JVC HD-61FN97, HD-61FH97, HD-56FN97, HD-56FH97 Service Manual

SERVICE MANUAL

D-ILA PROJECTION TELEVISION

YA40920069

HD-56FH97, HD-56FN97,
HD-61FH97, HD-61FN97

BASIC CHASSIS

RA2

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

COPYRIGHT © 2006 Victor Company of Japan, Limited

No.YA409

2006/9

SPECIFICATION

Items

Dimensions ( W × H × D ) 129.2 cm × 94.4 cm × 45.0 cm

Mass 41 kg (91 lbs) 45 kg (99 lbs)

TV RF System (Analog
/ Digital)

Color System (Analog) NTSC

Stereo System (Analog) BTSC (Multi Channel Sound)

Teletext System (Analog) Closed caption (T1-T4 / CC1-CC4)

TV Receiving Channels
and Frequency
(Analog)

TV / CATV Total Channel 191 Channels

Intermediate
Frequency (Analog)

Color Sub Carrier Frequency (Analog) 3.58 MHz

Power Input AC120V, 60Hz

Power Consumption 215W

Projection Source 110W High-pressure mercury lamp

Projection Device D-ILA device (Reflection active matrix type LCD) x 3(R / G /B)
Resolution Total=H:1952 × V:1088 [ Effective =H:1920 × V:1080 ]

Screen Transparent screen (unitized fresnel lens / lenticular lens), aspect ratio 16:9

Screen Size

Audio Power Output 10W + 10W
Speaker 8.5cm × 12.5cm oval type × 2 (Oblique corn)

Antenna Terminal (VHF/UHF, ATSC / DIGITAL CABLE IN)

Video / Audio Input
[INPUT-1/2/3/4]

Digital Input Video

PC (RGB) Input D-sub 3-row 15pin × 1

Center Channel Input 500mV(rms) (-4dBs), high impedance, RCA pin jack × 1

Monitor / Recording
Output

Audio Output

iLink Input/Output TS In/Out (4-pin, S400) × 2, IEEE1394 compliant DTCP digital copy protection compatible
Digital Audio Optical Output Digital SPDIF × 1

RS-232C
Remote Control Unit RM-C14G (AA/R6 / UM-3 battery × 2)

Component Video

Analog

Digital

VHF Low

VHF High

UHF

CATV

Video IF

Sound IF

[INPUT-1/2]

1125i / 750p

525p / 525i

S-Video

[INPUT-1/3]

Video
Audio

Audio

S-Video

Video
Audio

Variable

Fix

HD-56FH97 HD-56FN97 HD-61FH97 HD-61FN97

(50-7/8" × 37-1/8" × 17-3/4")

CCIR (M)
ATSC terrestrial / Digital cable

02ch - 06ch : 54MHz - 88MHz
07ch - 13ch : 174MHz - 216MHz
14ch - 69ch : 470MHz - 806MHz
54MHz - 804MHz
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

45.75 MHz

41.25 MHz (4.5MHz)

56" (142cm) Measured diagonally
H:124 cm

F-type connector, 75Ω unbalanced, coaxial × 2
RCA pin jack × 6

Y : 1V (p-p) (Sync signal: 0.35V(p-p), 3-value sync.), 75 Ω
Pb/Pr : ±0.35V(p-p), 75 Ω
Y : 1V (p-p), positive (Negative sync provided), 75 Ω
Pb/Pr : 0.7V(p-p), 75 Ω
Mini-DIN 4 pin × 2
Y: 1V (p-p), positive (Negative sync provided), 75 Ω
C: 0.286V (p-p) (Burst signal), 75 Ω
1V (p-p), positive (Negative sync provided), 75 Ω, RCA pin jack × 4
500mV (rms), high impedance, RCA pin jack × 8

HDMI 2-row 19pin connector × 2
(Digital-input terminal is not compatible with picture signals of personal computer)
Digital: HDMI 2-row 19pin connector × 2
Analog: 500mV(rms) (-4dBs), high impedance, RCA pin jack × 2

R/G/B : 0.7V (p-p), 75Ω
HD / VD : 1V (p-p) to 5V (p-p), high impedance
< Available signal >
VGA : 640 pixels × 480 pixels (Horizontal : 31.5kHz / Vertical : 60Hz)
XGA : 1024 pixels × 768 pixels (Horizontal : 48.4kHz / Vertical : 60Hz)

