Acer B223W Service Guide

Service Guide Version and Revision
Version A00 Release Date Apr.-2-2008 Revision History Initial Release TPV model TC7AMAD8W7ABDN/ TC7AMAD8W7ABHN
Copyright Copyright 2008 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, Transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of Acer Incorporated.
Disclaimer The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose. Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software.
Intel is a registered trademark of Intel Corporation. Pentium and Pentium II/III are trademarks of Intel Corporation. Other brand and product names are trademarks and/or registered trademarks of their respective holders. Trademarks Acer is a registered trademark of Acer Incorporated. All other trademarks are property of their respective owners.
Conventions The following conventions are used in this manual: Screen messages Note Warning Caution Important Denotes actual messages that appear on screen. Gives bits and pieces of additional information related to the current topic. Alerts you to any damage that might result from doing or not doing specific actions. Gives precautionary measures to avoid possible hardware or software problems. Remind you to do specific actions relevant to the accomplishment of procedures.
Preface Before using this information and the product it supports, please read the following general information. 1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided for Acer's "global" product offering. To better fit local market requirements and enhance product competitiveness, your regional office may have decided to extend the functionality of a machine (e.g. add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered in this generic service guide. In such cases, please contact your regional offices or the responsible personnel/channel to provide you with further technical details. 2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel. If, for whatever reason, a part number change is made, it will not be noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Warning: (For FCC Certified Models) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: 1. Reorient or relocate the receiving antenna. 2. Increase the separation between the equipment and receiver. 3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 4. Consult the dealer or an experienced radio/TV technician for help. Notice: 1. The changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. 2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits. 3. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification to this equipment. It is the responsibility of the user to correct such interference. As ENERGY STAR Partner our company has determined that this product meets the ENERGY STAR guidelines for energy efficiency. Warning: To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerous high voltages are present inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only.

Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance. Use only a trolley or stand recommended by the manufacturer or sold with the monitor. If you mount the monitor on a wall or shelf, uses a mounting kit approved by the manufacturer and follow the kit instructions. Slots and openings in the back and bottom of the cabinet are provided for ventilation. To ensure reliable operation of the monitor and to protect it from overheating, be sure these openings are not blocked or covered. Do not place the monitor on a bed, sofa, rug, or similar surface. Do not place the monitor near or over a radiator or heat register. Do not place the monitor in a bookcase or cabinet unless proper ventilation is provided. The monitor should be operated only from the type of power source indicated on the label. If you are not sure of the type of power supplied to your home, consult your dealer or local power company. The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of the grounded plug. Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect the monitor from damage due to power surges. Do not overload power strips and extension cords. Overloading can result in fire or electric shock. Never push any object into the slot on the monitor cabinet. It could short circuit parts causing a fire or electric shock. Never spill liquids on the monitor. Do not attempt to service the monitor yourself; opening or removing covers can expose you to dangerous voltages and other hazards. Please refer all servicing to qualified service personnel To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured receptacles marked between 100 - 240V AC, Min. 5A. The wall socket shall be installed near the equipment and shall be easily accessible. Special Notes On LCD Monitors The following symptoms are normal with LCD monitor and do not indicate a problem. Notes Due to the nature of the fluorescent light, the screen may flicker during initial use. Turn off the Power Switch and then turn it on again to make sure the flicker disappears. You may find slightly uneven brightness on the screen depending on the desktop pattern you use. The LCD screen has effective pixels of 99.99% or more. It may include blemishes of 0.01% or less such as a missing pixel or a pixel lit all of the time. Due to the nature of the LCD screen, an afterimage of the previous screen may remain after switching the image, when the same image is displayed for hours. In this case, the screen is recovered slowly by changing the image or turning off the Power Switch for hours.

Table Of Contents

Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Support Timing Monitor Block Diagram Main Board Diagram Software Flow chart Main Board Layout Installation Attaching/Removing the base Chapter 2 Operating Instructions External Controls Front Panel Controls eColor Management (OSD) How to Adjust a Setting LOGO Chapter 3 Machine Disassembly 28

Chapter 4 Chapter 5

Troubleshooting Connector Information

Chapter 6

FRU (Field Replacement Unit) List Exploded Diagram

Chapter 7

Schematic Diagram

Monitor Features

Introduction

Chapter 1

This specification defines the requirements for the 22 MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly connected to general 15-pin D-sub VGA connector and 24 pin DVI connector, also supports VESA DPMS power management and plug & play function. Description The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no radiation. This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 50k hours or more.

