Sony Trinitron PVM-2130QM User manual

PVM-2130QM
SERVICE MANUAL AEP Model
Chassis No. SCC-A99A-A
Australian Model
Chassis No. SCC-B22A-A
West Germany Model
Chassis No. SCC-B 19A-
A
Color system PAL, SECAM, NTSC and NTSC4 43 systems,
switched automatically
Picture tube Trinitron tube
Approx. 54.5 cm (21 inches)
(50.6 cm picture measured diagonally)
100-degree deflection, AG pitch 0.55 mm
Resolution Video input: 420 TV lines
RGB inputs: 640 x200 dots
(2000 characters)
Color temperature
9300°
K
Frequency response
10 MHz (-3 dB, RGB)
5MHz (-3 dB, composite video)
Horizontal linearity
Less than +7%
Vertical linearity Less than ±8%
Line pull range Horizontal: -t- 500 Hz
Vertical: -8 Hz
Overscan of the picture
Less than -i-7%
Convergence Central area: within 1.0 mm
Periphery: within 1.8 mm
LiNE A/B, VTR inputs
ViDEOIN: LINE AyB:BNC connector
Composite video, 1Vp-p ±6 dB, sync
negative, 75-ohm termination
switchabie
VTR: 8-pin connector
Composite video, 1Vp-p ±6 dB, sync
negative, 75-ohm terminated
AUDIO IN: LINE A/B: Phono jack
-5 dBs, more than 47 kilohms
VTR: 8-pin connector, -5 dBs, more
than 47 kilohms
LINE A/B outputs (loop-through outputs)
VIDEO: BNC connector
AUDIO: Phono jack
Monitor outputs VIDEO: BNC connector
Composite video, 1Vp-p
AUDIO: Phono jack
Less than 1kilohm
Digital RGB inputs RGB: D-sub 9-pin connector
(See "Signal assignment”.)
AUDIO: Phono jack
-5 dBs, more than 47 kilohms
AV connector 21-pin connector
(See "Signal assignment".)
Speaker terminals 8ohms
Control Sinput/output
Minijack, 5 Vp-p
Power output 7W-f 7Wat 8ohms
Power requirements
220 -240 VAC, 50/60 Hz
Power consumption
140 W
Dimensions Approx. 516 x409 x482 mm (w/h/d)
incl. projecting parts and controls
Weight Approx. 30.6 kg
Supplied accessory
Remote commander RM-668, with 2R6 batteries 1
Optional accessories
TV stand SU-538, SU540
Speaker system SS-X6A, APM-X5A
—Continued on page 2—
TRINITRON COLOR VIDEO MONITOR

PVM-2130QM
RM-668
SIGNAL ASSIGNMENT
DIGITAL RGB connector
(D-sub 9-pin)
12 3 4 5
678 9
Digital signal (TTL level)
Pin No. Signal assignment
1Ground
2Ground
3Red input
4Green input
5Blue Input
6Intensity input
7No connection
8H. sync input
(positive/negative)
9V. sync input (positive/negative)
AV connector (21-pin)
20 18 16 14 12 10 8 642
oooooooooo
o o oooooooo
21 19 17 15 13 11 97531
PlnNQ. Signal hml
1Audio output B
(right)
Standard level: 0.5 Vrms
Output impedance: Less than
1kohm*
2Audio input B
(right)
Standard level: 0.5 Vrms
Input impedance: More than
10 kohms*
Audio output A
(left)
Standard level: 0.5 Vrms
Output impedance: Less than
1kohm*
Ground (audio)
5Ground (blue)
6Audio input A
(left)
Standard level: 0.5 Vrms
Input impedance: More than
10 kohms*
7Blue input 0.7 V±3 dB, 75 ohms, positive
8Function select
(AV control)
High state (9.5 -12 V): Peri mode
Low state (0 -2V): TV mode
Input impedance: More than
10 kohms
Input capacitance: Less than 2nF
Pin No. Signal Signal level
9Ground (green)
10 Open
11 Green input (Same as Pin 7)
12 Open
13 Ground (red)
14 Ground (blanking)
15 Red input (Same as Pin 7)
16 Blanking input High state (1 -3V)
Low state (0 -0,4 V)
Input impedance: 75 ohms
17 Ground (video output)
18 Ground (video input)
19 Video output 1V±3 dB, 75 ohms, positive
Sync: 0.3 V(±3 dB)
20 Video input 1V±3 dB, 75 ohms, positive
Sync: 0.3V(±3dB)
21 Common ground (plug, shield)
*at 20 Hz -20 kHz
Design and specifications subject to change without notice.
TROUBLESHOOTING
If these symptoms occur when you begin operation, follow the suggestions below.
SYMPTOMS CORRECTIONS
No controllable keys although the POWER switch is turned
on.
•Press the CONTROL key.
No indication appears although the CONTROL key is pressed. •Set the MANUAL CONTROL switch on the rear panel to ON.
Remote control is not possible. •Set the REMOTE CONTROL switch on the rear panel to ON.
If the problem still cannot be solved, contract your authorized Sony dealer.
2