Mini-DIN 4pin × 1
Y: 1V (p-p), 75Ω
C: 0.286V(p-p) (burst signal), 75Ω
1V (p-p), 75Ω, RCA pin jack × 1
250mV(rms) (-10dBs), Fs-18dB low impedance, RCA pin jack × 2

RCA pin jack × 2
More than 0 to 1000mV (rms) (+2.2dBs)
500mV(rms) (-4dBs), low impedance (1000Hz when modulated 100%)

D-sub 2-row 9 pin [External control for TV set]

×

V:69.8cm

---

Contents

140.3 cm × 101.6 cm × 48.4 cm
(55-1/4" × 40" × 19")

61" (155cm) Measured diagonally
H:135 cm × V:76.0cm

D-sub 2-row 9 pin [External control for TV set]

Design & specifications are subject to change without notice.

---

1-2 (No.YA409)

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 which
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) 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 the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.

(5) 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.

(6) 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, screw heads, 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 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated 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 a 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

GOOD EARTH GROUND

1500 10W

PLACE THIS PROBE
ON EACH EXPOSED
ME TAL PAR T

(No.YA409)1-3

1.2 INSTALLATION

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

LOB 0 FAN 0
AUD 0

ANA 9 DIG 9

0000 0
0

1.2.1 HEAT DISSIPATION

If the heat dissipation vent behind this unit is blocked, cooling
efficiency may deteriorate and temperature inside the unit will
rise. The temperature sensor that protects the unit will be
activated when internal temperature exceeds the predetermined
level and power will be turned off automatically.
Therefore, please make sure pay attention not to block the heat
dissipation vent as well as the ventilation outlet behind the unit
and ensure that there is room for ventilation around it.

Do not put foreign objects near the ventilation holes as this
can result in fire or electrical hazards.
Do not block the ventilation holes as this may cause the
internal temperature to rise and possibly result fire.

1.3 LAMP UNIT HANDLING CAUTION

LAMP UNIT : TS-CL110UAA

1.3.1 PRECAUTION FOR LAMP UNIT
The lamp emits high intensity white, ultraviolet and infrared
light. Do not look directly at the light during service.
Also, do not touch the lamp directly as it presents a burn
hazard.
Handle with extra care. This lamp emits high heat and
contains high-pressure during use.
Do not give any impact as this may cause the broken lamp.

Intake hole

*Diagram differs from actual appearance.

Exhaust hole

1.2.2 INSTALLATION REQUIREMENTS

Ensure that the minimal distance is maintained, as specified
fingure, between the unit with and the surrounding walls, as well
as the floor etc.
Install the unit on stable flooring.
Take precautionary measures to prevent the unit from tipping in
order to protect against accidents and earthquakes.

CAUTION FOR INSTALLATION

• Do not tilt the TV towards the left or right, or toward the back.

• Install the TV in a corner on the floor so as to keep cords out
of the way.

• The TV will generate a slight amount of heat during
operation. Ensure that sufficient space is available around
the TV to allow satisfactory cooling.

200 mm

150 mm

LAMP

POWER

*Diagram differs from actual appearance.

150 mm

200 mm

INPUT

MENU

OPERATE

+

INPUT-4

CHANNEL

Ð

VIDEO

+

L/MONO

VOLUME

Ð

R
AUDIO

50 mm

1.3.2 HOW TO CONFIRM LAMP OPERATING TIME

• MAXIMUM COUNT TIME= 65535 hours
(1) Set to "0 minutes" using the [SLEEP TIMER] key.
(2) Press the [VIDEO STATUS] key and [DISPLAY] key

simultaneously, then enter the SERVICE MODE.

(3) When the SERVICE MENU SCREEN is displayed, press

[2] key to enter the SELF CHECK MODE.

(4) The use time of a lamp is displayed on middle of the screen

by the hexadecimal number of 4 figures.

SERVICE MENU SCREEN

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

SELF CHECK MODE SCREEN (Page 1)

LOB 0 FAN 0
AUD 0

ANA 9 DIG 9

0000 0
0

Lamp operation time (Hexadecimal)

CALCULATION EXAMPLE OF LAMP USE TIME

Ex. Display number=12EF

3

1x16

+2x162+Ex16+Fx1=1x4096+2x256+14x16+154847 hours

1-4 (No.YA409)

1.3.3 LAMP UNIT REPLACEMENT

(1) The lamp replacement message will appear when need to

change the lamp. After replace the lamp, need to reset the
timer which is built into TV.

