Samsung SGH-E700 Service Manual Download Page 43

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This Document can not be used without Samsung's authorization

SGH-E700 Flow Chart of Troubleshooting

33uF

2% Coilcraft

HN/C3

FIL

CTL RE

(0805)

Coilcraft

(MLF package)

15nF

VCO_I

1:1/2

33uF

(pin_2)

Coilcraft

(pin_4)

(pin_22)

CPPS

DETECTOR AND CP

PHASE Frequency

VCO_TX_POWER

POWE

ENABL

1:1/

(0805)

Coilcraft

(0603 NPO)

QUAD

DETECTOR AND CP

PHASE Frequency

(pin_17)

DETECTOR AND CP

3 WIRE BU

CPPS

(0603)

PHASE Frequency

Coilcraft

VCO_RF

1:6/7

(0805)

4PF

C112

R120

C136

R117

VC_DCS

22PF

C150

VC_EGSM

C104

100NF

VCC_SYN

ANT100

VCC_CP

F102

856079

OUT

5.6K

R111

R110

15K

100PF

C123

L104

10nH

L107

5.6n

R124

OUT

VCC

2SC4617

TR100

VOL1861N27KRB

VCO100

2.7K

R101

C127

56PF

390PF

R123

220PF

C132

220P

C117

C118

NCP500SN25T1

U101

GND

ON/OFF

VIN

VOUT

C142

R121

4.7NF

C147

C141

22K

R114

VCC_RE

C140

10NF

VCC_RF_VCO

VCC_TX_BURST

OUT

BCR08PN

U102

B7820

F100

C113

6PF

C134

39P

C138

330PF

C125

C126

220PF

L101

15nH

100PF

R128

1.8K,1%

R112

560,1%

OUT1

OUT2

SW1

SW2

MQW291A897MR6

VCO101

C122

R108

300

10PF

33PF

C100

VCC_SYN

C101

R107

ANT101

ground

R116

ground

22PF

1.8K,1%

22PF

C144

C143

D101

HVC376B

390PF

C116

10PF

C152

10PF

C151

10K

L103

6.8nH

2.7K

R130

CTRL

GND

OUT

VCC

R102

C133

OSC100

TCO-9141

C137

100PF

R118

560

1UF

C139

100PF

C131

R109

300

10NF

C148

100PF

C146

C145

47PF

VCC_RX_TX

PAM_VCC

33PF

C106

VC_DCS

VCC_RX_TX

VCC_RE

33PF

C121

C128

3.3NF

C105

18P

1NF

C108

33nH

L105

R100 12

330

R127

C111

VCC_SYN

33K

R125

SYNON

SYNVC

TSTO

TXCPGND

TXCPO

TXCPVC

TXON

TXRFI

RFGND3

RFLOGND

RFLOI

RFLOVC

RFVC

RXON

SYNGND

NC1

NC2

RFCPO

RFCPVC

RFFIN

RFGND1

IFCPO

IFCPVC

IFGND2

IFTUNE

IFVC

IFVCC2

EXTRE

GND

GND42

GND

GND44

GSMI

U100

OM5178HN

CLK

DATA

DCSPCSI

430

ground

R104

C102

R105

2.7K

10K

10NF

R131

C120

220PF

C119

R113

470

3.9nH

L106

C114

12PF

C103

VCC_RX_TX

12nH

L108

10NF

C149

1UF

U103

BCR08PN

VCC_REF

C109

4
5
6

OUT

MBO-145

RFS100

GND

VCC

TC7SH32FU(TE85L)

