JVC AV-27FA54/ASA, AV-27FA54/AZA, AV-32FA54/AYA, AV-32FA54/AZA, AV-36FA54/AYA Service Manual

SERVICE MANUAL

COLOR TELEVISION

5211520036

AV-27FA54/ASA, AV-27FA54/AZA, AV-32FA54 AV-36FA54

PIP

EZ SURF CHANNEL ON/MOVE

SOURCEINPUT FREEZESWAP

SOUND

ASPECT

LIGHT

C.C.

RM-C1250G

/AYA, AV-32FA54/AZA,

/AYA

BASIC CHASSIS

GJ2

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39

No.52115

2003/6

SPECIFICATION

Items

Dimensions (W × H × D)

Mass 43.0kg (94.6Ibs) 64.0kg (140.8Ibs) 85.0kg (187.0Ibs) TV RF System CCIR(M) Color System NTSC Sound System BTSC (Multi Channel Sound) TV Receiving Channels

and Frequency

TV / CATV Total Channel 180 Channels Intermediate Frequency Video IF Carrier 45.75 MHz

Color Sub Carrier 3.58 MHz Power Input AC120V , 60Hz Power Consumption 140W 160W ← Picture Tube (Visible size) 68cm (27”)

High Voltage 30.0kV ±1.3kV 31.4kV ±1.3kV ← Speaker 6.5cm × 13cm (2-1/2" × 5"), Oval type × 2 Audio Power Output 10W + 10W Antenna Terminal (VHF / UHF) F-type connector, 75 Ω unbalanced Input1 (Rear) Video 1V(p-p), negative sync, 75 Ω, RCA pin jack × 1

Input2 (Rear) Video 1V(p-p), negative sync, 75 Ω, RCA pin jack × 1

Component Video Y : 1V(p-p), negative sync, 75 Ω, RCA pin jack × 1

Input3 (Front) Video 1V(p-p), negative sync, 75 Ω, RCA pin jack × 1

Input4 (Rear) Component Video Y : 1V(p-p), negative sync, 75 Ω, RCA pin jack × 1

Subwoofer Output (Audio) More than 0 to 1000mV (rms)(+2.2dBs), low impedance, RCA pin jack × 1 Audio Output (Fix) 500mV(rms)(-4dBs), low Impedance, (400kHz when modulated 100%),

AV COMPULINK lll 3.5mm mini jack × 1 Remote Control Unit RM-C1251G (AA/R6/UM-3 battery × 2)

Design & specifications are subject to change without notice.

VHF LOW 02ch~06ch : 54MHz~88MHz

VHF HIGH 07ch~13ch : 174MHz~216MHz

UHF 14ch~69ch : 470MHz~806MHz

CATV 54MHz~804MHz

Sound IF Carrier 41.25 MHz (4.5MHz)

S-video Mini DIN 4-pin × 1

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

AV-27FA54 AV-32FA54 AV-36FA54

82.9 cm × 59.3 cm × 51.9cm (32-3/4" × 23-3/8" × 20-1/2")

Low Band : 02~06, A-8 by 02~06&01 High Band : 07~13 by 07~13 Mid Band : A~I by 14~22 Super Band : J~W by 23~36 Hyper Band : W+1~W+28 by 37~64 Ultra Band : W+29~W+84 by 65~125 Sub Mid Band : A8, A4~A1 by 01, 96~99

Measured diagonally

(H : 54.4cm × W : 41.8cm)

Y : 1V(p-p), negative sync, 75 Ω C : 0.286V(p-p)(burst signal), 75 Ω

Pb/Pr : 0.7V(p-p), 75 Ω, RCA pin jack × 2

RCA pin jack × 2

93.9 cm × 68.5 cm × 57.0cm

(H : 65.6cm × W : 49.6cm)

Contents

(37" × 27" × 22-1/2")

80cm (32”)

Measured diagonally

102.3 cm × 75.6 cm × 61.3cm (40-3/8" × 29-7/8" × 24-1/4")

90cm (36”)

Measured diagonally

(H : 74.0cm × W : 55.9cm)

1-2 (No.52115)

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 cir cuitry of the pr oducts shou ld n ot 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 me chanical 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 w hich 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 part s 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 (NEU-

TRAL) 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 L IVE : ( ) 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 measu re 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.

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

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

(7) 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.

(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 lea d 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 fo r 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 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 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

PLACE THIS PROBE

1500 10W

(11) High voltage hold down circuit check.

GOOD EARTH GROUND

ON EACH EXPOSED METAL PART

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

POWER CORD REPLACEMENT WARNING.

