Elenco DataCom Tester Kit - Manual (Page 21)

Straight Cable
r 1. Connect one end of the straight cable to the
modular jack on the PC board of the terminator
and the second end to the PC board of the
cable tester as shown in Figure 16a.
r 2. Push switch SW1 until the two vertical LEDs
D1 and D9 are blinking alternately and LED
D16 should be blinking too.
r 3. Check the other LEDs by pressing switch SW1
and referring to Table 1 below. The single
blinking LED should always be on the top row.
If the LEDs are not functioning properly, then:
a) Check the cable using a master tester.
b) Check the ICs U2, U3 and LEDs D1-D16
on the PC board of the tester. They
should be mounted as shown in the
assembly instructions.
c) Check that resistors R1-R8 on the PC board
of the tester are the correct values (200Ω).
d) Check diodes D1-D4 on the PC board of
the terminator. Be sure that the diodes
are installed as shown in Figure D in the
assembly instructions.
Cross-Pinning Cable
r 1. Remove the straight cable and connect the
cross-pinning cable to the modular jacks on
the PC boards of the tester and terminator.
r 2. Push switch SW1 until the two vertical LEDs
D1 and D9 are blinking alternately and LED
D8 should be blinking too.
r 3. Check the other LEDs by pressing switch SW1
and referring to Table 2 below. The single LED
should always be on the bottom row. If not, then:
a) Check the cable using the master tester.
b) Check diodes D1-D4 on the PC board of
the terminator. Be sure that the diodes
are installed as shown in Figure D in the
assembly instructions.
Short Test
r 1. Push switch SW1 until the two vertical LEDs
D4 and D12 are blinking alternately and LED
D5 is blinking too.
r 2. Using a short piece of wire or a discarded lead from
one of the components, short the F-connector on
the terminator PC board as shown in Figure 16b.
The LED D13 should be blinking too. Remove the
jumper and LED D13 should turn off. If not, then:
a) Check the F-connector on the terminator PCB.
r 3. Short the F-connector on the tester PC board. The
LED D13 should be blinking again. If not, then:
a) Check the F-connector on the terminator PCB.
r 4. Remove the cable from the modular jacks on
the PC board and proceed to the final
assembly.
-20-
SECTION G - FINAL TEST
Two Vertical Straight Cable
# Blinking LEDs Single Blinking
LED on Top Row
1 D1 and D9 D16
2 D2 and D10 D15
3 D3 and D11 D14
4 D4 and D12 D13
5 D5 and D13 D12
6 D6 and D14 D11
7 D7 and D15 D10
8 D8 and D16 D9
Figure 16b
Figure 16a
Two Vertical Cross-Pinning Cable
# Blinking LEDs Single Blinking
LED on Bottom Row
1 D1 and D9 D8
2 D2 and D10 D7
3 D3 and D11 D6
4 D4 and D12 D5
5 D5 and D13 D4
6 D6 and D14 D3
7 D7 and D15 D2
8 D8 and D16 D1
Table 1
Table 2