JVC AV-28X5, AV-32X5 Schematic

SERVICE MANUAL

COLOUR TELEVISION

YA26220054

AV-28X5BU, AV-28X5SU, AV-32X5BU, AV-32X5SU

BASIC CHASSIS

ML2

1 2 3

4 5 6

7 8 9

TV OK

F .T

/ L

TABLE OF CONTENTS

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

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

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

No.YA262

2005/4

SPECIFICATION

Contents

Items

Dimensions ( W × H × D ) 76.2 cm × 52.8 cm × 49.3 cm 86.4 cm × 58.7 cm × 55.0 cm

Mass 39.0 kg 53.0 kg

TV RF System CCIR (B/G, I, D/K, L)

Colour System PAL

SECAM NTSC3.58 / NTSC4.43 (Only EXT mode)

Stereo System A2 (B/G, D/K) / NICAM (B/G, I, D/K, L)

Receiving Frequency

French CATV 116 MHz - 172 MHz

Intermediate Frequency

Colour Sub Carrier Frequency

Teletext System TOP (German system)

Power Input AC220 V - AC240 V, 50 Hz

Power Consumption 120 W, Standby : 2.5 W 130 W, Standby : 2.5 W

Picture Tube Visible size : 66 cm [measured diagonally]

High Voltage 31.0 kV (+1 kV / -1.5 kV) (at zero beam current)

Speaker 13 cm × 6.5 cm oval type × 2

Audio Power Output 10 W + 10 W

Aerial Input Terminal 75 Ω unbalanced, coaxial EXT-1 / EXT-2 / EXT-3 (Input / Output) 21-pin Euro connector (SCART socket × 3)

EXT-4 (Input) S-Video

Audio output 0-1000 mV (rms), Low impedance, RCA pin jack × 2 Headphone Jack 3.5 mm stereo mini jack × 1 Remote Control Unit RM-C64 (AAA/R03 dry cell battery × 2)

VHF 47 MHz - 470 MHz

UHF 470 MHz - 862 MHz

220 MHz - 469 MHz

VIF 38.9 MHz (B/G, I, D/K, L)

SIF 33.4 MHz (5.5 MHz :B/G)

32.9 MHz ( 6.0 MHz:I )

32.4 MHz (6.5 MHz :L, D/K)

PAL 4.43 MHz

SECAM 4.40625 MHz / 4.25 MHz

NTSC 3.58 MHz / 4.43 MHz

FLOF (Fastext) WST (Standard system)

(H : 58.3 cm × V : 33.0 cm)

Mini-Din 4 pin × 1 Y : 1 V(p-p) positive (negative sync, 75Ω) C : 0.3 V(p-p) (Burst signal, 75Ω)

Video

1 V(p-p) 75 Ω, RCA pin jack × 1

Audio (L/R)

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

AV-28X5BU AV-28X5SU

AV-32X5BU AV-32X5SU

Visible size : 76 cm [measured diagonally]

(H : 67.4 cm × V : 38.4 cm)

Design & specifications are subject to change without notice.

1-2 (No.YA262)

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) 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).

(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) 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.

(8) 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.

(9) 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 1000 sensitivity in the following manner. Connect a 1500

Ω per volt or more

Ω

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

GOOD EARTH GROUND

ON EACH EXPOSED ME TAL PAR T

(No.YA262)1-3

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

ZOOM

This function can change the screen size according to the picture aspect ratio.

PICTURE MODE

This function can adjust the picture settings automatically.

3D CINEMA SOUND

You can enjoy sounds with a wider ambience.

2.2 MAIN DIFFERENCE LIST

Item AV-28X5BU AV-28X5SU AV-32X5BU AV-32X5SU

CABINET COLOUR Black Silver Black Silver

MAIN PWB SML-1352A-U2 ← SML-1351A-U2 ← POWER & DEF PWB SML-2352A-U2 ← SML-2351A-U2 ← CRT SOCKET PWB SML-3302A-U2 ← SML-3303A-U2 ←

2.3 21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2/EXT-3

Pin No. Signal designation Matching value EXT-1 EXT-2 EXT-3

1 AUDIO R output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) Not used

2 AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) Used (R3)

3 AUDIO L output 500mV(rms) (Nominal), Low impedance Used (TV OUT) Used (LINE OUT) Not used

4 AUDIO GND Used Used Used

5GND (B) Used Used Used

6 AUDIO L input 500mV(rms) (Nominal), High impedance Used (L1) Used (L2) Used (L3)

7 B input 700mV

FUNCTION SW

(SLOW SW)

9GND (G) Used Used Used

10 SCL / T-V LINK Not used

11 G input 700mV

12 SDA Not used Used (SDA2) Not used

13 GND (R) Used Used Used

14 GND (YS) Used Not used Not used

15 R / C input

16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75

17 GND (VIDEO output) Used Used Used

18 GND (VIDEO input) Used Used Used

19 VIDEO output 1V

20 VIDEO / Y input 1V

21 COMMON GND Used Used Used

Low : 0V-3V High : 8V-12V, High impedance

R : 700mV C : 300mV

(P-P)

, 75Ω Used Used Not used

(B-W)

, 75Ω Used Used Not used

(B-W)

, 75Ω

(B-W)

, 75Ω

(P-P)

(Negative sync), 75Ω Used (TV OUT) Used (LINE OUT) Not used (Negative sync), 75Ω Used Used Used

MOVIE THEATRE

This function displays a cinema film picture more smoothly and naturally on the screen.

DIGITAL VNR

This function cuts down the amount of noise in the original picture.

