Figure
62
DC Power Status LEDs
d.
If the DC Indicator LEDs are not on, suspect the main power supply module or front
panel switch. The power supply
(0950-4729) terminal connections should also be
verified with a DVM. Verify the voltages on the power supply label.
e.
If rear panel or deck fans is are not operating and the DC Indicator LEDs are
on
;
replace fan.
Figure
63
Test Set Diagram
PS1 650W
DC Power Supply
Test Set Control Bd.
PCB 1
12 / 15vdc
S100
-12 / -15vdc
+24vdc
3 / 5vdc
PIN Switch Driver Bd.
PCB2
Test Set
Interface
Pass Thru
Interface
J1
J4
J2
J3
J9
Ext. DUT
Control
J11
J12
J13
AC Line
Filter Assy
FS2
–
FS3
AC
IN
S101
S200
J2
J1
P1
Active ON
LED (Frt.Pnl)
J16
J5
FAN
J15
Std.By
FS1
AC IN
*
**
PCB7
Ports 8,12,16 LED (Frt.Pnl)
J6
J7
J8
PCB6
Ports 7, 11, 15 LED (Frt.Pnl)
PCB5
Ports 6, 10, 14 LED (Frt.Pnl)
PCB4
Ports 5, 9,13 LED (Frt.Pnl)
S201
S300
S301
S401
Front Panel
Active
9 / -10vdc
Signal Path Name
Test Set Port Group
Ext Control Bd.
PCB3
(5, 15, -15vdc)
(3, 5, -12, 12, -15 15 Vdc)
-12 Vdc
(5 Vdc)
(5,15,-15 Vdc)
NOTES:
*
The dc voltages shown, are functionally used by this part.
**
On board programmed Device.
*
*
*
*
*
(5 Vdc)
*
(5 Vdc)
*
(5 Vdc)
*
(5 Vdc)
S400
Source ---- Receiver
----- 5
–
9
–
13 -----
Source ---- Receiver
----- 6
–
10
–
14 -----
Source ---- Receiver
----- 7
–
11
–
15 -----
Source ---- Receiver
----- 8
–
12
–
16 -----
RF PIN Switch (+ 15Vdc)
Keysight U3042AE12
12-Port Test Set
10 MHz
–
26.5 GHz
*
Jx09-x12
Opt 001/002 RF Amp Bias (15Vdc)
*
J17
SW Fans x4
-12 Vdc
*
J18
N.C.
J100
J101
J200
J201
J300
J301
J401
J400
JTAG
N.C.
**
**
**
**
2
1
4
3
C
J1
RF PIN Switch
Port Layout
Port LEDs
78
U3042AE12 User's and Service Guide