U411

10K

R119

VC_EGSM

C107

18P

VCC_RX_TX

47NF

C129

C135

100PF

R122

27K

C115

0.5PF

15K

430

R115

12nH

L100

R103

R126

33K

100PF

C130

10nH

L102

100PF

ground

2.7K

C124

VC1

VC2

R106

DCS_RX

DCS_TX

EGSM_RX

EGSM_TX

LMG002S-5047A

F101

ANT

C110

6PF

VRAMP

VREG

R129

GSM850/900I

GSM850/900OUT

PCSOUT

TXEN

VBAT

VCC

VCC2

PAM100

RF3140

BAND

DCSI

GND

DCS_MODE_SW

EGSM_MODE_SW

RAM

EGSM

VBAT

PAM_VCC

DCS_MODE_SW

EGSM_MODE_SW

DCS_MODE_SW

DCS

AFC

MEL_13M

REF_ON

PON_RX

PON_TX

pin_12_IFVCC2

pin_23_SYNVCC

VCCCP

D_REF_13M

PON_SYNT

VCC_I

RF_BBI_CLK

RF_BBI_DAT

RF_EN_SYNT

IRX_TX_P

IRX_TX_N

QRX_TX_P

QRX_TX_N

Transmitter

Summary of Contents for SGH-E700

Page 1: ... SERVICE Manual GSM TELEPHONE CONTENTS 1 Specification 2 Circuit Description 3 Exploded Views and Parts List 4 Electrical Parts List 5 Block Diagrams 6 PCB Diagrams 7 Flow Chart of Troubleshooting GSM TELEPHONE ...

Page 2: ...nics Co Ltd June 2003 Printed in Korea Code No GH68 04050A BASIC ⓒ This Service Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law ...

Page 3: ...805 1880 ARFCN range 1 124 0 124 975 1023 512 885 Tx Rx spacing 45MHz 45MHz 95MHz Mod Bit rate Bit Period 270 833kbps 3 692us 270 833kbps 3 692us 270 833kbps 3 692us Time Slot Period Frame Period 576 9us 4 615ms 576 9us 4 615ms 576 9us 4 615ms Modulation 0 3GMSK 0 3GMSK 0 3GMSK MS Power 33dBm 13dBm 33dBm 5dBm 30dBm 0dBm Power Class 5pcl 15pcl 5pcl 19pcl 0pcl 15pcl Sensitivity 102dBm 102dBm 100dBm ...

Page 4: ...6 31 2 dBm 7 29 2 dBm 8 27 2 dBm 9 25 2 dBm 10 23 2 dBm 11 21 2 dBm 12 19 2 dBm 13 17 2 dBm 14 15 2 dBm 15 13 2 dBm 16 11 3 dBm 17 9 3dBm 18 7 3 dBm 19 5 3 dBm TX Power control level DCS1800 0 30 3 dBm 1 28 3 dBm 2 26 3 dBm 3 24 3 dBm 4 22 3 dBm 5 20 3 dBm 6 18 3 dBm 7 16 3 dBm 8 14 3 dBm 9 12 4 dBm 10 10 4 dBm 11 8 4dBm 12 6 4 dBm 13 4 4 dBm 14 2 5 dBm 15 0 5 dBm 2 GSM TX power class ...

Page 5: ... IQ demodulator and Tx modulator are controlled by serial data to select channel and use fast lock mode for GPRS high class operation 5 OM5178 U100 This chip integrates two differential input LNAs The GSM input supports the E GSM DCS input supports the DCS1800 The LNA inputs are matched to the 200 ohm differential output SAW filters through eternal LC matching network Image reject mixer downconver...

Page 6: ...d talk times Supervisory functions including a reset generator an input voltage monitor and a temperature sensor support reliable system design These functions work together to ensure proper system behavior during start up or in the event of a fault condition low microprocessor voltage insufficient battery energy or excessive die temperature 1 2 Backlight Brightness Modulator The Backlight Brightn...

Page 7: ...r closed to the OM6357 This uses the hall effect IC A3210ELH A magnet under main LCD enables A3210ELH 2 5 EMI ESD Filter This system uses the EMI ESD filter EMIF09 to protect noise from IF CONNECTOR part 2 6 IF connetor It is 18 pin connector They are designed to use VBAT V_EXT_CHARGE TXD0 RXD0 RTS0 CTS0 JIG_REC CHARGER_OK RXD1 TXD1 AUX_MIC AUX_SPK and GND They connected to power supply IC micropr...

Page 8: ...nd 32M bits UtRAM It has 16 bit data line HD 0 15 which is connected to OM6357 and MV317S It has 23 bit address lines HA 1 23 CS_NAND and NCSRAM signals is chip select Wrting process HWR_N is low and it enables writing process to flash memory and SRAM During reading process HRD_N is low and it enables reading process to flash memory and SRAM Each chip select signals in the OM6357 select memory amo...

Page 9: ...burden In hence Tiger will allow the user to be able to display to LCD direct without burdening the main processor It also allows to have various kinds of display size on the LCD and snapshot for Jpeg Digital effect will also be executed on real time base resulting Tiger as being a video co processor in the mobile platform Also an i80 type processor s 16bit parallel interface of Tiger makes it ava...