Chart of B223W

Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel LTM220M1-L01 (10S) SZ SEC D-Sub 15-pin/DVI 24-pin Separate / Compatible Support DDC2B TC7AMAD8W7ABDN(Yes) TC7AMAD8W7ABHN(No) TC7AMAD8W7ABDN(Yes) TC7AMAD8W7ABHN(No) No Not support Yes / Yes

Electrical Requirements

Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time Analog Input signal Control temperature User brightness control User contrast control Picture position and size Viewing angle AC Supply voltage Ambient temperature Humidity Display mode e-color mode Dark room (< 1 cd/m2) 35-50cm 30 minutes 700 mVss 6500 K The value under user mode Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0 700mv) can be distinguished. Factory preset value 90+/-20 H and 90+/-10 V 230V 5, 503Hz 20+5 65% 20% 1680x1050, 60 Hz, all white Set to User mode

Measurement systems The units of measure stated in this document are listed below: 1 gamma = 1 nano tesla 1 tesla = 10,000 gauss cm = in x 2.54 Lb = kg x 2.2 Degrees F = [C x 1.8] + 32 Degrees C = [F - 32]/1.8 u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3) x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] nits = cd/(m2) = Ft-L x 3.426 lux = foot-candle x 10.76
LCD Monitor General Specification
Driving system Active Display Area Pixel pitch Contrast Ratio Response time Luminance of White Separate Sync. Input H-Frequency V-Frequency Viewing angle Display Colors Display mode EPA ENERGY STAR OFF Mode Contrast control < 1W (H)160 (V) 160(Type) 16.7M 1680 x 1050 @60Hz ON Mode < 49W TFT Color LCD 473.76(H) x 296.1(V) 0.282(H) x 0.282(W) 1000 : 1 5ms 300(Typ.) cd/ H/V TTL 30kHz 83kHz 56-76Hz

LCD Panel

Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0 700mv) can be distinguished. 90 V ~ 240 V50 3Hz, 60 3Hz Operating Temp: 0 to 40C

Power Source

Environmental Considerations
Storage Temp: -30 to 65C Operating Humidity: 0% to 90% Storage Humidity: 0% to 90%
Peak surge current Power line surge
< 100 A peak at 230 VAC and cold starting&25 & DC Output at Full-load No advance effects (no loss of information or defect) with a maximum of 1 half-wave missing per second

LCD Panel Specification

LTM220M1-L01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. The resolution of a 22 is 1680 x 1050 and this model can display up to 16.7 millions colors.

General Specifications

Mechanical Information
Electrical Characteristics

Optical Specifications

Support Timing
Horizontal Nominal Mode Resolution 640x480@60Hz VGA 640x480@72Hz 640x480@75Hz 800x600@56Hz SVGA 800x600@60Hz 800x600@72Hz 800x600@75Hz 1024x768@60Hz XGA 1024x768@70Hz 1024x768@72Hz 1024x768@75Hz 1152x864@75Hz 1280x1024@60Hz 1280x1024@70Hz SXGA 1280x1024@72Hz 1280x1024@75Hz 1280x960@60Hz 1440x900@60Hz WSXGA UXGA 1680x1050@60Hz 1600x1200@60Hz Total 800 x x x x x x 666 1056x625 1344x806 1328x806 1304x798 1312x800 1600X900 1688x1066 1688x1066 1688x1066 1688x1066 1800x1000 1904x934 2240x1089 2160x1250 Frequency +/- 0.5kHz 31.469 37.861 37.500 35.156 37.879 48.077 46.875 48.363 56.476 57.7 60.023 67.5khz 63.981 74.4 77.9 79.55.93 65.N N N N/P P P P N N P P P P P P P P P N P Sync Polarity Vertical Nominal Freq. +/- 1 Hz 59.940 72.809 75.00 56.250 60.317 72.188 75.000 60.004 70.75.60.72 75.60 59.N N N N/P P P P N N P P P P P P P P P P P Sync Polarity Nominal Pixel Clock (MHz) 25.175 31.500 31.500 36.000 40.000 50.000 49.500 65.000 75.000 78.4 78.750 108.000 108.000 124.9 134.6 135.106.5 146.25 162

Monitor Block Diagram

The LCD MONITOR will contain a main board, a power board, and key board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.

