Sony TRINITRON KV-G142M User Manual

SERVICE MANUAL BG-2S
MODEL COMMANDER DEST. CHASSIS NO.MODEL COMMANDER DEST. CHASSIS NO.
CHASSIS

KV-G14M2

RM-869 Russia SCC-U11A-A
TRINITRON
®
COLOR TV
KV-G14M2
RM-869

SPECIFICATIONS

Power requirements 110-240 V AC, 50/60 Hz Power consumption (W) Indicated on the rear of the TV Television system B/G, I, D/K, M Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58 Channel coverage
B/G VHF: E2 to E12 / UHF: E21 to E69 / CATV: S01 to S03, S1 to S41 I UHF: B21 to B68 / CATV: S01 to S03, S1 to S41 D/K VHF: C1 to C12, R1 to R12/UHF: C13 to C57, R21 to R60 /
CATV: S01 to S03, S1 to S41, Z1 to Z39
M VHF: A2 to A13 / UHF: A14 to A79 /
CATV: A-8 to A-2, A to W+ 4, W+ 6 to W+ 84
Audio output (speaker) 3W Inputs ˘ (antenna): 75 ohms external terminal
(video input) jacks: phono jacks
D (video): 1 Vp-p, 75 ohms
(audio): 500 mVrms, high impedance
Outputs A (earphone) jack: minijack
Ú (monitor output) jacks: phono jacks
D (video): 1 Vp-p, 75 ohms
(audio): 500 mVrms
Picture tube 14 in.
Tube size (cm) 37 Measured diagonally Screen size (cm) 34 Measured diagonally
Dimensions (w/h/d, mm) 373 × 346 × 412 Mass (kg) 11
Note
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.
Design and specifications are subject to change without notice.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ! ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE CRITICAL T O SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
KV-G14M2

TABLE OF CONTENTS

Section Title Page Section Title Page
RM-869
1. GENERAL .................................................................... 4
2. DISASSEMBLY
2-1. Rear Cover Removal............................................ 9
2-2. A Board Removal ................................................ 9
2-3. F1 Board Removal ............................................... 9
2-4. Service Position ................................................... 9
2-5. Replacement of Parts ........................................... 10
2-6. Terminal Board Bracket Removal ....................... 10
2-7. Demagnetization Coil Removal .......................... 10
2-8. Picture Tube Removal.......................................... 11
3. SET-UP ADJUSTMENTS
3-1. Beam Landing ...................................................... 12
3-2. Convergence......................................................... 13
3-3. Focus Adjustment ................................................ 14
3-4. G2 (Screen) and White Balance Adjustments..... 15
4. SELF DIAGNOSIS FUNCTION............................ 16
5. CIRCUIT ADJUSTMENTS
5-1. Adjustments with Commander ............................ 17
5-2. Adjustment Method ............................................. 18
5-3. A Board Adjustment after IC003 (Memory)
Replacement......................................................... 22
5-4. Picture Distortion Adjustment............................. 22
6. DIAGRAMS
6-1. Block Diagram ...................................................... 23
6-2. Circuit Boards Location ....................................... 26
6-3. Schematic Diagrams and Printed Wiring Boards. 26
(1) Schematic Diagram of A Board............................ 31
(2) Schematic Diagrams of C and F1 Boards ............ 35
6-4. Semiconductors..................................................... 38
7. EXPLODED VIEW
7-1. Chassis .................................................................. 40
8. ELECTRICAL PARTS LIST.................................... 42
3
1
– PROGR +
SELECT
– PROGR +
– VOLUME +
TV/VIDEO
SELECT
VHF LOW B/G
1
2
3
1
2
Ö
ÖÚ
Ö
ò
D
SECTION 1