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

PWB

White line side

WHT

(No.52115)1-3

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

• New chassis (GJ2) design enables use of a single board with simplified circuitry.

• Users can make fun to connect the DVD player with the component video signal input terminal.

• Provided with miniature tuner (TV/CATV).

• Multifunctional remote control permits picture adjustment.

• Adoption of the CHANNEL GUARD function prevents the specific channels from being selected, unless the "ID number" is key in.

C bus control utilizes single chip ICs.

•I

• Adoption of the VIDEO STATUS / THEATER PRO. function.

• Adoption of the ON/OFF TIMER and SLEEP TIMER function.

• Built-in V-CHIP system.

2.2 HOW TO IDENTIFY MODELS

How to recognize from the appearance of the model concerned is written below. Please distinguish from several contents currently printed on the rating label.

• Closed-caption broadcasts can be viewed.

• Built-in AHS (Advanced Hyper Surround) system.

• S-VIDEO input terminal for taking best advantage of Super VHS.

• Digital Comb filter Improved picture quality.

• Adoption of the ASPECT MODE (4:3/ 16:9) function.

• By pushing the EZ SURF key, Back Program Information can be displayed in written from program Information uses a CALL LETTER (broadcasting station ID), a Network name and a Program name of XDS data, and collectÅfs tuning of the tuner for PIP one by one.

• Two programs can be displayed on the screen by the 2 tuners PIP circuit.

MODEL NAME

AC 120V 60Hz

MODEL NO.

TV SCREEN SIZE : DIAGONAL

CHASSIS NO. MANUFACTURED SERIAL NO.

INCHES

VIDEO EQUIPMENT

4C43

AV-27FA54 or AV-32FA54 or AV-36FA54

DISTINGUISH NAME

ASA or AZA or AYA

1-4 (No.52115)

2.3 TECHNINAL INFORMATION

2.3.1 SYSTEM BLOCK DIAGRAM

REMOCON

RECEIVER

IC702

MEMORY

SCL0 SDA0

IC5001

MTS

TONE/VOL

SCL1

SDA1

SCL0 SDA0 SCL0 SDA0

IC5501

LATCH& AV SW

2.3.2 MAIN MI-COM (CPU) PIN FUNCTION

Pin name

No.

AFT2

AFT1

KEY

uP DVss

Reset

Xout

Xin

TEST

uP_DVDD

AGC_MUTE

UP_VVss

TV_HGND

FBP_SCP

Hout

H_Vcc_9V

HAFC_1

Vsaw

Vout

EW_out

Xray

Cb_input

Y_input

Cr_input

DVcc_3.3V

V3in/Cin

EHT_in

V2in/Y

I/O

AFT voltage for sub tuner (Tuning frequency control)

AFT voltage for main tuner (Tuning frequency control)

Key scan for front control [No signal : H]

GND

CPU reset

CPU system clock : 8MHz oscillation

GND

AGC muting for main tuner (when channel select) [Muting : H]

GND

Flyback pulse (H. pulse)

H. drive (oscillation)

9V (for H. oscillation start)

H. AFC filter

V. saw filter

V. drive

Parabola waveform (for sidepin correection)

X-ray detection (for protection) [Detection : H]

PIP area pulse [sub picture on:H]

Cb(external) /B-Y(PIP) signal

Y signal (external /PIP)

Cr(external) /R-Y(PIP) signal

3.3V

Chroma signal (for YC separation output)

Not used

Y signal (for YC separation output)

Function

IC201

MAIN MI-COM / VIDEO PROCESS / DEF. PROCESS

SCL0 SDA0

IC5201

3-LINE YC SEP.

AFT1

AFT2

SCL0 SDA0

TU001

MAIN TUNER

Pin name

No.

YCD_GND

Vin1

ABCL

Monitor

Black_Det

SVM_out

APL_Fil

APC_Fil

3.58MHz

YC_Vcc_5V

R_out

G_out

B_out

RGB_Vcc_9V

IK in

TV_DGND

uP_MPAGND

uP_MPAVDD

MAIN_POWER

HAZARD

SDAO

SCLO

SDA1

AGC ADJUST

SCL1

LED

REMOCON

COMPULINK

IC101

MAIN IF DET

IC4101

SUB IF DET

TU4001

SUB TUNER

SCL0 SDA0

IC502

D-A CONVERTER

I/O

GND

Not used

Current for automatic beam (brightness)/contrast limit

Clamp pulse (for Component / PIP switch)

