Table of Contents
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Adjustment Procedure— 2230 Service
Equipm ent Required (See Table 4-1):
Leveled Sine-Wave Generator (Item 2)
Time-Mark Generator (Item 3)
Digital Voltmeter (Item 7)
See S
ADJUSTMENT LOCATIONS i
INITIAL CONTROL SETTINGS
Vertical
POSITION (both)
VERTICAL MODE
X-Y
CH 1 VOLTS/DIV Variable
Channel 1 AC-GND-DC
Horizontal
POSITION
HORIZONTAL MODE
SEC/DIV Variable
X I0 Magnifier
A TRIGGER
VAR HOLDOFF
Mode
SLOPE
LEVEL
HF REJECT
A&B INT
A SOURCE
A EXT COUPLING
Storage
STORE/NON STORE
SAVE/CONTINUE
PRETRIG/POST TRIG
ROLL/SCAN
1K/4K
POSITION CURS/
SELECT WAVEFORM
WAVEFORM
REFERENCE/
MENU SELECT
5-4
POWER SUPPLY AND CRT DISPLAY
at the back of this manual for location of test points and adjustments.
Midrange
CH 1
On (button in)
CAL detent
GND
Midrange
A
CAL detent
Off (knob in)
NORM
P-P AUTO
OUT
Midrange
OFF
VERT MODE
INT
AC
NON STORE (button out)
CONTINUE (button out)
POST TRIG (button out)
SCAN (button out)
4K (button out)
POSITION CURS
(button in)
WAVEFORM REFERENCE
(button in)
. —
50 ft BNC Cable (Item 8)
50 ft BNC Termination (Item 12)
Screwdriver (Item 19)
PROCEDURE STEPS
1. Check/Adjust Power Supply DC Levels (R938)
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
(W961).
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 (R938) for
a voltmeter reading of -8 .6 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.
2. Adjust CRT Grid Bias (R851)
a. Connect a 50 ft termination to the EXT Z AXIS
INPUT connector located on the rear panel.
b. Adjust thei front-panel FOCUS control to produce a
well-defined dot.
c. Rotate the A INTENSITY control fully counter
clockwise.
NOTE
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Troubleshooting
