DCT-3 Common Problems

[hangout2511]

DCT-3 Common Problems and Parts


Part
-Common Problems


Flash ic
-auto reset (test w/ sim and without sim)
- unknown flash
- unable to write
-writable but unable to power on
- cant write imei (for internal eeprom only, if external then its eeprom chip)
-with power but can't read by mbus/flasher device
- read flash at first byte(address at 0x20001 then stop
- when writing always display "battery voltage is too low.

SRAM-No Power - Ram is Bad (Test with Banana Flasher)
- Read and Write Flash but unable to power on
- Auto off, when trying to power on again, unit can't power on.waiting for a few minutes to power it on.
- writng flash,but cant detect by flasher device,empty.
- in 3210 reading/writing stop.

Cobba
-no power if shorted (test it by hang method)
-contact service (serial/parallel)
-no signal
a.no rx (receive)
b.no tx (transmit)
c.intermittent signal
d.fluctuating signal
-signal stable but cant reach when trying to call, cant send sms, cant make a call
-no audio (earpiece/*****piece)
-garbled audio
-cant unlock (openline)
-sim card not accepted always appear
-auto reset (test with simcard only)


CCONT-No power
- No Signal
a.no rx
b.no tx
c.fluctuating
-insert sim card
-writing flashing error
-always hang (jammed)
- auto off (with sim and without sim)
-no display
-contact service
-no ui interface (blight,buzzer, vibra)
-with power but cant read by mbus flasher device

HAGAR
-No Power
-No Signal
a.No rx
b. no Tx
c.Fluctuating
d.Intermittent
-Auto off when receiving signal or after receiving signal
-Hang then off.

PA-No transmit-No Rx if overcurrent
-Auto off when making a call, or before entering menu
-no Power if shorted
-Short battery standby time (fast drain)
-Weak Transmit

Crystal osci (13/26 Mhz)
-No Power
-No signal
-Auto off
-Hang

Clock Crystal-slow/too fast ringing tone-slow/too fast clock timing
-intermittent signal
-no power if shorted

Antenna Switch-No RX
-No TX
-Fluctuating Signal
-Intermittent Signal

This is not a complete solution.its just additional info, or maybe some reviews for our expert one, if you find some errors, just correct it.ill be glad to learn a new one.

if u hav additional info, just add. Thanks
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( Thanks to "YETYET")