Tektronix 2235A Instruction Manual page 162

2235A Instruction
1. Locate the Circuit Board Illustration.
2. Determine the Circuit Number and Schematic Diagram.
3. Locate the Component on the Schematic Diagram.
a. Identify the Assembly Number of the circuit board that the component is
on by using the Circuit Board location illustration in this section or the
mechanical parts exploded views at the rear of this manual.
To identify any component mounted on
a circuit board and to locate that compo-
b. In the manual, locate the tabbed foldout page that corresponds with the
nent in the schematic diagram.
Assembly Number of the circuit board. The circuit board assembly num-
bers and names are printed on the back side of the tabs (facing the rear of
the manual).
a. Compare the circuit board with its illustration. Locate the component you a. Locate the tabbed page that corresponds to the Schematic Diagram
are looking for by area and shape on the illustration to determine its Circuit ber. Schematic diagram numbers and names are printed on the frond
h
Number.
,
4 of the tabs (facing the front of the manual).
b. Scan the lookup table next to the Circuit Board illustration to find the b. Locate the Assembly Number in the Component Location lookup
Circuit Number of the component. next to the schematic diagram. Scan the CIRCUIT NUMBER colur
that table to find the Circuit Number of the component you are lookir
c. Read the SCHEM NUMBER column next to the component's circuit num- in the schematic.
ber to find the Schematic Diagram number.
PULL-OUT
PAGE TABS
FOR
CIRCUIT BOARD
ILLUSTRATION
@,,,,,,
b " . , , . .
..#..,
i n Nl,nsn.nr, st,w
ASSEMBLY NUMBER
AND
CIRCUIT BOARD
NAME
A
\
A2O-XI PLOTTER BOARD,
1 % ~
AZO-XY PLOTTER BOARD
SCHEMATIC
LOOKUP
TABLE
ILLUSTRATION FOR
INSTRUMENT
BOARD
LOCATION
XY PLOTTER BOARD DIAGRAM 22
COMPONENT
LOCATION
TABLE
NUMERAL AND LETTER AT SIGNAL LINES
TO OR FROM OTHER DIAGRAMS INDICATES
THE GRID COORDINATES ON ANOTHER SCHEMATIC
(FOR EXAMPLE: 8J)
1. Determine the Circuit Board Illustration and Component Location. 2. Locate the Component on the Circuit Board.
a. From the schematic diagram, determine the Assembly Number of the cir- a.
In the manual, locate the tabbed page that corresponds to Assembly Num- c. From the small circuit board location illustration shown next to the circuit
cuit board that the component is on. The Assembly Number and Name is ber the component is on. Assembly numbers and names for circuit boards board, find the circuit board's location in the instrument.
To identify any component in a sche-
boxed and located in a corner of the heavy line marking the circuit board are on the back side of the tabs.
matic diagram and to locate that compo-
outline in the schematic diagram. d. Find the circuit board in the instrument. Compare it with the circuit board
nent on its respective circuit board.
b. Using the Circuit Number of the component and its given grid location, find illustration in the manual to locate the component on the circuit board
b. Find the Component Location table for the Assembly Number found on the the component in the Circuit Board illustration. itself.
scheyatic. Scan the CIRCUIT NUMBER column to find the Circuit Num-
ber of the component.
c. Look in the BOARD LOCATION column next to the cornponent number
and read its circuit board grid coordinates.
Figure 9-3. Locating components on schematic diagrams and circuit board illustrations.