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4
1.2.
Before Repair and Adjustment
Caution : DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
• Current consumption at AC 230V, 50Hz in TUNER mode at volume (min) should be (~300 mA).
1.3.
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.
• 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:
"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.
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.
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.5.
Safety Part 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.
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.
Table 1
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
14
RKHN0005B-H
HANDLE
401
RD-DAPX001-V
TRAVERSE UNIT
A2
K2CQ2CA00007
AC CORD
A3
RQTX1034-D
O/I BOOK (Ge/It/Fr)
A3
RQTX1035-E
O/I BOOK (Du/Da/Sw)
A3
RQTX1041-Z
O/I BOOK (En/Sp/Po/Cz)
PCB3
REPNT0063G
POWER P.C.B.
(RTL)
L5901
ELF15N035AN
LINE FILTER
T5903
G4C5ACH00007
MAIN TRANSFORMER
T5904
G4C2AAH00002
SUB TRANSFORMER
Z5902
ERZVA5Z471
ZNR SURGE
F5901
K5D402BLA013
FUSE
F5902
K5D162BLA013
FUSE
RL5901
K6B1AEA00003
RELAY
FP4100
K5G502A00039
FUSE PROTECTOR
FP5903
K5G502A00039
FUSE PROTECTOR
JK5901
K2AA2B000014
AC INLET
ZA5901
K3GE1ZZ00001
FUSE HOLDER
ZA5902
K3GE1ZZ00001
FUSE HOLDER
ZA5903
K3GE1ZZ00001
FUSE HOLDER
ZA5904
K3GE1ZZ00001
FUSE HOLDER
R4149
D0AF1R5JA113
1.5 1/8W
R4153
D0AF1R5JA113
1.5 1/8W
R4154
D0AF1R5JA113
1.5 1/8W
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