PART III ELECTRICAL SYSTEM OF THE UNIT
3-12
ENGLISH
3.7 SPEAKER
The speaker of the unit produces melody when you start unit, press the buttons or shut off the unit. The speaker is
composed of speak, speaker wire and connector. The speaker is located in the speaker holder and attaches to the unit
case by its magnetic. The speaker wire is connected to the main circuit board (Fig. 3.7-1). If the unit is no melody, you
should check if the speaker wire connection is connected loosened or replace the speaker. The speaker will be
interfered by any sparks from cell or power contact terminals.
Speaker
holder
Speaker
Melody chip (IC4)
Speaker wire
Speaker wire
connection
Speaker wire
connection
Speaker wire
connection
I
Melody chip (IC6)
Speaker wire
connection
Speaker wire
The speaker (6V, 0.5W, 8
ohm) is enlosed with a
electrical tape to prevent
interference from the unit
metal case.
Fig. 3.7-1 The speaker and main circuit board.
Main circuit board-A
Main circuit board-B
Содержание R200T
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