CROSS V10 KEYPAD WAYS

ASALAMUALAIKUM WR WB

Troubleshoot to CROSS V10 Keypad line for making jumper

Connection to the components

Each color will jump to the same color from keypad to the component

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wasalamualaikum wr wb

Arek NGAJUM IsoIso Ae [ The Fully Fuckin' Headache Lion ]

CROSS V 5 Keyboard ways

ASALAMUALAIKUM WR WB

 

Today i got trouble on china brand CROSS V5, it uses pcb part number  C729_V1.01_PCB (110809). I think in the same case to the pcb serial as same as i handled will be same solution for keyboard trouble. Due to unworking MENU button and so button for key number 2 i've found these keyboard lines to make a jumper as shown in my pictures below.

For some models to indonesian market the pads i've labled A,B,C,D,E, and F are unused, they may use for music phone models only. 

The colored bricks will joint to the same colors i show as colored points as pictures below to make a jumper way for resoving the broken lines to SPREADTRUM cpu so you don't need to remove SPREADTRUM first before you make a jumper line. Exception for inner pads for keys 0 and #, you need to remove SPREADTRUM first to make a jumper way. Because they are straightly connect to SPREADTRUM pin N number 13.

Those all you need to repair the keyboard trouble to the same PCB serial on every china phones. Thank you for joining to haribagibagi.blogspot.com

wasalamualaikum wr wb

Arek NGAJUM IsoIso Ae [ The Fully Fuckin' Headache Lion ]

NEXIAN G868 Dead Phone Shorted

ASALAMUALAIKUM WR WB

In some case of dead phone caused by shorted circuit and components became a truly kill a lot of times. There will be too many areas will test for short component exist. The short will find when  you try to check out a dead phone using a multitester [ i prefer to analog multitester ]. It is easy to do, normally when the phone in a normal condition, it will show you the measurement on the multitester for about 5 ohm resistant when you put the RED to the PLUS battery connector and the BLACK to the GROUND of battery connector on the phone. And it will little goes up then drop back to 0 [ zero ] when you put the RED to the ground of battery connector and the BLACK to plus [ VBAT ].

If the phone completely short by current or charger, the multitester measurement will have same resistant. On the test will show you measurement to 0 [ zero ] ohm.

The areas need to checking for short are describe on the pictures below.

1. On the Charging area see picture below

2. See below for Power Amp area

3. On the LED Drive

 

4. On RF area

5. On the USB area

6. On Loudspeaker Drive area

7. On the Vibrator

8. To the connection lines of VBAT i've found my own trouble to this area of Power Management

9. If you have the same as me know you can remove D201 and replace it [ i found the same diode on old NOKIA 5110 ]

Then you can try your job to the phone by turn it on using battery [ do not using DC PS, because it will give you more trouble if there is still have short on the phone ]. When the trouble really cleared you'll find this picture below to your phone.

ALL DONE

Have a good day and a lot of THANKS to you

wasalamualaikum wr wb

Arek NGAJUM IsoIso Ae [ The Fully Fuckin' Headache Lion ]