LITE-ON EC150AT Service Manual

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Page 1

Service Manual

15-inch LCD Monitor EC150ATA

Page 2

EC-150ATA

Table of Contents

1. Audio circuit --------------------------------------------------------------------------------------------------------------- 1

1.1 Audio input ------------------------------------------------------------------------------------------------------------ 1

1.2 Audio output ---------------------------------------------------------------------------------------------------------- 1

2. Power supply -------------------------------------------------------------------------------------------------------------- 1

3. On-screen circuit ---------------------------------------------------------------------------------------------------------- 1

4. Video input circuit -------------------------------------------------------------------------------------------------------- 1

5. Definition converter LSI peripheral circuit ---------------------------------------------------------------------------- 1

6. System reset, LED control circuit --------------------------------------------------------------------------------------- 2

7. E2PROM for PNP --------------------------------------------------------------------------------------------------------- 2

8. E2PROM -------------------------------------------------------------------------------------------------------------------- 2

9. CPU circuit ----------------------------------------------------------------------------------------------------------------- 2

9.1 Dection of POWER switch status ---------------------------------------------------------------------------------- 2

9.2 Display mode identification ----------------------------------------------------------------------------------------- 2

9.3 User control ----------------------------------------------------------------------------------------------------------- 4

9.4 Control of identification converter LSI (IC 14) ------------------------------------------------------------------ 5

9.5 I2C bus control -------------------------------------------------------------------------------------------------------- 5

9.6 Power ON sequence -------------------------------------------------------------------------------------------------- 6

9.7 Power OFF sequence ------------------------------------------------------------------------------------------------- 7

9.8 List of CPU assignments--------------------------------------------------------------------------------------------- 8

10. Inverter Protective circuit for back light ------------------------------------------------------------------------------- 9

11. USB circuit -----------------------------------------------------------------------------------------------------------------9

11.1 3.3V cutoff circuit for USB identification ----------------------------------------------------------------------- 9

11.2 USB hub control circuit -------------------------------------------------------------------------------------------- 9

11.1 Lower port circuit --------------------------------------------------------------------------------------------------- 9

11.1 DC/DC converter circuit ------------------------------------------------------------------------------------------------- 9

IndexCircuit Description

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EC-150ATA

1. Audio circuit (Circuit diagrams Main PWB 1/1 JACK PWB 1/1)

1.1 Audio input The audio signal input received from the audio input terminal (JK011) is applied to the pre-amplifier I006 of 2 (L-CH) and 3 (R-CH) through the low-pass filter consisting of R047, R049, R048, R050, C013 and C014. In this pre-amplifier, controls of Volume, Balance, Bass, and Treble are conducted. The audio signal controlled at the pre-amplifier is entered in and amplified at the AMF I007 of 2 (L-CH) and 1 (R-CH). Since then, the signal is output to the jack board through a cable.

1.2 Audio output The audio signal is output from the head-phone output terminal (JK001) of the jack board to the speaker system or the head-phone. When the stereo mini-plug is inserted in the head-phone output terminal, output from the speaker is suspended, but the audio signal attenuated by resistors R001 and R002 is output to the stereo mini-plug side.

2. Power supply (Circuit daigrams MAIN PWB 7/8)

1. I314:DC-DC converter A 5V power supply for LCD module, CPU, and logic is generated from the 12V source.

2. I315:3-terminal regulator A 3.3V power supply for LCD module is generated from the 5V source.

3. I315:3-terminal regulator A 3.3V power supply for I317 analog is generated from the 5V source.

4. I315:3-terminal regulator A 3.3V power supply for I317 digital is generated from the 5V source.

Q303, I312 ON/OFF control for LCD Module ON/OFF control is performed for power ON/OFF and also for the power saving sequence.

3. On-screen circuit (Circuit diagrams Main PWB 3/8)

I310 (MTV130P-30) is an OSD IC. The HREF Signal, the OSDVS signal (horizontal / vertical sync signal in negative polarity), and the OSDTCLK signal (dot clock for OSD display) are received from I317 (Circuit diagram MAIN PWB 3/8 gmZAN1), and the OSD functions controlled by IIC interface (pin 7, pin 8). Using these data, and On-screen menu screen is established and the resultant data are output to I317 (Circuit diagram MAIN PWB 3/8, gmZAN1).

4. Video input circuit (Circuit diagram MAIN PWB 4/8)

The AC-coupled video signal is used to clamp the black level at 0V).

5. Definition converter LSI peripheral circuit (Circuit diagram MAIN PWB)

I317 gmZAN1 is the definition converter LSI. The analog R, G, B signal input entered from the video input circuit is converted into the digital data of video signal through the incorporated A/D converter. Based on this conversion, this device performs interpolation during pixel extension. The source voltage for this device is 3.3V and the system clock frequency is 50MHz. The withstand voltage level for the input signal voltage if I317 is 3.3V and 5V.

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EC-150ATA

6. System reset, LED control circuit (Circuit diagram MAIN PWB 2/8, 3/8)

6.1 System reset System reset is performed by detecting the rising and falling of the 5V source voltage at I301.

6.2 LED control circuit Green / amber is lit with the control signal of the LED GREEN and LED AMBER signal pin 15, 12 from I307 (Circuit diagram MAIN PWB 2/8).

7. E2PROM for PnP (Circuit diagram MAIN PWB 2/8)

8. E2PROM (Circuit diagram MAIN PWB 2/8)

Data transfer between I305 (AT24 C16) and CPU (Circuit diagram MAIN PWB 2/8 (I302) is effected through the IIC bus SCL (pin 15) and SDA (pin 16) of I302. The data to be transferred to each device are stored in I305.

l I317 control data. l OSD related setting data. l Other control data for service menu.

9. CPU circuit (Circuit diagram MAIN PWB 2/8)

I302 (80C51RA2) functions as the CPU. The source voltage for the device is 5.0V and the system clock frequency is 20MHz.

9.1 Detection of POWER switch status The CPU identifies the ON status of the two power supplies. The identification is made when the power supply is turned off. For example, if the power supply is turned off with the POWER switch, the POWER switch must be turned on when activating the power supply again. If the power supply is turned off by pulling out the power cord, then this power supply can be turned on by connecting the power cord, without pressing the POWER switch.

