JVC AV-28X5BU User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.YA262
2005/4
COLOUR TELEVISION
YA26220054
AV-28X5BU, AV-28X5SU,
AV-32X5BU, AV-32X5SU
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
BASIC CHASSIS
ML2
1 2 3
4 5 6
7 8 9
0
P
AV
TV OK
MENU
P
F
.T/L
TV

1-2 (No.YA262)
SPECIFICATION
Design & specifications are subject to change without notice.
Items
Contents
AV-28X5BU
AV-28X5SU
AV-32X5BU
AV-32X5SU
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
VHF 47 MHz - 470 MHz
UHF 470 MHz - 862 MHz
French CATV 116 MHz - 172 MHz
220 MHz - 469 MHz
Intermediate
Frequency
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)
Colour Sub
Carrier Frequency
PAL 4.43 MHz
SECAM 4.40625 MHz / 4.25 MHz
NTSC 3.58 MHz / 4.43 MHz
Teletext System TOP (German system)
FLOF (Fastext)
WST (Standard 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]
(H : 58.3 cm ×V : 33.0 cm)
Visible size : 76 cm [measured diagonally]
(H : 67.4 cm ×V : 38.4 cm)
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 Ωunbalanced, coaxial
EXT-1 / EXT-2 / EXT-3 (Input / Output) 21-pin Euro connector (SCART socket ×3)
EXT-4 (Input) S-Video
Video
Audio (L/R)
Mini-Din 4 pin ×1
Y : 1 V(p-p) positive (negative sync, 75Ω)
C : 0.3 V(p-p) (Burst signal, 75Ω)
1 V(p-p) 75 Ω, RCA pin jack ×1
500 mV(rms) (-4 dBs), High impedance, RCA pin jack ×2
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)

(No.YA262)1-3
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 1000Ωper 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)
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
1500 10W
0.15 F AC-TYPE
GOOD EARTH GROUND

1-4 (No.YA262)
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.
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.
2.2 MAIN DIFFERENCE LIST
2.3 21-PIN EURO CONNECTOR (SCART) : EXT-1/EXT-2/EXT-3
(P-P= Peak to Peak, B-W= Blanking to white peak)
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 ←
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(B-W), 75ΩUsed Used Not used
8FUNCTION SW
(SLOW SW)
Low : 0V-3V
High : 8V-12V, High impedance Used Used Used
9GND(G) Used Used Used
10 SCL / T-V LINK Not used Used
(SCL2 / TV-LINK) Not used
11 G input 700mV(B-W), 75ΩUsed Used Not used
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 R : 700mV(B-W), 75Ω
C : 300mV(P-P), 75ΩUsed (R) Used (C2/R) Used (C3)
16 Ys input (FAST SW) Low : 0V-0.4V, High : 1V-3V, 75ΩUsed Used Not used
17 GND (VIDEO output) Used Used Used
18 GND (VIDEO input) Used Used Used
19 VIDEO output 1V(P-P) (Negative sync), 75ΩUsed (TV OUT) Used (LINE OUT) Not used
20 VIDEO / Y input 1V(P-P) (Negative sync), 75ΩUsed Used Used
21 COMMON GND Used Used Used
20 18 16 14 12 10 8 6 4 2
21 19 17 15 13 11 9 7 5 3 1
[Pin assignment]

(No.YA262)1-5
2.4 TECHNINAL INFORMATION
2.4.1 MAIN MI-COM (CPU) PIN FUNCTION
Pin
No. Pin name I/O Function Pin No. Pin name I/O Function
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
X-ray HB LB EW correction Protection detection (Normal: H) 75 P3.1 I/O Data for inter IC control bus
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

1-6 (No.YA262)
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.

(No.YA262)1-7
Fig.1
CONTROL BASE
FRONT CONTROL PWB
MAIN PWB
CHASSIS BASE
AV JACK PWB
POWER CORD
POWER & DEF PWB
AV TERMINAL
BOARD
Claw
Claw
Claw
Claw
REAR COVER
SIDE CONTROL BASE
SIDE CONTROL PWB
CRT SOCKET PWB
A
B
C
D
E
FF
F
F
SPEAKER
SPEAKER
MI-COM/100Hz PWB
FRONT CABINET
SPEAKER GRILL
< FRONT SIDE VIEW >

1-8 (No.YA262)
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.
Fig.2
Fig.3
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
Fig.5 Fig.6
CRT CHANGE TABLE
APPROX.
35cm
CLOTH
CRT
BOX
TYPE
SCREW
DRIVER
CRT
CHANGE
TABLE
CRT
CHANGE TABLE
CRT
CABINET
Anode button
CRT
Silicon grease
coating
Silicon grease
should be coated
by 5mm or more
from the outside
diameter of anode
cap.
Approx.
20mm (Do not
coat grease on
this section
Anode button
(No sticking of
silicon grease)
Anode cap
Coating position
of silicon grease

