Ericsson GH 688 Trouble-Shooting Instruction
  1. Manuals
  2. Brands
  3. Ericsson Manuals
  4. Telephone
  5. GH 688
  6. Trouble-shooting instruction

Ericsson GH 688 Trouble-Shooting Instruction

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
GH688,GA628, Standard Electrical Repairs
Approved according to 1776-2/FEA 209 544
Trouble-shooting
instruction
GH 688/GA 628
Standard electrical repairs
4/00021-2/FEA 209 544/1.G

Advertisement

Table of Contents
loading

Related Manuals for Ericsson GH 688

Summary of Contents for Ericsson GH 688

  • Page 1 GH688,GA628, Standard Electrical Repairs Approved according to 1776-2/FEA 209 544 Trouble-shooting instruction GH 688/GA 628 Standard electrical repairs 4/00021-2/FEA 209 544/1.G...

  • Page 2: Table Of Contents

    GH688,GA628, Standard Electrical Repairs Table of contents Conditions ..................3 Component classes................3 Abbreviations.................. 4 Pin placements ................6 No serv or can´t place a call............. 8 Doesn’t start..................13 Audio....................22 Display..................... 30 Charging.

  • Page 3: Conditions

    GH688,GA628, Standard Electrical Repairs 1 Conditions 1.1 Component classes. All the components in the phone are divided into classes and after every component in the troubleshooting guide you have a class written. The components are divided into four classes: A, B, C and D.The class of the component depends on how much of the phone’s performance is affected when replacing it.

  • Page 4: Abbreviations

    GH688,GA628, Standard Electrical Repairs 1.2 Abbreviations. The power module at some phones. Crystal. Capacitor. Digital circuit. Over voltage protection. VCO. Buzzer, LED, pads for display. Connector. Coil. Analogue circuit. Resistor. Keyboard pads. BALUN. A circuit that converts a signal from balanced to unbalanced or the opposite.
  • Page 5 GH688,GA628, Standard Electrical Repairs SIMCLK: Clock signal from the processor used for communications with the SIM. SIMDAT: Data signal from the processor used for communications with the SIM. SIMRST: Reset signal from the processor used for communications with the SIM. SIMVCC: Feed voltage for the SIM.

  • Page 6: Pin Placements

    GH688,GA628, Standard Electrical Repairs 1.3 Pin placements Single diode (PIN diode). Electrolytic capacitor. Double diode or single trans- Five pin circuit (usually volt- Double transistor. stor. age regulator). Eight pin circuit. VCO circuit Crystal Sixteen pin circuit Twenty pin circuit (112) 4/00021-2/FEA 209 544/1.G...
  • Page 7 GH688,GA628, Standard Electrical Repairs N800 D900 D600 D620 D610 (112) 4/00021-2/FEA 209 544/1.G...

  • Page 8: No Serv Or Can´t Place A Call

    GH688,GA628, Standard Electrical Repairs 2 No serv or can´t place a call. 2.1 Find out if the problem is Tx- or Rx-related. Connect the phone (with signaling program) to a GSM instrument and try to get serv at –68.5dBm signal strength. •...
  • Page 9 GH688,GA628, Standard Electrical Repairs Fig. 2.3 Measure the resistance of C853 (class B, >100 kohms, fig. 2.4). Fig. 2.4 Give the board power and start it up. Measure VVCO (~3.8V) at V451 pad 3 and VRAD (~3.8V) at C457 (fig. 2.5). •...
  • Page 10 GH688,GA628, Standard Electrical Repairs Fig. 2.5 Measure the DC voltage at pin 1 and 2 of G350. The voltage at pin 1 (control volt- age) should always vary between ~0.8V - ~2.8V (usually starts at ~1.7V). The volt- age at pin 2 (feed voltage) also varies but usually starts at ~3.3V (fig. 2.3). •...
  • Page 11 GH688,GA628, Standard Electrical Repairs Fig. 2.6 Check soldering at G300 (fig. 2.5). Measure the resistance of C853 (class B, >100 kohms, fig. 2.4). Measure the resistance of R403 (class B, <1 ohms, fig. 2.6). Measure the resistance of L300 (class A, <1 ohms, fig. 2.6). If the problem isn’t solved, send the phone to the next level.
  • Page 12 GH688,GA628, Standard Electrical Repairs back cover and run the phone through the test again. This applies espe- cially for the GA 628. • If the output power is too low or the Rx-quality value is too high, send the phone to the next level.

