GSM TELEPHONE SGH-A500 SERVICE GSM TELEPHONE Manual CONTENTS 1. Specification 2. Exploded Views and Parts List 3. Electrical Parts List 4. Block Diagram 5. PCB Diagrams 6.
ELECTRONICS ⓒ Samsung Electronics Co.,Ltd. November. 2002 Printed in Korea. Code No.: GH68-03059A BASIC.
1. SGH-A500 Specification 1. GSM General Specification GSM900 P h a se 1 E GS M 9 0 0 Ph a s e 2 D CS 1 8 0 0 Ph a s e 1 Fr eq . B a n d [M H z ] Uplink/Downlink 890~ 915 935~ 960 8 8 0 ~9 1 5 9 2 5 ~9 6 0 1 7 1 0 ~1 7 8 5 1 8 0 5 ~1 8 8 0 A R F C N r an g e 1~ 124 0 ~ 1 2 4 & 9 7 5 ~1 0 2 3 5 1 2 ~8 8 5 Tx / R x s p aci n g 45MHz 45MHz 95MHz M o d . B i t r at e/ B i t Pe r i o d 2 7 0 .8 3 3 k b p s 3 .6 9 2 u s 270.833kbps 3.692us 270.833kbps 3.
SGH-A500 Specification 2.
2. SGH-A500 Exploded View and its Parts list 1.
SGH-A500 Exploded view and its Part list 2. Cellular phone Parts list Location Description NO.
SGH-A500 Exploded view and its Part list 3. Test Jig (GH80-01326A) 3-1. RF Test Cable 3-2. Test Cable (GH39-00172A) 3-3. Serial Cable (GH39-00171A) 3-4. Power Supply Cable 3-5. DATA CABLE (PCB086LBE) 3-6. TA (GH44-00171A) 3-7.
3. SGH-A500 MAIN Electrical Parts List Level SEC Code Design LOC Descriptions 0 1 GH92-01299A GH41-00259A GH71-00846A 2203-000995 PBA MAIN-SGHA500 REV1.9B BOM PCB-SGHA500;SGH-A500,FR-3,6L,-,1.00T,100X155 NPR-ANT CONTACT;-,SGH-A500,C1720C,T0.1,4.35 C-CERAMIC,CHIP;0.
SGH-A500 Electrical Parts List Level 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 SEC Code Design LOC C246,C248,C605, 2203-005796 C606 2203-006090 C249,C601,C602 2203-003027 C250 2203-005065 C301 2203-005050 C302 2203-005482 C303,C310,C315, C317 2203-005717 C304,C305,C306, C307 2203-005480 C311 2203-005509 C313 2203-000438 C316 2203-000628 C318 C319,C321,C325, 2203-000679 C439 2203-005717 C320 2203-000885 C330 2203-000854 C401 2203-005061 C404,C408,C410, C413 2203-002525 C407 24
SGH-A500 Electrical Parts List Level SEC Code 1 1 3710-001866 3711-005151 3710-001611 3709-001187 3705-001242 0404-001186 2011-001417 4709-001144 2011-001419 2011-001363 2904-001382 2904-001383 2904-001397 2703-002198 1 3301-001362 L103,L213 1 2703-002369 L104 1 3301-001336 L105,L601 1 1 2703-001802 2703-001944 2703-001544 2703-001737 2703-001233 2703-001178 2703-001970 2703-001685 2703-000172 0601-001540 0601-001402 1 0601-001547 1 0601-001547 1 0601-001547 1 0601-001547 1 0601-0015
SGH-A500 Electrical Parts List Level SEC Code Design LOC Descriptions 1 1 2809-001264 2801-003856 0504-001133 0504-001134 0502-001201 0504-001122 2007-001298 OSCILLATOR-VCTCXO;13MHZ,-,10KOHM//10PF,TP, CRYSTAL-SMD;0.