DigiPure Pro

This function uses the latest in digital technology to give you a natural-looking picture.

Used Used Used

Used

(SCL2 / TV-LINK)

Used (R) Used (C2/R) Used (C3)

Not used

Ω Used Used Not used

(P-P= Peak to Peak, B-W= Blanking to white peak)

[Pin assignment]

20 18 16 14 12 10 8 6 4 2

21 19 17 15 13 11 9 7 5 3 1

1-4 (No.YA262)

2.4 TECHNINAL INFORMATION

2.4.1 MAIN MI-COM (CPU) PIN FUNCTION

Pin name I/O Function

No.

1 TCK I Not used 65 D2 I/O Data bit for PP-RAM/SD-RAM 2 TMS I Not used 66 D12 I/O Data bit for PP-RAM/SD-RAM 3 TDI I Not used 67 D10 I/O Data bit for PP-RAM/SD-RAM 4 TDO O Not used 68 VSS33 -- GND 5 P2.8 I Remote control 69 VDD33 i 3.3V 6 P2.9 I Key scan for front control CH+(On: L) 70 D4 I/O Data bit for PP-RAM/SD-RAM 7 P2.10 I Key scan for front control CH- (On: L) 71 D3 I/O Data bit for PP-RAM/SD-RAM 8 P2.11 I Key scan for front control MENU (On: L) 72 D11 I/O Data bit for PP-RAM/SD-RAM

9 P2.12 I Receive data for TV_LINK 73 RSTIN I Reset for main CPU 10 P2.13 O Power on /off control (ON: L) 74 P3.0 I/O Data for inter IC control bus 11 P2.14 I 12 P2.15 I Main power detection (Normal: H) 76 P3.2 I Remote control 13 VSS33 -- GND 77 P3.3 O Power indication control (On: L) 14 VDD33 i 3.3V 78 P3.4 O Audio muting (Muting: H) 15 P4.5/CS3 O Output data for TV_LINK 79 P3.5 O Audio muting (Muting: H) 16 P4.4/A20 O Address bit for PP-RAM/SD-RAM 80 P3.6 O Not used 17 P4.3/A19 O Address bit for PP-RAM/SD-RAM 81 P3.7 O Not used 18 P4.2/A18 O Address bit for PP-RAM/SD-RAM 82 P3.8 I/O Not used 19 P4.1/A17 O Address bit for PP-RAM/SD-RAM 83 P3.9 I/O Not used 20 VSS25 -- GND 84 VSS33 -- GND 21 VDD25 I 2.5V 85 VDD33 I 3.3V 22 P4.0/A16 O Address bit for PP-RAM/SD-RAM 86 VSS25 -- GND 23 A8 O Address bit for PP-RAM/SD-RAM 87 VDD25 I 2.5V 24 A7 O Address bit for PP-RAM/SD-RAM 88 TXD0 I/O Not used 25 A9 O Address bit for PP-RAM/SD-RAM 89 RXD0 I/O Not used 26 A6 O Address bit for PP-RAM/SD-RAM 90 P3.12 O Not used 27 A5 O Address bit for PP-RAM/SD-RAM 91 P3.13 O Not used 28 A10 O Address bit for PP-RAM/SD-RAM 92 P3.15 O Not used 29 A11 O Address bit for PP-RAM/SD-RAM 93 P5.14 I Not used 30 A12 O Address bit for PP-RAM/SD-RAM 94 P5.15 I Headphone connection detection (Connect: H) 31 VSS33 -- GND 95 TRIG_IN -- Not used 32 VDD33 i 3.3V 96 TRIG_OUT -- Not used 33 A4 O Address bit for PP-RAM/SD-RAM 97 P6.2 O Notifies bus free state (Stop mode: H) 34 A3 O Address bit for PP-RAM/SD-RAM 98 P6.3 O Clock for inter IC control bus 35 A2 O Address bit for PP-RAM/SD-RAM 99 P6.4 I/O Data for inter IC control bus 36 A1 O Address bit for PP-RAM/SD-RAM 100 P6.5 O MSP reset (Reset: H) 37 A0 O Address bit for PP-RAM/SD-RAM 101 P6.6 -- Not used 38 A13 O Address bit for PP-RAM/SD-RAM 102 VSYNC I Vertical sync 39 A14/RAS O Row address strobe for SD-RAM access 103 HSYNC I Horizontal sync 40 A15/CAS O Column address strobe for SD-RAM access 104 COR/RSTOUT O Output for contrast reduction 41 VSS33 -- GND 105 BLANK/CORBLA O Ys for OSD / Teletext (blanking) 42 VDD33 I 3.3V 106 VDD33 I 3.3V 43 MEMCLK O Clock for SD-RAM 107 VSS33 -- GND 44 CSSDRAM O Chip select signal for SD-RAM device 108 XTAL1 I System clock (4MHz) 45 CLKEN O Enable for memory clock 109 XTAL2 O System clock (4MHz) 46 CSROM O Chip select signal for PP-ROM device 110 VSSA -- GND 47 RD O External memory read strobe for PP-ROM 111 VDDA I 2.5V 48 UDQM O Write disable for high byte 112 R O Red for OSD / Teletext 49 LDQM O Write disable for low byte 113 G O Green for OSD / Teletext 50 WR O Memory write strobe 114 B O Blue for OSD / Teletext 51 D15 I/O Data bit for PP-RAM/SD-RAM 115 VSSA -- GND 52 VSS33 -- GND 116 VDDA -- 2.5V 53 VDD33 I 3.3V 117 CVBS2 I Composite video for WSS 54 D7 I/O Data bit for PP-RAM/SD-RAM 118 VSSA -- GND 55 D0 I/O Data bit for PP-RAM/SD-RAM 119 VDDA I 2.5V 56 D14 I/O Data bit for PP-RAM/SD-RAM 120 CVBS1B I Ground for CVBS1A 57 D8 I/O Data bit for PP-RAM/SD-RAM 121 CVBS1A I Composite video for Teletext decorder 58 D6 I/O Data bit for PP-RAM/SD-RAM 122 VSSA -- GND 59 D1 I/O Data bit for PP-RAM/SD-RAM 123 VDDA I 2.5V 60 VSS33 -- GND 124 P5.0 I AFC voltage for tuner 61 VDD33 I 3.3V 125 P5.1 -- Not used 62 D13 I/O Data bit for PP-RAM/SD-RAM 126 P5.2 I AGC voltage for tuner 63 D9 I/O Data bit for PP-RAM/SD-RAM 127 P5.3 -- Not used 64 D5 I/O Data bit for PP-RAM/SD-RAM 128 TMODE I Test mode

