JVC AV48P775, AV56P775, AV56P785 Service Manual

SERVICE MANUAL

REAR PROJECTION TELEVISION

YA17320052

AV-48P775/H, AV-56P775 AV-56P785

POWER

CATV VCR DVD

ASPECT

MULTI SCREEN

INDEX

SELECT

TWIN

SLEEP

FREEZE

SWAP

ML/MTS

DISPLAY

INPUT

123

D/A

456

i.LINK MENU

789

RETURN+

TIMER

TUNE

THEATER

VIDEO

SUB

FAVORITE

CHANNEL

PRO

STATUS

SUB

NATURAL CINEMA

SOUND

LIGHT

C.C.

MUTING

GUIDE

VOL VOL

BACK

VCR CHANNEL

VCR DVD

PREV NEXT

POWER

TV VCR

REW

FFPLAY

REC PAUSE

STOP

OPEN CLOSE

STILL PAUSE

RM-C14G

/H,

BASIC CHASSIS

[ AV-56P775 ]

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-59

No.YA173

2005/2

SPECIFICATION

Contents

Items

Dimensions (W × H × D) 120.0cm × 118.9cm × 62.2cm

(47-1/4" × 46-7/8" × 24-1/2")

Mass 76 kg ( 168 lbs ) 83 kg ( 183 lbs ) TV RF System (Analog / Digital) Analog : CCIR (M)

Digital : ATSC terrestrial / Digital cable Color System (Analog) NTSC Sound System (Analog) BTSC system (Multi Channel Sound) Teletext System (Analog) Closed caption (T1-T4 / C1-C4) Receiving Channels and Frequency (Analog)

TV / CATV Total Channel 191 Channels Intermediate Frequency (Analog) Color Sub Carrier (Analog) 3.58MHz Power Input AC 120V, 60Hz Power Consumption 259W (Max) Screen Transparent screen (unitized fresnel lens / double lenticular lens) Screen Size 48" (122cm) Measured diagonally

Projection Tube 17cm (6.7") tube × 3 ( R/G/B )

High Voltage 31kV+1.0kV/-1.3kV (at zero beam current)

Speaker 13cm round type × 2

Audio Power Output 10W+10W (Full range) Antenna Terminal (VHF/UHF, ATSC / DIGITAL CABLE IN) External Input (1/2/3/4) Component Video

Digital Input HDMI jack × 1, (Digital video / audio)

Audio Output (FIX) 500mV(rms) (-4dBs), low impedance (1kHz when modulated 100%), (RCA pin jack × 2)

Monitor / Recording Output

i Link Input / Output TS In/Out (4-pin, S400) × 2

Digital Audio Optical Output Digital out (optical) × 1 AV Compulink lll 3.5mm mini jack × 1 Remote Control Unit RM-C14G (AA/R6/UM-3 battery × 2)

VHF Low

VHF High

Video IF

Sound IF

[INPUT-1/2]

720p / 1080i

480i / 480p

S-Video

[INPUT-1/3/4]

S-Video

02ch~06ch : 54MHz~88MHz

07ch~13ch : 174MHz~216MHz

14ch~69ch : 470MHz~806MHz

UHF

CATV 54MHz~864MHz

Low Band : 02~06

High Band : 07~13

Mid Band : 14~22

Super Band : 23~36

Hyper Band : 37~64

Ultra Band : 65~94, 100~135

Sub Mid Band : 01, 96~99

45.75MHz

41.25MHz (4.5MHz)

(W:106.3 cm, H:59.8 cm), 16:9 ratio

75Ω unbalanced, coaxial, F-type connector × 2

RCA pin jack × 6

Y : 1V (p-p), (sync signal ±0.35V, 3 value sync), 75Ω

Pb/Pr : ±0.35V, 75Ω

Y : 1V (p-p) positive, negative sync, 75Ω

Pb/Pr : ±0.7V, 75Ω

Mini-DIN 4pin × 3

Y: 1V (p-p) positive, negative sync, 75Ω

C: 0.286V(p-p) (burst signal)

1V (p-p) positive, negative sync, 75Ω (RCA pin jack × 4)

Video

500mV(rms) (-4dBs), high impedance (RCA pin jack × 9)

Audio

(Digital-input terminal is not compatible with computer signal)

Analog audio : 500mV(rms) (-4dBs), high impedance (RCA pin jack × 2)

Mini-DIN 4 pin connector × 1

Y: 1V (p-p), 75Ω

C: 0.286V(p-p) (burst signal), 75Ω

1V (p-p), 75Ω (RCA pin jack × 1)

Video

250mV(rms) (-10dBs), Fs-18dB low impedance (RCA pin jack × 2)

Audio

IEEE1394 compliant DTCP digital copy protection compatible

AV-48P775

136.8cm × 129.6cm × 66.7cm (53-7/8" × 51-1/8" × 26-3/8")

56" (142cm) Measured diagonally (W:124 cm, H:69.8 cm), 16:9 ratio

Design & specifications are subject to change without notice.

AV-56P775 AV-56P785

1-2 (No.YA173)

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(1) The design of this product contains special hardware, many

circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only.

(2) Alterations of the design or circuitry of the products should not be

made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom.

(3) Many electrical and mechanical parts in the products have special

safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are

identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement

which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards.

(4) Use isolation transformer when hot chassis.

The chassis and any sub-chassis contained in some products are connected to one side of the AC power line. An isolation transformer of adequate capacity should be inserted between the product and the AC power supply point while performing any service on some products when the HOT chassis is exposed.

(5) Don't short between the LIVE side ground and ISOLATED

(NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE : ( ) side GND, the ISOLATED(NEUTRAL) : ( ) side GND and EARTH : ( ) side GND. Don't short between the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken.

