Troubleshooting - Sharp TM200 Service Manual

[3] TROUBLESHOOTING

1. Power is not turned on.
2. Voice transmission/recording is impossible.
3. No voice is heard from the earpiece.
4. Battery does not charge.
5. Vibrator does not work.
6. Clock Settings are reset.
7. Speaker does not work.
8. MP3 cannot be played.
9. Video/Voice Recorder playback is impossible.
10. Back Light does not turn on.
1. POWER IS NOT TURNED ON.
Connect a battery of 4.0 V or more.
Execute File System Initialization of Downloader in SPST
without loading a file.
Does File System Initialize start properly
Is 3.6 V or more applied to BATT terminal (TP520)?
Is the voltage 1.2 V or lower on SENSE terminal (TP506)?
Is there conduction through fuse (FS501)?
Is 5-level stack memory (IC101) installed properly
Is 2.8 V and 1.8 V applied to VMEM (TP170) and VCORE
(TP171) respectively?
Is 3.0 V applied to VINT (TP173)?
Is the waveform of signals from R169 connected to X101 (32
kHz) correct? Are R167, R169, C174, C176, X101, and
IC106 good in appearance and mounted properly?
Is the rectangular wave of 13 MHz properly sent to TP713?
Is the triangular wave of 13 MHz sent from C833?
Is 2.9 V supplied from VTCXO (TP801)?
IC801 and peripheral circuits are defective.
CONFIDENTIAL
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
YES
TM200 1ADJUSTMENTS, PERFORMANCE CHECK, AND FIRMWARE UPGRADE
11. Out of range and incoming/outgoing calls are impossible.
12. The display does not appear on Main Display.
13. The display does not appear on External Display (in 65K
color mode).
14. Pictures cannot be taken.
15. AF does not move.
16. SIM card is not recognized.
17. SD (Memory) card is not recognized.
18. USB connection is impossible.
19. Bluetooth communication is impossible.
YES
Is the user area (file system) initialized by Flash Loader?
YES
Does normal mode start?
NO
Is it possible to rewrite the firmware?
YES
Does normal mode start after restart?
NO
5-level stack memory (IC101)
and IC106 are defective.
Battery terminals are defective, connector terminal is dirty, or
NO
soldering is improper.
NO
The battery is defective or set improperly.
NO
Fuse (FS501) is blown.
NO
5-level stack memory (IC106) is installed improperly.
NO IC103 is defective.
NO
IC111 is defective.
X101 (32 kHz oscillator), R167, R169, C174, and C176 are
NO
defective or mounted improperly.
Or oscillating circuit of IC106 is defective.
IC106, R179, and L110 are defective or mounted improperly.
YES
CN701 and CN102 are connected improperly.
YES
C801 is defective.
NO
Power Supply (IC804) is defective.
2 – 29
NO
5-level stack memory (IC101)
and IC106 are defective.
YES
5-level stack memory (IC101)
data is corrupted.
NO
5-level stack memory (IC101)
and IC106 are defective.
YES
Program code of 5-level stack
memory (IC101) is garbled.