Black level detection filter

Y signal for scan velocity modulation

Average picture level filter

Automatc phase control filter

Color sub carrier (3.58MHz) for 3-line digital comb filter [IC5201]

5V (for video process circuit)

R signal

G signal

B signal

9V (for RGB process circuit)

Not used

GND

Power on/off switching control [Powen on : L]

B1 over cuurent / V. amplitude detection (for protect) [Defective : H]

Data for Inter IC control bus (for various devices)

I/O

Clock for Inter IC control bus (for various devices)

Data for Inter IC control bus (for main memory)

I/O

AGC adjustment (for tuner) <S45 in Service menu>

Clock for Inter IC control bus (for main memory)

POWER / ON TIMER LED lndication [lighting : L]

Remote control sensor input [No input : H]

AV COMPULINK lll control [No input : H]

IC4301

PIP CONTROL

SCL0 SDA0

IC5701

EXPANSION

I/O

Function

(No.52115)1-5

2.4 MAIN DIFFERENCE LIST Item

CRT (Picture Tube) Size 27V (Diagonally)

CRT Surface Treatment Crear + Coating Tint Tint Electric Gun Non-DAF DAF DAF High Voltage 30kV±1.3kV 31.4kV±1.3kV 31.4kV±1.3kV Dimensions (W × H × D) "82.9cm × 59.3cm × 51.9cm

(32-3/4" × 23-3/8" × 20-1/2") Mass 43.0 kg (94.6 Ibs) 64.0 kg (140.8 Ibs) 85.0 kg (187.0 Ibs) MAIN PWB ASSY SGJ-1513A-M2 SGJ-1514A-M2 SGJ-1511A-M2 SGJ-1515A-M2 SGJ-1512A-M2 PIP PWB ASSY SGJ-4001A-M2 ←←← ← DAF PWB ASSY --- --- SGJ-2503A-M2 SGJ-2502A-M2 SGJ-2501A-M2 CRT SOCKET PWB ASSY SGJ-3502A-M2 SGJ-3506A-M2 SGJ-3504A-M2 SGJ-3503A-M2 SGJ-3501A-M2 FRONT CONTROL

PWB ASSY PICTURE TUBE (ITC) A68QCP893X003 DEG COIL QQW0090-001 ← QQW0107-001 QQW0176-001 QQW0122-001 FRONT CABINET ASSY LC11556-001C-A ← LC11531-001B-A ← LC11557-001B-A REAR COVER LC11555-001C-A ← LC11533-001C-A ← LC11559-001C-A

SGJ-6501A-M2 ← SGJ-6502A-M2 ← SGJ-6503A-M2

AV-27FA54 AV-32FA54 AV-36FA54

ASA AZA AYA AZA AYA

(H:55.4cm × W:41.8cm)

A68QCU754X62N

32V (Diagonally)

(H:65.6cm × W:49.6cm)

"93.9cm × 68.5cm × 57.0cm

(37" × 27" × 22-1/2")

A80AJZ90X03 A80ERF042X17 A90AJZ90X02

36V (Diagonally)

(H:74.0cm × W:55.9cm)

"102.3cm × 75.6cm × 61.3cm

(40-3/8"

29-7/8" × 24-1/4")

1-6 (No.52115)

2.5 FUNCTIONS  FRONT PANEL CONTROL

VIDEO L / MONO - AUDIO - R

INPUT-3 TERMINAL

VIDEO

AUDIO L/MONO

AUDIO R

 REAR TERMINAL

INPUT- 3

432 1

OPERATE

VOLUMECHANNEL

MENU( ) button

OPERATE( / ) button (for MENU)

CHANNEL(-/+) buttons

VOLUME(-/+) buttons

REMOTE CONTROL SENSOR

POWER ON/ ON TIMER INDICATOR

POWER SW button

ON TIMER

A B

POWER

INPUT-2 TERMINAL

VIDEO

AUDIO L/MONO

AUDIO R

COMPONENT-Y

COMPONENT-P

b r

13 14 19

INPUT-1 TERMINAL

S-VIDEO

VIDEO

AUDIO L/MONO

AUDIO R

INPUT-4 TERMINAL

AUDIO L/MONO

AUDIO R

COMPONENT-Y

1518

810

COMPONENT-P

COMPONENT-Pr

AUDIO OUTPUT TERMINAL (Fixed)

AUDIO L

AUDIO R

AV COMPULINK TERMINAL

ANTENNA TERMINAL 75 (VHF/UHF)

SUBWOOFER OUT

(No.52115)1-7

 REMOTE CONTROL UNIT

POWER key

EZ SURF key:

EZ SURF CHANNEL ON/MOVE

SOUND

PIP

SOURCEINPUT FREEZE SWAP

ASPECT

RM-C1250G

LIGHT

C.C.

