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902SH
8.2. Ring tones are heard from the speaker but voice is not.
Is signal sent to R1612?
NO
IC1200 is defective.
8.3. Voice is heard from the speaker but ring tones are not.
Is the volume set to zero?
NO
Is clock sent to R1673?
NO
IC1200 is defective.
9. The display does not appear on Main Display.
Is the flexible PWB of the display securely
locked to CN3000?
YES
Replace Main Display.
Does the display appear?
YES
Main Display unit is defective.
CONFIDENTIAL
IC1600 is defective.
YES
Is sound heard after turning up the volume?
YES
R1673 is defective.
YES
Or IC1600 is defective.
Unlock it, and then reinsert and lock it.
NO
Are the following display parts in good condi-
NO
tion?
C3050, C3053, C3055, C3056, C3057, C3058,
C3059, C3060, C3062, C3063, C3064, C3066,
C3067, C3068, C3069, C3070, D3000, D3003,
IC3006, R3019, R3021, R3062, R3063, R3018,
C3044
Is 2.9 ± 0.1 V applied to TP3026 and R3019?
Is 1.85 ± 0.1 V applied to TP3027 and R3063?
Is the waveform from R3018 a 6.5 MHz pulse
NO
wave?
Is the waveform from RA3010, RA3011,
RA3012, RA3013, R3017, and R3024 a pulse
wave?
CN3000 socket parts are defective, or the dis-
play PWB pattern is broken.
Is 3.2 V or more applied to TP3004?
Is the waveform of TP3002 a rectangular
wave?
IC3000 is defective.
2 – 30
YES
NO
NO
YES
NO
YES
YES
NO
YES
NO
YES
NO
YES
OK.
The display parts are
not mounted properly.
The battery is defec-
tive or not set; the
PWB is defective; the
battery needs to be
charged; the thin
coaxial cable socket is
mounted improperly or
broken; the main PWB
is defective; R3019
and R3063 are
mounted improperly;
or the display PWB is
defective.
RA3010, RA3011,
RA3012, RA3013,
R3017 and R3024 are
defective or mounted
improperly.
The thin coaxial cable
is broken, or the thin
coaxial cable socket is
in poor contact.
R3008A is mounted
improperly, or the dis-
play PWB and the
main PWB are defec-
tive.
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