HP 3320A Operating And Service Manual page 101

NORMAL OPERATION.
j
L
REPLACE All WITH NEW
BOARO.
r
_ _ --1~--- ~MS~UTPUT :
3.41 VOLTS
L
SET AMPLITUOE
+23.66 dBm.
o
_ _
--1~~--- ~MS~UTPUT
: 5.00 VOLTS _ _ --1 ..
~ ---
REMOVE All FROM 3320B. _ _
.~--- ~:~L~~~IC
LEVELS AS IN
SET AMPLITUOE
+ 26.99 dBm.
r
REPLACE A10 WITH NEW
BOARO.
REPLACE A9 WITH NEW
BOARO.
AT A9 PIN
J
IS,
REMOVE A10 FROM 3320B. _ _
.~_-_
FREOUENCY
=
20 MHz
± 100 Hz;
AMPlITUOE
=
504 mV p.p?
NOTE
1. IF THE UNIT YOU ARE
TROUBLESHOOTING IS
3320B OPTION 007 (GPIB) ,
YOU 00 NOT HAVE A21. RE·
PLACE A24 WITH NEW
BOARO.
I
OISCO NECT BROWN WIRE
ATTO OF A10.
NOTE, BE SURE TO CON· AT SELECTRO ON TQP OF
N E C T
S COP E ---1~"""--AlO, PERIOO : 100",
± 1 ns;
g~~~~g/~lOMETAL
AMPlITUOE: 2.6 V p.p?
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REPLACE AlO WITH NEW
BOARO.
REPLACE A14 WITH NEW
BOARO.
YES
A9 PIN J IS'
FREQUENCY 200 MHz
_Y_E-lS~-"'--4~- ~~~~~tOE:
225 mV pp'
NOTE, BE SURE TO
GROUNO SCOPE
A10 PIN 1.
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REPLACE A2l WITH NEW
BOARO. SEE NOTE 1.
PROBLEM IS IN FRONT PAN·
EL SWITCHES (A13) OR IN
FLEXIBLE CABLE.
r
REPLACE A12 WITH NEW
BOARO.
AT A12TP3 IS VOLTAGE: 0 V
OC TO· 1 V OC?
REPLACE A12 WITH NEW
BOARO.
USE THIS PATH IF OUTPUT AT A12TP3 IS THE VOLTAGE
IS LESS THAN
5.0 VOLTS ---4~~-- GREATER THAN 5.5 VOLTS
RMS. DC?
USE THIS PATH IF OUTPUT YES
IS GREATER THAN 5.0 ~
VOLTS RMS.
IS VOLTAGE AT Al1TPl +7.9
VOLTS OC?
A. TERMINATE OUTPUT IN
50 OHMS.
B. CONNECT OC VOLT
METER TO OUTPUT.
C SET AMPlITUOE :
+
26.99 dBm.
O. RECONNECT ALL A12
SELECTRO CABLES.
YES
REPLACE A9 WITH NEW
BOARO.
REPLACE A15 WITH NEW
BOARO.
A. TURN LINE ON OFF TO
OFF.
B. REMOVE THE CONTROL·
LER ENO OF THE FLEXIBLE
PLASTIC CABLE IW2) WHICH
CONNECTS THE FRONT PAN·
CHECK THE LOGIC LEVELS EL TO THE CONTROllER.
ON THE CONNECTOR FROM
0
C. USE LOGIC PROBE OR
--~~
_ _ WHICH A15 WAS REMOVEO. - - . _....
_~_
OHM METER TO MEASURE
---l"~--
ARE LOGIC LEVELS AS IN
ARE THEY AS SHOWN IN CONTACT CLOSURES TO TABLE 3'
TABLE 2' GROUND FOR EACH AMPlI·
TUOE SETTING ANO PIN
NUMBER IN TABLE 3. MAKE
MEASUREMENTS BETWEEM
CHASSIS GROUNO ANO THE
APPROPRIATE PIN OF w2
CONNECTOR.
L
r
PUT A9 BACK IN 3320B. - -.. ~---
REPLACE A15 WITH NEW
BOARO.
REMOVE A15 BOARO FROM
LOGIC CONNECTOR.
CHECK THE LOGIC LEVELS
ON THE CONNECTOR TO
-~~~--WHICH
A15 IS CONNECTEO.
ARE THEY AS SHOWN IN
TABLE 2'
o
L
SET AMPLITUOE
·65.00 dBm.
_Y_E--I
S
""",,_ _
~g~~~CE
All WITH NEW
_ _ _ _ _ _ _ _t
Lo
r
SET AMPLITUOE
+ 25.00 dBm.
REMOVE All FROM 3320B.
ARE LOGIC LEVELS AS IN
TABLE 1?
- -...- - IS OUTPUT .0039 V RMS'
YES
YES
j
L
r
CHECK THE LOGIC LEVELS
ON THE CONNECTOR TO
0
IS SIGNAL 24B mV RMS'
--------1---....---.--
WHICH A15 IS CONNECTEO.
~
ARE THEY AS SHOWN IN
TABLE 2?
ISVOLTAGE+ 7.9 VOLTS'
--_-------j--------------------------------------'_--..
CONNECT DC Vm to Al1TPl.
CONNECT AC VOLTMETER
TO REAR.
OC· 13 MHz
LOW LEVEL OUTPUT.
IS VOLTAGE AT OUTPUT 3.97
VOLTS RMS?
SET AMPLITUOE
·35.00 dBm.
r
,", , " " " ' . '""''' L,
~32g~SCONNECT
ALL SELEC-
--;~
......--ISAllTP1:+ 7.9 V OC'
_Y_E_S_~~-_
PUT A12 BACK IN 3320B. - -..
~_--
ISAllTPl + 7.9V OC?
TRO CABLES INTO A12.
C. REMOVE A9 FROM 3320B.
ENTER HERE
SET, AMPlITUOE TO 25.00
dBm.
FREQUENCY TO
10.00 kHz.
--.~---
LEVELING ON.
CONNECT 50 OHM
LOAO TO OUTPUT.
REPLACE A12 WITH NEW
BOARO.
3320A- 0-2568
'IF THERE IS AN ASTERISK
BY A PIN NUMBER, THE
MEASUREMENT IS TO BE
MAOE ON THE MOTHER
BOARO (A191.
Fig~re
7-4. Amplitude Section Troubleshooting Tree.
7-9/7-10