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Panasonic KX-TCA275CE, Руководство по обслуживанию

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41

     KX-TCA275CE

11 Measurements and Adjustments

11.1. Check Procedure (Handset)

11.1.1. Preparation

11.1.1.1. Equipment Required

• DECT tester: Rhode & Scorers, CMD 60 is recommended.
• Frequency counter: it must be precise to be able to measure 1Hz (precision; ±4ppm).

Hewlett Packard, 53131A is recommended.

• DC power: it must be able to output at least 1A current under 3.8V for Handset, 9V for Tool.
• Digital multi-meter (DMM): it must be able to measure voltage and current.
• Oscilloscope

11.1.1.2. Tool and PC

• EEPROM serial Tool

Tool: PSZZ2CA155EU

• PC which has “flash program.exe”.

11.1.2. PC Setting

11.1.2.1. Connections

Содержание KX-TCA275CE

Страница 1: ... Panasonic Communications Co Ltd 2009 Unauthorized copying and distribution is a violation of law ORDER NO KMS0909722CE DECT Portable Station Model No KX TCA275CE for Europe ...

Страница 2: ...andset 35 8 5 Ringer Trouble Handset 35 8 6 No Voice Transmission 36 8 7 No Voice Reception 37 8 7 1 Talk Mode 37 8 7 2 Speakerphone Mode 38 8 8 Password Trouble 38 8 8 1 User Password is forgotten 38 8 8 2 System Lock Password is forgotten 38 9 Service Fixture Tools 39 10 Disassembly and Assembly Instructions 40 10 1 Handset 40 10 2 Charger Unit 40 11 Measurements and Adjustments 41 11 1 Check Pr...

Страница 3: ...3 KX TCA275CE 16 3 4 Handset Board Parts 69 16 3 5 Charger unit Board Parts 71 16 3 6 Fixtures and Tools 71 ...

Страница 4: ...s which is made from Tin Sn Silver Ag and Copper Cu This model and others like it manufactured using lead free solder will have PbF stamped on the PCB For service and repair work we suggest using the same type of solder Caution PbF solder has a melting point that is 50 70 F 30 40 C higher than Pb solder Please use a soldering iron with tempera ture control and adjust it to 700 20 F 370 10 C Exerci...

Страница 5: ...losion if battery is incorrectly replaced 2 Replace only with the same or equivalent type recommended by the manufacturer 3 Dispose of used batteries according to the manufacture s Instructions 2 3 Discarding of P C Board When discarding P C Board delete all personal information such as telephone directory and caller list or scrap P C Board ...

Страница 6: ...ultiple Access Battery Life Handset if batteries are fully charged Stand by Up to 200 hours Ni MH Talk Up to 15 hours Ni MH Channel Spacing 1728kHz Bit rate Spacing 1152kbit s Operating Conditions 5 40 C 20 80 relative air humidity dry Modulation GFSK Gaussian Frequency Shift Keying RF Transmission Power approx 250mW Voice Coding ADPCM 32 kbit s Operation Range Up to 300 m outdoors Up to 50 m indo...

Страница 7: ...3 0V 3 0V 3 0V Flash 32Mbit SRAM 2Mbit Color LCD ACS1 ACS2 16 CR16C 3 0V Peripheral Backlit 5 0V PWM BBIC SC14428F Power Management Batt Keys Xtal 10 368MH UART JTAG Charger Circuit Charge Current Charge on off Battery 3 6V Batt Regulator RF 3 0V 5 0V Regulator 3 0V 1 8V Batt 3 0V Batt Tr Batt Vib 3 0V LED G LED R LED YG Tr Tr Tr Charge LED Key backlit OP Amp H S J a c k Mic Bias Rear Speaker Rece...

Страница 8: ...LIFIER IC IC5 Single OP_AMP for SPEAKER RF Module PLL Oscillator Detector Compress Expander Amplifier for reception Amplifier for transmission 4 2 2 Power Supply Circuit Reset Circuit When power on the Handset the voltage is as follows BATTERY 3 5 V to 4 2V Battery Q8 1 8V Q10 3 0V The reset signal is generated with IC3 and Q17 Power for RF IC IC601 is generated with IC603 5 0V for LCD back light ...

