH
6
3
2
1
7
8
9
0
10
5
4
6
SP TH
3
2
1
0
CLIP
7
PROT
8
9
10
CHANNEL 2CHANNEL 1
APA1400
SWITCHING POWER MOSFET AMPLIFIER
RLEEC
POWER
OFF
ON
5
4
SPCLIPTH
PROT
6
3
2
1
7
8
9
0
10
5
4
6
SP TH
3
2
1
0
CLIP
7
PROT
8
9
10
CHANNEL 2CHANNEL 1
APA1000
SWITCHING POWER MOSFET AMPLIFIER
RLEEC
POWER
OFF
ON
456
SPCLIP
3
PROT
2
1
0
10
456
7
3
2
8
1
9
0
SPTH
CLIP
7
PROT
8
9
10
CHANNEL 2CHANNEL 1
APA600
SWITCHING POWER MOSFET AMPLIFIER
RLEEC
POWER
OFF
ON
SERVICE MANUAL APA1400/1000/600

INDEX

- BLOCK DIAGRAM
- FUNCTIONING DESCRIPTION
- SCHEMATICS
- COMPONENTS LOCATION SCHEMA AND PART LIST
- TESTING AND QUALITY CONTROL
- TECHNICAL CHARACTERISTICS
- WIRING DIAGRAM
- CONFIGURATION DIAGRAM
- MECHANICAL DIAGRAM
- PACKING DIAGRAM
author: Queralt date: 000519
C
E
num:
The amplifying stage basic structure is actually the one commonly used until now, this is, a push-pull mounted A-B class amplifier, using P-type (IRFP9240) and N-type (IRFP240) mosfets.
The system's controlling core is a NE5534 OpAmp, which is internally compensated in order to obtain an amplifying gain ratio equal or greater than 3. The amplifier's feedback runs through a resistor and a capacitor associated to the OpAmp's non­inverting input.
Transistors BF871 and BF872 are common-base configured, becoming actually a current source structure. They accomplish a dual function: on one hand, they polarise the mosfet's gate-source junction, keeping them on their conduction knee. On the other hand, they carry out the OpAmp's output voltage variations, referred to signal ground.
The polarisation current adjustment is fixed by a 2k5 trimming potentiometer connected to the BF transistors base. This current is added to the current source's output, which passes through the BF-transistors load resistors. The bias current stability against temperature is fixed through the BD437 transistors. Their temperature- dependent base emitter voltage curve is used to alter adequately the current source's reference voltage. As a consequence, if the temperature rises, the reference voltage decreases, thus the gate-source voltage also does, and finally the bias current also decreases.
LER
52.0007 version: 01.00
approved:
title:

FUNCTIONING DESCRIPTION

POWER MODULE
The Zobel network, formed by a resistor-inductor-capacitor group, and which is located at the amplifier's output, intends to keep the amplifier's load impedance as constant as possible, no matter which load is connected to the stage's output, or which signal frequency is to be amplified, in order to prevent an inverted-phase feedback signal.
In order to avoid a DC offset on the output signal, a diac-triac tandem system is used, which shorts the output to signal ground when the DC level is enough to get the diac triggered. To prevent this from happening while carrying audio signal (sine-wave, music), the diac's reference voltage is taken from a filter formed by resistor R149 and capacitor C124.
The protection circuitry supervises at any time the power consumed by the MOSFETS. The circuitry basically consists on two sections: MOSFET's drain current (Id) monitoring and drain-source voltage (Vds) monitoring. When the drain current exceeds a certain limiting value, a transistor (called control­transistor) becomes conducting, together with an auxiliary circuitry (helper), formed by a transistor (which is the same type as the control-transistor) and a 8'2V Zener diode. This value determines the point where the auxillary circuitry starts to run. The helper­transistor's base-emitter junction curve is used to obtain a non-linear variation on the MOSFETS gate-source voltage control, and thus on their drain current.