  • Page 13: Doesn't Start

    GH688,GA628, Standard Electrical Repairs 3 Doesn’t start. Find out if the phone will start by using the On/Off-button. Insert a fully charged battery and press the On/Off-button. • If the phone doesn’t start, proceed to section 3.2 • If the phone starts, check the charging function by connecting a charger at the system connector.
  • Page 14 GH688,GA628, Standard Electrical Repairs GH688 GA 628 Fig. 3.2 As soon as the problem is solved, send the phone through the flow as usual. (112) 4/00021-2/FEA 209 544/1.G...
  • Page 15 Make a visual check. Make sure that the battery screws are intact and properly mounted, that the isolator sleeve (GH 688) is properly mounted, that the volume keys aren’t stuck and that the system connector isn’t dirty or liquid damaged. Con- tinue at 3.3.
  • Page 16 GH688,GA628, Standard Electrical Repairs Start the phone using the On/Off-key and check the current consumption. • If the phone doesn’t consume any current at all when the On/Off-key is pressed it is most likely liquid damaged. Open the phone and check this. Also check that the keyboard and the keyboard pads are functional and clean.
  • Page 17 GH688,GA628, Standard Electrical Repairs 3.4 Measuring at a powered circuit board. 3.4.1 Doesn’t start in the flash programmer. Open the phone and check for liquid damage. Make sure the system connector pads aren’t burnt. Place the board in the fixture. Start it up and keep it running by keeping DCIO high. Check VDIG and VDSP voltages (~3.2 V, fig.
  • Page 18 GH688,GA628, Standard Electrical Repairs * If that doesn’t help, replace N450 (class A). * If the resistance of any of the voltage sources is too low, send the phone to the next level. Measure the amplitude of B551 pin 3 (class C, >1V t-t) with an oscilloscope, spec- trum analyzer, frequency counter, diode probe…...
  • Page 19 GH688,GA628, Standard Electrical Repairs * If the resistances from any of the voltages to ground are too low, send the phone to the next level. Make sure that there are no faulty solderings on D600, D610 and D620. • If the solderings look good, replace D610 (class A). * If that doesn’t help, first replace D600 (class B) and then D620 (class A).
  • Page 20 Insert the board in the fixture. Start it up and keep it going by keeping DCIO high. Measure the voltage at C692 (~3.1V, fig. 3.2, the figure shows a GH 688 board but the capacitor is placed at the same location).
  • Page 21 GH688,GA628, Standard Electrical Repairs * If the resistance is too high, measure the resistance of R721 (class A, ~0 ohms). * If R721 is correct there is a foil damage and the phone should be discarded. If the fault remains, send the phone to the next level. (112) 4/00021-2/FEA 209 544/1.G...

  • Page 22: Audio

    GH688,GA628, Standard Electrical Repairs 4 Audio. 4.1 Type of fault. Make a call from the phone that is to be tested (later called the phone) to a phone that is working correctly (later called the reference phone). Check the function of the microphone and the earphone. Connect a handsfree unit to the system connector of the phone.
  • Page 23 GH688,GA628, Standard Electrical Repairs Fig. 4.1 Check the solderings of N800 (fig. 4.3). Fig. 4.2 shows the component side of the circuit board. Fig. 4.2 (112) 4/00021-2/FEA 209 544/1.G...
  • Page 24 GH688,GA628, Standard Electrical Repairs Fig. 4.3 If the fault remains, send the phone to the next level. 4.3 Microphone out of order. Open the phone and check for liquid damages, especially around X830 (fig. 4.1) and below J603 (marked area A in fig. 4.2). Clean the system and microphone connector pads if needed.
  • Page 25 GH688,GA628, Standard Electrical Repairs Both the earphone and microphone out of order. Open the phone and check for liquid damages. Make sure there is no dirt or oxide between the components above the system con- nector pads (fig. 4.4 or marked area in fig. 4.5). Check very thoroughly! Fig.
  • Page 26 GH688,GA628, Standard Electrical Repairs * Measure the resistance from X602 pad 5 to ground (>100 kohms). * If it’s too low, make sure there’s no dirt or oxide between the compo- nents in the marked area (fig. 4.5). Clean thoroughly and measure again. Fig.
  • Page 27 GH688,GA628, Standard Electrical Repairs * If the voltages aren’t correct, check the soldering of D600 pin 70 (fig. 4.2). * If the soldering is correct, check the resistance of R601 (~1 kohms, class * If the resistance is correct, replace D600 (class B, fig. 4.2). * If the voltages are correct, check the solderings of N800, D600 and D900 (fig.
  • Page 28 GH688,GA628, Standard Electrical Repairs * If the VANA voltage isn’t correct, proceed to chapter 3 (“Doesn´t start”- fault). * If VANA is correct, check the resistances of R830 (470 ohms), R825 (3.3 kohms) and C835 (>1 kohms, all of class A and in fig. 4.3). •...
  • Page 29 GH688,GA628, Standard Electrical Repairs Both the microphone and the speaker of the handsfree out of order but the ear- phone and the microphone of the phone is working. Open the phone and check for liquid damages, especially within the marked area above the system connector pads in fig.