Страница 9: ... Battery GND R5 CHG Handset CHG Charger GND 4 2 4 Battery Low Power Down Detector Battery Low and Power Down are detected by BBIC IC3 which checks the battery voltage The detected voltage is as follows Battery Low Battery voltage V Batt 3 5V 50mV The BBIC detects this level and starts flashing Power Down Battery voltage V Batt 3 3V 50mV The BBIC detects this level and power down IC3 97pin Q4 Q3 Q2...

Страница 10: ... Module The stabilized supply voltage is fed to the microphone from pin 119 VREF of IC3 To reduce consumption current this voltage is supplied only while calling or receiving Headset When a headset is inserted a signal from microphone is cut off and an audio signal from a headset is input to pin 118 MIC Headset detection When a headset is inserted pin 41 ADC2 of IC3 goes from Low to High around 1V...

Страница 11: ...11 KX TCA275CE LCD Circuit The LCD is controlled by 5 control signal READ WRT A0 LCD_CS LCD_RST and Data bus LCD back light is controlled by IC3 79pin and this PWM signal controls back light brightness ...

Страница 12: ...rom pin 110 LSR and pin 111 LSR to the receiver Headset When the headset is inserted a signal to the receiver is cut off and audio signal from pin 110 LSR of IC3 is input to the head set Speakerphone In Speakerphone mode the BBIC IC3 makes pin 1 of IC5 from Low to High And an audio signal from pin 112 LSR_HS of IC3 is sent to a monitor speaker through speaker Amplifier IC IC5 ...

Страница 13: ...ick Sound Circuit When the key is pushed a signal is sent from pin 12 of IC3 to a monitor speaker through speaker Amplifier IC IC5 At this time BBIC IC3 makes pin 1 of IC5 from low to high Type of LED LED ON LED OFF Call Charge Indicator LED Green D1 IC3 81pin High Q6 ON IC3 81pin Low Q6 OFF Call Charge Indicator LED Red D1 IC3 80pin High Q7 ON IC3 80pin Low Q7 OFF Key back light LEDs Yellow D3 D1...

Страница 14: ...14 KX TCA275CE 4 2 9 Vibrator Circuit BBIC IC3 controls Vibrator Pin 83 VIB of IC3 goes high and Vibrator turns ON ...

Страница 15: ...15 KX TCA275CE 5 Location of Controls and Components 5 1 Handset ...

Страница 16: ...16 KX TCA275CE ...

Страница 17: ...ncluded Panasonic AC adaptor PQLV219CE 6 2 Battery 6 2 1 Battery Installation Insert the batteries and close the cover as indicated below 6 2 2 Charging the Battery At the time of shipment the battery is not charged Please charge the battery for about 5 5 hours before using the handset for the first time When the battery has been completely charged the charge indicator will change from red to gree...

Страница 18: ...ry has been fully charged the battery should be replaced Before replacing the battery make sure the low battery warning is displayed then turn off the power to prevent memory loss Replace the battery and charge the new battery for about 5 5 hours If you replace the battery before the low battery warnings appears the battery strength icon may display an incorrect reading In this case use the handse...

Страница 19: ...19 KX TCA275CE 7 Operating Instructions 7 1 Soft Keys ...

Страница 20: ...20 KX TCA275CE ...

Страница 21: ...21 KX TCA275CE 7 2 Handset Setting Menu Layout ...

Страница 22: ...andby mode If you select Manual Password or Auto Password for Key lock type you need to enter the password for unlocking If no password has been set you cannot select Manual Password or Auto Password for Key lock type 7 4 Selecting the Display Language You can select the language displayed on your handset ...

Страница 23: ...23 KX TCA275CE 7 5 DISPLAY ...

Страница 24: ...24 KX TCA275CE 7 6 Function Menus Press the Navigator Key to display the main and sub menus 7 6 1 Main Menu While in Standby Mode 7 6 2 Sub Menu While Off hook During a Conversation ...

Страница 25: ...25 KX TCA275CE 7 7 Function Keys ...

Страница 26: ...26 KX TCA275CE 7 8 Flexible Keys ...

Страница 27: ...27 KX TCA275CE 7 9 Caller ID ...

Страница 28: ...28 KX TCA275CE 7 10 Character Mode Table ...

Страница 29: ...29 KX TCA275CE 8 Troubleshooting Guide Note When you find the suspected parts check the soldering and resolder or replace the parts if it is necessary ...

