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4
1.2.
Before Repair and Adjustment
Disconnect AC power, discharge unit AC Capacitors as such C702, C710, C725, C727, C728 and C730 through a 10W, 1W resistor
to ground.
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.
to ground.
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.
• Current consumption at AC 220-240V, at 50Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~250 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.
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.
Table 1
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
6
REXX0746-1
RED WIRE (AC INLET-SMPS)
7
REXX0747-1
BLACK WIRE (AC INLET-SMPS)
9
REXX0752-1
BLUE WIRE (AC INLET-SMPS)
30
RGNX0850A
NAME PLATE LABEL
101
REXX0771
WHITE WIRE (JW708)
102
REXX0772
BROWN WIRE (JW707)
300
RAE0165T-V
TRAVERSE ASS’Y
(RTL)
A2
K2CQ2CA00007
AC CORD
A3
RQTX0257-1B
O/I BOOK (En)
A3
RQTX0259-1R
O/I BOOK (Ru/Ur)
L702
G0B333E00002
LINE FILTER
L751
ELF15N035AN
LINE FILTER
T581
G4D1A0000117
SWITCHING TRANSFORMER
T701
G4DYA0000155
MAIN TRANSFORMER
T751
ETS19AB221AG
BACKUP TRANSFORMER
Z752
ERZV10V511CS
ZNR
PC701
B3PBA0000454
PHOTO COUPLER
PC751
B3PBA0000454
PHOTO COUPLER
RY701
K6B1AEA00017
RELAY
F751
K5D162BK0005
FUSE
FP581
K5H7512A0010
PROTECTOR
TH701
D4CAC8R00002
THERMISTOR
P751
K2AA2B000017
AC INLET
C702
ECQU2A104MLC
0.1uF
C710
F1BAF471A013
470pF
C725
ECQU2A104MLC
0.1uF
C727
F1BAF471A013
470pF
C728
F1BAF471A013
470pF
C730
F1BAF1020020
1000pF
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