Service manual

102 Index
dc rail board, 63
FET board, 63
front panel, 60
GPIB board, 59
H bridge, 63
input board, 62
output circuits, 64
principles of, 59
P
performance
tests, 9, 11
power-on selftest, 26
disabling, 26
R
replaceable parts
ac input assembly, 68
bias assembly, 68
chassis, 65
dc rail assembly, 68
down programmer/slow sense, 68
fast sense assembly, 68
FET assembly, 68
front panel, 67
GPIB board, 67
S
safety
symbols, 4
SBUF FULL, 27
schematic
ac input board, 85
bias board, 89
cabling diagram, 75
control board, 95
dc rail board, 87
down programming/fast sense, 93
fast sense board, 92
FET board, 81
front panel board, 77
GPIB board, 79
notes, 73
power mesh, 91
RFI board, 83
snubber board, 92
SECONDARY DN, 27
selftest
error messages, 27
SERIAL DOWN, 27
serial number, 7
SERIAL TIMOUT, 27
signal names, 70
SUBF OVERRUN, 27
T
test equipment
troubleshooting, 25
test header, 42
test points, 70
waveforms, 73
test record form
6690A, 21
6691A, 22
6692A, 23
tests
constant current, 15
constant voltage, 12
equipment required, 10
performance, 9, 11
selftest, 26
verification, 9, 11
transient recovery time test, 14
troubleshooting
DAC circuits, 37
FETs, 41
no display, 32
output held high, 36
output held low, 35
OV at turn on, 34
OV will not fire, 33
overall, 28
secondary interface down, 39
serial down, 38
slow downprogramming, 40
TST? query, 26
U
UART OVERRUN, 27
UART FRAMING, 27
UART PARITY, 27
V
verification
tests, 9, 11
voltage programming and readback accuracy test, 13
W
warranty, 2