(6) The high voltage applied to the picture tube must conform with that

specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product.

(7) If any repair has been made to the chassis, it is recommended that

the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).

(8) Do not check high voltage by drawing an arc. Use a high voltage

meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead

through a 10kΩ 2W resistor to the anode button.

(9) When service is required, observe the original lead dress. Extra

precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

(10) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

a) Dielectric Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 1100V AC (r.m.s.) for a period of one second.

(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rat-

ed up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires test equipment not generally found in the service trade.

b) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).

• Alternate Check Method

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter

having 1000Ω per volt or more sensitivity in the following manner. Connect a 1500Ω 10W resistor paralleled by a 0.15µF AC-

type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER (HAVING 1000 /V, OR MORE SENSITIVITY)

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

(11) High voltage hold down circuit check.

GOOD EARTH GROUND

After repair of the high voltage hold down circuit, this circuit shall be checked to operate correctly.See item "How to check the high voltage hold down circuit".

This mark shows a fast operating fuse, the letters indicated below show the rating.

A V

ON EACH EXPOSED ME TAL PAR T

POWER CORD REPLACEMENT WARNING.

Connecting the white line side of power cord to "WHT" character side.

PWB

White line side

WHT

(No.YA173)1-3

1.2 INSTALLATION

1.2.1 INSTALLATION SITE

(1) The rear of this set is provided with ventilation openings.

Install the set more than 5 cm from a wall and in a location with good ventilation.

(2) Avoid the following types of locations.

a) Unstable locations (location must be able to

withstand heavy weight). b) Locations subjected to direct sunlight. c) Near stoves or other heating devices. d) Locations subjected to humidity or oily smoke. e) Dusty locations.

f) Locations with strong vibration.

1.2.2 INSTALLATION ADJUSTMENT

When installing, moving or changing the orientation of the set, perform static convergence adjustment according to the following procedure. Adjusting CRT color convergence have two method, AUTO, MANUAL and RESET. It adjust on the MENU screen.

NOTE :

Please you have TV on for at least 20 minutes before sing this feature. This adjustment will be needed only when the colors of the characters/lines are separated and lack in distinction. If not, please don't perform the adjustment.

AUTO

(1) Press the [MENU] key, and select the "CONVERGENCE"

in the INITIAL SETUP menu with [function up/down] key.

(2) Press the [function left/right] key, then CONVERGENCE

menu appear. (3) Press the [function up/down] key, and select the "AUTO". (4) Press the [function left/right] key. (5) The convergence adjustment will start. It will take about

25 seconds.

MANUAL

(1) Press the [MENU] key, and select the "CONVERGENCE"

in the INITIAL SETUP menu with [function up/down] key. (2) Press the [function left/right] key, the CONVERGENCE

menu appears. (3) Press the [function up/down] key, and select the

"MANUAL". (4) Press the [function left/right] key, then CONVERGENCE

adjustment screen appear. [Fig.1]

• If all the crosses are white, no convergence adjustment is needed.

(5) Select the location you want to adjust by using the [number

(2/4/5/6/8)] keys on the remote control unit. [Fig.2]

(6) Press the [SELECT] key to change the color of the box

to the color of the cross you want to adjust (red or blue).

• You cannot adjust the green cross.

(7) Use the [function up/down] key and the [function left/

right] keys to adjust the position of the cross.

(8) Adjust the three colors crosses until they overlap and

appear as a single white cross.

(9) Press the [OK] key.

(more than 5cm)

Wall

VENTILATION OPENING

NOTE :

• When you adjust the convergence, make sure you start with the center position (position 5), and work your way around radial for best results.

• When you make the adjustment in the center (positions 5), you are making the adjustment for the whale screen. In other positions, you are making the adjustment only in that area.

• You can reset the adjustment if you do not like the results, See below.

• If you perform AUTO CONVERGENCE after performing MANUAL CONVERGENCE, your manual convergence you performed will be cancelled.

(10) Press the [menu] key to end the convergence adjustment

procedure.

RESET

RESET in the CONVERGENCE menu resets all convergence adjustments to the factory default setting.

Fig.1

Fig.2

1-4 (No.YA173)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

• Rear Projection HDTV with built-in ATSC tuner.

• New chassis design enable use of an interactive on screen control.

• 3-2 PULL DOWN : You can enjoy DVD movies at the highest picture quality.

• MOTION COMPENSATION : With this function, the seamless reproduction of dynamic motion on the screen has been realized.

• Bullet-in DSD (Digital Super Detail) circuit and 3 dimension Y/C separate circuit.

• Receive DTV broadcast (1080i / 720p / 480p / 480i)

• With HDMI jack / Component (Y / Pb / Pr) input.

• Built-in A.H.S., BBE circuit.

• Smart Sound and Smart Caption are available (AV-56P785 only).

2.2 DIFFERENCE LIST

Item AV-48P775 AV-56P775 AV-56P785

Smart Sound --- --- available Smart Caption --- --- available

2.3 FUNCTIONS

FRONT CONTROL KEY & TERMINAL

6 1 42

INPUT-4

S-VIDEO VIDEO AUDIO

OVER

RL/MONO

POWER

CHANNEL VOLUME SUPER

-+-+

OPERATE

FOCUS

MENU ( OPERATE ) button

CHANNEL -/+ ( OPERATE / ) buttons

VOLUME -/+ buttons

SUPER FOCUS button

POWER button

INPUT-4 terminal ( S-VIDEO / VIDEO / AUDIO )

POWER LED

REAR TERMINAL

75 (VHF/UHF)

AV COMPULINK III

ATSC

/DIGITAL CABLE IN

CABLE CARD

i.LINK IN/OUT S400(TS)