X-ray HB LB EW correction Protection detection (Normal: H)

Pin No.

Pin name I/O Function

75 P3.1 I/O Data for inter IC control bus

(No.YA262)1-5

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

3.1.1 REMOVING THE REAR COVER

(1) Remove the 13 screws [A], then withdraw the REAR

COVER toward you.

3.1.2 REMOVING THE SIDE CONTROL JACK ASS'Y

• Remove the REAR COVER. (1) Remove the 1 screw [B] and 2 craw, then remove the SIDE

CONTROL JACK ASS’Y.

3.1.3 REMOVING THE SIDE CONTROL PWB

• Remove the REAR COVER.

• Remove the SIDE CONTROL JACK ASSY. (1) Remove the 2 screws [C], then remove the SIDE

CONTROL PWB.

3.1.4 REMOVING THE CHASSIS BASE

• Remove the REAR COVER. (1) Slightly raise the both sides of the chassis by hand and

remove the 2 claws under the both sides of the CHASSIS BASE from the front cabinet.

(2) Withdraw the CHASSIS backward.

(If necessary, take off the wire clamp, connectors etc.)

3.1.5 REMOVING THE AV TERMINAL BOARD

• Remove the REAR COVER. (1) Remove the 3 screws [D]. (2) Remove the 2 claws under the CHASSIS, then remove the

AV TERMINAL BOARD.

3.1.6 REMOVING THE SPEAKER

• Remove the REAR COVER.

• Remove the SIDE CONTROL JACK ASSY.

• Remove the CHASSIS BASE. (1) Remove the 8 screws [E], then remove the SPEAKER

GRILL. (2) Remove the 2 screws [F], then remove the SPEAKER. (3) Follow the same steps when removing the other hand

MAIN SPEAKER.

3.1.7 CHECKING THE PW BOARD

• To check the back side of the PW Board. (1) Pull out the CHASSIS BASE. (Refer to REMOVING THE

CHASSIS BASE).

(2) Erect the CHASSIS BASE vertically with the HVT side

facing up so that you can easily check the back side of the PW board.

CAUTION:

• When erecting the CHASSIS BASE, 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.

• When conducting a check with power supplied, 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.

1-6 (No.YA262)

SPEAKER GRILL

FRONT CABINET

CRT SOCKET PWB

FRONT CONTROL PWB

CONTROL BASE

SPEAKER

< FRONT SIDE VIEW >

POWER & DEF PWB

MI-COM/100Hz PWB

Claw

SPEAKER

CHASSIS BASE

Claw

SIDE CONTROL PWB

SIDE CONTROL BASE

REAR COVER

Claw

MAIN PWB

AV JACK PWB

AV TERMINAL BOARD

Claw

POWER CORD

Fig.1

(No.YA262)1-7

3.1.9 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. 2).

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

on the CRT change table balanced will as shown in Fig. 2.

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

screwdriver as shown in Fig. 3.

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 cabinet slowly

on cloth (At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 4.

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.2

CRT

Fig.3

APPROX. 35cm

BOX TYPE SCREW DRIVER

CRT

CABINET

CRT CHANGE TABLE

Fig.4

COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.

Subsequent to replacement of the CRT and HV transformer or repair of the anode cap, etc. by dismounting them, be sure to coat silicon grease for electrical insulation as shown in Fig.5.Wipe around the anode button with clean and dry cloth. (Fig.5)Coat silicon grease on the section around the anode button. At this time, take care so that any silicon greases dose not sticks to the anode button. (Fig.6)

Silicon grease product No. KS - 650N

CRT

Anode button

Silicon grease

coating

Approx. 20mm (Do not coat grease on this section

Anode button (No sticking of silicon grease)

Silicon grease should be coated by 5mm or more from the outside diameter of anode cap.

Coating position of silicon grease

1-8 (No.YA262)

Anode cap

Fig.5 Fig.6

3.2 MEMORY IC REPLACEMENT

• This model uses the memory IC.

• This memory IC stores data for proper operation of the video and drive circuits.

• When replacing, be sure to use an IC containing this (initial value) data.

3.2.1 MEMORY IC REPLACEMENT PROCEDURE

1. Power off

Switch off the power and disconnect the power plug from the AC outlet.

2. Replace the memory IC

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

3. Power on

Connect the power plug to the AC outlet and switch on the power.

4. System constant check and setting

* It must not adjust without signal.

