Power Supply And Crt Display - Tektronix 214 Manual

Equipment Required (see Table 4-1 )
Leveled Sine-Wave Generator (Item 1 )
Ramp Generator (Item 4)
50-2 Terminator ( Item 10)
BNC- Male-to-Probe Tip Adapter (Item 7)
Display
See ADJUSTMENT LOCATIONS 1
INTENSITY
STORE
Trigger
INITIAL CONTROL SETTINGS
Vertical (Both Channels)
VOLTS/DIV
INPUT COUPLING
POSITION
VOLTS/DIV Variable
VERT MODE
LEVEL/SLOPE
TRIG SOURCE
POWER SUPPLY AND CRT DISPLAY
Horizontal
HORIZ MAG
POS
SEC/DIV
SINGLE SWP
Off ( ccw )
Off ( button out)
50 mV
GND
Midrange
CAL detent
CH 1
AUTO PRESET
COMP
CAL detent
Midrange
0.1 ms
Off ( button out)
at the back of this manual for location of test points and adjustments.
PROCEDURE STEPS
1. Check Power Supply DC Levels
a . Connect the digital voltmeter negative (low ) lead to
chassis ground and connect the positive (volts) lead to the
power supplies listed in Table 4-2 . Observe proper meter
polarity.
Calibration
214 Service (SN B300000 & ABOVE )
Digital Voltmeter (Item 12)
DC Voltmeter (Item 13)
Screwdriver (Item 14)
1X Probe ( Item 16)
b. CHECK- Voltage levels of the power supplies listed in
Table 4-2 are within the specified levels.
Power
Supply
-5.6 V
+5.6 V
+65 V
Table 4-2
Power Supply Limits
Test
Point
P3 pin 4
P3 pin 3
P3 pin 1
Reading
(Volts)
-5.2 V to -6.0 V
+5.2 V to +6.0 V
+61 V to +69 V
c . Disconnect the test equipment from the instrument.
d . Connect a dc voltmeter capable of measuring
- 1000 V between pin 3 of P2 and chassis ground . Pin 3 is
negative with respect to the chassis.
e. CHECK - Voltmeter reading is between -920 V and
- 1000 V.
f . Disconnect the test equipment from the instrument.
4-5