  • Page 30: Display

    • If the all the segments in the display are “lit” proceed to section 7.4. 5.2 Segments are missing. Open the phone and check for liquid damage. Replace the display. Observe that there are two kinds of display for GH 688. The display is totally empty or the contrast is low.
  • Page 31 The front side of the board is shown in fig. 5.1 Measure the voltages at V608 (class A) and V611 (class A). The GH 688 uses dis- plays of two different brands, Philips and Seiko. Fig. 5.2 and 5.3 shows typical volt- age values for both brands.
  • Page 32 GH688,GA628, Standard Electrical Repairs Applies for KRC 114 279 (Seiko display): Fig. 5.3 All of the values approximately 0.2V . If one or more of the voltages are incorrect, measure the resistance if C633 (class A, >100 kohms, fig. 5.5) and C824 (class A, >25 kohms, fig. 5.2 and 5.3). •...
  • Page 33 GH688,GA628, Standard Electrical Repairs Fig. 5.5 If the problem isn’t solved, send the phone to the next level. Applies for KRC 114 279 (Seiko display): • Make sure that there VLCD (~-2.8V) voltage at H622 pad 5 (fig. 5.5). * If there is no, check the resistances from H622 pad 5 to V611 pin 2 (~0 ohms) and from H622 pad 3 to ground (~0 ohms).
  • Page 34 GH688,GA628, Standard Electrical Repairs Fig. 5.7 Fig. 5.8 All of the values approximately 0.2V . • If any of the values differ, measure the resistance of C633 (class A, >100 kohms, fig. 5.10) and C824 (class A, >25 kohms, fig. 5.8). * If any of the resistances are too low, replace the corresponding capacitor.
  • Page 35 • Try with another display and elastomer. * If it doesn’t help, give the board power and start it up without display. GH 688 Applies for KRC 114 245 and KRC 114 277 (Philips display): Measure the voltages at the display pads H622 (fig. 5.5):...
  • Page 36 GH688,GA628, Standard Electrical Repairs • If VLCD voltage is missing, proceed to section 5.3. • If the I C-DATA or the I C-CLOCK voltages are missing, check VDIG (~3.2V). * If VDIG is incorrect, proceed to chapter 3 (“Doesn’t start”-fault). * If VDIG is correct, measure the resistances of R619 (class A, 2.2 kohms), R620 (class A, 2.2 kohms), R668 (class A, 10 kohms) and R669 (class A, 10 kohms).
  • Page 37 GH688,GA628, Standard Electrical Repairs GA 628 Measure the voltages at the display pads H624 (fig. 5.10): Pad # Used for Voltage VLCD ~5.4V VDIG ~3.2V VDIG ~3.2V ~3.2V C Data ~3.2V C Clock Table 5.3 • If VLCD is incorrect, proceed to section 5.3. •...

  • Page 38: Charging

    GH688,GA628, Standard Electrical Repairs 6 Charging. 6.1 Kind of charging fault. Do a visual check of the battery screws and system connector. Replace if needed. Start the phone with a fully charged battery using the On/Off key. • If it doesn’t start, proceed to chapter 3 (“Doesn´t start”-fault). •...
  • Page 39 GH688,GA628, Standard Electrical Repairs 6.2 Indicates charging without a charger. Open the phone and check for liquid damages. The component side of the circuit board is shown in fig. 6.1. Fig. 6.1 Give the board power and start it with the On/Off key. Check the voltages VDIG (~3.2V), VRAD (~3.8V, fig.
  • Page 40 GH688,GA628, Standard Electrical Repairs 6.3 Doesn’t start when charger is inserted. Open the phone and check for liquid damage. Check the pads at the system connector for oxidation and burn damages, especially on pad 10 (GND, fig. 6.4). Fig. 6.4 Measure the resistance from DCIO to VBATT (~390 ohms, fig.
  • Page 41 GH688,GA628, Standard Electrical Repairs * If the resistance is too high there is a foil damage and the phone is to be discarded. Fig. 6.6 Check the resistance from GND (pad 10) to AGND (pad 4) at the system connector (~0 ohms, fig.
  • Page 42 GH688,GA628, Standard Electrical Repairs Check the resistance from GND (pad 10) and AGND (pad 4, fig. 6.5) at the system connector pads (~0 ohms). • If the resistance is too high there is a foil damage and the phone is to be dis- carded.

