Gut, sehr gut! It helps me much! I couldn't find this schema nowhere. Good quality
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BP25 PREAMP MAIN SCHEMATIC
Rev 1.5e 17 Aug 2000 WP Rev 1.61 26 Sept 01 WP IR receiver replaced with 20N cap in RC reveiver (45027) repalced with 22n updated part RPM6938 (Rohm) and the 49K9 in parallel with Rev 1.6 09 Aug 2001 ST it is chg'd to 45K3. Two HEADPHONE MUTE WIRING 1000u/50v caps on output of 8v regulator replaced with SHOWN single 2200u/35v cap.
Rev 1.6A 15 APRIL O2 ST ADD 1MEG TO + BUFFER INPUT Rev 1.7 1 Aug 03 WP Corrected dwg error to gnd'ng at sel.sw. inputs