Switch Circuit Fru Pin Numbers - HP Apollo 9000 400dl Service Handbook

Continue on with Step 5, Step 6, or Step 7, depending on the configuration of
the dc output voltages.
5.
I&h;t~~soutput voltages are not present at JO04,perform the following
A.
Check the ac outlet for wer with a voltmeter. If the ac outlet
r" power is incorrect, an e ectrrclan
must correct it.
B. With the power-on switch open, use a voltmeter to check Pin 8 on
the JO04connector for +16 to +20 V dc. If the voltage is not cor-
rect, replace the power supply.
If the voltage is corrcxt at Pin 8, close the power-on switch. If you
read Pin 8 at ound, replacx the power supply. If you still detect
r +16 to +20 dq replace the power-on swrtch anel. 'Ifthe new
L s#.~: doesn't f~ the problem, replace these FR sin the following
Ribbon Cable (connects L ED board to CPU board)
LED Board
CPU Board
You
can check these FRUS before you replace them by checkhg
the power-on switch circuits for continuity, as shown in Table 4-2.
Checkfor continuity with Connectors JO04and JO02unplu cd.
?" Refer to Fimtre 4-12 for the locations of the uxmectors an pms
listed in Table
&2.
Table 4-2. Switch Circuit FRU Pin Numbers
lb CheckThis FRU
Cheek for Continuity Between
These 'NO Connectors
mu
Connector Pin to Connector Pin
CPU
Board
CablefromLEDRoardto CPU Board
LED
Board
SEi!s
CPU Board
JO04 20 JOO1 1
I
Cable from LED Board to CPU
Board
JOO1 1 JOO1 1
IXD Board
JOO1 1
JO02 3
448
Troublahooting