Protection Circuitry; Safety Parts Information - Panasonic SA-PT750PC Service Manual

SA-PT750P / SA-PT750PC
1.2.1. Caution for fuse replacement
1.3.

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.
1.4.

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
Reference No.
PC5701 B3PBA0000402
PC5702 B3PBA0000402
PC5720 B3PBA0000402
PC5799 B3PBA0000402
D5701 B0FBAR000041
DZ5701 ERZV10V511CS
TH5701 D4CAA5R10001
TH5860 D4CC11040013
L2101 J0JBC0000015
L2201 J0JBC0000015
L2802 J0JBC0000015
L2803 J0JBC0000015
L2804 J0JBC0000015
L2805 J0JBC0000015
L5001 G0B9R5K00003
L5002 G0B9R5K00003
L5201 G0B9R5K00003
L5301 G0B9R5K00003
L5500 J0JKB0000020
L5501 J0JKB0000020
L5702
L5721 J0JKB0000020
T2900 G4D1A0000117
T5701 ETS42BM15GAD
T5751 ETS19AB236AG
F1 K5D802APA008
Table 1
Part No. Part Name & Description
PHOTO COUPLER
PHOTO COUPLER
PHOTO COUPLER
PHOTO COUPLER
THERMISTOR
THERMISTOR
CHIP INDUCTOR
CHIP INDUCTOR
CHIP INDUCTOR
CHIP INDUCTOR
CHIP INDUCTOR
CHIP INDUCTOR
CHOKE COIL
CHOKE COIL
CHOKE COIL
CHOKE COIL
EMI BEAD CORE
EMI BEAD CORE
ELF22V035B
EMI BEAD CORE
TRANSFORMER
TRANSFORMER
TRANSFORMER
6
Remarks
[M]
[M]
[M]
[M]
DIODE [M]
ZENER [M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
[M]
COIL [M]
[M]
[M]
[M]
[M]
FUSE [M]