9.2 Display mode identification

9.2.1 Functions (1) Display mode identification

l The display mode of input signal is identified based on Table 1, and according to the frequency and polarity

(HPOL, VPOL) of horizontal or vertical sync signal, presence of the horizontal or vertical sync signal, and the discrimination signal (HSYNC_DETECT, VSYNC_DETECT).

l In MOD [3] [4], inappropriate polarity, composite sync, and sync ON green are indentified as MOD [4]. l When the mode has been identified through the measurement of horizontal and vertical frequencies, the total

number of lines is determined with a formula of  Horizontal frequency / Vertical frequency = Total number of lines. Final identification can be made by examining the coincidence of the obtained figure with the number of lines for the mode identified from the frequency. The boundary number of lines in each mode is shown in Table 2.

l When the detected frequency if the sync signal has changed, the total number of lines should be counted even

through it is rge identified frequency in the same mode. Then, it is necessary to examine whether the preset value for the vertical display position of Item 4-3 has exceeded the total number of lines. If exceeded, a

maximum value should be set up, which does not exceed the vertical display position of Item 4-3. (2) Power save mode. This power save mode is assumed when the frequency of the horizontal / vertical signal is as specified below.

l Vertical frequency : Below 24 KHz l Horizontal frequency : 75 KHz or above, l VTOTAL : 1027 or more.

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EC-150ATA

)

(3) Asset management As an action for asset management, the potential at the WRITE PROTECT pin is turned to be H if there is a vertical input of vertical frequency (42 Hz +/- 1 Hz), For more detailed setting method, refer to 4-6-5-14 (8). During this operation, this system stays in the Out-OfRange mode. (4) Power save mode. The power save mode is assumed when the horizontal / vertical signals are as specified below.

l If there is no horizontal sync signal input. l If there is no vertical sync signal input. l If the horizontal sync signal is outside the measuring range of gmZAN1. l If the vertical sync signal is outside the measuring range of gmZAN1.

Table 1

Signal

Preset Mode HSYNC: Frequency VSYNC:

No.

1 640 x 400 (56)24 KHz < fH < 30.8 KHz 21.053 24.830 56.432

2 640 x 480 (60)30.8 KHz < fH < 33 KHz FV < 63 Hz 25.175 31.469 59.992

3 720 x 350 (70

4 720 x 400 (70

5 800 x 600 (56)33 KHz < fH < 43 KHz FV < 58 Hz 36.000 35.156 56.250

6 800 x 600 (60

7 640 x 480 (66

8 640 x 480 (72

9 640 x 480 (75

10 720 x 350 (85

11 720 x 400 (85

12 800 x 600 (75)43 KHz < fFH < 47.2 KHz FV < 80 Hz 49.500 46.875 75.000

13 640 x 480 (85

14 1024 x 768 (60)47.2 KHz < fH < 51 KHz FV < 63 Hz 65.000 48.363 60.004

15 800 x 600 (72

16 832 x 624 (75

14 1024 x 768 (60)51 KHz < fH < 55 KHz FV < 70 Hz 70.490 52.448 60.004

17 800 x 600 (85

18 1024 x 768 (70)55 KHz < fH < 59 KHz 75.000 56.476 70.069

19 1024 x 768 (75)59 KHz < fH < 62 KHz 78.750 60.023 75.029

20 1024 x 768 (85)62 KHz < fH < 75 KHz 94.500 68.677 84.977

Fre

uenc

58 KHz < fV< 63 KHz 63 KHz < fV< 68 KHz 68 KHz < fV< 74 KHz 74 KHz < fV SEP - - 31.500 37.500 75.000

80 Hz < fV 36.000 43.269 85.008

63 Hz < fV < 73 Hz 73 Hz < fV 57.283 49.725 74.550

70 Hz < fV 56.250 53.674 85.061

SYNC

HSYNC:

TYPE

OTHER OTHER OTHER

Polarit

SEP + - 25.175 31.469 70.087

SEP - + 25.175 31.469 70.087

SEP + - 31.500 37.861 85.080

SEP - + 31.500 37.861 85.080

VSYNC:

Polarit

DOTCLK fH(KHz)FV (Hz

40.000 37.879 60.317

30.240 35.000 66.611

31.500 37.861 72.809

50.000 48.077 72.188

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Table 2 the number of the lines, Vsync distinction

EC-150ATA

Indication resolution The number of the

distinction lines

The mode of 400 line and

under

640 x 480 487 < LINE < 607 fV < 63 Hz 6

800 x 600 607 < LINE < 777 fV < 58 Hz 11

832 x 624 640 < LINE -16

1024 x 768 768 < LINE < 870 fV < 63 Hz 17

1152 x 864 870 < LINE < 1031 UN SUPPORT 1280 x 960 960 < LINE < 1027 UN SUPPORT

1280 x 1024 1027 < LINE UN SUPPORT

LINE < 487 fV < 63 Hz 3

Distinction Vsync The fixed mode

63 Hz < fV < 78 Hz 1

78 Hz < fV 11

63 Hz < fV < 68 Hz 7 68 Hz < fV < 74 Hz 8 74 Hz < fV < 78 Hz 9

78 Hz < fV 10

58 Hz < fV < 63 Hz 12 63 Hz < fV < 73 Hz 14 73 Hz < fV < 78 Hz 13

78 Hz < fV 15

63 Hz < fV < 68 Hz 18 68 Hz < fV < 73 Hz 19 73 Hz < fV < 78 Hz 20

78 Hz < fV 21

Attention :

1. Make it the mode 16 by the first HSYNC, the VSYNC distinction in the time beyond 640 line when you

recognize it with the mode 16.

2. When resolution beyond 1024 x 768 is inputted, resolution is lowered with Down scaling to 1024 x 768, and

indicated, and OSD should indicate OUT of Range.

9.3 User Control

9.3.1 Related ports of I317

Port Pin No. I/O Signal name Function Remarks

MFB1 112 1 RESET RESET switch input The set value is

returned to the initial value

MFB5 107 1 EXIT EXIT switch input Withdraw from

OSD

MFB10 124 1 DOWN switch input ( ) key

MFB4 109 1 UP switch input ( ) key

MFB11 123 1 - switch input ( ) key

MFB3 110 1 + switch input ( ) key MFB2 111 1 PROCEED PROCEED switch input Functional

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EC-150ATA

9.3.2 Functions Control is effected for the push-switches to be used when the user changes the parameters, in order to modify the respective setting values. Whether the switch has been pressed is identified with the switch input level that is turned L. Each switch input port is pulled up at outside of ASIC. Each parameter is stored in the EEPROM, the contents of which are updated as required.

9.4 Control of definition converter LSI I317

9.4.1 Ports related to control

Pin No. I/O Signal name Function

101 I IRQ gmZan1 interrupt signal 103 O HCLK gmZan1 serial clock

99 I/O HDATA gmZan1 serial data 98 O HFS gmZan1 serial select

9.4.2 Functions Major function of I317 are as follows: (1) Expansion of the display screen. (2) Timing control for various signal types. (3) Power-supply sequence (LCD panel).