SGH-A500 Electrical Parts List Level SEC Code Design LOC 1 2007-000170 R452 R501,R503,R522, 2007-001290 R523 2007-007014 R506 2007-001307 R512,R513,R520, R521 2007-001307 R524,R525,R526, R527 R528,R529,R530, 2007-001307 R531 2007-000138 R567 2007-003030 R568 2007-007483 R602 2007-008500 R606 2007-000157 R609 2007-008117 R611 2909-001174 U101 1 1209-001429 U102 1 1201-001754 U103 1 1 0504-001130 U104,U105,U605 1205-002203 U201 1 1109-001207 U302 1 1 1204-001811 U303 0902-001560 U401 1 1202-0
4. SGH-A500 Block Diagram IF SAW FILTER(360MHz) VC-TCXO-208C AFC VT vcc VRF2 TCXO(13MHz) Tx1800_Rx900 Switchplexer State H L EGSM_Tx H H DCS_Rx L L L H DCS_Tx H L H L H L EGSM_Rx NO R-Tx L H L H out GND GND MO LNA900 PLLON E-GOLD+(PMB2880) EPP1 2 EPN1 DAC F32K TEMP IFPLL BBPGC VCC4/5 HBT ATTENUATER -7dB RX3X PCF5079HK A ADC MIXI TX_POWER ADC AX A51/52 ATTENUATER -1dB TIC_FD MIXIX TX-Mixer Div.
5. SGH-A500 PCB Diagrams 1.
SGH-A500 PCB Diagrams 2.
6. SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 1. Power On "power on" does not work check the current consumption No check the current consumption more than about 30mA < I < 500mA ? No 1A ? Yes Yes Check the Parts connected with Vbat directly Check the Battery voltage No Charge the Battery more than 3.3V ? Yes Check the Output voltage of E-power(U601).; -VANA(pin #3) = 2.39V No -VINT(pin #24) = 2.62V Check the U601 -VSIM(pin #21) = 2.85V -V3V(pin #22) = 2.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 2. Initial Initial Failure check the signal at the pin 17 of U601 is "Low → H igh" when the phone is boot on No Check the U601 Yes Check the pin 38 of U601 is "High" No Check the U 401 Yes Check the pin 4 of OSC202 is around 2.85V No Check & resolder the OSC202, R221, U601 Yes Check the LCD connector CN302, L CD FPCB assembly status No Re solder CN302, Re-assembly LCD F PCB Yes END 3.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 4. Charging Part Abnormal charging part check the pin #17,18 of CN303; -" TA+" is >= 5V No Replace TA & Check the CN 303 Yes Check the pin #4 of U601 ; low ? No Check the U 601 Yes Check the pin #3 of Q601 ; low? No Check the Q601 Yes Check the pin #5 of U602 ; 3.2V ~ 4.2V ? No Check the U 602 Yes END 5.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 6. Speaker Part Speaker does not work No Check the soldering status of Resolder of speaker's wire s peaker inside LCD module Yes No Check C430,C431 Resolder of C430,C431 (Audio Signal passes Yes through this capacitor) No Resolder of C430,C431 (Audio Signal passes Check R403,R404 through this capacitor) Yes No Can you see any audio signal from C430,C431? This is the defect of E-Gold+.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 7. Backlihgt PART Back Light dos e not work Check the soldered status of the L ED PAD Yes No Check the soldered status of the Solder the LED again or Replace the LED LED PAD Yes No Back Light (Menu4.4.1)"Short or Select backlight "Short or Long" mode Long" mode in the menu? Yes Backlight turn on. No Check the LCD Connector Check the pin 11 of 16 (CN302 ) Replace the FPCB High(2.6V) == ? Yes Backlight turn on.