(1) Press the [INFORMATION] key and the [MUTING] key

of the REMOTE CONTROL UNIT simultaneously. (2) The SERVICE MENU screen will be displayed (Fig. 1). (3) While the SERVICE MENU is displayed, press the

[INFORMATION] key and [MUTING] key simultaneously,

and the SYSTEM CONSTANT SET screen will be

displayed (Fig. 2). (4) Check the setting values of the SYSTEM CONSTANT

SET. If the value is different, select the setting item with

the [FUNCTION  / ] key, and set the correct value

with the [FUNCTION /] key.

MUTING

(5) Press the [MENU] key to memorize the setting value. (6) Press the [INFORMATION] key twice, and return to the

normal screen.

5. Receiving channel setting

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

6. User settings

INFORMATION

FUNCTION

Check the user setting items according to the given in page later. Where these do not agree, refer to the OPERATING INSTRUCTIONS and set the items as described.

7. SERVICE MODE setting

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

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. STATUS

7. 8. SURROUND

9. SHIPPING (OFF) 0. BUS FREE

1-9 : SELECT

SYSTEM CONSTANT SET

1. DESTINATION EU

- /+ : STORE i : EXIT

1 2 3

4 5 6

7 8 9

TV OK

Fig.1

Fig.2

.T/L

i i : EXIT

FUNCTION

3.2.2 SYSTEM CONSTANT SETTING

Setting item Setting content

AV-28X5BU AV-28X5SU AV-32X5BU AV-32X5SU

Setting value

1.DESTINATION EU / EK / EI EU EU EU EU

2.CRT TYPE 16:9 / 4:3 16:9 16:9 16:9 16:9

3.PICTURE TILT YES / NO YES YES YES YES

4.POWER BASS YES / NO YES YES YES YES

5.SPATIAL SURR YES / NO YES YES YES YES

6.PIC&TEXT YES / NO YES YES YES YES

7.PROGRESSIVE YES / NO YES YES YES YES

(No.YA262)1-9

3.2.3 SETTINGS OF FACTORY SHIPMENT

3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION

Setting item Setting position

POWER Off

CHANNEL PR1

VOLUME 10

3.2.3.3 REMOTE CONTROL MENU OPERATION

(1) PICTURE SETTING

Setting item Setting position

PICTURE MODE BRIGHT

COLOUR TEMP COOL

(2) PICTURE FEATURES

Setting item Setting position

DIGITAL VNR AUTO

DigiPure Pro AUTO

COLOUR SYSTEM TV : According to preset CH

EXT : AUTO

MOVIE THEATRE AUTO

4:3 AUTO ASPECT PANORAMIC

PICTURE TILT Middle

(3) SOUND SETTING

Setting item Setting position

STEREO / I•II Stereo sound BASS Centre TREBLE Centre BALANCE Centre HYPER SOUND OFF

CHANNEL PR1

VOLUME 10

ZOOM PANORAMIC

3D CINEMA SOUND OFF

(5) EXT SETTING

ID BLANK

S-IN BLANK

DUBBING EXT-1 → EXT-2

(6) FEATURES

SLEEP TIMER OFF

CHILD LOCK OFF

BLUE BACK ON

DECODER (EXT-2) OFF

(7) INSTALL

LANGUAGE ENGLISH

AUTO PROGRAM TV channel automatically set

EDIT/MANUAL PRESET CH only

Setting item Setting position

The others : BLANK

(4) 3D CINEMA SOUND

Setting item Setting position

SURROUND MID

BASS BOOST MID

(8) VSM PRESET TABLE

Item

1.CONT -16~+16 +7 0 -3 --- --- ---

2.BRIGHT -16~+16 0 0 0 --- --- ---

3.SHARP -16~+16 0 0 -2 --- --- ---

4.COLOUR -16~+16 0 0 0 --- --- ---

5.HUE -16~+16 0 0 0 --- --- ---

1.WDR R -64~+63 --- --- --- -15 0 +4

2.WDR G -64~+63 --- --- --- -9 0 0

3.WDR B -64~+63 --- --- --- 0 0 0

Variable

range

PICTURE MODE COLOUR TEMP.

BRIGHT STANDARD SOFT COOL NORMAL WARM

Setting value

1-10 (No.YA262)

3.2.4 SERVICE MODE SETING ITEMS

Setting item Setting value Setting item Setting value

1. IF 1. VCO

2. ATT ON/OFF

2. V/C 1.RGB BLK

2.CUTOFF R

3.CUTOFF G

4.CUTOFF B

5.WDR R

6.WDR G

7.WDR B

8.BRIGHT

9.CONTRAST

10.COLOUR

11.HUE

12.SHARP

13.SC ADJ.

14.SIDE.P.L

15.SIDE.P.R

3. AUDIO [Do not adjust]

1.ERR LIMIT

2.A2 ID THR

3.Q-PEAK

4.SOUND LEV

4. DEF 1.V-SHIFT

2.V-SIZE

3.H-CENT

4.H-SIZE

5.TRAPEZ

6.EW-PIN

7.COR-UP

8.COR-LO

9.COR-UP-S

10.COR-LO-S

11.ANGLE

12.BOW

13.V-S.CR

14.V-LIN

5. VSM PRESET BRIGHT/SOFT/STANDARD

1. CONT

2. BRIGHT

3. SHARP

4. COLOUR

5. HUE

COOL/WARM/NORMAL

1. R DRIVE

2. G DRIVE

3. B DRIVE

6. STATUS [Do not adjust]

8.SURROUND [Do not adjust]

9.SHIPPING (OFF) [Do not adjust]

1.SOFT

2.TELETEXT

3.ASPECT

4.PROTECT

5.FLASH

1.CH CONFIG

2.MATRIX

3.REPRODUCTIO

4.CENTRE MODE

5.SPATIAL EFF

6.VIRTUAL EFF

7.BASS EFFECT

8.HARM

9.HPF

10.LPF

11.AMP LIMIT

12.LEVEL ADJU

13.SWC

14.SW HPF

15.VOLUME

16.HYPER EFFE

17.EFFECT MOD

18.HP GAIN

---

(No.YA262)1-11

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.

