CONFIDENTIALSERVICING CONCERNSCHAPTER 1. GENERAL DESCRIPTION[1] Specifications ................................................. 1-1[2] Names of parts ............................................... 1-3[3] List of Menu Functions ................................... 1-5[4] Optional Accessories ..................................... 1-5CHAPTER 2. ADJUSTMENTS,PERFORMANCE CHECK, ANDFIRMWARE UPGRADE[1] SHARP Programme Support Tool (SPST)........ 2-1[2] Test points .................................................... 2-18[3] Troubleshooting............................................ 2-25CHAPTER 3. DISASSEMBLY AND REASSEMBLY[1] Servicing Concerns ........................................ 3-1[2] Disassembly and reassembly ........................ 3-3[3] Precautions for installing the thin coaxial........ 3-6CHAPTER 4. DIAGRAMS[1] Block diagram ................................................4-1CHAPTER 5. SCHEMATIC DIAGRAM ANDWIRING SIDE OF P.W.BOARD[1] Notes on schematic diagram .........................5-1[2] Types of transistor and LED ..........................5-1[3] Waveforms of circuit ......................................5-2[4] Schematic diagram/Wiring side of P.W.Board .............................5-7CHAPTER 6. OTHERS[1] Function table of IC........................................6-1[2] Function table of Display .............................6-33Parts GuideINTERNALMODELNAMESELEC-TIONCODEDESTINATION INTERNALMODELNAMESELEC-TIONCODEDESTINATIONJNJ300BW B Hungary JNJ300KW K AustriaJNJ300CW C Switzerland JNJ300PW P PortugalJNJ300DW D Greece JNJ301PW PP Portugal (Prepaid)JNJ300EW E U.K. JNJ300RW R IrelandJNJ301EW EP U.K. (Prepaid) JNJ300SW S SpainJNJ300FW F France JNJ300TW T ItalyJNJ300GW G Germany JNJ300UW U BelgiumJNJ301GW GP Germany (Prepaid) JNJ300WW W SwedenJNJ300HW H Netherlands JNJ300ZW Z New ZealandSERVICE MANUAL902SHNo. S0422JNJ300/W3G(UMTS)/GSM/GPRS PHONE902SHMODELSHARP CORPORATIONCONTENTSParts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones formaintaining the safety and performance of the set.This document has been published to be usedfor after sales service only.The contents are subject to change without notice.• In the interests of user-safety the set should be restored to itsoriginal condition and only parts identical to those specifiedshould be used.• CautionRisk of explosion if battery is replaced by an incorrect type,dispose of used batteries according to the instruction.