Before Repair And Adjustment; Protection Circuitry; Safety Parts Information - Panasonic SA-AKX30PH Service Manual

1.4.

Before Repair and Adjustment

Disconnect AC power to discharge unit AC Capacitors as such (C5701, C5703, C5704, C5705, C5706, C5707, C5708) 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 120 V, 60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA. (PN)
Current consumption at AC 110~127 V / 220~240 V, 50/60 Hz in NO SIGNAL mode volume minimal should be ~ 500 mA. (PH)
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 REXX1030
7 REXX1031
13 RGRX1002C-A3
13 RGRX1002D-A2
37 RKMX1003-K
401 RAEX0190Z-V
A2 K2CB2CB00021
A2 K2CQ2CA00007
A3 K2DAYYY00002
A3 RQTX1090-M
A3 RQTX1091-M
A3 RQTX1100-M
PCB3 REPX0809A
PCB3 REPX0809C
PCB10 REPX0809C
DZ5701 ERZV10V511CS
S5701 K0ABCA000007
L5703 G0B612H00002
T5701 ETS39AG4M6AD
T5701 ETS39AG4NGAD
T5751 ETS19AB2E6AG
T6000 G4DYA0000214
PC5701 B3PBA0000402
PC5702 B3PBA0000402
PC5720 B3PBA0000402
PC5799 B3PBA0000402
F1 K5D632BK0007
F1 K5D802APA008
TH5702 D4CAA2R20001
TH5860 D4CC11040013
TH5900 D4CC11040013
P5701 K2AA2B000011
P5701 K2AB2B000007
C2253 F1H1H470A004
Part Name & Description
1P RED WIRE (VOLTAGE-SMPS)
1P BLACK WIRE (VOLTAGE-SMPS) PH
REAR PANEL
REAR PANEL
TOP CABINET
TRAVERSE UNIT
AC CORD
AC CORD
AC CORD
O/I BOOK (Sp)
O/I BOOK (Sp)
O/I BOOK (En)
SMPS P.C.B.
SMPS P.C.B.
VOLTAGE SELECTOR P.C.B.
ZNR
SW VOLTAGE SELECTOR
LINE FILTER
MAIN TRANSFORMER
MAIN TRANSFORMER
SUB TRANSFORMER
SWITCHING TRANS
PHOTO COUPLER
PHOTO COUPLER
PHOTO COUPLER
PHOTO COUPLER
FUSE
FUSE
THERMISTOR
THERMISTOR
THERMISTOR
AC INLET
AC INLET
47pF 50V
4
Remarks
PH
PN
PH
PN
PH
PH
PN
PH
PN
(RTL) PN
(RTL) PH
(RTL) PH
PH
PH
PN
PH
PN
PH
PN