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AV-29BS26 Schematic ( PDF Datasheet ) - JVC

Teilenummer AV-29BS26
Beschreibung FLAT COLOUR TELEVISION SERVICE MANUAL
Hersteller JVC
Logo JVC Logo 




Gesamt 70 Seiten
AV-29BS26 Datasheet, Funktion
SERVICE MANUAL
FLAT COLOUR TELEVISION
Y210A04670 AV-29BS26,AV-29BS26/A,
AV-29BX16/G,AV-29BX16/L,
AV-29BX16/S
BASIC CHASSIS
CW3
RM-C1286
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
COPYRIGHT © 2006 Victor Company of Japan, Limited
No.YA470
2006/10






AV-29BS26 Datasheet, Funktion
SECTION 3
DISASSEMBLY
3.1 DISASSEMBLY PROCEDURE
3.1.1 REMOVING THE REAR COVER
• Unplug the power cord.
(1) Remove the 9 screws [A], and 2 screws [B].
(2) Withdraw the REAR COVER toward you.
CAUTION:
When reinstalling the rear cover, carefully push it inward after
inserting the MAIN PWB into the REAR COVER groove.
3.1.2 REMOVING THE MAIN PW BOARD
• Remove the REAR COVER.
(1) Slightly raise the both sides of the MAIN PWB by hand.
(2) Withdraw the MAIN PWB backward.
(If necessary, take off the wire clamp and connectors, etc.)
3.1.3 REMOVING THE SPEAKER
• Remove the REAR COVER.
(1) Remove the 2 screws [C].
(2) Follow the same steps when removing the other hand
SPEAKER.
3.1.4 CHECKING THE MAIN PW BOARD
• To check the back side of the MAIN PWB.
(1) Pull out the MAIN PWB. (Refer to REMOVING THE MAIN
PW BOARD).
(2) Erect the MAIN PWB vertically so that you can easily check
its back side.
CAUTIONS:
• Before turning on power, make sure that the CRT earth wire
and other connectors are properly connected.
• When repairing, connect the DEG. COIL to the DEG.
connector on the MAIN PWB.
3.1.5 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.YA470)

6 Page









AV-29BS26 pdf, datenblatt
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
PICTURE MODE(VSM)
VNR
ECO MODE
BALANCE
BASS / TREBLE / BALANCE
CINEMA SURROUND
Preset value
BRIGHT
OFF
OFF
Centre
Centre
OFF
4.3 MEASURING INSTRUMENT AND FIXTURES
(1) DC voltmeter (or digital voltmeter)
(2) Oscilloscope
(3) HV voltmeter
(4) Signal generator
(Pattern generator : PAL/NTSC)
(5) Remote control unit
4.4 ADJUSTMENT ITEMS
„ CHECK ITEMS
• B1 VOLTAGE check
• HIGH VOLTAGE check
• IF VCO check
„ TUNER / IF CIRCUIT
• DELAY POINT (AGC) adjustment
„ FOCUS
• FOCUS adjustment
„ DEFLECTION CIRCUIT
• V.SLOPE adjustment
• V.POSITION adjustment
• V.SIZE adjustment
• H.POSITION adjustment
• H.SIZE adjustment
• SIDE PIN adjustment
• TRAPEZIUM adjustment
• V. LINEARITY adjustment
• CORNER adjustment
• H. PARALLEL adjustment
• H.BOW adjustment
„ VIDEO CIRCUIT
• WHITE BALANCE adjustment
• SUB BRIGHT adjustment
• SUB CONTRAST adjustment
• SUB COLOUR adjustment
• SUB TINT adjustment
„ VSM PRESET SETTING
• VSM PRESET
„ PURITY AND CONVERGENCE
• PURITY adjustment
• STATIC CONVERGENCE adjustment
• DYNAMIC CONVERGENCE adjustment
1-12 (No.YA470)

12 Page





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