Sheet 1 of 2
author: Queralt date: 000519
C
E
num:
Moreover, as the helper-transistor's base-emitter current is temperature-dependent, the controlling circuitry (basically the control-transistor) compensates the safe operation area (SOA) drift due to temperature. If the MOSFET's drain-source voltage (Vds) drops too low, a second circuitry actuates to alter the control-transistor's triggering level, obtaining a SOA-like curve section and a current stage, which can be adjusted adequately in order to maintain the MOSFET's power consumption as close as possible to its SOA.
Moreover, the amplifier also includes an ANTICLIP system. When the amplifier reaches its clipping level, the OpAmp becomes unable to keep the system under control, and as a consequence ±V peaks appear at its output (15V power supply). This peaks are used to be rectified and sent to an optocupler (led­resistor) which modifies its impedance as a function of those peaks' amplitude. The resulting impedance is part of a voltage divider, together with the amplifier's input impedance. So, as the optocoupler increases its impedance, the amplifier's input signal level decreases until the system becomes stable.
LER
52.0007 version: 01.00
approved:
title:
FUNCTIONING DESCRIPTION
POWER MODULE
Also a dual-function temperature control circuitry is provided:
- Temperature-depending control of the cooling fan speed, whose voltage supply is variable between 7 and 14 Vac.
- Amplifier shutdown when temperature exceeds approximately 90ºC. The circuitry is formed by LM35D-type IC, which acts like a thermal probe, an amplifier, thermal probe level comparator and a 7805-type voltage regulator. The amplifier is responsible for the cooling fan speed control. The comparator triggers a relay, which cuts off the MOSFETs' bias current by shunting a 22W resistance to the BF-type transistors' load resistors. This way, the output signal of the amplifier is effectively cutted off.
The STAND-BY circuit. This circuit keeps the safety relay closed for about 10 seconds, thus the MOSFET's bias current is cutted off during this period, until the whole system reaches again a voltage-stable situation. Due to this, hearing annoying transients and noises during start up through the loudspeakers is avoided. This delay is obtained by a RC-cell, where R=287K, and C=47µF/50V. During start up, this RC-cell's voltage smoothly rises until the 40106-type Trigger-Schmitt trigging level is reached, and the amplifier starts functioning. C=47µF resets or discharges when the unit is turned off. During a short period of time, a BC817-type transistor acts like a switch, connecting two 75W parallel resistors to C=47µ/50V.
Sheet 2 of 2
author: Queralt date: 020430
C
E
num:
REFERENCE VALUE CODE
