BackFrom Beosound to High-Fidelity.
Optimize your Beocenter 2300/2500 with high Quality components..
Modifications should only be carried out by qualified personnel.
This section illustrates, how to upgrade your Beocenter 2300 for optimum sound performance by removal of no less than 16 pcs electrolytic capacitors in the audio signal path, and replacing standard op-amps with high performance types.
The modifications results in a more crisp and deep bass response, and much better resolution in the mid and treble range.
The modifications are carried out on the new model of BC2300 from about 1996. Modifications fits also on the earlier version of BC2300, but only with the changes on the mainboard (PCB2), which also has most importance for the sound improvements.
New or old models can be viewed from outside of BC 2300 on the CD player. The old model has a 1/4 circular laser diode guide, and the new has a linear guide.
Disassembly of the Beocenter 2300/2500.
Removal of the glass doors.
Remove the mains plug when the glass doors are in open posistion.
Carrefully pull the glassdoors out from Beocenter with both hands on the center of the door.
Removal of rear part.
Unscrew 7 pcs torx 10 in the rearpart and remove the rearcover.
There are now access to replace the IC4, IC5, IC6, IC7, IC8, and IC10 on PCB 2 according to the partslist shown below.
Removal of front panels.
Pull the panels out from the top corners.
There are access to replace IC3, IC4, C20 and C21 on PCB 89, on the right hand pcb with Beocenter in front of you.
Removal of mainboard (PCB2) from the chassis.
Unscrew the screws marked A.
Pull the pcb backwards and place the it on the table.
Loosen the 4 lock clips which secure the tuner module and lift it out.
There are now access to replace the C23 to C74 on the Mainboard (PCB2).
Click here to view disassembly
Start BC 2300/2500 modifications.
At the factory the components are glued to PCB before soldering, so a hot air solder station is recommended to remove the IC`s. The temperature should not exceed 375°C to avoid damage to the PCB tracks and components. Leaded components (capacitors) are removed with use of solder wick, also the pads for IC`s are cleaned up with the solder wick before new opamps are mounted. Use a temperature comtrolled solder iron with temparature of max 280°C.
Components which have to be changed, are all marked with a X on the photos.
Parts list for modification Beocenter 2300/2500
8 Pcs. Burr-Brown. OPA 2134UA.
IC4,IC5,IC7, IC6, IC8, IC10 (pcb 2) IC3, IC4 (pcb 89)
16 pcs. 0,6mm copper wire for bypassing capacitors. (leads from resistors)
14 capacitors on pcb2 and 2 capacitors on pcb89.
Click here to visit Farnell.com
| Beocenter CD interface new model(Pcb 89). Replace IC3, IC4 with OPA2134UA. Replace C20, C21 with 0,6mm copper wire. Note. This is not valid for the old model. |
| Beocenter Mainboard changes (Pcb 2) fits old and new
models. Remove IC4,IC5 IC6,IC7,IC8,IC10. Replace with OPA 2134UA. Remove C32, C33, C39, C40, C41, C42, C47, C57, C59, C60, C61, C64, C73, C74 Replace with 0,6mm wire. Note. If non B&O equipment is used do not replace C47 and C64 ( DC block caps). All Beolab has build in this. Care should be taken when components are soldered, use a temperature controlled solder iron with a temperature of max 280°C for max 5 seconds. |
Click to view pcb modifications.
Reassembly of the Beocenter 2300/2500.
Check that coax cables and other wires are in right position and remount the tuner pcb in the lock clips.
Remount the PCB 2 in the chassis and tighten the 5 screws marked A.
Test the Beocenter at this stage, before remounting of rear cover, front panels and glass doors.
No responsibility is taken for damage to the Beocenter.
Comments or questions to this page e-mail to jnj@adr.dk
Components are available on request.
END.