OPTICAL OUT

Digital Audio

CENTER

CHANNEL

INPUT

AUDIO OUT

DIGITAL IN terminal (

DIGITAL IN AUDIO ( ANALOG ) terminal

SERVICE ONLY

AUDIO (ANALOG)

VIDEO (DIGITAL)

AUDIO (DIGITAL)

DIGITAL IN

INPUT-1INPUT-2

VIDEO

OVER

AUDIO

OVER

MONITOR

S-VIDEO

/REC OUT

COMPONENT VIDEO

AUDIO VIDEO

INPUT-3

INPUT-2

INPUT-1

4 5

610

INPUT-1 terminal ( S-VIDEO / VIDEO / AUDIO )

INPUT-2 terminal ( VIDEO / AUDIO )

INPUT-3 terminal ( S-VIDEO / VIDEO / AUDIO )

MONITOR / REC OUT terminal ( S-VIDEO / VIDEO / AUDIO )

INPUT-1 COMPONENT VIDEO terminal ( Y / Pb / Pr )

INPUT-2 COMPONENT VIDEO terminal ( Y / Pb / Pr )

CENTER CHANNEL INPUT terminal

AUDIO OUT terminal

AV COMPULINK terminal

75 ( VHF / UHF ) (Analog) terminal

OPTICAL OUT Digital Audio terminal

i.LINK IN / OUT S400(TS) terminal

CABLE CARD slot

ATSC / DIGITAL CABLE IN terminal

SERVICE ONLY (SD CARD) slot

HDMI jack : VIDEO / AUDIO )

(No.YA173)1-5

REMOTE CONTROL UNIT [RM-C14G]

2 1

ASPECT

SELECT

ML/MTS

STATUS

NATURAL

CINEMA

VCR DVD

POWER

STOP

VIDEO

STILL PAUSE

POWER

SLEEP

DISPLAY

RETURN+

CHANNEL

LIGHT

GUIDE

BACK

TV VCR

FFPLAY

CATV VCR DVD

MULTI SCREEN

INDEX

TWIN

FREEZE

INPUT

D/A

i.LINK MENU

TIMER

FAVORITE

C.C.

MUTING

SWAP

THEATER

SOUND

123

456

789

TUNE

PRO

VOL VOL

VCR CHANNEL

PREV NEXT

REW

REC PAUSE

OPEN CLOSE

RM-C14G

SUB

POWER key

ASPECT key (16:9 / 4:3)

VCR / DVD switch (Set to VCR for SERVICE)

TV / CATV switch (Set to TV for SERVICE)

MULTI SCREEN operation keys [ TWIN, INDEX, SELECT, FREEZE & SWAP ]

INPUT key

D/A key (The D/A key changes the analog and digital channel)

[ Cable card is inserted into the TV, can not use this key.]

i LINK MENU key

TIMER key

TUNE key

FAVORITE key

THEATER PRO key

C.C.(Closed Caption) key

SOUND keys

MUTING key (memory key)

OK key

VOL+/- ( / ) keys (Set the setting value for SERVICE)

MENU keys

SLEEP key (Enter the SERVICE MENU)

DISPLAY key (Enter the SERVICE MENU)

ML/MTS key

Number (1~0) keys (Select the

RETURN + key

VIDEO STATUS key (Enter the SERVICE MENU)

SUB CHANNEL key

LIGHT key

NATURAL CINEMA key

GUIDE key

CH+/- ( / ) keys (Set the setting item for SERVICE)

BACK key

VCR / DVD operation key

SERVICE MENU

)

1-6 (No.YA173)

2.4 TECHNICAL INFORMATION

2.4.1 MAIN MICRO COMPUTER (CPU) FUNCTION (MN102H75K)

Pin No. Pin name I/O Function

1 ATSC_RX O ATSC serial communication

2 / VSYNC I V.sync for OSD

3 LB_PRO I Low B protection detection [Error : H]

4 NC - --------

5 /RST I Main CPU reset [Reset:L]

6 NC O --------

7 /TEST I +3.3V

8 OSD_YS O OSD Ys (blanking)

9SDA4 I/OI

C bus (data) for JCC5055

10 SYNC_SEL I Sync select [ATSC : L]

11 A_MU O Audio muting [Muting:H]

12 /HSYNC I H sync for OSD

13 M MUTE O Audio muting for MONITOR OUT

[Muting:L]

14 OSDXI - Oscillation for OSD

15 OSDXO - Oscillation for OSD

16 SDA2 I/O I

C bus (data) for MTS

17 AC IN I AC for time count

18 SCL2 O I

C bus (data) for MTS

19 NC - --------

20 VCOI I LPF

21 PDO O LPF

22 /IP_RESET O Reset for DIST [Reset:L]

23 OSD_YM O OSD Ym (transparence)

24 OSD_B O OSD blue

25 POWER_LED O Lighting for POWER LED

[HIGH / ON:H]

26 OSD_G O OSD green out

27 OSD_R O OSD red out

28 VREF I Reference voltage for OSD

29 IP_ERR I AMDP program load error detection

[Error : L]

30 IREF I Reference current for OSD

31 COMP I Phase adjust for OSD

32 AVDD I +3.3V

33 CLL I Clamp low level for SUB CCD

34 VREFLS I Reference voltage for SUB CCD

35 SUB_CCD I Video for sub closed caption decoder

36 NC - --------

37 VSS - GND

38 MAIN_CCD I Video for main closed caption

decoder

39 VREFHS I Reference voltage for MAIN CCD

40 CLH I Clamp high level for MAIN CCD

41 VDD I +3.3V

42 SCL4 O I

C bus (data) for JCC5055

43 NC O --------

Pin No. Pin name I/O Function

LED_ONTIMER

O Lighting for on temer LED

[ON TIMER ON:H]

