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4
1.2.1.
Caution for fuse replacement
1.3.
Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
• No sound is heard when the power is turned on.
• Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.4.
Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by
in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design
without permission of manufacturer.
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
23
RGRX0071D-D
REAR PANEL
37
RKMX0141-1K3
TOP CABINET
65
REXX0728
BLACK WIRE (SMPS-AC)
66
REXX0730
RED WIRE (SMPS-AC)
301
RD-DDTX001-V
TRAVERSE UNIT
(RTL)
A2
K2CB2CB00021
AC CORD
A3
RQTX0217-P
O/I BOOK (En)
PCB7
REPX0728N
SMPS P.C.B
(RTL)
PCB8
REPX0728N
AC INLET P.C.B
(RTL)
DZ5701
ERZV10V511CS
ZNR
L5701
ELF15N035AN
LINE FILTER
L5702
ELF22V035B
LINE FILTER
L5703
ELF22V035B
LINE FILTER
T2900
G4D1A0000117
SWITCHING TRANSFORMER
T5701
ETS42BM18GAD
MAIN TRANSFORMER
T5751
ETS19AB2A6AG
SUB TRANSFORMER
PC5702
B3PBA0000402
PHOTO COUPLER
PC5720
B3PBA0000402
PHOTO COUPLER
PC5799
B3PBA0000402
PHOTO COUPLER
RY5701
K6B1AEA00003
RELAY
F1
K5D802APA008
FUSE
F2
K5G162B00016
FUSE
FP2901
K5H1022A0011
FUSE PROTECTOR
TH5702
D4CAA2R20001
THERMISTOR
P5701
K2AB2B000011
AC INLET
C5700
F1BAF1020020
1000pF
Содержание SA-PT464P
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