BenQ
Rev 1.0
Troubleshooting
Level 1 ~level 2 repair
Symptom
Probable Cause
Verification and Remedy
a).Battery either
discharged or
defective.
1. Measure battery voltage. If the battery
voltage is <3.2V, recharge the battery
using the appropriate battery charger.
2.If the battery can’t be recharge, replace
the battery.
1.Unit
doesn’t turn
on
b).Shield case short
with components
1.Visually inspect the RF/BB shielding
case. If they become deformed , replace
the shielding case
.
2.Keypad no
function.
Keypad bottom short 1.Disassembly to replace the keypad metal
dome.
3.Buzzer no
function
Components shift
1.Disassembly to visually inspect the U13.
If the spring of the U13 becomes
deformed, replace the U13.
4.Vibrator no
function
Components shift
1.Disassembly to visually inspect the M1. If
the spring of the M1 becomes deformed
and doesn’t contact well with PCB pads,
replace the M1.
5.Speaker
no function
Components shift
1.Disassembly to visually inspect the LS1.
If the spring of the M1 becomes
deformed and doesn’t contact well with
PCB pads, replace the LS1.
6.Micphone
no function
Components shift
1.Disassembly to visually inspect the X2. If
the cover of the X2 is not matched with
the micphone hole or micphone doesn’t
contact well with PCB pads, replace the
cover of the X2 or micphone.
7.Datacable
no function
Components are at
fault.
1.Measure voltage level if VR3 and
VR2B_SW voltage level are equal 2.9V.
8.Can’t
charge
Battery or charger is
at fault
1. Use the correct battery and charger to
check the charge function.
2.If charging function is ok, the battery or
charger is illegal.
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Страница 91: ...BenQ Rev 1 0 Radio Frequency function Descriptions Top Side 50 Bottom Side ...
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Страница 95: ...BenQ Rev 1 0 54 Apollo Block Diagram ...
Страница 96: ...BenQ Rev 1 0 Tx Block Diagram 55 ...
Страница 97: ...BenQ Rev 1 0 56 Rx Block Diagram ...
Страница 98: ...BenQ Rev 1 0 57 TX Front End EGSM DCS ...
Страница 99: ...BenQ Rev 1 0 58 Rx Front End EGSM DCS ...
Страница 100: ...BenQ Rev 1 0 59 RF power management ...
Страница 101: ...BenQ Rev 1 0 60 Tx Power ...
Страница 102: ...BenQ Rev 1 0 VCXO 61 ...
Страница 103: ...BenQ Rev 1 0 Base Band full schematic 62 ...
Страница 104: ...BenQ Rev 1 0 RF full schematic 63 ...
Страница 140: ...BenQ Rev 1 0 Replacement Parts Exploded View 99 Fig 1 Mechanical Exploded View I ...
Страница 141: ...BenQ Rev 1 0 Fig 2 Mechanical Exploded View II 100 ...
Страница 142: ...BenQ Rev 1 0 Fig 3 Mechanical Exploded View III 101 ...