Page 10: ...change without notice 3 SGH E700 Exploded View and its Parts list This Document can not be used without Samsung s authorization 3 1 1 Cellular phone Exploded View 1 2 3 4 5 10 11 12 8 9 13 14 15 17 18 20 22 23 24 25 27 19 16 7 6 21 26 ...

Page 11: ...3A 7 CAMERA GH59 00900A 8 FOLDER LOWER GH75 02917A 9 WINDOW LCD GH75 02919A 10 SCREW 6001 001811 11 SCREW CAP R GH73 01890A 12 SCREW CAP L GH73 01891A 13 FRONT COVER GH75 02912A 14 KEYPAD GH75 03646A 15 MAIN PBA GH92 01568A 16 DOME SHEET GH59 00901A 17 VOLKEY FPCB GH59 00902A 18 CONNECTOR COVER GH73 01394A 19 MIC GH30 00045A 20 INTENNA GH42 00315A 21 SCREW 6001 001812 22 RF COVER GH73 01894A 23 CA...

Page 12: ... Exploded view and its Part list This Document can not be used without Samsung s authorization 3 3 3 Test Jig GH80 01909A 3 1 RF Test Cable GH39 00172A 3 2 Test Cable GH39 00217A 3 3 Serial Cable 3 4 Power Supply Cable 3 5 DATA CABLE GH39 00219A 3 6 TA GH44 00482A ...

Page 13: ...647 LED607 0601 001819 LED604 0601 001819 LED606 0601 001819 LED609 0601 001819 LED610 0604 001261 IRD600 0801 002237 U300 0801 002529 U411 0801 002882 U305 0801 002882 U202 0801 002882 U201 SEC CODE Design LOC 1001 001253 U602 1009 001010 U600 1109 001280 UME300 1201 001954 PAM100 1202 001036 U604 1203 002076 U304 1203 002824 U101 1203 002980 U501 1204 001960 U301 1205 002264 U100 1205 002276 UCP...

Page 14: ...2 R308 2007 000162 R310 2007 000162 R311 2007 000162 R313 2007 000162 R317 2007 000162 R318 2007 000162 R500 2007 000162 R501 2007 000162 R502 2007 000162 R503 2007 000162 R601 SEC CODE Design LOC 2007 000162 R602 2007 000162 R620 2007 000162 R200 2007 000171 R304 2007 000171 R403 2007 000171 R404 2007 000171 R604 2007 000171 R606 2007 000171 R124 2007 000172 R203 2007 000172 R202 2007 000242 R607...

Page 15: ...1 R204 2007 007008 R109 2007 007008 R108 2007 007009 R123 2007 007014 R302 2007 007014 R300 2007 007100 R401 2007 007100 R314 2007 007156 R506 2007 007334 R624 2007 007334 R508 SEC CODE Design LOC 2007 007480 R625 2007 007573 R505 2007 007588 R116 2007 007588 R128 2007 007588 R507 2007 007981 R623 2007 008312 R622 2203 000233 C123 2203 000233 C124 2203 000233 C125 2203 000233 C130 2203 000233 C131...

Page 16: ...5 C117 2203 000628 C136 2203 000628 C143 2203 000628 C144 2203 000679 C301 2203 000812 C100 2203 000812 C106 2203 000812 C121 2203 000812 C203 2203 000812 C208 2203 000812 C626 SEC CODE Design LOC 2203 000812 C702 2203 000812 C703 2203 000812 C704 2203 000812 C705 2203 000812 C706 2203 000812 C707 2203 000812 C708 2203 000812 C709 2203 000812 C710 2203 000812 C711 2203 000812 C712 2203 000812 C713...

Page 17: ...1 C214 2203 005061 C215 2203 005061 C216 2203 005061 C217 2203 005061 C218 2203 005061 C219 2203 005061 C303 2203 005061 C304 2203 005061 C307 2203 005061 C313 2203 005061 C400 SEC CODE Design LOC 2203 005061 C401 2203 005061 C403 2203 005061 C500 2203 005061 C605 2203 005061 C606 2203 005061 C611 2203 005061 C204 2203 005061 C205 2203 005061 C150 2203 005065 C422 2203 005065 C111 2203 005065 C139...

Page 18: ...C427 2404 001151 C141 2404 001151 C142 2703 001709 L108 2703 002198 L107 2703 002199 L100 2703 002201 L105 2703 002205 L106 2703 002370 L102 2703 002519 L101 2703 002586 L104 2703 002597 L702 2703 002597 L701 2703 002597 L700 2703 002608 L103 2801 004025 OSC400 2801 004285 OSC300 2806 001305 VCO100 2806 001310 VCO101 SEC CODE Design LOC 2809 001271 OSC100 2901 001246 U500 2904 001417 F100 2904 001...

