PianoTechEnglisch1_33

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Bsendorfer Computerflgel CEUS Techn. HandbookFritz LachnitV 1.33 Jan. 2009

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Prepare the Bsendorfer CEUS for piano service:

It is recommended to read the CEUS Manual before you start.

Before each work turn off power and disconnect plug from wall socket. Never pull outKeyboard with power on. Caution with metallic articles, metal chips or metal dust.Voicing hooks must be isolate, do not polish strings with steel wool

After servicing the piano, CEUS should be calibrated.

C E U S T O O L S

Phillips Screwdriver PH 1x80

Open end wrenches 5 mm5,5 mm

Hex socket driver 3,2 mm

Isolated hook Similar to the one you usefor voicing but isolated(with shrink tube orsimilar material).


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D I S M O U N T H A M M E R S E N S O R R A I L

Just disconnect the connections between Mechanikprint to Sensorprint and Bassprint to1. Diskantprint (see pic).Unlock the connector: pull out the little black bars left and right on the connector (see

pics) Pull out the white ribbon cable carefully.Att: Before pushing back in the ribbon cable be shure the little black bars left and rightare pulled out. Hold them on out position during pushing in. Otherwise it is nearlyunpossible to push in the cable

Connector enlarged:

Open closed


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Page 4

Unscrew the leaf springs

hang out the Sensor rail (pic) .

M O U N T T H E R A I L / C H E C K T H E A D J U S T M E N T S :

Hang in the sensor rail. Screw on the leaf springs


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Check the flags.Best way is to move a batch of hammers upwards with a wooden strip (as traveling thehammers) Flags should go free trough middle of every sensor. May not tough the sensorin any way. (see pic)

Connect the white ribbon cable.

Att:Before pushing back in, be sure the little black bars left and right are pulled out. Hold

them on out position during pushing in. Otherwise it is nearly impossible to push in thecable.

Be sure the cable is pushed in completely and in correct angle. Failing this, shortcutscan damage the system.

Push back in the little black bars.


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C H E C K, A D J U S T T H E F L A G S A / O S E N S O R H E I G H T

In case of regulating the action after hammer service or other reasons you should checkthe height of sensors and flags. Otherwise the reproduction of soft or silent notes can beinaccurate. The worst could be that soft calibration of hammer velocity is impossible onthe unadjusted notes.

Check: (ref to CEUS Handbook how to use the CEUS control keys)Unlock service menu

Value for keys/solenoids yes? OKHead

Hint:Displayed head number in not important. You can adjust all flags without doing anychanges.

Lift up the hammer head with an isolated hook (!!prevent shortcuts!!) slowly to the

string.Before the head touches the string you can hear a soft beep. Simultaneously the Symbol beep is off.Top edge of the slot interrupts the infrared light beam in sensor > beep again.


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A D J U S T M E N T O F F L A G S / S E N S O R S :

Height of flag:Loose hex nut M 1,6 with Hex socket driver> move the flag> screw tight carefully (see

pic)

Height of sensor rail:Loose counter nut > adjust with turning the hook 2 (see pic) > screw tight

Hook should fit exactly in the U bracket. (See pic below)Otherwise you will not reach the required position of the sensor rail.

Check space between hammer shank and sensor rail

Lift up hammer to the string check space. Should be 3mm or more.Otherwise shanks touch the rail, make strange noises and weight the recording.


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A D J U S T M E N T O F S T O P R A I L ( I M P O R T A N T F O R R E G U L A T E A F T E R T O U G H , K E Y D E P T H )

Before you start regulating the keys

Stop rail


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Pic.: Wippen rail enlarged.

Turn adjustment screwcounter clock wise.Space to top edge of keys willbe increased.

Check:Depress key full. Now checkthe space to the Stop rail. Keymay not tough the rail.Otherwise the results will beweighted during regulating. Ifok you can regulateaftertough and keydepth asusual.

After regulating dont forget to readjust the Stop rail properly for best results ofreproduction.

A D J U S T M E N T O F S T O P R A I L F O R C E U S R E P L A Y :

Depress key (forte) and hold. No space but no pressure to the stop rail.Depressed, played keys should not be bent over the balance rail in any way.

Hint: Not more than 3 turns on a single adjustment screw to prevent bending the rail.

Adjustment screw


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P E D A L S

After regulating the pedals ( damper lift, lost motion) you should check the tension ofthe pedal solenoid ropes:

Check like motorbike chain: plus minus 15mm movement from 0 at half length of rope.Check for piano tech.:Softly stretched, not hanging down but no sound like a string.

Adjustment:

Turn the plate clockwise increases the tension.Counter clockwise decreases the tension.

The counter plate is self locking.

Dont forget to calibrate the pedals and to restore the lost motion of dampers.(Ref. CEUS Manual how to get into the menu)Calibrate keypress: yes?

Calibrate lost motion of damper

Move to lost motion (press ok)

Move the pedal (by hand) to the point were the tray starts to lift up the dampers. Goahead till dampers release most of the strings. Between this two points hold the pedaland press OK. The displayed value (normally between 50 - 80) is now stored.

Counter plate


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D I S M O U N T T H E A C T I O N :

Hint:It is not necessary to dismount the hammer sensor rail for this works.

Before you take away the action unplug the two connectors carefully (see pic).

Hint: It is easier to do if you loose the screws and lift up the action on bass sidecarefully. (Put a small piece of wood under the bracket.)

After remounting the action plug in both connectors.Check also the plugs underneath the key frame that connect the key prints to the actionprint.

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PianoTechEnglisch1_33