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Repair Item 1: At power on, "00" is not displayed.
3.2 V
Power on
Figure 1
Repair Item 2: "-- --" is displayed instead of playing first song track.
Check how much times it takes until "-- --"
is displayed after PLAY button is pressed.
About
14 sec
A
1
Is +3.2 V lines normal ?
Yes
Is the waveform
at IC104 pin 28 like that
shown in fig. 1 ?
Yes
Does 5 MHz clock pulse
appear at IC104 pin 29 ?
Yes
IC104 is defective.
Check circuit around IC104 and
CN102 for loose soldering and heat
seal connecting.
2
RESUME switch (SW101) off position.
No
Q106, Q107 or Q108 is defective.
Check circuit around IC101 and IC104.
No
IC101 is defective.
Check circuit around IC101 and IC104.
Crystal (X102) is defective.
No
IC104 is defective.
Check circuit around IC104 and X102.
Over
14 sec
B
5
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