Ericsson R310s Troubleshooting Manual
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Ericsson R310s Troubleshooting Manual

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Trouble Shooting Guide, Standard
Applicable for R310s and R310sc
Contents
1
2
3
4
5
6
7
8
9
10
11
4/00021-2/FEA 209 544/31 B
Explanations ....................................................................................................................2
Network Problems...........................................................................................................4
On/Off Problems .............................................................................................................8
Audio Problems .............................................................................................................11
Display/Illumination Problems ....................................................................................14
Capacity/Charging Problems.......................................................................................17
SIM Problems................................................................................................................18
Key Problems.................................................................................................................19
Alert Problems...............................................................................................................20
Other Problems .............................................................................................................22
Revision History ............................................................................................................23
Trouble Shooting Guide, Standard
Approved according to 1776-2/FEA 209 544

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  • Page 1 Trouble Shooting Guide, Standard Trouble Shooting Guide, Standard Applicable for R310s and R310sc Contents Explanations ........................2 Network Problems......................4 On/Off Problems ......................8 Audio Problems ......................11 Display/Illumination Problems ..................14 Capacity/Charging Problems..................17 SIM Problems........................18 Key Problems.........................19 Alert Problems.......................20 Other Problems ......................22 Revision History ......................23...
  • Page 2 Trouble Shooting Guide, Standard 1 Explanations For component placing see doc.1078-2/FEA 209 544/31. Abbreviations Crystal. Capacitor. Digital circuit. Over voltage protection. Buzzer, LED, pads for display. Connector. Coil. Analogue circuit. Resistor. Keyboard pads. BALUN Component that converts a balanced signal to unbalanced or the other way around.
  • Page 3 Trouble Shooting Guide, Standard V380B: DC voltage for the radio part. VRTC: DC voltage for the Real Time Clock. VVCO: DC voltage for the synthesizer. I2C: Communications standard for two-way communication using only 2 wires, clock and data. 4/00021-2/FEA 209 544/31 B 3(23)
  • Page 4 Trouble Shooting Guide, Standard Pin Placing Double diode or single Single diode (PIN diode) Electrolytic capacitor transistor Five pin circuit (usually Six pin circuit Eight pin circuit voltage regulator) Ten pin circuit Crystal N200 N330 and N331 N551 J603 X100 2 Network Problems 4/00021-2/FEA 209 544/31 B 4(23)
  • Page 5 Trouble Shooting Guide, Standard Find out if the fault is RX- or TX-related Connect the phone to a GSM test instrument and try to get SERV at an input signal strength of -68.5dBm. If the phone does not get SERV at one or both bands, go to section 2.2. If the phone gets SERV, go to section 2.3.
  • Page 6 Trouble Shooting Guide, Standard Measure the voltage on pin 5 of N234 (3.8V). If the voltage is incorrect, measure the resistance of L211 (0 ohms). If the resistance is incorrect, replace L211. If the resistance of L211 is correct, measure the resistance from L211 to ground (>1 Mohms). If it is incorrect, replace C214, C211 and C212.
  • Page 7 Trouble Shooting Guide, Standard Read the RX-level while call is connected Make sure that the output power is 31-35 dBm for GSM power level 5 and that the RX-level value is 43±3 steps. Lower the input signal to –102dBm and make sure that the RX-level value is 6-12 steps and that the RX-quality value is 0-2 steps.
  • Page 8 Trouble Shooting Guide, Standard 3 On/Off Problems Type of fault Make an external visual check of the phone: Make sure that the battery connectors are intact, clean and fully functional. Make sure that there is no liquid damage on the system connector. Replace if needed. Insert a fully charged battery and press the On/Off key.
  • Page 9 Trouble Shooting Guide, Standard If the resistance over C615 is less, replace V607. If that does not help, replace C615. If the resistance over C615 is correct send the unit on according to the local company directives. Consumes less than 15 mA 3.5.1 Consumes no current Open the phone and check for liquid damage.
