Assemblydissassembly
NOTE These two screws MUST be replaced n the correct places. SECTION 2 CIRCUIT DESCRIPTIONS Board A-1 Each key on the keyboard has its own capacitor-resistor-diode network. The capacitors are normally charged to 15 volts until a key is depressed at which time the capacitor discharges through the diode creating a trigger pulse on the trigger bus rod. Q1 through Q4 are a monostable multivibrator which delays the trigger pulses 15 milliseconds to allow the gate and CV to stabilize. P1, the pitch...
ARP ODYSSEY2 Model 2810 2823 SCHEMATIC Board A ll
ARP ODYSSEY-2 Model 2810 - 2823 ASSEMBLY Board A ll without PPC A J.O'frs ' ' Vi fXCFPTCK4tiN 4 k 1 gt lt gt A Yuwtts '
B B B B B
1. Put the VCF RESONANCE slider at MAXIMUM. 2. Monitor pin 10 of the 4023 module with an oscilloscope. 3. Put all other sliders on the front panel DOWN. 4. Adjust the VCF FREQUENCY slider for a sine wave of about 1000 Hz. 5. Measure the peak to peak amplitude of the sine wave on pin 10. 6. Measure the peak to peak amplitude of the sine wave on pin 9 of the 4023 should be about half the amplitude of pin 10 . 7. Adjust the BAL trimmer on Board C until the sine wave on pin 9 is exactly half the...
A V V lTt15
1.4.3 TYPES OF VOLTAGE CONTROLLED FILTERS The 4023 voltage controlled filter is no longer available from the Factory. Instead, the newer 4075 filter can be used to replace the 4023 with the following modification see Field Change Notice 007 The earlier model Odyssey-lls used a 4035 voltage controlled filter, which has since then been replaced by the 4075. No modifications are necessary when replacing a 4035 filter with a 4075. The newer style Odysseys use a zener diode as a noise source instead...
ARP ODYSSEY Model 2800 SCHEMATIC Board C1
ARP ODYSSEY-2 Model 2810 - 2823 ASSEMBLY Board C-II j l2.0v S S gt 2ACV SP g ll T S TRA H POf fi4erR CoNNeCXtOU amp ROKEH H exe F OK - OA LY
