9-4
Memory Upgrades and Other Options
Using Headphones with the K2600
2. Locate the access panel. On keyboard models, itÕs about 6 by 13 inches in size, slightly to
the right of center, toward the back of the instrument. On rack models, itÕs about 7 by 12
inches, and takes up a large portion of the underside of the instrument.
3. Remove the screws that hold the access panel in placeÑeight for the keyboard and six for
the rackÑand swing the panel open from the front. It hinges at the back, and rests in a
position thatÕs convenient for referring to the diagram thatÕs printed on the inside of the
panel.
4. Locate the two sockets for sample RAM. Note the location of the socket for the P/RAM-26
option. DonÕt put sample RAM into the P/RAM socket! Doing so could cause serious
damage to the K2600, the SIMM, or both.
5. Place a SIMM into one or both of the sample RAM sockets. If youÕre putting in two
SIMMs, be sure that their sizes are compatible, as shown in Table 9-1. ThereÕs only one
way that the SIMMs will Þt into the sockets; they wonÕt Þt at all if theyÕre facing the wrong
way. Be sure the clips at the sides of the sockets snap into place.
6. Check the setting of the voltage jumper, and change it if it doesnÕt match the voltage of
your SIMMs. The K2600 arrives from the factory with the jumper set for 3-volt SIMMs.
Since most SIMMs these days are 5-volt, youÕll probably need to change the jumper
setting.
The jumper is a small piece of molded plastic with a wire loop at the top. It has two slots
that slide over two of the three pins that stick up from the circuit board. The pins are
numbered from 1 to 3,
right-to-left
. Put the jumper on pins 2 and 1 (the two right-most
pins) to conÞgure the K2600 for 5-volt SIMMs, or on pins 3 and 2 (the two left-most pins)
to conÞgure it for 3-volt SIMMS. The circuit board is labeled accordingly.
We set the conÞguration for 3 volts so that if you were to install 3-volt SIMMs while
thinking you were installing 5-volt SIMMS, you wouldnÕt pose any risk to your
instrument.
7. Replace the access panel and loosely install the screws, starting with those closest to the
hinge (the back) of the access panel. When the screws are loosely in place, tighten them all.
Using Headphones with the K2600
A good pair of headphones can be indispensable when you want to play but need to keep the
volume down. YouÕll get optimum performance from headphones with at least 50 ohms
impedance, but anything over eight ohms is adequate. Headphone volume decreases as the
impedance decreases.
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