1-12 (No.YA262)

(4) Then solder leads B and C.

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) There are 2 ways of adjusting this TV : One is with the

REMOTE CONTROL UNIT and the other is the conventional method using adjustment parts and components.

(2) The adjustment using the REMOTE CONTROL UNIT is

made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

(3) Make sure that connection is correctly made AC to AC

power source.

(4) Turn on the power of the TV and measuring instruments for

warming up for at least 30 minutes before starting adjustments.

(5) If the receive or input signal is not specified, use the most

appropriate signal for adjustment.

(6) Never touch the parts (such as variable resistors,

transformers and condensers) not shown in the adjustment items of this service adjustment.

4.2 PRESET SETTING BEFORE ADJUSTMENT

Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT.

Item Preset value

PICTURE MODE STANDARD

CONTRAST / BRIGHT / SHARP / COLOUR / HUE

COLOUR TEMP NORMAL

DIGITAL VNR AUTO

BASS / TREBLE / BALANCE Centre

HYPER SOUND OFF

ZOOM FULL

SLEEP TIMER OFF

Centre

4.3 MEASURING INSTRUMENT AND FIXTURES

(1) DC voltmeter (or digital voltmeter) (2) Oscilloscope (3) Signal generator

(Pattern generator : PAL / SECAM / NTSC)

(4) Remote control unit

4.4 ADJUSTMENT ITEMS

 CHECK ITEM

• B1 VOLTAGE check

• HIGH VOLTAGE check

• IF VCO check

 FOCUS

• FOCUS adjustment

 DEFLECTION CIRCUIT

• V. POSITION adjustment

• V. SIZE adjustment

• H. POSITION adjustment

• H. SIZE adjustment

• SIDE-PIN adjustment

• TRAPEZIUM adjustment

• CORNER adjustment

• ANGLE adjustment

• BOW adjustment

• V. S-SHAPE CORRECTION & V.LINEARITY adjustment

 VIDEO CIRCUIT

• WHITE BALANCE adjustment

• SUB BRIGHT adjustment

• SUB CONTRAST adjustment

• SUB COLOUR adjustment

• SUB HUE adjustment

 VSM PRESET SETTING

• VSM PRESET setting

(No.YA262)1-13

4.5 ADJUSTMENT LOCATIONS

HVT

SIDE CONTROL PWB

FRONT

SPEAKER(R)

SPEAKER(L)

MAIN PWB

TOP

FRONT

CN003

MI-COM 100Hz PWB

CN004

FRONT

CN003

CN004

FRONT CONTROL PWB

POWER CORD

POWER & DEF PWB

FRONT

DEG

DEG COIL

TUNER

AV JACK PWB

CN001

CRT SOCKET PWB

TP-E

CN002

TP-47B

(SOLDER SIDE)

CN005

DEF. YOKE

FOCUS

SCREEN

HVT

1 : TP-91(B1) 2 : NC 3 : X-RAY1 4 : X-RAY2 5 : TP-E

( )

1-14 (No.YA262)

4.6 TOOL OF SERVICE MODE OPERATION

Operate the SERVICE MODE with the REMOTE CONTROL UNIT.

4.6.1 SERVICE MODE ITEMS

With the SERVICE MODE, various adjustment can be made, and they are broadly classified in the following items of settings.

1.IF : This mode adjusts the setting values of the IF circuit.

2.V/C : This mode adjusts the setting values of the VIDEO circuit.

3.AUDIO : This mode adjusts the setting values of the MULTI-SOUND circuit. [Do not adjust]

4.DEF : This mode adjusts the setting values of the DEFLECTION circuit.

5.VSM PRESET : This mode adjusts the setting values of COOL, NORMAL and WARM. (VSM : Video Status Memory)

6.STATUS : This mode is shows the monitor of SOFT, TELETEXT, ASPECT, PROTECT, FLASH. [Do not adjust]

8.SURROUND : This mode adjusts the setting values of the SURROUND circuit. [Do not adjust]

9.SHIPPING (OFF) : This mode is set at shipping. [Do not adjust]

0.BUS FREE : This mode is set at bus free. [Do not adjust]

4.6.2 BASIC OPERATION IN SERVICE MODE

4.6.2.1 HOW TO ENTER THE SERVICE MODE

Press the [INFORMATION] key and [MUTING] key of the REMOTE CONTROL UNIT simultaneously. Then SERVICE MODE screen will be displayed as shown figure.

4.6.2.2 SELECTION OF SUB MENU SCREEN

Press one of the CHANNEL number key with the remote control unit, and select the SUB MENU SCREEN from SERVICE MODE.

1. IF

3. AUDIO

5. VSM PRESET

9.SHIPPING(OFF)

MUTING

INFORMATION

FUNCTION

SERVICE MENU

2. V/C

4. DEF

6. STATUS

8. SURROUND

0.BUS FREE

Fig.1

1 2 3

4 5 6

7 8 9

TV OK

.T/L

FUNCTION

4.6.2.3 SETTING METHOD

 1.IF

[1. VCO] : It must not adjust without signal

(1) [1] key

Select 1.IF.

(2) [1] key

Select 1.VCO. Check the arrow position between the ABOVE REF. and BELOW REF.

