Clock Settings Are Reset; Speaker Does Not Work - Sharp TQ-GX30E Service Manual

6. Clock Settings are reset.

Is 2.5 V or more applied to TP168 with a battery in the hand-
set?
Is 1.5 V or more applied to TP167 without a battery in the
handset?
X101, R169, R174A, and C176 are defective.

7. Speaker does not work.

* When ring tones sound, but keypad tones do not, "Keypad Tones" is set to Off.
* When Ringer Volume is set to "Silent":
· Voice Recorder playback sound is not produced.
· Playback sound of Video and MP3 can be heard by increasing the volume during playback.
Are speaker terminals in contact with the land?
Is the impedance between speaker terminals approx. 8 ohms?
Is the signal sent to TP701, TP702, or speaker contact pad?
Is the signal sent to CN103 pins 3 and 4?
Is VBAT voltage applied to IC105 pin 15?
Is approx. 3 V applied to IC105 pins 7 and 32?
Is the signal sent to IC105 pin 12?
IC105 or the control line to IC106 is defective.
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YES
YES
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YES
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YES
NO
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The holder is installed improperly.
Is back-up battery holder properly installed to SD/SIM FPC?
NO
• The remaining power of back-up battery is insufficient.
• Back-up battery is defective.
• Back-up battery holder is defective.
• SD/SIM FPC is broken, or CN104 is defective.
• R254 is defective.
IC103 is defective.
NO
NO
Speaker is defective.
NO
Speaker is defective.
YES
Speaker is defective.
The camera relay FPC, CN103, or CN701 is defective. Or the
YES
camera is in a poor contact with CN103 and CN701.
NO
R139 is defective.
NO
R158 is defective.
YES
R145 and R146 are defective, or IC105 is defective.
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GX30
NO
YES