background image

 

8

Troubleshooting 

Problem:

 If there is no power, check to see if... 

• 

The power cord is plugged into both the IEC socket on the rear panel of the unit and into the AC mains 

• 

The AC mains voltage is matched to the operating voltage requirements (See 

Changing Voltage

 in the 

Connecting the System 

section on page 3). If the AC mains voltage is higher than the V-8’s selected voltage 

it is possible that the fuse needs to be replaced. (See 

Changing Fuses

 in the 

Connecting the System 

section 

on page 3). 

• 

The power light is illuminated on the front panel of the V-88. If not, turn the power switch OFF and check the 
A/C mains fuse(s). NEVER USE A LARGER AMPERAGE FUSE THAN IS SPECIFIED! Turn the power switch back 
on. The power light should illuminate. 

• 

If a fuse change was needed and upon powering the monitor back up the fuse(s) blow again, the monitor 
needs to be returned to the dealer you purchased it from or to KRK for servicing. 

 

Problem:

 If you can't hear any sound... 

• 

Repeat steps in the previous troubleshooting section above before continuing to the next steps. 

• 

Check to see if all other audio devices using the same AC outlet are still operating. 

• 

Make sure that: 

• 

The audio source cable is plugged into both the source output and the monitor input. 

• 

The System Gain pot is turned up fully clockwise (+ 6 dB). 

• 

The signal source (E.g. mixing console, work station, CD player, etc.) is turned up to a level that can 
properly send a signal to the monitors. 

• 

If one of the monitors is working.  Exchange the audio input cable from the non-working monitor to the 
working unit.  This will determine whether it's really the monitor, a faulty cable, or some other glitch in 
the audio chain.  

• 

If the monitor is still not responding, it should be returned to the dealer that you purchased it from or to KRK 
for servicing. 

 

Problem:

 If the monitor suddenly stops working... 

• 

Turn the monitor send down or off. 

• 

Repeat steps in the troubleshooting sections above before continuing to the next steps. 

• 

Carefully check to see if the amplifier's back plate is hot!  If the monitor has been running at highest power 
output for an extended period of time, it could be that the unit has become overheated and the protection 
circuitry has shut the system down momentarily.  The V-88 provides maximum circuitry protection against 
AC power surges, amplifier overdrive, and overheating of the amplifiers.  Turn the monitor off then wait 30 
minutes to allow the back plate to cool down.  Turn the power switch back on. 

• 

Increase the volume to check for normal operation. 

• 

If the monitor is still not responding, it should be returned to the dealer that you purchased it from or to KRK 
for servicing.  

 

Problem:

 The sound quality changes... 

 

• 

Repeat steps in the previous troubleshooting section above before continuing to the next steps. 

• 

Disconnect the signal cable at the input of the monitor. With power on, place your ear close to each driver 
(tweeter/woofer) and listen for noise (i.e., a slight hiss or hum).  If there's absolutely no sound whatsoever, 
it could be that one or more of the drivers (woofer or tweeter or both) is at fault. It's also possible that the 
problem lies somewhere in the electronics. 

Содержание V-88

Страница 1: ...M O D E L V 88 VIDEO SHIELDED BI A M P L I F I E D S T U D I O M O N I T O R KRK SYSTEMS LLC 5452 BUSINESS DRIVE HUNTINGTON BEACH CA 92649 TEL 714 373 4600 FAX 714 373 0421 WEB SITE WWW KRKSYS COM EMAIL SALES KRKSYS COM ...

Страница 2: ...nitor performance at more affordable prices The V Series class of Powered Studio Monitors was created to address these needs Please take a few moments to review the information in this guide FEATURES OVERVIEW 1 Neutrik Combo Connector accepts XLR phone and TRS connectors 2 System Gain control adjusts overall input sensitivity of the monitor 3 High Frequency Adjustment allows 3 step adjustment of h...

Страница 3: ...nel mounted 3 position toggle switch Range of control is 1dB Flat or 1dB shelving above 1 kHz Factory setting for your V 88 is flat toggle switch is in middle position Room acoustics may dictate which type of adjustment you need to make to retain a flat frequency response from the monitor See additional information in Installing Your Monitors section on page 4 LF ADJUSTMENT Low Frequency turnover ...

