bryston_bp20_25_en电路图.pdf

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1、OWNERS MANUAL InstructionsInstructions For Bryston For Bryston PreAmplifiersPreAmplifiers ModelsModels BP20BP20 it is replaced, instead with a “Mono / Stereo” switch. Please note that it is important that your phono cartridge is connected to the correct inputs in order to achieve proper performance.

2、 Input impedance is 180 ohms and sensitivity is 350uV. DIGITAL AUDIO INPUT MODULE (Optional): The BP20DA / BP25DA models contain two SPDIF com- patible digital audio inputs. To select either the DAC-1 or DAC-2 digital audio input, first set the rotary SOURCE selector to DAC, and then select between

3、the two SPDIF inputs with the DAC-1/ DAC-2 toggle switch. The digital-to- analog convertor can handle input sample rates from 16KHz to 108KHz, and word lengths of 16, 18, 20 or 24 bits. VISUAL INDICATORS: MPS1 Power Supply:The LED on the front panel of the MPS1 lights GREEN when power is on and RED

4、when the power is on but the main outputs are muted by having acti- vated either the “Mute/Normal” toggle switch (on the pre- amps front panel) or the “MUTE” button on the hand held remote control. BP20/25:The three colour LED (light emitting diode) located on the front panel lights RED when the out

5、put is muted, GREEN when the output signal is non-inverting polarity and YELLOW when the output signal is inverted with respect to the input. When the LED is unlighted, the power is off. FRONT PANEL CONTROLS: MUTE/NORMAL TOGGLE SWITCH: Mutes or releases mute at the main outputs, (not To Tape outputs

6、), without changing the volume control setting, each time pushed. POLARITY/INVERT TOGGLE SWITCH: Reverses polari- ty at main output5 each time pushed. (GREEN LED indi- cates positive polarity, YELLOW LED indicates inverse polarity). VOLUME CONTROL:Rotary control varies the output level to the MAIN O

7、UTPUTS, (does not effect TO TAPE outputs). BALANCE: Rotary control adjusts the left-versus- right channel levels. BALANCE CONTROL: is a tailored-inflection type which has very gradual action near the center of rotation allow- ing fine adjustments to the stereo image. For convenience the electrical c

8、enter of the control is detented. SOURCE SELECT SWITCH:Rotary switch determines which input will appear at the “TO TAPE” outputs for recording or processing, as well as determining which pro- gram is available at the Main outputs. (When the “TAPE/SOURCE” switch is in “Tape” position, “FROM TAPE” inp

9、uts appear at Main Outputs). MONO/STEREO SWITCH: “Stereo” position provides two-channel stereo at the Main outputs. Mono position sums the main outputs to monaural. The TO TAPE out- puts are always stereo. (Switch not present on “-MC” or “- DA” models). MC/MM PHONO SWITCH: This switch is present on

10、the BP20MC & BP25MC models only. It allows the selection of either Moving-Magnet or Moving-Coil phono equaliza- tion. This switch takes the place of the “Mono/Stereo” tog- gle switch on other BP20/25 models. DAC-1/DAC-2 TOGGLE SWITCH: Only on BP20DA & BP25DA models, this switch determines which of t

11、he two SPDIF digital audio inputs is processed and then sent to the tape and main outputs. The SOURCE select switch must also be in the “DAC” position to monitor the digital audio inputs. TAPE/SOURCE SWITCH: “Source” position monitors whichever input is selected at the rotary SOURCE selector rotary

12、switch. “Tape” position provides monitoring of the “FROM TAPE” input for A/B comparison with the source. Should an external processor or equalizer be connected in the tape loop, the TAPE / SOURCE” switch will act as an in/out switch for the external equipment. 5 BP20/25 PreAmplifiers 6 BRYSTON 20 -Y

13、EAR WARRANTY Bryston products are warranted to be free from manufacturing defects for a minimum of twenty years from the original date of manufacture. This includes parts, labour and return shipping to the first owner and all subsequent owners. Warranty coverage is automatic and commences with the o

14、riginal date of manufacture which is kept on file at Bryston. In the event of a defect or malfunction, Bryston will remedy the problem by repair or replacement, as we deem necessary, to restore the product to full performance. This warranty is considered void if the defect, mal- function or failure

15、of the product or any component part was caused by damage ( not resulting from a defect or malfunction ) or abuse while in the pos- session of the customer. Tampering by persons other than factory authorized service personnel, or failure to fully comply with Bryston operating instructions, voids the

16、 warranty. This warranty gives you specific legal rights and you may also have other rights which may vary from province to province and country to country. BRYSTONSERVICEUSA.:BRYSTONSERVICEOUTSIDECANADA&theUSA: 70COVENTRYST.SUITE#5CONTACTYOURLOCALDISTRIBUTOR NEWPORTVERMONTOR U.S.A.05855CHECKOURWEBSITEAT:wwwbryston.ca E-MAILBRYSTONDIRECTLY:infobryston.ca PHONE:802-334-1201FAXBRYSTONDIRECTLY:705-742-0882 FAX:802-334-6658PHONEBRYSTONDIRECTLY:705-742-5325 E-MAIL:usaserbryston.ca BRYSTONLTD.,677NEALDRIVE,P.O.BOX2170,PETERBOROUGH,ONTARIOCANADAK9J7Y4