Camp's Organ Service
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Service Updates
Hammond Tone Wheel Organs
B3/C3/A100/D152/RT3 With intermittent Static, Hum, Volume Fluctuations, or Distortion
Pre B3 Organs With intermittent Static, Hum, Volume Fluctuations, or Distortion
Hammond Tone Wheel Bearings (Squealing, Noisy, Seized Up)
Hammond A100 Reverb Failure
Pre B3 Hammond Models with Ratchet Style Drawbars
Choppy Vibrato on Tone Wheel Organs
Yamaha Digital Pianos
Keys Weak, Uneven or Too Loud
Noisy Clacky Keys (Service Bulletins WJ88A-402 & WJ88B-402R1
Suzuki Digital Pianos
Sagging Slugish Keys
Kawai Digital Pianos
Hammer Breakage (Service Bulletin 102331)
Excessively Noisy Keys
Roland Digital Pianos
Sagging Slugish Keys
Excessively Noisy Keys
Conn Organs
Leslie Tone Cabinets
Keys sound intermittently, uneven or weak
Early Tone Cabinets Lacking Slow Speed
Hammond B3/C3/A100/D152/RT3 With intermittent Static,
Hum, Volume Fluctuations, or Distortion.
•Symptoms: Intermittent Static, Hum, Volume Fluctuation, Distortion, Poor Bass or Treble Response From Organ

•Cause: B3s and these related models were made from 1955 to 1975 and the components within the preamp are old and aging. As components within the preamp age,they drift in value and sometimes deteriorate causing intermittent statics, hums, poor bass or treble response, distortion, volume fluctuations, etc.

•Solution: Replace the Organ Preamp With Rebuilt Preamp (all resistors, capacitors, potentiometers and tubes replaced) or Trek II SSP-3a Solid State Preamp.

•Affected Models: B3, C3, A100, RT3

•Procedure: Replacement of aging tube preamp with a rebuilt tube preamp, all resistors, capacitors, potentiometers and tubes have been replaced, also an improved power supply for a cleaner sound has been added, and the chassis is treated to prevent the growth of zinc dendrites. The warmth of a tube preamp is retained and the original (now disconnected) capacitors are left in place for asthetics. Price includes installation at your location and a one year warranty.

•Cost for Rebuilt Preamp - Parts and Labor $1145* Exchange required. Add $75 if A100.

Cost for Trek II SSP-3a Solid State Preamp - Parts and Labor $1090.
Add $150 if A100.
Hammond Pre-B3 models With intermittent Static,
Hum, Volume Fluctuations, or Distortion
•Symptoms: Intermittent Static, Hum, Volume Fluctuation, Distortion, Poor Bass or Treble Response From Organ

•Cause: These early model Hammonds were made from 1935 to 1955 and the components within the preamp are old and aging. As components within the preamp age,they drift in value and sometimes deteriorate causing intermittent statics, hums, poor bass or treble response, distortion, volume fluctuations, etc.

•Solution: Replace the Organ Preamp With SSP-3 Solid State Preamp

•Affected Models: A, AB, B, BC, BV, B2, C, C2, CV, RT2, etc.

•Procedure: Replacement of aging tube preamp with Trek II Solid State Preamp carefully designed to faithfully reproduce the response of the original tube pre-amp when it was new. Price includes installation at your location and a one year warranty.

•Cost: Parts and Labor $1095*
Hammond Tone Wheel Bearings (Squealing, Noisy, Seized Up)
•Symptoms: Noisy, squealing bearings or organ won't start because bearings have seized up.

•Cause: Organ has not been oiled for many years or oil is not reaching some bearings.

•Solution: By the time bearings start to squeal or seize, regular oiling procedures are inadequate. The bearings must be oiled directly.

•Affected Models: All Hammond Tone Wheel Models (Model #s starting with letters A,B,C,D,E,G,H,L,M,R,T,X)

•Procedure: Access bottom of tone wheel generator and oil each bearing directly, then apply Hammond oil generously through oiling funnels.

•Cost: Usually our minimum charge plus the cost of oil covers this repair. Occasionaly more is needed.
Hammond A100 Reverb Failure
•Symptoms: Reverb No Longer Works or is Staticy

•Cause: Either the Reverb Spring Delay or the Reverb Amp or Both Have Failed

•Solution: Some Parts for the A100 Reverb System Are No Longer Available or Difficult to Find. The Cost of Repairing the Reverb is About the Same As Installing a New Trek II Reverk Kit, So the Best Solution is the Much Better Sounding Reverb of Trek II.

•Procedure: Remove or Disconnect Old Reverb Spring Delay and Amp. Install Trek II Reverb. All Work Done at Your Location.

•Cost: Parts and Labor $585*
Pre B3 Hammond Models with Ratchet Style Drawbars
•Comment: Even Though Not a Malfunction, This Annoying Condition Can Be Addressed.

•Symptoms: The Ratchet Style Drawbars Are Difficult to Position, and Have Tone Dropouts in Between Drawbar Settings.

•Cause: That's the Way They Made Them Back Then.