CCFL Drive.

Flat Panel and CCFL backlight
Inverter Board (Include adapter)

Main Board

Key board

Input : D-SUB Signal

Input : DVI Signal

AC-IN 90V-264V

Main Board Diagram
Crystal14.31818MHz (X201)

LCD PANEL (CN301)

FLASH ROM PM25LV010A (U402) EPR_SDA EPR_SCL H sync V sync RGB
Scalar IC TSUMU58BWHL-LF (Include ADC, OSD, MCU) (U202)
EEPROM D-Sub Connector (CN101) DVI Connector (CN103) M24C04-WMN6TP (U204)

Software Flow Chart

Y 2 N 3

10 Y N 12 Y 14

13 Y 15 Y 17

Remark:

1) MCU initializes. 2) Is the EEPROM blank? 3) Program the EEPROM by default values. 4) Get the PWM value of brightness from EEPROM. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light. 12) Check the analog port, are there any signals coming? 13) Does the scalar send out an interrupt request? 14) Wake up the scalar. 15) Are there any signals coming from analog port? 16) Display "No connection Check Signal Cable" message. And go into standby mode after the message disappears. 17) Program the scalar to be able to show the coming mode. 18) Process the OSD display. 19) Read the keyboard. Is the power key pressed?

Main Board Layout

Symbol CN201 CN401 CN301 CN101 CN103 U101 WAFER
Description WAFER 9P RIGHT ANELE PITCH CONNECTOR D-SUB 15PIN DVI 24PIN CONN F M24C02-WMN6TP

Symbol U202 U702 U701 U204 U102 U402
Description IC TSUMU58BWHL-LF PQFP-100 IC AZ1117D-1.8-E1 AP1117E33LA IC M24C04-WMN6TP SO8 M24C02-WMN6TP IC PM25LV010A-100SCE SOIC-8

Installation

To install the monitor on your host system, please follow the steps below: Steps 1.Connect the video cable A: Make sure both the monitor and computer are switched off. B: Connect the VGA video cable to the computer. C: Connect the digital cable (only for dual-input models). (1) Make sure both the monitor and computer are switched off. (2) Connect one end of the 24-pin DVI cable to the back of the monitor and the other end to the computer's port. 2.Connect the power cord Connect the power cord to the monitor, then to a properly grounded AC outlet. 3.Turn on the monitor and computer Turn on the monitor first, then the computer. This sequence is very important. 4.If the monitor does not function properly, please refer to the troubleshooting section to diagnose the problem.
Attaching/Removing The Base
Install: Align the base with the stand and push the base towards the top of the monitor, and then rotate the base clockwise. Tighten the screw clockwise.
Remove: Reverse the steps to remove the base.
Screen Position Adjustment
In order to optimize the best viewing position, you can adjust the height/tilt/swivel/pivot of the monitor. Height Adjustment After pressing the top of the monitor, push the lock button towards right, then you can adjust the height of the monitor.
Tilt Please see the illustration below for an example of the tilt range.
Swivel With the built-in pedestal, you can swivel the monitor for the most comfortable viewing angle.
Monitor Pivot Adjust height to the top position before rotation the monitor. Rotate clockwise until the monitor stops at 90.

Operating Instructions

monitor. By changing these settings, the picture can be adjusted to your personal preferences. The power cord should be connected. Connect the video cable from the monitor to the video card. Press the power button to turn on the monitor position. The power indicator will light up.

Chapter 2

Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the

External Controls

Front panel controls
1 Power LED: Lights up to indicate the power is turned on. 2 Power Switch: Turn the power on or off. 3.4 < / > : Press < or > to navigate to the desired function, press Enter to select the function. Press < or > to change the settings of the current function. 5 Menu/Enter: Activate the OSD menu when the OSD is off or activate deactivate the adjustment function when the OSD is on. 6 Auto adjust button/Exit: a. When the OSD menu is active, this button will act as the exit key exit OSD menu). b. When the OSD menu is inactive, press this button for two seconds to activate the Auto Adjustment function. The Auto Adjustment function s used to set the HPos, VPos, Clock and Focus. 7 Empowering Key/Exit: a. When the OSD menu is active, this button will act as the exit key exit OSD menu). b. When the OSD menu is inactive, press this button to select scenario mode.