  • Page 43: Sim Fault ("Insert Card")

    GH688,GA628, Standard Electrical Repairs 7 SIM fault (“Insert card”). 7.1 Definition of SIM-fault. Insert a working SIM card and a fully charged battery into the phone. • If the display says “Wrong card” or “Insert correct card” when you start the phone it means that the phone is SIM-locked and cannot be repaired at this level.
  • Page 44 GH688,GA628, Standard Electrical Repairs Fig. 7.2 Fig. 7.3 7.3 Voltage at VSIMPAD is missing. Open the phone and check for liquid damages, especially below the SIM-card (J603, fig. 7.4). (112) 4/00021-2/FEA 209 544/1.G...
  • Page 45 GH688,GA628, Standard Electrical Repairs Fig. 7.4 Measure the resistance of R724 (class A, ~47 ohms, fig. 7.5). Fig. 7.5 Give the circuit board power and start it up. Measure the input voltage at N705 pin 2 (~3.1V, fig. 7.4). • If the voltage is too low or missing, check the VDIG voltage (~3.2V) at N702 pin 5 or at C600 (fig.
  • Page 46 GH688,GA628, Standard Electrical Repairs Fig. 7.6 * If VDIG is too low, measure the resistance to ground. * If it’s more than 500 ohms, replace N702 (class A). * If it’s less than 500 ohms, send to next level. * If VDIG is correct, measure the resistance of R716 (class A, ~4.7 ohms, fig. 7.5).
  • Page 47 GH688,GA628, Standard Electrical Repairs Make sure that the SIM-card holder is properly soldered. Make sure the SIM-card holder pads aren’t loose (if they are, then the phone should be discarded due to foil damage) and that the board leads are intact. Measure the resistance of R704 (class A, ~100 kohms, fig.

  • Page 48: Keyboard

    8.2. Press all the keys (including the volume keys on the GH 688) to check which of the keys that are faulty. The following is the easiest way to check the keyboard: 1.
  • Page 49 GH688,GA628, Standard Electrical Repairs Fig. 8.1 Clean the pads thoroughly. Measure the resistance from V+ to GND. • If the resistance is more than 25 kohms, replace the flex film for the volume keys. Assemble the phone and check if the volume keys work according to 8.1. * If not, replace D600 (class B, fig.
  • Page 50 GH688,GA628, Standard Electrical Repairs 8.3 One or more keys faulty. Open the phone and check for liquid damage, especially around the keys that are faulty. Clean the keyboard pads thoroughly and assemble the phone with a new keyboard. Check functionality according to 8.1. If it didn’t help, open the phone, give it power and start it up.
  • Page 51 GH688,GA628, Standard Electrical Repairs Fig. 8.4 • If VDIG is correct, check if there is correct voltage (~3.2V) at marked sides on the pads of the faulty keys (GH 688 shown on fig. 8.5, GA 628 on fig. 8.6). (112) 4/00021-2/FEA 209 544/1.G...
  • Page 52 GH688,GA628, Standard Electrical Repairs GH 688 Fig. 8.5 Crossed out pads are not in use. (112) 4/00021-2/FEA 209 544/1.G...
  • Page 53 GH688,GA628, Standard Electrical Repairs GA 628 Fig. 8.6 Crossed out pads are not in use. If there is no voltage at a whole row according to fig. 8.5/8.6 (for instance 1, 2, 3, Yes2), measure the resistance of that row’s resistor (R630, R631, R632, R633 and R634, fig.
  • Page 54 GH688,GA628, Standard Electrical Repairs Fig. 8.7 • If the resistance is correct, measure the resistance from C600 (fig. 8.2) to marked side of the resistors of the row (R630-R634, in this case R630, should be ~0 ohms) and from the other side of the resistor to the marked side of the keyboard pads (~0 ohms).

  • Page 55: Illumination And Buzzer

    GH688,GA628, Standard Electrical Repairs 9 Illumination and buzzer. 9.1 Kind of fault. Insert a dummy battery and a SIM card into the phone, press the On/Off-key and wait for the phone to get serv (instrument or net). • If the phone doesn’t beep when starting up, go to Menu/Setting/Ring level (Menu/Ring level at the GA 628) and try to raise the ring level to full.
  • Page 56 GH688,GA628, Standard Electrical Repairs Fig. 9.1a Fig. 9.1b Make sure the buzzer, H600 (class A, fig. 9.1a) is properly soldered. • If solderings are correct, replace the buzzer. Assemble the phone and test the buzzer again according to 9.1. * If the problem is solved, send the phone through the usual flow. If the fault remains, disassemble the phone.
  • Page 57 GH688,GA628, Standard Electrical Repairs Fig. 9.2 • If the voltage is missing at H600 pad 1, measure VRPAD (~3.8V) at V706 pad 2 (class A, fig. 9.2). * If the voltage at V706 pad 2 is missing, check if VRPAD is at C453 (fig. 9.3).
  • Page 58 GH688,GA628, Standard Electrical Repairs * If the resistance is too high there is a foil damage and the phone should be discarded. * If VRPAD at V706 pad 2 is correct, measure the resistance from VBATT to V706 pad 3 (~4.7 ohms, fig. 9.2) * If the resistance is too high, replace R652 (class A, fig.
  • Page 59 GH688,GA628, Standard Electrical Repairs • If the resistance is ~0 ohms at least one of them is shorted out. The simplest way of finding out which one of them is shorted out is by looking underneath the LED like in fig. 9.5. You can usually see dirt beneath the LED that is causing the short circuit.
  • Page 60 GH688,GA628, Standard Electrical Repairs Table 9.1 shows symptoms when the resistance of the resistors are incorrect. Missing or H651- H655- broken H654 H660 R606 Faintly Not lit glowing R611 Not lit R612 Not lit Faintly glowing R610 Not lit Table 9.1 •...
  • Page 61 GH688,GA628, Standard Electrical Repairs 9.5 Green LED at the topindicator doesn’t work. Open the phone and check for liquid damage. The front side of the board is shown in fig. 9.1. Make sure the double LED H650 (class A, fig. 9.1) is correctly soldered. •...
  • Page 62 GH688,GA628, Standard Electrical Repairs * If VRPAD is incorrect or missing, proceed to chapter 3 (“Doesn´t start”- fault). * If the voltage at C453 is correct, check the resistance from C453 and V706 pad 2 (~0 ohms). * If the resistance is too high there is a foil damage and the phone should be discarded.

