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Table of Contents
Related Manuals for Motorola C168
Summary of Contents for Motorola C168
- Page 1 C168 Level 3 Debug Guide 10/31/05 V1.0...
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Page 2: Table Of Contents
INDEX 1. Debug guide ..........................3 Baseband circuit Debug guide..................3 1.1.1 Phone is Dead ....................... 3 1.1.2 SIM Card Detection Error ..................4 1.1.3 Audio Fail ......................5 1.1.3.1 Headset Fail ..................... 5 1.1.3.2 Speaker Fail..................... 6 1.1.3.3 Handset Microphone Fail................7 1.1.3.4 Earphone Speaker Fail................... -
Page 3: Debug Guide
1. Debug guide 1.1 Baseband circuit Debug guide 1.1.1 Phone is Dead The phone is dead Voltage at C620 =3.6V Contact problem Voltage at C210=3.6V Defective IOTA (U202) or C215=1.5V(VRRTC) TP211=1.5V(RESPWON) Clock at TP210 Check R205 whether Defective Calypso (U201), =~ 32.768KHz 32768Hz is available X201 or PCB... -
Page 4: Sim Card Detection Error
1.1.2 SIM Card Detection Error SIM Card Detection Error Check if signal level at VRSIM=1.8 / 3.0V , SIMRST, Check SIM socket SIMCLK(=3.25MHz), SIMIO Soldering well Are correct Check SIM Card Defective IOTA Type or SIM Card U202 if well inserted Fault Finding Chart of “SIM Card Error”... -
Page 5: Audio Fail
1.1.3 Audio Fail 1.1.3.1 Headset Fail Earphone doesn't work Defective J102 Insert Earphone and Defective J102 or , R112 Check R112 if any level check if handset mode and R117,R118 are not change is detected well mounted Check U102_PIN6 if Defective CALYPSO Measure AC Signal of L101 ( R ) &... -
Page 6: Speaker Fail
1.1.3.2 Speaker Fail Speaker doesn't work Check if speaker is Defective Speaker well contacted Check CN401 Pin12, Defective CN401 B2B 14, 16 and 18 connector Measure speaker Defective U101, U201, signal on L31, C308, C309 Check mechanical fabrication Faulting Finding Chart of “Speaker fail”... -
Page 7: Handset Microphone Fail
1.1.3.3 Handset Microphone Fail Microphone doesn't work Measure L105, C111 and Defective U202 C112 any AC signal Check if CN401 contact well Defective CN401 Check if MIC FPC pad TP1, Check MIC FPC TP2 solder well Solder process Defective MIC Faulting Finding Chart of “Microphone fail”... -
Page 8: Earphone Speaker Fail
1.1.3.4 Earphone Speaker Fail Earphone doesn't work Check R315, R316 If Check R315, R316 any AC signal change solderring Check L32 If any AC signal Defective L32 change Check Earphone Impendence is Defective Earphone 32 Ohm Faulting Finding Chart of “Receiver fail” 1.1.4 LCM Fail LCD does not work Check if CN301 is well... -
Page 9: Charger Fail
1.1.5 Charger Fail Charger does not work Measure CON303 Pin 3 have voltage Defective CON303 > 4.0V ? Measure U304 Pin 1 & 3 Defective U304 is 0V ? Measure U308 Pin 7, 8 have Defective U308 voltage > 4.0V ? Measure U310 Pin 2 and Pin 3 >... -
Page 10: Vibrator Fail
1.1.6 Vibrator Fail Vibrator does not work Measure the signal of Vibrator_on at R406 Defective U202 > 2.8V Defective U41 Faulting Finding Chart of “Vibrator failed” 1.1.7 FM function Fail FM function Failed Check C703, C707, R708 Defective solder is well mounted C706, C707, R703 Check I2C Signal at Defective U201... -
Page 11: Radio Frequency Circuit Troubleshooting
1.2 Radio Frequency circuit troubleshooting 1.2.1 26MHz System clock fail No 26MHz clock Check if U601 Pin 1 Check Battery Cell is Check if U601 Pin 5 is > 3.2V empty ? 2.8V Check U606 Pin 1 Check if U601 Pin 3 or U606 Pin 3 If Defective U201 or Defective U606... -
Page 12: Rf Signal Diagram In Gsm900 Tx Mode
1.2.2 RF signal diagram in GSM900 Tx mode GSM900 Tx fail (BB lives) Check if Defective U201 Check if R603, C611 TP605~608 or U202 has modulaed RF signal have Sine wave Check if Check if C613 has TP614 has Defective U604 amplified RF signal ramp signal Defective... -
Page 13: Rf Signal Diagram In Dcs1800 Tx Mode
1.2.3 RF signal diagram in DCS1800 TX mode DCS1800 Tx fail (BB lives) Check if Check if R602, C612 TP605~608 Defective U201 has modulated RF have TxIQ sin or U202 signal wave Check if Check if C623 has TP614 has Defective U604 amplified RF signal ramp signal... -
Page 14: Rf Signal Diagram In Gsm900 Rx Mode
1.2.4 RF signal diagram in GSM900 Rx mode GSM900 Rx fail (BB Lives) Check if C617 Defective has input RF CON601 signal Check if Check if L606 Defective U608 U607 Pin 10 = 0V has input RF or U201 & U607 Pin 2 = 0V signal Check if C609, Defective... -
Page 15: Rf Signal Diagram In Dcs1800 Rx Mode
1.2.5 RF signal diagram in DCS1800 RX mode DCS1800 Rx fail (BB Lives) Check if C617 Defective has input RF CON601 signal Check if U607 Pin Check if L607 Defective U608 or 10 = 0V& U607 Pin has input RF U201 2 = 0V signal...