T h e following procedures are designed to assist in the
isolation of malfunctions.The operations described
should be undertaken only after an investigation of all
external connections and adjustments has indicated,
beyond reasonable doubt, that the problem is actually
within the unit.
C o m p o n e n t A c c e s s
T h e 5152 contains only one printed circuit board. All
c o m p o n e n t s are mounted directly on the circuit board
with the exception of the output transformer, power
transformer, on/off switch, pilot lamp, level controls,
supply voltage select switch, input and output terminal
strips, mix/override switch and the 9-pin s o c k e t s .
To reach the circuit board for testing, servicing or
input selection, only the top c o v e r must be removed
(eight sheet metal s c r e w s } . R e m o v a l of the circuit
board from the c h a s s i s requires popping out six s n a p s .
V o l t a g e C o n v e r s i o n
T h e 5152 c a n be operated from either a 1 0 0 - 1 2 0 V A C
or 2 0 0 - 2 4 0 V A C , 5 0 / 6 0 Hz s o u r c e . T h e S U P P L Y
V O L T A G E S E L E C T switch, S 3 0 1 , converts the unit
from one operating voltage range to the other. U s e the
following procedures to convert the preamplifier to a
different voltage range:
1. Disconnect the 5152 from the power s o u r c e .
2. Slide the S U P P L Y V O L T A G E S E L E C T switch to the
appropriate line voltage range.
W A R N I N G
T H I S S E C T I O N O F T H E M A N U A L
C O N T A I N S S E R V I C E I N S T R U C T I O N S
F O R U S E B Y Q U A L I F I E D S E R V I C E
P E R S O N N E L ONLY.
3. C h a n g e the line cord and attachment plug to match
the power s o u r c e receptacle or use a 120-to-240 V
adapter (not provided}.The attachment plug a n d / o r
line cord used for 240 V A C m o d e in the U . S . ,
C a n a d a and J a p a n shall be both U . L . listed and
C . S . A . Certified. For use in other countries, line cord
selection should be based on local regulations
governing 2 4 0 V A C 5 0 / 6 0 Hz supply s o u r c e .
U . L . a n d C . S . A . V o l t a g e W i r i n g C o d e
Country Switch, Switch, Ground, Wire
S301, S201, E401 Color
Terminal Terminal
U . S . a n d 1 - - B l a c k
J a p a n - 1 - White
- - Y e s G r e e n
E u r o p e 1 - — B l u e
- 1 — B r o w n
- - Y e s G r e e n / - , oilow
C A U T I O N :
This unit may be d a m a g e d if operated
with the supply voltage select switch set incorrectly
for the line voltage applied.
S e l e c t o r S w i t c h
Table 1 s h o w s the various input s o u r c e s , terminations
and jumper options for the 5152. S e e Figures 2 - 6 for
available interconnections.
T A B L E 1
Input Selector
Transformer
Switch Position
Accessory
Socket Jumper
Termination
Input
Connector
(Internal Adjustment)
Transformer
Connections
Resistor
B a l a n c e d
L o w I m p e d a n c e
Terminal
M I C
5195
N o n e
None
M i c r o p h o n e
Strip
U n b a l a n c e d
High I m p e d a n c e
Terminal
M I C
N o n e
4 - 5
None
M i c r o p h o n e
Strip
7 - 9
P h o n o J a c k s
M I C
N o n e
3 - 9
None
( C h a n n e l 2 only)
B a l a n c e d
High I m p e d a n c e
Terminal
L I N E
5195
N o n e
N o n e
L i n e
Strip
B a l a n c e d
L o w I m p e d a n c e
Terminal
L I N E
5195
N o n e
6 2 0 - o h m
L i n e
Strip
1
/2-watt
B a l a n c e d
L o w I m p e d a n c e
L i n e with 14 d B
Terminal
M I C
5195
N o n e
1 8 0 0 - o h m
E x t r a G a i n
Strip
K-watt
(Input Level L e s s
T h a n - 2 0 d B m }
U n b a l a n c e d
High I m p e d a n c e
Terminal
L I N E
N o n e
4 - 5
None
Line
Strip
8 - 9
P h o n o J a c k s
L I N E
N o n e
3 - 9
None
( C h a n n e l 2 only)
Magnetic
None
P h o n o
P h o n o J a c k s
P H O N O
N o n e
3 - 9
None
( C h a n n e l 2 only]
