Repair Manual of Lenovo P70-A Mobile Phone
2
Content
1.
Appearance
............................................................................................................................. 5
2.
Layout of main board
............................................................................................................. 6
3.
Baseband
................................................................................................................................. 7
4.
Main adverse analysis ............................................................................................................... 8
4.1
LCD
DISPLAY
........................................................................................................................... 8
4.1.1
No display on screen after power-on ................................................................................... 8
4.1.2
LCD backlight without lighting ........................................................................................... 9
4.2
C
AMERA DEFECTS
................................................................................................................... 10
4.2.1
Rear camera defects .......................................................................................................... 10
4.3
R
ING AND VIBRATION
.............................................................................................................. 11
4.3.1
No vibration ....................................................................................................................... 11
4.3.2
No ring ............................................................................................................................... 12
4.4
C
HARGING
.............................................................................................................................. 13
4.4.1
No charging display after plugging the charger in ............................................................ 13
4.4.2
Charging shown but not full charging ............................................................................... 14
4.5
K
EYBOARD AND KEYBOARD BACKLIGHT
................................................................................ 15
4.5.1
Abnormal operation of side keys ....................................................................................... 15
4.5.2
Abnormal operation of CTP keyboard ............................................................................... 16
4.6
C
ALLING
................................................................................................................................. 17
4.6.1
No voice heard from the other side during the call ............................................................ 17
4.6.2
No voice heard from your side during the call ................................................................... 18
4.7
P
OWER
-
ON FAILURE
................................................................................................................ 19
4.8
LCD
ON WHEN CLOSE TO THE EAR DURING THE CALL
;
LCD
OFF WHEN AWAY FROM THE EAR
. 20
4.9
R
ADIO FREQUENCY
(RF) ......................................................................................................... 21
4.10
S
OFTWARE
D
OWNLOAD
F
AILURE
............................................................................................ 21
4.11
P
RODUCTION CALIBRATION
.................................................................................................... 22
4.11.1
AFC calibration ............................................................................................................. 22
4.11.2
AGC ............................................................................................................................... 23
4.11.3
APC ............................................................................................................................... 24
4.12
F
AULT IN COMPLETE SET TEST
/
REWORK
................................................................................. 26
4.12.1
Switch spectrum & PVT template with excessive standard ........................................... 26
4.12.2
High Frequency Error ................................................................................................... 27
4.12.3
High Phase Error .......................................................................................................... 27
4.12.4
Power output problems .................................................................................................. 28
4.13
3G/4G
FORECAST
................................................................................................................... 29
4.13.1
RSSI _Cal ...................................................................................................................... 29
4.13.2
TPC _ Cal ...................................................................................................................... 29
4.14
3G/4G
COMPREHENSIVE TEST
................................................................................................. 31
4.14.1
ACLR or SEM ................................................................................................................ 31
4.14.2
ILPC comprehensive test abnormal ............................................................................... 31
Summary of Contents for P70-A
Page 1: ...Service Manual of Lenovo P70 A Mobile Phone Lenovo ...
Page 5: ...Version No Prepared by Modified by Prepared Modified on Reason for change Main changes ...
Page 6: ...1 Appearance ...
Page 8: ...Repair Manual of Lenovo P70 A Mobile Phone 7 3 Baseband Block diagram of hardware system ...
Page 37: ...Repair Manual of Lenovo P70 A Mobile Phone 36 Figure 9 ...
Page 40: ...Repair Manual of Lenovo P70 A Mobile Phone 39 Figure 14 ...