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 8.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 9. GSM Reciever 1. Phone Tool Inline Mode : - RF Mode : Rx Continuous. - ARFCN : Rx 62Ch. - Gain : Rx 88. 2. Generator RF Level :-50dBm. 3. Measure with Hewlett Packard 85024A active high frequency probe. → Measured Value is dependent on Probe Measured Point of Component. ●Flow Chart.(GSM : Rx Trouble Shooting) No Check RF(947.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 10. GSM transmitter CONTINUOUS Tx ON CONDITION U201 PIN 7&19=2.8V? NO U601 CHECK/ CHANGE CH : 62 Tx POWER LEVEL : 10 RBW : 300KHz VBW : 300KHz ATT. : 30dB YES OSC202 CHECK/ CHANGE YES OSC202 PIN4=2.8V? OSC202 PIN3>13MHz 2.5Vrms? NO NO U201 PIN25=1.6~ 1.8Vpp? YES U601 CHECK/ CHANGE OSC201 CHECK/ CHANGE NO OSC101 YES NO PIN6>9 OSC101 dBm(902.4MHz PIN5=2.8V? )? YES YES OSC201 NO PIN7=2.8V? OSC201 PIN1=(1326.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 11. DCS Reciever 1. Phone Tool Inline Mode : - RF Mode : Rx Continuous. - ARFCN : Rx 711Ch. - Gain : Rx 88. 2. Generator RF Level :-50dBm. 3. Measure with Hewlett Packard 85024A active high frequency probe. → Measured Value is dependent on Probe Measured Point of Component. ● Flow Chart.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 12. DCS transmitter CONTINUOUS Tx ON CONDITION U201 NO PIN 7&19=2.8V? U601 CHECK/ CHANGE CH : 698 Tx POWER LEVEL : 5 RBW : 300KHz VBW : 300KHz ATT. : 30dB YES OSC202 CHECK/ CHANGE YES OSC202 PIN4=2.8V? NO OSC202 PIN3=13MHz 2.76Vrms? NO U201 PIN25=1.3~ 1.5Vpp? YES U601 CHECK/ CHANGE OSC201 CHECK/ CHANGE NO YES OSC201 PIN7=2.8V? OSC101 PIN10>5 dBm(1747.4 MHz)? YES NO NO NO OSC201 PIN1=1323.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 13. RF Circuit Diagram A 1 VRF1 DCS_R X 1 3 TX900_RX180 0 4 GND DCS_RX VC2 3 11 4 C101 47PF 2 22 U101 12 U105 2 VC1 ANT1 1 GSM_RX 10 3 4 GSM_RX 5 6 1 3 DCS_TX GND 4 GND ANT 5 GSM_TX 9 L104 1.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 14. RF Tranceiver Circuit Diagram 1 2 3 4 5 6 7 8 VRF2 A A R221 22,5% VRF1 C234 6.8PF G3 OUT2 (COIL) 2 OUT1 EC 3 L218 82nH C232 5.6pF C220 1PF 6 L203 27nH L202 27nH C236 5.6pF F204 L206 8.2uH C204 100NF IN2 L204 39nH C228 6.8PF OUT VCC 3 4 VT 1 2 AFC GND R212 10K L210 NC 7 1 OSC202 G2 IN1 G1 8 4 C239 820PF C241 330PF 5 VRF1 C222 10NF R226 22K B R215 1.8K R204 C248 2.2UF X7R TYPE R218 6.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 15.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 16.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 17. Key Matrix & LED Circuit Diagram 1 2 3 4 5 6 7 VOL_U P 2 KP6 2 1 2 KEY04 1 8 1 2 KEY02 KP1 1 KEY06 A 5 4 3 0 2 1 KEY05 VOL_DOWN 2 1 KEY1 0 2 1 KEY1 1 2 1 KEY12 2 2 1 KEY1 3 2 1 KEY14 2 1 KEY15 2 2 1 KEY1 6 2 1 KEY1 7 2 1 KEY18 2 1 KEY1 9 2 1 KEY2 0 2 VOL_UP 1 KEY0 8 VBAT 1 VOL_D N LED13 C510 5.
SGH-A500 Flow Chart of Troubleshooting and Circuit Diagrams 18. Power Management Circuit Diagram 1 2 3 4 5 6 7 8 VBAT A A C615 2.2UF 16V VINT C614 100UF 6.3V R606 0.