(3) [INFORMATION] key

Return to the SERVICE MODE main manu screen.

 2.V/C, 4.DEF and 5.VSM PRESET

(1) [2], [4] and [5]key

Select one from 2.V/C, 4.DEF, 5.VSM PRESET.

(2) [FUNCTION /] key

Select setting items.

(3) [FUNCTION /] key

Set the setting values of the setting items.

(4) [MENU] key

Memorize the setting value. (Before storing the setting values in memory, do not press the CH, TV, POWER ON / OFF key. if you do, the values will not be stored in memory.)

(5) [INFORMATION] key

Return to the SERVICE MODE main manu screen.

 3.AUDIO, 6.STATUS, 8.SURROUND and 9.SHIPPING (OFF)

It is not requirement to adjustment.

Fig.2

4.6.2.4 MEMORIZE THE ADJUSTMENT DATA

When adjustment is completed, press the [MENU] key to memorize the adjustment value. If not to do it, adjustment data is not memorized to the memory IC. And if exit the adjustment mode before memorize the data, the adjustment value which you change is canceled.

4.6.2.5 RELEASE OF SERVICE MODE

After completing the setting, return to the SERVICE MODE, then again press the [INFORMATION] key.

(No.YA262)1-15

4.6.3 SERVICE MODE FLOW CHART

SERVICE MENU

1. IF 2. V/C

3. AUDIO 4. DEF

5. VSM PRESET 6. STATUS

7. 8. SURROUND

9. SHIPPING (OFF) 0. BUS FREE

1-9 : SELECT : EXITi

1. V-SHIFT

2. V-SIZE

3. H-CENT

4. H-SIZE

5. TRAPEZ

6. EW-PIN

7. COR-UP

8. COR-LO

9. COR-UP-S

10. COR-LO-S

11. ANGLE

12.BOW

13.V-S.CR

14.V-LIN

PICTURE MODE

BRIGHT STANDARD SOFT

1. CONT

2. BRIGHT

3. SHARP

4. COLOUR

5.HUE

COLOR TEMP

COOL NORMAL WARM

1. WDR R

2. WDR G

3. WDR B

4. DEF

DEF FULL 100Hz

1. V-SHIFT

- / +

- /

: STORE i : EXIT

5. VSM PRESET

VSM PRESET BRIGHT

1.CONT

: STORE i : EXIT

6. STATUS

STATUS

1.SOFT

: STORE i : EXIT

1.IF(VCO)

IF SERVICE MENU

1. VCO

2. ATT ON/OFF

1-2 : SELECT i : EXIT

2. V/

PAV/C L

1. RGB BLK

- /

Do not adjust Do not adjust

- / +

: STORE i : EXIT

SC DEV

3. AUDIO

AUDIO

1. ERR LIMIT 0010 ERROR LIMIT = C_AD_BITS =

: STORE i : EXIT

1. RGB BLK

2. CUT OFF R

3. CUT OFF G

4. CUT OFF B

5. WDR R

6. WDR G

7. WDR B

8. BRIGHT

1. ERR LIMIT

2. A2 ID THR

3. Q-PEAK

4. SOUND LEV

9. CONT

10. COLOUR

11. HUE

12. SHARP

13. SC ADJ

14. SIDE .P.L

15. SIDE .P.R

1.SOFT

2.TELETEXT

3.ASPECT

4.PROTECT

5.FLASH

1-16 (No.YA262)

1.CH CONFIG

- /

8. SURROUND

SURROUND

: STORE i : EXIT

S:MEDIUM B:MEDIUM

Do not adjust

1.CH CONFIG

2.MATRIX

3.REPRODUCTIO

4.CENTER MODE

5.SPATIAL EFF

6.VIRTUAL EFF

7.BASS EFFECT

8.HARM

9.HPF

10.LPF

11.AMP LIMIT

12.LEVEL ADJU

13.SWC

14.SW HPF

15.VOLUME

16.HYPER EFFE

17.EFFECT MOD

18.HP GAIN

4.7 INITIAL SETTING VALUE OF SERVICE MODE

(1) Adjustment of the SERVICE MODE is made on the basis of the initial setting values. However, the new setting values which

displays on the screen in its optimum condition may differ from the initial setting value. (2) Do not change the initial setting values of the items not listed in “ADJUSTMENT PROCEDURE”. (3) “---” is impossible to adjust or not requirement to adjustment.

4.7.1 [2. V/C]

Setting item

1.RGB BLK --- --- --- --- ---

2.CUTOFF R 0000 - 0255 0100 0100 0100 0100

3.CUTOFF G 0000 - 0255 0132 0132 0132 0132

4.CUTOFF B 0000 - 0255 0124 0124 0124 0124

5.WDR R 0000 - 0255 0165 0165 0165 0165

6.WDR G 0000 - 0255 0135 0135 0135 0135

7.WDR B 0000 - 0255 0150 0150 0150 0150

8.BRIGHT -128 - 0127 -030 -030 -030 -030

9.CONTRAST 0000 - 0063 0040 0040 0040 0040

10.COLOUR 0000 - 0063 0036 0031 0025 [0000]

11.HUE -064 - 0063 --- --- 0002 [0000]

NOTE: [ ] is fixed values.

Setting item

12.SHARP -015 - 0015 [-002] [0000] [-002] [0000] [-002] [0000] [-002] [0000]

NOTE: [ ] is fixed values.