45 CONVER_RXD O Convergence control

46 CONVER_TXD I Convergence control

47 SBT1 I Use for on board writing [Setting : H]

48 NC O --------

49 ATSC_RST O Reset for ATSC tuner [Reset : L]

50 NC O --------

51 ATSC POW O ATSC power control [ON : H]

52 NC O --------

53 NC O --------

54 DC_COTL O Black level DC reproduce control

55 NC O --------

56 NC O --------

57 REC_LED O ATSC-REC reseration

(Lighting for program LED(Red) [REC. ON : H]

58 /LOB_POW O Low-B power control [Power on:L]

59 /COMPLINK I AV COMPULINK III control

60 /POWERGOOD I Power condition check [ON : H]

61 /MECA_ON I Machine SW interrupt [Pushing:L]

62 /MAIN_POW O Main power control [Power on :L]

63 NC - --------

64 /B1 POW O B1 power control [Power on:L]

65 AFC1 I Main AFT control [No AFT : H]

66 X-RAY I X-ray protection detection

[Protection : 2.0V]

67 NC - --------

68 KEY2 (Key scan) I Front key scan 2 (CH+, VO L+ /- )

[No input : H]

69 KEY1 I Front key scan 1 (CH-, MENU)

[No input : H]

70 SCL1 O I2C bUS (clock) for EEP-ROM

71 SDA1 I/O I

C bus (data) for EEP-ROM

72 REMO I Remote control

73 NC O --------

74 VSS I GND

75 OSC2 O 4MHz oscillation for system clock

76 OSC1 I 4MHz oscillation for system clock

77 VDD I +3.3V

78 SCL0 O I

C bus (clock) for general

79 VOUTENB O ATSC video output signal control

[Out : H / Non out : L]

80 SDA0 I/O I2C bus (data) for general

81 NC O --------

82 ATSC_TX I ATSC serial communication

83 NC - --------

84 P_MU O Picture muting [Muting:H]

(No.YA173)1-7

2.5 MAIN PARTS LOCATION

2.5.1 PWB ASS'Y ARRANGEMENT

The PWB ASS'Y is indicated below.

No. PWB ASS'Y name AV-48P775HA AV-56P775HA AV-56P785HA

1. MAIN PWB ASS'Y SRP-1009A-M2 SRP-1010A-M2 SRP-1011A-M2

2. MI-COM & DIST MODULE PWB ASS'Y SRP0D009A-M2 ←←

3. POWER PWB ASS'Y SRP-9009A-M2 ←←

4. DEF & CONVERGENCE OUT PWB ASS'Y SRP-2009A-M2 ←←

5. DIGITAL CONVERGENCE MODULE PWB ASS'Y SRP0K009A-M2 SRP0K010A-M2 ←

6. DIGITAL INPUT MODULE PWB ASS'Y SRP-7809A-M2 SRP-7810A-M2 SRP-7811A-M2

7. FRONT CONTROL PWB ASS'Y SRP0L009A-M2 ←←

8. REMOTE SENSOR PWB ASS'Y SRP-8001A-M2 ←←

9. VM PWB ASS'Y SRP-7209A-M2 ←←

10. SD CARD PWB ASS’Y SRP-8509A-M2 ←←

11. R CRT SOCKET PWB ASS'Y SRP-3109A-M2 ←←

12. G CRT SOCKET PWB ASS'Y SRP-3209A-M2 ←←

13. B CRT SOCKET PWB ASS'Y SRP-3309A-M2 ←←

14. ATSC TUNER MODULE SSD-2103A-M2 ←←

FRONT CONTROL ASS'Y

FRONT CONTROL

B CRT SOCKET

PWB

G CRT SOCKET

PWB

COOLING FAN

MI-COM & DIST MODULE PWB

MAIN PWB

ATSC TUNER MODULE

SD CARD PWB

PROJECTION UNIT

G CRT SOCKET PWB

R CRT SOCKET PWB

REMOTE SENSOR PWB

VM PWB

DIGITAL CONVERGENCE MODULE PWB

DEF & CONVERGENCE OUT PWB

POWER PWB

DIGITAL INPUT MODULE PWB

AV TERMINAL BOARD

VM PWB

1-8 (No.YA173)

(This figure is only MAIN UNIT)

2.6 SCREEN HANDLING CAUTIONS

2.6.1 SCREEN STORAGE Store the SCREEN ASS'Y in a standing position in order to avoid deformation. If the screen is stored horizontally, there is risk of

deforming the screen face. When necessary to place the SCREEN ASS'Y horizontally, position the screen side upwards and sure to place spacers between the screen and resting site (floor or stand etc.) to prevent the screen from sagging.

2.6.2 SCREEN SURFACE

Since the screen surface is easily scratched or soiled, use ample care when handling.

DISASSEMBLY PROCEDURE

If the screen or screen panel need to be replaced, remove the 14 (48 inch) / 20(56 inch) screws A .

Leave the screen with protector, fresnel lens and double lenticular lens attached. If cannot be disassembled further.

SCREEN

SENSOR

SCREEN BRACKET

(RIGHT)

FRONT PANEL

SENSOR

SCREEN BRACKET

SENSOR

(x 2)

[56 inch only]

(BOTTOM)

SCREEN BRACKET

(x 4)

[56 inch only]

(TOP)

SCREEN BRACKET

(LEFT)

(x 14)

SENSOR

2.7 PROJECTION UNIT REPLACEMENT

2.7.1 ADJUSTMENT DURING REPLACEMENT

When replacing the three R, G and B projection units, first replace the R and B units and perform focus / screen / raster centering adjustments with reference to the G unit. Then replace the G unit and perform G focus / screen / convergence adjustment. Finally perform R & B . Convergence adjustments. Use care to simultaneously removes all three-projection units.

