Safety Information - JBL PSW-D115 Service Manual

Amplifier/Subwoofer
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.
procedures are to be performed by qualified
personnel ONLY!
Caution
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.
Leakage/Resistance Check
Before returning the unit to the customer, perform a leakage
or resistance test as follows:
Leakage Current. 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.
Critical Components
All components identified with the IEC symbol
in the parts list and the schematic diagram
designate components in which safety can be
of special significance when replacing a
component identified with
replacement parts designated in the parts list or parts with
the same rating of resistance, wattage or voltage.

SAFETY INFORMATION

Therefore, any service
service
. Use only the
List of Safety Components Requiring
Exact Replacements
(
all parts POWER AMP PCB except TR2
F1 Fuse SLO BLO 3.0A 250V T type.
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.
TRX1 Transformer. Use only factory replacement.
C1, 2 2200uF, 100V 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.
C5 100nF 50 20 mono-ceramic axial
C6 4.7uf 100V 80/-20% Electrolytic radial NP
TR2 MPS A13 30V NPN(Darl)
DBR Bridge Rect 200V 4A
R1 10MW 0.25W 5% carbon film
R4a/b/c 0.1W 0.5W 5% metal film
R9 3.9kW 5W 5% ceramic wirewound
R15 100kW 0.5W 5% carbon film
R16, 17 2.4kW 5W 5% ceramic wirewound
R33, 50 332W 0.5W 5% carbon film
R52, 57 2.7kW 5W 5% ceramic wirewound
R61 5.1kW 2W 5% carbon film
S64AMI Power output module. Use only factory
replacement
Faceplate Faceplate. 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
PSW-D115
)
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