Adjustment Procedure-2225 Service
POWER
SUPPLY AND
CRT
DISPLAY
Equipment Required (See Table
4-1):
Leveled Sine-Wave Generator (Item
2)
Digital Voltmeter (Item
7)
Time-Mark Generator (Item
3)
50-a BNC Coaxial Cable (Item 8)
Screwdriver (Item 5)
50-a BNC Termination (Item 10)
See ADJUSTMENT LOCATIONS at the back of this manual for adjustment locations.
INITIAL CONTROL SET'I'INGS
INTENSITY Visible display
Vertical
POSITION (both) Midrange
MODE CH 1, NORM
VOLTSIDIV (both) 10 mV
VOLTSIDIV Variable (both) Cal detent
Magnification (both)
Xl (CAL
knobs in)
AC-GND-DC (both) GND
Horizontal
POSITION (COURSE and FINE) Midrange
MODE X
1
SECIDIV X-Y (fully
CCW)
SECIDIV Variable CAL detent
MAG X5
Trigger
SLOPE
LEVEL
MODE
HOLDOFF
SOURCE
COUPLING
Positive
(I)
Midrange
P-P AUTO
MIN
EXT, EXT
AC
PROCEDURE STEPS
1.
ChecklAdjust Power Supply DC Levels (R933)
NOTE
Review the information at the beginning of the
Adjustment Procedure before starting this step.
a. Connect the digital voltmeter low lead to
chassis ground and connect the volts lead to the
-8.6 V supply
(W989).
b. CHECK-Voltmeter reading is -8.56 to -8.64 V.
If the reading is within these limits, skip to part d.
c. ADJUST-The -8.6 V Adj potentiometer
(R933)
for a voltmeter reading of -8.60 V.
d. CHECK-Voltage levels of the remaining power
supplies listed in Table 5-2 are within the specified
limits.
e. Disconnect the test equipment from the
instrument.
REV
APR
1990
Scans
by
ARTEK
MEDL4
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