GENERAL

KV-G14M2
RM-869
The operating instructions mentioned here are partial abstracts from the Operating Instructions Manual. The page numbers of the Operating Instruction Manual remain as in this manual.
5
Getting Started
-EN
Connecting optional equipment
You can connect optional audio/video equipment to your TV such as a VCR, multi disc player, camcorder, or video game.
Connecting video equipment using the
(video input) jack
When connecting video equipment to the
(video input) jack
Do not connect video equipment to the
(video input) jacks at the front and the rear of your TV simultaneously; otherwise the picture
will not be displayed properly on the screen.
Connecting audio/video equipment using the
Ú
(monitor output) jack
Rear of TV
to antenna socket
VCR
to antenna output
ÖÚ
D
to video and audio inputs
: Signal flow
Rear of TV
to antenna output
to video and audio outputs
VCR
to antenna socket
ÖÚ
D
: Signal flow
Front of TV
Camcorder
D…≥
to video and audio outputs
: Signal flow
to
(video input)
D
(video) and
(audio) inputs
to
Ú
(monitor output)
D
(video) and
(audio) outputs
to
(video input)
D
(video) and
(audio) inputs
When recording through the
Ú
(monitor output) jack
Do not change the channel or video input while recording with a VCR; otherwise the channel or video input you are recording also will be changed.
Getting Started
4
-EN
Connecting a VHF antenna or a combination VHF/UHF antenna — 75-ohm coaxial cable (round)
Attach an optional IEC antenna connector to the 75-ohm coaxial cable.
Plug the connector into the
(antenna) socket at the rear of the TV.
Connecting an indoor antenna
Connections
On a wall
or
Note
You are advised to use an outdoor antenna for better reception.
3
1
2
Ö
ÖÚ
Ö
ò
D
Getting Started
Rear of TV Rear of TV
KV-G14M2
RM-869
KV-G14M2
Getting Started
6
-EN
Presetting channels
If the picture color is poor and/or the sound is noisy
Select the appropriate TV system as follows:
1 Press SELECT on the remote commander or the TV
until “TV SYSTEM” appears.
2 Press +/– on the remote commander or
. +/– on
the TV until the picture and sound becomes normal.
Notes
If you do not know your local TV system, consult your nearest
authorized service center or dealer.
The setting of the “TV SYSTEM” is memorized for each
program position.
Presetting channels automatically
1
Press SELECT on the remote commander or the TV until “TV SYSTEM” appears on the screen.
2
Press +/– on the remote commander or
.
+/– on the TV to select the TV system.
3
Press SELECT on the remote commander or the TV until “AUTO PROGRAM” appears on the screen.
4
Press +/– on the remote commander or
. +/– on the TV.
You can preset up to 100 TV channels in numerical sequence from program position 1 using the buttons on the remote commander or the TV.
You can preset TV channels quickly, automatically or manually.
Quick channel presetting
1
Press U
to turn on the TV.
When the TV is turned on in standby mode, press
u
on the remote commander.
2
Press SELECT and PROGR + on the TV simultaneously for one to two seconds.
Remote commander
1 2 3
1
– PROGR +
SELECT
U
TV
PROGR
+
.
+
TV/VIDEO
SELECT
R
U
u
Number
PROGR +/–
+/–
SELECT
Front of TV
TV SYSTEM
SELECT SELECT
or
or
AUTO PROGRAM
SELECT SELECT
or
VHF LOW B/G
1
.
+
or
B/G I D/K M
.
+
7
Getting Started
-EN
5
Press +/– on the remote commander or
. +/– on the TV again.
To start presetting channels automatically from the specified program position
Press PROGR +/– or number buttons on the remote commander or PROGR +/– on the TV until the required program position appears on the screen after step 4 of “Presetting channels automatically”.
Presetting channels manually
1
Press SELECT on the remote commander or the TV until “TV SYSTEM” appears on the screen.
2
Press +/– on the remote commander or
.
+/– on the TV to select the TV system.
3
Press SELECT on the remote commander or the TV until “MANUAL PROGRAM” appears on the screen.
4
Press +/– on the remote commander or
.
+/– on the TV.
5