(2) Lamp use time can be check at the lamp message MENU.

If lamp use time exceeds 5000 hours, the message of
Fig.1 will be displayed on a screen.

(3) If Fig.1 message appears when turn the TV on, need to

replace the lamp.

(4) Use the lamp timer reset only after replacing the lamp.

NOTE:

• This message will appear every time turn on the TV, when
the lamp needs to be replaced. Press the [OK] key to make
the message disappear, or replace the lamp.

LAMP REPLACEMENT MESSAGE

LAMP NEEDS TO BE REPLACED.
REFER TO OWNER'S MANUAL FOR
REPLACEMENT INSTRUCTIONS.

AFTER REPLACING THE LAMP,
PLEASE RESET TIMER IN THE TV
MENU.

PRESS OK, IF YOU DO NOT WANT
TO SEE THIS MESSAGE AGAIN.

1.3.6 PRECAUTION FOR REPLACEMENT

• Do not replace the LAMP UNIT immediately after the projector
has been used.

• The temperature of the LAMP UNIT is still high and could
cause a burn.

• Allow a cooling period of 1 hour or more before performing
replacement.

• Before starting LAMP UNIT replacement work, turn off the
MAIN POWER switch, and disconnect the AC power cord plug
from the wall outlet.

• If touched, the lamp glass surface may rupture and burns may
result. Do not touch the glass portion or metal portion. Handle
only plastic handle.

• The replaced old lamp can be discarded in the same manner
as a fluorescent lamp. Check local ordinances and dispose of
the used lamp as prescribed.

Fig.1

1.3.4 HOW TO REPLACE THE LAMP UNIT

• Refer to the "USERS GUIDE" for a detailed operating
description.
(1) Turn off the TV power.
(2) After the LAMP LED light has stopped blinking, disconnect

the power cord from the AC outlet.

(3) Loosen 1 screw then take out the lamp cover below the left

side of the TV.
(4) Loosen 2 screws then take out the lamp unit.
(5) Install the new lamp unit.
(6) Re-install the lamp cover.

NOTE:

• After installing the new lamp unit, do not forget to reset the

lamp timer.

1.3.5 HOW TO RESET THE LAMP TIMER

• Refer to the "USERS GUIDE" for a detailed operating
description.
(1) Press the [MENU] key to select CLOCK / TIMERS.
(2) Select the <LAMP TIMER RESET> with [] / [] keys.
(3) Enter the <LAMP TIMER RESET> mode, the following

message will appears.

PRESS OK TO RESET THE LAMP TIMER

(4) Press the [OK] key while the above message appears on

the screen.

(5) The lamp timer has now been reset, and the following

message will appear.

THE LAMP TIMER IS RESET SUCCESSFULLY

(No.YA409)1-5

1.4 SERVICE PARTS KIT INSTRUCTIONS

Due to the character of this product, these OPTICAL /DRIVE
ASS'Y are prepared.
Please note these OPTICAL/DRIVE ASS'Y when replacing or
ordering the parts.

OPTICAL/DRIVE ASS'Y

1.4.1 PART NUMBER AND CONSTRUCTION

Kit parts number Kit part name

TS-COP13A-SAA OPTICAL / DRIVE ASS'Y

1.4.2 OPTICAL / DRIVE ASS'Y CONSTRUCTION

(1) OPTICAL BLOCK

(Included D-ILA DEVICE, PROJECTION LENS)
(2) OPTICAL BASE
(3) DRIVE PWB ASS'Y

This PWB is mounted with 1 memory IC saved with

adjustment, setting data of the drive circuit.
(4) SHIELD COVER
*The following parts without the kits part.

• REMOTE SENSOR PWB ASS'Y

• LAMP UNIT

• LAMP FAN DUCT

• THERMOSTAT

1.5 SCREEN HANDLING CAUTIONS

1.5.1 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.

1.5.2 SCREEN SURFACE

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

1.5.3 PRECAUTIONS FOR CLEANING AND REPLACEMENT

• The SCREEN ASS'Y is made from the lenticular lens and
fresnel lens. The anti static proceeding and the surface of the
lenticular lens. Rubbing the surface with something hard, the
coating may peel off.

• When the screen is dirty, gently wipe it with a soft cloth.
If the screen is very dirty, wipe it down with a cloth dipped in a
diluted kitchen cleaner (neutrality detergent) and thoroughly
wrung-out. Then wipe immediately after with clean, dry cloth.
Never use the organic solvent such as the alcohol or benzine.