Страница 30: ...30 KX TCA275CE 8 1 Power Trouble Handset 8 1 1 Power Does Not Go On The symptom is No Lite LED OFF No Display No Sound ...

Страница 31: ...31 KX TCA275CE Charger Unit NO Display On the LCD ...

Страница 32: ...32 KX TCA275CE 5V Circuit 8 2 Battery Charge Trouble Handset 8 2 1 Charge On ...

Страница 33: ...33 KX TCA275CE 8 2 2 Charge Off ...

Страница 34: ...34 KX TCA275CE 8 3 LED Trouble Handset 8 3 1 Key Back Light 8 3 2 Charging And Ringing LED ...

Страница 35: ...75CE 8 4 Vibrator Trouble Handset 8 5 Ringer Trouble Handset Check ringer volume setting and meeting mode setting at first Key Click Sound Troubleshooting is same method Check Keyfone setting of handset at first ...

Страница 36: ...36 KX TCA275CE 8 6 No Voice Transmission ...

Страница 37: ...37 KX TCA275CE 8 7 No Voice Reception 8 7 1 Talk Mode ...

Страница 38: ...CA275CE 8 7 2 Speakerphone Mode 8 8 Password Trouble 8 8 1 User Password is forgotten Test command PWC set user password to 1234 8 8 2 System Lock Password is forgotten Test command SLC unlock the system lock ...

Страница 39: ...39 KX TCA275CE 9 Service Fixture Tools ...

Страница 40: ...uctions 10 1 Handset 10 2 Charger Unit Shown in Fig To Remove Remove 1 Rear Cabinet Screws 2 8 A 4 2 Follow the procedure 3 Main P C Board Main P C Board Shown in Fig To Remove Remove 4 Lower Cabinet Screws 2 6 12 B 2 5 Main P C Board Main P C Board ...

Страница 41: ...ust be precise to be able to measure 1Hz precision 4ppm Hewlett Packard 53131A is recommended DC power it must be able to output at least 1A current under 3 8V for Handset 9V for Tool Digital multi meter DMM it must be able to measure voltage and current Oscilloscope 11 1 1 2 Tool and PC EEPROM serial Tool Tool PSZZ2CA155EU PC which has flash program exe 11 1 2 PC Setting 11 1 2 1 Connections ...

Страница 42: ...oad Manual 11 1 3 1 Step 1 Before Downloading Configuration Setting 1 1 Execute Flash Program exe 11 1 3 2 1 2 Press Config 1 3 Press OK Selected item will be stored Connect the download PC cable with selected come port COM1 COM9 ...

Страница 43: ...3 KX TCA275CE 11 1 3 3 Step 3 Select Download file 3 1 Download Program Main Menu Push Reference to select the download file Download Filename tca275vXXX hex XXX Version Select program All for erase type ...

Страница 44: ...6 This operation will not turn the power of target to on If target power turns on check following item Then try again from step 1 1 A Check serial PC cable connection PC with TCA275 B Check Configuration Refer to Step 1 2 C Check PC cable attachment of target 4 4 Click Download Communicating PC with Target Don t release the POWER key in this step If release the OFF key downloading will be failed ...

Страница 45: ...mmunication check OK If communication check become OK Display will show CRC OK If communication NG click cancel key then back to step 4 1 and try download again Erase the flash ROM You can release the POWER key in this step ...

Страница 46: ...46 KX TCA275CE 4 6 Downloading Start After several seconds Display shows Flash Program Start ...

Страница 47: ...ecute the command SLF and VER 2 Confirm the returned checksum value Connection of checksum value and software version is shown below IC3 X1 C17 IC1 IC2 D Charge Control Check Charge Current Monitor Confirmation 1 Apply 6V between CN3 and CN4 with current limit of PSU to 200mA 2 Confirm that the charge current is ON OFF 3 SW to decrease current limit of PSU to 100mA 4 Confirm that the charge curren...

Страница 48: ... up connection at CMD 60 4 Confirm that the B Field Modulation is 360kHz div 380kHz div using data type Fig 31 5 Adjust the B Field Modulation if required Execute the command SMR xx where xx is the value IC3 RF module J RSSI Level Confirmation Follow steps 1 to 3 of I above 4 Set DECT tester power to 93dBm 5 Execute the command RSS 6 Confirm that the returned value is 0x8 8 hex 7 Set DECT tester p...