Press PROGR +/– or number buttons on the remote commander or PROGR +/– on the TV until the required program position appears on the screen.
6
Press +/– on the remote commander or
. +/– on the TV until the required channel
picture appears on the screen.
7
Press SELECT on the remote commander or the TV.
Disabling program positions
1
Press PROGR +/– or number buttons on the remote commander or PROGR +/– on the TV until the unused or unwanted program position appears on the screen.
2
Press SELECT on the remote commander or the TV until “MANUAL PROGRAM” appears on the screen.
3
Press +/– on the remote commander or
. +/– on the TV.
4
Press PIC MODE on the remote commander.
5
Press SELECT on the remote commander or the TV.
To preset the disabled program position again
Preset the channel quickly, automatically or manually
.
1
2
3
4
6
7
8
9
÷
0
5
PROGR
– PROGR +
or
or
VHF LOW B/G
.
+
1
SELECT
SELECT
or
or
1 2 3
1
.
+
or
1
2
3
4
6
7
8
9
÷
0
5
PROGR
– PROGR +
or
or
or
TV SYSTEM
SELECT SELECT
or
B/G I D/K M
.
+
or
MANUAL PROGRAM
SELECT
SELECT
.
+
or
RM-869
Operations
8
-EN
Watching the TV
Turning off the TV
To turn off the TV temporarily
Press
u
on the remote commander. The
u
indicator
on the TV lights up.
To turn off the TV completely
Press
U on the TV.
If the power on the TV is turned off in standby mode, the
u
indicator on the TV may remain alight for a while.
Watching the video input
Press F
.
To watch TV
Press
;
.
Muting the sound
Press ¤.
1
Press U to turn on the TV.
When the TV is turned on in standby mode, press
u
on the remote commander.
2
Select the TV program you want to watch.
To select a program position directly
Press the number button.
To select a two-digit program position, press “-/--” before the number buttons. For example: to select program position 25, press “-/--,” and then “2” and “5.”
To scan through program positions
Press PROGR +/– until the program position you want appears.
3
Press . +/– to adjust the volume.
1
2
3
4
6
7
8
9
÷
0
5
÷
2 5
PROGR
Operations
U
.
u
¤
MUTING
U
F
VIDEO
1
;
9
Operations
-EN
1
AUTO B/G
DYNAMIC
-EN
If no buttons or controls are pressed for more than two hours
after the TV is turned on using the Wake Up Timer, the TV automatically turns into standby mode. If you want to continue watching the TV, press any button or control on the TV or remote commander.
After 30 minutes
After 60 minutes
After 90 minutes
No sleep timer
SLEEP TIMER:30M
SLEEP TIMER:60M
SLEEP TIMER:OFF
SLEEP TIMER:90M
C
I
Displaying on-screen information
Press
E G
.
The program position, local system, and TV settings are displayed on the screen.
EG
Setting the Sleep Timer
You can set the TV automatically turned off as you program.
Press
C
I.
To cancel the Sleep Timer, press
C
I
repeatedly
until “SLEEP TIMER: OFF” appears, or turn off the TV.
Changing the on-screen display
language
You can use buttons on the remote commander or the TV to change the on-screen display language.
1
Press SELECT until the screen appears as follows:
2
Press +/– to select “ ”.
Note
You can also use SELECT and
.
+/– on the TV to select the
on-screen display language.
Setting the Wake Up Timer
You can set the TV automatically turned on as you program.
1
Press
B
© repeatedly to set the timer.
The on-screen display appears and the
B
indicator
on the TV lights up.
2
If you want a particular TV program or video input to be displayed using the Wake Up Timer, select the TV program or video input.
3
Press
u on the remote commander or set
the Sleep Timer to turn off the TV in standby mode.
To cancel the Wake Up Timer, press
B
© repeatedly
until “WAKE UP TIMER: OFF” appears, or turn off the main power of the TV.
Notes
The Wake Up Timer starts immediately after the on-screen
display disappears.
The last TV program position or video input just before the TV
turns into standby mode will appear when the TV is turned on using the Wake Up Timer.
After 10 minutes
No wake up timer
After 12 hours
WAKE UP TIMER:0H10M
WAKE UP TIMER:OFF
WAKE UP TIMER:12H00M
B
í
©
: LANGUAGE /