• The SCREEN ASS'Y replacement is required if the coating
was peel off. Alkaline detergent or acidity detergent can not be
be used.

• The notched side of the lenticular lens and the fresnel lens are
faced each other.

• Do not rub the screen when cleaning it or replaceing it.
Rubbing the screen may cause of the scratch of the screen by
its notch.

1.4.3 PRECAUTION FOR USING

(1) In the case of the following defects/problems, replace this

kit (OPTICAL/DRIVE ASS'Y)

a) Picture defect caused by optical system/D-ILA device

related parts.

b) Picture defect caused by drive circuit.

(2) The DRIVE PWB ASS'Y is mounted with a memory IC

[IC3753
SHADING, etc.) of the drive circuit.
The data of this memory IC is in the optimal state according
to individual D-ILA devices and each section of the
OPTICAL BLOCK.

(3) When replace the DRIVE PWB ASS'Y, take off the 1

memory IC from the original board and replace with new
one. When replace the DRIVE PWB ASS'Y, do same
manner. Replace 1 memory IC.

(4) After the replacement of the OPTICAL BLOCK, projection

lens focus adjustment and drive convergence / projection
adjustment are required.

1-6 (No.YA409)

] saved with adjustment/setting data(GAMMA,

2.1 SYSTEM SETTEING

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

LOB 0 FAN 0
AUD 0

ANA 9 DIG 9

0000 0
0

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

Be sure to carry out the following operation at the end of
the procedure.

(1) Set to "0 minutes" using the [SLEEP TIMER] key.
(2) While "0 minutes" is displayed, press the [VIDEO

STATUS] key and [DISPLAY] key simultaneously, then
enter the SERVICE MODE.

(3) When the SERVICE MENU SCREEN is displayed, press

[2] key to enter the self check mode.

(4) Turn off the power by pressing the [POWER] key on the

remote control unit.

2.2 FEATURES

Built in ATSC (Advanced Television Systems Committee)
TUNER

This TV can receive both Digital broadcasting (ATSC) and
Analogue broadcasting.

D.I.S.T. (Digital Image Scaling Technology)

This system uses line interpolation to double the number of
scanning lines and achieve high resolution, flicker-free picture.

SMART CAPTION

Smart caption will appear when you press the MUTING button,
only on channels where the broadcast contains CLOSED
CAPTION information.

VIDEO STATUS

Expression of a favorite screen can be chosen by the VIDEO
STATUS function.

DIGITAL INPUT

Digital-in will display when any picture signal in Digital-in is
displayed.

V-CHIP

Since the V-CHIP is built in, it can choose, view and listen to a
healthy program.

SERVICE MENU SCREEN

SERVICE MENU

1. ADJUST

2. SELF CHECK

3. I2C STOP

SELF CHECK MODE SCREEN

LOB 0 FAN 0
AUD 0

ANA 9 DIG 9

0000 0
0

MTS STEREO

The voice multiplex function of the MTS system is built in.
(MTS = Multi channel Television Sound system)

MPEG Noise Reduction

This function effects the block noise removal and mosquito NR
simultaneously.

MaxxBass

This function emphasizes the bass sound.

A.H.S.+

Adds a more spacious surround sound. Music gives basic effect,
and movie for more effect.

VOICE ENHANCEMENT

Gives a clearer sound quality of the voices in what you are
watching.

NATURAL CINEMA

Watching the movie or animation, press the Natural Cinema to
adjust the out line of the images to make thin more sharp.

VIDEO INPUT LABEL

This function is used to label video input connections for the
onscreen displays.

2.3 MAIN DIFFRENCE LIST

Item HD-56FH97 HD-56FN97 HD-61FH97 HD-61FN97

FRONT PANEL COLOR BLACK SILVER & BLACK BLACK SILVER & BLACK

DIGITAL PWB SRA0D124A-M2 SRA0D127A-M2 SRA0D123A-M2 SRA0D126A-M2

ANALOG PWB SRA-1015A-M2 SRA-1016A-M2 SRA-1015A-M2 SRA-1016A-M2

SIDE CONTROL PWB SRA0L012A-M2 SRA0L013A-M2 SRA0L012A-M2 SRA0L013A-M2

(No.YA409)1-7

2.4 TECHNICAL INFORMATION

2.4.1 D-ILA DEVICE SPECIFICATION

Item Content

Resolution H: 1952 × V:1088

Pixel number about 2123776

Pixel size H : 8.1µm × V :8.1µm

Aspect ratio 16 : 9

Contrast ratio 5000 : 1

Aperture ratio 89% or more

Effective pixel measurement 0.7 inch

2.4.2 PROJECTION UNIT

R DEVICE

B DEVICE

2.4.4 D-ILA DEVICE STRUCTURE

R / G / B DEVICE (SIDE VIEW)