9.5 I2C bus control

9.5.1 Related ports of I201

Port Pin No. I/O Signal name Function P3.3 15 I IICCLK IIC bus clock

P3.4 16 I/O IICDATA IIC bus data

9.5.2 I2C-controlled functions The following functional controls are effected by I2C. (1) Control of EEPROM I305f for parameter setting. (2) Control of audio preamplifier.

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EC-150ATA

9.6 Power ON sequence When the POWER switch is pressed, the POWER OFF signal is turned H. When this H potential is detected, the CPU begins to establish the respective power supplies according to the sequence shown below.

POWER

PPWR

DOTCLK

USBSW

UCPB IAS

LVC C

LED

DATA

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EC-150ATA

9.7 Power OFF sequence When the POWER switch is pressed while the power supply is ON, the POWER ON signal is turned H. When

this H potential is detected, the CPU begins to turn off the respective power supplies according to the sequence shown below.

POWER

PPWR

DOTCLK

USBSW

UCPB IAS

LVC C

LED

DATA

Page 7Circuit Description

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9.8 List of CPU Pin Assignments

)

Port Pin No. Signal Name Initial Setting Function Remark

EC-150ATA

~ P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.9

P3.0

~ P3.1 P3.2 P3.3 P3.4 P3.5 P3.6 P3.7

~ P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7

~ P0.7 P0.6 P0.5 P0.4 P0.3 P0.2 P0.1 P0.0

D4(LEDAMBER

NC ~ ~ HDATA0 ~ gmZAN1 4bit interface data HDATA1 ~ gmZAN1 4bit interface data HDATA2 ~ gmZAN1 4bit interface data HDATA3 ~ gmZAN1 4bit interface data

HCLK ~

HFS ~ gmZAN1 data enable

VOL_OUT H reserved

PWM ~ Pulse width modulation

RST L Reset CPU Active H

RXD H Receive data

NC ~ ~

TXD H Transmit data

IRQ ~ gmZAN1 interrupt signal SCL ~ IIC Bus Clock

SDA H IIC Bus Data

DDC-GND L Detect Dsub cable plug-in Active L

P3.6 H External Memory Write Enable P3.7 H External Memory Read Enable

XTAL2 ~ Crystal signal out

XTAL ~ Crystal signal in

GND ~ ~

NC ~ ~

A8 ~ High-order address byte

A9 ~ High-order address byte

A10 ~ High-order address byte A11 ~ High-order address byte A12 ~ High-order address byte A13 ~ High-order address byte A14 ~ High-order address byte A15 ~ High-order address byte

PSEN# H Program store enable

ALE ~ Address latch enable

NC ~ ~

EA# H External Access Enable

D7(USB_ON) H USB HUB power Enable

D6(Uc-PBIAS) H Inverter power Enable

D5(LEDGRN) H LED Green ON

L LED AMBER ON D3 ~ reserved D2 ~ reserved

D1(MUTE) L Audio MUTE Enable

D0(AU_SUSP) H Audio SUSP Enable

VCC ~ VCC

mZAN1 4bit interface Clock

Page 8 Circuit Description

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EC-150ATA

10. Inverter Protective curcuit for back light and power source circuity (Circuit diagram MAIN PWB 8/10)

This unit operates on an output voltage of 12V from AC adapter. When an AC adapter with an output voltahe over 12V higher is connected, the control signal from I101 is forcibly connected to the LOW level through D101 (RLZ18B), Q101 (SST33904), and R101, R102. In order to protect the inverter for back light. By this treatment, oscillation is suspended in the inverter circuit. It must be noted that the back light it unlit as a result of the stoppage of inverter oscillation.

11. USB circuit

11.1 3.3V cutoff circuit for USB identification (Circuit diagram USB PWB 1/4) Q905 is a composite transistor where one PNP and one NPN are incorporated in a package. A signal at pin 1 (5V) of USB (B) connector CN901 passes through R975 (33 ohm) and enters pin 4 (TR2B) of Q905. Pin 4 is an NPN type base of the internal transistor in Q905. the collector (pin 3) is connected to a 3.3V circuit through R974 (10 ohm) and R972 (10 ohm) connected in series. The emitter (pin 2) is connected to GND. For the PNP transistor, on the other hand, a voltage-divided power from the 3.3V circuit is fed to the base (pin 5) and the collector (pin 1) is connected to UD+ of the USB data line through R901 (1.5 ohm). The emitter (pin 6) is connected to the 3.3V circuit. When the USB connector is connected and voltage at pin 1 of CN901 attains 5V, the NPN transistor of Q905 is turned ON. This also turns on the PNP transistor whose base is connected to the collector of the NPN transistor through R974 (10 ohm). As a result, the DC+ power supply is fed from the 3.3V circuit that is connected to the emitter of the PNP transistor, through R901 (1.5 ohm) that is connected to the collector. When the USB connector is pulled out the host computer is turned off, the base voltage of the NPN transistor at Q905 is turned to be at the GND level, and therefore the transistor is turned off. As a result, a voltage of 3.3V is applied to the base of the PNP transistor and this causes the PNP transistor to be turned off also. Finally, a voltage supply of 3.3V is suspended toward UD+. IC905 is a step-down type series regulator that generates 3.3V from a 5.2V source.

11.2 USB hub control circuit (Circuit diagram USB PWB 2/4) IC909 is a reset IC, and IC910 is a USB hub control IC made by NEC. When the monitor power circuit is turned on, a 3.3V power is fed to IC909. Upon the detection of about 2.75V, IC909 begins to generate a reset signal of 150msec. IC910 enables communication with a higher port when UD+ and UD- from the USB connector (Circuit diagram USB PWB 1/4) are applied to pin 7 and pin 8, respectively. Pin 9, 10, 12, 13, 14, 15, 18 and 19 are connected to the USB connector (Circuit diagran USB PWB 3/4) of the lower port. They function as a communication interface between lower and higher ports. If an overcurrent is generated in the lower port, it is transferred to the higher port. X901 is a crystal oscillator that supplies a 4MHz clock signal to the USB hub control IC (IC910).

11.3 Lower port circuit (Circuit diagram USB PWB 3/4) CN904 and 905 are the USB lower-port connector. The 5.2V output from the DC/DC converter passes through the poly-switches of F901, 902, 903 and 904, and is led to the power supply pins (pin 1 and pin 5 of each connector) of the USB lower-port connector. An overcurrent signal is given from the poly-switch - USB lower-port connector line to IC910 (Circuit diagram overcurrent has been generated in the lower port.