  • Page 10 Trouble Shooting Guide, Standard Turns off after a few seconds Open the phone and check for liquid damage. Power up the board and start it by pressing the On/Off key. Measure the VDIG voltage on C703, on the pin close to R706 (2.7 V) If the voltage is incorrect, measure that the resistance of C703 is more than 150 kohms.
  • Page 11 Trouble Shooting Guide, Standard 4 Audio Problems Type of fault Connect a call from the phone that is to be tested to a reference phone. Check the function of the microphone and the earphone. If the phone sounds strange (there is noise, distortion or the sound is “chopped”), send the unit on according to the local company directives.
  • Page 12 Trouble Shooting Guide, Standard If the fault remains, open the phone and measure the resistance of R862 (0 ohm), R861 (1.5 kohms), R863 (1 kohm) and R864 (22 kohms). Replace the corresponding component if it is incorrect. If all the resistances are correct, replace C863. If the fault remains, send the unit on according to the local company directives.
  • Page 13 Trouble Shooting Guide, Standard Fig. 4.2 Open the phone and check for liquid damage, especially around the system connector. Make sure that the system connector is not damaged. Measure the resistance of R804 (100 kohms), R640 (82 ohms) and C813 (>1 Mohm). Replace the corresponding component if it is incorrect.
  • Page 14 Trouble Shooting Guide, Standard 5 Display/Illumination Problems Type of fault Insert a fully charged battery into the phone and start it up by pressing the On/Off key. • If the phone does not start, go to chapter 3 (“On/Off problems”). •...
  • Page 15 Trouble Shooting Guide, Standard Measure the voltages on the display pads (H623, Fig. 5.1). If SDA or SCL voltage is missing, check the VDIG voltage (2.75V). If the VDIG voltage is correct, measure the resistance of R619 (6.8 kohms), R620 (6.8 kohms), R615 (0 ohm) and R614 (0 ohm).
  • Page 16 Trouble Shooting Guide, Standard Red or green top indicator does not work Open the phone and check for liquid damage. Make sure that the double LED (H650) is correctly soldered. If the soldering is correct, power up the board and start it by pressing the On/Off key. Measure the voltage on pin 1 of H650 (2.7 V).
  • Page 17 Trouble Shooting Guide, Standard 6 Capacity/Charging Problems Make a visual check of the battery connector and the system connector. Replace them if needed. Insert a fully charged battery into the phone and start it up by pressing the On/Off key. Turn the phone off and connect a charger to the system connector to make sure that a fault really exists.
  • Page 18 Trouble Shooting Guide, Standard 7 SIM Problems What is SIM-fault Insert a functional SIM-card and a charged battery into the phone. If “Wrong card” or “Insert correct card” is displayed on the display when starting the phone it means that the phone is SIM-locked. NOTE! If the phone shall be SIM-locked, make sure that a correct SIM-card is used.
  • Page 19 Trouble Shooting Guide, Standard 8 Key Problems Type of keyboard fault Insert a fully charged battery and a correctly working SIM-card into the phone. Start it up by pressing the On/Off key. • If the phone does not start at all, go to chapter 3 (“On/Off problems”). •...
  • Page 20 Trouble Shooting Guide, Standard 9 Alert Problems Type of fault Insert a dummy battery and a correctly working SIM-card into the phone and start it by pressing the On/Off key. Wait for the phone to get SERV (to the test instrument or on the net).
  • Page 21 Trouble Shooting Guide, Standard Measure the voltage on pin 2 of V621 (3.7V). If the voltage is incorrect the foil is damaged. Send the unit on according to the local company directives. Measure the voltage on pin 3 of V623 (3.7V). If the voltage is incorrect, measure the resistance of R683 (100 kohms).
  • Page 22 Trouble Shooting Guide, Standard 10 Other Problems 10.1 10.1.1 Type of fault Start the phone with a correctly working SIM-card and a fully charged battery. Set the correct time. Remove the battery and insert it after one minute. • If the phone clock is 00:00, go to section 10.1.2. Compare to the correct time.
  • Page 23 Trouble Shooting Guide, Standard 11 Revision History Rev. Date Changes / Comments 2000-05-12 2000-07-17 Changes in sections 6 and 7.2 Picture added to section 9.2 4/00021-2/FEA 209 544/31 B 23(23)
  • Page 24 Part List, Standard Part List, Standard Applicable for R310s and R310sc Contents Mounting Drawings ......................2 Component List .......................3 ROA 117 3982....................3 Revision History ......................13 131 22-2/FEA 209 544/31 A Approved according to 1776-2/FEA 209 544...

  • Page 25: Mounting Drawings

    Part List, Standard 1 Mounting Drawings The Mounting drawings show the components position on the printed board. The Mounting drawings can be found in document 1078-2/FEA 209 544/31. Board Number Mounting Drawing ROA 117 3982 R1E 1078-ROA 117 3982 Rev.D 131 22-2/FEA 209 544/31 A 2(13)