2.7.2 DISASSEMBLY CAUTION

The projection units include locations that are not to be disassembled during service. When replacing projection unit parts, disassemble to the state indicated in the figure below. The figure indicates screws and wires that are not to be removed. Use care not to remove these.

Deflection yoke wires : to connector on DEF/CONVERGENCE OUT PWB ASS'Y. [R="RHV", G="GHV", B="BHV"] Convergence yoke wires : to connector on DEF/CONVERGENCE OUT PWB ASS'Y. [R="R", G="G", B="B"]

2/4 POLE

Check that tape is applied to the CRT neck. If absent, the deflection yoke can dislodge.

Do not remove screws

LENS ASS'Y

LENS ASS'Y SCREW ( x 4)

MAGNET

TAP E

CRT ASS'Y (COUPLER ASS'Y)

Do not disassembly

R CRT SOCKET PWB ASS'Y G CRT SOCKET PWB ASS'Y B CRT SOCKET PWB ASS'Y

VM PWB (G only)

ANODE wires : to DIVIDER

DEF. / CONVER. YOKE

(No.YA173)1-9

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

• Make sure that the power cord is pull out from the AC wall outlet.

3.1.1 SPEAKER GRILLE

(1) Remove 2 screws [A] from rear side. (2) The SPEAKER GRILLE bottom is pull out to the front, and

4 claws which are fixing the SPEAKER GRILLE are removed.

(3) Take out the SPEAKER GRILLE.

*Remove the both side SPEAKER GRILLE same manner.

3.1.2 SPEAKER

• Take out the SPEAKER GRILLE. (1) Remove 4 screws [B]. (2) Take out the SPEAKER. (3) Disconnect the speaker wire from speaker terminal.

* Remove the both side SPEAKER same manner.

3.1.3 FRONT PANEL

• Take out the SPEAKER GRILLE. (1) Remove 4 screws [C]. (2) The FRONT PANEL upper is pull out to the front, and 2

claws which are fixing the FRONT PANEL are removed.

(3) Take out the FRONT PANEL.

3.1.4 FRONT CONTROL BOX

• Take out the SPEAKER GRILLE.

• Take out the FRONT PANEL. (1) Remove 5 screws [D]. (2) Take out the FRONT CONTROL BOX.

3.1.5 FRONT CONTROL PWB

• Take out the FRONT CONTROL BOX. (1) Remove 2 screws [E]. (2) Take out the connector [CN00R

the FRONT CONTROL PWB. Remove 3 screws

(3)

[F]

from rear side of FRONT CONTROL

BOX.

(4) Take out the FRONT CONTROL PWB.

], [CN001G], [CN001H] on

FRONT

SPEAKER

(x4)

CONTROL BOX

SPEAKER

GRILL

FRONT PANEL

FRONT CONTROL BOX

FRONT VIEW

FRONT CONTROL PWB

FRONT

CONTROL PWB

FRONT

CLAW

(x4)

CN001H

SPEAKER

WIRE

(x2)

CLAW

(x2)

CN001G

(x3)

(x5)

(x2)

CN00R

(x2)

(x5)

CLAW

(x4)

SPEAKER

GRILL

(x2)

(x3)

AV TERMINAL BOARD

1-10 (No.YA173)

CAUTION AT DISASSEMBLY

DIGITAL INPUT MODULE PWB

SB connector

Fig.1

Prior to disassembly, unplug the power cord from the AC outlet without fail. (Turn the power "off".) Short the SB connector [1] pin and [2] pin of the DIGITAL INPUT MODULE PWB. (At the time of assembling) Before the rear panel is inserted into the cabinet, release the short-circuit between the SB connector [1] pin and [2] pin of the DIGITAL INPUT MODULE PWB.

After releasing the short-circuit between the SB connectors, do not turn the power on until the rear panel is inserted into the cabinet. Negligence in carrying out the above steps may cause the inactivation of the TV.

3.1.6 SCREEN ASS'Y

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX. (1) Disconnect the connector [CN00Z

]. (2) Remove 4 screws [A] attaching the SCREEN ASS’Y. (3) Remove 10 screws [B] from rear side. (4) Take out the SCREEN ASS'Y.

NOTE :

• Please place the SCREEN ASS'Y on a flat table without fail.

• Because of the large size, at least 2 parsons are

recommended for removal and reassemble.

• Use core not to scratch the screen during work.

• During assembly, be sure to engage the left and right tabs

with the cabinet mounting positions.

• When than supporting the SCREEN ASS'Y, avoid grasping

the top of the screen panel, instead grasp the left and right areas.

3.1.7 CONVERGENCE SENSOR

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS’Y. (1) Remove the 1 screw [C] attaching the SENSOR HOLDER. (2) Remove the claw of the SENSOR HOLDER to take out the

CONVERGENCE SENSOR.

(3) Take out the 3 others CONVERGENCE SENSOR same

manner.

(x4)

(x10)

REAR COVER

SENSOR

HOLDER1

CLAW

CONVERGENCE

SENSOR

(Front view)

SCREEN ASS'Y

FRONT

CN00Z

BODY

Fig.2

SCREEN ASS'Y

FRONT

3.1.8 MIRROR

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS'Y. (1) Remove 9 screws [D] attaching the mirror brackets of the

upper, left and right side.

(2) Raise slightly to disengage of the mirror from the bottom

bracket. (If necessary, loosen the screws attaching the bottom bracket)

(3) Take out the MIRROR.

NOTE :

• The MIRROR is front coated.

Do not touch the front of the MIRROR.

• At least 2 persons are recommended for removable and

reassemble.

