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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 & 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
11
REXX0684-1
BLACK WIRE (AC INLET-SMPS)
PN
11
REZX0023-1
BLACK WIRE (AC INLET-SMPS)
PU
12
REXX0685-1
RED WIRE (AC INLET-SMPS)
PN
12
REZX0024-1
RED WIRE (AC INLET-SMPS)
PU
21
RGRX0070V-G
REAR PANEL
PN
21
RGRX0070W-C
REAR PANEL
PU
40
RKMX0144A-K
TOP CABINET
340
RAEX0190A-V
TRAVERSE ASS'Y (W/O CD SERVO) (RTL)
A2
K2CB2CB00021
AC CORD
PN
A2
K2CQ2CA00007
AC CORD
PU
A3
RQTX0305-M
O/I BOOK (Sp)
PN
A3
RQTX0306-M
O/I BOOK (En)
PN
A3
RQTX0307-M
O/I BOOK (Sp)
PU
PCB1
REPX0714A
SMPS P.C.B.
(RTL) PN
PCB1
REPX0714C
SMPS P.C.B.
(RTL) PU
PCB4
REPX0714A
AC INLET P.C.B.
(RTL) PN
PCB4
REPX0714C
AC INLET P.C.B.
(RTL) PU
PCB9
REPX0714C
VOLTAGE SELECTOR P.C.B.
(RTL) PU
DZ5701
ERZV10V511CS
ZNR
S5701
K0ABCA000007
SW VOLTAGE SELECTOR
PU
L5703
ELF21N024A
LINE FILTER
T2900
G4D1A0000117
SWITCHING TRANSFORMER
T5701
ETS42BM18GAD
MAIN TRANSFORMER
PN
T5701
ETS42BN1A6AD
MAIN TRANSFORMER
PU
T5751
ETS19AB256AG
SUB TRANSFORMER
PC5701
B3PBA0000402
PHOTO COUPLER
PC5702
B3PBA0000402
PHOTO COUPLER
PC5720
B3PBA0000402
PHOTO COUPLER
PC5799
B3PBA0000402
PHOTO COUPLER
F1
K5D802APA008
FUSE
PN
F1
K5D802BNA005
FUSE
PU
FP2901
K5G4013A0001
FUSE PROTECTOR
TH5001
D4CC11040013
THERMISTOR
TH5701
D4CAA5R10001
THERMISTOR
PN
TH5702
D4CAC8R00002
THERMISTOR
PU
Summary of Contents for SA-AK180PN
Page 21: ...21 Fig 3 Fig 4 ...
Page 22: ...22 Fig 5 ...
Page 33: ...33 9 2 Main Components and P C B Locations ...
Page 72: ...72 ...
Page 96: ...96 ...