Adjustment Procedure—2213 Service
POWER SUPPLY AND CRT DISPLAY
Equipment Required (see Table 4-1)
Leveled Sine-Wave Generator (Item 2)
Digital Voltmeter (Item 11)
Time-Mark Generator (Item 3)
Test Oscilloscope and IX Probe (Item 12)
50+2 BNC Cable (Item 4)
DC Voltmeter (Item 13)
50+2 BNC Termination (Item 5)
Screwdriver (Item 14)
Variable Autotransformer (Item 10)
See
a t the back o f this manual fo r location o f test points and adjustments.
NOTE
Before applying pow er to the 22 13, make the in itia l
control settings. Connect the 2 21 3 to an appropriate
pow er source through a variable autotransformer,
adjusted fo r an output o f 115 V. A p ply pow er to
both the instrument and the test equipm ent and
allo w a 20-m inute warm-up perio d before com
mencing the adjustments and checks
INITIAL CONTROL SETTINGS
CRT
AUTO INTENSITY
As desired
AUTO FOCUS
Best focused display
Vertical (both)
POSITION
Midrange
VERTICAL MODE
CH 1
VOLTS/DIV
0.1 V
VOLTS/DIV Variable CAL detent
AC-GND-DC GND
Horizontal
POSITION
Midrange
HORIZONTAL MODE
NO DLY
SEC/DIV
5 /is
SEC/DIV Variable CAL detent
X10 Magnifier
Off (knob in)
Trigger
VAR HOLDOFF
NORM
TRIGGER MODE
TV FIELD
TRIGGER SLOPE
J-
TRIGGER LEVEL
Midrange
INT
VERT MODE
SOURCE
INT
PROCEDURE STEPS
1. Check/Adjust Power Supply DC Levels and
Ripple (R946 and R952)
NOTE
Review the information a t the beginning o f the Adjust
m ent Procedure before starting this step.
a. Remove the High-Voltage shield (see the ‘ High-
Voltage Shield” removal procedure in Section 6) if the
instrument has the Current Limit board (A19). If the
instrument has the Preregulator board (A18), remove the
protective shield on the bottom of the Main board (A10) to
access the test point pads.
J V A R N IN t ^
To avoid electric shock and instrument damage when
checking either the Head Room Voltage o r the
Preregulator Output Voltage, use a digital voltmeter
that is isolated from ground, since the Inverter pow er-
supply circuitry common is a t line potential.
b. Connect the digital voltmeter low lead to common
(TP934). If the instrument has the Current Limit board (A19),
connect the volts lead to TP952. If the instrument has the
Preregulator board (A18), connect the volts lead to TP940.
c. CHECK— Reading is +4.2 V to +4.4 V for instru
ments having the Current Limit board. Reading is 41 V to
44 V for instruments having the Preregulator board. If the
reading is within these limits, skip to part e.
5-4
REV NOV 1982
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