(x4)

FRONT

(x9)

MIRROR BRACKET

CONNECTOR

CONVERGENCE

SENSOR

MIRROR

Fig.3

SENSOR

HOLDER1

BRACKET

SENSOR

HOLDER2

REAR COVER

BODY

Fig.4

(No.YA173)1-11

3.1.9 REAR PANEL

(1) Remove 8 screws [A]. (2) Remove 4 screws [B]. (3) Take out the REAR PANEL.

NOTE :

• Before the rear panel is inserted into the cabinet, release the short-circuit between the [SB] connector [1] and [2] pin of the DIGITAL INPUT MODULE PWB. (Refer to "CAUTION AT DISASSEMBLY" on Page 10).

• After releasing the short circuit between the [SB] connectors, do not turn the power on until the rear panel is inserted into the cabinet.

• Prior to starting the work, be sure to read the following written instructions on the CAUTION LABEL attached to the REAR PANEL.

3.1.10 PARTITION

• Take out the REAR PANEL. (1) Pull out the PARTITION backward.

Prior to starting the work, be sure to read the following written instructions on the CAUTION LABEL attached to the REAR PANEL.

UNPLUG THE POWER CORD FROM AC OUTLET BEFORE OPEN THE REAR PANEL. When the rear panel is removed, follow "CAUTION AT DISASSEMBLY" procedure in the service manual before plugging the TV's power cord into an AC outlet. Failure to follow the procedure will result in PERMANENT damage to some of the television features.

FRONT

REAR COVER

PARTITION

(x8)

CAUTION LABEL

(x4)

REAR PANEL

BODY

Fig.5

3.1.11 REAR COVER

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the SCREEN ASS'Y. (1) Remove 2 screws [ C ]. (2) Remove 2 screws [ D ] from front side. (3) Slightly pull for backside to disengage of the REAR COVER

from hooks.

(4) Take out the REAR COVER.

NOTE :

• Because of the large size, at least 2 persons are

recommended for removal and reassemble.

REAR COVER

(x2)

HOOK

BRACKET

BODY

FRONT

(x2)

Fig.6

1-12 (No.YA173)

3.1.12 MAIN UNIT

• Take out the SPEAKER GRILLE.

• Take out the FRONT PANEL.

• Take out the REAR PANEL. (1) Remove 4 screws [A] from front side. (2) Disconnect the connector [CN00Z

(3) Remove 2 screws [B] attaching the MAIN CHASSIS and

BODY.

(4) Pull out the MAIN UNIT rear side.

NOTE :

• Except for confirmation of projection of images on the screen

and audio output through the speakers, the removed MAIN UNIT is still workable in the same state as if it is still built-in the TV set. Therefore, the MAIN UNIT can be removed, if necessary, for board diagnosis, electric testing, etc. apart from confirmation of screen images and audio output.

• When wire clamps are removed during work, use care to re-

store them precisely to their original positions. Performance can be affected if these are not returned to the original positions.

• Because of the large size, at least 2 persons are

recommended for removal and reassemble.

• When carrying the MAIN UNIT, use care not to drop, shock

or shake it.

• Do not stain or damage the lens of the PROJECTION UNIT.

• Do not look the projection side of a PROJECTION UNIT

when the image is projected.

3.1.12.1 CHECKING THE P.W. BOARD

When checking the MAIN PWB, POWER & LINE FILTER PWB, DEF & CONVERGENCE OUT PWB, etc., raise the MAIN UNIT with the front side down for the make of convenience.

3.1.13 FOCUS PACK

• Take out the MAIN UNIT. (1) Remove 1 screw [C] (Fig.7). (2) Take out the FOCUS PACK. (3) Take out wires connecting the FOCUS PACK.

BODY

(x4)

REAR SIDE VIEW

MAIN CHASSIS

CN00Z

(x2)

MAIN UNIT

FOCUS PACK

SPEAKER

WIRE

(x1)

SPEAKER CONNECTOR

FRONT

MAIN UNIT

BODY

FRONT

Fig.7

3.1.14 AV TERMINAL BOARD

• Take out the REAR PANEL. (1) Remove 4 screws [D]. (2) Remove 2 screws [E]. (3) Pull out the POWER CORD CLAMP from AV TERMINAL

BOARD right side.

(4) Disconnect the connector [AU], [DC], [Q] and [SR] on the

DIGITAL INPUT MODULE PWB.

(5) Take out the AV TERMINAL BOARD.

3.1.15 DIGITAL INPUT MODULE PWB

• Take out the AV TERMINAL BOARD. (1) Remove 1 screw [F]. (2) Remove 2 screws [G] from rear side of the AV TERMINAL

BOARD.

(3) Take out the DIGITAL INPUT MODULE PWB.

NOTE :

• When removing the DIGITAL INPUT MODULE PWB, refer

to the "CAUTION AT DISASSEMBLY" section on page 1-10.

(x2)

(x4)

FRONT

AV TERMINAL

BOARD

(x1)

MAIN

CHASSIS

Fig.8

DIGITAL INPUT

MODULE PWB

POWER

CORD CLAMP

(x2)

(No.YA173)1-13

3.1.16 MAIN CHASSIS

• Take out the REAR PANEL. (1) Remove 2 screws [A]. (2) Pull out the MAIN CHASSIS for backside.

NOTE :

If necessary, remove the anode wires, connectors, respectively.

•

3.1.17 COOLING FAN

• Take out the REAR PANEL. (1) Disconnect the connector [CN9701

] on the ATSC TUNER

MODULE. (2) Remove 4 screws [B]. (3) Take out the COOLING FAN.

3.1.19 SD CARD PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Remove 3 screws [F]. (2) Disconnect the connector [CN1001

] on the SD CARD

PWB.

(3) Take out the SD CARD PWB.