Page 19: ...E QUADBAND PAM RF3140 10X10 GSM Pout 36 0 dBm Eff 45 DCS Pout 34 5 dBm Eff 40 Discrete 3rd Order Loop Filter IFVCO PFD PMU VDD1 1 35V min 2 95Vmax 150mA VBAT 3 6V typ 3 0V min RF1_VDD RF2_VDD RF1_VDDS RF2_VDDS HVS VDD2 1 35V min 3 45V max 150mA VDD3 1 35V min 3 45V max 100mA VDD4 1 35V min 3 45V max 150mA AVDD 1 35V min 2 65V max 100mA VCC_RX_TX 2 7V 100mA VCC_SYN 2 7V 100mA VCC_RF_VCO 2 7V 100mA ...

Page 20: ...it Li Ion Battery Slim Standard OM6357 VIBRATOR SYSTEM CLOCK 13MHz RTC_CLOCK 32 768KHz KEY_BOARD RECEIVER MIC LCD RF INTERFACE VCC_RX_TX VCC_RF_VCO VCC_TX_BURST PMU VCC_SYN Serial Data Interface I O Interface A D Interface BB INTERFACE MELODY IC 40 Poly SPEAKER FLASH 256M bit VDD1 VDD2 VDD3 VDD_VIB MIC_BIAS VCC_CP VDD_KEY VDD_AMP AVDD AVDD_TEMP SIM CARD SRAM 32M bit MV317S 2 Base Band Solution Blo...

Page 21: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization 6 SGH E700 PCB Diagrams 6 1 1 Main PCB Top Diagram ...

Page 22: ...SAMSUNG Proprietary Contents may change without notice This Document can not be used without Samsung s authorization 6 SGH E700 PCB Diagrams 6 2 2 Main PCB Bottom Diagram ...

Page 23: ...re than 3 4V Power On does not work Change the Battery END No Yes C414 V_ISUP 2 7V Check the PMU related to V_ISUP No Yes Check the Clock at R401 32KHZ Resolder OSC400 No Yes C431 VDD1 H Check the VDD1 circuit No Yes C430 VDD2 C429 VDD3 2 8V Check the VDD2 VDD3 circuit No Yes Check for the clock at C133 13MHz Check the clock generation circuit related to OSC101 No Yes Check the initial operation Y...

Page 24: ... VSS10 G7G8 VSS11 VSS12 A2 B8 SIMIO SIMSCN A1 SIMSC P B1 SIMVBAT B2 SLPMOD D10 TM H5 J5 VBACK G9 C1 RST D9 RSTO SCL E3 SD A F2 SEL12RB E9 SEL3RB H4 SIMCLK C6 SIMGND F10 E8 RF1SW S RF1VDD G10 RF1VDD S F9 RF2SNS H9 RF2SW S E10 RF2VDD H10 RF2VDD S J10 RFVBAT ONKEY K8 OSC32I K9 OSC32O REC1 K1 REC2 J2 REC3 K2 REFC H8 REFGND K6 RF1SNS D8 C10 IN T IO D2 ISUPA H6 ISUPD J4 MICBIAS J6 NC 1 NC 2 H3 HFAVBA T ...

Page 25: ...Troubleshooting This Document can not be used without Samsung s authorization 7 3 2 Initial R200 RSTON H Initial Failure Check the circuit related to reset END No Yes Is U305 pin 4 6 memory CE OK Yes Yes No Check the U305 Check the circuit around LCD U305 Short or not solder Yes ...

Page 26: ...3 HA4 N3 K5 HA5 HA6 M3 P2 HA13 HA14 J2 J5 HA15 HA16 K3 J4 HA17 HA18 K4 K2 HA19 HA2 P3 P6 N8 GPIO 9 GPON 1 L10 GPON 2 N9 M4 HA1 HA10 N1 L2 HA11 HA12 L1 M2 GPIO 1 K9 GPIO10 K8 GPIO 2 L8 GPIO 3 M9 GPIO 4 P7 L7 GPIO 5 GPIO 6 L9 N7 GPIO 7 GPIO 8 N4 CS_N 0 CS_N 1 G5 M5 CS_N 2 CS_N 3 G3 B5 CTS0_N A11 EARN EARP B10 M12 GPIO 0 BU Z CCLK E10 CD I D8 E9 CD O D9 CEN CKI P11 P13 CKI32I CKI32O P14 AUXSP A10 G10...

