Elenco Deluxe Digital / Analog Trainer with Tools Kit Ver Manual de usuario Pagina 16

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RESISTANCE ANALYSIS OF POWER SUPPLY
S
tatic testing of the power supply circuits. Do not plug the power supply into the 120VAC power supply
s
ource until all resistance readings check out. The values given below are approximate.
See Figure AA for locations of testing points.
Resistance
From To Circuit Ohms Measured
1 Right Side Panel Earth Ground less than 1W
23 On/Off Switch, Fuse Infinite (SW1 Off)
23 On/Off, Fuse 7W (SW1 On)
45 12V Secondary 1.5W
67 5V Secondary 1.2W
89 Variable Voltage 1.6W
10 GND 5-pin connector +12V Regulator Input greater than 20kW
11
(com)
GND (VW)
(5-pin connector)
–12V Regulator Input greater than 20kW
12 GND (B1) +5V Regulator Input greater than 20kW
13 GND (B1) +Variable Regulator Input greater than 20kW
14 (com)
GND (VW)
(5-pin connector)
–Variable Regulator Input greater than 20kW
25
(
com)
GND (VW)
(5-pin connector)
Voltage ADJ +20V Regulator
CCW <1W CW >1.4kW
26 GND (VW)
(5-pin connector)
Voltage ADJ -20V Regulator greater than 1.4kW
27 GND (5-pin connector) +5V Regulator GND less than 1W
28 GND (5-pin connector) +12V Regulator GND less than 1W
29 GND (5-pin connector) –12V Regulator GND less than 1W
10 15 +12V Regulator Input less than 1W
11 16 –12V Regulator Input less than 1W
12 17 +5V Regulator Input less than 1W
13 18 +Variable Regulator Input less than 1W
14 19 –Variable Regulator Input less than 1W
20 14 Voltage ADJ +20V Regulator
CCW 1.2kW CW 3.3kW
20 +20 (5-pin connector) +Variable Regulator Output less than 1W
20 13 Voltage ADJ –20V Regulator
CCW 1.2kW CW 3.3kW
21 –20 (5-pin connector) –Variable Regulator Output less than 1W
22 GND (5-pin connector) +5V Regulator Output greater than 5kW
22 B4 +5V Regulator Output less than 1W
23 GND (5-pin connector) +12V Regulator Output greater than 5kW
23 B3 +12V Regulator Output less than 1W
24 GND (5-pin connector) –12V Regulator Output greater than 5kW
24 B2 –12V Regulator Output less than 1W
5
15VAC (5-pin connector right)
15VAC less than 1W
4
15VAC (5-pin connector left)
15VAC less than 1W
+30% Note: meter lead polarity CCW - Counter Clockwise CW - Clockwise VR1 & VR2 Adjustment
20A
2A COM
VW
VW
COM
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