eColor Management (OSD)

How to Adjust a Setting

Adjusting the picture

When the monitor is power on, the LOGO will be showed in the center, and disappear slowly.
How To Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities. The DDC2B is a bi-directional data channel based on the IC protocol. The host can request EDID information over the DDC2B channel. This monitor will appear to be non-functional if there is no video input signal. In order for this monitor to operate properly, there must be a video input signal. This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signals this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver" feature except the display is completely off. Pressing a key on the keyboard, or clicking the mouse restores the display. Using The Right Power Cord The accessory power cord for the Northern American region is the wallet plug with NEMA 5-15 style and is UL listed and CSA labeled. The voltage rating for the power cord shall be 125 volts AC. Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting of a minimum No. 18 AWG, type SJT or SVT three conductors flexible cord. One end terminates with a grounding type attachment plug, rated 10A, 250V, and CEE-22 male configuration. The other end terminates with a molded-on type connector body, rated 10A, 250V, having standard CEE-22 female configuration. Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European counties.

Machine Disassembly

Chapter 3
This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance.

Disassembly Procedure

1. Remove the HINGE ASSEMBLY as the following indicator. (Fig 1)
Fig 1 2. Remove the back cover and bezel. (Fig 2)

Fig 2 28

Remove the lamp connectors and the screw. (Fig 3-4)
Fig 4 4. Remove the screws to remove the panel. Put attention to the LVDS cable.(Fig 5)
Fig 5 5. Remove the screws to remove the main board and power board.( Fig 6)

Troubleshooting

This chapter provides troubleshooting information for the B223W:

1. No Power

Chapter 4

No power

Press power key and look if the picture is normal
Please reinsert and make sure the 5V and 12V input is normal NG Reinsert or check the power section
Measure U701 Pin2=3.3V and U702 PIN2=1.8V Check CN401 or

replace U701,U702

Check X201 oscillate waveforms are normal NG OK Replace X201

Check U202

2. No Picture (LED is orange)

No picture

The button if under control

oscillate

NG Replace X201

waveform is normal OK

OK Check reset circuit of U202 is normal Measure U701 PIN2=3.3V OK Replace U202 OK NG Replace U701, U702 OK NG Replace X201 and U702 PIN2=1.8V NG Check Correspondent component

waveform is normal

Check HS/VS from CN101 is normal OK Replace U202 NG Check Correspondent component

3. Panel Power Circuit

White screen
Measure Q304 base is low level?
Check X201 oscillate waveform is normal
OK Check Q302,Q303,Q304 is broken or CN301 solder?

Replace X201

Check reset circuit of U202 is normal
Check Correspondent component.

NG OK OK

Replace U202

Replace PANEL

4. Key Board
OSD is unstable or not working
NG Is Key Pad Board connecting normally? Connect Key Board
Y NG Is Button Switch normally?

Replace Button Switch

Y NG Is Key Pad Board normally?

Replace Key Board

Check Main Board

5. Power Board No power

Check to CN902 Pin10,11 =14V and Pin6,7 = 5 V

Check Interface board

Check AC line volt 120V or 220V
NG OK Check the voltage of C905(+) NG OK Check start voltage for the Pin2 of IC901 NG OK
Change F901, Check BD901, L901, IC901
Check bridge retified circuit

Change IC901

Check the auxiliary voltage is smaller than 20V NG Check IC901 OK Check T901,D906, D907, Q903,ZD921,ZD922,IC904,IC903

W/LED No Backlight

Check the 14V voltage input NG

Check the adapter

Check ON/OFF signal NG
Check IC801 pin12=12V? NG OK

Change Q805.Q808 or Q810

Check the pin9&10 of IC801 have PWM wave NG Change Q801/Q804/Q811/Q812

OK Replace IC801

Check the resonant wave of pin3 & pin7 for T801 OK NG Check Q802/Q803
Check the output of T801,T802 NG

Change T801,T802

Check connecter & lamp

Connector Information

The following figure shows the connector locations on the monitor: D-SUB connector

Chapter 5

DVI Connector
FRU (Field Replaceable Unit) List
chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of B223W.Refer to this
NOTE: Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel (http://aicsl.acer.com.tw/spl/). For whatever reasons a part number change is made, it will not be noted in the printed Service Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts for repair and service of customer machines. NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it.
Exploded Diagram (Model: B223W)