+/– SELECT
LANGUAGE /
: ENGLISH
SELECT
KV-G14M2
RM-869
Operations
10
-EN
Adjusting the picture
Each time you press SELECT, the screen changes as follows:
2
Press +/– to adjust the item.
3
To adjust other items, repeat steps 1 and 2.
Note
You can also use SELECT and
.
+/– on the TV to adjust the
picture setting.
If the picture color is abnormal when receiving programs through the
˘ (antenna) terminal
Change the “TV SYSTEM” or “COLOR SYSTEM” setting or adjust the “COLOR” level in the on-screen display until the color becomes normal.
If the picture is abnormal when receiving programs through the
(video input) jack
Change the “COLOR SYSTEM” setting or adjust the “COLOR” level in the on-screen display until the color becomes normal.
Note
Normally set “COLOR SYSTEM” to “AUTO”.
If the sound is distorted or noisy when receiving programs through the
˘
(antenna)
terminal
Change the “TV SYSTEM” setting in the on-screen display until the sound becomes clear.
Note on the SOUND MODE button
The sound mode feature is unavailable for your TV. Thus, the
SOUND MODE button on the remote commander is not used for your TV.
Selecting the picture mode
Press PIC MODE until the mode you want appears.
Each time you press PIC MODE, the screen changes as follows:
Note
If you change the picture mode after the following
adjustments, the adjustment changes in accordance with the picture mode.
Adjusting the picture setting
1
Press SELECT until the item you want to adjust appears.
÷
0
SOUND
MODE
SELECT PIC MODE
PIC MODE
High contrast picture
Soft picture (good for video games)
DYNAMIC
STANDARD
SOFT
+/–
SELECT
PICTURE COLOR
BRIGHT
HUE
SHARPNESS
(Operative for NTSC signal only)
SELECT
PROGR
+
.
+
Front of TV
Normal picture
Additional Information
11
-EN
Troubleshooting
No picture No sound
/ Press
U
or u.
/ Check the antenna connection. / Check the VCR connections. / Check the power cord connection. / Check the standby mode.
Good picture No sound
/ Press
. +.
/ Press
¤
.
No color
/ Adjust the “COLOR” level in the on-
screen display.
/ Check the “COLOR SYSTEM” setting.
TV cabinet creaks
/ Even if the picture or the sound is normal,
changes in the room temperature sometimes make the TV cabinet expand or contract, making a noise. This does not indicate a malfunction.
Note on the remote commander
The supplied remote commander is used on several models of
the TV. If you do not find instructions for some controls that are on the remote commander, that means your TV does not employ the features of those controls, e.g.
V
and SOUND
MODE.
Notes
When you turn on the TV, you may hear the “boon” sound
that is caused by the demagnetization of the TV. This does not indicate a malfunction.
The picture color may become abnormal if you change the
direction of your TV. To obtain the normal picture color, press
U
on the TV to turn off the TV for five minutes and then turn
it on again.
Design and specifications are subject to change without notice.
All contents in the instruction manual are subject to change
without notice.
WARNING
Do not install the appliance in a confined space, such as a bookcase or built-in cabinet.
If you have any problems, read this manual again and check the countermeasure for each of the symptoms listed below. If the problem persists after trying the methods below, contact your nearest authorized service center or dealer.
Snowy picture Noisy sound
/Check the antenna. /Check the antenna connection on the TV
and on the wall.
/Check the “TV SYSTEM” setting.
Dotted lines or stripes
/ This may be caused by local interference
(e.g. cars, neon signs and hair dryers). Adjust the antenna for minimum interference.
Double images or “ghosts”
/ This may be caused by reflections from
nearby mountains or buildings. A highly directional antenna may improve the picture.
Good picture Noisy sound
/Check the “TV SYSTEM” setting.
Additional Information
KV-G14M2
RM-869
SECTION 2
Seven screws (BVTP 4×16)
1
2
Four screws (BVTP 4×16)
Lever
Lever
A board
F1 board
A board

