Tektronix 1A5 Instruction Manual page 45

Maintenance — Type 1A5
CAUTION
Silk screen lettering dissolves when contacted by
flux remover.
Specific Component Replacement Information
VAR BAL Potentiometer. This is screwed into a mounting
post which is fastened to the rear of the front panel. Use
an alien wrench to remove and replace the nut which se ­
cures the assembly to the front panel.
DISPLAY switch (SW210)-Set at A-B
(sketched from rear)
PUSH ON/OFF switch assembly (SW297)
(sketched from rear)
4-8
Front-Panel Knobs.
knob movement when securing knobs to shafts.
VARIABLE knob. Place the VOLTS/CM knob in a "Re­
tained Range" position before the VARIABLE knob is fas ­
tened to its shaft.
Probe On Lamp.
surrounds the lamp housing.
extract the bulb from it.
Input Amplifier Board.
this board can be replaced without removing the board
To SW110C-1F
Differential Probe Connector (J 150 )
(sketched from rear)
Fig. 4-4. Component wiring.
Allow enough clearance for free
Unscrew the outer knurled nut that
Pull the lamp housing out to
Most of the components on
POLARITY (SW111)
( sketched from left side)
Ground
AMPLITUDE (R115) and Vc Cal (R113)
(sketched from above)
Shield
To K295B
To R1S3
To SW1 10-1R
To R152
To R151