Adcom GFP-345 Manual page 11

INSTALLING THE PHO-802A BOARD IN THE GFP-345
ImITIS'802A* Ph0?? pre,amp b°ard reP'aces the standard AUX 1 © input. Any high-leve! source connected to the
AUX 1 © input must be relocated to one of the other high-level inputs not already in use. The AUX 1 © input must not
subsequently be used for a high-level source unless the PHO-802A board is removed and the jumper wires which must
be cut for use with the PHO-802A, replaced. . cn must
1. Begin installation by unplugging the GFP-345 power cord from the AC wall outlet and remove its cover by unscrewinq
the six Phil 1
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ps-head screws using a #2 Phillips screwdriver. The two hex-head screws securing the top cover to the
front panel must also be removed. A 2mm hex-wrench is necessary for this operation.
2. Cut the jumper wires Bt, B2 and B3 on the main PCB of the GFP-345 at the middle, raised portion, and fold awav the
cut ends to insure that the ends do not touch each other.
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3. Remove the top cap-nut on each of the screw studs shown in figure below and position the PHO-802A board over the
two5-pin connectors so that the corresponding Til and T12 sockets and 5-pin connectors mate properly and the larqe
upright capacitors (black, 2200uF/16V) are positioned, as shown in figure below, nearest the RCA input jacks on the
rear panel of the GFP-345. You can use the screw studs as guides.
4. Press the PHO-802A board down firmly onto the two 5-pin connectors.
5. Screw the two cap-nuts, back onto the screw studs and firmly secure the nuts onto the PCS with a 5.5mm nut-driver
or similar tool. Please note that the bottom cap-nuts must not be removed. The bottom cap-nuts secure the screw studs
L°j^r"PCBand alS° aCt as spacers for ,he ph°-802A board. They are essential to prevent shorting between the
PHO-802A board and the main GFP-345 PCB.
8. Replace the top cover on the GFP-345 making certain all the screws are tightened securely to be sure that proper
shielding of the internal circuitry of the GFP-345 is effected.
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There are two PHONO labels supplied with both the GFP-345 (in the plastic bag containing the instruction manual
e ci' a"d a,f° !ithe Packaging of the PHO-802A board. Affix one PHONO label on the front panel over the AUX 1 label
at the INPUT © selector so that now it will read PHONO. The AUX 1 position is the maximum counterclockwise
position of the INPUT © selector.
8. Affix the second PHONO label over the existing type above the RCA jacks on the rear panel which reads AUX 1 © so
that now it read PHONO. Although this is not absolutely necessary, it will simplify identification of the now-PHONO
input to the GFP-345.
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