yba_p1000_service_en 电路图 维修手册.pdf

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1、 1 P1000 AMP (stereo and mono) SERVICE MANUAL Rev 1.0 For more information on YBA products, please visit www.yba.fr For support on YBA products service or spare parts, please contact serviceyba.fr RadioFans.CN 收音机爱 好者资料库 2 CONTENTS 1. Schematic of the amplifier PCB p.3 2. Layout of the amplifier PCB

2、 p.4 3. Assembly of the amplifier PCB p.6 4. AMP1000 Stereo assembly p.8 5. AMP1000 Mono assembly p.9 6. Bias setting p.10 7. Known issues p.11 RadioFans.CN 收音机爱 好者资料库 3 I. Schematic of the amplifier PCB RadioFans.CN 收音机爱 好者资料库 4 II. Layout of the amplifier PCB Part list : Capacitor 150pF (x3) R SET

3、A 0.56W (x16) R SETA 10W (x2) 5 Trimmer 1k (x1) R YBA 110 (x7) R YBA 500 (x1) R YBA 1k2 (x5) R YBA 1k8 (x1) R YBA 2k2 (x2) R YBA 3k3 (x3) R YBA 4k7 (x2) R YBA 10k (x4) R YBA 47k (x2) Transistor 2N5551 (x2) Transistor 2N5401 (x2) Transistor 2N5416 (x1) Transistor 2N3440 (x1) Transistor MJE15030 (x3)

4、Transistor MJE15031 (x2) Transistor MJ15024 (x8) Transistor MJ15025 (x8) Capacitor 10F 100V (x3) Capacitor 0.1F (x1) Capacitor 0.33F (x7) Capacitor 100F 100V (x5) Capacitor 470F 63V (x2) Notes : - Output transistors should be matched in gain before replacement. Good matching makes bias and offset se

5、tting easier. - When one or more output transistor is broken, it is recommended to change the whole set of power devices. - Components are soldered on top side of the PCB - T9 (MJE15030) must be soldered once PCB is installed on its metal socket - Power transistors must be soldered after PCB is inst

6、alled on its metal socket 6 III. Assembly of the amplifier PCB 1. place moons (blue isolation sockets) on the brass plate 2. add some thermal grease as shown in the previous image 3. join both aluminium and brass plates 4. insert transistor isolation plates on each sides 5. fix the amplifier PCB on

7、the upper side using the 4 screw holes 6. insert and isolate power transistors and fix them using M3*16 screws 7. solder B and E pins of power transistors 7 Details of connections : - connect 2 red wires from V+ pad to the positive side of the supply board - connect 2 blue wires from V- pad to the n

8、egative side of the supply board - connect 2 white wires from IN_GND pad to the GND side of the supply board (middle point of the transformer) - connect 4 red wires from Speaker output pads to the output inductance (preceding speaker terminal) - connect inputs IN+ and IN_GND pads to their respective

9、 input connectors using wires as short as possible (not exceeding 15 cm) 8 IV. AMP1000 Stereo assembly 9 V. AMP1000 Mono assembly 10 VI. Bias setting 11 VII. Known issues The Passion 1000 amplifier is not protected against output shorts and irremediable damage will be caused if speakers outputs are

10、shorted (through speaker cable from example). Do not connect the Passion 1000 amplifier to a preamplifier that outputs some significant DC component. Be sure to always power on your Passion 1000 amplifier after having powered up your preamplifier. To switch off your system, please proceed in the opp

11、osite order. a. Burnt output devices : While amplifier turned off, please measure with a Multimeter in diode mode the value at the speaker output, between the RED terminal and the ground (black terminal). The measured value should be stable and comprised between approx 500 and 900. If the value is n

12、ot stable, then one or more output transistor need to be changed. To determine which transistor need to be changed, you need to : 1. remove T7, T9 and T10 2. test T7, T9 and T10 (no short between C and E pins) 3. for each power transistor, a. disconnect its associated 0.56R emitter resistor b. remov

13、e its mounting collector screw c. test the continuity between its 3 electrodes, none should be in short circuit d. if there is a short circuit, replace the transistor e. reconnect the resistor and remount the screws of the transistor 4. if T7 and/or T9, and/or T10 are damaged, please replace them 5. you may also need to change R11 = 110R 6. with a multimeter in diode position, test again the value between the speaker output and the ground. Now it should be stable. 7. Peform a new bias setting. Correct value is around 10mV measured between a pair of 0.56R resistor.