Voltage-Resistance Test Chart - Boonton 75D Instruction Manual

t NOTE 9
VIOI
6AU6
V20 2
6AU6
6.3V AC
V302
I2AT7
P60I
VI02
6 AU6
V203 (NOTE 6)
6AU6
V60I
6X4
ov
V20I
6 AU6
6.3V AC
V 301
12 AT 7
ov
V602
0A2
NOTES.
1. VOLTAGES ARE ABOVE THE LINES, RESISTANCES BELOW.
2. MEASUREMENTS MADE WITH 20Kn PER VOLT VTVM OR
MULTIMETER, NEGATIVE PROD AT CHASSIS GROUND.
3. UNLESS OTHERWISE SPECIFIED, VOLTAGES ARE DC AND
RESISTANCES ARE IN OHMS: K = I03, M « 106, AND
oo = INFINITY.
4. ALL VALUES ARE ±20%.
5. BEFORE MEASURING VOLTAGES, DISCONNECT PIOI
AND REMOVE TUBE V203.
6. INSTALL TUBE V203 WHEN MEASURING VOLTAGES AT
V 203 ONLY.
7. AFTER MEASURING VOLTAGES RECONNECT PIOI AND
INSTALL V 203 .
8. BEFORE MEASURING RESISTANCES, DISCONNECT P30I AND
P601,AND CHECK THAT POWER SWITCH IS IN OFF POSITION.
9. SET ZERO LEFT/ZERO CENTER SWITCH TO THE ZERO
LEFT POSITION.
10. WHEN RESISTANCE MEASUREMENTS ARE COMPLETED,
RECONNECT P30I TO J 301 AND P60I TO J 601 .
75 D
b-370
Figure 10. Voltage-Resistance Test Chart
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