Tektronix 213 DMM - Page 45

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METAL
SHIELD
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MYLAR
INSULATOR
Maintenance-213 Service
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LAMINATE
SHIELD
1481-4
Figure 4-5. Power Supply Board disassembly.
POWER SUPPL V BOARD REPLACEMENT. Replace the
Power Supply Board in the reverse order of Removal. Insure
that the two-connector terminal connector holder from the
crt base socket has been plugged into the board before
installing the crt base socket.
SIDE PANEL REMOVAL. To remove the side panel, per-
form the Removal steps for the cabinet, batteries, and A/D
Converter Board, then proceed as follows:
1. Disconnect the LED terminal connector holder from the
Power Supply Board (see Figure 4-9), then remove the side
panel assembly (side panel with Attenuator and Function
Boards) by lifting it up and free of the Amplifier Board
terminal pins.
2. Remove all knobs from the front panel and side panel
(retained only by a tight fit). Depress all pushbuttons so
@
they remain in a depressed condition (the VOL TS, mA, and
Q pushbuttons will have to be pushed simultaneously to
lock them in the depressed position).
3. Remove the two side panel attaching screws located on
the Function Board side of the assembly (see Figure 4-6).
Remove the board assembly (Attenuator and Function
Boards) from the side panel by simultaneously raising the
rear of the board assembly (end opposite the pushbuttons)
and pulling it toward the rear.
NOTE
The slide switch covers, which form a part of
the operator safety protection, may drop free
of the Attenuator Board at this time. These
covers, as well as the potentiometer insulator
bushings should be removed to prevent loss.
4-7