3.1.20 DIGITAL CONVERGENCE MODULE PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Remove 2 screws [G]. (2) Take out the DIGITAL CONVERGENCE MODULE PWB.

MI-COM & DIST MODULE PWB AND ATSC TUNER MODULE

3.1.18

• Take out the REAR PANEL.

• Take out the AV TERMINAL BOARD.

• Take out the MAIN CHASSIS. (1) Disconnect the connector [CN000E

], [CN000Y] on the MI-

COM & DIST MODULE PWB.

(2) Disconnect the connector [CN9601

] on the ATSC TUNER

MODULE. (3) Remove 2 screws [C]. (4) Remove 4 screws [D]. (5) Remove 5 screws [E]. (6) Take out the MI-COM & DIST MODULE PWB and ATSC

TUNER MODULE.

(x4)

COOLING FAN

(x5)

ATSC TUNER

MODULE

CN9601

HANGER

BRACKET

CN9701

CN000E

MI-COM & DIST

MODULE PWB

CN1001

CN000Y

3.1.21 DEF & CONVERGENCE OUT PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Remove 1 screw [H]. (2) Take out the DEF & CONVERGENCE OUT PWB.

3.1.22 POWER PWB

• Take out the REAR PANEL.

• Take out the MAIN CHASSIS. (1) Remove 1 screw [I]. (2) Take out the POWER PWB.

SD CARD

PWB

(x3)

(x4)

(x2)

(x1)

(x2)

(x1)

FRONT

1-14 (No.YA173)

MANI CHASSIS

POWER PWB

DEF & CONVERGENCE OUT PWB

Fig.9

(x2)

DIGITAL CONVERGENCE MODULE PWB

FRONT

3.1.23 PROJECTION UNIT

• Take out the SPEAKER GRILLE.

• Take out the FRONT CONTROL BOX.

• Take out the REAR PANEL.

• Take out the MAIN UNIT. (1) Take out the CRT SOCKET PWB. (2) Remove 4 screws [A]. (3) Pull out the PROJECTION UNIT upward.

NOTE :

• Refer to "PROJECTION UNIT REPLACEMENT" on page 1-

9 when taking out and replacing the PROJECTION UNIT.

• When wire clamps are removed during work, use care to

restore them precisely to their original positions. Performance can be affected if these are not returned to the original positions.

3.1.24 HV DIVIDER

• Take out the REAR PANEL. (1) Remove 1 screw [B]. (2) Take out the HV DIVIDER.

*Wires of the transformer (FBT) and CRT of each PROJECTION UNIT can be removed by turning the connector portions.

NOTE :

• If necessary, remove the anode wires, and replacing the HV

DIVIDER, take care to correctly engage the connector.

3.1.25 REMOTE SENSOR PWB

• Take out the REAR PANEL. (1) Disconnect the connector [R]. (2) Remove 1 screw [C]. (3) Take out the REMOTE SENSOR PWB.

REMOTE

SENSOR PWB

Pull

CONNECTOR

Turn

(x1)

FRONT

(x4)

(x1)

Fig.10

PROJECTION UNIT

REMOTE

SENSOR PWB

HV DIVIDER

(No.YA173)1-15

3.2 MEMORY IC REPLACEMENT

3.2.1 MEMORY IC

This memory IC stores data for proper operation of the video and deflection circuits. When replacing, be sure to use an IC containing this (initial value) data.

3.2.2 MEMORY IC REPLACEMENT PROCEDURE

(1) Power off

Switch off the power and disconnect the power cord from the wall outlet.

(2) Replace the memory IC

Initial value must be entered into the new IC.

(3) Power on

Connect the power cord to the wall outlet and switch on the power.

(4) SERVICE MENU setting

Before entering the SERVICE MENU, confirm that the setting of TV/CATV SW of the REMOTE CONTROL UNIT is at the "TV" side and the setting of VCR/DVD SW of the REMOTE CONTROL UNIT is at the "VCR" side. If the switches have not been properly set, you cannot enter the SERVICE MENU.

a) Press [SLEEP TIMER] key and, while the indication

of SLEEP TIMER 0 MIN is being displayed, press [DISPLAY] key and [VIDEO STATUS] key (Fig.2)

simultaneously. b) The SERVICE MENU screen of Fig.1 is displayed. c) Verify what to set in the SERVICE MENU, and set

whatever is necessary (Fig.1).

Refer to the SERVICE ADJUSTMENT for setting. d) Press the [BACK] key twice to return normal screen.

(5) Receive channel setting

Refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the receive channels (Channels Preset) as described.

(6) User settings

Check the user setting items according to after page. Where these do not agree, refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the items as described.

SERVICE MENU SELECT KEY

VCR/DVD switch

TV/CATV switch

MEMORY (MUTING)

FUNCTION (LEFT)

SERVICE MENU

1.PICTURE/SOUND

2.YC SEP

3.WHITE BALANCE

4.MEMORY SETUP

5.RF AFC

6.CONVER A

Fig.1

CATV VCR DVD

ASPECT

MULTI SCREEN

INDEX

SELECT

TWIN

FREEZE

SWAP

ML/MTS

INPUT

123

D/A

456

i.LINK MENU

789

TIMER

TUNE

THEATER

VIDEO

FAVORITE

PRO

STATUS

NATURAL

SOUND

CINEMA

C.C.

