Protection Circuitry; Safety Parts Information - Panasonic SA-AK180PN Service Manual

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
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.
in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts
Safety Ref. No. Part No.
11 REXX0684-1
11 REZX0023-1
12 REXX0685-1
12 REZX0024-1
21 RGRX0070V-G
21 RGRX0070W-C
40 RKMX0144A-K
340 RAEX0190A-V
A2 K2CB2CB00021
A2 K2CQ2CA00007
A3 RQTX0305-M
A3 RQTX0306-M
A3 RQTX0307-M
PCB1 REPX0714A
PCB1 REPX0714C
PCB4 REPX0714A
PCB4 REPX0714C
PCB9 REPX0714C
DZ5701 ERZV10V511CS
S5701 K0ABCA000007
L5703 ELF21N024A
T2900 G4D1A0000117
T5701 ETS42BM18GAD
T5701 ETS42BN1A6AD
T5751 ETS19AB256AG
PC5701 B3PBA0000402
PC5702 B3PBA0000402
PC5720 B3PBA0000402
PC5799 B3PBA0000402
F1 K5D802APA008
F1 K5D802BNA005
FP2901 K5G4013A0001
TH5001 D4CC11040013
TH5701 D4CAA5R10001
TH5702 D4CAC8R00002
Part Name & Description
BLACK WIRE (AC INLET-SMPS)
BLACK WIRE (AC INLET-SMPS)
RED WIRE (AC INLET-SMPS)
RED WIRE (AC INLET-SMPS)
REAR PANEL
REAR PANEL
TOP CABINET
TRAVERSE ASS'Y (W/O CD SERVO) (RTL)
AC CORD
AC CORD
O/I BOOK (Sp)
O/I BOOK (En)
O/I BOOK (Sp)
SMPS P.C.B.
SMPS P.C.B.
AC INLET P.C.B.
AC INLET P.C.B.
VOLTAGE SELECTOR P.C.B.
ZNR
SW VOLTAGE SELECTOR
LINE FILTER
SWITCHING TRANSFORMER
MAIN TRANSFORMER
MAIN TRANSFORMER
SUB TRANSFORMER
PHOTO COUPLER
PHOTO COUPLER
PHOTO COUPLER
PHOTO COUPLER
FUSE
FUSE
FUSE PROTECTOR
THERMISTOR
THERMISTOR
THERMISTOR
4
Remarks
PN
PU
PN
PU
PN
PU
PN
PU
PN
PN
PU
(RTL) PN
(RTL) PU
(RTL) PN
(RTL) PU
(RTL) PU
PU
PN
PU
PN
PU
PN
PU