5
1.4. 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.
1.5. 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, Exploded View & 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
7 REXX1122 1P BLACK WIRE (AC-SMPS)
8 REXX1123 1P RED WIRE (AC-SMPS)
20 RGRX1001C-C REAR PANEL
29 RKMX1002-K2 TOP CABINET
60 REXX1120 1P WHITE WIRE (SMPS-VOLTAGE SELECTOR)
61 REXX1121 1P BLUE WIRE (SMPS-VOLTAGE SELECTOR)
401 RAEX1022Z-V TRAVERSE UNIT
A2 K2CQ2CA00007 AC CORD
A3 RQTX1129-M O/I BOOK (Sp)
PCB8 REPX0803B AC INLET P.C.B. (RTL)
PCB9 REPX0803B SMPS P.C.B. (RTL)
PCB10 REPX0803B VOLTAGE SELECTOR P.C.B. (RTL)
DZ5701 ERZV10V511CS ZNR
S5701 K0ABCA000007 SW VOLT ADJ
L5702 ELF22V025A LINE FILTER
L5703 ELF22V025A LINE FILTER
T5701 ETS42BM1H6AC TRANSFORMER
T5751 ETS19AB2A6AG SUB TRANSFORMER
T6100 G4D1A0000142 SWITCHING TRANSFORMER
PC5702 B3PBA0000402 PHOTO COUPLER
PC5720 B3PBA0000402 PHOTO COUPLER
PC5799 B3PBA0000402 PHOTO COUPLER
RY701 K6B1AEA00003 RELAY
F1 K5D802BNA005 FUSE
TH5702 D4CAA5R10001 THERMISTOR
P5701 K2AA2B000011 AC INLET
C5700 F1BAF471A013 470pF
C5701 F0CAF104A105 0.1uF
C5702 F0CAF104A105 0.1uF
C5703 F0CAF104A105 0.1uF
C5705 F1BAF471A013 470pF
C5706 F1BAF471A013 470pF
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