HP 3478A Technical Manual page 63

Mfr. Mfr.
N N o o . .
0 0 0 0 4 4 9 9 D D
0 0 1 1 1 1 2 2 1 1
0 0 1 1 2 2 9 9 5 5
0 0 1 1 9 9 2 2 B B
0 0 3 3 8 8 8 8 8 8
0 0 4 4 7 7 1 1 3 3
0 0 6 6 6 6 6 6 5 5
0 0 7 7 2 2 6 6 3 3
0 0 7 7 7 7 1 1 6 6
1 1 1 1 2 2 3 3 6 6
1 1 2 2 9 9 6 6 9 9
1 1 4 4 9 9 3 3 6 6
2 2 4 4 3 3 5 5 5 5
2 2 4 4 5 5 4 4 6 6
2 2 7 7 0 0 1 1 4 4
2 2 8 8 4 4 8 8 0 0
5 5 6 6 2 2 8 8 9 9
7 7 5 5 9 9 1 1 5 5
designator column are available only for repair and designator column are available only for repair and
service of Hewlett-Packard Instruments. service of Hewlett-Packard Instruments.
5-12. 3478A 5-12. 3478A DISASSEMBLY DISASSEMBLY PROCEDURE
5-13. The following is the 5-13. The following is the disassembly procedure for
3478A. 3478A.
a. a. Refer Refer to to Figure 5-2. Figure 5-2. Loosen t
3478A's top cover (MP6). 3478A's top cover (MP6). Turn the instru
loosen the screw on loosen the screw on the bottom cover (MP10). the bottom cover (MP10).
b. b. Remove the Remove the bottom cover bottom cover by pulling
toward the rear of the 3478A and away from the toward the rear of the 3478A and away from the
multimeter. multimeter.
c. c. Turn t Turn the 34 he 3478A r 78A right
cover by pulling the cover toward the rear of the 3478A cover by pulling the cover toward the rear of the 3478A
and away from the multimeter. and away from the multimeter.
d. d. See Figure 5-6 Se e Figure 5-6. .
panel wires from clamp MP26. panel wires from clamp MP26.
e. Se e. See Figure 5-4. e Figure 5-4. Loosen and
on both the left and right side side covers (MP4). on both the left and right side side covers (MP4).
Remove the covers. Remove the covers.
f. f. Refer Refer to to Figure 5-5. Figure 5-5. Loosen and remove screws
MP21 on MP21 on the bottom p the bottom plastic shield (MP23) lastic shield (MP23). . Remove the
shield. shield.
g. g. Refer Refer to to Figure 5-4. Figure 5-4. Loosen and remove screws
MP17 on the left side frame of the 3478A. MP17 on the left side frame of the 3478A.
h. h. Refer Refer to to Figure 5-4. Figure 5-4. Loosen and remove screws
MP17 at the 3478A's side frames (on both the left and MP17 at the 3478A's side frames (on both the left and
right side). right side). Remove the Remove the side frames.
Table 5-2. Code List of Table 5-2.
M M a a n n u u f f a a c c t t u u r r e e r r N N a a m m e e
U U n n i i t t e e d d C C h h e e m m i i c c o o n n I I n n c c
A A l l l l e e n n - - B B r r a a d d l l e e y y C C o o
T T e e x x a a s s I I n n s s t t r r I I n n c c S S e e m m i i c c o o n n d d C C m m p p n n t t D D i i v v
R R C C A A C C o o r r p p S S o o l l i i d d S S t t a a t t e e D D i i v v
K K D D I I P P y y r r o o f f i i l l m m C C o o r r p p
M M o o t t o o r r o o l l a S a Se e m m i i c c o o n n d d u u c c t t o o r P
P P r r e e c c i i s s i i o o n n M M o o n n o o l l i i t t h h i i c c s s I I n n c c
F F a a i i r r c c h h i i l l d d S S e e m m i i c c o o n n d d u u c c t t o o r r D D i i v v
T T R R W W I I n n c c B B u u r r l l i i n n g g t t o o n n D D i i v v
C C t t s s o o f f B B e e r r n n e e I I n n c c
U U n n i i t t r r o o d d e e C C o o r r p p
G G e e n n e e r r a a l l I I n n s s t t r r C C o o r r p p S S e e m m i i c c o o n n P P r r o o d d G G p p
A A n n a a l l o o g g D D e e v v i i c c e e s s I I n n c c
C C o o r r n n i i n n g g G G l l a a s s s s W W o o r r k k s s ( ( B B r r a a d d f f o o r r d d ) )
N N a a t t i i o o n n a a l l S S e e m m i i c c o o n n d d u u c c t t o o r r C C o o r r p p
H H e e w w l l e e t t t t - - P P a a c c k k a a r r d d C C o o C C o o r r p p o o r r a a t t e e H H q q
S S p p r r a a g g u u e e E E l l e e c c t t r r i i c c C C o o
L L i i t t t t l l e e f f u u s s e e I I n n c c
PROCEDURE
disassembly procedure for the
Loosen the screw he screw on t
Turn the instrument over and ment over and
by pulling the cover the cover
ight side u side up. p. Remove Remove the
Remove Remove the the front front and
Loosen and remove th remove the screws
Loosen and remove screws
Remove the
Loosen and remove screws
Loosen and remove screws
side frames.
