Sony Ericsson NWZ-A826K, NWZ-A828 Output check, 2. S/N check, Frequency characteristic 1 check

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4-2-1. Output check

“1 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output- ted.

Checking method:

1.Enter the test mode.

2.Press the [v]/[V] key to select the “AUDIO”, and press the [B] key to enter the minor item.

3.Press the [v]/[V] key to select the “OUTPUT”.

4.Press the [u] key, “1 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is outputted.

liquid crystal display

AUDIO OUTPUT 1kHz 0dBs L/Rch HPOUT [ VOL: 25 ]

START

5. Press the [BACK] key, return to minor item selection screen.

4-2-2. S/N check

“Infinity Zero VOLUME: 30” audio signal is outputted.

Checking method:

1.Enter the test mode.

2.Press the [v]/[V] key to select the “AUDIO”, and press the [B] key to enter the minor item.

3.Press the [v]/[V] key to select the “SN”.

4.Press the [u] key, “Infinity Zero VOLUME: 30” audio signal is outputted.

liquid crystal display

AUDIO SN

Infinity Zero

HPOUT [ VOL: 30 ]

START

5. Press the [BACK] key, return to minor item selection screen.

NWZ-A826/A826K/A828/A828K/A829

4-2-3. Frequency characteristic 1 check

“20 Hz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output- ted.

Checking method:

1.Enter the test mode.

2.Press the [v]/[V] key to select the “AUDIO”, and press the [B] key to enter the minor item.

3.Press the [v]/[V] key to select the “F1”.

4.Press the [u] key, “20 Hz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is outputted.

liquid crystal display

AUDIO F1

20Hz 0dBs L/Rch HPOUT [ VOL: 25 ]

START

5. Press the [BACK] key, return to minor item selection screen.

4-2-4. Frequency characteristic 2 check

“20 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is output- ted.

Checking method:

1.Enter the test mode.

2.Press the [v]/[V] key to select the “AUDIO”, and press the [B] key to enter the minor item.

3.Press the [v]/[V] key to select the “F2”.

4.Press the [u] key, “20 kHz 0 dBs L-ch/R-ch VOLUME: 25” audio signal is outputted.

liquid crystal display

AUDIO F2

20kHz 0dBs L/Rch HPOUT [ VOL: 25 ]

START

5. Press the [BACK] key, return to minor item selection screen.

11

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Contents 889-048-01 NWZ-A826/A826K/A828/A828K/A829NWZ-A826/A826K/A828/A828K/A829 Section Servicing Notes DisassemblyDiagrams Flexible Circuit Board RepairingNWZ-A828K AEP, UKNWZ-A826K General SectionCover REAR, Rear Assy Section DisassemblyDisassembly Flow Main Board Battery LCD Assy Operation of the Test Mode 4-1. Power Section Test ModePower supply voltage check Audio Battery voltage detection checkStandby current check Charge current check2. S/N check Frequency characteristic 1 checkFrequency characteristic 2 check Output checkNormalizer check CH separation L-ch checkCH separation R-ch check Maximum output checkOther Sound pressure regulation level checkVideo LCD display check Liquid crystal display is checkedFrequency check that presses key Destination settingSound pressure regulation setting Key checkTREBLE-Gain/Fc setting Clear stereo setting With cableClear stereo setting No cable BASS-Gain/Fc settingShutdown Bluetooth address setting Bluetooth address is setBluetooth connection check Section Diagrams Block Diagram PANEL, Power Supply Section Side B For Printed Wiring BoardsFor Schematic Diagrams Side aSemiconductor Location Printed Wiring Board Main Board Side a Uses unleaded solderPrinted Wiring Board Main Board Side B Uses unleaded solder 123 Main Board 1/7 IC701 123 Main Board 3/7 Board See page 32 for IC Block DiagramsMain Board Main Board 6/7 Main Board 7/7 Uses unleaded solder SW Board Side a SW Board Side B123 SW Board 1/2 SW Board 2/2 IC301 XC6401FF58DR IC Block Diagrams Main BoardSW Board MAX8671CETL+TG069IC Pin Function Description Vccvbus NandwezIOB GNDVDDL1 NANDRBZ0Nandale NANDDA2Btxrst LcdenableUsbsuspd NANDRBZ1LCDG4, LCDG5 ResetzNANDCEZ0 LCDB0Psmlodet VloginSdrcasz WakeupTM2 TustoSDRA0 SdrclkAD7 SPI0CSZ2 AD4 XholdkeyAD5 Keywake AD6VGP1 DD1INB1, DD1INB2DD1VFBK2 DD1GNDACover Rear Section Section Exploded ViewsRear Assy Section Main Board Section 106 1-756-702-11 BATTERY, Lithium ION StorageFront Section Main Section Electrical Parts ListCeramic Chip 5PF CONNECTOR, FFC/FPC ZIF 11PMULTIPLE, Connector LED SMLA13BDTT86ST BluetoothTransistor EMX18 InductorCOIL,COMMONMODECHOKE SMD1210 TransistorTERMINAL, Contact Short Chip SwitchSWITCH, Tactil Reset SWITCH, Slide Hold TerminalVaristor CONNECTOR, FFC/FPC ZIF 39PINBATTERY, Lithium ION Storage Battery Assy US, CND, AEP, UK, FR, EENWZ-A826K AEP/NWZ-A828K AEP AccessoriesMANUAL, Instruction English NWZ-A828K AEPMemo Ver Date Description of Revision Revision History