Parks 915-BL, Operating & Service Manual

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Parks Medical Electronics, Inc.
Aloha, Oregon U.S.A.
Maintenance and Service
Replacing the Fuse
If the Doppler will not turn on (see Trouble Shooting Guide 1.1), and replacing the battery does not solve
the problem, the fuse may need to be replaced.
To Replace the Fuse:
Be sure the instrument is turned off. 1.
Open the case by removing the four corner screws. 2.
Carefully remove the circuit board assembly. 3.
Refer to F1 on the 4. Parts Location Diagram to fi nd
the location of the fuse, or see accompanying
photo.
Replace with a 1 A FAST fuse, Parks part #865-
5.
6001-00.
Carefully replace the circuit board assembly in the
6.
case.
Replace the four corner screws.
7.
Technical Support and Service
If following the troubleshooting guide does not correct the problems you are experiencing with the
Doppler, call technical support at Parks Medical Electronics, Inc.
Should this Doppler require technical service, Parks recommends that the instrument be returned to the
factory. Parks will ensure that electrical components meet the company’s standard of performance.
Follow the instructions in the accompanying illustration to 7.
position and secure the new battery.
Gently reconnect the red wire
fi rst and then the black 8. wire.
Caution:
Failure to match wire and terminal colors will
do permanent damage to the instrument.
Carefully replace the circuit board assembly in the case.
9.
Replace the four corner screws. 10.
Replacing the Battery
This device uses a 12V, 1.2 Ah sealed lead acid rechargeable battery for its power source. Replace with
Parks Part # 854-0017-01.
Caution:
Replace only with the same size sealed lead-acid rechargeable battery. The use of a larger
battery could cause the terminals to come in contact with the circuit board or metal case. Never allow
battery terminals to come into contact with any metal part of the instrument. This could result in fire or
internal damage to the instrument.
To Replace the Battery:
1. Be sure the instrument is turned off
and the charger is disconnected.
Open the case by removing the four
2.
corner screws.
Carefully remove circuit board
3.
assembly from the case.
Locate the battery and note how the
4.
battery wires are connected.
5. For safety reasons, disconnect the
black battery wire fi rst and then the
red wire. Wiggle and gently pull the
connectors, being careful not to break
the insulation or short to ground.
The battery is mounted to the panel
6.
with adhesive. Gently pry or cut the
battery loose.
1.
Position battery with
positive terminal next
to front panel, so both
wire leads reach
battery terminals.
2.
Center and attach
battery
1/8”
from
edge of circuit
board with two
strips of two
layered double
sided tape.
3.
Use single
strip of tape
for padding.
Attach tape to
battery, but do
not remove top
plaid covering.
1/8”