Code List of Manufacturers Manufacturers
r Pr r o o d d u u c c t t s s
i. i. Unplug the
Trigger, and Rear Panel Terminal Cables from the Trigger, and Rear Panel Terminal Cables from the
mother board (A1 assembly). mother board (A1 assembly).
j. j. Carefully remove the rear frame
the panel (MP7) by pulling the frame toward the rear and panel (MP7) by pulling the frame toward the rear and
away from the instrument. away from the instrument.
on the he k. k. Refer
screwdriver, insert the screwdriver blade into one slot of screwdriver, insert the screwdriver blade into one slot of
the top trim (MP29) the top
and remove screws MP20 from the top side of the front and remove screws MP20 from the top side of the front
frame (MP13). frame (MP13).
l. l. Refer
the bottom side of the front frame (MP13). the bottom side of the
the top top
m. Remove the m.
frame toward the rear and away from th frame toward the re
careful that the casting does not get tangled up in the careful that the casting does not get tangled up in the
and rear rear wires going to the front and rear terminals. wires going to the front and rear terminals.
n. n. Refer
e screws MP32 (also see Figure 5-8 MP32 (also see
bracket (MP33) and remove the bracket. bracket (MP33) and remove the bracket.
o. o. Unplug the cable
p. p. Refer
MP34 from t MP34 from the front pan
panel assembly from the mother board (A1 assembly). panel assembly from the mother board (A1 assembly).
This completes the d This completes
display is to be removed, continue with the next step. display is to be removed, continue with the next step.
q. q.
loosen and remove screws MP32 (see loosen and remove screws MP32 (see Figure 5-8)
the front the front panel
completes the front panel disassembly. completes the front panel disassembly.
5-2 5-2
A A d d d d r r e e s s s s
M M i i l l w w a a u u k k e e e e W W I I 5 5 3 3 2 2 0 0 4 4
D D a a l l l l a a s s T T X X 7 7 5 5 2 2 2 2 2 2
S S o o m m e e r r v v i i l l l l e e N N J J 0 0 8 8 8 8 7 7 6 6
W W h h i i p p p p a a n n y y N N J J 0 0 7 7 9 9 8 8 1 1
P P h h o o e e n n i i x A x AZ 8 Z 85 5 0 0 6 6 2 2
S S a a n n t t a a C C l l a a r r a a C C A A 9 9 5 5 0 0 5 5 0 0
M M o o u u n n t t a a i i n n V V i i e e w w C C A A 9 9 4 4 0 0 4 4 2 2
B B u u r r l l i i n n g g t t o o n n I I A A 5 5 2 2 6 6 0 0 1 1
B B e e r r n n e e I I N N 4 4 6 6 7 7 1 1 1 1
W W a a t t e e r r t t o o w w n n M M A A 0 0 2 2 1 1 7 7 2 2
H H ic ick k s s v v il ill l e e N N Y Y 1 1 1 1 8 8 0 0 2 2
N N o o r r w w o o o o d d M M A A 0 0 2 2 0 0 6 6 2 2
B B r r a a d d f f o o r r d d P P A A 1 1 6 6 7 7 0 0 1 1
S S a a n n t t a a C C l l a a r r a a C C A A 9 9 5 5 0 0 5 5 1 1
P P a a l l o o A A l l t t o o C C A A 9 9 4 4 3 3 0 0 4 4
N N o o r r t t h h A A d d a a m m s s M M A A 0 0 1 1 2 2 4 4 7 7
D D e e s s P P l l a a i i n n e e s s I I L L 6 6 0 0 0 0 1 1 6 6
Unplug the HP-IB, Volt HP-IB, Voltmeter Complete,
Carefully remove the rear frame (MP18) and rear
Refer to to Figure 5-6. Figure 5-6. Using
trim (MP29) and remove t and remove the trim.
Refer to to Figure 5-5. Figure 5-5. Loosen Loosen screws
front frame (MP13).
Remove the front frame (M front frame (MP13) by
ar and away from the instrument.
Refer to to Figure 5-7. Figure 5-7. Loosen and remove screws Loosen and remove screws
Figure 5-8), from the bottom front panel ), from the bottom front panel
Unplug the cable from the from the display.
Refer to to Figure 5-7. Figure 5-7. Loosen and remove screws Loosen and remove screws
he front panel connector. el connector. Remove the front
the disassembly o isassembly of the
To remove the d To remove the display isplay from the
panel assembly. assembly. Remove Remove the
TM 11-6625-3071-14 TM 11-6625-3071-14
meter Complete, External External
(MP18) and rear
Using a a small small flat flat blade blade
he trim. Then loosen Then loosen
screws MP20 MP20 from from
P13) by pulling the pulling the
e instrument. Be Be
display.
Remove the front
f the 3478A. 3478A. If the If the
from the front p front panel, anel,
Figure 5-8) from from
the display. display. This This