SAFETY INFORMATION
Warning
Any person performing service of this unit will be exposed to
hazardous voltages and the risk of electric shock. It is
assumed that any person who removes the amplifier from this
cabinet has been properly trained in protecting against
avoidable injury and shock. Therefore, any service
procedures are to be performed by qualified service personal
ONLY!
Caution
This unit does not have a power switch. Hazardous
voltages are present within the unit whenever it is
plugged in.
Before the amplifier is plugged in, be sure its rated voltage
corresponds to the voltage of the AC power source to be
used. Incorrect voltage could cause damage to the amplifier
when the AC power cord is plugged in. Do not exceed rated
voltage by more than 10%: operation below 90% of rated
voltage will cause poor performance or may shut the unit off.
List of Safety Components Requiring
Exact Replacements
F1
Fuse SLO BLO 0.50A 250V 20mm.**
UL approved
PWRCORD SPT-2 or better with polarized plug, UL
approved wired with the hot side to fused side.
Use with factory replacement panel strain relief
only.
T1
Transformer. Use only factory replacement.**
DBR or D001 Bridge diode. Use only factory replacement.
C1, 2
3300uF, 50V electrolytic filter caps. Be sure
replacement part is at least the same working
voltage and capacitance rating. Also the lead
spacing is important. Incorrect spacing may
cause premature failure due to internal cabinet
pressure and vibration.
C6
10uF 50V electrolytic radial* BU120 and
S53AMI
Power output module. Use only factory
replacement
Faceplate
Faceplate. Use only factory replacement
Air leak cover Use only factory replacement
CMC1
Use only factory replacement
L1
Use only factory replacement
Fuse PCB
Use only factory replacement
Main PCB
Use only factory replacement
R29
470
Ω
.25W METAL OXIDE, non flammable
Leakage/Resistance Check
Before returning the unit to the customer, perform a leakage
or resistance test as follows:
Leakage Current. Note there is no power switch on this unit.
When the power plug is plugged in, the unit is live. Connect
the unit to its rated power source. Using an ammeter,
measure the current between the neutral side of the AC
supply and chassis ground of the unit under test. if leakage
current exceeds 0.5mA, the unit is defective. Reverse the
polarity of the AC supply and repeat.
Resistance. Measure the resistance from either side of the
line cord to chassis ground. If it is less than 500k ohms, the
unit is defective.
WARNING! DO NOT
return the unit to the customer if it fails
one of these tests until the problem is located and corrected.
2
Amplifier/Subwoofer
BU-80/HTS-10
*
See
Service Bulletin (INF2000-01)
page 15.
**
Rev A version
of the BU-80/HTS-10 subwoofer uses
the following SAFETY PARTS:
#80103 -
T1
Power Transformer #4300
#80104 -
F1
Line fuse 0.5A 250V T type slo-blo
Rev B version
of the BU-80/HTS-10 subwoofer uses the
following SAFETY PARTS:
#80127 -
T1
Power Transformer #4300F
#80111 -
F1
Line fuse 1.0A 250V T type slo-blo
Either
Rev A
or
Rev B
can be identified by:
The correct fuse rating will be printed on the amplifier
label;
BU-80: Rev A version
serial #AM0011-29474 and
below;
Rev B version
serial #AM0011-29475 and
above.
HTS-10: Rev A version
serial #AM0011-07400 and
below;
Rev B version
serial #AM0011-07401 and
above.
See
Service Bulletin (INF2000-02)
page 16.
HTS-20 rev. A,B only.
or CON101
HTS-10 subwoofer only
There is a third version, "C", with minor internal
differences.
Data for this version is included, and differences noted
in the following pages.
Units can be identified for service as follows:
Amplifier faceplate says "Made in Canada" on the
"B" version.
Amplifer faceplate says "Made in China" on the
"C" version.
