Elenco Digital / Analog Trainer Kit Version - Manual (Page 32)

RESISTANCE ANALYSIS OF ANALOG SECTION
Static testing of the analog circuits. Do not plug in the power supply into 120VAC power source until all
resistance readings check out. The values given below are approximated.
SET SW3 TO SQUARE WAVE (refer to top panel)
From To Circuit Ohms Resistance Measured
Pin 11 (U6) Pin 3 (U10) Square Wave VR5 CCW 12.3k
Ω
Pin 11 (U6) Pin 3 (U10) Square Wave VR5 CW 6.7k
Ω
SET SW3 TO TRIANGLE WAVE
From To Circuit Ohms Resistance Measured
Pin 2 (U6) Pin 3 (U10) Triangle Wave VR5 CCW 14.7k
Ω
Pin 2 (U6) Pin 3 (U10) Triangle Wave VR5 CW 4.7k
Ω
Pin 13 (U6) Pin 14 (U6) Triangle Wave Greater than 1k
Ω
SET SW3 TO SINE WAVE
From To Circuit Ohms Resistance Measured
Pin 2 (U6) Pin 3 (U10) Sine Wave VR5 CCW 14.7k
Ω
Pin 2 (U6) Pin 3 (U10) Sine Wave VR5 CW 4.7k
Ω
Pin 13 (U6) Pin 14 (U6) Sine Wave 200
Ω
Pin 3 (U6) GND (B1) Mult VR8 CCW < 10
Ω
Pin 3 (U6) GND (B1) Mult VR8 CW 100k
Ω
Pin 4 (U6) +12V (B3) VCC Less than 3
Ω
Pin 7 (U6) –12V (B2) Fine Freq Adj VR7 CCW 108.2k
Ω
Pin 7 (U6) –12V (B2) Fine Freq Adj VR7 CW 8.2k
Ω
Pin 12 (U6) –12V (B2) GND Less than 3
Ω
30% CCW - Counter-Clockwise CW - Clockwise
VR8 U10 U6
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