11.4 DC/DC converter circuit (Circuit diagram USB PWB 4/4) IC906 is a DC/DC converter IC, D903 is a rectifier diode, and L910 is a smoothing coil. Pin 5 (ON / OFF) of IC906 is connected to pin 5 (S/SW) of the USBDC connector CN903 through transistors Q901 and Q902. When the potential at pin 5 of CN903 is maintained at the GND level, pin 5 of IC906 is aldo at the gnd level and IC906 stops generation of its output. When pin 5 of CN903 is at the high level, pin 5 of IC906 then stays in the OPEN state, this causing IC906 to generate a 5.2V output.

Page 9Circuit Description

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EC-150ATA

Table of Contents

1. No display of screen (Screen is black, color of LED is amber) ----------------------------------------------------- 1

2. Nothing displays on screen (Screen is black, color of LED is green) ---------------------------------------------- 2

3. Checking the back light unit --------------------------------------------------------------------------------------------- 5

4. Abnormal screen ---------------------------------------------------------------------------------------------------------- 6

6. Abnormal Auto adjustment ---------------------------------------------------------------------------------------------- 9

7. Abnormal plug and play operation ------------------------------------------------------------------------------------ 10

7.1 Abnormal DDC1----------------------------------------------------------------------------------------------------- 10

7.2 Abnormal DDC2----------------------------------------------------------------------------------------------------- 10

8. Checking the interface circuit of sync signal -------------------------------------------------------------------------11

8.1 Checking the control circuit of horizontal sync pulse ----------------------------------------------------------11

8.2 Checking the control circuit of vertical sync pulse-------------------------------------------------------------- 11

9. Checking the resolution change IC movement -----------------------------------------------------------------------12

10. No power on -------------------------------------------------------------------------------------------------------------- 13

11. Checking the DC/DC converter circuit --------------------------------------------------------------------------------14

12. Checking the operation of CPU ---------------------------------------------------------------------------------------- 15

13. Checking the audio circuit ---------------------------------------------------------------------------------------------- 16

14. Check the USB hub circuit (NEC Version) ---------------------------------------------------------------------------18

14.1 Hub isnt recognize ------------------------------------------------------------------------------------------------ 18

14.2 Connection apparatus isnt recongnize --------------------------------------------------------------------------19

14.3 Connection apparatus doesnt work -----------------------------------------------------------------------------20

14.4 Check the USB IC ------------------------------------------------------------------------------------------------- 21

14.5 Check the power supply -------------------------------------------------------------------------------------------23

15. Check the USB hub circuit (Atmel Version) -------------------------------------------------------------------------25

15.1 Hub isnt recognize ------------------------------------------------------------------------------------------------ 25

15.2 Connection apparatus isnt recongnize --------------------------------------------------------------------------26

15.3 Connection apparatus doesnt work -----------------------------------------------------------------------------27

15.4 Check the USB IC ------------------------------------------------------------------------------------------------- 28

15.5 Check the power supply -------------------------------------------------------------------------------------------29

Trouble Shooting Index

Page 13

1. No display of screen (Screen is black, color of LED is amber)

Does OSM display when you push

PROCEED button.

Yes

Check if the sync signal from Computer

is output and if the video cable is

connected normally.

Preceed "No OSM display"section.

Proceed "Checking the resolution change

IC movement" section.

Input the sync signal of computer, or

change the cable.

When a signal isn't

being inputted, it is

indicated with "VIDEO

INPUT". It is indicated

with "OUT OF RANGE"

at the time of the

frequency that it can't be

distinguished.

EC-150ATA

Trouble Shooting Page 1

Page 14

2. Nothing displays on screen (Screen is black, color of LED is green)

Is backlight lit?

NG Refer "Checking the backlight unit" section

EC-150ATA

Does computer output RGB video signals?

Check OSM menu is displayed on screen

when you push the "PROCEED" key.

Proceed "Abnormal screen" section.

Check the video cable for failure. Check the host for

output signal with all black only.

1) Change pattern of video signal output on the host.

2) Reconnect the video cable.

3) Change the video cable.

Check if the LCD video signal cable is connected between the MAIN PWB and LCD module.

Failure Point

The Cable is disconnected.

Page 2 Trouble Shooting

Page 15

Continue

Check the 3.3 V power are supplied on I315 pin 2.

Check if the voltage on I315 pin3 that

is high level DC at 5V.

Failure point

EC-150ATA

Failure point

1) Printed wire broke between I314 and I315

2) I314 failure.

I315 Failure

Is a dot clock being outputted under the

condition that a LCD module is connected to

Check the H-sync pulse of negative polarity is

output on P304 pin 38 at TTL level.

Check the V-sync of negative polarity are

P304 pin 44?

output on P304 pin 40.

Failure point

1) I317 failure

2) Printed wire broke between I317 and P304 pin 44.

Failure point

1) I317 failure

2) Printed wire broke between I317 and P304 pin 38.

Failure point

1) I317 failure

2) Printed wire broke between I317 and P304 pin 40.

Trouble Shooting Page 3

Page 16

Continue

Check the data enable of positive polarity are output on P304 pin 42.

1) I317 failure.

2) Printed wire broke between I317 and P304 pin 42.

EC-150ATA

Failure point

Check the data signal output on P304 R, G, B

1) The cable broke between P304 and LCD module.

2) LCD module failure.

data pin.

Failure point

1) I317 failure.

2) Printed wire broke between I317 and P304 data line

Page 4 Trouble Shooting

Page 17

3. Checking the back light unit

Is +12V supplied to I316 pin 1 and pin 2, 3.

Is +12V supplied to P306 pin 3, 4 to inverter

Are connected AC adapters normal goods?

PWB?

EC-150ATA

Failure point

An AC adapter is changed to the normal goods.

Check the Uc-PBIAS signal of the rectangle input I313 pin 3 at TTL high level

Check the PWM signal of the input from I302 pin 9 is a PWM signal.

Failure point

Inverter cable disconnection.

Is a "H" level being output in the TTL level from I307 pin 16

Or, is Uc-PBIAS signal of the rectangle being output?

Failure point

Printed wire broke between

I307 pin 16 and I316 pin 3

Failure point

1) Printed wire broke between I302 pin 9 and I313 pin 5.

2) I104 failure.

Failure point

Printed wire broke between

P307 pin 1 and I316 pin 1, 2 & 3

Failure point

1) Inverter cable disconnection.

2) Inverter of LCD module failure.

Trouble Shooting Page 5

Page 18

4. Abnormal screen

EC-150ATA

Check the R, G, B video signal from computer input on

Check the R, G, B input signals on I317 pin 95, 91, 87,

Is the pulse of the TTL level being output to P304, P305

Check the negative horizontal sync pulse output to P304

D-Sub R, G, B connector.

respectively that their level is 0.7Vp-p maximum.

from the data line of I317?

pin 38 from I317 pin 74 at TTL level.

1) No R, G and B video signal output from host computer. Check computer

2) Video signal cable disconnection.

In the case of the Red signal. (A Green and Blue signal is the same path, too.)

1) Printed wire broke between D-Sub(R) and I317 pin 95.

2) R339 short.

3) C330 open.

4) R337 open.

1) Printed wire broke between I317 data line and P305, P304

2) I317 failure.

Failure point

Check the negative vertical sync pulse output to P304 pin

40 from I317 pin 73 at TTL level.

Check the positive DE pulse output to P304 pin 42 from

I317 pin 43 at TTL level.

Check the SHFCLK OUTPUT to P304 pin 44 from I317

pin 44 at TTL level.

Process "Checking the resolution change IC movement"

section.

1) Printed wire broke between I317 pin 74 and P304 pin 38.

2) R314 open

3) C355 short

1) Printed wire broke between I317 pin 73 and P304 pin 40.

2) R315 open

3) C356 short

1) Printed wire broke between I317 pin 43 and P304 pin 42.

2) R313 open

3) C357 short

1) Printed wire broke between I317 pin 44 and P304 pin 44.

2) FB310 open

3) FB311 open

4) C347 short

5) C378 short

Failure point

Page 6 Trouble Shooting

Page 19

5. NO OSM display

EC-150ATA

Check the output of 5Vp-p pulse from I310 pin 16, 17, 18, 19 when press PROCEED key.

Check the input of IIC signal from I310 pin7 and pin 8.

Check the input of 5Vp-p pulse from I317 pin 118, 119, 120 are same as I310 pin 17, 18, 19, or check

Check the output of IIC Interface from I201 pin 15, 16.

1) Printed wire broke between I310 pin 7 and I201 pin 16.

2) Printed wire broke between I310 pin 8 and I201 pin 15.

input of 5Vp-p pulse from I317 pin 122 is same as I310 pin 16.

1) Printed wire broke between I310 pin 16 and I317 pin 122.

2) Printed wire broke between I310 pin 17 and I317 pin 118.

3) Printed wire broke between I310 pin 18 and I317 pin 119.

4) Printed wire broke between I310 pin 19 and I317 pin 120.

Proceed "Checking the operation of CPU" section.

Failure point

Trouble Shooting Page 7

Page 20

Proceed "Checking the resolution change IC movement" section.

Check the +5V is supply on I310 pin 4, 13.

EC-150ATA

Check the input of the dot clock on I310 pin 2 at TTL level.

NG Check the output of the dot clock on I317 pin 117 at TTL level.

Check positive horizontal sync signal on I310 pin 5

at TTL level.

1) C314 or C315 short.

2) I314 failure

3) Disconnection between I314 pin 2 and I310 pin 4, 13 may have failed.

Proceed "Checking the resolution change IC

1) Printed wire broke between I317 pin 117 and I310 pin 2.

Check the positive horizontal sync signal on I317 pin 115 at TTL level.

Proceed "Checking the resolution change IC

1) Printed wire broke between I317 pin 115 and I310 pin 5.

2) R443 open

Failure point

movement" Section.

Failure point

movement" Section.

Failure point

Check negative vertical sync signal on I310 pin 14 at TTL level.

NG Check negative vertical sync signal on I317 pin 116 at TTL level.

Failure point

I310 failure.

1) Printed wire broke between I317 pin 116 and I310 pin 14.

2) R309 open

Proceed "Checking the resolution change IC

movement" Section.

Failure point

Page 8 Trouble Shooting

Page 21

Check the input of 3.3Vp-p pulse from I317 pin 98,103, 99, 102, 104, 105.

Failure point

1) Printed wire broke between I317 pin 99 and I302 pin2.

2) Printed wire broke between I317 pin 102 and I302 pin3.

3) Printed wire broke between I317 pin 104 and I302 pin4.

4) Printed wire broke between I317 pin 105 and I302 pin5.

5) Printed wire broke between I317 pin 103 and I302 pin6.

6) Printed wire broke between I317 pin 98 and I302 pin7.

Proceed "Checking the resolution change IC movement" section.

EC-150ATA

Trouble Shooting Page 9

Page 22

7. Abnormal plug and play operation

7.1 Abnormal DDC1

Confirm the output of serial data on I311 pin 7 synchronize VCLK at TTL level.

EC-150ATA

1) The host machine isn't communicating in DDC1 mode.

2) The video cable may have failed or may not to have connections for DDC.

3) Between I311 pin 5 and P303 pin 12 may have failed.

4) R336 open.

5) Cable failure.

7.2 Abnormal DDC2

Confirm the output of serial data on I311 pin 6 synchronize SCLK at TTL level.

1) This mode may be in DDC2B If you change the mode of DDC1, turn off the power switch of the host and the monitor and power again.

2) I311 failure.

Failure point

1) The host machine isn't communicating in DDC2 mode.

2) The video cable may have failed or may not to have connections for DDC.

3) Between I311 pin 6 and P303 pin 15 may have failed.

4) R335 open.

5) Cable failure.

Failure point

I311 failure.

Page 10 Trouble Shooting

Page 23

8. Checking the interface circuit of sync signal

8.1 Checking the control circuit of horizontal sync pulse

EC-150ATA

Check the horizontal sync signal on I317

Process "Checking the resolution change IC

pin 150 TTL level.

movement" section.

1) Video cable may have failed.

2) Printed wire broke between P303 pin 13 and I317 pin 150

3) FB306, R350 open

8.2 Checking the control circuit of vertical sync pulse

Failure point

Check the vertical sync signal on I317 pin

Process "Checking the resolution change IC

148 TTL level.

movement" section.

Failure point

1) Video cable may have failed.

2) Printed wire broke between P303 pin 14 and I317 pin 148

3) FB307, R351 open

Trouble Shooting Page 11

Page 24

9. Checking the resolution change IC movement

EC-150ATA

Is there +3.3V supply on I317 pin 77, 79, 84, 96, 92, 88, 8, 129, 136, 139, 137, 143, 11, 21,

Is 50MHz clock input to I317 pin 141

Is +5.0V supplied to I317 pin 100 at

at TTL level?

High level?

Failure point

I317 failure

Print wire broke between X302 pin 5

58, 108, 149, 12, 33, 40 and 65.

Proceed "Checking the DC/DC converter circuit" section.

Is 50MHz clock output from X302

pin 5 at TTL level?

OK NG

and I317 pin 141.

Check the output of 5.0V "H" pulse

from I301 pin 1.

NG Is 5.0V supplied to I301 pin 2?

Is +3.3V supplied to X302 pin 8?

Failure point

Failure point X302 failure

Print wire broke between and X302

pin 8 and power supply.

Failure point

1) I314 failure

2) L306 open

Failure point

Print wire broke between I301 pin 1

and I317 pin 100.

Failure point

I301 failure

Page 12 Trouble Shooting

Page 25

10. No power on

EC-150ATA

Check the +12V power is supplied

from AC adapter.

Is LED turned on in amber

momentarily when a power button is

Check if TTL "H" level is input to

Proceed "Checking the operation of

pushed?

Q305-base.

D323, Q304, R393, R394 circuit

CPU".

Failure point

AC adapter failure.

Failure point Fuse failure.

Failure point

Trouble Shooting Page 13

Page 26

11. Checking the DC/DC converter circuit

EC-150ATA

Check if the 5V is output from I314

Check the output of 3.3V line voltage

pin 2.

from I315 pin 2.

Check if TTL "H" is output from

Q305-base.

NG Q304, D323, R393, R394 circuit.

Check if the 12V is output from I316

pin 5,6,7,8.

NG I316 failure.

Check the input of 12V to the I314

pin1.

Is the output FB321 being inputted

Printed wire broke between I315 pin 2 and IC 317 power supply pin.

to I315 pin 3?

Printed wire broke between I315

Failure point

I315 failure

Failure point

pin 3 and output of FB321.

Page 14 Trouble Shooting

Page 27

12. Checking the operation of CPU

Is there +5.0V supply on I302 pin 44

OKNGFailure point

Printed wire broke between output of FB319 and I302 power supply pin.

Is 20MHz clock input to I302 pin 20

and 21 at TTL level?

OKNGFailure point

X301 failure.

Check the input of 5V "H" pulse from

I302 pin 10 are same as I307 pin 1.

(350 msec Typ)

OKNGFailure point

1) Printed wire broke between I302 pin 10 and I307 pin 1.

2) I208 failure.

I302 failure.

EC-150ATA

Trouble Shooting Page 15

Page 28

13. Checking the audio circuit

Is a cable with the host PC

connected?

EC-150ATA

Aren't the setups of the host PC a

minimum and off?

Is correct output waveform being

inputted from JK011 pin 2, 3 of the

Is the waveform which is the same

as JK011 being inputted to I006 pin

Is output wavefrom being outputted

The setup of the host PC is changed.

host PC?

2, 29?

1) Printed wire broke between JK011 pin 2, 3 and I006 pin 2, 29.

2) R047, R048 open.

3) R049, R050 short.

4) C013, C014 open.

in I006 pin 9, 22?

Failure point

Audio cable disconntction.

Failure point

Audio cable disconntction.

Failure point

Is 9V supplied to I006 pin 10?

Failure point

I006 failure

Is 12V supplied to I008 pin 2?

Proceed section 11 "Checking the

DC/DC converter circuit".

Page 16 Trouble Shooting

Page 29

EC-150ATA

Is the output waveform which is the

same as I006 pin 9, 22 being

inputted to I007 pin 1,9?

1) Printed wire broke between I006 pin 9, 22 and I007 pin 1, 9.

Is the input waveform amplified by

Is the output waveform of I007 pin

4,6 being inputted to P012 pin 1, 3?

Is the output waveform of P012 pin

1,3 being inputted to p002 pin 1, 3 of

2) C015, C018 open.

3) C015, C018 failure.

4) R051, R052 open.

5) R051, R052 failure.

I007 being outputted?

jack PWB?

Failure point

I007 failure.

Failure point

Is the "H" signal of the TTL level

being inputted to I008 pin 1?

Is the "H" signal of the TTL level

being outputted from I208 pin 16?

Proceed section 12 "Checking the

1) C039 short.

2) I008 failure.

Failure point

1) Printed wire broke between I007 pin 4, 6 and P012 pin 1, 3.

2) C016, C017 open.

3) C016, C017 failure.

Printed wire broke between I208 pin

16 and I008 pin 1.

Failure point

operation of CPU".

Failure point

1) Disconnection of MAIN PWB and jack PWB.

2) JK001 of Jack PWB failure.

3) Speaker cable disconnection.

4) Speaker failure.

Failure point

Disconnection of MAIN PWB and

Jack PWB.

Trouble Shooting Page 17

Page 30

14. Check the USB hub circuit (NEC Version)

14.1 Hub isn’t recognize

Is a cable with the host PC connected

EC-150ATA

Is a USB cable connected with the monitor?

Is 0.6V supplied to Q905 pin 4?

Is 3.3V supplied to Q905 pin 6?

Failure point

USB cable disconnection

Failure point

USB cable disconnection

Doesn't R975 open

Doesn't R969 open

Failure point

R975 open

Is 3.3V supplied to Q905 pin 1?

Doesn't D909 short with GND?

Proceed "Check the USB IC" section.

proceed "Check the

power supply" section.

Failure point Q905 failure

Failure point

D909 short

Doesn't Z903 short

Is 5V + 5% supplied to

CN901 pin 1?

Printed wire breaks

between CN901 pin 1

and Q905 pin 4

Failure point

R969 open

Failure point

Z903

Failure point

USB cable failure

Page 18 Trouble Shooting

Page 31

14.2 Connection apparatus isn’t recongnize

Is it aware of the USB hub in the host PC?

EC-150ATA

Is apparatus connected to the down stream port ?

Is 5.2V supplied to CN904 pin1 ,5 ?

Doesn't D904, D905 short with

The un-connection of the down stream port cable.

Doesn't R959, R960, R961

and R962 open ?

Failure point

R959, R960, R961

and R962 open

Is resistance on both ends of

F901, F902 less than 1 Ohm ?

Doesn't D910, D911 short with

GND?

Proceed "Check the power supply" section.

Proceed "HUB isn't recognize" section

Failure point

GND ?

Failure point

D904, D905 short

Failure point

F901, F902 failure.

Failure point

D910, D911 short.

Is 3.3V supplied to IC910

pin 40, 41?

Faulty operation of the over-current protection function.

Failure point

Proceed "Check the USB IC " section.

Trouble Shooting Page 19

Page 32

14.3 Connection apparatus doesn’t work

Is it aware of the USB hub in the host PC ?

EC-150ATA

Is a host PC aware of the peripheral which doesn't work ?