  • Page 26: Component List

    Part List, Standard 2 Component List • Pos.: The components position number on the board. • Description: Type of component mounted on the position. • Part Number: The components part number (or reference to Board Revision Changes) is specified for all components that can be replaced according to the Standard Repair Process.
  • Page 27 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments C302 Capacitor RJC 463 3023/1 C303 Capacitor RJC 516 4047/47 Network problems C304 Not mounted C311 Capacitor RJC 464 3024/12 C312 Capacitor RJA 532 4055/15 Network problems C313 Capacitor RJC 463 3023/1 C320...
  • Page 28 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments C443 Capacitor RJC 464 3025/1 C444 Capacitor RJC 464 3025/1 C445 Capacitor RJC 464 3025/1 C450 Capacitor RJC 463 3021/39 C451 Capacitor RJC 463 3021/22 C452 Capacitor RJC 463 3020/5 C453 Capacitor RJC 463 3022/1...
  • Page 29 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments C658 Capacitor RJC 463 3022/1 C659 Not mounted C660 Capacitor RJC 464 3036/1 C667 Capacitor RJC 464 3047/1 C668 Capacitor RJC 464 3024/1 C669 Not mounted C670 Capacitor RJC 463 3022/22 Display/Illumination Verify display function...
  • Page 30 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments C812 Capacitor RJC 516 3525/68 Audio problems Verify handsfree mic function C813 Capacitor RJC 516 3547/22 Audio problems Verify handsfree earphone function C817 Capacitor RJC 464 3024/1 Audio problems Verify handsfree mic function C818...
  • Page 31 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments F601 Varistor REY 203 08/1 Verify handsfree earphone function F603 Varistor REY 203 08/1 Verify handsfree mic function H600 Buzzer KLJ 107 17/01 Alert problems Verify buzzer function H650 Light emitting RKZ 433 666/1...
  • Page 32 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments N800 Prod. Adapt. Audio problems BGA Advanced Circuit R200 Resistor REP 622 453/27 R201 Resistor REP 622 455/1 R202 Resistor REP 622 654/47 R220 Resistor REP 622 654/27 Network problems R221 Resistor...
  • Page 33 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments R621 Resistor REP 622 453/22 Verify flash function R622 Resistor REP 622 453/47 Verify flash function R623 Resistor REP 622 453/47 Verify flash function R624 Resistor REP 622 455/39 Verify flash function R625 Resistor...
  • Page 34 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments R803 Resistor REP 622 454/1 Audio problems Verify handsfree mic function R804 Resistor REP 622 456/1 Audio problems Verify handsfree earphone function R805 Resistor REP 622 455/15 Audio problems Verify handsfree mic function R807...
  • Page 35 Part List, Standard ROA 117 3982 Pos. Description Part Number Ref. Comments V421 Transistor RYN 120 660/1 V500 Diode RKZ 123 654/1 Network problems, On/Off problems V502 Transistor RYN 121 6118/1 V503 Transistor RYN 121 6069/1 V504 Transistor RYN 120 664/1 V530 Transistor RYN 120 655/1...

  • Page 36: Revision History

    Part List, Standard 3 Revision History Rev. Date Changes / Comments 2000-05-05 131 22-2/FEA 209 544/31 A 13(13)
  • Page 37 Component Placing Component Placing Applicable for R310s and R310sc Contents Mounting Drawing Table....................2 1078-ROA 117 3982 Rev D..................... 3 Component Position Location Table for 1078-ROA 117 3982 Rev D .... 5 Revision History......................7 1078-2/FEA 209 544/31 A Approved according to 1776-2/FEA 209 544...

  • Page 38: Mounting Drawing Table

    Component Placing 1 Mounting Drawing Table Board Number Mounting Drawing ROA 117 3982 R1E 1078-ROA 117 3982 Rev D 1078-2/FEA 209 544/31 A 2(7)

  • Page 39: 1078-Roa 117 3982 Rev D

    Component Placing 2 1078-ROA 117 3982 Rev D 1078-ROA 117 3982 Rev D Primary side 1078-2/FEA 209 544/31 A 3(7)
  • Page 40 Component Placing 1078-ROA 117 3982 Rev D Secondary side 1078-2/FEA 209 544/31 A 4(7)

  • Page 41: Component Position Location Table For 1078-Roa 117 3982 Rev D

    Component Placing Component Position Location Table for 1078-ROA 117 3982 Rev D located on primary side located on secondary side Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. ANT1 1-B1 C312 1-B4 C363 1-A2 C452 1-B1 C613...
  • Page 42 Component Placing Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. Pos. Loc. C863 1-C4 L201 1-A2 N740 1-C4 R428 1-C2 R650 1-C5 R846 1-C4 V500 1-C1 C864 1-C4 L202 1-A1 N750 2-C3 R503 1-C1 R651 2-C6 R847 1-C4 V502...

  • Page 43: Revision History

    Component Placing 3 Revision History Rev. Date Changes / Comments 2000-05-05 1078-2/FEA 209 544/31 A 7(7)

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R310sc

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