Before Repair And Adjustment; Protection Circuitry; Safety Parts Information - Panasonic SA-AK580PH Service Manual

1.4.

Before Repair and Adjustment

Disconnect AC power to discharge unit AC Capacitors as such (C5700, C5701, C5703, C5704, C5705, C5706, C5707) through a
10 Ω, 10 W 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.
Current consumption at AC 110V~127V / 220V~240V, 50/60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA (For PH
only).
Current consumption at AC 120V, 60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA (For PN only).
1.5.

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.
1.6.

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.
Safety
in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts
Ref. No. Part No.
6 REXX0687-1
13 REZX0024-1
13 REXX0684-1
14 REXX0685-1
14 REZX0023-1
15 REXX0686-1
22 RGRX0070AAA2
22 RGRX0070Z-D1
41 RKMX0144A-K
340 RAEX0190A-V
A2 K2CB2CB00021
A2 K2CQ2CA00007
A3 RQTX0265-1M
A3 RQTX0266-1M
PCB1 REPX0714J
PCB1 REPX0714K
PCB4 REPX0714J
PCB4 REPX0714K
PCB9 REPX0714K
DZ5701 ERZV10V511CS
S5701 K0ABCA000007
L5702 ELF22V035B
T2900 G4D1A0000117
T5701 ETS48AB116AC
T5701 ETS48AB12GAC
T5751 ETS19AB256AG
PC5701 B3PBA0000402
PC5702 B3PBA0000402
PC5720 B3PBA0000402
PC5799 B3PBA0000402
F1 K5D802APA008
F1 K5D802BNA005
Table 1
Part Name & Description
BLUE WIRE (VOLT SELECTOR -SMPS)
BLACK WIRE (AC INLET-SMPS)
BLACK WIRE (AC INLET-SMPS)
RED WIRE (AC INLET-SMPS)
RED WIRE (AC INLET-SMPS)
WHITE WIRE (VOLT SELECTOR-SMPS)
REAR PANEL
REAR PANEL
TOP CABINET
TRAVERSE ASS'Y
AC CORD
AC CORD
O/I BOOK (En/Sp)
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
5
Remarks
PH
PH
PN
PN
PH
PH
PH
PN
(RTL)
PN
PH
PN
PH
(RTL) PN
(RTL) PH
(RTL) PN
(RTL) PH
(RTL) PH
PH
PH
PN
PN
PH