Sony NW-A806, NW-A808 service manual MAX8677AETG

Page 29

NW-A805/A806/A808/NWZ-A815/A816/A818

IC901

MAX8677AETG

GND

/FLT

/UOK

/DOK

SYS

SYS

/CHG

25

24

23

22

21 20

19

/DONE

1

DC

2

DC

3

CURRENT-LIMITED

VOLTAGE REGULATOR

INPUT

LITHIUM BATTERY

SYSTEM

CHARGER

VOLTAGE

LOAD SWITCH

MONITOR

18

BAT

17

BAT

16

USB

/CEN

4

15

USB

INPUT LIMITER &

14

TSET

PEN1

5

CHARGER THERMAL

CURRENT

REGULATION

PEN2

6

SETTING

13

USUSS

7

8

9

10 11 12

PSET

VL

GND

CT

ISET

THM

IC903		MAX1557ETB
IN	1	BIAS	0.675V		OUTPUT	10	D1
		BIAS	CURRENT-LIMIT		VOLTAGE
GND	2	CURRENT	CURRENT-LIMIT		SELECTOR
GND	2	CURRENT	COMPARATOR
		SENSE	COMPARATOR
		SENSE
		REFERENCE			SHORT-CIRCUIT
		1.25V		PWM	PROTECTION
				PWM
		SLOPE	PWM	AUTO SKIP		9	INP
		COMPARATOR	COMPARATOR	CONTROL		9	INP
		COMPARATOR	COMPARATOR	CONTROL
					DRIVER
SS	3	ERROR	CLOCK			8	LX
SS	3	ERROR	1MHZ			8	LX
		AMPLIFIER
				SKIP-OVER	ZERO-CROSS	7	PGND
OUT	4			ENTER SKIP/	ZERO-CROSS
				SR OFF	DETECT
XSHDN	5					6	D2
			11
			PGND

29

Image 29

Contents NW-A805/A806/A808 SpecificationsNW-A805/A806/A808/NWZ-A815/A816/A818 Disassembly Table of ContentsDiagrams Flexible Circuit Board RepairingFormatting Memory Format Color Variation Parts and Controls Whenusing the headphone extension cordRear Cabinet Assy Disassembly FlowMain Board Holder ConnectorAbout Holding the bent part Nand BOARD, SVX Switch Flexible PWB AssyFront Button SVX LCD Assy LCD801, Battery AssyFront Cabinet Assy Consumption current audio playback check Power supply voltage checkOperation of the Test Mode 4-1. Power Standby current check Battery voltage checkCharge current check AudioFrequency characteristic 2 check Frequency characteristic 1 checkOutput check 2. S/N checkCH separation R-ch check CH separation L-ch checkMaximum output check Normalizer checkVideo Sound pressure regulation level checkLCD display check OtherSound pressure regulation setting Destination settingKey check FormatBlock Diagram Section DiagramsAudio Video Location SemiconductorUses unleaded solder Uses unleaded solder Semiconductor Location Main Board Side BMain Board 1/6 Schematic Diagram Main /6 See page 28 for IC Block Diagrams IIC IC701 IC803 Main Board 6/6 IC301 XC6401FF58DR IC303 MAX4764ETB+TG069 IC Block Diagrams Main BoardMAX8677AETG Pin No Pin Name Description IC Pin Function DescriptionVccvbus IOBVDDL0 NANDCEZ2Capvbdl SwadpVccvbat IdpullupChgvbus FlashclkAB0CSZ2 AB0XACKSDRDATA28 ResetzSDRDATA26 LcdhsyncLcdpxclk VloginSDRDQM1 SdrwezCKI VpllDspdet LcdbltctlVana VanainAB1 VDDL0 AB2 XusbokXholdkey OscoutKeywake SPI0CSZ2DD2VFB2 VGP45INDD2LX3 DD2LX1 DD2LX2VCCIO2 B5OUTVaux B1OUTRear Cabinet Section NW-A805/A806/A808 Exploded ViewsBLACK, SILVER, VIOLET, Blue models only Rear Cabinet Section NWZ-A815/A816/A818109 Main BOARD, Nand Board Section NW-A805/A806/A808159 Main BOARD, Nand Board Section NWZ-A815/A816/A818208 207 Front Cabinet SectionMain Electrical Parts ListCeramic Chip 5PF CS42L51-CNZR Switch NW-A805 E, MX, AUS, JE NandCD-ROM Assy Russia Help Revision History