  • Page 63: Rtc

    GH688,GA628, Standard Electrical Repairs 10 RTC 10.1 Find fault. Insert a SIM card and a fully charged battery into the phone and start it up. Set the correct time. Remove the battery and reinsert it after a minute. • If the time says 00:00 proceed to section 10.2. Compare to the correct time.
  • Page 64 GH688,GA628, Standard Electrical Repairs Fig. 10.2 If it is, replace it. Assemble the phone, start it and set the correct time. Wait a few minutes for the backup capacitor to charge. Remove the battery and reinsert it after a minute. Check if the error is fixed (the backup capacitor needs a few hours of charging to reach full capacity).

  • Page 65: Component Lists

    GH688,GA628, Standard Electrical Repairs 11 Component lists 11.1 Explanation 11.1.1 Mounting drawing table The Mounting drawings show the components placements (Pos) at the printed board. The Mounting drawings are not included in this document. 11.1.2 Component list Position: The components position number at the board. Designation: Description of the component.

  • Page 66: Mounting Drawing Tables

    GH688,GA628, Standard Electrical Repairs 11.2 Mounting drawing tables GH688 Board part 2/ROA 117 3307/1 R1A - R2A - R3B. 2/ROA 117 3307/3 R3A - 2/ROA 117 3307/4 2/ROA 117 3307/5 2/ROA 117 3307/6 R3B - Mounting 1078-2/ROA 117 3307/1 Rev D Rev E RevF Rev J...

  • Page 67: Component List Gh688

    GH688,GA628, Standard Electrical Repairs 11.3 Component list GH688 2/ROA 117 3307/1, 2/ROA 117 3307/3, 2/ROA 117 3307/4, 2/ROA 117 3307/5, 2/ROA 117 3307/6 GH688 Designation Part No. Note B600 QUARTZ CRYS- RTM 501 661/01 Verify Real Time Clock function C100 CAPACITOR RJC 463 3022/33 C101...
  • Page 68 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note C223 CAPACITOR RJC 463 3022/33 C224 CAPACITOR RJC 463 3021/1 C225 CAPACITOR RJC 463 3021/1 C226 CAPACITOR RJC 463 3022/33 C227 CAPACITOR RJC 463 3021/33 C230 CAPACITOR RJC 464 3024/1 C231 CAPACITOR RJC 464 3024/1 C234...
  • Page 69 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note C405 CAPACITOR RJC 463 3021/39 C406 CAPACITOR RJC 463 3022/33 C407-C409 CAPACITOR See revision change table C421 CAPACITOR RJC 463 3022/33 C422 CAPACITOR See revision change table C423 CAPACITOR RJC 463 3022/33 C424 CAPACITOR RJC 463 3022/33...
  • Page 70 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note C513 CAPACITOR RJC 464 3024/1 C518 CAPACITOR RJC 464 3025/1 C530 CAPACITOR RJC 463 3022/56 C540 CAPACITOR RJC 464 3025/1 C541 CAPACITOR RJC 464 3025/1 C542 CAPACITOR RJC 464 3025/1 C543 CAPACITOR RJC 464 3025/1 C544...
  • Page 71 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note C648 CAPACITOR Not mounted C650 CAPACITOR RJC 463 3022/33 Verify handsfree earphone func- tion C651 CAPACITOR RJC 463 3022/33 Verify handsfree mic function C652 CAPACITOR See revision change table C656-C659 Not mounted Not mounted C660 CAPACITOR...
  • Page 72 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note C802-C808 CAPACITOR See revision change table C810 CAPACITOR RJC 464 3035/33 Verify handsfree mic function C812 CAPACITOR RJC 464 3035/68 Verify handsfree mic function C813 CAPACITOR RJE 599 2107/15 Verify handsfree earphone func- tion C814 CAPACITOR...
  • Page 73 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note F603 VARISTOR See revision change table Verify portable handsfree func- tion F604 VARISTOR See revision change table Verify vehicle handsfree function F605 VARISTOR See revision change table Verify flash function H600 BUZZER KLJ 107 08/2 H622...
  • Page 74 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note N350 MICROCIRCUIT RYT 102 6054/1 N450 MICROCIRCUIT RYT 113 6072/2 N701 MICROCIRCUIT RYT 113 6095/1 N702 MICROCIRCUIT RYT 113 6095/1 N705 MICROCIRCUIT RYT 113 048/C N706 MICROCIRCUIT RYT 113 6071/5 Verify Real Time Clock function R220 RESISTOR REP 622 454/47...
  • Page 75 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note R452 RESISTOR REP 622 456/1 R453 RESISTOR REP 622 454/27 R454 RESISTOR See revision change table R455 RESISTOR REP 622 451/22 R456 RESISTOR REP 622 455/33 Verify charging function R460 RESISTOR REP 622 457/1 R464 RESISTOR...
  • Page 76 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note R620 RESISTOR REP 622 454/22 R621 RESISTOR REP 622 455/1 R622 RESISTOR REP 622 454/1 Verify flash function R623 RESISTOR See revision change table Verify SIM function R625 RESISTOR REP 622 453/47 Verify flash function R627 RESISTOR...
  • Page 77 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note R703 RESISTOR See revision change table R704 RESISTOR REP 622 456/1 Verify SIM function R707 RESISTOR See revision change table R708 RESISTOR See revision change table Verify On/Off-function R709 RESISTOR See revision change table R716 RESISTOR REP 622 451/47...
  • Page 78 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note R903 RESISTOR REP 622 455/1 R904 RESISTOR REP 622 454/1 R905 RESISTOR REP 622 455/1 R906 Not mounted Not mounted R907 RESISTOR REP 622 456/1 R908 RESISTOR REP 622 456/1 R909 RESISTOR REP 622 456/1 R910...
  • Page 79 GH688,GA628, Standard Electrical Repairs GH688 Designation Part No. Note V701 TRANSISTOR RYN 121 6069/1 Verify On/Off-function V702 DIODE RKZ 123 647/1 Verify On/Off-function V704 TRANSISTOR RYN 120 647/1 Verify On/Off-function V705 TRANSISTOR RYN 120 647/1 Verify SIM function V706 TRANSISTOR RYN 121 6086/1 V708-V709 TRANSISTOR See revision change table...

