HP 3320A Operating And Service Manual page 97

~~ ~B2~1~~;, ~S2~~~~U~~:
_N_O
..,~_---------
REMOVE A9 BOARD fROM
PlITUOE • 840 mV p.p, DC UNIT.
OffSET' + 1.25 VOLTS?
GO TO fREOUENCY GENER·
ATiNG SECTION, TROUBLE·
SHOOTING.
L
AT AB PIN 3' (20 MHz). IS
fREOUENCY' 20 MHz
± 200 Hz, AMPLITUDE = 1 V
p.p, DC OffSET =1.25
VOLTS.
r-
REPLACE AB WITH NEW
BOARD.
REPLACE A9 WITH NEW
BOARD.
L
DETERMINE fAULTY
BOARD AND REPLACE A4
OR AS.
Yes
1... 10 kHz SIGNAL
SCOPE SETIINGS
T1NE/OIV = 50.s/CM
VOL TS/OIV' 0.05 VOLTS/OIV
VERT. INPUT . OC COUPLED
SLOPE +
ACf
INTERNAL TRIGGER
@Al PIN M (10 kHz)
r
L
REPLACE Al WITH NEW
BOARD.
REPLACE AT WITH NEW
BOARD.
REPLACE All WITH NEW
BOARD.
REPLACE AS WITH NEW
BOARD.
L
AT AT PIN 10' (2 MHzI,lS
a. fREQUENCY = 2 MHz
REMOVE All fROM 3320B.
--.~---
± 20 Hz?
b. AS IN fiGURE 3, BUT
4.2 V pop?
REPLACE Al WITH NEW
BOARD.
r
AT AS PIN 14",IS fREQUEN·
CY
:=
18 MHz
±
180 Hz. AM·
PLITUDE
:=
260 mV p.p, DC
OfFSET = 0 VOLTS'
REPLACE AB WITH NEW
BOARD.
r
REPLACE Al WITH NEW
BOARD.
REPLACE A2 WITH NEW
BOARD.
L
AT AT PIN IS'
11
MHz). IS No
~11N~L
PIN 15'
11
MHz) IS
~.IG1N:~Z'±
10 Hz?
~""--..;~---
REMOVE Al FROM UNIT.
---1~_--
a. 1 MHz ± 10 Hz?
b. AS IN fIGURE2'
~O~~~~.:~GURE
2 ONLY 3.9
""' " ,L·
t"
_Y_e_s-l~ ~g_NI~~~z)SCOPE
TO AT PIN
_-I~_-- ~'. S~GR~':iU~SNI~/IG=Uf~~; :6~~~CE
AT WITH NEW
± 20 Hz'
t
No
j
Yes
AT AT PIN 10" (2 MHz), IS
REMOVE AT fROM SIGNAL
3320A/3320B.
--I~---
a. 2 MHz ± 20 Hz?
b. AS IN fiGURE 3, BUT
4.2 V p-p?
L
AT Al PIN M-1l0 kHz)
a. ODES F VARY fROM
_-I~ __- 10.000 kHz TO AT LEAST
10.003 kHz?
b. IS SIGNAL AS IN fiGURE
11
~~ ~5tiNM~4;,;SI~~~~,U~~
No
~
PlITUOE 400 mV p.p, DC
OffSET=OVOLTS'
SET VERN INIVERN OUT TO
VERN IN. TURN VERNIER
THROUGH fULL RANGE
WHILE MONITERING fRE·
OUENCY AT PIN M. ODES
FREQUENCY VARY fROM
10.000 kHz TO AT LEAST
10.003 kHz.?
REMOVE A2 fROM
3320A/3320B.
No
No
ENTER HERE
Yes
AT Al PIN M'(10 kHz). ODES
~~NN:g S~~~~ T?N7J:~~
_ _
~_-- ~OlUn~T~~PL~gO~ ~~Ol:;'
OUT TO VERN OUT. fiGURE 11
2 MHz SIGNAL
SCOPE SETTINGS
TIME/DIVISION = 0.2.s10IV
VOLTS/DIVISION = 0.05 VO LTS/OIV
VERT. INPUT . DC COUPLED
MODE· AUTO
SLOPE +
ACf
INTERNAL TRIGGER
2." 1 MHz SIGNAL
TIME/DIVISION = 0.5",/OIV
VOLTS/DIVISION = 0.05 VOLTS/OIV
VERT. INPUT· DC COUPLED
MODE· AUTO
SLOPE +
ACf
INTERNAL TRIGGER
3."
o
VOLTS
"AT PIN 15( 1 MHz)
3320A- 0 - 2564
@ATPIN 10 (2 MHz)
...All made with.;. 10 probe.
'If THERE IS AN ASTERISK
BY A PIN NUMBER, THE
MEASUREMENT IS TO BE
MADE ON THE MOTHER
BOARD (AI9) .
Figure 7-2. Reference Frequency Troubleshooting Tree.
7-5/7-6