4
1.3.1. Caution for fuse replacement
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
18 RGRX0071C-E REAR PANEL PH-K
18 RGRX0071C-F REAR PANEL PR-K
31 RKMX0141-1K3 TOP CABINET
50 REXX0728 BLACK WIRE (SMPS-AC)
51 REXX0730 RED WIRE (SMPS-AC)
55 REXX0643 BLUE WIRE (VOLT. SELECTOR-SMPS)
56 REXX0729 WHITE WIRE (VOLT. SELECTOR-SMPS)
301 RD-DDTX001-V TRAVERSE UNIT (RTL)
A2 K2CJ2DA00006 AC CORD PR-K
A2 K2CQ2CA00007 AC CORD PH-K
A3 RQTX0245-M O/I BOOK (Sp)
PCB7 REPX0729B SMPS P.C.B (RTL)
PCB8 REPX0729B AC INLET P.C.B (RTL)
PCB9 REPX0729B VOLTAGE SELECTOR P.C.B (RTL)
DZ5701 ERZV10V511CS ZNR
S5701 K0ABCA000007 SW AC VOLTAGE SELECTOR
L5702 ELF19H015A LINE FILTER
L5703 ELF19H015A LINE FILTER
T2900 G4D1A0000117 SWITCHING TRANSFORMER
T5701 ETS35BC2P6AC MAIN TRANSFORMER
T5751 ETS19AB2A6AG BACKUP TRANSFORMER
PC5702 B3PBA0000402 PHOTO COUPLER
PC5720 B3PBA0000402 PHOTO COUPLER
PC5799 B3PBA0000402 PHOTO COUPLER
RY5701 K6B1AEA00003 RELAY
F1 K5D402BK0007 FUSE
F2 K5G162B00016 FUSE
FP2901 K5H1022A0011 PROTECTOR
TH5702 D4CAA5R10001 THERMISTOR
P5701 K2AA2B000017 AC INLET
C5700 F1BAF1020020 1000pF
C5701 ECQU2A104MLC 0.1uF
C5702 ECQU2A104MLC 0.1uF
C5703 ECQU2A104MLC 0.1uF
C5706 F1BAF1020020 1000pF
C5707 F1BAF1020020 1000pF
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