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Wednesday, May 24, 2000
Rhodes Service Manual
Page: 1
RHODES Keyboard Instruments U.S.A.
Post Office Box 4137 1300 East Valencia
Fullerton, California 92634
(714) 879-8080
Copyright © 1979 CBS Musical Instruments A Division of CBS Inc.
P/N 34.0119.000 Printed in U.S.A.
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- Page 1 Wednesday, May 24, 2000 Rhodes Service Manual Page: 1 RHODES Keyboard Instruments U.S.A. Post Office Box 4137 1300 East Valencia Fullerton, California 92634 (714) 879-8080 Copyright © 1979 CBS Musical Instruments A Division of CBS Inc. P/N 34.0119.000 Printed in U.S.A. Frames (800 X 600) No Frames (640 x 480) Rhodes Help Desk...
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Page 2: Table Of Contents
Full-Skirt Type Key Cap One- And Two-Piece Type Key Cap Section II Early Design RHODES Piano Chapter 7 Early Design RHODES Piano - Tone Source (Prior to July 1975) The Tine Chapter 8 Early Design RHODES Pianos - Action (Prior to September 1975) - Page 3 Connection Diagram - All Printed Circuit Boards - Instructor Console 11-23 11-19 Schematic - Preamplifier and Power Amplifier - Student Piano (First Version - 1968) 11-24 11-20 Schematic - Preamplifier and Power Amplifier - Instructor Piano (First Version - 1968) 11-25 file:///Macintosh%20HD/Desktop%20Folder/Fender%20Rhodes%20Manual%20%C4/toc.html...
- Page 4 FOREWORD Since its inception in 1965, the RHODES Piano has remained relatively constant in terms of design concept. However, there have been changes in the methods of achieving those design concepts. Those concepts which have remained constant throughout the history of the RHODES are: 1.
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Page 5: Chapter 1 The Rhodes Tone Source
By this means, then, it is possible to arrive at a fine tuning merely by sliding the Spring to the desired spot on the Tine. See Tuning Your RHODES Piano, Page 5-1. The Tines in your RHODES Piano, like the strings of a guitar, are subject to breakage under stress. We here at the factory are constantly on the alert for ways to achieve the longest possible life in these as well as in all other component parts of your Piano. -
Page 6: Chapter 2 The Rhodes Modular Action
2. SUITCASE PIANO ONLY: In its rest position, the bottom surface of the Push Rod should be reasonably flush with the outer surface of the bottom of the Piano. There is a slot on the top surface of the Sustain Rod providing screwdriver adjustment on the top of the Amplifier Enclosure. -
Page 7: Damper Module
Wednesday, May 24, 2000 Chapter Two: The Rhodes Modular Action Page: 2 ACTION RAIL With the Damper Release Bar and the Damper Modules removed, the new Action Rail (Figure 2-1, 29) is revealed to be a sturdy, extremely accurate aluminum extrusion. HARP SUPPORTS The new Harp Supports (Figure... -
Page 8: Chapter 3 Instructions For Disassembly
Wednesday, May 24, 2000 Chapter Three: Instructions for Disassembly Page: 1 CHAPTER THREE INSTRUCTIONS FOR DISASSEMBLY Access to the specific areas for needed adjustments or repair is easily accomplished by following the procedures outlined here. 1. Harp Cover Removal The Cover is formed of A. B. S. material and is practically impervious to damage. To remove, lift up on the two back corners of the molded top. With this done, simply pull the front edge free. -
Page 9: Stage Piano
Suitcase Piano Proceed as with a Stage Piano, again observing the CAUTION on the previous page, following Steps a, b, and c. In addition, since the bottom surface on the Suitcase Piano is of a thinner plywood than the Stage Piano, the four Glides (Figure 3-3, 1) must be removed as well. -
Page 10: Dimensional Standards And Adjustments
CHAPTER FOUR DIMENSIONAL STANDARDS AND ADJUSTMENTS This chapter deals with the important dimensional standards for maximum performance of your RHODES Piano and adjustments available to maintain that performance. 1. Key Dip. The distance of downward travel of the Key Front (Figure 4-1, 1) is called "Key Dip."... -
Page 11: Damper Clearance
Wednesday, May 24, 2000 Chapter Four: Dimensional Standards and Adjustments Page: 2 Figure 4-3. Escapement Adjustment Locations a. Each of the Tone Bar Assemblies is separated from the Tone Bar Rail by two adjustable coil Springs. By means of these, the height of each Tone Bar Assembly can be raised to 1/2"... -
Page 12: Re-Establishing Striking Line
By Dynamic Response is meant "percentage of volume increase in response to increased weight of touch." In Pianos built since March 1972, a gap of 0.020" (0.5080mm) can be accommodated in the middle and upper ranges. NOTE When Timbre and Volume Adjustments are made, Pitch should be re-established. See TUNING THE RHODES PIANO, Page 5-1. - 4 - file:///Macintosh%20HD/Desktop%20Folder/Fender%20Rhodes%20Manual%20%C4/ch4.html... -
Page 13: Chapter 5 Tuning The Rhodes Piano
TUNING THE RHODES PIANO Generally speaking it can be said that the Piano will not "go out of tune". Certainly it does not go generally out of tune over the entire Keyboard as does the traditional string piano. What may happen is that one or more notes may go out of tune because of a loose Tuning Spring or as a result of Tine fatigue under the stress of constant heavy blows. Under these conditions tuning simply requires pitch comparison with the tone an octave below and shifting of the Tuning Spring until pitch alignment is achieved. -
Page 14: How To Follow The Chart
The next note, D#, is one and one-half Cents flat. D, C4, C, B, A and G# are all two Cents flat, etc. Continue observing the schedule shown on the Chart until you reach the lowest note on the Piano. Upon completion of this, you will have Stretch Tuned the Piano in accordance with the best tuning tradition. Now, treat yourself to a performance and enjoy the rare brilliance that only Stretch Tuning can achieve. -
Page 15: Timbre Adjustment
(Figure 6-1) using the 5/16" (7.938mm) wrench. Figure 6-1. Tone Generator Removal/Replacement 3. Remove the four Screws which secure the Piano Harp Frame to The Harp Supports (Figure 4-7) and stand the Harp vertically on its edge. 4. Consult the cutting chart (Figure 6-2) in the Tone Generator Assembly Replacement Kit and cut the Tine to length with a pair of sharp side cutters. -
Page 16: Key Pedestal Modification Procedure
1. Remove Action Rail by following procedures outlined on Page 3-4. Maintain Hammer Assemblies in their mounted position. 2. Locate Action Rail on bench well away from other parts of the Piano and other equipment that may be harmed by the chemicals to be used. - Page 17 Wednesday, May 24, 2000 Chapter Six: Repair Procedures and Techniques Page: 3 3. Place the Action Rail with Hammers and Dampers intact up-side-down to allow for easy access to the Felt on the Hammer Butt. 4. Saturate each Felt with Silicon Spray two or three times allowing 10 minutes soaking interval between each saturation application. 5.