Variable

range

Variable

range

PAL SECAM NTSC 3.58 NTSC 4.43

TV EXT TV EXT TV EXT TV EXT

Initial setting value

Setting item

13.SC ADJ. 0000 - 0063 0018 --- --- ---

Setting item

14.SIDE .P.L 0000 - 1295 343 289 343 289 348 295 348 295

15.SIDE .P.R 0000 - 1295 1089 1142 1089 1142 1103 1155 1103 1155

4.7.2 [3. AUDIO] [Do not adjust]

Setting item

1. ERR LIMIT

2. A2 ID THR

3. Q-PEAK --- ---

4. SOUND LEV --- ---

Variable

range

Variable

range

Variable

range

0000H - 0FF0H

0000H - 00FFH

PAL SECAM NTSC 3.58 NTSC 4.43

REGULAR 14:9 ZOOM REGULAR 14:9 ZOOM REGULAR 14:9 ZOOM REGULAR 14:9 ZOOM

Fixed value

0010H

0019H

Initial setting value

(No.YA262)1-17

4.7.3 [4. DEFLECTION] [AV-28X5BU, AV-28X5SU]

Setting item

1. V-SHIFT -032 - 0031 0000 0000 0000 0000 0000 0000 [0000] [0000]

2. V-SIZE -064 - 0063 -025 0000 0000 0000 0000 0000 [-040] [0000]

3. H-CENT -128 - 0127 -014 0000 0000 0000 0000 0000 [0000] [0000]

4. H-SIZE -128 - 0127 0035 0000 0000 0000 0000 0000 [0000] [0000]

5. TRAPEZ -064 - 0064 -005 0000 0000 0000 0000 0000 [0000] [0000]

6. EW-PIN -128 - 0127 -035 0000 0000 0000 0000 0000 [0000] [0000]

7. COR-UP -064 - 0064 -005 0000 0000 0000 0000 0000 [0000] [0000]

8. COR-LO -064 - 0064 -005 0000 0000 0000 0000 0000 [0000] [0000]

9. COR-UP-S -064 - 0064 0000 0000 0000 0000 0000 0000 [0000] [0000]

10. COR-LO-S -064 - 0064 0000 0000 0000 0000 0000 0000 [0000] [0000]

11.ANGLE -128 - 0127 0000 0000 0000 0000 0000 0000 [0000] [0000]

12.BOW -128 - 0127 0000 0000 0000 0000 0000 0000 [0000] [0000]

13.V-S.CR -064 - 0063 0003 0000 [0005] [0000] [0000] [0000] [0000] [0000]

14.V-LIN -064 - 0063 0000 0000 [-003] [0000] [0000] [0000] [0000] [0000]

NOTE: [ ] is fixed values.

Variable

range

FULL PANORAMIC SUBTITLE COMPRESS

100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p

Initial setting value

4.7.4 [4. DEFLECTION] [AV-32X5BU, AV-32X5SU]

Setting item

1. V-SHIFT -032 - 0031 0000 0000 0000 0000 0000 0000 [0000] [0000]

2. V-SIZE -064 - 0063 -033 0000 0000 0000 0000 0000 [-040] [0000]

3. H-CENT -128 - 0127 -014 0000 0000 0000 0000 0000 [0000] [0000]

4. H-SIZE -128 - 0127 0035 -003 0000 0000 0000 0000 [0000] [0000]

5. TRAPEZ -064 - 0064 -005 0000 0000 0000 0000 0000 [0000] [0000]

6. EW-PIN -128 - 0127 -035 0000 0000 0000 0000 0000 [0000] [0000]

7. COR-UP -064 - 0064 0000 0000 0000 0000 0000 0000 [0000] [0000]

8. COR-LO -064 - 0064 0000 0000 0000 0000 0000 0000 [0000] [0000]

9. COR-UP-S -064 - 0064 0000 0000 0000 0000 0000 0000 [0000] [0000]

10. COR-LO-S -064 - 0064 0000 0000 0000 0000 0000 0000 [0000] [0000]

11.ANGLE -128 - 0127 0000 0000 0000 0000 0000 0000 [0000] [0000]

12.BOW -128 - 0127 0000 0000 0000 0000 0000 0000 [0000] [0000]

13.V-S.CR -064 - 0063 0003 0000 [0005] [0000] [0000] [0000] [0000] [0000]

14.V-LIN -064 - 0063 0000 0000 [0000] [0000] [0000] [0000] [0000] [0000]

NOTE: [ ] is fixed values.

Variable

range

FULL PANORAMIC SUBTITLE COMPRESS

100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p

Initial setting value

1-18 (No.YA262)

4.7.5 [5. VSM PRESET]

Item

1.CONT -16 - +16 +7 0 -3 --- --- ---

2.BRIGHT -16 - +16 0 0 0 --- --- ---

3.SHARP -16 - +16 0 0 -2 --- --- ---

4.COLOUR -16 - +16 0 0 0 --- --- ---

5.HUE -16 - +16 0 0 0 --- --- ---

1.WDR R -64 - +63 --- --- --- -15 0 +4

2.WDR G -64 - +63 --- --- --- -9 0 0

3.WDR B -64 - +63 --- --- --- 0 0 0

4.7.6 [8.SURROUND] [Do not adjust]

Setting item

1.CH CONFIG 0000 - 0001 0001

2.MATRIX 0000 - 0127 0016

3.REPRODUCTIO 0000 - 0015 0006

4.CENTRE MODE 0000 - 0015 0003

5.SPATIAL EFF 0000 - 0127 0058

6.VIRTUAL EFF 0000 - 0127 0052

7.BASS EFFECT 0000 - 0127 0046

8.HARM 0000 - 0127 0000

9.HPF 0002 - 0030 0010

10.LPF 0005 - 0030 0009

11.AMP LIMIT -032 - 0000 -006

12.LEVEL ADJU -128 - 0012 0000

13.SWC 0005 - 0040 0021

14.SW HPF 0000 - 0003 0018

15.VOLUME 0000 - 0003 0003

16.HYPER EFFE 0000 - 0127 0063

17.EFFECT MOD 0000 - 0002 0000

18.HP GAIN 0000 - 0008 0008

Variable

range

Variable

range

PICTURE MODE COLOUR TEMP.

