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1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of this model.
1.2 Regulatory Information
A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example,
persons other than your company’s employees, agents, subcontractors, or person working on your
company’s behalf) can result in substantial additional charges for your telecommunications services.
System users are responsible for the security of own system. There are may be risks of toll fraud
associated with your telecommunications system. System users are responsible for programming and
configuring the equipment to prevent unauthorized use. The manufacturer does not warrant that this
product is immune from the above case but will prevent unauthorized use of common-carrier
telecommunication service of facilities accessed through or connected to it. The manufacturer will not
be responsible for any charges that result from such unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long as
repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If these
changes could reasonably be expected to affect the use of the phones or compatibility with the
network, the telephone company is required to give advanced written notice to the user, allowing the
user to take appropriate steps to maintain telephone service.
D. Maintenance Limitations
Maintenance limitations on the phones must be performed only by the manufacturer or its authorized
agent. The user may not make any changes and/or repairs expect as specifically noted in this manual.
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.
1. INTRODUCTION
Z3X-BOX.COM
Summary of Contents for U300
Page 3: ... 4 Z 3 X B O X C O M ...
Page 24: ...3 TECHNICAL BRIEF 25 Figure 3 3 1 1 RFR6250 IC functional block diagram Z 3 X B O X C O M ...
Page 46: ...3 TECHNICAL BRIEF 47 Figure PM6650 2 Functional Block Diagram Z 3 X B O X C O M ...
Page 76: ...4 TROUBLE SHOOTING 77 4 5 Checking WCDMA Block Z 3 X B O X C O M ...
Page 77: ...4 TROUBLE SHOOTING 78 4 3 5 1 2 Z 3 X B O X C O M ...
Page 82: ...4 TROUBLE SHOOTING 83 4 5 5 Check RF Rx Level Test Point RF Rx Level Z 3 X B O X C O M ...
Page 85: ...4 6 Checking GSM Block 4 TROUBLE SHOOTING 86 Z 3 X B O X C O M ...
Page 87: ...4 TROUBLE SHOOTING 88 Z 3 X B O X C O M ...
Page 89: ...4 TROUBLE SHOOTING 90 Z 3 X B O X C O M ...
Page 92: ...4 TROUBLE SHOOTING 93 Z 3 X B O X C O M ...
Page 95: ...4 TROUBLE SHOOTING 96 Z 3 X B O X C O M ...
Page 110: ...4 TROUBLE SHOOTING 111 C515 C516 CN501 Z 3 X B O X C O M ...
Page 116: ...4 TROUBLE SHOOTING 117 C201 C202 for MIC capacitor Z 3 X B O X C O M ...
Page 119: ...4 TROUBLE SHOOTING 120 Q400 Q401 Q402 VBATT GND Z 3 X B O X C O M ...
Page 140: ...6 BLOCK DIAGRAM 141 Z 3 X B O X C O M ...
Page 141: ...6 2 Interface Diagram U300 Interface Diagram 6 BLOCK DIAGRAM 142 Z 3 X B O X C O M ...
Page 149: ... 150 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 150: ... 151 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 151: ... 152 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 152: ... 153 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 153: ... 154 Z 3 X B O X C O M ...
Page 156: ...9 Calibration 157 Check testing object Click Start for Calibration Z 3 X B O X C O M ...
Page 157: ...9 Calibration 158 Show result of calibration Show result Z 3 X B O X C O M ...
Page 159: ... 160 Z 3 X B O X C O M ...
Page 183: ...Note Z 3 X B O X C O M ...
Page 184: ...Note Z 3 X B O X C O M ...