HP 3320A Operating And Service Manual page 99

REPLACE A2 AND A3 WITH
NEW BOARDS.
REPLACE A2 WITH NEW
BOARD.
NORMAL OPERATION
+YES
IS THERE A SEARCH WAVE·
- - - . . . . - - FORM {SEE FIGURE 1) AT A2
PIN S·.
SET fREQUENCY'" 100 Hz.
t
YES
AT A2 PIN S·, IS THERE A
~CONSTANT DC VOLTAGE BE
TWEEN+1SVAND·6V?
REPLACE A2 WITH NEW
BOARD.
A. DISCONNECT EXTERri'AL
OCSUPPLY.
B. REMOVE A3.
C. PUT A2BACK IN UNIT.
REPLACE A2 WITH NEW
BOARD.
YES
J
D. CONNECT 20MHz FROM
A7PIN1·TOA2PINA~.
E. SET FREQUENCY"
00.000 MHz.
F. CONNECT SCOPE A2
PIN S·.
REPLACE A3 WITH NEW
BOARD.
REPLACE A3 WITH NEW
BOARD.
NO
tYES I tYES
A. PUT A3 BACK IN UNIT. ----........... AAS",,,','A'",',S, 1',.0 A2 AND A3
~
REMOVE BOTH A2 AND A3. ----II------ ARE INPUTS TO A2 AND A3
B. REMOVE A2 FROM UNIT. " AS IN TABLE 2?
A. REMOVE A2.
B. SET EXTERNAL DC SUP·
PLYTO ·6VOLTS
C. CONNECT THE EX
TERNAL DC SUPPLY TO A2
PIN S~. AT OUTPUT IS:
FREQUENCY..; 13.00MHz
O. SET FREQUENCY ~ WHEN EXTERNAL POWER
12.99 MHz. -----.....-- SUPPLY IS AT -6VOLTS.
>14.00 MHz WHEN EX·
TERNAL POWER SUPPLY IS
AT+6VOLTS.
t
NO
E. RECORD 3320 OUTPUT
F REOUENCY WITH EX·
TERNAL POWER SUPPL Y SET
TO -6 V.
F. RECORD 3320 OUTPUT
FREQUENCY WITH EX
TERNAL POWER SUPPLY SET
TO +6V
NEW REPLACE A21 WITH
BOARD. SEE NOTE 1.
tYES
A. TURN LINE ON/OFF TO
OFF.
PROBLEM IN FLEXIBLE
CABLE ORA13.
USE THIS PATH IF BOTH AM
PLiTUDE AND FREQUENCY
ARE BAD.
B, REMOVE THE CONTROL
LER END OF THE FLEXIBLE
PLASTIC CABLE (W2) WHICH
CONNECTS THE FRONT PAN
EL TO THE CONTROLLER.
CD
C.USE LOGIC PROSE OR
....---;__-
g~~~~~~R C~~S~REE~SU~~
GROUND FOR EACH FRE
OUENCY SETTING AND PIN
NUMBER IN TABLE 3. MAKE
MEASUREMENTS BETWEEN
CHASSIS GROUND AND THE
APPROPRIATE PIN ON THE
CONNECTOR
D. ARE SWITCH CLOSURES
ASSHOWN lNTABLE 3?
t
NO
NO
REPLACE A4 WITH NEW
BOARD.
REPLACE A3 WITH NEW
BOARD.
REPLACE AS WITH NEW
BOARD.
t
YES
CHECK SWITCH LOGIC ON
----~
....-
tnE~~r~~~O~ONAI~OTA~~~
\?
REPLACE AS WITH NEW
BOARD.
REPLACE A3 WITH NEW
BOARD.
REPLACE A4 WITH NEW
BQARD.
SET FREQUENCY
~
11.1 kHz.
t>--
.~-----
t
NO
j
tYES
+
YES
TYES
AT OUTPUT ODES COUNTER
NO
~~~C~Oi~~TRCHBO~OR~.C A~~ ~
REMOVE A4 FROM 3320A! _ _. . -_ _
~~~C~O~~~CHBO~OR~.CA~~
NO
READ 90.090jAS! Ins? - - - - - - - LEVELS AS SHOWN IN TABLE 3320B lEVELS AS SHOWN IN TABLE - - - - - .
1? P
SET F R E QUE N C Y ~
111.0QKHz
I
SET FREOUENCY" 11.1 KHz.
Ls
AT OUTPUT ODES COUNTER
NO
~~iC~oi~~~CHBO~OR~.C A~~
_
N_~_
R'MOV' A5 FROM 3310A/
READ 900.901 jJS! ails?
- + - -
LEVELS AS SHOWN IN TABLE - - - - - - - - 33208.
\?
GO TO AMPLITUDE SECTION
TROUBLESHOOTING TREE
t
YES
AT OUTPUT DOES COUNTER
~ ~~iC~O~~~~CHBO~OR~.C A~~ ~
REMOVE A3 FROM 3320A/
~~~C~Oi~~~CH80~OR~CA~~
NO
READ 1.11 MHz" 11 Hz? LEVELS AS SHOWN IN TABLE 3320B. LEVELS AS SHOWN IN TABLE ------.....-...
1? 1?
I
SET FREQUENCY"1.11 MHz REPLACE A4 WITH NEW REPLACE A4 WITH NEW
j
'OARO.
+
YES
'OARO.
+YES
T
YES
AT OUTPUT DOES COUNTER NO
~~~C~O~~~~CHBO~QRGri.C A~~ ~
REMOVE A4 FROM 3320A! _ _ _ _ . - -
~~~C~Oi~~~CHBO~ORGri.CA~~
NO
READ 111.00 KHz ± 1.0 Hz?