BRIGHT STANDARD SOFT COOL NORMAL WARM

Initial setting value

Setting value

(No.YA262)1-19

4.8 ADJUSTMENT PROCEDURE

4.8.1 CHECK ITEM

Item

B1 VOLTAGE DC voltmeter

Measuring

instrument

X connector

1-pin:TP-91(B1) Remote control unit

HIGH VOLTAGE HV voltmeter

Remote

5-pin:TP-E

[POWER & DEF PWB]

CRT anode

Chassis GND control unit

IF VCO Remote

control unit

IF SERVICE ME

1. VCO

2. ATT ON/OFF

Test point Adjustment part Description

[2.V/C]

1.RGB BLK

(1) Receive the any broadcast. (2) Select 2. V/C from the SERVICE MODE. (3) Select < 1. RGB BLK >. (4) Press the [FUNCTION] key to find the cut off

screen (Black screen).

(5) Connect a DC voltmeter to 1-pin and 5-pin of X

connector. (6) Make sure that the voltage is DC139V ± 2.0V. (7) Press the [FUNCTION] key to return to

SERVICE MODE.

[2.V/C]

1.RGB BLK

(1) Receive the any broadcast. (2) Select 2. V/C from the SERVICE MODE. (3) Select < 1. RGB BLK >. (4) Press the [FUNCTION] key to find the cut off

screen (Black screen). (5) Connect the HV voltmeter to CRT ANODE and

chassis GND. (Ground side is connected previously) (6) Make sure that the voltage is DC 31.0kV (+1kV/-1.5kV). (7) Press the [FUNCTION] key to return to

SERVICE MODE.

NOTE:

Remove the probe before removing the earth clip.

[1.IF]

1.VCO

• Under normal conditions, no adjustment is required.

• It must not adjust without broadcast signal. (1) Receive the any broadcast.

VCO( CW)

****

MHz

(2) Select 1.IF from the SERVICE MODE. (3) Select < 1.VCO >.

TOO HIGH ABOVE REF JUST REF BELOW REF TOO LOW

(4) Check the "←" position between the ABOVE REF.

and BELOW REF.

4.8.2 FOCUS

Item

Measuring

instrument

FOCUS Signal

generator

1-20 (No.YA262)

Test point Adjustment part Description

FOCUS VR

[In HVT]

(1) Receive the crosshatch signal. (2) Set the ZOOM mode to FULL. (3) While looking at the screen, adjust the FOCUS VR

to the vertical and horizontal lines will be clear and infine detail.

(4) Make sure that the picture is in focus even when the

screen gets darkened.

HVT

FOCUS

SCREEN

4.8.3 DEFLECTION CIRCUIT

There are 3 aspect modes ( 1.FULL, 2.PANORAMIC, 3.SUBTITLE) of the adjustment. Depending upon the kind of signals ( Vertical frequency 100Hz i / 60Hz p). 100Hz i is a signal that is output to a screen when a 50Hz signal is input to a television set. It is an interlace-scanned picture of 100Hz.

• When the 100Hz FULL mode has been established, the setting of other modes will be done automatically. However, if the

picture quality has not been optimized, adjust each mode again, respectively.

• The adjustment using the remote control unit is made on the basis of the initial setting values.

• The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

• To switch aspect modes, use the [ZOOM] key of the remote controller.

NOTE :

• Do not adjust PANORAMIC & SUBTITLE mode.

• At first the adjustment in 100Hz FULL mode should be done, then the data for the other aspect mode is corrected in the respective value at the same time. And confirm the deflection adjustment initial setting value in 60Hz (NTSC EXT mode) FULL mode. If the adjustment in 100Hz each aspect mode has been done and stored, the data for the same aspect modes in 60Hz is corrected in the respective value. Only the data for the other aspect mode in 60Hz is corrected for itself.

Item

Measuring instrument

V. POSITION Signal

generator

Remote control unit

V. SIZE Signal

generator

Remote control unit

Vertical

screen

size

Test point Adjustment part Description

[4.DEF]

1.V- SHIFT

(1) Receive the circle pattern signal of vertical frequency

50Hz (PAL). (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MODE. (4) Set the initial setting value of < 1.V-SHIFT >. (5) Adjust vertical position to make A = B.

(A)

(6) Check the adjustment value above in other zoom

mode. If it is a wrong adjustment, readjust in FULL

mode and adjust by < 1.V-SHIFT >. (7) Press the [MENU] key to memorize the set value.

(B)

[4.DEF]

2.V-SIZE

(1) Receive the cross hatch signal. (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MODE. (4) Set the initial setting value of < 2.V-SIZE >. (5) Adjust to make sure that the vertical screen size of

the picture size is in the bellow table. (6) Make sure that the vertical screen size of the each

ASPECT mode is in the below table. (7) Press the [MENU] key to memorize the set value. (8) Input a NTSC VIDEO signal (60Hz) from the EXT

Picture

size

100%

terminal, and make sure that the vertical screen

size is in the table below.

(9)

ASPECT MODE FULL

PANORAMIC

SUBTITLE

SCREEN TOP

SCREEN BOTTOM

93%

87%

(No.YA262)1-21

70%

83%

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