Read Panasonic SC-HC15EB / SC-HC15EG / SC-HC15EP Service Manual online
5
1.3.
Before Repair and Adjustment
Disconnect AC power, discharge unit AC Capacitors as such C702, C710, C725, C727 and C728 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.
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 ~200 mA.
1.4.
Caution For Fuse Replacement
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.
• 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.
1.6.
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.
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
26
RGNX1225J-K
NAME PLATE
EB,EG
26
RGNX1225K-K
NAME PLATE
EP
30
RGPX1060E-K
REAR CABINET
300
RAEX1034Z-V
TRAVERSE ASS’Y
A2
K2CQ2CA00007
AC CORD
EG/EP
A2
K2CZ3YY00005
AC CORD
EB
A3
RQTX1245-D
O/I BOOK (Ge/It/Fr/Sp/Du/Da/Sw)
EG
A3
RQTX1246-E
O/I BOOK (En/Po/Cz/Ru/Ur)
EP
A3
RQTX1247-B
O/I BOOK (En)
EB
C702
F0CAF104A105
0.1uF
C710
F1BAF2220023
2200pF
C725
F0CAF104A105
0.1uF
C727
F1BAF1020020
1000pF
C728
F1BAF1020020
1000pF
F751
K5G312Y00007
FUSE PROTECTOR
L702
G0B183E00002
LINE FILTER
L703
G0B111H00003
LINE FILTER
P751
K2AA2B000011
AC INLET
PC701
B3PBA0000503
PHOTO COUPLER
PC702
B3PBA0000503
PHOTO COUPLER
PCB10
REPX0917A
SMPS P.C.B.
(RTL)
SW7900
D4FBR5000009
RESETTABLE FUSE
T701
ETS28BT11GAC
MAIN TRANSFORMER
TH701
D4CAA5R10001
THERMISTOR
TH702
D4CC11040013
THERMISTOR
Z752
ERZVA5Z471
ZNR
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