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Paia 9720, Инструкция по сборке и использованию

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Paia 9720 Скачать руководство пользователя страница 13

9720 VCO      13

010321

Now we’ll continue wiring of the front panel parts as shown in fig 3. First,
notice that individual solder lugs are identified by part number and lug number.
For example, R200-1 means the lug labeled “1” of the Potentiometer R200.

Also, this convention will be followed in these steps: Do not solder a connec-
tion to a lug until told to do so with an instruction such as (s2), which means
that at that point there will be two wires on the lug in question.  If there are not
the number of wires specified at the lug when you get ready to solder, recheck
to see what has gone wrong.  Connections which should not be soldered yet
will be marked (ns) for NO SOLDER. On these unsoldered connections simply
push the end of the wire through the lug and crimp it back to mechanically
secure it.

(  ) Connect the free end of the solid wire extending beyond J11-S to

R203-1 (ns).

(  ) Cut a 3-3/4" length of bare wire and pass it through the holes

in the "S" lugs of J1 and J9. DO NOT SOLDER these two
connections. Bend the  "S" lugs of J2-J8 up to meet the wire
and solder these seven connections.

In the following steps cut a piece of bare wire to the length indicated and
use it to connect the component lugs specified. Route the wires as shown
in Fig 3 and push them down close to the front panel so they will not short
against the lugs of switches and jacks and future wiring. The "clipping"
length means that a resistor or capacitor lead clipped earlier should be used.

LENGTH

FROM

TO

(  ) clipping

R201-2 (s1)

R201-3 (ns)

(  ) clipping

R200-2 (s1)

R200-3 (ns)

(  ) clipping

R205-2 (s1)

R205-3 (ns)

(  ) 3-1/4"

S2-1 (s1)

R204-1 (ns)

(  ) 2"

R204-1 (ns)

R202-1 (ns)

(  ) 3/4"

R206-1 (ns)

J10-S (ns)

(  ) 3/4"

J7-X (ns)

S1-2 (ns)

Many point-to-point panel connections are made using the

Содержание 9720

Страница 1: ...tch over a 3 octave range The Sync input provides for Soft Synchronization to an external audio source Oscillator B is very similar to Osc A but subtle differences optimize the flexibility of the pair...

Страница 2: ...silly and ritualistic but it greatly decreases the chance of omitting a step and also provides some gratification and reward as each step is completed Numbered figures are printed in the Illustration...

Страница 3: ...ver the soldering pad and about 1 16 inch of lead passing through it There are two improper connections to beware of Using too little solder will sometimes result in a connection which appears to be s...

Страница 4: ...in later steps The 9720 VCO uses 1 film resistors in precision circuitry and 5 carbon film resistors in non critical locations Not all resistors are mounted on the circuit board some will be left ove...

Страница 5: ...brown R24 R46 R50 R88 listed below 2200 red red red R13 R15 R22 R32 R65 R74 R83 R84 R100 220k red red yellow R102 220k red red yellow R106 220k red red yellow R25 2400 red yellow red R52 2400 red yell...

Страница 6: ...mic Disk capacitors are already parallel to each other but still may need to be bent slightly to match the spacing of the circuit board holes The leads of the Polystyrene capacitors will need to bend...

Страница 7: ...capacitors are polarized and the leads are not interchangeable Leads are marked and or and the lead must go through the hole in the circuit board Frequently the positive lead of the capacitor is sign...

Страница 8: ...hem in the circuit board Note that the transistors are polarized by the flat side of the case When the transistors are properly installed this flat will align with the corresponding mark on the circui...

Страница 9: ...before assembly or if you do touch a lamp or something to make sure you re discharged Don t be intimidated It s rare for parts to be damaged this way ICs are polarized in one or both of two ways A do...

Страница 10: ...is flat will align with the corresponding flat in the LED symbol printed on the circuit board When the 9730 is installed behind its front panel the LED will engage the holes in the front panel and be...

Страница 11: ...but this time be critical It would be a good time to double check the orientation of polarized parts and that the right resistors and capacitors are in the right places Examine the solder joints On t...

Страница 12: ...ing the S lugs of J12 J16 to the wire by bending them up until they touch the wire then soldering the two together DO NOT SOLDER the connection at J18 Using the flat washers and nuts supplied mount th...

Страница 13: ...nd crimp it back to mechanically secure it Connect the free end of the solid wire extending beyond J11 S to R203 1 ns Cut a 3 3 4 length of bare wire and pass it through the holes in the S lugs of J1...

Страница 14: ...lied and slip one over each resistor lead Trim the leads so that 1 4 extends beyond the sleeving Use this part as R207 to make the connection from R200 1 s1 to R201 1 ns Similarly insulate the leads o...

Страница 15: ...t engages the hole provided for it in the front panel as shown in fig 2 Attach the circuit board to the front panel by passing 4 40 X 1 4 Machine Screws through the panel from the front and into the t...

Страница 16: ...more solder Allow the joint to cool and test it by wiggling the wire to make sure the joint is firm Do not wrap the wings of the pin around the wire Slide the power pins into the connector body Note...

Страница 17: ...about something else for a while When you come back take the time to do a final check The flying wires to the panel aren t bundled with wire ties yet and we ll leave them that way for now so move them...

Страница 18: ...different half or twice more for instance it may indicate an incorrect component value or power supply lines that are out of spec check for hot parts among the power supply components mentioned in ste...

Страница 19: ...ator out to OscA PW input and listen to observe PWM effect Notice that the output is silent for a part of each cycle when the Output control is CW beyond the 12 o clock position Problems with these te...

Страница 20: ...ustration With 4V output from the controller adjust OscB pitch for 2 octaves above OscA then with 0V output adjust Scale B trimmer R52 for a pitch 2 octaves below OscA Iterate this procedure until sat...

Страница 21: ...a second reading more things will make sense and on a third even more Be sensitive to how different sections of ICs are used For example notice that both the OscA Ramp and OscB Pulse outputs use secti...

Страница 22: ...s that define ramp triangle and pulse waveforms OscB Pitch CV Input 1 The arrow indicates that this input is normalized to the output of the glide processor and consequently OscA P1 Inserting a plug i...

Страница 23: ...he output high Periodic Trigger pulses hard sync the LFO Output Amplitude of the Control Voltage from this output is set by the Output control The arrow indicates that the Modulator Output is normaliz...

Страница 24: ...shaper that has opamp IC8 B as it s active element As the ramp increases toward ground from its minimum of 6 5V diodes D15 and D16 are both reverse biased and the opamp acts as a unity gain inverter...

Страница 25: ...of that voltage Taking OscA as typical the voltage across the b e junction of Q3 produces a collector current that is exponentially related to voltage increases When properly calibrated collector cur...

Страница 26: ...hich couples to the buffered timing capacitor voltage and the positive feedback resistor network R100 R106 These values are chosen so that when the timing voltage reaches 10V the voltage at the input...

Страница 27: ...9720 VCO 27 010321...

Страница 28: ...60 4 18k brown grey orange R4 R11 R81 R86 2 1k brown black red R31 R57 1 22 red red black R1 4 220 red red brown R24 R46 R50 R88 8 2200 red red red R13 R15 R22 R32 R65 R74 R83 R84 3 220k red red yello...

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