  • Page 80: Revision Change Tables Gh688

    GH688,GA628, Standard Electrical Repairs 11.3.1 Revision change tables GH688 Revision change table for 2/ROA 117 3307/1 and 2/ROA 117 3307/5 2/ROA 117 3307/3 2/ROA 2/ROA 2/ROA 1173307/1 1173307/5 1173307/3 Revisions Part number Revisions Part number C112 Up to R2A RJC 463 3022/33 C112 All revisions RJC 464 3024/1 C112 R2B and higher RJC 464 3024/1...
  • Page 81 GH688,GA628, Standard Electrical Repairs 2/ROA 2/ROA 2/ROA 1173307/1 1173307/5 1173307/3 Revisions Part number Revisions Part number C629 All revisions RJC 463 3022/22 C629 All revisions RJC 463 3022/22 C643 All revisions Not mounted C643 All revisions Not mounted C644 All revisions Not mounted C644 All revisions Not mounted...
  • Page 82 GH688,GA628, Standard Electrical Repairs 2/ROA 2/ROA 2/ROA 1173307/1 1173307/5 1173307/3 Revisions Part number Revisions Part number D600 All revisions ROP 101 678/2C R2A D600 All revisions ROP 101 678/2C R2A When replacing When replacing D600 on revisions D600 on revisions R2B, R3A and R2B, R3A and R4A, pos.
  • Page 83 GH688,GA628, Standard Electrical Repairs 2/ROA 2/ROA 2/ROA 1173307/1 1173307/5 1173307/3 Revisions Part number Revisions Part number R451 R3B REZ 401 0054/47 R454 Up to R1C REP 622 001/0 R454 All revisions Not mounted R454 R2A and higher Not mounted R520 Up to R3A REP 622 001/0 R520 Up to R3A REP 622 001/0...

  • Page 84: Revision Change Table For 2/Roa 117 3307/4

    GH688,GA628, Standard Electrical Repairs Revision change table for 2/ROA 117 3307/4 2/ROA 11 73307/6 2/ROA 117 3307/4 2/ROA 117 3307/6 Revisions Part number Revisions Part number C112 All revisions RJC 464 3024/1 C112 All revisions RJC 464 3024/1 C407 All revisions RJC 463 3021/56 C407 All revisions RJC 463 3021/56...
  • Page 85 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3307/4 2/ROA 117 3307/6 Revisions Part number Revisions Part number C644 All revisions RJC 464 3025/1 C644 All revisions Not mounted C647 All revisions RJC 464 3025/1 C647 All revisions Not mounted C652 All revisions Not mounted C652 All revisions RJC 463 3022/33...
  • Page 86 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3307/4 2/ROA 117 3307/6 Revisions Part number Revisions Part number F601 All revisions REY 203 08/1 F601 All revisions REY 203 08/1 F603 All revisions REY 203 08/1 F603 All revisions REY 203 08/1 F604 All revisions REY 203 08/1 F604 All revisions...
  • Page 87 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3307/4 2/ROA 117 3307/6 Revisions Part number Revisions Part number R834 All revisions Not mounted R834 All revisions REP 622 455/1 V404 All revisions Not mounted V404 R4A RKZ 323 650/1 V404 Other than R4A Not mounted V405 All revisions Not mounted V405 R4A...