INPUT key:

DISPLAY key

SLEEP TIMER key:

SOUND key:

VIDEO STATUS key:

THEATER PRO key

ASPECT key:

MUTING key

VOL+/- & VOL /

MENU key

PIP CONTROL key:

CHANNEL NUMBER keys

RETURN+ key

100+ key

LIGHT key

C.C.

(CLOSED CAPTION)

Back program can be displayed

TV VIDEO1 VIDO2 V2-COMPONENT VIDEO3 VIDEO4

0 15 30 165 180

AHS and BBE ON/OFF can be displayed

STANDARD DYNAMIC THEATER GAME

Can be changed to 4:3 and 16:9 screen

(for SERVICE MENU)

(ON/MOVE, CHANNEL, SWAP, FREEZE and SOURCE keys)

Press the ON/MOVE key; PIP screen can be dispalyed

OFF CAPTION TEXT

key:

keys

CH+/- & CH /

EXIT key

VCR CONTROL key

VCR / DVD switch

TV / CATV switch

NOTE

The CH+/- keys and VOL+/- keys operate CHANNEL and VOLUME normally. These keys are also used to navigate SERVICE MENU as the CH / and VOL / keys.

(for SERVICE MENU)

keys

1-8 (No.52115)

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

3.1.1 REMOVING THE REAR COVER

(1) Disconnect the power plug from wall outlet. (2) As shown in the Fig.1, remove the 11 screws [A]. (3) Withdraw the REAR COVER backward.

3.1.2 REMOVING THE AV TERMINAL BOARD

• Remove the REAR COVER. (1) As shown in Fig.1, remove the 6 screws [B]. (2) Withdraw the AV TERMINAL BOARD toward you.

3.1.3 REMOVING THE CHASSIS

• Remove the REAR COVER.

• Remove the AV TERMINAL BOARD. (1) Slightly raise the both sides of CHASSIS by hand. (2) Remove the 2 claws under the both side of the CHASSIS

from the front cabinet.

(3) Withdraw the CHASSIS backward.

(If necessary, remove the wire clamp, connectors etc.)

3.1.7 CHECKING THE CHASSIS

To check the PW Board from back side.

(1) Pull out the CHASSIS (refer to REMOVING THE CHASSIS). (2) Erect the CHASSIS vertically so that you can easily check

the back side of the PW Board.

CAUTION :

• When erecting the CHASSIS, be careful so that there will be no contacting with other PW Board.

• Before turning on power, make sure that the wire connector is properly connected.

• Wh en co nduc tin g a che ck with pow er su ppli ed, be sure

to confirm that the CRT EARTH WIRE (BRAIDED ASS'Y) is connected to the CRT SOCKET PWB.

3.1.8 WIRE CLAMPING AND CABLE TYING

(1) Be sure to clamp the wire. (2) Never remove the cable tie used for tying the wires together.

Should it be inadvertently removed, be sure to tie the wires with a new cable tie.

3.1.4 REMOVING THE SPEAKER

• Remove the REAR COVER. (1) As shown in Fig.1, remove the 2 screws [C]. (2) Remove the 4 screws [D] and taking out the SPEAKER. (3) Follow the same steps when removing the other hand

SPEAKER.

NOTE :

When remove the 2 screws [C] of the SPEAKER, taking out the lower side screw first, and then takeing out the upper one.

3.1.5 REMOVING THE LED & POWER SW PWB

• Remove the REAR COVER. (1) Remove the 2 screws [E] as shown in Fig.1. (2) Withdraw the LED & POWER SW PWB toward you.

*If necessary, remove the wire clamp, connector etc.

3.1.6 REMOVING THE FRONT CONTROL PWB

• Remove the REAR COVER. (1) Remove the 2 screws [F] as shown in Fig.1. (2) Withdraw the FRONT CONTROL PWB toward you.

*If necessary, remove the wire clamp, connector etc.

(No.52115)1-9

FRONT CABINET

LED&POWER SW PWB

CRT SOCKET PWB

FRONT CONTROL PWB

SPEAKER

SPACER

MAIN PWB

CLAW

SPEAKER HOLDER

DAF PWB

HVT

REAR COVER

CLAW

AV SELECTOR PWB

TUNER

PIP PWB

POWER CORD

AV TERMINAL BOARD

1-10 (No.52115)

NOTE This exploded view describes about the AV-36FA54. You can use the exploded view for disassembling the AV-27FA54 / AV-32FA54 in the same step as for this one.