•Solution: Install Smooth Drawbars Conversion. This Kit Replaces the Old Style Ratchety Drawbars With a New Drawbar Assembly Specifically Designed to Address This Deficiency. No More Ratcheting and No More Tone Drop-Outs between Drawbar Settings. Your Drawbars Will Operate As Smoothly or Even Smoother Than Those on Later Model B3s,C3s,and A100s.

•Procedure: Remove Old Drawbar Assembly and Install New Smooth Drawbar Assembly.

•Cost: Parts and Labor $1095.00* Exchange Required
Choppy Vibrato on Tone Wheel Hammond Organs
•Symptoms: Choppy Sounding Vibrato on A, B, C, D, E, G, R and T series Organs

•Cause: The Vibrato Scanner is plated with zinc which has a tendancy to grow crystalline whiskers called dentrites. The dendrites short the scanner's terminals to ground.


•Solution: Replace the Scanner with a rebuilt scanner.

•Procedure: Our rebuilt Scanners have been completely disassmbled, cleaned and lubricated, removing all dendrites. We then seal the scanner chassis to retard the growth of dendrites.

•Cost: $285* - Exchange Required
Early Leslie Tone Cabinets With Fast and Off Speed
(No Slow Speed)
By Benton Electronics - Converts older single speed Leslie’s to 2-speed using original motors. It Replaces both the old mechanical relay and provides fast and slow speed operation. Optionally adds brake function. Uses state-of-the-art Industry Standard Motor Drive Technology, thus avoiding problems such as low torque, motor heat and growling noise with slow speed. Can even work on 2-speed models eliminating the slow motors and the tedious adjustments and wear. Single Speed Leslies include models 21H, 22, 22H, 22R, 31H, 44W, 45, 46, 47, 51.
Leslie Brake Function
The MTC Logic Motor Controller, when combined with a 3 position tremolo switch, will provide FAST, SLOW and OFF to any Leslie in the 122 and 147 families.
More Info From Benton Electronics
Conn Organs - Keys Sound Intermittently, Uneven or Weak
•Models Affected: Many of the 600 & 700 series models

•Symptoms: Keys are uneven in volume. Some may be weak, dead or intermittent.

•Cause: Copper wiring inside vinyl coated bussbars has oxidized causing poor electrical connection.

•Solution: Replace vinyl bussbars with gold plated type as per factory instructions.

•Procedure: Replace all vinyl bussbars with gold plated type and clean keyswitches.

•Cost: Depends on model, current price of bussbars and location. Call for price.
Yamaha Digital Piano - Sluggish, Sticking or Sagging Keys
•Symptoms: Keys sag or are sticking or sluggish, etc.

•Cause: The Keys break or crack at the rear pivot point of the key, typically lean a little to the left, then won't move up and down freely.

•Solution: Replace keys showing symptoms described above with new reinforced keys. In situations where there is recurring key breakage, purchase of a new keyboard assembly, one having all reinforced keys, may be considered.

•Affected Models: This problem is often present on the following models although this is not a complete list of all models affected : CLP110, CLP115, CLP120, CLP130, CLP150, CLP170, CLP175, CLP220, CLP230, CLP240, CLP270, CLP280, CLP910, CLP920, CLP930, CLP950, CLP955, CLP970, CLP990, CVP103, CVP105, CVP107, CVP109, CVP201, CVP202, CVP203, CVP204, CVP205, CVP206, CVP207, CVP208, CVP209, CVP210, CVP600, CVP700, P60, P80, P120, PF500, PF1000, and many YDP models.

•Cost: On most models the cost of key replacement is covered by our minimum service call charge plus the cost of $18.00 per key, or plus the cost of a keyboard assembly (between $700 to $800).
Yamaha Digital Piano - Exessively Noisy Keys
•Symptoms: When keys are played they are clunky and noisy

•Cause: Over time the Key felts compress and degrade allowing the hammers to noisily hit the keyboard chassis.

•Solution: Replace Key felt pads restoring sound level and operation of keys to new condition

•Affected Models: Many CLP, CVP, P, and YDP series models.

•Cost: $230*
Suzuki Digital Piano - Sagging Keys, Sluggish Keys, Sticking Keys
•Symptoms: Keys sag or are sticking or sluggish, etc.

•Cause: The weighted hammers in the keyboard action hang up on the pivot rod that runs internally through the length of the keyboard.

•Solution: Suzuki now supplies a kit that replaces the pivot rod and lubrication grease. When installed, this kit completely and permanently cures the problem.

•Affected Models: DG401, DG502, DP77, DP700, DP1000, FP-S, GP-3, GP-7, HG275e, HG400, HG425e, HG435ex, HG450ex, HG500ex, HG550ex, HP7, HP8, HP75, HP80, HP85, HP97, HP99, HP100, HP105, HP255e, HP275e, HP300ex, HP425e, HP550ex, M22, MDG100, R21, S350, SC10, SD10, SS100, ST-7, TSI, VG17, VP1000. This is not a complete list of models with the pivot rod problem. If your model was manufactured between 2002 and 2012 and has "Made in China" on the serial number tag, then it has the pivot rod problem.

