Instruction Manual

RESISTANCE ANALYSIS OF ANALOG SECTION
S
tatic 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 12.3kΩ
Pin 11 (U6) Pin 3 (U10) Square Wave VR5 CW 6.7kΩ
SET SW3 TO TRIANGLE WAVE
From To Circuit Ohms Resistance Measured
Pin 2 (U6) Pin 3 (U10) Triangle Wave VR5 CCW 14.7kΩ
Pin 2 (U6) Pin 3 (U10) Triangle Wave VR5 CW 4.7kΩ
Pin 13 (U6) Pin 14 (U6) Triangle Wave Greater than 1kΩ
SET SW3 TO SINE WAVE
From To Circuit Ohms Resistance Measured
Pin 2 (U6) Pin 3 (U10) Sine Wave VR5 CCW 14.7kΩ
Pin 2 (U6) Pin 3 (U10) Sine Wave VR5 CW 4.7kΩ
Pin 13 (U6) Pin 14 (U6) Sine Wave 200Ω
Pin 3 (U6) GND (B1) Mult VR8 CCW < 10Ω
Pin 3 (U6) GND (B1) Mult VR8 CW 100kΩ
Pin 4 (U6) +12V (B3) VCC Less than 3Ω
Pin 7 (U6) –12V (B2) Fine Freq Adj VR7 CCW 108.2kΩ
Pin 7 (U6) –12V (B2) Fine Freq Adj VR7 CW 8.2kΩ
Pin 12 (U6) –12V (B2) GND Less than 3Ω
30% CCW - Counter-Clockwise CW - Clockwise
VR8
U10
U6
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