Page 27: ...ut Samsung s authorization 7 5 3 Charging Part Check the U501 pin 4 4 9V Abnormal charging part END No Yes U501 pin 5 H No Yes TR500 pin 1 CHG_ON L No Yes Check the U501 pin 3 4 2V No Yes Check the the circuit related to V_EXT_CHARGE Resolder or replace U501 Check the circuit related to CHG_ON signal Resolder or replace U501 Yes ...

Page 28: ...hart of Troubleshooting 7 6 Charging END_OF_CHARGE MES_BATT CHG_O N CHARGER_O K U501 LTC4054XES5 4 2 3 BAT GND 2 5 PRO G VCC 4 _CHRG1 V_EXT_CHARGE 3 D2 2 TR501 FDG6301N D1 6 R507 VDD2 R510 C502 1UF 10V G1 5 G2 S1 1 4 S2 R506 1 2K 1 8K 1 270K R511 180K TR500 BCR133T 1 3 2 330K 1 180K 270K R509 C501 NC R512 R504 VBAT R508 200K 1 R505 ...

Page 29: ...be used without Samsung s authorization 7 7 4 Sim Part SIM400 pin 1 5 H Phone can t access SIM Card Check the sim charge pump Check the SIM Card END No Yes Yes Yes No Check the 32k OSC After Power ON Check SIMCLK Signal on SIM400 pin3 in a few second Yes No Replace PBA After SIM card insert SIM400 pin 2 H SIM_RST Yes ...

Page 30: ...Samsung s authorization SGH E700 Flow Chart of Troubleshooting 7 8 5 Microphone Part Check the connection from MIC Check the circuit from UCP200 to MIC Resolder MIC Resolder the R604 R606 R603 R607 C606 and C611 END No Yes Yes Yes Yes No Check the MIC No Replace the MIC Microphone does not work ...

Page 31: ...can not be used without Samsung s authorization 7 9 Close to MCP Close to microphone MICROPHONE R607 10K 1 5K MIC_N MIC_P 5PF 1 8PF VR600 C601 10PF 12PF 10PF C612 MIC MIC600 1 2 C600 C606 MIC_BIAS C611 100NF 1 5K 47PF C607 R605 C613 5PF C602 100NF 0 R604 C609 C608 10PF C614 12PF 0 R606 R603 NC C610 Microphone ...

Page 32: ...lody U300 pin 5 2 85V Speaker does not work Check the Clock signal at Pin 1 of U301 13MHz Check the clock generation circuit related to OSC100 and U300 END No Yes No Resolder or replace U300 U301 pin 17 18 1 8V When U301 operate Resolder U301 Yes No HDC700 pin 40 42 1 8V Check the circuit related to SPK_P SPK_N signal Yes No Is Speaker working No Yes Change the Speaker Yes Yes ...

Page 33: ...K M_LED TC7SH04FU TE85L 100NF C307 HA 1 MELODY_C S AMP_N 1 2K 2 2K R307 330 R301 1NF VDD2 51K R302 10V 1UF C306 C300 100PF 1 2NF 100NF C303 U300 GND 3 IN 2 NC 1 OUT 4 VCC 5 3 3K R303 R306 220NF SPOUT 1 SPOUT 2 18 15 SPVDD SPVSS 16 7 VDD 9 VREF 8 VS S CS 29 3 HPOUT L MONO 10 11 HPOUT R IOVDD 32 LED 2 19 MTR 5 NC PLLC 6 17 D2 D3 24 23 D4 D5 22 21 D6 D7 20 EQ 1 12 13 EQ 2 EQ 3 14 YMU762 MA 3 U301 30 ...

Page 34: ...without Samsung s authorization SGH E700 Flow Chart of Troubleshooting 7 12 7 Key Data Input When one of the keys is pushed is it displayed on LCD Check the Dome sheet Key Pad END No Yes Yes Check Initial Operation When one of the keys is pushed KBIO signal is OK Replace the PBA No Yes ...

Page 35: ... 4 1 5V Resolder or replace U602 END No Yes Yes Receiver does not work HDC700 pin 40 42 1 5V Replace the HDC700 No Yes Is Receiver working Replace the Receiver No Yes No Resolder or replace U602 Yes No Resolder EAR600 EAR600 pin 2 3 short Yes EAR600 pin 2 3 6 1 5V No Resolder EAR600 Yes Check the soldering of the spaeaker wire No Modufy the speaker wire soldering Yes U602 pin 12 15 1 5V ...

