4. TROUBLE SHOOTING
- 72 -
No
Yes
Re_solder the
R218,R219
The Voltage
at JACK_DETECT point
is 0V?
Soldering
Of R218,R219 is OK?
No
Yes
No
Change the J200
Pin3 and Pin4 of J200
are open?
Yes
The ABB is out of order.
Change the board.
1. Earphone detection problem
2. Sending Path problem
No
Re_solder the
R209, R211
Yes
Yes
No
The
soldering of C219
is OK?
The ABB is out of order.
Change the board.
The voltage at L200
is 0.99V ~ 1.03V?
A few
tens or hundreds
of mV of signals at C219
are measured ?
No
The
soldering of J200
is OK?
Yes
No
Yes
The earphone is OK?
Yes
The ABB is out of order.
Change the board.
Set audio part of the test
equipment to the echo mode.
No
Z3X-BOX.COM
Summary of Contents for MG220
Page 1: ...Date May 2006 Issue 1 0 Service Manual MG220 Service Manual Model MG220 Z 3 X B O X C O M ...
Page 3: ... 2 Z 3 X B O X C O M ...
Page 5: ...Z 3 X B O X C O M ...
Page 32: ...3 H W Circuit Description 31 Figure 14 Power Supply Scheme Z 3 X B O X C O M ...
Page 46: ...4 TROUBLE SHOOTING 45 4 TROUBLE SHOOTING 4 1 Main Components Placement Z 3 X B O X C O M ...
Page 93: ...5 DOWNLOAD 92 5 2 3 Configuration Setting C GSMULTI Model MG220 dll Z 3 X B O X C O M ...
Page 94: ...5 DOWNLOAD 93 5 2 4 Press Start Button Z 3 X B O X C O M ...
Page 95: ...5 DOWNLOAD 94 5 2 5 After Start Button Which Stand by condition Z 3 X B O X C O M ...
Page 96: ...5 DOWNLOAD 95 5 2 6 SW downloading Condition MG220 Z 3 X B O X C O M ...
Page 97: ...5 DOWNLOAD 96 5 2 7 SW downloading END Condition Z 3 X B O X C O M ...
Page 99: ...6 SERVICE AND CALIBRATION 98 4 Click on CALIBRATION START button Z 3 X B O X C O M ...
Page 108: ... 107 8 pcb layout Z 3 X B O X C O M ...
Page 109: ... 108 8 pcb layout Z 3 X B O X C O M ...
Page 113: ... 112 Z 3 X B O X C O M ...
Page 129: ...Note Z 3 X B O X C O M ...
Page 130: ...Note Z 3 X B O X C O M ...