(No.YA262)1-9
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.
(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
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.
Fig.1
Fig.2
3.2.2 SYSTEM CONSTANT 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 i
i
: EXIT
SYSTEM CONSTANT SET
1. DESTINATION EU
- /+ : STORE i : EXIT
OK
1 2 3
4 5 6
7 8 9
0
P
AV
TV OK
MENU
P
F
.T/L
TV
INFORMATION
MUTING
MENU
FUNCTION
/
FUNCTION
/
Setting item Setting content Setting value
AV-28X5BU AV-28X5SU AV-32X5BU AV-32X5SU
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

1-10 (No.YA262)
3.2.3 SETTINGS OF FACTORY SHIPMENT
3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION
3.2.3.3 REMOTE CONTROL MENU OPERATION
(1) PICTURE SETTING
(2) PICTURE FEATURES
(3) SOUND SETTING
(4) 3D CINEMA SOUND
(5) EXT SETTING
(6) FEATURES
(7) INSTALL
(8) VSM PRESET TABLE
Setting item Setting position
POWER Off
CHANNEL PR1
VOLUME 10
Setting item Setting position
CHANNEL PR1
VOLUME 10
ZOOM PANORAMIC
3D CINEMA SOUND OFF
Setting item Setting position
PICTURE MODE BRIGHT
COLOUR TEMP COOL
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
Setting item Setting position
STEREO / I•II Stereo sound
BASS Centre
TREBLE Centre
BALANCE Centre
HYPER SOUND OFF
Setting item Setting position
SURROUND MID
BASS BOOST MID
Setting item Setting position
ID BLANK
S-IN BLANK
DUBBING EXT-1 →EXT-2
Setting item Setting position
SLEEP TIMER OFF
CHILD LOCK OFF
BLUE BACK ON
DECODER (EXT-2) OFF
Setting item Setting position
LANGUAGE ENGLISH
AUTO PROGRAM TV channel automatically set
EDIT/MANUAL PRESET CH only
The others : BLANK
Item Variable
range
Setting value
PICTURE MODE COLOUR TEMP.
BRIGHT STANDARD SOFT COOL NORMAL WARM
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

(No.YA262)1-11
3.2.4 SERVICE MODE SETING ITEMS
Setting item Setting value Setting item Setting value
1. IF 1. VCO
2. ATT ON/OFF
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
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
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
3. AUDIO
[Do not adjust]
1.ERR LIMIT
2.A2 ID THR
3.Q-PEAK
4.SOUND LEV
6. STATUS
[Do not adjust]
1.SOFT
2.TELETEXT
3.ASPECT
4.PROTECT
5.FLASH
8.SURROUND
[Do not adjust]
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
9.SHIPPING (OFF)
[Do not adjust]
---

1-12 (No.YA262)
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
[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.
(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.
2. How to install Chip parts
[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 Aas indicated in the figure.
(4) Then solder leads Band C.
SOLDER SOLDER
A
B
C
A
B
C

(No.YA262)1-13
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.
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
Item Preset value
PICTURE MODE STANDARD
CONTRAST / BRIGHT / SHARP / COLOUR / HUE Centre
COLOUR TEMP NORMAL
DIGITAL VNR AUTO
BASS / TREBLE / BALANCE Centre
HYPER SOUND OFF
ZOOM FULL
SLEEP TIMER OFF

1-14 (No.YA262)
4.5 ADJUSTMENT LOCATIONS
HVT
HVT
FOCUS
X
K
SL
SR
F
B
R
R
G
K
F
B
W
W
HV
SCREEN
G
CN003
CN004
CN005
CN003
CN004
CN005
MAIN PWB
MI-COM 100Hz PWB
CN001
CN002
AV JACK PWB
POWER & DEF PWB
PW
DEG
TUNER
FRONT
FRONT
FRONT FRONT
TOP
CRT SOCKET PWB (SOLDER SIDE)
FRONT CONTROL PWB
SIDE CONTROL PWB
POWER CORD
1 : TP-91(B1)
2 : NC
3 : X-RAY1
4 : X-RAY2
5 : TP-E ( )
DEF. YOKE
DEG COIL
TP-E TP-47B
1
5
SPEAKER(R)
SPEAKER(L)

(No.YA262)1-15
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.
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.
Fig.1
Fig.2
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.
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.
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.
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]
SERVICE MENU
1. IF
3. AUDIO
5. VSM PRESET
7.
9.SHIPPING(OFF)
2. V/C
4. DEF
6. STATUS
8. SURROUND
0.BUS FREE
123
456
789
0
P
AV
TV OK
MENU
P
F
.T/L
TV
INFORMATION
MUTING
MENU
FUNCTION
/
FUNCTION
/