•Requirements: None

•Procedure: This modification takes about 1 ½ hours to do and can be done in your home. The modification frees up the movement of the keys and hammers, giving the keyboard a slightly faster action. The noise level of the keys is slightly increased.

•Cost: $395.00* for most models, $545* for pianos with Auto Player
Kawai Digital Pianos - Keys Weak, uneven or Too Loud
•Models Affected: CA330, CA500, CA600, CA800, MR270, MR370, MR3000

•Symptoms: Keys are uneven in volume and dynamics. Some may be weak or ring out too loudly.

•Cause: Rubber contact keyswitches are worn out.

•Solution: Original rubber contact keyswitches are no longer available; however, Kawai supplies a newer type of keyswitch assemblies to replace the old.

•Procedure: Remove old keyswitch assemblies, make a simple modification to the keyboard chassis and install newer type keyboard assemblies.

•Cost: Parts and Labor $545.00*
Kawai Digital Pianos - Noisy Clacky Keys - There are three
different problems that can cause this symptom
•Problem #1: Excessive travel of hammers causing noisy clacky keys
•Service Bulletin WJ88A-402
•Models Affected: CA950, CP150, CP170, CP190, MP9000
•Solution: Install Z bracket underneath hammer supports to prevent excessive travel.
•Cost: Parts and Labor $375.00

•Problem #2: Hammer Cushion Deterioration
•Service Bulletin WJ88B-402R1
•Models Affected: CA970, CP150, CP170, CP200, MP9000
•Solution: Install new hammer cushions on all keys.
•Cost: Parts and Labor $205.00*

•Problem #3: Warping or Sagging of Keybed
•Service Bulletin RA88A-401R
•Models Affected: CN370, CN470, CP110, PN100, PN300
•Solution: Install angle iron brace under keybed. Install rib caps on keyboard assembly. Replace hammer rest cushion. Replace keyslips as needed.
•Cost: Parts and Labor $425.00*
Roland Digital Piano - Hammer Breakage (Service Bulletin 102331)
•Symptoms: Keys sag, won't play, make noise, etc.

•Cause: Weighted Hammers Beneath Keys Break - The plastic stem holding the lead weight cracks and breaks after prolonged use.

•Solution: Replace All Hammers With Newly Designed Hammers of Greatly Increased Durability

•Affected Models: A-90, A-90EX, FP-1, FP-8, FP-9, HP-145, HP-147, HP-236, HP-237, HP-237E, HP-245, HP-2800, HP-2800G, HP-2880, HP-330, HP-330E, HP-335, HP-3800, HP-3800G, HP-530, HP-530E, HP-535, HP-550G, HP-555G, HP-5700, HP-730, HP-7700, KR-1070, KR-370, KR-375, KR-4300, KR-570, KR-570W, KR-575, KR-575P, KR-770, RD-500, RD-600, XV-88

•Cost: Roland Provides Hammer Set at Greatly Discounted Price. With Parts & Labor Cost Is $585.00*
Roland Digital Piano - Broken Sub-chassis, Compressed Felts
•Symptoms: Excessively Noisy Keys

•Cause: On models using the PA-5 keyboard assembly, as felts compress, the hammers travel too far breaking various sub-chassis and other related parts

•Solution: Replace felts and broken sub-chassis parts. Complete disassembly of keyboard is necessary. While we're in there we lubricate all pivot points too.

•Affected Models: DP-1000D, DP-900, F-100, F-100-BK, F-90, F-90-BK, FANTOM-S88, FANTOM-X8, FP-3, FP-5, HP103D-LC, HP103D-MH, HP103-MH, HP103-PE, HP107D-LC, HP107D-MH, HP107-LC, HP107-MH, HP-147R, HP-147RD, HP-147RE, HP-237LE, HP-237PE, HP-237R, HP-237RD, HP-237RE, HP-237RPE, HP-2D-MH, HP-2-MH, HP-2-PE, HP-337, HP-337D, HP-337E, HP-337R, HP-337RD, HP-557R, HP-557RD, HP-557RS, HP-7D-MH, HP-7-MH, HP-7SD-LC, HP-7SD-MH, HPI-5, HPI-5A, HPI-5AD, HPI-5D, HPI-5D-LC, HPI-5-LC, HPI-7D-LC, HPI-7D-MH, HPI-7-MH, KF-7, KF-90, KR-1077, KR-1077M, KR-1077M-I, KR-15M-PE, KR-15M-PM, KR-15-PE, KR-15-PM, KR-17M-PE, KR-277, KR-277D, KR-377, KR-377D, KR-577, KR-577D, KR-577P, KR-577PD, KR-577S, KR-5D-MH, KR-5D-MP, KR-5-MH, KR-5-PE, KR-7D-MH, KR-7IRD-MH, KR-7-MH, KR-7-PM, KR-977, KR-977-MH, MP-300, MP-500-BW, PT-2700, PT-3100, RD-700, RD-700SX

•Cost: $395*
*This price may be higher in some areas depending on location and is subject to change without notice.
More Info From Trek II about the Rebuilt Preamp Option
More Info From Trek II about the SSP-3a Solid State Preamp
More Info From Trek II about the SSP-3a Solid State Preamp
More Info From Trek II about the RV-1D Reverb