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6. Inspect'the internal components for signs of deterioration, discoloration, or charring.
Check for melted insulation and damaged, cracked, or broken components.
7. Inspect the printed circuit boards for damaged tracks, loose connections, carrosion,
or other signs of deterioration.
8. Inspect the PC connectors, interface connectors, and chassis wiring for excessive wear,
looseness, misalignment, corrosion, or other signs of deterioration.
5.2.2
Oeaning and Lubrication
Oeaning
Cleaning should be performed to remove accumulated dust, grease, and other contamination.
and to ensure trouble-free operation.
. CAUTION
Avoid the use of chemical cleaning agents containing benzene,
toluene, zylene, acetone, or similar solvents .. These chemicals
may damage the plastics used in this Receiver.
1. Exterior - Dust the cabinet off with a soft cloth. Dust the front panel controls with a
smail-bristled paint brush. Dirtdingingto the cabinet maybe removed with a clean,
lint-free cloth dampened with a mild detergent and water solution; Avoid using abrasive
cleaners. They will scratch thefront paneL
2. Interior- Dust in the interior
of
the unit should be removed before it builds up enough
to cause arcing and short circuits during periods of high humidity .. Dustis best removed
by
dry;
low"pressure ak:birtClingmg to sUrfaces may be"removedwith a soft-bristled .
paint brush or a clean. lint-free cloth dampened with a mild detergent and water solu-
tion. Use a cotton-tipped applicator for cleaning in narrow spaces and on the circuit
boards.
3. Switch Contacts - When maintenance is necessary due to accumulated dirt and dust
on the contacts, observe the following precautions: Oean the switch contacts with
isopropyl alcohol or a mild detergent solution. Avoid cleaning solutions containing
benzene. acetone, or similar solvents.
"
Lubrication
Lubrication is unnecessary in the Receiver. If the main tuning shaft appears to be binding
during rotation in either direction. perfonn the following;
1. Disconnect receiver power source .
.,
Loosen and remove the tuning knob.
3. Loosen the six (6) quarter-tum fasteners and remove the receiver top and bottom covers.
4. Remove the receiver front panel as directed in Paragraph 5.7, Assembly and Disassembly.
5-2
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