A 3 0 Handler Interface (Opt.201) Service Sheet 4 - A - Agilent Technologies 4284A Service Manual

4-19. A30 HANDLER INTERFACE (OPT.201) SERVICE SHEET
4-19-1. CIRCUIT DESCRIPTION
The A30 handler interface board consists of photo couplers, and the peripheral interface
adapters.
[ Photo Couplers ]
Photo couplers A30U1 through A30U7 opto-isolate the input and output signals. Jumpers
A30W1 through A30W11 ) are set according to the pull up voltages used. F o r more detail
information about the input/output signals and jumpers, refer to the handler interface opera-
tion note in the HP 4284A operation manual.
[ Peripheral Interface Adapters ]
A30U13 and A30U14 are peripheral interface adapters ( PlAs ) which interface between the
A7 CPU board and the A30 board.
4-19-2. TROUBLESHOOTING AIDS
The test points are listed in Table 4-A30-1.
Test Point Signal Name
A3OTP1
A3OTP2
A3OTP3
A3OTP4
4-19-3. REPLACEABLE PARTS LISTS
The replaceable parts of the A30 handler interface board are listed in Table 4-A30-2.
4-19-4. COMPONENT LOCATIONS
The component locations of the A30 handler interface board and the board connector pin
assignments are shown in Figure 4-A30-1.
4-19-5. SCHEMATIC DIAGRAMS
The schematic diagram of the A30 handler interface board is shown in Figure 4-A30-2.
Table 4-A30-1. Test Point List
Description
GND Ground line
+5V + 5 V DC
BE 792 kHz Clock signal
EXT.TRIG signal
4-A30-1
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