MUTING

VOL VOL

VCR CHANNEL

VCR DVD

PREV NEXT

POWER

REW

REC PAUSE

STOP

OPEN CLOSE

STILL PAUSE

RM-C14G

Fig.2

7.CONVER B

8.IP

9.DSD

0.HDMI

POWER

SLEEP

DISPLAY

RETURN+

SUB

CHANNEL

SUB

LIGHT

GUIDE

BACK

TV VCR

FFPLAY

POWER

SLEEP TIMER

DISPLAY

NUMBER

VIDEO STAUS

FUNCTION (UP)

FUNCTION (RIGHT)

BACK

FUNCTION (DOWN)

3.2.3 SERVICE ADJUSTMENT ITEM

Setting item Item No. Remark Setting item Item No. Remark

1.PICTURE/SOUND 6.CONVER A AUDIO A01~A27 Convergence adjustment CPA01~CPA11

DEFLECTION D01~D32 CBA01~CBA94 FACTORY setting F01~F70 7.CONVER B

2.YC SEP Convergence adjustment -----YC separation setting YCM001~YCM185

YCS001~YCS114 DIST process setting IPA001~IPA042 Do not adjust

Do not adjust

8.IP

3.WHITE BALANCE 9.DSD LOW LIGHT/HIGH LIGHT adjustment

BR, DRV R, DRV B, CUT R, CUT G, CUT B

DSD process setting DSA001~DSA053

DSB001~DSB053

4.MEMORY SETUP ------ Do not adjust DSC001~DSC044

5.RF AFC DSD001~DSD017 TUNER RF AFT setting TUNER, AFC,FINE

Do not adjust

0.HDMI Digital input setting HDM001~HDM080

RHD001~RHD170

1-16 (No.YA173)

Do not adjustVIDEO S01~S99 CCA01~CCA12

Do not adjust

3.2.4 FACTORY SETTING

VIDEO STATUS MEMORY (NTSC / 480i / 480p)

Setting value

Item

TINT COLOR PICTURE BRIGHT DETAIL

COLOR

TEMPERATURE

STANDARD00000LOW THEATER 0 0 0 0 0 HIGH DYNAMIC 0 0 +10 0 +5 LOW GAME 0 0 -10 0 0 HIGH

VIDEO STATUS MEMORY (720p / 1080i)

Setting value

Item

TINT COLOR PICTURE BRIGHT DETAIL

COLOR

TEMPERATURE

STANDARD00000LOW THEATER 0 0 0 0 0 LOW DYNAMIC 0 0 +5 0 +10 LOW GAME 0 0 -10 0 0 HIGH

CHANNEL SETTING (CHANNEL SUMMARY)

Band CH display Setting Band CH display Setting

02 YES

J 23 YES D03-1 YES K 24 -------D03-2 YES L 25 --------

VHF

D03-3 YES M 26 --------

04 YES N 27 -------05 YES O 28 -------06 YES P 29 -------07 YES Q 30 --------

SUPER

08 YES R 31 YES 09 YES S 32 YES

VHF

10 YES T 33 -------11 YES U 34 -------12 YES V 35 -------13 YES W 36 YES

UHF

14 YES

D22-1 YES A-4 96 YES

36 YES A-3 97 YES

SUBMID

D40-1 YES A-2 98 YES

63 YES 69 YES W+12 48 YES

HYPER

A-5 95 YES

W+11 47 YES

A 14 YES W+23 59 YES

MID

B 15 YES C 16 YES W+51 87 YES D 17 YES W+88 119 YES

ULTRA

E 18 YES W+90 125 YES

W+29 65 YES

F 19 -------- G 20 -------H 21 --------

I 22 YES

(No.YA173)1-17

SHIPPING FACTORY SETTING (USER SETTING)

Setting item Setting value Setting item Setting value

POWER CHANNEL VOLUME INPUT

DISPLAY ASPECT VIDEO STATUS

SOUND

SMART SOUND OFF

SPLIT SOURCE LEFT SIDE : CA 02

POSITION ADJUSTMENT CENTER CH INPUT XDS ID CONVERGENCE POWER INDICATOR

Off CABLE-02 10 TV

OFF REGULAR DYNAMIC

A.H.S

OFF

BBE

ON OFF (AV-56P585 only)

RIGHT SIDE : INPUT1

Center OFF ON AUTO HIGH

TINT / COLOR / PICTURE/ BRIGHT / DETAIL

COLOR TEMPERATURE DIG. NOISE CLEAR VSM (Velocity Scan Modulation)

NATURAL CINEMA BASS / TREBLE / BALANCE MTS ON / OFF TIMER LANGUAGE NOISE MUTING FRONT PANEL LOCK CLOSED CAPTION FRONT PANEL LOCK V1 SMART INPUT VIDEO INPUT LABEL

AUTO SHUT OFF DIGITAL-IN DIGITAL AUDIO CHANNEL SUMMARY

V-CHIP AUTO DEMO

Refer to setting of Video status memory at shipping factory setting

LOW OFF ON

AUTO Center STEREO OFF ENG ON OFF OFF ( CC1 / T1 ) OFF OFF BLANK

OFF SIZE 1

DIGITAL Refer to Last memory (CH. summary) OFF OFF

1-18 (No.YA173)

3.3 REPLACEMENT OF CHIP COMPONENT

3.3.1 CAUTIONS

(1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and the resist parts of the pattern. (3) When removing a chip part, melt the solder adequately. (4) Do not reuse a chip part after removing it.

3.3.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it. (2) A 30w soldering iron is recommended for easily removing parts.

3.3.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

(1) As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

(2) Shift with the tweezers and remove the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

[Resistors, capacitors, etc.]

(1) Apply solder to the pattern as indicated in the figure.

(2) Grasp the chip part with tweezers and place it on the

solder. Then heat and melt the solder at both ends of the chip part.

[Transistors, diodes, variable resistors, etc.]

(1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the

solder.

(3) First solder lead A as indicated in the figure.

(2) As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove the chip part.

Note :

After removing the part, remove remaining solder from the pattern.

(4) Then solder leads B and C.

(No.YA173)1-19

+ 42 hidden pages