Star Tech Journal

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Rock-Ola
477-478-480
Profit Setter Mod
Lower Credit Filter Board
No. 53325-A
PROBLEM:
Track Side
There is a possibility that a small
quantity of Profit Setter Lower
Filter Boards may have been
shipped without the Resonator
Stabilizing Circuit. Without this
change it is possible that the
Profit Setter could fail
intermittently.
Solder new 1 OK
¼W Resistor
(#51293) on
track side.
CJ)
CORRECTION:
Resonator Circuit can be
stabilized by modifying the
Lower Credit Filter Board No.
53325-A as shown in Steps 1, 2
& 3.
c=:)C7Al9
(3)
•
-<::::}-R7A2~
D
Replace original C7A20-1 00MMFD
Capacitor with new value 470MMFD
(#51293)
c::::)C7A20
X7A01
Component
side
Rock-Ola
477-478-480
Power Supply Mod
Metal Film Type
Carbon Type
~
PROBLEM:
On a few Power Supply Regulator
Boards, the unintentional use of
carbon type resistors instead of
the more stable metal film types
at locations R218 and R219 may
cause a shifting of the +9.6 volts
D.C. from its initial setting. This
effect, which is due to
temperature changes may cause
such malfunctions as:
• Mechanism scanning
• Repeat playing of the same
record
• Displays not on
• Cofns not credited
• No selections
(N_G.)
R218 P.N. 53349, 267 OHM
1 /2W. Metal Film
R219 P.N. 53348, 1210 OHM
1/2W. Metal Film
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Should these carbon resistors be
present, change them to metal
film type as shown in the
diagrams.
0
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----0-""'
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p
1111
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CORRECTION:
Open track with knife.
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888
o'
~
-GD-- ""-0-.
---oE:}-
c=,m
--cn---WOI
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-c:=:>--
-c::=>-
~ClM
-{).OM
-6, ~
•
1~1
--cEIJ-
--QEQ--
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-0--'-""
-«:}-Clltl
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--0:0-
--@0--
R118
R219