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WhitakerAudio
– Prepare an 18-inch piece of
black
#18 wire. Attach one end of the wire to the ground lug
on ac line filter FL51. Solder. Attach the other end of the wire to one of the available lugs
at the main ground point. Do not solder.
– Find varistor VR53. Place a 1-inch long piece of insulation on each lead. Use insulation
striped from a section of #18 black wire.
Metal oxide varistor (MOV) VR53 is used to prevent potentially damaging transient
disturbances on the ac line from entering the amplifier chassis. While the best location to do this is
directly across the ac input connector on the back panel, the possibility of failure of the MOV
must be considered. It is possible that following exposure to repeated high-energy surges, the
MOV could fail in a short circuit. For that reason, VR53 is connected after circuit breaker CB51.
In order to facilitate installation of this device with a minimum of lead length, it is necessary to
extend one of the leads of VR53 by a small amount, as detailed in the steps below.
– Cut a 1-inch long piece of #18 black wire. Using a soldering iron and small amount of
solder, tin one end of the #18 black wire, and tin one lead from VR53. Bring the two
tinned wires together and solder, forming a reliable solder bridge.
– Cut a 1-inch piece of small heat shrink tubing. Place over the splice point and process
(heat).
Observe the rear of the ac power connector. There are three terminals. The center terminal is
ground, as marked on the back of the device. One of the remaining terminals is the ac neutral
terminal (denoted by “
N
”) and the other is the ac hot line terminal (denoted by “
L
”).
– Using the primary ac wire included in the AC Power Connector Hardware package,
prepare a 4-inch piece of #16
green
stranded wire. Attach a connector to each end of the
wire.
– Attach one end of the green wire to the
ground
terminal on ac input filter FL51. Connect
the other end of the wire to the ground terminal on ac power connector. It may be helpful
to use a pair of long-noise pliers to secure the connector.
– Using the primary ac wire included in the AC Power Connector Hardware package,
prepare a 4-inch piece of #16
white
stranded wire. Attach a connector to one end of the
Summary of Contents for JC Whitaker 20 W Stereo Integrated Audio Amplifier
Page 1: ...20 W Stereo Integrated Amplifier WhitakerAudio 20 W Stereo Integrated Audio Amplifier ...
Page 11: ...11 20 W Stereo Integrated Audio Amplifier Figure 1 1 b ...
Page 16: ...16 WhitakerAudio Figure 1 2 b ...
Page 20: ...20 WhitakerAudio Figure 1 3 Power management circuit for the 20 W integrated stereo amplifier ...
Page 38: ...38 WhitakerAudio Figure 3 1 Component layout for the Amplifier PWB 1 right board ...
Page 40: ...40 WhitakerAudio Figure 3 2 Rectifier PWB component layout ...
Page 45: ...45 20 W Stereo Integrated Audio Amplifier Figure 3 4 Layout of the speaker terminal PWB ...
Page 84: ...84 WhitakerAudio Figure 5 6 Power management PWB a component side b foil side a b ...
Page 188: ...20 W Stereo Integrated Amplifier WhitakerAudio 20 W Stereo Integrated Audio Amplifier ...
Page 196: ...196 WhitakerAudio ...