Страница 4: ... note when making fuse changes the fuses will have to be replaced see Changing Fuses section below Make sure and align the white arrow with the raised arrow located on the power entry module before reinstalling Check to see if the correct voltage can be read from left to right in the voltage window before powering up CHANGING FUSES Under normal operation the fuses should not blow A blown fuse usua...

Страница 5: ...ng console But when ideal positioning isn t practical low frequency control is the solution Lets say you have two different studios in your facility in one room the V 88 s are close to the wall in the other they re further away from the wall Simply adjust the low frequency on each monitor and you ll have the same sound in each room This comes in handy if you re tracking in room A and mixing down i...

Страница 6: ...d look like the set up in Figure 3 This set up may not be practical or possible in your room Once you have set up your monitors Listen to some program material that you know has low frequency information recorded on it Different locations may create a phase misalignment Most Subwoofers have a phase switch on them Flip the phase switch The bass response volume will either increase or decrease in vo...

Страница 7: ... to adjust the SYSTEM GAIN pots see page 2 for each monitor so that all channels have exactly the same SPL output at the listening position Although this can be done simply by listening to each channel one at a time and adjusting for relative levels we recommend using an SPL meter and filtered noise pink noise to test each channel independently Simply take a reading from each monitor and then adju...

Страница 8: ... to deliver superior linear frequency response Active filter crossovers generate less heat resulting in no signal drift or component variations to provide a more stable image Balanced Power KRK s amplifier construction is proven durable and straightforward Output wattage is balanced to match LF and HF driver sensitivities and power handling Your V 88 monitor uses a toroidal power transformer for l...

Страница 9: ...ing Exchange the audio input cable from the non working monitor to the working unit This will determine whether it s really the monitor a faulty cable or some other glitch in the audio chain If the monitor is still not responding it should be returned to the dealer that you purchased it from or to KRK for servicing Problem If the monitor suddenly stops working Turn the monitor send down or off Rep...

Страница 10: ...the System section on page 4 of this manual to ensure that the AC mains is matched to the operating voltage requirements All audio equipment should use the same ground point Check all other devices using the same AC output in the building like dimmers neon signs TV screens and computer monitors These devices should not be using the same circuit For updated Troubleshooting information please visit ...

Страница 11: ...10 ...

Страница 12: ...AMPLIFIER Power Rating 60 Watt HF Amplifier 160 Watt LF Amplifier Signal to Noise 90dB T H D 05 at full output 1khz Input Impedance 10k Ohms Balanced Input Input Sensitivity 6dB to 30dB Gain 26dB Fixed Power Consumption 160 VA THE V 88 CROSSOVER Crossover Frequency 2 3kHz Crossover Slope HF 12dB Octave Butterworth LF 12dB Octave Butterworth Subsonic Filter 12dB Octave 3dB 21Hz FEATURES Neutrik Com...

Страница 13: ...12 KRKandV 88areregisteredtrademarksofKRKSystems LLC ...

Страница 14: ...nstructions The Safety instructions should be kept for future reference WARNING Power Sources This equipment should be operated only from power source indicated on the product This equipment is intended to be used with a main power system with a grounded neutral conductor The third grounding pin is a safety feature do not attempt to bypass or disable Servicing Refer all Servicing to qualified pers...

Страница 15: ...sk of electric shock to humans The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product CAUTION To reduce the risk of electric shock do not remove the cover No user serviceable parts inside Refer servicing to qualified service person WARNING To prevent ...

Страница 16: ...ualifié Attention Lire les instructions Prendre connaissance de toutes les consignes de sècurité et d exploitation avant d utiliser le matériel Avertissement Alimentations Ne faire fonctionner ce matériel qu avec la source d alimentation indiquée sur I appareil Ce matériel doit être utilisé avec une alimentation principale comportant un fil de terre neutre Le troisième contact de mise à la terre c...

Страница 17: ...l intérieur d un triangle équilatéral est employé pour alerter les utilisateurs de la présence d instuctions importantes pour le fonctionnement et l entretien service dans le livret d instructions accompagnant l appareil ATTENTION Pour eviter les risques de choc électrique ne pas enlever le courvercle Aucun entretien de piéces intérieures par l usager Confier l entretien au personnel qualifié AVIS...

Отзывы: