Daewoo SP-110 Service Manual

S/M No. :TSP110AEF0

Service Manual

Model : DSP-4210GM

CHASSIS : SP-110

DAEWOO ELECTRONICS CO., LTD

http : //svc.dwe.co.kr

May.2001

TABLE OF CONTENTS

1.	Safety precautions ...........................................................................................................................	2
2.	Product specification ......................................................................................................................	4
3.	Block diagram ..................................................................................................................................	6
4. Adjustment (How to use service remote controller) .....................................................................		7
5. When changing the new board.......................................................................................................		9
6. Trouble shooting ..............................................................................................................................		10
7. Assembly list ....................................................................................................................................		30
8.	Circuit diagram .................................................................................................................................	31
9.	Exploded view ..................................................................................................................................	35

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Service manual SP-110

1. SAFETY & PRECAUTIONS

SAFETY CHECK AFTER SERVING

Examine the area surrounding the repaired location for damage or deterioration. Observe that screw, parts and wires have been returned to original positions. Afterwards, perform the following tests and conform the specified values in order to verify compliance with safety standards.

1-1. Insulation resistance test

Confirm the specified insulation resistance between power cord plug prong and externally exposed parts of the set (video and audio input terminals, speaker out terminals etc) is greater than values given in table 1 below.

1-2. Dielectric strengthen test

Confirm specified dielectric strengthen between power cord plug prongs and exposed accessible parts of the set (video and audio input terminals, speaker out, etc) is greater than values given table 1 below.

1-3. Clearance distance

When replacing primary circuit component, confirm specified clearance distance (d), (d’) between soldered terminals (see Fig1), and between terminals and surrounding metallic parts. See table 1 below.

Rating for selected areas (table 1)

AC Line Voltage	Region	Insulation		Dielectric	Clearance
AC Line Voltage	Region	Resistance		Strength	Distance(d),(d’)
		Resistance		Strength	Distance(d),(d’)
100V	Japan	1M	/ 500V DC	1kV AC 1min.	3
110 to 130V	USA &Canada		-	900VAC 1min	3.2
110 to 130V	Europe				6(d)
110 to 130V	Australia	10M	/ 500V DC	4kV AC 1min.	8(d)
200 to 240V	Australia	10M	/ 500V DC	4kV AC 1min.	8(d)
200 to 240V	LatinAmerica				(a : Power cord)
	LatinAmerica				(a : Power cord)

* Class model only

NOTE

This table is unofficial and for reference only. Be sure to confirm the precise values for your particular.

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Service manual SP-110

1-4. Leakage current test

Confirm specified or lower leakage current between

B(earth ground, power cord plug prongs) and externally exposed accessible parts (video and audio input termin-

als, speaker out, etc.)

Measuring method:(Power ON) lnsert load Z between

B(earth ground, power cord plug prongs) and exposed

accessible parts. Use AC voltmeter to measure AC voltage across both terminals of load Z. See Fig.2 and following table.

Leakage current ratings for selected are as

Ac Line Voltage	Region	Load Z Leakage Current( i ) Clearance Distance(d),(d’)
100V	Japan	1		i	1mArms.	Exposed accessible parts
		1
110 to 130V	USA & Can-	1	15 F	i	0.5mArms.	Exposed accessible parts
110 to 130V	ada		15 F	i	0.5mArms.	Exposed accessible parts
	ada
			i	0.7mA peak		Antenna earth terminals
110 to 130V	Europe	2		i	2mAdc	Antenna earth terminals
110 to 130V	Europe	2		i	2mAdc
200 to 240V	Australia	50	i		0.7mA peak	Other terminals
				i	1mAdc	Other terminals
				i	1mAdc

NOTE

This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

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Service manual SP-110

2. PRODUCT SPECIFICATION

[ DSP-4210GM ]

ITEM		SPECIFICATION		REMARK
1. GENERAL
1-1. MODEL NO	DSP-4210GM
1-2. CHASSIS NO	SP-110
1-3. SCREEN SIZE	42” (16:9)
1-4. COUNTRY	WORLD WIDE
1-5. RESOLUTION	853(W) X 480(H)
1-6. REMOCON TRANSMITTER TYPE	R-V2A(ENGLISH), R-V2AK(KOREAN)
1-7. SAFETY STANDARD	UL, CSA, CE, KE
2. MECHANICAL
2-1. DIMENSION
1) WITHOUT STAND	W X H X D = 1055 X 652 X 85
2) WITH STAND	W X H X D = 1055 X 730 X 85
3) BOX	W X H X D = 1190 X 870 X 480
2-2. WEIGHT
1) WITHOUT STAND	33kg
2) WITH STAND	39kg

3. ELECTRICAL & OPTICAL
3-1. COMPOSITE VIDEO INPUT SIGNAL	NTSC,PAL,SECAM,PAL-M/N,NTSC4.43
	1 INPUT ( 75 , 1Vp-p )
3-2. Y/C INPUT SIGNAL	50/60Hz, Super Jack 1 Input( 75		,1Vp-p )
3-3. DTV/DVD INPUT SIGNAL	Y,Pb/Cb,Pr/Cr 1 Input
	( 75	,1Vp-p )
	* DTV Resolution Mode ( Y, Pb, Pr ) :
	1920X1080i, 1280X720p,
	640X480p
	* DVD ( Y,Cb,Cr ) : 50/60Hz
3-4. PC SIGNAL	R,G,B,H,V 15Pin D-sub jack 1 Input
	( 75	,1Vp-p )
	* Resolution Mode : VGA - UXGA
3-5. SOUND INPUT SINAL	Composite, Y/C : L/R Phone Jack 1Pair
	DTV/DVD : L/R Phone Jack 1Pair
	PC : L/R Phone Jack 1Pair
	* Input Impedance 47

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	Service manual	SP-110

ITEM	SPECIFICATION	REMARK
3-6. Optical Chracteristics
1) Display Resolution	16:9 Wide 853 X 480
2) Peak Luminance	160cd/ m2
3) Contrast Ratio	500:1
4) Color Temperature	8000o K
3-7. Scaling	<Scaling Mode>
	PC, DTV : Fill to Aspect Ratio,
	Fill to Screen
	DVD, VIDEO : Normal, Wide, Panaroma,
	Letter Box, Letter Box with Sub Title
	<Scaling Adjust>
	PC,DTV (User Control) : H-Size, V-Size
	H-Position, V-Position
3-8. Zoom	Zoom+, 4Direction Paning Avaiable
3-9. PIP	Video Window in DTV/PC Picture
	PIP Size, Position Changeable
3-10.OSD	8Language
	KOREAN,ENGLISH,NETHERLAND,
	FRENCH,SPANISH,GERMAN,
	PORTUGUESE,ITALIAN
3-11. AC Power	AC 90V-264V, 50/60Hz
3-12. Power Consumption	350 WATTS
3-13. Sound Output	L : 8Watts, R : 8Watts
3-14. LAN Interface	Option
3-15. Settop Box Interface	Option
3-16. Others	Freeze Picture, Video Rotation

4. USER CONTROL & ACCESSORIES
4-1.CONTROL
1) SET	AC POWER, MENU, INPUT SELECT, UP,
	DOWN, LEFT, RIGHT
2) REMOCON TRANSMITTER	INPUT SELECT,POWER,RECALL, ZOOM-,
	ZOOM+,MENU,UP,DOWN,LEFT,RIGHT,
	PICTURE MODE,FREEZE,SCREEN MODE,
	MUTE
4-2. ACCESSORIES	1) REMOCON : R-V2A, R-V2AK
	2) BATTERY : “AAA” 2EA
	3) INSTRUCTION MANUAL
	4) STAND (OPTION)
	5) WALL HANGER (OPTION)
	6) SPEAKER UNIT 2ASS’Y (OPTION)

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Service manual SP-110

3. BLOCK DIAGRAM

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Service manual SP-110

4. Adjustment

4-1. How to confirm the origianl data of VIDEO PCB

(1)Input selection : You select video mode

(2)You confirm the original data of user control

-Brightness : 36 ( :20 in case of DTV/PC input mode )

-Contrast : 60

-Sharpness : 2

-Colour : 32

-Tint : 0 ( Center )

(3)You confirm the original data of SERVICE MODE (PW364) ( See 4-4 )

-Sub-Brightness : 60

-Sub-Contrast : 70

-R-Bias : 63

-G-Bias : 63

-B-Bias : 68

-R-Gain : 53

-G-Gain : 57

-B-Gain : 76

4-2. How to adjust POWER PCB

(1)Devices for measurement : Digital volt meter, Pattern generator

(2)Conditions : You adjust as follows after assembling set and inputting WHITE PATTERN.

1)VSUS(Sustain voltage) : Voltage sustaining electronic discharge TP : P12

Adjustment control : RV600 Standard voltage : 166V

2)VSCAN(Scan voltage) : Scan voltage when recording DATA TP : PA9 #6 PIN of Y PCB

Adjustment control : RV14 Standard voltage : -160V

3)VADD(ADDRESS voltage) : Voltage recording DATA TP : P14

Adjustment control : VRS1 Standard voltage : 80V

4-3. X/Y PCB adjustment

(1)Devices for measurement : Digital volt meter, Pattern generator

(2)Previous adjustment voltage : You adjust as follows after assembling set and inputting BLUE PATTERN.

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Service manual SP-110

1)VSHELF(SHELF voltage) : X-electrode sustain voltage when recording DATA TP : RCU25

Adjustment control : RU5 Standard voltage : +60V

2)VVH(SCAN VH voltage) : VH voltage of SCAN IC when scanning

TP : RY7 voltage each side

Adjustment control : RY6

Standard voltage : -70V

(3)The final operation adjustment

1)Input a monochrome pattern of R,G,B. And then you check if there are abnormal OFF-state pixels (which must be in ON-state but are in OFF-state).

If any, increase VSUS voltage slowly from 166V to remove abnormal OFF state pixels in that pattern.

2)If there is no abnormal OFF-state pixel in monochrome pattern of R,G,B, make sure if there is abnormal OFF-state in Magenta, Cyan, Yellow or not. If any, increase VSUS slowly in that pattern.

3)Increase VSUS, which is set as above, by 1V.

4)Make sure if there are abnormal ON-state pixels(which must be on OFF-state but are in ON-

state, for example, R or G) in Blue pattern after aging Blue pattern 5 minutes. If any, set VSCAN slowly from - 160V to - 150V and decrease VSHELF slowly to remove wrong electronic discharge.

4-4. White balance adjustment

(1)Feed grey scale signal to video input terminal.

(2)Confirm the original data of user control (See 4-1).

(3)Press Remote controller in order starting with UP => MUTE => RECALL => MUTE BUTTON

to access Service adjustment mode and select PW364. And then confirm the original data of the Service mode PW364 register. (See 4-1).

(4)Make sure you can’t recognize any grey scale errors in the form of colour tint in this darker bands.

(5)You attach the sensor of a White balance meter to the white part on the upper end of this grey scale pattern.

(6)Set White balance changing R,G,B-Gain.

•You make sure that R,G,B-Gain must be set within the limit of 6320. If it is over the limit, it is N.G.

•How to adjust temperature of colour

X = 0.290 0.01, Y = 0.310 0.01

Temperature of colour : 8,300o K

(7)You can set Luminance level changing Sub-contrast.

•If the set data of Sub-contrast is over the limit of 80, it is N.G.

(8)Press Menu button, to escape from Service mode.

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Service manual SP-110

5. When fitting a new board

5-1. Video

(1) Check the related adjustments are correctly set as per previous page. 5-2. X-Sustain

(1)Set the VSHELF voltage according to the list of adjustments.

(2)The data of adjustment voltage is on the label, which is attached on the metal part under

Y-Sustain board.

5-3.Y-Sustain

(1)Set the Vvh voltage according to the list of adjustments.

(2)The data of adjustment voltage is on label, which is attached on the metal part under Y-Sustain board.

5-4. Power module

(1)You set each voltage according to the list of adjustments.

(2)The data of adjustment voltage is on the label, which is attached on the metal part under Y-Sustain board.

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Service manual SP-110

6. Trouble shooting

6-1. Audio/video

6-2. Digital

6-3. X-SUSTAIN

6-4. Y-SUSTAIN

6-5. SCAN Board

6-6. DATA H/L, Connection(LU,CU,RU,LD,CD,RD)

6-7. Power

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Service manual SP-110

6-1. Audio/Video

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Service manual SP-110

* IMAGE PROCESSOR PART BLOCK DIAGRAM

Service manual SP-110

NO Video screen ( Composite input )

Check start

Does the ‘Please check input

Is there a weak electronic

1.Confirm AC connection

signal or press “input” key.’

discharge on the screen?

2.Confirm Power S/W on

message appear?

3.Inspect Digital and X,Y

1.Make sure of

is PA603 properly

Confirm Video to digital

connection of

connected?

Connector PA603

Is the signal input jack

correctly connected?

Jack(PDP Monitor

& A/V device)

is DVS,DHS,DCLK

Video PCB is N.G

of Video PCB P603

Change PCB

Does the input source operate?

Operate A/V device,

being outputted?

Which is used.

1.Confirm other PCBs Video PCB than

2.Change PA603

Is input selection in Video mode?

Confirm

input selection

Does the ‘DTV, PC’ screen

appear after inputting signal

1. Video signal processing is N.G

to DTV or PC jack?

2. Change video PCB

Can you see input to P502 No.43 V1

1. Inspect jack PCB

of Video PCB?

2. Inspect input jack

Can you see input to TP Y0, V0?

1. Video S/W and 3D COMB filter

(IC402) are N.G

2. Change video PCB

Can you output Sync of TP V2 : 60Hz/ 50Hz H2 : 31.5KHz/KHz?

1.Video signal processing is N.G

2.Change Video PCB

1.Confirm if IC400 and IC401 are N.G

2.Change video PCB

CAUTION : 1.You must only remove PA603 after confirming that you switch off the power.

2. You must thoroughly understand instruction manual before removing Back cover.

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Service manual SP-110

NO DTV screen (1080I, 720P, 480P)

Check start

Does the ‘Please check input

Is there a weak electronic

1.Confirm AC connection

signal or press “input” key.’

discharge on the screen?

2.Confirm Power S/W on

message appear?

3.Inspect Digital and X,Y

1.Make sure of

is PA603 properly

Confirm Video to digital

connection of

connected?

Connector PA603

Is the signal input jack

correctly connected?

Jack(PDP Monitor

& A/V device)

is DVS,DHS,DCLK

Video PCB is N.G

of Video PCB P603

Change PCB

Does the input source operate?

Operate A/V device,

being output?

Which is used.

1.Confirm other PCBs than Video PCBs

2.Change PA603

Is input selection in DTV/DVD mode?

Confirm

input selection

Does the ‘Video’ screen

appear after inputting signal

1. DTV signal processing is N.G

to Video jack?

2. Change video PCB

Can you see input to P502 No.10

1. Inspect jack PCB

YD1 of Video jack?

2. Inspect input jack

Can you output DTV signal in

1. DTV S/W and DTV processor(IC505) circuit are N.G

TP R,G,B?

2. DTV H/V Sync processing part is N.G

3. Change video PCB

Can you output Sync of TP V1:Hz/ H1 : KHz/ Hz?

1.Video signal processing is N.G

2.AD Converter(IC500) is N.G

3.Change Video PCB

1. DTV S/W and DTV processor (IC505) circiuit are N.G

2. Change video PCB

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Service manual SP-110

NO PC screen

Check start

Does the ‘Please check input

Is there a weak electronic

1.Confirm AC connection

signal or press “input” key.’

discharge on the screen?

2.Confirm Power S/W on

message appear?

3.Inspect Digital and X,Y

1.Make sure of

is PA603 properly

Confirm Video to digital

connection of

connected?

Connector PA603

Is the signal input jack

correctly connected?

Jack(PDP Monitor

& PC)

Does DVS,DHS,DCLK

Video PCB is N.G

of Video PCB P603

Change PCB

Does the input source operate?

Operate A/V device,

being output?

Which is used.

1.Confirm other PCBs than Video PCB

2.Change PA603

Is input selection in PC mode?

Confirm

input selection

Does the ‘Video’ screen

appear after inputting signal

1. PC signal processing is N.G

to Video jack?

2. Change video PCB

Can you see input to P502 No.9,8,31,32,33

1. Inspect jack PCB

R,G,B,Hsync,Vsync of Video PCB?

2. Inspect input jack

Can you output PC signal in

1. PC S/W and DTV processor(IC505) are N.G

TP R,G,B?

2. PC H/V Sync processing part is N.G

3. Change video PCB

Can you output Sync of TP V1 : Hz/ H1 : KHz/ Hz?

1. PC S/W is N.G 2.Change video PCB

1.PC signal processing is N.G

2.A/D Converter is N.G

3.Change Video PCB

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Service manual SP-110

NO Sound

Check start
Does the screen appear?	N
Does the screen appear?	1. Confirm AC connection

2.Confirm power S/W on

3.Inspect video PCB and other blocks

is the sound signal input jack 1.Make sure of connection of jack(PDP monitor & A/V device) correctly connected?

is the speaker properly connected?

Connect speaker

See: Siganl composition of P502 sound

1. RSPC, LSPC => PC sound

2. RSD1, LSD1 => DTV/DVD sound

Is sound signal output from P502?

1. Jack PCB is N.G

2. Video connection to

3. RSV1, LSV1 => VIDEO, S-VHS sound

jack PCB is N.G

is sound signal on P400 No.2,3

1. Sound S/W is N.G

of audio PCB?

2. Confirm IC404

3. Change video PCB

is sound signal on PA400 No.2,4

1. PA400 connector is N.G

of audio PCB?

2. Change audio PCB

is sound AMP on PA300 No.1,4 of N audio PCB processing an output?

Does sound AMP on PA300 No.1,4 and JP659 of audio PCB produce an output?

1.Speaker or sound cable is N.G

2.Change speaker or sound cable

		N
Is power fed to PA3 of		N	1. Confirm if PA3 connector is N.G
Is power fed to PA3 of			1. Confirm if PA3 connector is N.G
audio PCB?			2. Change power board
	Y

N1. PA300 is N.G (Change audio PCB) or JP659 is N.G (Change jack PCB)

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Service manual SP-110

NO Remote Controller operation

Check start

	N
		1. Confirm AC connection
Is red LED next to POWER S/W

		2. Confirm power S/W on
on?		2. Confirm power S/W on
on?

3.Inspect video PCB, LED PCB and other blocks

Does Remote Controller operate?

Is screen on with key input?

1. Confirm Remote Controller operation and battery

N 1. Connection with video PCB is N.G or video PCB N.G 2. Inspect video PCB and other blocks

	Y
		N
Is there waveform when pressing remocon		N	1. LED PCB is N.G
			2. Change LED PCB
in IR NO.2 of P602			2. Change LED PCB



1. IR receipt block of video PCB is N.G
2. Inspect video PCB and other PCBs

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Service manual SP-110

NO Key operation

Check start

Is red LED on next to POWER S/W on?

N Does power come on with

remocon?

1. Confirm AC connection

2. Confirm power S/W on

3. Inspect video PCB, LED PCB and other blocks

1. Connection with video PCB is N.G or Video PCB is N.G

2. Inspect video PCB and other blocks

	N
Is connection between PA601 of key PCB	N	1. PA601 connector is N.G
Is connection between PA601 of key PCB		1. PA601 connector is N.G
and video PCB good?		2. Change key PCB

1. Inspect video PCB and other PCBs

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Service manual SP-110

6-2. DIGITAL

Checking Order for normal operation of Digital Board and Check Points

( * Measure RMS voltage with a multi-meter, refer to the attached picture for position of check points )

1.After make sure that the set turns off, turn off the High Voltage ON/OFF Switch of the Power Board and then turn on the set

2.Confirm whether there is an input of 5V, 3.3V into Power Connector ( PA5 ).

-5V input (pin No.1,2) : If 4.5V ~ 5.2V, O.K.

-3.3V input (pin No.7,8) : If 3.0V ~ 3.5V, O.K.

3.Confirm whether Power 2.5V, 3.3V_1, 3.3V_2, 3V_3, 5V_1, 5V_2

-2.5V : If 2.2V ~ 2.7V, O.K.

-3.3V : If 3.0V ~ 3.5V, O.K.

-5V : If 4.5V ~ 5.2V, O,K.

4.Confirm Reset and V_MUTE

-Reset : If 3.0V ~ 3.5V, O.K.

-V_MUTE :If 3.0V ~ 3.5V, O.K.

5.Confirm CONF_DONE ( ID102, ID103 )

-CONF_DONE : If 3.0V ~ 3.5V, O.K.

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Service manual SP-110

6-3. X-SUSTAIN BOARD

1.Separate PA7 and PA114 connector

2.Check the remaining electrical voltage of PA7

(1)Check the Voltage of Terminal 170V : If maintained beyond 10 volt, discharge (below 5 volt) with resistance of beyond 1K ohm 5 Watt

3.Confirm the value of series and parallel resistance of RU10//RU13-RU11//RU14-RU12//RU15

(1)Each value of resistance : 6.8 ohm 5 Watt

(2)The total value of resistance : 10.2 +/- 0.5 ohm

(3)In case of wrong value of resistance, replace (open) board and confirm each connector : the state of insertion ( installation )

4.In case of normal value of resistance, measure the value as following table1.

(1)Use a Diode Tester

(2)If abnormal part is found, replace the board

(3)In case of normal state, Inspect connectors and other boards

Table 1. PA7 The value of Diode Tester of each terminal * + : red, - : black

	NAME	DIODE	MEASURE		DIODE		MEASURE
		TESTER			TESTER
1	170V	+	About 5 sec.	-		0.49
	GND	-	Later,	+
			Open

2	15V	+	About 3 sec.	-		0.47
	GND	-	Later,	+
			Open beyond 2V

3	CU1(5V)	+	Beyond 1.43	-		0.48

	GND	-			+

Table 2. PA114 The value of Diode Tester of each terminal * + : red, - : black

The configuration of terminal ( top view, components side )

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Service manual SP-110

DIODE TESTER

MEASURE

DIODE TESTER

MEASURE

GND

0.6

GND

0.5

0.6

0.5

0.6

0.5

0.6

0.5

0.6

0.5

0.6

0.5

0.6

0.5

0.6

0.5

Table 3. The value of Diode Tester of each Semiconductor

* + : red, - : black

NAME

DIODE

MEASURE

DIODE

MEASURE

TESTER

QU5/QU6

ABOUT 5

0.48

SEC. LATER,

OPEN

QU7/QU8

Open

0.48

QU17/QU18

Open

0.45

QU15/QU16

Open

0.45

QU23~QU26

Open

0.4

QU19~QU22

Open

0.4

QU12

Open

0.49

QU11

Beyond 2.3

0.49

QU9

ABOUT 5

0.5

SEC.LATER,

OPEN

QU4

Open

0.5

QU13/QU14

Open

0.48

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Service manual SP-110

6-3. Y-SUSTAIN BOARD

1.Separate PA9, PA111 connector

2.Confirm the remaining electrical Voltage of PA9

(1)Confirm the Voltage of Terminal 170V : If maintained beyond 10 volt, discharge(below 5 volt) with resistance of beyond 1K ohm 5 Watt

(2)Confirm the Voltage of Terminal -155V : If maintained beyond -10 volt, discharge(below -5 volt) with resistance of beyond 1K ohm 5Watt

3.Confirm the resistance of RY2 ( 470 ohm 5Watt )

(1)In case of wrong value, replace board and confirm each connector

4.In case of normal value of resistance, measure the value as following Table 1.

(1)Use a Diode Tester

(2)If abnormal part is found, replace the board

(3)In case of normal state, Inspect connectors and other boards

Table 1. PA9 The value of Diode Tester of each terminal * + : red, - : black

	NAME	DIODE	MEASURE	DIODE	MEASURE
		TESTER		TESTER
1	170V	+	About 3 Sec. Later,	-	Beyond 0.8
	GND	-	Open	+
2	-155V	+	Beyond 0.7	-	Open
	GND	-		+
3	ON/OFF	+	Open	-	Beyond 2.4
	GND	-		+
4	15V	+	Beyon 0.7	-	About 5 Sec. Later, beyond 0.4
	GND	-		+

Table 2. PA111 The value of Diode Tester of each terminal * + : red, -: black

The configuration of terminal (top view, components side)

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Service manual SP-110

DIODE TESTER

MEASURE

DIODE TESTER

MEASURE

GND

1.2

GND

0.5

0.6

0.5

0.6

0.5

0.6

0.5

1.2

0.5

1.2

0.5

0.6

0.5

0.6

0.5

0.6

0.5

0.6

0.5

1.2

0.5

0.6

0.5

0.6

0.5

1.2

0.5

Table 3. The value of Diode Tester of each Semiconductor

* + : red, - : black

NAME

DIODE

MEASURE

DIODE

MEASURE

TEST

QY5~QY8

ABOUT 3

0.4

SEC. LATER,

OPEN

QY9~QY12

Open

0.4

QY1~QY2

Open

0.4

QY3~QY4

Open

0.4

QY25~QY28

Open

0.4

QY20~QY23

Open

0.4

QY15~QY16

Open

0.4

QY19

Open

0.4

QY14

Open

0.4

QY13

Beyond 1

Open

QY2

Open

0.4

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Service manual SP-110

6-5. SCAN BOARD

1.Confirm the DIOED TESTER, PCB separately

2.The configuration

(1)The Voltage Terminal of Scan (top view, components side)

