Atec Tektronix-1502 - Manual (Page 62)

TM 9-4935-601-14-3&P
2. Lift up carefully on the rear of the cavity shield, applying heat to the solder connections to the bnc
connector if necessary.
If the front of the shield was fastened by Econobond, it can be removed by lifting the rear of the shield
carefully until the bonding comes loose.
3. With the shields removed, pull the wire attached to the rear of the tunnel diode holder until the tunnel
diode can be raised free of its holder.
4. Place a new tunnel diode in the holder with its fins pointing towards the rear of the 1502.
5. Re-assemble the shields in reverse order, soldering or if it was bonded, rebonding the cavity shield to
the bnc connector. Do not use too much heat or solder. The bonding material is listed at the end of this
section.
230 V Operation
The battery charger is factory wired for 115 V ac or 230 V ac if Option 6 is ordered. The standard 115 V ac
unit can be changed to 230 V ac operation by rewiring the line transformer. The Power Supply circuit diagram
(number 6) and Fig. 5-4 show the proper wiring configuration for 230 V operation.
CAUTION
When the 1502 is wired for 230 V ac, be sure that the plug is installed on the ac
cable and that the proper fuses are installed. Refer to the Electrical Parts list.
REPACKAGING FOR SHIPMENT
If the Tektronix instrument is to be shipped to a Tektronix Service Center for service or repair, attach a tag
showing: owner (with address) and the name of an individual at your firm that can be contacted. Include
complete instrument serial number and a description of the service required.
Save and re-use the package in which your instrument was shipped. If the original packaging is unfit for
use or not available, repackage the instrument as follows:
Surround the instrument with polyethylene sheeting to protect the finish of the instrument. Obtain a carton
of corrugated cardboard of the correct carton strength and having inside dimensions of no less than six
inches more than the instrument dimensions. Cushion the instrument by tightly packing three inches of
dunnage or urethane foam between carton and instrument, on all sides. Seal carton with shipping tape or
industrial stapler.
Figure 5-4. 230 Vac Transformer Wiring.
The carton test strength for your instrument is 275 pounds.
Water-tight Seals
The 1502 is prepared to be operated in any weather (rain, snow, dust, etc.). To prevent moisture and dust
from getting inside the Instrument, special seals are used.
In order to maintain the water-tight integrity of the 1502, it is important to visually inspect the water-tight
seals periodically. Seals around the X-Y Output Module, the battery pack and the front cover seal on the front
panel should be checked regularly to see that they have not become damaged. The clam shell seal on the
back of the front-panel casting and the seals around the front-panel controls and connectors should be
inspected when the cabinet has been removed for maintenance calibration purposes, or if a leak is suspected.
CAUTION
Anytime the cabinet has been removed from the 1502 or when any front panel controls or connectors have
been removed from the front panel, the watertight integrity of the 1502 will be jeopardized.
REV B FEB 1980
5-6