C101 100n FCXCN41000 C102 100n FCXCN41000 C103 100n FCXCN41000 C104 100n FCXCN41000 C105 47u/16 FCCE100000 C106 47u/16 FCCE100000 C107 47u/16 FCCE100000 C108 47u/16 FCCE100000 C109 100p FCXCN21000 C110 100p FCXCN21000 C111 100p FCXCN21000 C112 100p FCXCN21000 C113 22p 2% FCXCN12201 C114 22p 2% FCXCN12201 C115 22p 2% FCXCN12201 C116 22p 2% FCXCN12201 C117 47u/16 FCCE100000 C118 47u/16 FCCE100000 C119 47u/16 FCCE100000 C120 C100n/63V FCCDK11000 C122 47u/16 FCCE100000 C123 100n FCXCN41000 C124 100n FCXCN41000 C125 3300u/35 FCCE213300 C126 2200u/35V FCCE212200 C127 4700u/100 FCCE331525 C128 4700u/100 FCCE331525 C129 4700u/100 FCCE331525 C130 4700u/100 FCCE331525 C131 47u/50 FCCE250470 C132 47u/50 FCCE250470 C133 4700u/100 FCCE331525 C134 4700u/100 FCCE331525 C135 18n FCXCN40180 C136 18n FCXCN40180 C137 180n FCXCN41800 C138 180n FCXCN41800 C139 18n FCXCN40180 C140 18n FCXCN40180 D101 BAS28 FCXDDBAS28 D103 BAS28 FCXDDBAS28 D105 BAS28 FCXDDBAS28 D107 BAS28 FCXDDBAS28 D108 B250C1000 FCREC25100 D109 FB3506 FCREC35060 D110 BAS16 FCXDDBAS16 D111 1N4007 FCXDD40070 D112 1N4007 FCXDD40070 D113 BAS16 FCXDDBAS16 F101 FOR 230V T10A FCFUS60100 F101 FOR 115V T16A FCFUS60400 HS100 HEAT SINK FCRAD11515
40-0048-0101 EP03-99c&d.xls SHEET 1 OF 3
LER
40.0048 version: 01.01
approved:
model:
EP03-99C&D
PRINTED CIRCUIT 11.0774-01.04
PARTS LIST
PRINTED CIRCUIT 11.0774-01.04
REFERENCE VALUE CODE
IC101 TL072 FCIC072010 IC102 TL072 FCIC072010 IC103 7815 FCREG78150 IC104 7915 FCREG79150 IC105 TL072 FCIC072010 J101 YKF52-5005 FCBASX0900 J102 YKF52-5005 FCBASX0900 J103 YKB21-5009 FCBASJ0200 J104 YKB21-5009 FCBASJ0200 J105 BASE 4pins MALE FCCTAMP040 J106 BASE 4pins MALE FCCTAMP040 J107 BASE 9pins MALE FCCTAMP090 J108 B3B-EH-A FCCTM00030 J109 B5B-EH-A FCCTM00050 J110 FASTON 6.3mm FCTERMF630 J114 BASE 4pins MALE FCCTAMP040 J115 BASE 4pins MALE FCCTAMP040 J116 BASE 4pins MALE FCCTAMP040 J120 B6B-EH-A FCCTM00060 J123 B7B-EH-A FCCTM00070 J302 NL4MP Faston FCBASS0100 J303 NL4MP Faston FCBASS0100 MJ101 JUMPER FCMJ000100 MJ102 JUMPER FCMJ000100 MJ103 JUMPER FCMJ000100 MJ104 JUMPER FCMJ000100 PF101 A0854668 FCPORF0100 PF102 A0854668 FCPORF0100 R101 100k0 FCXR151000 R102 100k0 FCXR151000 R103 100k0 FCXR151000 R104 100k0 FCXR151000 R105 100.0Ω FCXR121000 R106 100.0Ω FCXR121000 R107 100.0Ω FCXR121000 R108 100.0Ω FCXR121000 R109 100k0 FCXR151000 R110 100k0 FCXR151000 R111 100k0 FCXR151000 R112 100k0 FCXR151000 R113 24k3 FCXR242430 R114 24k3 FCXR242430 R115 24k3 FCXR242430 R116 24k3 FCXR242430 R117 24k3 FCXR242430 R118 24k3 FCXR242430 R119 24k3 FCXR242430 R120 24k3 FCXR242430 R121 1k0 FCXR131000 R122 1k0 FCXR131000 R123 100k0 FCXR151000 R124 340k FCXR153400 R126 1k54 FCXR131540 R127 1k0 FCXR131000 R128 1k0 FCXR131000 R129 340k FCXR153400 R130 1k54 FCXR131540 R131 36k5 FCXR143650