Fig.1

3.2 REMOVING THE CRT

NOTE:

• Replacement of the CRT should be performed by 2 or more

persons.

• After removing the REAR COVER, CHASSIS etc., (1) Putting the CRT change table on soft cloth, the CRT

change table should also be covered with such soft cloth (shown in Fig. 3).

(2) While keeping the surface of CRT down, mount the TV set

on the CRT change table balanced will as shown in Fig. 3.

(3) Remove 4 screws marked by arrows with a box type

screwdriver as shown in Fig. 4.

NOTE:

Since the cabinet will drop when screws have been removed, be sure to support the cabinet with hands.

(4) After 4 screws have been removed, put the ca binet sl owly

on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 5.

NOTE:

• The CRT should be assembled according to the opposite sequence of its dismounting steps.

• The CRT change table should preferably be smaller that the CRT surface, and its height be about 35cm.

CRT CHANGE TABLE

CLOTH

CRT CHANGE TABLE

Fig.3

CRT

Fig.4

APPROX. 35cm

BOX TYPE SCREW DRIVER

 FOR AV-32FA54/AZA model only

CAUTION FOR DEGAUSSING WORKS

Whenever degaussing works are required due to distorted images and colors caused by the replacement of the CRT or other external magnetic forces, self-degaussing (internal degaussing) should be carried out without fail instead of degaussing the monitor from the outside. Because of the characteristics of the CRT used in this monitor , the distorted images and colors may worsen if degaussing the monitor from the outside has been performed. Even if external degaussing works have been carried out, self-degaussing should be performed by turning the power on the monitor. When you want to perform self-degaussing of the monitor whose power is already turned on, turn of f the power and wait for about 10 minutes before turning the power on the monitor again for self-degaussing.

CABINET

CRT

CRT CHANGE T ABLE

Fig.5

(No.52115)1-11

3.3 MEMORY IC REPLACEMENT

3.3.1 MEMORY IC

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

3.3.2 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

Be sure to use a memory IC written with the initial setting data.

3. Power on

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

4. Confirm the system constant value

• 12.SYSTEM (SYS) do not adjust normally.

• The adjustment should not be done without signal.

 How to enter the SERVICE MENU.

• 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. (1) Press the [SLEEP TIMER] key and set SLEEP TIMER

for "0 min".

(2) Before disappear the display of SLEEP TIMER set-

tings, simultaneously press the [DISPLAY] key and [VIDEO STATUS] key of the remote control unit.

(3) The SERVICE MENU screen will be displayed as

shown Fig.1.

 How to enter the 12. SYSTEM(SYS).

(1) While the SERVICE MENU is displayed, select the

12.SYSTEM(SYS) item with [CH/] keys, and the [VOL/] keys is pressed, the screen will be displayed as shown in Fig.2.

(2) Refer to the "12.SYSTEM(SYS)" table and check the

setting items. If the value is different, select the setting item with the [CH/] keys and adjust the setting with the [VOL/] keys. (The letters of the selected item are displayed in yellow.)

(3) When adjustment has completed, the values store into

memory IC automatically.

(4) Press the [EXIT] key to return the SERVICE MENU

screen.

(5) Then press the [EXIT] key again to return the no rmal

screen.

5. Receiving 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 the "FACTRY SETTING VALUE" table. Where these do not agree, refer to the OPERATING INSTRUCTIONS (USER'S GUIDE) and set the items as described.

7. SERVICE MENU setting

Verify what to set in the SERVICE MENU, and set whatever is necessary(Fig.1) . Refer to the SERVICE ADJUSTMENT for setting.

SERVICE MENU

SERV ICE MENU

V/C(S)

SOUND(A)

PIP(PIP)

LOW LIGHT

RF AFC

11.

I2C BUS

SELECT BY OPERATE BY

SYSTEM (SYS) MODE

SYS01 VIDEO IN

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

DISPLAY &

VIDEO STATUS key

VOL / key

CH / key

DEF(D)

OTHERS(F)

3L Y/C(LYC)

HIGH LIGHT

10.

VOC

12.

SYSTEM(SYS)

EXIT BY

Fig.1

Fig.2

SLEEP TIMER key

SOUND

ASPECT

EXIT

LIGHT

C.C.

EXIT key

[RM-C1250G]

1-12 (No.52115)

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