1-16 (No.YA262)
4.6.3 SERVICE MODE FLOW CHART
Do not adjust
Do not adjust Do not adjust
SERVICE MENU
SC DEV
1. RGB BLK
2. V/
6. STATUS
8. SURROUND
C
PAV/C L
- / + : STORE i : EXIT
DEF FULL 100Hz
1. V-SHIFT
4. DEF
- / + : STORE i : EXIT
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
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT i : EXIT
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. ERR LIMIT
2. A2 ID THR
3. Q-PEAK
4. SOUND LEV
AUDIO
3. AUDIO
1. ERR LIMIT 0010
C_AD_BITS =
ERROR LIMIT =
- / + : STORE i : EXIT
1.IF(VCO)
BRIGHT
STANDARD
SOFT
5. VSM PRESET
VSM PRESET BRIGHT
1.CONT
1.CH CONFIG
1.SOFT
- / + : STORE i : EXIT
1. CONT
2. BRIGHT
3. SHARP
4. COLOUR
5.HUE
1. WDR R
2. WDR G
3. WDR B
PICTURE MODE
COOL
NORMAL
WARM
COLOR TEMP
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
9. CONT
10. COLOUR
11. HUE
12. SHARP
13. SC ADJ
14. SIDE .P.L
15. SIDE .P.R
OK
OK
OK
OK
- / + : STORE i : EXIT
OK
- / + : STORE i : EXIT
OK
1.CH CONFIG
2.MATRIX
3.REPRODUCTIO
4.CENTER MODE
5.SPATIAL EFF
6.VIRTUAL EFF
7.BASS EFFECT
8.HARM
9.HPF
1.SOFT
2.TELETEXT
3.ASPECT
4.PROTECT
5.FLASH
10.LPF
11.AMP LIMIT
12.LEVEL ADJU
13.SWC
14.SW HPF
15.VOLUME
16.HYPER EFFE
17.EFFECT MOD
18.HP GAIN
S:MEDIUM
B:MEDIUM
STATUS
SURROUND

(No.YA262)1-17
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]
NOTE: [ ] is fixed values.
NOTE: [ ] is fixed values.
4.7.2 [3. AUDIO] [Do not adjust]
Setting item Variable
range
Initial setting value
PAL SECAM NTSC 3.58 NTSC 4.43
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]
Setting item Variable
range
Initial setting value
PAL SECAM NTSC 3.58 NTSC 4.43
TV EXT TV EXT TV EXT TV EXT
12.SHARP -015 - 0015 [-002] [0000] [-002] [0000] [-002] [0000] [-002] [0000]
Setting item Variable
range
Initial setting value
PAL SECAM NTSC 3.58 NTSC 4.43
13.SC ADJ. 0000 - 0063 0018 --- --- ---
Setting item Variable
range
Initial setting value
PAL SECAM NTSC 3.58 NTSC 4.43
REGULAR 14:9 ZOOM REGULAR 14:9 ZOOM REGULAR 14:9 ZOOM REGULAR 14:9 ZOOM
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
Setting item Variable
range Fixed value
1. ERR LIMIT
0000H - 0FF0H 0010H
2. A2 ID THR
0000H - 00FFH 0019H
3. Q-PEAK --- ---
4. SOUND LEV --- ---

1-18 (No.YA262)
4.7.3 [4. DEFLECTION] [AV-28X5BU, AV-28X5SU]
NOTE: [ ] is fixed values.
4.7.4 [4. DEFLECTION] [AV-32X5BU, AV-32X5SU]
NOTE: [ ] is fixed values.
Setting item Variable
range
Initial setting value
FULL PANORAMIC SUBTITLE COMPRESS
100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p
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]
Setting item Variable
range
Initial setting value
FULL PANORAMIC SUBTITLE COMPRESS
100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p 100Hz i 60Hz p
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]

(No.YA262)1-19
4.7.5 [5. VSM PRESET]
4.7.6 [8.SURROUND] [Do not adjust]
Item Variable
range
Setting value
PICTURE MODE COLOUR TEMP.
BRIGHT STANDARD SOFT COOL NORMAL WARM
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
Setting item Variable
range Initial setting value
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

1-20 (No.YA262)
4.8 ADJUSTMENT PROCEDURE
4.8.1 CHECK ITEM
4.8.2 FOCUS
Item Measuring
instrument Test point Adjustment part Description
B1 VOLTAGE DC voltmeter
Remote
control unit
X connector
1-pin:TP-91(B1)
5-pin:TP-E
[POWER & DEF PWB]
[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.
HIGH VOLTAGE HV voltmeter
Remote
control unit
CRT anode
Chassis GND
[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.
IF VCO Remote
control unit
[1.IF]
1.VCO
• Under normal conditions, no adjustment is required.
• It must not adjust without broadcast signal.
(1) Receive the any broadcast.
(2) Select 1.IF from the SERVICE MODE.
(3) Select < 1.VCO >.
(4) Check the "←" position between the ABOVE REF.
and BELOW REF.
Item Measuring
instrument Test point Adjustment part Description
FOCUS Signal
generator
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.
NU
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
VCO(CW) **** MHz
1. VCO
IF SERVICE ME
2. ATT ON/OFF
HVT
SCREEN
FOCUS