SC-HC40EG, SC-HC40EP - Panasonic Audio Service Manual (repair manual). Page 4

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1.2.

Before Repair and Adjustment

Disconnect AC power, discharge unit AC Capacitors as such C5700, C5701, C5702, C5706, C5708 and C5709 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.

• Current consumption at AC 220V - 240V, at 50Hz in NO SIGNAL mode (at volume min in FM Tuner mode) should be ~200 mA.

1.3.

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 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.

Table 1

Safety

Ref. No.

Part No.

Part Name & Description

Remarks

55

RYKX1026A-K

REAR CABINET

20

RGNX1043A-K

NAME PLATE LABEL

EP-K

20

RGNX1043M-K

NAME PLATE LABEL

EG-K,EG-N

401

RAE0165T-V

TRAVERSE UNIT ASS'Y

A2

K2CQ2CA00007

AC CORD

A3

RQTX1076-R

O/I BOOK (En/Po/Cz/Ru/Ur)

EP-K

A3

RQTX1079-D

O/I BOOK (Ge/It/Fr/Sp/Du/Da/Sw)

EG-K,EG-N

T1000

G4D1A0000117

SWITCHING TRANSFORMER

T5701

ETS28BH186AC

TRANSFORMER

T5751

ETS19AB221AG

SUB TRANSFORMER

P5701

K2AA2B000011

AC INLET

C5700

F1BAF1020020

1000pF

C5701

ECQU2A334MLA

0.33uF

C5702

ECQU2A104MLC

0.1uF

C5706

F1BAF1020020

1000pF

C5708

F1BAF1020020

1000pF

C5709

F1BAF1020020

1000pF

L5701

G0B453G00003

LINE FILTER

F1

K5D162BK0005

FUSE

RY5701

K6B1AEA00003

RELAY

PC5720

B3PBA0000402

PHOTO COUPLER

DZ5701

ERZVA5Z471

ZNR

FP1000

K5H7512A0010

PROTECTOR

TH5701

D4CC11040013

THERMISTOR

TH5702

D4CAC8R00002

THERMISTOR

PCB14

REPX0820BA

SMPS P.C.B.

(RTL)