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Page 18: Worn Key Bushing Repair Procedure
The third technique is to replace the bushings. With a sharp knife, carefully trim away the worn bushings. Then apply a white glue to each side of the bushing slot. Install new felt (obtainable from any piano supply house) and clamp the felt in place with a key bushing wedge, or clamp. -
Page 19: Key Identification Chart
The Key is now ready to be replaced in the Piano. 1. Heating the plastic Cap with a heat gun will soften the plastic to allow easier removal. 2. Spring clamps and plates for the tops and fronts are available from piano supply companies. - 6 -... -
Page 20: Escapement Distances
1. In the original Piano, the Tone Bar Assembly (tuning fork) was a single piece of cast iron which was suspended in a metal channel. The bottom leg was a length of piano wire of a diameter of .075" (1.905mm) (Figure 7-1). -
Page 21: Rhodes Second Stage Tine Design
Wednesday, May 24, 2000 Chapter Seven: Early Design Rhodes Pianos - Tone Source Page: 2 Figure 7-5. RHODES Second Stage Tine Design This taper was accomplished by the "centerless grinding process". This new configuration added considerable life expectancy to the Tine. As a result of some six years of developmental procedure, a major breakthrough was accomplished in the processing of these new tapered Tines. -
Page 22: Chapter 8 Early Design Rhodes Pianos - Action (Prior To September 1975)
Wednesday, May 24, 2000 Chapter Eight: Early Design Rhodes Pianos - Action Page: 1 CHAPTER EIGHT EARLY DESIGN RHODES PIANOS - ACTION (Prior to September 1975) Fundamentally, there has been no deviation from the original design principle, though the actual configuration of the parts has changed. THE ACTION The original Hammer Assembly appeared as shown in Figure... -
Page 23: Chapter 9 Early Design Rhodes Pianos - Maintenance And Rejuvenation
Figure 9-2. Tear-Drop Hammer Head - Reshaping to Striking Line b. Next, test Felt hardness by playing the Piano through the mid-range. If the tone quality is harsh, indicating excessive hardness of Hammers, the Felts can be softened by the "Voicing"... -
Page 24: Rhodes Hammer - Shim Placement
This applies whether the Key is as shown in Figure 8-1 Figure 8-2. 2. Suppose you have a Piano of the vintage depicted in Figure 8-4 but with the type Tone Bars as shown in Figure 7-2, and you wish to restore it. Proceed as follows: a. - Page 25 Wednesday, May 24, 2000 Chapter Nine: Early Design Rhodes Pianos - Maintenance Page: 3 1. Tines 6. Pickup Arms 11 & 12. Tone Bar Adjustment Screws 2. Dampers 7. Pickup Mounting Screws 13. Balance Rail Guide Pins 3. Harp Hinge 8.
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Page 26: Chapter 10 Early Design Rhodes Pianos - Dimensional Standards And Adjustments
Key will cause the Hammer to smother the sound. Now back off a bit. Raise the Escapement to the point where the Hammer can no longer smother the sound. This becomes the ideal setting. To achieve the ideal Escapement setting, there are several adjustments possible depending upon the vintage Piano involved. a. To decrease the Escapement distance, compress both Escapement Adjusting Springs (Figure 4-4). -
Page 27: Signal Strength
Wednesday, May 24, 2000 Chapter Ten: Early Design - Standards & Adjustments Page: 2 Figure 10-2. RHODES Early Design Harp/Action Assembly - Exploded View 2. Using a table saw, shave off the desired amount from the top surface of each Block, approximately 1/16" (11.588mm) to 1/8" (3.175mm). 3. -
Page 28: Chapter 11 Diagrams, Schematics And Pictorials
11-17: Schematic - Preamplifier and Power Amplifier (Jordan Design) -Suitcase Piano (Pre 1969) 11-18: Connection Diagram - All Printed Circuit Boards - Instructor Console 11-19: Schematic - Preamplifier and Power Amplifier - Student Piano (First Version - 1968) 11-20: Schematic - Preamplifier and Power Amplifier - Instructor Piano (First Version - 1968)
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