Страница 49: ...691 C627 L608 C630 C633 C631 L606 C632 C648 L616 JP601 C673 C666 C670 L615 L631 L610 C653 C680L611 C652 L621 C665 L620 D601 L617 C660 C643 R645 C607 C675 D14 R53 C40 R21 R22 R4 R3 R25 R24 C72 C46 R58 R67 C42 R62 R71 R74 C122 R60 R54 R57 C55 C66 C30 C52 R61 C50 C43 C13 C15 R23 C18 R15 R13 C7 R10 L2 C6 IP101 D11 R14 L3 C17 R55 R35 D15 R65 R64 R59 R42 R66 C609 C622 C610 R607 R626 C608 R604 C634 L632 ...

Страница 50: ...W50 SW41 SW42 SW32 SW52 SW02 SW21 SW51 SW22 SW12 SW53 SW23 SW43 SW13 CN9 SW03 SW33 D23 R82 D24 D25 R83 R84 R85 D26 R81 D22 R80 D21 D20 R79 D19 R78 R77 D18 R76 D17 D10 R51 D9 R50 R49 D8 R48 D7 R45 D4 D6 R47 D3 R44 D5 R46 KX TCA275CE CIRCUIT BOARD HANDSET Bottom View AF VOLT METER OSCILLO SCOPE 32Ω ...

Страница 51: ...Replace Parts A Charging Check 1 Connect Charge Contact 30Ω 2W register between charge and charge 2 Measure and confirm voltage across the register is 5 1V 0 2V Item Value Refer to Remarks Modulation 360 kHz div 380 kHz div Adjustment Handset I Data type Fig31 RSSI Level 0x08 hex 8 hex at 93dBm 0x1D hex 8 hex at 63dBm Adjustment Handset J CN1 CK1 CK3 IP1 C1 R1 C2 C6 R8 C4 C5 C3 D1 R6 CK2 CK7 CK6 C...

Страница 52: ...l voltmeter and set the selector knob to ohm meter 2 Put the probes at the speaker terminals as shown below 11 5 How to Check the Handset Receiver 1 Prepare the digital voltmeter and set the selector knob to ohm meter 2 Put the probes at the receiver terminals as shown below ...

Страница 53: ...53 KX TCA275CE 11 6 Frequency Table MHz Channel No Transmit Receive Frequency 0 1897 344 1 1895 616 2 1893 888 3 1892 160 4 1890 432 5 1888 704 6 1886 976 7 1885 248 8 1883 520 9 1881 792 ...

Страница 54: ...he P C board when cutting the pins with a cutter 2 Make a few cuts into the joint between the IC and its pins first and then cut off the pins thoroughly 3 While the solder melts remove it together with the IC pins When you attach a new IC to the board remove all solder left on the land with some tools like a soldering wire If some solder is left at the joint on the board the new IC will not be att...

Страница 55: ...55 KX TCA275CE 12 2 Terminal Guide of the ICs Transistors and Diodes 12 2 1 Handset 12 2 2 Charger Unit ...

Страница 56: ... 103 103 LDO1_Sense 104 LDO1_CTRL 105 LDO2_CTRL 106 VBAT2 107 VBAT1 108 AVS2 109 AVD2 110 LSR REF 111 LSR REF 112 LSR_HS CIDIN 113 VREF_HS CIDOUT 114 MIC 115 VREF 116 VBUF 117 AGND 118 MIC 119 VREF CIDIN 120 RSTn 121 AD0 EXT_MEMORY 122 AD1 123 AD2 124 AD3 125 AD4 126 AD5 127 AD6 128 AD7 CN5 1 2 3 SW12 8 SW33 R SW41 Xfer CLR SW13 0 SW31 MSG SW52 2 SW11 SOFT_A SW53 7 SW22 9 SW02 5 SW21 1 SW03 SW42 3...

Страница 57: ...C56 10p C62 NC R67 0 C54 Z0 1 C65 10p CN1 HEADSET_JACK 1 2 3 4 5 RF_GND R66 NC AG R59 47k R64 47k R65 82k R60 56k D3 0V R57 100k C69 10p AG CN9 1 2 R70 33 R69 33 C58 10p C57 10p AG AG AG C39 10p AG R72 0 C68 10p R61 NC BATT C66 NC C51 NC C63 NC C50 NC IC6 NC 1 SUSPEND 2 BIAS IN 3 BIAS OUT 4 IN 5 OUT1 6 VCC 7 GND 8 OUT2 C45 NC R55 10k C47 NC C52 NC R68 NC C55 NC C59 NC C43 NC R54 NC R42 0 R71 NC R6...