Back

Plane

Flat film

Reflective pixel
electrode

Liquid
crystal

Glass
substrate

Incident light
Projection light

FRONT

Transparent
electrode

G DEVICE

OPTICAL IRIS

2.4.3 IMAGE LIGHT FLOW

DEVICE UNIT SECTION (TOP VIEW)

Projection

light

BRG

Device

R

Mirror

Incident light

Lamp unit

FRONT

B

Device

BRG

Incident

light

PIXEL VIEW (FRONT VIEW)

8.1 m

Pixel

8.1 m

1-8 (No.YA409)

Device

G

MirrorMirror

2.4.5 MAIN CPU PIN FUNCTION [IC7601

Pin Pin name I/O Function Pin Pin name I/O Function

1 VHOLD1 I Data slice for main screen closed caption 51 NC O Not used

2 HFLT1 I/O LPF for main screen closed caption video input 52 NC O Not used

3 NC O Not used 53 NC O Not used

4 NC O Not used 54 NC O Not used

5 DIGR0 O R [0] for OSD 55 NC O Not used

6 TB1in I AC power for timer clock 56 NC O Not used

7 REMO I Remote control 57 NC O Not used

8 BYTE I Data bus width select [L = 16bit (fixed)] 58 NC O Not used

9 CNVss I CPU programming mode select [Normal = L] 59 NC O Not used

10 DIGG0 O G [0] for OSD 60 NC O Not used

11 DIGB0 O B [0] for OSD 61 NC O Not used

12 RESET I Reset for main CPU [Reset = L] 62 HSYNC I H. sync for OSD

13 Xout O System clock osillation (crystal) : 16MHz 63 NC O Not used

14 Vss - GND 64 VSYNC I V. sync for OSD

15 Xin I System clock osillation (crystal) : 16MHz 65 NC O Not used

16 VccI I 3.3V stand-by power supply 66 NC O Not used

17 OSC1 I Clock for OSD 67 NC O Not used

18 OSC2 O Not used : Clock for OSD 68 NC O Not used

19 INT1 I Not used: AV COMPULINK control 69 NC O Not used

20 INT0 I

21 OUT1 O Ys (blanking) for OSD 71 P2.1 O Not used: Clock for Inter IC (serial) bus control

22 OUT2 O YM (transparence) for OSD 72 P2.0 I/O Not used: Data for Inter IC (serial) bus control

23 NC O Not used 73 NC O Not used

24 NC O Not used 74 NC O Not used

25 NC O Not used 75 NC O Not used

26 NC O Not used 76 NC O Not used

27 CTA2/RTS2 O Not used 77 NC O Not used

28 CLK2 O Not used 78 NC O Not used

29 RxD2 I Digital tuner control 79 NC O Not used

30 TxD2 O Digital tuner control 80 P1.0 O Not used: Function LED lighting

31 SDA2 I/O Not used 81 P0.7 O Not used: Communication LED lighting

32 DIGR1 O R [1] for OSD 82 P0.6 O Test point

33 DIGG1 O G [1] for OSD 83 NC O Not used

34 DIGB1 O B [1] for OSD 84 WAKE O Reset for sub(chassis) CPU

35 TxD0 I Data receive (serial) for external programming 85 CARD_DET I Not used

36 RxD0 O Data transmission (serial) for external programming 86

37 CLK0 I Clock for external programming 87 SDA I/O Data for Inter IC (serial) bus control : memory

38 RTS0 O Busy for external programming [Operation = H] 88 SLC O Clock for Inter IC (serial) bus control : memory

39 P5.7 I Not used 89 DIGR2 O R [2] for OSD

40 P5.6 O Not used 90 DIGG2 O G [2] for OSD

41 HOLD I CPU programming mode select [Normal = H] 91 DIGB2 O B [2] for OSD

42 P5.4 O Not used 92 NC O Not used

43 P5.3 O Not used 93 KEY2 I

44 P5.2 O Not used 94 KEY1 I

45 P5.1 O Not used 95 VHOLD2 I Data slice for sub screen closed caption

46 WR O CPU programming mode select [Normal = L] 96 HLF2 I/O LPF for sub screen closed caption video input

47 P4.7 O

48 P4.6 I

49 P4.5 I Clock for sub(chassis) CPU communication (serial) 99 VCCE I 5V stand-by power supply

50 P4.4 O Not used 100 CVIN1 I Video(Y) for main screen closed caption

Request for sub(chassis) CPU communication (serial data)

