Interlock Switch; Unleaded Solder - Sony OEP-4 Service Manual

1-5-12. Interlock Switch

1. Remove the top cover. (Refer to Section 1-3-1.)
2. Remove the front panel assembly.
(Refer to Section 1-3-2.)
3. Remove the MA-142G board. (Refer to Section 1-4-1.)
4. Remove the mechanical main unit assembly.
(Refer to Section 1-5-2.)
5. Remove the two screws, then remove the interlock
plate and SE-755 board.
6. Disconnect the harness from the connector on the SE-
755 board.
7. Attach the interlock switch in the reverse order of
steps 1 to 6.
OEP-4
SE-755 board
TO MA-142G
CN203
BVTT
2.6 x 5
Interlock plate

1-6. Unleaded Solder

Boards requiring use of unleaded solder are printed with a
lead free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come
printed with the lead free mark due to their particular size.)
: LEAD FREE MARK
m
. Be sure to use the unleaded solder for the printed circuit
board printed with the lead free mark.
. The unleaded solder melts at a temperature about 40 dC
higher than the ordinary solder, therefore, it is recom-
mended to use the soldering iron having a temperature
regulator.
. The ordinary soldering iron can be used but the iron tip
has to be applied to the solder joint for a slightly longer
time. The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful.
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