Is the program which is characteristic of the machine

unnecessary to make it work ?

Proceed section 14.1 "HUB isn't recognize".

Proceed section 14.2

"Connection apparatus isn't recognize ".

Is there a precaution of " it doesn't sometimes move via the

hub. " in the manual of the peripheral which doesn't work ?

A machine movement program hasn't been installed.

The HUB un-correspondence of connection peripheral.

Failure point

Is the pin of CN904 (pin 2,3 or pin 6,7) with peripheral is connect with rise_time and fall_time less than 20 nsec ?

In the pin of CN904 (pin 2,3 or pin 6,7 ) which

peripheral is connect with rise_time and fall_time

Proceed section 14.4 "Check the USB IC"

between 100nsec to 300 nsec?

Is the resistance value of R960, R961,

R962 20 Ohm +/-5%?

R959, R960, R961, R962 short.

Failure point

Page 20 Trouble Shooting

Page 33

14.4 Check the USB IC

Is 3.3V supplied to IC910 pin 24, 29,

38 and 39?

Is the reset signal of IC910

pin 6 a Hi

h level (More than 2.3V)?

Does it have the output of the Hi

Is 3.3V supplied to IC909 pin 7?

EC-150ATA

Proceed section 14.5 "Check the power supply ".

h level (More than 2.3V) from IC909 pin 6?

Failure point Printed wire breaks between IC909 pin 6 and IC910 pin 6.

Doesn't C917 short with GND?

Failure point C917 failure

Does it have the output of the Low

level (Less than 0.8V) from IC910

pin 2, 31?

Does it have the output of the Hi

level (More than 2.0V) from IC910

pin 37?

Proceed section

14.5 "Check the power supply".

Is there an input signal of 1.5V in

Failure point IC909 short.

Doesn't R949, R950 open?

IC909 pin 2?

Doesn't R916 short?

Is the resistance value if R914

Failure point IC910 failure

Proceed section 14.5 "Check the power

supply"

Failure point

R916 failure

12k ohm +/- 5%?

Failure point

R914 short

Failure point

R949, R950

open

Trouble Shooting Page 21

Page 34

Continuation

Does X901 oscillate (4MHz)?

EC-150ATA

Isn't IC910 pin 7 fixed on the High

level (More than 2.0V)? And, isn't

IC910 pin 8 fixed on the Low level

(Less than 0.8V)?

Does it have the output of the

High level (More than 2.0V) from

IC910 pin 40, 41?

Does the output of X901 satisfy a Threshold Level

(High: More than 2.3V, Low: Less than 0.8V)?

Failure point

IC910 failure

Failure point

Faulty operation of the host PC.

Failure point

Faulty operation of the over-current protection

Failure point

X901 failure

function.

Failure point

IC910 failure.

Page 22 Trouble Shooting

Page 35

14.5 Check the power supply

Check the 12V power is supplied to CN903 pin 2,6

EC-150ATA

Is the USB DC cable connected ?

Check the 12V

power is supplied

to IC906 pin 1.

Check the 12V

power is supplied

to CN905 pin 5

IC906 pin 5 is not a GND level ?

Failure point

USB DC cable disconnection.

Printed wire breaks between CN903 pin

2,3 and IC906 pin 1.

Failure point

USB DC cable disconnection.

Doesn't C929 open?

Failure point

A USB DC cable isn't

connected .

Failure point

Is Q901 pin 5 a GND level.

Doesn't the resistance value of

R909 short with GND?

Failure point

C929 failure.

Is there Q902-base

more than 0.6V?

Failure point

R941 open

Failure point

R909 failure.

Failure point Q901 failure.

Failure point

Q902 failure.

Trouble Shooting Page 23

Page 36

Is 5.2V being outputted from L910 pin 7?

EC-150ATA

Is 5.2V being

outputted from

L911 pin 2?

Is the IC906 output that it had rectification

done by L910 pin 3 being inputted?

Failure Point

L910 failure

Doesn't C911

short with GND?

Doesn't C910

short with GND?

Doesn't C912

short with GND?

Is R913 open?

Failure Point

C911 failure

Failure Point

C910 failure

Failure Point

C912 failure

Failure Point

R913 failure

Doesn't R910 open?

Doesn't D903

open?

Doesn't D903

short with GND?

Isn't output from

IC906 pin 2 fixed

on 12V and the

GND level?

Printed wire breaks between IC906 pin 2 and

L910 pin 3.

Failure Point

L913 open

Failure Point

D903 open

Failure Point

D903 failure

Failure Point IC906 failure

Printed wire

breaks between

L910 pin 7 and

L911 pin 1.

Printed wire

breaks 5.2V.

Page 24 Trouble Shooting

Page 37

15. Check the USB hub circuit (Atmel Version)

15.1 Hub isn’t recognize

Is a cable with the host PC connected

EC-150ATA

Is a USB cable connected with the monitor?

Is a 5V supplied to I201 Pin1?

Is a 3.3V supplied to I201 Pin3?

Failure point

I201

Failure point

USB cable disconnection

Failure point

USB cable disconnection

Doesn't Q203 open

Doesn't R232 open

Failure point

Q203

Failure point

R232 open

Doesn't 3.3V to J202 pin2

Doesn't R201 open

Failure point

R201

Printed wire breaks

between R201 and J202

" Proceed section 15.4 Check the USB IC "

Doesn't R235 open

Doesn't Q204 open

Doesn't R233 open

Doesn't I203 open

Proceed section 15.5

"Check the power supply"

Failure point

R235

Failure point

Q204

Failure point

R233 open

Failure point

I203

Trouble Shooting Page 25

Page 38

15.2 Connection apparatus isn’t recongnize

Is it aware of the USB hub in the host PC?

EC-150ATA

Is apparatus connected to the down stream port ?

Is 5V +/- 5% supplied to J204 pin1 ,5 ?

Doesn't L209, L211 open ?

Failure point

L209, L211 open.

The un-connection of the down stream port cable.

Doesn't C215, C216, C217,

C218 short with GND ?

Is resistance on both ends of

R225, R206 less than 1 Ohm ?

Is 5V supplied to IC201 pin 9 ?

Proceed section 15.5 " Check the power supply "

Proceed section 15.1 "HUB isn't recognize"

Failure point

C215,C216,C217,C218 short

Failure point

R225, R206 failure.

Faulty operation of the over-current protection function .

Failure point

Proceed section 15.4 " Check the USB IC ".

Page 26 Trouble Shooting

Page 39

15.3 Connection apparatus doesn’t work

Is it aware of the USB hub in the host PC ?

EC-150ATA

Is a host PC aware of the peripheral which doesn't work ?

