HP (Hewlett-Packard) 3490A Car Stereo System User Manual


 
FRoM
|
-sv---<*-l---5v
POTVER < W6
SueeLv
|
+rzV
----d-tr-E-
+tzv
W5 NorEr
w7
+5V
-----d-r-b--
+5v
w8
_tZV ___-<--b_
_tZV
7
(HCES)
SERIES SW
H
FROM AI
U9
(I2)
3, t7
FROM
DC AMP
OR
SAMPLE/ IOLO
lp/0
Al
I
MArN
crRcurr
assEMBLY
(o34so-6650r)
l-wz
| |
+:ov
----a-r-r-
+rov
IIWAA
| |
-3ov ----d+-b-
-3ov
c2to
3.3oF
NOTE:
I.AI R2IO,
AIR225, AI
R228.
TEST
POINTS
A,8.
AND
JUMPERS
IV5-W8
LOCATED
ON
AI AI.
2.R2O7 IS 84O5K
iN
OPTION 060 INSTRUMENTS:
looK tN
oPltot{
o50.
3.IF
NOISY
ON
FULLSCAI-E R€ADINGS
ITI
DC
MODE.
CHECK R207,
0206,
rj20r,0207,
AND U202.
4.O2O9
IS VERY NOISY
IF
PINCH.OFF VOLTAGE IS
NOT CORRECT.
SEE PARAGRAPIT 7.3I.
s.IFTHERE
rS NOISE AT LOW INPUT LEVELS
(i.,lOOmV
INPUT ON IOV OC
RANGE}
CHECK
FOR
OEFECTIVE C2O7.
?
(HMT8)
AUTO
ZERO L
'
FROM Uil
{5)
tl
I
I
I
=--
INTEGRATOR
c203
o.33