  • Page 88: Component List Ga628

    GH688,GA628, Standard Electrical Repairs 11.4 Component list GA628 2/ROA 117 3308/1, 2/ROA 117 3308/2, 2/ROA 117 3308/3 2/ROA 117 3308/4, 2/ROA 117 3308/5, 2/ROA 117 3308/7 GA628 Designation Product nuber Note C100 CAPACITOR RJC 463 3022/33 C101 CAPACITOR RJC 463 3022/33 C102 CAPACITOR RJC 463 3022/33...
  • Page 89 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note C255 CAPACITOR RJC 464 3024/1 C300 CAPACITOR RJC 496 2047/1 C301 CAPACITOR RJC 464 3024/1 C302 CAPACITOR RJC 464 3024/1 C310 CAPACITOR RJC 464 3025/1 C311 CAPACITOR RJC 463 3022/33 C350 CAPACITOR RJC 464 3025/1 C351...
  • Page 90 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note C453 CAPACITOR RJE 599 1167/33 C454 CAPACITOR RJE 599 1167/33 C455 Not mounted Not mounted C456 CAPACITOR RJC 464 3025/1 C457 CAPACITOR See revision change table C458 CAPACITOR RJC 463 3022/47 C459 CAPACITOR RJC 464 3024/82...
  • Page 91 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note C616 CAPACITOR See revision change table Verify flash function C623 CAPACITOR See revision change table Verify SIM function C625 CAPACITOR See revision change table C626 CAPACITOR RJC 464 3035/68 Verify SIM function C627 CAPACITOR RJC 463 3022/22...
  • Page 92 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note C667 CAPACITOR RJC 464 3025/1 Verify charging function C668 CAPACITOR RJC 464 3035/68 Verify display function C669-C672 Not mounted Not mounted C674 Not mounted Not mounted C677-C679 Not mounted Not mounted C680 CAPACITOR RJC 464 3023/33...
  • Page 93 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note C840 CAPACITOR RJC 463 3022/33 Verify earphone function C841 CAPACITOR RJC 463 3022/33 Verify earphone function C842 Not mounted Not mounted C850 CAPACITOR RJC 464 3035/68 Verify mic function C851 CAPACITOR RJC 464 3035/68 Verify mic function C853...
  • Page 94 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note L250 CHOKE REG 704 2153/15 L251 CHOKE REG 704 2153/15 L252 INDUCTOR REG 704 273/33 L300 FILTER REG 706 06/1 L350 INDUCTOR REG 704 274/22 L351 FILTER REG 706 06/1 L400 CHOKE REG 704 212/27 L401...
  • Page 95 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note R317 RESISTOR REP 622 452/56 R351 RESISTOR REP 622 452/1 R352 RESISTOR REP 622 452/1 R356 RESISTOR REP 622 455/12 R357 RESISTOR REP 622 455/22 R358 RESISTOR REP 622 455/22 R359 RESISTOR REP 622 452/47 R400...
  • Page 96 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note R600 RESISTOR REP 622 452/33 Verify SIM function R601 RESISTOR REP 622 454/1 Verify portable handsfree func- tion R602 RESISTOR REP 622 453/47 Verify vehicle handsfree function R604 RESISTOR REP 622 455/22 Verify flash function R605 RESISTOR...
  • Page 97 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note R652 RESISTOR REP 622 451/47 R653 RESISTOR REP 624 652/1 R662 RESISTOR REP 622 001/0 Verify keyboard function R663 RESISTOR REP 622 001/0 Verify keyboard function R664 RESISTOR See revision change table R666 RESISTOR See revision change table...
  • Page 98 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note R823 RESISTOR REP 622 456/1 R825 RESISTOR REP 622 654/33 Verify handsfree mic function R830 RESISTOR REP 622 453/47 Verify handsfree mic function R831 RESISTOR See revision change table R833 Not mounted Not mounted R834 RESISTOR...
  • Page 99 GH688,GA628, Standard Electrical Repairs GA628 Designation Product nuber Note V615 DIODE RKZ 123 646/1 Verify display function V700 TRANSISTOR RYN 122 625/1 Verify SIM function V701 TRANSISTOR RYN 121 6069/1 Verify On/Off-function V702 DIODE RKZ 123 647/1 Verify On/Off-function V704 TRANSISTOR RYN 120 647/1 Verify On/Off-function...

