Visual inspection of system parts is recommended to prevent malfunctions and
to ensure safe operation recommended items for checking and checking periods
are listed in table 5.1 references to more detail checks are also listed
beware of any special conditions under which the inspection must be performed
set the voltmeter range to five volts DC do not disconnect the plug jack p7 the
five volt DC power supplies must be measured and adjusted under its normal
load connect the probes positive to plug Jack p7 pin 4 and negative to plug Jack
p7 pin 3 the red color wire is +5 volts and the black color wire is zero volts
read the five volt DC measurement if it is necessary to adjust the 5 volt DC
power carefully turn the 5 volt adjuster on the 5 volt power supply unit PSU
until the digital voltmeter reads five point zero zero volts plus minus zero
point zero five volts do not allow the reading to exceed five
point two five volts DC remove the adapter cards if necessary to access the
5 volt adjuster check that the voltmeter reads 5 volts plus minus two percent
that is 4 point nine volts to five point one volts if necessary readjust the 5
volt adjuster in the PSU to obtain a 5 volt reading set the voltmeter to
measure fifteen point zero zero volts plus minus zero point zero five volts
to measure the plus 15 volts DC connect the probes to the marked measurement
points located near the power switch that is circuit breaker on the
motherboard connect the probes positive two plus 15 volts and negative 2a GND
set the power on/off switch to on and read the plus 15 volts DC measurement 14
point five five to fifteen point four five volts DC if the reading is too high
replace the plus five volts DC power supply and/or the motherboard if the
reading is too low check for a faulty adapter card and replace
the adapter card +5 volts DC and/or the motherboard to measure the - 15 volt DC
connect the probes to the marked measurement points located near the
power switch that is circuit breaker on the motherboard connect the probes
negative 2 minus 15 volts and positive to a GM D read the minus 15 volts DC
measurement - 14.5 5 volts DC - - 15 point 4 5 volts
DC if the reading is too high replace the plus 5 volts DC power supply
and/or the motherboard if the reading is too low check for a faulty adapter card
and replace the adapter card plus 5 volts DC and/or the motherboard make
sure the multimeter is set to read 24 volts DC read the 24 volt supply between
the indicated points of connection term alter the variable resistance load until
the light for 24 volt failure flashes turn the variable load back to full
turns 720 degrees turn the power off insert an empty EEPROM in socket ud6 on
both processor cards turn the power on the parameters will now be automatically
copied from the EEPROM in socket ud5 to the EEPROM in socket ud6 turn the power
off remove the EEPROM in socket ud6 mark the EEPROM with a label turn the power
on