DISASSEMBLY

2-1. REAR COVER REMOVAL

2-2. A BOARD REMOVAL

2-3. F1 BOARD REMOVAL

2-4. SERVICE POSITION

KV-G14M2
RM-869
KV-G14M2
Cut
Cut
Multi button
Light guide
Cut
Cut
Light guide
Two screws (BVTP 3
×12)
SCREWING TORQUE
7±1 kg•cm
Two claws
A board
Terminal board bracket
A board
Terminal board bracket
2
Demagnetization coil
1
Tension spring
Picture tube
3
DGC holder
3 DGC holder
Multi button
Three screws (BVTP 3
×12)
SCREWING TORQUE 7±1 kg•cm

2-5. REPLACEMENT OF PARTS

For replacement of the Multi Button and Light Guide, cut the welded portions from them, exchange with the new parts, and fix them with screws (+BVTP) respectively.
2-5-1. REPLACEMENT OF MULTI BUTTON
– 10 –
2-5-2. REPLACEMENT OF LIGHT GUIDE

2-6. TERMINAL BOARD BRACKET REMOVAL

RM-869

2-7. DEMAGNETIZATION COIL REMOVAL

2-8. PICTURE TUBE REMOVAL

a
a
b
b
c
Anode button
2 A board
4 C board
3 F1 board
5 Deflection yoke
Cushion
6 Four screws (Tapping screws)
1 Anode cap
– 11 –
2 Using a thumb press down, then pull up the rubber cap firmly in the direction indicated
by the arrow b.
3 When one side of the rubber cap is separated from the anode button, the anode-cap
can be removed by turning up the rubber cap and pulling it up in the direction of the arrow c.
REMOVAL OF ANODE-CAP
NOTE : After removing the anode, short circuit the anode of the picture tube and the
REMOVING PROCEDURES
1 Turn up one side of the rubber cap in the direction indicated by the arrow a.
anode cap to the metal chassis, CRT shield or carbon paint on the CRT.
HOW TO HANDLE AN ANODE-CAP
1 Do not damage the surface of anode-cap with sharp shaped objects. 2 Do not press the rubber too hard so as not to damage the inside of anode-cap.
A metal fitting called the shatter-hook terminal is built into the rubber.
3 Do not turn the foot of rubber over too hard.
The shatter-hook terminal will stick out or damage the rubber.
KV-G14M2
RM-869
KV-G14M2
GREEN
BLUE RED
Purity control
RM-869
SECTION 3

SET -UP ADJUSTMENTS

The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
These adjustments should be performed with rated power
supply voltage unless otherwise noted.
Controls and switch should be set as follows unless otherwise noted:
PICTURE control........................................................... normal
BRIGHTNESS control................................................... normal
...............................................................................................................................................................................................................................
Preparation :
In order to reduce the influence of geomagnetism on the set's
picture tube, face it east or west.
Switch on the power and degauss with the degausser.
Perform the adjustments in the following order:
1. Beam Landing
2. Convergence
3. Focus
4. White Balance
Note : Test Equipment Required:
1. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope
3-1. BEAM LANDING
1. Input a white signal with the pattern generator. Contrast Brightness
2. Set the pattern generator raster signal to green.
3. Move the deflection yoke to the rear and adjust with the purity control so that the green is at the center and the blue and the red take up equally sized areas on each side. (See Figures 3-1 through 3-3.)
4. Move the deflection yoke forward and adjust so that entire screen is green. (See Figure 3-1.)
5. Switch the raster signal to blue, then to red and verify the condition.
6. When the position of the deflection yoke has been decided, fasten the deflection yoke with the screws.
7. If the beam does not land correctly in all the corners, use a magnet to adjust it. (See Figure 3-4.)
}
normal
Fig. 3-2
Fig. 3-3
Purity control corrects this area.
ba
Disk magnets or rotatable disk magnets correct these areas (a-d).
Fig. 3-1
– 12 –
c
Deflection yoke positioning
corrects these areas.
a
d
d
Fig. 3-4
b
c
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