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Version  1d: 01.99

Page  

Service manual

HHB Circle 5A 

Powered Monitor speaker

Manual: Version 1d    01.1999

This manual is subject to change without notice.

Always check with HHB that you are using the latest version.

Also available as an Adobe Acrobat V3 file.

When printing this file, for clear sharp pictures on a black & while laser, it may be necessary

to adjust your printer driver’s ‘Print half tone’ settings. If you have a 600dpi printer, setting the

half tone to around 45 lines per inch will give a clean sharp image, where as the default -

around 60lpi may give a dark image to pictures..

WARNING! DANGER OF ELECTRICAL SHOCK

Opening mains operated equipment like the HHB Circle5A incurs a risk of electric

shock.

DO NOT attempt to open this equipment unless you are qualified to do so, have the neces-

sary test equipment and are operating the Circle 5a from an ISOLATED POWER SUPPLY.

Ensure that only the correct mains voltage is applied, as marked on the module.

NEVER OPERATE OR OPEN THIS SPEAKER IN DAMP OR WET CONDITIONS AND

NEVER ALLOW IT TO BE USED OUTSIDE. 

ENSURE THAT ALL POWER AND SIGNAL CABLES ARE IN PERFECT CONDITION AND

ARE CORRECTLY FUSED.

IF IN DOUBT, CONTACT HHB IMMEDIATELY BEFORE PROCEEDING.

Содержание Circle 5A

Страница 1: ...ean sharp image where as the default around 60lpi may give a dark image to pictures WARNING DANGER OF ELECTRICAL SHOCK Opening mains operated equipment like the HHB Circle5A incurs a risk of electric...

Страница 2: ...Version 1d 01 99 Page...

Страница 3: ...ement notes on testing Page 4 Opening the Circle5A Page 5 Circuit diagram active filters Page 6 Circuit diagram power stage Page 7 Circuit diagram mains input Page 8 PCB silk screen top view Page 9 Pa...

Страница 4: ...wo input connectors a master input an isolated XLR following the nor mal European wiring convention Pin 1 shield ground Pin 2 Live hot signal Pin 3 Cold return signal Also provided is a secondary inpu...

Страница 5: ...cross head screwdriver of the Superscrew or Pozidrive NOT Phillips type The Superscrew type has 4 thin grooves into which the Superscrew screw driver securely locates If the Phillips type is used the...

Страница 6: ...speaker is powered and awaiting a signal is the illuminated power on LED fixed in the tweeter face plate The power on LED is driven from the rectified unregulated transformer secondary and is a positi...

Страница 7: ...Photograph of the amp module viewed from the inside Version 1d 01 99 Page 7...

Страница 8: ...ld of the mute relay was introduced shortly after production commenced This involves the changing of resistor R46 initially fitted as 100kR to 200k or 220kR It is not practical or necessary to remove...

Страница 9: ...he arms of the preset s X is pointing to 5 c clock fully clockwise Turning this arm anticlockwise until it points to 1 o clock i e nearly half way anti clock wise reduces the tweeter level by 1dB turn...

Страница 10: ...Version 1d 01 99 Page 10...

Страница 11: ...Connections to the Circuit board Version 1d 01 99 Page 11...

Страница 12: ...Version 1d 01 99 Page 8...

Страница 13: ...Version 1d 01 99 Page...

Страница 14: ...Version 1d 01 99 Page...

Страница 15: ...V Elko C20 68 pF Keramik C21 100 nF Folie C22 100 nF Folie C23 470 nF Folie C24 68 pF Keramik C25 47 uF 50V ELKO C26 47 uF 50V ELKO C27 47 uF 50V ELKO C28 100 nF Folie C29 68 pF Keramik C30 47 uF 50V...

Страница 16: ...4 mm Cinchbuchse Monacor T 706G Kabelsatz Kaltger te Poti XLR Lackierung Platte K hlk B gel K hlk rper SK 81 300 AL Isolierfolie 25 x 50mm keraterm Trafo 120VA 2x25V Netzanschl 6762B Heil Sicherung 1...

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