Data transmission for sub(chassis) CPU communication (serial)

Data receive for sub(chassis) CPU communication (serial)

: DIGITAL PWB ASS'Y]

70 NC O Not used

POWER_SW

97 CVIN2 I Video(Y) for sub screen closed caption

98 TVSETB I Test terminal [L Fixed]

I Power switch (mechanical) detection

Key scan data for front control button (MENU/CH+/CH-) KEY2

Key scan data for front control button (INPUT/VOL+/VOL-) KEY1

(No.YA409)1-9

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

CAUTION AT DISASSEMBLY:

• Be sure to perform the SYSTEM SETTEING, at the end of the procedure.

• Make sure that the power cord is disconnected from the outlet.

• Pay special attention not to break or damage the parts.

• When removing each board, remove the connectors as required. Taking notes of the connecting points (connector numbers)
makes service procedure manageable.

• Make sure that there is no bent or stain on the connectors before inserting, and firmly insert the connectors.

• Wait until the LAMP UNIT has cool down is completely.

• While not in repair service, place the chassis back its original position.

3.1.1 FRONT SIDE DISASSEMBLY

3.1.1.1 REMOVING THE SPEAKER GRILL (Fig.1)

(1) Remove the 4 screws [A].
(2) Remove the 2 claws under the SPEAKER GRILL.
(3) Remove the SPEAKER GRILL by pressing it downward.

3.1.1.2 REMOVING THE FRONT LED PWB (Fig.1)

• Remove the SPEAKER GRILL.
(1) Remove the 3 screws [B].
(2) Remove the FRONT LED PWB.

3.1.1.3 REMOVING THE CENTER COVER (Fig.1)

• Remove the SPEAKER GRILL.
(1) Remove the 2 screws [C].
(2) Remove the CENTER COVER.

3.1.1.5 REMOVING THE SCREEN ASS'Y (Fig.1)

• Remove the SPEAKER GRILL.

• Remove the FRONT PANEL with SCREEN ASS'Y.
(1) Remove the 10 screws [F].
(2) Remove the 8 screws [G].
(3) Remove the SCREEN BRACKET.
(4) Remove the SCREEN ASS'Y from the FRONT PANEL

NOTE:

• When replacing the SCREEN ASS'Y, confirm each

SPACER is fit on the SCREEN BRACKET and the FRONT
PANEL without fail.

• Do not touch the front of the SCREEN ASS'Y.

• Do not shock the SCREEN ASS'Y.

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

recommended for removal and reassemble.

3.1.1.4 REMOVING THE FRONT PANEL WITH SCREEN
ASS'Y (Fig.1)

• Remove the SPEAKER GRILL.

(1) Remove the 8 screws [D].
(2) Remove the 10 screws [E].
(3) Remove the FRONT PANEL with SCREEN ASS'Y.

CAUTION:

• Place the FRONT PANEL with SCREEN ASS'Y on a flat

table without fail.

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

recommended for removal and reassemble.

• Use care not to scratch the screen during work.

• Do not leave the FRONT PANEL with SCREEN ASS'Y

removed for long time to prevent soiling from dust.

3.1.1.6 REMOVING THE SPEAKER (Fig.1)

• Remove the SPEAKER GRILL.

• Remove the FRONT PANEL with SCREEN ASS'Y.
(1) Remove the 4 screws [H].
(2) Remove the SPEAKER.
(3) Remove the opposite SPEAKER by the same method.

1-10 (No.YA409)

CENTER

COVER

E

C

G

FRONT PANEL

SPACER

SPACER

SPEAKER

H

FRONT LED

PWB

SPACER

F

SPACER

A

SCREEN
BRACKET

SPACER

G

F

G

F

F

SPACER

G

SCREEN
BRACKET

SCREEN

D

B

SPACER

A

ASS'Y

FRONT

CLAW

SPEAKER

H

SPEAKER GRILL

Fig.1

(No.YA409)1-11