40-0048-0101 EP03-99c&d.xls SHEET 2 OF 3
PRINTED CIRCUIT 11.0774-01.04
REFERENCE VALUE CODE
R132 715k FCXR157150 R133 178k FCXR151780 R134 36k5 FCXR143650 R135 715k FCXR157150 R136 178k FCXR151780 R137 1k50 FCXR131500 S101 NS42J11 FCINTAP080 S102 17128 FCINTD4000 SC100 M4x12 TR FCT3804012 TS101 T-120 FCTERMF280 W100 19mm FCMECPON19 WI101 1016.04.00 FC2F016400 WI102 1017.04.00 FC2F017400 WI104 1024.04.50 FC6J024450 WI105 1024.04.50 FC6J024450 WI106 1005.04.50 FC4I005450 WI107 1005.04.50 FC4I005450 WI305 1025.01.80 FC0H025180 WI306 1025.01.80 FC0H025180 WI307 1025.01.80 FC0H025180 WI308 1025.01.80 FC0H025180
40-0048-0101 EP03-99c&d.xls SHEET 3 OF 3
author: Queralt date: 000913
C
E
num:
REFERENCE VALUE CODE
C101 100n FCXCN41000 C102 100n FCXCN41000 C103 100n FCXCN41000 C104 100n FCXCN41000 C105 47u/16 FCCE100000 C106 47u/16 FCCE100000 C107 47u/16 FCCE100000 C108 47u/16 FCCE100000 C109 100p FCXCN21000 C110 100p FCXCN21000 C111 100p FCXCN21000 C112 100p FCXCN21000 C113 22p 2% FCXCN12201 C114 22p 2% FCXCN12201 C115 22p 2% FCXCN12201 C116 22p 2% FCXCN12201 C117 47u/16 FCCE100000 C118 47u/16 FCCE100000 C119 47u/16 FCCE100000 C120 C100n/63V FCCDK11000 C122 47u/16 FCCE100000 C123 100n FCXCN41000 C124 100n FCXCN41000 C125 3300u/35 FCCE213300 C126 2200u/35V FCCE212200 C127 4700u/100 FCCE331525 C128 4700u/100 FCCE331525 C129 4700u/100 FCCE331525 C130 4700u/100 FCCE331525 C131 47u/50 FCCE250470 C132 47u/50 FCCE250470 C133 4700u/100 FCCE331525 C134 4700u/100 FCCE331525 C135 18n FCXCN40180 C136 18n FCXCN40180 C137 180n FCXCN41800 C138 180n FCXCN41800 C139 18n FCXCN40180 C140 18n FCXCN40180 D101 BAS28 FCXDDBAS28 D103 BAS28 FCXDDBAS28 D105 BAS28 FCXDDBAS28 D107 BAS28 FCXDDBAS28 D108 B250C1000 FCREC25100 D109 FB3506 FCREC35060 D110 BAS16 FCXDDBAS16 D111 1N4007 FCXDD40070 D112 1N4007 FCXDD40070 D113 BAS16 FCXDDBAS16 F101 FOR 230V T10A FCFUS60100 F101 FOR 115V T16A FCFUS60400 HS100 HEAT SINK FCRAD11515
40-0048-0100 EP03-99c&d.xls SHEET 1 OF 3
LER
40.0048 version: 01.00
approved:
model:
EP03-99C&D
PRINTED CIRCUIT 11.0774-01.03
PARTS LIST
PRINTED CIRCUIT 11.0774-01.03
REFERENCE VALUE CODE
IC101 TL072 FCIC072010 IC102 TL072 FCIC072010 IC103 7815 FCREG78150 IC104 7915 FCREG79150 IC105 TL072 FCIC072010 J101 YKF52-5005 FCBASX0900 J102 YKF52-5005 FCBASX0900 J103 YKB21-5009 FCBASJ0200 J104 YKB21-5009 FCBASJ0200 J105 BASE 4pins MALE FCCTAMP040 J106 BASE 4pins MALE FCCTAMP040 J107 BASE 9pins MALE FCCTAMP090 J108 B3B-EH-A FCCTM00030 J109 B5B-EH-A FCCTM00050 J110 FASTON 6.3mm FCTERMF630 J114 BASE 4pins MALE FCCTAMP040 J115 BASE 4pins MALE FCCTAMP040 J116 BASE 4pins MALE FCCTAMP040 J120 B6B-EH-A FCCTM00060 J123 B7B-EH-A FCCTM00070 J302 NL4MP Faston FCBASS0100 J303 NL4MP Faston