Страница 58: ...603 2 7k FB606 F B C603 10p C656 1 5p RSSI C653 2p C683 10p R614 22k PSEL C607 0 01 C634 3p C609 0 01 C673 0 BATT C606 8p C642 10p BATT C650 8p R623 560 L610 3 3nH C649 10p C670 5 6nH C643 10p R612 1 2k C660 10p C645 1p IC601 1 NC1 2 DR 3 DRX 4 NC4 5 NC5 6 DIREF 7 VCCRXRF 8 GNDRXRF 9 RF 10 RFX 11 RXON 12 VCC1 13 BPNP 14 VCCPLL 15 VCCBG1 16 GNDREG1 17 TXDA 18 GNDPLL 19 RSSI 20 RXDSG 21 SYRI 22 SYCL...

Страница 59: ... 3 Charger Unit CN1 1 2 CK 1 CK 3 CK2 C K6 C K7 IP1 D1 CHRG CHRG Q2 NC S D G C6 1500p Q1 NC C5 NC C4 NC R3 22 R4 22 R5 22 R2 22 CK5 CK4 C3 NC C2 NC C1 NC R8 0 R7 NC R6 NC R1 NC KX TCA275CE CHARGER UNIT SCHEMATIC DIAGRAM ...

Страница 60: ...611 C625 L601 FB606 R615 C54 C56 C647 FB603 C626 C691 C627 L608 C630C633 C631L606 C632 C648 L616 JP601 C673 C666 C670 L615 L631 L610 C653 C680L611 C652 L621 C665 L620 D601 L617 C660 C643 R645 C607 C675 D14 R53 C40 R21 R22 R4 R3 R25 R24 C72 C46 R58 R67 C42 R62 R71 R74 C122 R60 R54 R57 C55 C66 C30 C52 R61 C50 C43 C13 C15 R23 C18 R15 R13 C7 R10 L2 C6 IP101 D11 R14 L3 C17 R55 R35 D15 R65 R64 R59 R42 R...

Страница 61: ...SW1 SW00 SW30 SW20 SW01 SW31 SW50 SW41 SW42 SW32 SW52 SW02 SW21 SW51 SW22 SW12 SW53 SW23 SW43 SW13 CN9 SW03 SW33 D23 R82 D24 D25 R83 R84 R85 D26 R81 D22 R80 D21 D20 R79 D19 R78 R77 D18 R76 D17 D10 R51 D9 R50 R49 D8 R48 D7 R45 D4 D6 R47 D3 R44 D5 R46 KX TCA275CE CIRCUIT BOARD HANDSET Bottom View ...

Страница 62: ...scilloscope or a tester with a ground 1 The schematic diagrams and circuit board may be modified at any time with the development of new technology CN1 CK1 CK3 IP1 C1 R1 C2 C6 R8 C4 C5 C3 D1 R6 CK2 CK7 CK6 CK5 CK4 R7 R5 R4 R3 R2 Q1 Q2 PbF PSUP1712Z A KX TCA275CE CIRCUIT BOARD CHARGER UNIT Component View PbF PSUP1712Z A CHRG CHRG KX TCA275CE CIRCUIT BOARD CHARGER UNIT Bottom View ...

Страница 63: ...1 O 0 1 32 AD18 D_O AD18 O_0 1 O 0 1 33 AD19 D_O AD19 O_0 1 O 0 1 34 AD20 D_O AD20 O_0 1 O 0 1 35 AD21 D_O AD21 O_0 1 O 0 1 36 AD22 D_O NC O_0 1 O 0 1 37 AD23 D_O NC O_0 1 O 0 1 38 LE D_O SYEN O_0 1 O 0 39 SO D_O SYDA O_0 1 O Hi Z 40 SK D_O SYCL O_0 1 O 0 41 DAC ADC2 A_I ADC2 A_I I 42 P3 6 PD6 D_O KEY_BL O_0 1 O Hi Z 43 RDN D_O READ O_0 1 O 1 44 WRN D_O WRT O_0 1 O 1 45 MI READY D_IPU NC I PU_0 1 ...

