4. TROUBLE SHOOTING
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4.16 PTT Trouble
CIRCUIT DIAGRAM
Checking Flow
5
COM
GND
3
1
IN
NC
4
6
NO
2
VCC
U204
NLAST4599DFT2
2V8_VEXT
NA
R228
R226
0
C223
0.1u
RADIO_SPK_R
REC_P
SPK_RADIO_SEL
Resolder the Cable
Change the Receiver
START
SPKP_LDO_EN signal is
High?
Yes
No
No
Yes
Reconnect FPCB to CN601
Connection
between FPCB and
CN601 is OK?
PTT is Operated!!
Yes
AMP_SD signal
is Low?
Soldering between
cable and board is OK?
Cables of Receiver
are OK?
Only receiver is Operated
Yes
Yes
Yes
No
No
Yes
SPK_P_SM signal is
High?
AMP_SD signal
is High?
Содержание B2070
Страница 54: ... 53 4 TROUBLE SHOOTING 4 2 TX Trouble TEST POINT 13Mhz OSCILLATOR Mobile SW FEM TRANCEIVER LDO PAM ...
Страница 68: ... 67 4 TROUBLE SHOOTING TEST POINT 4 6 LCD Trouble ...
Страница 72: ... 71 4 TROUBLE SHOOTING TEST POINT 4 8 Speaker Trouble ...
Страница 79: ... 78 4 TROUBLE SHOOTING 4 11 KEY backlight Trouble TEST POINT ...
Страница 96: ...6 Press Start and Pover on the phone using JIG remote Power on Switch 1 5 DOWNLOAD AND CALIBRATION 95 ...
Страница 107: ... 106 8 PCB LAYOUT Figure 8 1 B2070 BOTTOM SIDE PCB LAYOUT ...
Страница 108: ... 107 8 PCB LAYOUT Figure 8 1 B2070 TOP SIDE PCB LAYOUT ...
Страница 109: ... 108 ...
Страница 117: ...10 STAND ALONE TEST 116 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 121: ... 120 ...
Страница 123: ... 122 ...