	DIODE TESTER	MEASURE	DIODE TESTER	MEASURE

A	+	Beyond 0.6	-	Open

B	-		+

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Service manual SP-110

6-6. DATA H/L, CONNECTION(RU,CU,LU,RD,CD,LD)

1.Confirm the upper part and the lower part

(1)Separate PA10 and PA11

(2)Confirm DIODE TESTER

2.Separate P112

(1)Confirm LU and two DATA H boards

3.Separate PA113

(1)Confirm CU and DATA H board

(2)Confirm RU and two DATA H boards

4.Separate P115

(1)Confirm LD and two DATA L boards

5.Separate P116

(1)Confirm CD and DATA L board

(2)Confirm RD and two DATA L boards

Table 1. The value of Diode Tester of each terminal * + : red, - : black

	NAME	DIODE TESTER	MEASURE	DIODE TESTER	MEASURE

1	Vadd	+	Open	-	0.6
	GND	-		+

2	5V	+	Beyond	-	0.5

	GND	-	1.3	+

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Service manual SP-110

6-7. POWER CHECK

When the set is switched on, the power LED turns red?

1. Check Fuse F1 open

2. Check RC 1(Bridge Diode)

YES

open/short

When remote controller is switched on, LED turns green?

Is 7PIN of CONNECTOR P2

Check

0 V?

VIDEO

YES

PCB?

Check R20, R21, R22 open

Push the SW1 (Slide switch) of POWER MODULE

After P3 CONNECTOR is

in the opposite direction of

separated, is each voltage

Then, check LOW B+.

(30V, 12V, 5V) correct?

Is each voltage (30V, 12V, 5V) of CONNECTOR P3

YES

correct?

Check Audio AMP PCB

YES

After P5 CONNECTOR is

Is each voltage(5V, 3.3V) of CONNECTOR P5

separated, is each voltage

correct?

(5V, 3.3V) correct?

YES

Check Digital PCB

Is 1 pin voltage of CONNECTOR P7 and P9	NO	After P7 CONNCETOR is	YES	Check
correct at 15V?		Separated, 15V		X-sus
correct at 15V?		Separated, 15V		X-sus
		present?		PCB
				PCB

YES

Is 1 pin voltage of CONNECTOR P10 and P11 correct at 15V?

					Check
	After P9 CONNCETOR is			YES	Check
	After P9 CONNCETOR is
					Y-sus
	Separated, 15V


	present?				PCB
	present?

			NO

NO
NO		After P10 CONNCETOR is
		Separated, 15V
		present?				YES
		present?

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Service manual SP-110

		NO			YES
		NO			YES

				Check
YES	After P11 CONNECTOR is		YES	Check
YES	After P11 CONNECTOR is		YES	CONNE-
	Separated, is 15V			CONNE-
	Separated, is 15V			CTION
	produced?			CTION
	produced?			PCB





	Replace Power Module

Push the SW1(Slide Switch) POWER Module in the direction of

Then, check High Voltage And turn on the Power,

Can Vsus(170V) be produced?

YES

Turn on the POWER. Can Vadd(70V) be produced?

YES

Turn on the POWER. Can Vscan(-155V) be produced?

YES

Without Connector P7

YES

Check

Can Vsus(170V) be

X-sus PCB

producde?

Without Connector P9

YES

Is the

Can Vsus(170V) be

Voltage

produced?

Of Conncetor

P7,5PIN 0V?

YES

Check

Y-sus PCB

YES

Without Connector P10

Can Vadd(70V) be

produced?

Check

Y-sus PCB

Without Connector P11

Can Vadd(70V) be

produced?

YES

Without Connector P9

YES

Check

Can Vscan(-155V) be

Y-sus

produced?

PCB

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Service manual SP-110

E N D

Replace

POWER

Module

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