Part List

Above picture show the description of the following component. Item Picture Description

C215 0.1uF/16V

C216 0.1uF/16V

PANEL_VCC
R203 10K 1/16W 5% R233 6K8 1/16W 5% R234 C231 10K 1/16W 5%

VCC3.3 CMVCC VCC3.3

C218 0.22uF16V R210 10K 1/16W 5% 3 4

R205 10K 1/16W 5%

U402 CE VCC SO HOLD# WP# SCK GND SI PM25LV010A 3 PPWR_ON# R219 100K 1/16W 5% SDO SCZ SCK SDI GPIO_P45/PWM1 RST
GPIO_P15/PWM0 PWM2/GPIO_P24 GPIO_P25 PWM3/GPIO_P27 GPIO_P00/SAR0 GPIO_P01/SAR1 GPIO_P02/SAR2 GPIO_P03/SAR3 GPIO_P07 GPIO_P15 PWM1/GPIO_P16 GPIO_P12 GPIO_P13 GPIO_P14/PWM0

100R 1/16W 5% WP

0.1uF/16V on_BACKLIGHT 4 adj_BACKLIGHT 4

R208 6K8 1/16W 5%

R209 10K 1/16W 5%

R211 C219

10K 1/16W 5%
Q202 2N3906S-RTK/PS Q203 2N3906S-RTK/PS R216 LED_GRN/BLUE 75R 1/16W 5% R212

LED_ORANGE

C220 CMVCC 10uF/50V +

DET_CABLE

0.1uF/16V R206

120R 1/16W 5%

RC221 22pF

0R05 1/16W X201

Volume# NC Q205 NC

C222 22pF

C223 0.1uF/16V 80
100R 1/16W 5% XOUT R235 NC BYPASS GPIO_P10/I2C_MCL GPIO_P11/I2C_MDA GND GND GND GND GND GND GND GND GND GND R224 100R 1/16W 5% R225
POWER_KEY # VCC3.3 R223 10K 1/16W 5%

MSCL 100R 1/16W 5% MSDA

MODE[0] MODE[1]

R226 10K 1/16W 5%

R227 10K 1/16W 5%
VCC3.3 R230 10K 1/16W 5% MSCL MSDA

R228 3.9K OHM 1% 1/16W

R229 3.9K OHM 1% 1/16W KEY 2 KEY 1 POWER_KEY # LED_GRN/BLUE LED_ORANGE
R232 10K 1/16W 5% 10K 1/16W 5% EE_WP
C224 U5 VCC NC WC E1 SCL E2 SDA VSS 0.22uF16V 3 4

C225 0.1uF/16V

C226 0.1uF/16V

C227 0.1uF/16V

C228 0.1uF/16V

C229 0.1uF/16V

M24C04-WMN6TP

Near to Connect

Power board
100 OHM 1/4W ROHM 1/4W R919 BD901 2KBP08M OHM 1/4W R920 + L904 1.1uH + + + C922 NC Q903 PMBS3904 1
C912 0.001uF C917 680uF/25V 3
R941 R946 1K 1/4W 1K 1/4W

R945 1K 1/4W

R944 1K 1/4W

+14V ZD902 RLZ TE-11 16B

4 C905 100uF/450V + R904 300K OHM 1/4W C938 1500pF/1KV R932 300K OHM 1/4W R905 NC C906 1500pF 2KV R908 100K OHM 2W

T901 9

C918 680uF/25V

R943 1K 1/8W

2 ZD901 NC

D906 SP10100 ROHM 1/4W 4

C904 NC

C932 0.001uF

R939 NC

R906 NC

D900 FR107
C929 0.001uF ROHM 1/4W ROHM 1/4W C939 1000uF/16V D907 NC 1 + + C940 1000uF/16V L903 1.1uH C915 470uF/16V R924 150R 1/8W ZD921 RLZ18B ZD922 RLZ5.1B + R940 33K 1/10W