Страница 64: ... O 0 94 DC_I A_I GND I I 95 P1 6 PON INT6 A_I PON I I PD 160k pull down 96 P1 7 CHARTGE INT7 A_I CHARGE I I PD 160k pull down 97 P2 6 stop_charge A_O CHARGE_STOP O O 0 98 VBAT3 RINGING A_I VBAT3 I I 99 DC_stab A_O NC O O 100 DC_Sense A_I GND I I 101 AVS_sense A_I GND I I 102 ADC3 A_I CCR I I 103 LDO1_Sense A_I LDO1_SNS I I 104 LDO1_CTRL A_O LDO1_CTRL O O 1 105 LDO2_CTRL A_O LDO2_CTRL O O 0 106 VBA...

Страница 65: ...65 KX TCA275CE 16 2 Cabinet and electrical Parts Location 16 2 1 Handset ...

Страница 66: ...66 KX TCA275CE 16 2 2 Charger Unit ...

Страница 67: ...67 KX TCA275CE 16 2 3 Accessories and Packing Materials ...

Страница 68: ...PSHE1222Z SPACER LCD SPONGE 113 PSHE1223Y SPACER BATTERY CUSHION 114 PSHG1294Z SPEAKER RUBBER SPACER 115 PSHR1357Z SPACER ANTENNA ABS HB 116 PSHS1081Z TAPE BOTH SIDE 117 PSHS1086Z TAPE BOTH SIDE LCD GRILLE 118 PSHS1089Z NET SPEAKER 119 PSJC1014Z BATTERYTERMINAL B_ 120 PSJC1015Z BATTERYTERMINAL B_ 121 PSJC1018Z BATTERYTERMINAL C_3A 122 PSJC1019Z BATTERYTERMINAL C_3B 123 PSJT1060Z TERMINAL SPEAKER 1...

Страница 69: ...00012 COIL L4 PQLQR2KA12T COIL S L601 G1C4N7Z00017 COIL L602 G1C4N7Z00017 COIL L603 PSLQR1S27NJ COIL L605 PSLQR1S27NJ COIL L606 PQLQR4C2N7S COIL S L608 PQLQR4C2N7S COIL S L610 G1C3N3ZA0061 COIL L611 G1C3N3ZA0061 COIL L614 PQLQR4C5N6S COIL S L615 PQLQR4C5N6S COIL S L616 PSLQR1S27NJ COIL L617 G1C8N2J00004 COIL L620 PQLQR4C10NJ COIL S L621 PQLQR4C10NJ COIL S L630 G1C47NJ00010 COIL L631 PSLQR1S27NJ CO...

Страница 70: ...0JCQ 68p S C652 ECUE1H020CCQ 2p S C653 ECUE1H020CCQ 2p S C654 F1G1H100A420 10p S C656 ECUE1H1R5CCQ 1 5 S C657 ECJ0EC1H080D 8p C660 F1G1H100A420 10p S C665 ECJ0EC1H080D 8p Safety Ref No Part No Part Name Description Remarks C666 ERJ2GE0R00 0 C671 F1G1H100A420 10p S C672 F1G1H100A420 10p S C673 ERJ2GE0R00 0 C675 ECJ1VB0J105K 1 C676 ECJ1VB0J105K 1 C677 ECJ1VB0J105K 1 C678 F1G1H100A420 10p S C681 ECJ0...

Страница 71: ...J102 1k R606 ERJ2GEJ102 1k R607 ERJ2GEJ102 1k R608 ERJ2GEJ102 1k R610 ERJ2GEJ103 10k R611 ERJ2GEJ392 3 9k R612 ERJ2GEJ122 1 2k R614 ERJ2GEJ223X 22k R615 ERJ2GEJ272 2 7k R623 ERJ2GEJ561 560 R625 ERJ2GEJ271 270 R626 ERJ2GEJ221 220 R633 ERJ2GEJ100 10 R634 ERJ2GEJ100 10 R645 ERJ2GEJ331 330 OTHERS E101 PSMC1125Z MAGNETIC SHIELD Safety Ref No Part No Part Name Description Remarks PCB200 PSWPCA275CEH CHA...

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