Is the program which is characteristic of the machine

unnecessary to make it work ?

Proceed section 15.1 "HUB isn't recognize".

Proceed section 15.2

" Connection apparatus isn't recognize ".

Is there a precaution of " it doesn't sometimes move via the

hub. " in the manual of the peripheral which doesn't work ?

A machine movement program hasn't been installed.

The HUB urn-correspondence of connection

Failure point

peripheral.

Is the pin of J204 (pin 2,3 or pin 6,7) with peripheral is connect

with rise_time and fall_time less than 20 nsec ?

In the pin of J204 (pin 2,3 or pin 6,7 ) which peripheral

is connect with rise_time and fall_time between

100nsec to 300 nsec?

Proceed section 15.4 "Check the USB IC"

Is the resistance value of

R213,R214,R215,R216 22 Ohm +/-5%?

R213,R214,R215,R216 open

Failure point

Trouble Shooting Page 27

Page 40

15.4 Check the USB IC

Is 5V supplied to I201 pin 1 ?

Does it have the output of the

High level (More than 4.75V )

from I201 pin 9,10,12

EC-150ATA

Proceed section 15.5 " Check the power supply ".

Does X201 oscillate (6 MHz) ?

Isn't I201 pin 15 fixed on the

High level ( more than 2.0V ) ?

and isn't pin14 fixed on the

Low level ( less than 0.8v ) ?

Faulty operation of the host PC.

Does it have the output of the High Level

( more than 4.75V ) from I201 Pin 9.

Does R234 open ?

Does the output of X201 satisfy a threshold level

( High:more than 4.75V,Low:less than 0.8V) ?

Failure point

I201 failure

Failure point

X901 failure

Does Q205 short ?

Does Q201 short ?

Failure point

Faulty operation of the over current protection function.

Failure point

I201 failure

Failure point

R234 failure

Failure point Q205 failure

Failure point Q201 failure

Page 28 Trouble Shooting

Page 41

15.5 Check the power supply

Check the 12V power is supplied to J201 pin 2,6

EC-150ATA

Is the USB DC cable connected ?

Check the 12V

power is supplied

to I202 pin 1.

USB DC cable disconnection.

Printed wire breaks between J201 pin 2,6

Check the 5V

power is supplied

to J201 pin 5

USB DC cable disconnection.

I202 pin 5 is not a GND level ?

Is Q202 collector a GND level

Is the 5V being output

from L201 pin 2 ?

Failure point

I202 failure

Failure point

and I202 pin 1.

Failure point

A USB DC cable isn't connected .

Doesn't Q202 open

Failure point Q202 failure

Failure point

Printed wire breaks between Q202 pin 1

and I202 pin 5.

Is the 5V being

output from L214

pin 2 ?

Doesn't C209,C220,C222

short with GND ?

Printed wire breaks 5V

Printed wire breaks

between L201 pin 2 and

Is the I202 output that it had

rectification done by L201 pin

1 being inputted?

Failure point

L201 failure

L214 Pin 1 .

Failure point

C209, C220, C222

Doesn't D205 open?

Doesn't D205 short

with GND?

Isn't output from I202

pin 2 fixed on 12V and

the GND level?

Printed wire breaks between I202 pin 2

and L201 pin 1.

Failure point

D205 open.

Failure point

D205 failure.

Failure point

I202 failure.

Trouble Shooting Page 29

Page 42

EC-150ATA

1. Recommended Parts List

Note: 1. The components identified by   mark are critical for X-ray safety. Replace these with

only the same parts specified.

2. There is only OTP IC at the model beginning (FPR stage or before). When it put in mass production and there must be Mask coming out. If you have spart parts need, please use BOM to get the last release part number and related information.

No. Location Part Number Description

1 INVA 6716008900 INVERTER DC-AC 12V DA00812600L

2 PWR 6716006704 ADAPTER A-D 12V/4A GRAY GL5B

3 V002 6712450070 FFC 45P 0.5 2896 (ATYPE) 73/223

4 V003 6712300060 FFC 30P 0.5 2896 (ATYPE) 35/253

5 D318 6412001738 DIODE RLS4148 LL-34 SMD ROHM

6 D319 6414056038 DIODE ZNR RLZ TE-11 5.6B LL-34

7 D321 6413045008 DIODE SCHOTTKY BYS10-45-TR SMD

8 D323 6414180048 DIODE ZNR RLZ TE-11 18B LL-34

9 F301 6851105092 FUSE SLOW TR5-T CG90L=4.3+-0.3

10 I301 6444006810 IC MCP130-450DI TO92 MICROCHIP

11 I302 6448015548 IC P87C51RD+IA 44P PLCC PHILIPS

12 I303 6446002506 IC 74HCT04 14P SMD

13 I305 6448016128 IC 24LC16B/P 8P DIP MICROCHIP

14 I307 6446006018 IC 74HCT373 20P 300mil SOP PHI

15 I308 6446002406 IC 74HCT08 14P SMD

16 I310 6444007408 IC MTV130P-30 16P SOP MYSON

17 I311 6448007420 IC AT24C21-10PC-2.5 8P PDIP

18 I312 6442027408 IC Si9424DY 8P SOP

19 I313 6442001908 IC LM358DT 8P SOP ST

20 I314 6442024106 IC LM2596S-5.0 5P TO263(S) NS

21 I315 6442023316 IC RC1587M33 3P TO263 SMD

22 I316 6442027308 IC Si4431DY 8P SOP

23 I317 6444007308 IC gmZAN1 160P PQFP GENESIS

24 L307 6111307130 COIL CHOKE 3uH K DRWW6x8 G3

Recommended Spare Parts List Page 1

Page 43

No. Location Part Number Description

25 P304 6610450010 PLUG 45P 0.5 IL-FHR-45S-HF JAE

26 P305 6610300030 PLUG 30P 0.5 IL-FHR-30S-HF JAE

27 Q301 Q302 6422003508 TR NPN PMBT2222A SOT-23 PHILIPS

28 Q305 6422007308 TR NPN SST3904 T116 SOT-23 SMD

29 D600 6418004401 LED LTL-36EDIP 1(Y)3(G) LITEON

30 S601 6853004413 SW TACT TSAD-1 1KEY BLACK 4PIN

EC-150ATA

Page 2 Recommended Spare Parts List

Page 44

LITE-ON TECHNOLOGY CORP.

5 F, No. 16, Sec. 4, Nanking E. Road, Taipei, Taiwan

Tel: 886-2-25706999 Fax: 886-2-25706888

URL:// www.liteontc.com.tw

Printed in Taiwan