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12-6
IM 704610-01E
12.4 Self Diagnostics (Self Test)
Procedure
MEDIA
FUNCTION
POLARITY
ARMING
INHIBIT
LOCAL
RECALL
ENTER
TRIG
IMPEDANCE EQUALIZER
SEC RANGE
KEY
LOCK
MEASURE
DISP OFF
JUDGE
GO
NO-GO
10%
20%
S
SEC RANGE
SCALE
L.MARK
R.MARK
GATE TIME
DELAY
BLOCK
REMOTE
STORE
UTILITY
JDG LEVEL
LEVEL
AUTO
COUPLE
EQ BOOST
MAN
CONV
50
Ω
1M
Ω
PW
E2T
D to C
BD x1
ns ms
s
%
V
%/
S
SHIFT
SHIFT
Display 1
Display 2
POWER
Before starting the self test, remove all cables connected to the instrument (both
input and output) other than the power cable and communication cable. When
doing so, make sure that the TA220 is not in remote mode.
For the procedure in switching from remote mode to local mode, see section 8.2 or section
9.1.
Starting in Maintenance Mode
1.
Check that the power switch is turned OFF.
2.
Hold down SCALE and turn ON the power switch (press POWER ). Hold
SCALE down for approximately three seconds. When the power switch is
turned ON, the model name and results of each test are displayed on Display 2
(model name -> EQ board -> MEMORY -> ETHER, and so on). At this point the
instrument enters maintenance mode, and TESTMODE is displayed on Display
2.
Display and Indicator Test
3.
Press MEDIA . LED is displayed in Display 2.
4.
Turn the rotary knob to the right. Confirm that the lit indicator position moves in
order from the upper left to the lower right, starting with the two types of dot
patterns on Display 2. The 7-segment LED and decimal point on Display 1 are
also lit one segment at a time.
Turn the rotary knob to the left and confirm that the lit position of the indicator
moves from the lower right to the upper left in order.
5.
Press <. TESTMODE is once again displayed in Display 2.
Key and Rotary Knob Test
3.
Press FUNCTION . KEYBOARD is displayed in Display 2.
4.
Press a key and confirm that the corresponding character(s) is displayed in
Display 2.
Turn the rotary knob and confirm that the word indicating the correct direction
(JogRight or JogLeft) is displayed in Display 2.
Press < or > and confirm that Left or Right is displayed in Display 2.
5.
Press < twice. TESTMODE is once again displayed in Display 2.