FCBASS0100 MJ101 JUMPER FCMJ000100 MJ102 JUMPER FCMJ000100 MJ103 JUMPER FCMJ000100 MJ104 JUMPER FCMJ000100 PF101 A0854668 FCPORF0100 PF102 A0854668 FCPORF0100 R101 100k0 FCXR151000 R102 100k0 FCXR151000 R103 100k0 FCXR151000 R104 100k0 FCXR151000 R105 100.0Ω FCXR121000 R106 100.0Ω FCXR121000 R107 100.0Ω FCXR121000 R108 100.0Ω FCXR121000 R109 100k0 FCXR151000 R110 100k0 FCXR151000 R111 100k0 FCXR151000 R112 100k0 FCXR151000 R113 24k3 FCXR242430 R114 24k3 FCXR242430 R115 24k3 FCXR242430 R116 24k3 FCXR242430 R117 24k3 FCXR242430 R118 24k3 FCXR242430 R119 24k3 FCXR242430 R120 24k3 FCXR242430 R121 1k0 FCXR131000 R122 1k0 FCXR131000 R123 100k0 FCXR151000 R124 340k FCXR153400 R126 1k54 FCXR131540 R127 1k0 FCXR131000 R128 1k0 FCXR131000 R129 340k FCXR153400 R130 1k54 FCXR131540 R131 36k5 FCXR143650
40-0048-0100 EP03-99c&d.xls SHEET 2 OF 3
PRINTED CIRCUIT 11.0774-01.03
REFERENCE VALUE CODE
R132 715k FCXR157150 R133 178k FCXR151780 R134 36k5 FCXR143650 R135 715k FCXR157150 R136 178k FCXR151780 R137 1k50 FCXR131500 S101 NS42J11 FCINTAP080 S102 17128 FCINTD4000 SC100 M4x12 TR FCT3804012 TS101 IB.311 FCTERMSOL0 W100 19mm FCMECPON19 WI101 1016.04.00 FC2F016400 WI102 1017.04.00 FC2F017400 WI104 1024.04.50 FC6J024450 WI105 1024.04.50 FC6J024450 WI106 1005.04.50 FC4I005450 WI107 1005.04.50 FC4I005450 WI305 1025.01.80 FC0H025180 WI306 1025.01.80 FC0H025180 WI307 1025.01.80 FC0H025180 WI308 1025.01.80 FC0H025180
40-0048-0100 EP03-99c&d.xls SHEET 3 OF 3
ECL ER
51.0078
num:
version:
01.00
author: approved:
J. Colomines
date: title:
020426
project:
product:
TECHNICAL BRIEFING
Announcement addressed to Technical Support Services
Involved series:
APA1400 / APA1000 / APA600 PAM1100 / PAM2100 MPA4-80 / MPA6-80 / MPA4-150
VOLUME potentiometer replacement.
Replaced service part code: FCPR210040
When this potentiometer is being replaced, after soldering it on the printed circuit board, the two leads should be shorted as shown in the picture, in order to ensure a correct performance depending on the available service part.
POWER AMPLIFIERS
51-0078-0100 Potenciòmetre etapes.doc 1 of 1
author: Queralt date: 000913
C
E
num:
REFERENCE VALUE CODE
D101 LED3G FCLED300VE D102 LED3G FCLED300VE D103 LED3R FCLED300RO D104 LED3Y FCLED300AM D105 LED3R FCLED300RO D106 LED3Y FCLED300AM D107 UNFITTED FCLED300AM R101 10kAx2 FCPR210040 R102 10kAx2 FCPR210040 W100 7.5mm FCPONT0075 W101 12.5mm FCPONT0125 W102 7.5mm FCPONT0075 W103 7.5mm FCPONT0075 WI101 1005.04.50 FC4I005450 WI102 1007.05.00 FC4K007500 WI103 1004.01.80 FC4G004180 WI104 1004.01.80 FC4G004180
LER
40.0049 version: 01.00
approved:
model:
EP03-99C&D
PRINTED CIRCUIT 11.0775-01.01
PARTS LIST
40-0049-0100 EP03-99c&d.xls SHEET 1 OF 1
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