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MAR. 27,198O OPH43B 149H043B
(Etch mask 052H15OB)
Connect an oscilloscope to T?-3 on OPR47. Apply reference F note to the scope X0. I?1 for Lissajous figures. C) ElllrIGE A) 'WIDTH --refer to A)WIDTH for details-Set RANGE at 8'. 1. With F3 key held down, adjust VR-8 for motionless figures. 2. While pressing down Fl key, adjust VR-9 for motionless figures. F3 pitch will vary as VR-9 turned. 3. Repeat steps 1 and 2 until F3 and Fl figures stand still. B) LINEARITY -- details follow A) WIDTH -Set RANGE at 2'. Adjust the pots. 1. Fl key --- VR-8. 2. F3 key --- 'JR-3. 3. Repeat steps 1 and 2. Set RANGE at 32'. Obtain stable Lissajous figures. 1. Fl key --- VR-8. Place RANGE at 2'. Obtain motionless figures. 1. Fl key --- W-7. Dl FREQUENCY Set RANGE Set TUNE 1. While VR-8 for at 8'. at,its midpoint. playing A2 key,adjust 440 Hz.
View from the foil side
ADJUSTMENT
KEY DESIGNATION only for tne adjustments Fl Ci F; h2
BENDER
F3
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Panel setting and connection:,,/iDigital voltmeter! at 10 _,' 1. Flip and hold Bender lever at the left(-). Note the reading. L~C 2. Turn and hold the lever at the right (+). Adjast VR-6 on OPH40 for the same reading, but opposite polarity, as in step 1. (Difference between two readings must be within 30 mv.j
KCV
E) DUTY CYCLE Set WAVEFORM at m . 1. Adjust VR-2 for 1:l mark/space.
Adjustments A and B must be repeated because of cross interference between them.
VCF
A) WIDTH Set Controls as shown below. 1. While pressing A2 key, set CUTOFF FREQ. for approximate 1 'kHz. 2. While playing F2 and F3 keys alternateiy, turn VR-5 until F3 figure doubles F2 in cycle. 5 FREQTUEMCY
Ctinniect ;igital voltmeter to TP-2 on OFHK. 1. Press Fl key and note the reading, (Fl-7). 2. While ,-ressi:lg F3 key, adjust '/R-l 0:: CFii-LiT; for FL--r f 2.233 7 reading. 3. Sir.ce turning X3-1 has an effect on FL--T,
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Connect 2sci;lsscope to
TP-3 3n G1HJ7.
repeat steps 1 and 2 .until F3--T becomes Fl-V + 2.330 v + 1 m!v.
Slide up CUTOFF knob to "10". 1. With Fl key held down, set 'JR-4 for 20 kHz.
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