Ramsey Electronics FZ-146 Specifications download pdf (Page 74)

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 A10. Study the PC board, locate the triangular set of 3 holes for VR2

(type 7805), and insert VR2 so that the flat metal tab side is toward the

center of the board. Press VR2 in as far as it will go, solder and trim.

 A11. Near VR2, install C100, a 4.7 or 10 uf electrolytic, oriented for

correct polarity.

Stage A PROGRESS TEST:

The power input circuitry is completed and can be tested before proceeding.

Perform the test as follows:

 1. Make sure a 1 amp fuse is installed in the fuse holder.

 2. Connect the fused (+) and black (-) wires to a 12-volt battery or

power supply (12-15 volts DC).

 Connect the black (-) lead of a DC voltmeter or VOM to the ground

plane of the PC board.

 Study the PC board and locate the three points marked +12V, +8V and

+5V. (These connections are provided for convenience in later

modifying or experimenting.)

 With the power switch turned on, you should get meter readings of

+12V, +8V, and +5V respectively. (If your meter probe does not have a

fine enough point to make solid contact inside the holes at these 3

points, simply study the multi-color PC board illustration and look for

+12, +8 and +5 volts DC on PC board traces that lead to the 3 voltage

points.)

After you are satisfied that the power input circuitry is working correctly,

disconnect the 12 volt source.

WIRING THE PACKET I/O CONNECTION:

 A12. Press J1, the Packet I/O DIN connector into position. Before

soldering, make sure that the bottom of the jack is perfectly flat against

the board. It is best to solder only the middle pin first, check for

straightness, and then solder the other 4 or 6 points. (DIN jack styles

may vary; your jack may have simply the 5 connector pins, or 2 extra

pins for mechanical stability. Either style fits your PC board.) Directions

for installing hardware or unusual parts often require extra written detail.

You've just been through a lot of that in this stage.

The following steps are more typical of how many upcoming installation

directions will be given:

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Ramsey Electronics FZ-146 Specifications Page 74