To Check The Display Board Video Signals - Keysight Infiniium 9000 Series Service Manual

4
Troubleshooting

To check the display board video signals

The video signals are checked on the 32-pin connector on the display board. You
can use an oscilloscope with a bandwidth of at least 100 MHz to verify the signals.
Even-numbered pins are closest to the PC board. If the signals are not present,
suspect the display card. If the signals are present and the backlights are on,
suspect the flat-panel display as the problem. Note that CLK, A0, A1, A2, and A3
are Low Voltage Differential Signals (LVDS).
Table 12 Video Signals
Pin Signal
Number
1 NC
2 CLK-
3 CLK+
4 GROUND
5 A3-
6 A3+
7 GROUND
8 A2-
9 A2+
10 GROUND
11 A1-
12 A1+
13 GROUND
14 A0-
15 A0+
16 NC
76
Pin Number
17
(LVDS 18
pair)
19
20
(LVDS 21
pair)
22
23
(LVDS 24
pair)
25
26
(LVDS 27
pair)
28
29
(LVDS 30
pair)
31
32
Signal
NC
NC
NC
NC
GROUND
GROUND
+3.3 V
+3.3 V
+3.3 V
NC
NC
NC
NC
NC
NC
NC
Infiniium 9000 Series Oscilloscopes Service Guide