  • Page 100: Revision Change Tables Ga628

    GH688,GA628, Standard Electrical Repairs 11.4.1 Revision change tables GA628 Revision change table for 2/ROA 117 3308/1 2/ROA 117 3308/2 2/ROA 117 3308/1 2/ROA 117 3308/2 Revisions Product number Revisions Product number C112 Up to R2A RJC 463 3022/33 C112 All revisions RJC 464 3024/1 C112 R2B and higher RJC 464 3024/1 C213 Up to R2A...
  • Page 101 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/1 2/ROA 117 3308/2 Revisions Product number Revisions Product number C616 Up to R2B RJC 464 3035/68 C616 Up to R2B RJC 464 3035/68 C616 R3A and higher RJC 496 2047/1 C616 R3A and higher RJC 496 2047/1 C623 All revisions Not mounted C623 All revisions...
  • Page 102 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/1 2/ROA 117 3308/2 Revisions Product number Revisions Product number F603 R3A and higher Rey 203 08/1 F604 Up to R2B Not mounted F604 R2B Not mounted F604 R3A and higher REY 203 08/1 F604 R3A and higher REY 203 08/1 F605 Up to R2B Not mounted...
  • Page 103 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/1 2/ROA 117 3308/2 Revisions Product number Revisions Product number R703 All revisions REP 622 001/0 R703 All revisions REP 622 001/0 R707 All revisions REP 622 001/0 R707 All revisions REP 622 001/0 R708 All revisions REP 622 456/1 R708 All revisions...

  • Page 104: Revision Change Table For

    GH688,GA628, Standard Electrical Repairs Revision change table for 2/ROA 117 3308/3 2/ROA 117 3308/4 2/ROA 117 3308/3 2/ROA 117 3308/4 Revisions Product number Revisions Product number C112 All revisions RJC 464 3024/1 C112 All revisions RJC 464 3024/1 C213 All revisions RJC 463 3021/47 C213 All revisions RJC 463 3021/47...
  • Page 105 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/3 2/ROA 117 3308/4 Revisions Product number Revisions Product number C625 All revisions Not mounted C625 Up to R3B Not mounted C625 R4A and higher RJC 463 3022/22 C629 All revisions RJC 463 3022/22 C629 Up to R3B RJC 463 3022/22 C629 R4A and higher Not mounted...
  • Page 106 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/3 2/ROA 117 3308/4 Revisions Product number Revisions Product number C902 All revisions RJC 464 3035/68 C902 Up to R3B RJC 464 3035/68 C902 R4A and higher RJC 464 3025/1 C903 All revisions RJC 464 3035/68 C903 Up to R3B RJC 464 3035/68 C903 R4A and higher RJC 464 3025/1...
  • Page 107 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/3 2/ROA 117 3308/4 Revisions Product number Revisions Product number R243 R3A REP 622 453/22 R243 R3A REP 622 453/22 R243 R3B REP 622 453/18 R243 R3B and higher REP 622 453/18 R401 R3A REP 622 453/12 R401 R3A REP 622 453/12...
  • Page 108 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/3 2/ROA 117 3308/4 Revisions Product number Revisions Product number R834 All revisions REP 622 455/1 R834 R4A and higher Not mounted V404 R5A, R5B RKZ 323 650/1 V404 All revisions Not mounted V404 Other than Not mounted R5A, R5B V405 R5A, R5B...

  • Page 109: Revision Change Table For 2/Roa 117 3308/5, 2/Roa 117 3308/7

    GH688,GA628, Standard Electrical Repairs Revision change table for 2/ROA 117 3308/5 2/ROA 117 3308/7 2/ROA 117 3308/5 2/ROA 117 3308/7 Revisions Product number Revisions Product number C112 All revisions RJC 464 3024/1 C112 R3B RJC 464 3024/1 C213 All revisions RJC 463 3021/47 C213 R3B RJC 463 3021/47...
  • Page 110 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/5 2/ROA 117 3308/7 Revisions Product number Revisions Product number C666 All revisions RJC 464 3025/1 C666 R3B RJC 464 3025/1 C701 All revisions RJC 464 3025/1 C701 R3B Not mounted C711 All revisions Not mounted C711 R3B RJC 464 3024/12...
  • Page 111 GH688,GA628, Standard Electrical Repairs 2/ROA 117 3308/5 2/ROA 117 3308/7 Revisions Product number Revisions Product number R451 All revisions REZ 401 0054/47 R451 R3B REZ 401 0054/47 R454 Up to R1D REP 622 001/0 R454 R3B Not mounted R454 R2A and higher Not mounted R520 All revisions Not mounted R520 R3B...
  • Page 112 GH688,GA628, Standard Electrical Repairs (112) 4/00021-2/FEA 209 544/1.G...

This manual is also suitable for:

Ga 628

Table of Contents