----+---
LEVELS AS SHOWN IN TABLE 3320B. LEVELS AS SHOWN IN TABLE
-'-'---;--~
11 1?
~~~g:: t06A~~DI~~~CSEL6~: ~
GO TO AMPLITUDE SECTION
NOTE: SIGNAL MUST BE AM TROUBLESHOOTING TREE.
PLlFIEO BEFORE COUNTER
CAN READ IT. USE 461 WITH
40dB GAIN
AT A6Jl,IS:
F R E QUE N C YON
C 0 U N T E R
20.001222 MHz
AMPLITUDE 100 mV TO
800mV p.p DC OFFSET'"
o
VOLTS
ENTER HERE
SET FREOUENCY= 1.11 KHz
1
YES
F REO U E N C Y
f
1222,00 Hz
VERN OUTNERN IN TO - - - - - - - - - -
~~20U~~~.j3~~~~On~~TER
VERN OUT.
AMP LIT U 0 E
+20.00dBm.
SET 3320A{3320B CONTROLS
TO:
NOTE
1. IF YOU ARE TROUBLE
SHOOTiNG 3320B OPTION
007, GO TO TABLE4
3320A-D~2570
REPLACE A3 WITH NEW
BOARD.
PROBLEM IN FLEXIBLE
CABLE OR A13.
AT A2PIN A·IS:
A2 FROM
~ 1~~:~iTU~.E2~4~Oe;L\sb~ ~ :~~~~CE
A2 WITH NEW
OFFSET
REPLACE A3 WITH NEW
BOARD
REPLACE A 10 WITH NEW
BOARD.
AT A6Jl IS:
F R E QUE N C YON
FROM
~ ~0.~Ol~2~H~
E R " - - . . . . . . - -
:~~:~~:lStITCHLOGICAS_Nc:;O,--..~
.,
AMPLITUDE'" 200 mV TO
900 mV p.p WITH + 0.5 VOLTS
DC OFFSET
REPLACE A21 WITH NEW
BOARD. SEE NOTE 1
t
YES
A. TURN LINE ON/OFF TO
OFf.
REPLACE A4 WITH NEW B. REMOVE THE CONTROL.
BOARD. LER END OF THE FLEXIBLE
+
PLASTIC CABLE (W2) WHICH
CONNECTS THE FRONT PAN
YES
EL TO THE CONTROLLER
~3'20:/~j20tS
BACK IN CHECK SWITCH LOGIC ON
NO
CD
C. USE LOGIC PROBE OR
CD
~t~~E~~r~~~O~ONAI~OTA~~~ -..----------------_---;~___.~- g~~~~~~R C~~SUMRE:SSU~~
- .......
>--------------1--------------------
B. REMOVE A4 FROM 1? GROUND FOR EACH FRE
3320A/3320B. QUENCY SETTING AND PIN
NUMBER IN TABLE 3. MAKE
MEASUREMENTS BETWEEN
CHASSIS GROUND AND THE
APPROPRIATE PIN ON THE
CONNECTOR
D. ARE SWITCH CLOSURES
AS SHOWN IN TABLE 3?
t
NO
REM 0 V E AID
3320A!3320B
REPLACE A3 WITH NEW
BOARD
REPLACE AS WITH NEW
BOARD
REPLACE AS WITH NEW
+
YES
BOARD.
+
YES
AT A4PINB'IS'
FREQUENCY ON COUNT
NO
CHECK SWITCH lOGIC ON
AS FROM
---o~-
ER"'32.22MHz±122Hz
_----<~
_ _
A19 MOTHER BOARD. ARE
AMPLITUDE"'200mV TO LEVELS AS SHOWN IN
1.4V p.p WITH +2.4VOLTS TABLEl?
DC OffSET?
REPLACE A4 WITH NEW
BOARD.
t
YES
AT A3PIN 3·IS:
FREQUENCY ON CDUN
A 4 FRO M
_-..~_- TE:;p3l21·n~El~~~~
mV TO
800 mV p.p WITH + 10 VOLTS
OCOFFSET?
REMOVE
3320A!3320B.
NO
J
NO
REPLACE A3 WITH NEW
BOARD.
t
YES
REMOVE A3 FROM 3320A! _ _...._ _
~~iC~o~~~~C~O~~~I.CA~~ ~Nc:0:..-------------------------------------------------
__
..I
3320B. LEVELS AS SHOWN IN
TABLE 1?
fES
SET FREQUENCY 1222 Hz,
t
AT A4P1N 3"IS: AT AS PIN 3" IS:
FREQUENCY ON COUNT FREQUENCY ON COUNT
ERA"'M3#l~i~~~; 11ll ~~.
TO
--'.:YE:.::Se,~~-
E
RA~~~ii~6~ ~~~O±~~.2 ~~
400mV p-p WITH +9.6 VOLTS B[)O mV Pop WITH
DC OFFSET? + 2.40 VOLTS DC OFFSET?
oVOlTS
AT A6JlIS:
FREOUENCY '" 32.22 MHz
~2E2~ M~z~
E QUE N C Y '" ------.......--!
~~~~iTUOE
'" 100 mV TO
500 mV p.p WITH 0 VOLTS DC
OFfSET?
SEARCH WAVEFORM
"MADE WITH.;. 10 PROBE.
~IF THERE IS AN· BY APIN
NUMBER, THE MEASURE
MENT IS TO BE MADE ON
A19(MOTHER BOARD)
1·· VOLTS/DlV·0,2
INPUT ·D.C. COUPLED
SWEEPMOOE·AUTO
SYNC SOURCE . INTERNAL
TIME/DIV -
1
MSEC
Figure 7-3. Frequency Generating Section Troubleshooting Tree.
7-7/7-8