Gebruiksaanwijzing /service van het product PRECISION 8i van de fabrikant True Manufacturing Company
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TRUE systems PRECISION 8i 8-CHANNEL PRECISION MICROPHONE PREAMPLIFIER with M/S decoding and Direct Inputs OPERATION MANUAL Version 1.2.
2 SAFETY and OPERATING PRECAUTIONS Important Inform ation: Th is symbol indicates the presence of dangero us voltage within the product enclosure that presents the risk of electric shock injury. When this symbol appears next to an operation discussed in this manual, only qualified technical personnel should perform that operation.
3 CERTIFICATIONS Declaration of Conformity – CE Sunrise Engineering and Design Inc. hereby declares the T R U E S y s t e m s PRECISION 8i 8 - channel microphone preamplifier to be in material confo.
PRECISION 8i OPERATION M ANUAL 4 CONTENTS SAFETY and O PERATING PRECAUTIONS 2 CERTIFICATIONS 3 Owner’ s Record 3 Table of Contents 4 INTRODUCTION 5 PRODUCT O VERVIEW 5 UP - AND - RUNNIN G IN A HURRY.
PRECISION 8i OPE RATION MANUAL 5 INTRODUCTION The PREC ISIO N 8i is designed to provide the detailed, transparent sonic performance necessary for the most critical direct tracking and live sound applications. It includes a unique combination of functions that make it useful as a complete input system for standalone or PC - based recording systems.
PRECISION 8i OPE RATION MANUAL 6 UP - AND - RUNNIN G IN A HURRY 1. Read the “ Safety and O perating Prec autions ” on page 2 of this manual. 2. Check the voltage selector on the International Power Supply Module (PSU - P8 i) to make sure it is set for the appropriate AC mains voltage in your area.
PRECISION 8i OPE RATION MANUAL 7 About the Lev el and Pea k-Hold Indi cators: 1. SIG indicates that a signal is present on the channe l. It illuminates when the signal level exceeds -24dBu. 2. +4 illuminates when the output signal reaches normal operating level of +4 dBu.
PRECISION 8i OPE RATION MANUAL 8 Mounting The PR EC IS I O N 8 i is designed for conventional rack mounting, or stand -alone mounting by use of the adhesive rubber f eet supplied. Avoid locating the unit next to equipment that emits strong electromagnetic fields.
PRECISION 8i OPE RATION MANUAL 9 To change the AC operating voltage selection: This procedure should be performed only by qualified technical personnel. If you are not qualified, please consult T RUE Sys te ms or your de aler for assistance. 240 1 2 1) Using an appropriate AC voltmeter, measure the AC line voltage at the installation site.
PRECISION 8i OPE RATION MANUAL 10 must be of the same type. AC mains power cord must be removed to gain access to Fuse Drawer 1 for fuse replacement. BALANCED OUT 1 2 3 4 5 6 7 8 1-8 (4-40) 3 4 LINK CONNECT ONL Y PSU-P8i DO NOT DI SCON NECT W ITH AC POW ER ON S/N Sunrise Engineering and Design Inc.
PRECISION 8i OPE RATION MANUAL 11 M IC 1 M IC 2 M IC 3 M IC 4 M IC 5 M IC 6 M IC 7 M IC 8 Di re ct In 1 Di re ct In 2 M S PIN 2 + PIN 3 - 5 6 Micropho ne Connecti on: Microphone connection is made to standard XLR receptacles on the rear panel.
PRECISION 8i OPE RATION MANUAL 12 Use high - qualit y, low capacita nce cable. Braided shielding and “ star quad” ty pe mic cables will perform better in electrically noisy environments. Manufacturers such as Canare , Mogami (and others) make high performance cable of this type.
PRECISION 8i OPE RATION MANUAL 13 activat es at peak level minus 6 dB. Generally, the PEAK RE FERENCE selector is set for the maximum level you want to present to your mixing console, recorder, etc. Depress RESET 10 to clear PK. NOTE: Only the OL light indicates impending preamp overload.
PRECISION 8i OPE RATION MANUAL 14 9 PEAK REFERENCE selector. This sets the level at which the Peak -Hold indicators 4 activate. It also changes the operating level indication 6 to - 10 dBV operation when the -10 dBV position is selected. 10 Peak- Hold reset.
PRECISION 8i OPE RATION MANUAL 15 Drum kits: use an M-S pair for drum overhead micing. Vocal and instrumental ensembles: use M - S to give realistic perspective to backup vocals or instrumental groups. Individual instruments or vocals: try M - S on acoustic guitar and in situatio ns where you wish to capture room ambience.
PRECISION 8i OPE RATION MANUAL 16 DESIGN APPROAC H PR EC ISIO N 8i features a high - voltage composite architecture with discrete devices plus integrated circuits. The totally balanced, dual servo, dc - co up led des ign pr ovi des exceptional t ransient response, headroom, imaging and noise performance.
PRECISION 8i OPE RATION MANUAL 17 TROUBLE SHOOTING T Symptom No signal output. Main power switch is on, but no LED’ s are illuminated. Solution Check AC power source and cord. Check fuses (pull fuse drawer next t o power cord inlet) No signal output.
PRECISION 8i OPE RATION MANUAL 18 Channel 1 signal can be heard in Channel 2 output - and vice versa. Check status of M-S selector. It should be “ out” for individual channel mode and “ in” for Mid-Side mode. Channel 2 see ms to have no output when used with Channel 1 as a stereo pair Check status of M-S selector.
PRECISION 8i OPE RATION MANUAL 19 repaired or replaced at the m anufacturer’ s option, free of charge. Supplementary shipping charges will apply to units returned to addresses outside the continental USA. All units returned to SUNRISE or authorized TRUE systems repair facility must be prepaid , insured an d p r op er l y p ac k ag ed .
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