Page 36: ...ion SGH E700 Flow Chart of Troubleshooting 7 14 9 Back Light for Color Main LCD Is LCD Contrast set on high level in the Menu Set LCD Contrast on high level END No Yes Yes Backlight does not work HDC700 pin 24 2 8V Check the R309 C316 No Yes HDC700 pin 19 L_WR is OK Check the U302 No Yes Yes Replace the LCD Module ...

Page 37: ...GH E700 Flow Chart of Troubleshooting This Document can not be used without Samsung s authorization 7 15 10 Key Back Light U601 pin 5 H Check the PMU related to VDD_KEY END No Yes Yes Key Backlight does not work U601 pin 2 3 H No Resolder or replace U601 Yes ...

Page 38: ...oubleshooting 7 16 11 Camera part Camera function does not work Yes No Connect the camera module Check the Camera connector on LCD module Yes HDC700 pin 48 50 2 8V No Check LCD and HDC700 Yes OSC300 Pin 3 27MHz No Check OSC300 and R314 Yes HDC700 pin 24 2 8V Yes No Check the R309 C316 Is there another problem END Replace the camera module Yes ...

Page 39: ...RF input CH center freq 67 7kHz Amp 50dBm Check F101 pin11 L pin2 L F101 pin10 65dBm F100 pin1 70dBm U100 pin5 6 7 8 1V U100 pin33 70dBm pin34 70dBm Check ANT Switch control circuit Resoder F101 Resolder F100 C106 L102 Resolder L101 C105 C107 Check U100 pin26 RF freq 2 100kHz 30dBm Check Resolder U100 C121 R110 RF13MHz RF PSU Part Resolder U100 R101 R102 R105 R106 1V Yes Yes Yes Yes Yes Yes Yes Ye...

Page 40: ... PAM100 pin9 20dBm VCO101 pin1 8dBm PAM100 pin7 11dBm Change or Resolder F101 Check ANT Switch control circuit Resolder L105 C114 Resolder R107 R108 R109 U100 pin5 6 7 8 500mV Yes Check PAM100 VBATT pin4 7 OK Resolder or Change PAM100 Check VBATT or PAM control signal Check U100 pin 26 20dB pin11 2V OK Check Resolder RFLO signal RF13MHz RF PSU Part No No No No No No No No Yes Yes Yes Yes Yes Yes Y...

Page 41: ...input CH center freq 67 7kHz Amp 50dBm Check F101 pin11 L pin2 L F101 pin1 65dBm F102 pin1 70dBm U100 pin5 6 7 8 1V U100 pin35 70dBm pin36 70dBm Check ANT Switch control circuit Resoder F101 Resolder F102 C112 L104 Resolder L103 C110 C113 Check U100 pin26 RF freq 2 100kHz 30dBm Check Resolder U100 C121 R110 RF13MHz RF PSU Part Resolder U100 R101 R102 R105 R106 1V Yes Yes Yes Yes Yes Yes Yes Yes No...

Page 42: ... PAM100 pin11 13dBm VCO101 pin5 12dBm PAM100 pin1 15dBm Change or Resolder F101 Check ANT Switch control circuit Resolder L106 C115 Resolder R100 R103 R104 U101 pin5 6 7 8 500mV Yes Check PAM100 VBATT pin4 7 OK Resolder or Change PAM100 Check VBATT or PAM control signal Check U100 pin 26 20dB pin11 2V heck Resolder RFLO signal RF13MHz RF PSU Part No No No No No No No No Yes Yes Yes Yes Yes Yes Yes...

Page 43: ... OSC100 TCO 9141 C137 100PF R118 560 1UF C139 100PF C131 R109 300 10NF C148 100PF C146 C145 47PF VCC_RX_TX PAM_VCC 33PF C106 VC_DCS VCC_RX_TX VCC_RE F 33PF C121 C128 3 3NF C105 18P F 1NF C108 33nH L105 R100 12 330 1U F R127 C111 VCC_SYN 33K R125 21 SYNON 23 SYNVC C 3 TSTO 40 TXCPGND 1 TXCPO 2 TXCPVC C 10 TXON 38 TXRFI 37 RFGND3 25 RFLOGND 26 RFLOI A 27 RFLOI B 28 RFLOVC C 31 RFVC C 9 RXON 24 SYNGN...

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