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
in the Schematic Diagrams & 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
Reference No. Part No. Part Name & Description Remarks
340 RAE2025Z-S TRAVERSE UNIT [M]
PC701 B3PBA0000402 PHOTO COUPLER [M]
PC721 B3PBA0000402 PHOTO COUPLER [M]
TH701 D4CAA5R10001 THERMISTOR [M]
TH721 D4CAA5R10001 THERMISTOR [M]
L701 ELF15N035AN LINE FILTER [M]
L702 ELF19H015A CHOKE COIL [M]
LB102 J0JKB0000020 EMI BEAD CORE [M]
LB103 J0JKB0000020 EMI BEAD CORE [M]
LB507 J0JBC0000015 CHIP INDUCTOR [M]
LB509 J0JBC0000015 CHIP INDUCTOR [M]
LB510 J0JBC0000015 CHIP INDUCTOR [M]
LB8701 J0JBC0000015 CHIP INDUCTOR [M]
T701 ETS19AB221AG TRANSFORMER [M]
T721 ETS35BC2HGAD TRANSFORMER [M]
T722 G4D1A0000117 SWITCHING TRANSFORMER [M]
Z701 ERZV10D471CS ZENER [M]
RY701 K6B1AEA00015 POWER RELAY [M]
F701 K5D402AQ0002 FUSE 4A [M]
IP701 K5H302100004 FUSE PROTECTOR [M]
IP702 K5H2022A0011 FUSE PROTECTOR [M]
IP703 K5H302100004 FUSE PROTECTOR [M]
IP722 K5H7512A0010 FUSE PROTECTOR [M]
P701 K2AB2B000007 JACK AC INLET [M]
A2 K2CB2CB00018 AC CORD [M]
C701 F1BAF471A013 470P [M]
6
SA-PTX7P
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