+5V FUSE

+ R933 300K OHM 1/4W D8 R910 10R 1/4W 2 ZD905 NC R912

4 4.0mH

R915 100K OHM 1% 1/8W 2 1

C908 22uF/50V

3 D905 SP1060

12 POWER X'FMR

3 L901 2

C907 0.1uF

ZD906 NC

R907 NC

D901 FR103

R909 5.1 OHM 1/4W

IC901 RT NC VCC CS COMP VCC GND OUT LD7552BPS

LL4148

C903 0.47uF/275V
4 Q901 2SK2645-54MR R938 10K 1/8W 1 1
R927 3.6K OHM 1% 1/10W IC903 PC123X2Y FZOF R925 1K 1/8W D916 LL4148

D915 LL4148

R903 680K OHM 1/4W

FB901 BEAD

C924 0.1uF
220 OHM 1/4W 680K OHM 1/4W 680K OHM 1/4W C928 0.001uF C909 470pF/25V
R914 0.43 OHM 2W IC904 KIA431A-AT/P

R926 1K 1/10W 1%

R942 1K 1/10W 1%

NR901 NTCR

VAR901 NC
C925 NC C916 0.1uF C930 0.1uF CN902 HARNESS

R930 2.43K OHM 1% 1/10W

F901 FUSE
GND1 GND HS5 HEAT SINK(U601)

C921 0.0047UF/400V

USB CTRL +14V

+5V DIM ON/OFF VOL MUTE

2 SW901

C902 0.001uF/250V

C901 0.001uF/250V
HS2 HEAT SINK(D906) HS1 HEAT

HS3 HEAT SINK(Q901) 2

HS4 HEAT SINK(D905)

CN901 SOCKET

C838 1500pF ROHM 1/4W 5 ROHM 1/4W 6 7

E T801 POWER X'FMR C B

2 D805 BAWR817 10K 1/10W 1% R821 1K 1/10W 1% 2 C819 0.0022uF R801 D801 1.5K OHM 1% 1/10W BAV99

HV LV CN801 CONN

F801 0R05 1/4W +14V C802 470uF/25V + C824 0.1uF D810 NC

C801 5pF/6KV 9

R804 100R 1/8W
R819 3.6K OHM 1% 1/10W Q801 PMBS3904
Q805 PDTC144WK ON/OFF C807 0.1uF/25V
Q808 PDTA144WK Q804 PMBS3906 1

R823 3.6K OHM 1% 1/10W

Q802 AM9945N-T1-PF 5 G D S G S D D D 8

C839 1500pF

R828 10K 1/10W 1% R822 1K 1/10W 1% 2

HV LV CN802 CONN

ROHM 1/8W

Q811 PMBS3904

D811 NC
C841 1500pF ROHM 1/4W 7 ROHM 1/4W

T802 POWER X'FMR 8

C823 0.0022uF
R814 D802 1.5K OHM 1% 1/10W BAV99

Q812 PMBS3906 1

C803 470uF/25V +
C805 0.1uF D812 NC Q803 AM9945N-T1-PF 5 G D S G S D D D 8 C840 1500pF
C811 5pF/6KV 9 B 3 C E R834 10K 1/10W 1% R812 1K 1/10W 1% 2 C816 0.0022uF R816 D804 1.5K OHM 1% 1/10W BAV99

1 D808 BAW56 2

HV LV CN804 CONN

4 R827 1K 1/10W 1% 1

Q806 PMBS3904

R853 68K OHM 1% 1/10W

D813 NC R833 10K 1/10W 1% R809 1K 1/10W 1% 2 C815 0.0022uF R815 D803 1.5K OHM 1% 1/10W BAV99

HV LV CN803 CONN

D817 LL4148
R813 10K 1/10W 1% R808 10K 1/10W 1% Q810 RK7002 R811 2.4K OHM 1% 1/10W
D809 LL4148 R841 68K OHM 1% 1/10W

R802 NC

R851 9.1K 1%

C806 0.01uF

R829 22R 1/8W

R825 22R 1/8W

R837 47K 1/8W

C822 1uF/25V

R832 10K 1/10W 1% 7 8
IC801 1IN+ 2IN+ 1IN2INFEEDBACK REF DTC OUTPUT CTRL CT VCC RT C2 GND E2 C1 E1 TL494IDR 10 9

R806 68K OHM 1% 1/10W

D814 LL4148

VOL+ AUTO

1 JB41-03521

VOL- (GND)

LBADC1

POWER_Key 12

ECOLOR(GND) 0 V

CONNECTOR

ECOLOR AUTO