TABLE OF CONTENTS
Section Title Page
1.
GENERAL
1-1. Location and Function of Parts and
Control 4
1-2. Operation 8
1-3. System Connections 9
2.
DISASSEMBLY
2- 1.Power Block Assy and Chassis Assy
Removal 13
2-2. Key Board Unit Removal 13
2-
3. Picture Tube Removal 14
3. SETUP ADJUSTMENTS
3-
1.Beam Landing 15
3-2. Covergence 16
3-
3. White Balance Adjustment 18
4. CIRCUIT ADJUSTMENTS
4-
1. FA Boards Adjustment 19
4-2. DBoards Adjustment 19
4-3. HC Board Adjustment 20
4-4. BBoard Adjustment 20
4-
5. Safety Check Adjustment 21
5. DIAGRAM
5-
1. Circuit Boards Location 23
5-2. Block Diagram 24
5-3. Frame Schematic Diagram 29
5-4. Schematic Diagram and Pointed
Wiring Boards 34
5-
5, Semiconductors 63
6. EXPLODED VIEWS
6-
1.Picture Tube 65
6-2. Chassis 66
6-3. Back Cover 67
6-4. Key Board Unit 68
7. ELECTRICAL PARTS LIST 69
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARK
AON THE SCHEMATIC DIAGRAMS, EXPLODED
VIEWS AND IN THE PARTS LIST ARE CRITICAL TO
SAFE OPERATION. REPLACE THESE COMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL TO SAFE OPERATION ARE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PRO-
CEDURES WHENEVER CRITICAL COMPONENTS ARE
REPLACED OR IMPROPER OPERATION IS SUSPECTED.

PVM-2130QM
RM-668
1-1. LOCATION AND FUNCTION OF PARTS AND
CONTROL
SECTION 1
GENERAL
•Press CONTROL key after power is turned on to illuminate the control keys or indicators.
The following control keys are effective only when MANUAL CONTROL switch on the rear panel is set to ON.
4

PVM-2130QM
RM-668
Ij] norm (normal) key
Press this key to return to the standard setting.
•This key is effective oniy for the controi keys on the left.
[2] HUE control keys
Press the GRN (green) key to make the skin tones
greenish or the PUR (purpie) key to make it purplish.
•These controi keys are effective for the NTSC and
NTSC443 coior systems only.
[3]COLOR control keys
Press the +key to make the color intensity vivid or the -
key to make it pale.
[4]BRIGHT (brightness) control keys
Press the +key to make the picture brighter or the -key
to make it darker.
[s] SHARP (sharpness) control keys
Press the +key to obtain asharp picture or the -key to
obtain asoft picture.
Q] BALANCE control keys
Press the Lkey to increase the sound volume of the left
speaker or the Rkey to increase the sound volume of the
right speaker.
[T] Coior system indicators
PAL, SECAM, NTSC, NTSC443
The color system of the input signal is automatically
selected and the corresponding indicator illuminates.
When the input signal is monochrome, no color system
indicator illuminates.
[T] MUTING indicator
Illuminates while the sound is muted.
•Muting is controlled only by the Remote Commander.
H] STANDBY indicator
Illuminates when the power is turned off by the Remote
Commander.
Ql POWER switch
Press this switch to turn the monitor on.
Press this switch again to turn it off.
•When the monitor is turned on, the settings of the
monitor are the same as when it was last turned off.
•For afew seconds after turning on the monitor the color
of picture may vary because the white balance is
adjusted at this time. This is not aproblem.
Qi] Remote control detector
The beam from the Remote Commander (s received here.
im CONTROL key
Press this key to illuminate the keys and indicators on the
front panel.
Press this key again to extinguish them.
[H VOLUME control keys
Press the +key to raise the volume or the -key to lower
it.
[1^PICTURE control keys
Press the +key to make the contrast, color intensity and
brightness stronger or the -key to make them weaker.
[m Input select keys
LINE A, LINE B, VTR, AV, DIGITAL
Select the input source connected to the LINE A, LINE B,
VTR, AV or DIGITAL RGB connector.
When akey is pressed:
•it blinks if the other indicators and keys on the front
panel illuminate.
•it illuminates if they are extinguished.
Key illumination
For the keys Q] through 0, [13] and [14]:
•While each key is pressed, it blinks, indicating that
adjustment is going on.
•During adjustment, if the adjustment value reaches the
limit, the blinking speed becomes slower.
5

PVM-2130QM
RIVI-668
REAR PANEL
•[T| TREBLE control
-s BASS control
^in PICTURE (RGB) control
[X| HCENTER (DIGITAL RGB) control
sVHOLD control '
I6ICONTROL select switches
[T] TREBLE control
Turn clockwise for more treble (high tone), or
counterclockwise for less.
[2]BASS control
Turn clockwise for more bass (low tone), or
counterclockwise for less.
Q] PICTURE (RGB) control
Adjust the contrast of the RGB signals connected to the
AV connector or the DIGITAL RGB connector.
[Tj HCENTER (DIGITAL RGB) (horizontal centering)
control
When the picture of DIGITAL RGB input is decentered
horizontally, correct it with this control.
U] VHOLD (vertical hold) control
When the picture rolls vertically, correct it with this
control.
[6] CONTROL select switches
Normally set to ON.
REMOTE CONTROL switch
Set this switch to ON to control the monitor with a
Remote Commander.
If this switch is set to OFF, the remote control is not
possible.
MANUAL CONTROL switch
Set this switch to ON to control the monitor manually.
To make the manual control of the control keys or
switches on the front panel impossible, extinguish the
indicators by pressing the CONTROL key on the front
panel and set this switch to OFF.
(However remote control is possible if the REMOTE
CONTROL switch is set to ON.)
6

PVM-2130QM
RM-668
CONNECTORS 11SPEAKER L/R terminals
CONTROL Sconnectors
3ILINE A/LINE Binputs
MONITOR OUT connector
VTR connector
SUPERIMPOSE switch
AV connector
U] SPEAKER UR terminals
Connect to speakers with 8to 16 ohm impedance.
|T] VTR connector (8-pin)
Connect to aVTR with an 8-pin TV connector.
[2] CONTROL SIN/OUT connectors
Connect to the CONTROL Sconnectors of aVTR or
another monitor.
It is then possible to control the whole system with a
single Remote Commander.
[U LINE A/LINE Binputs
H] DIGITAL AUDIO jack (phono jack)
Connect to the audio output of an audio source to listen
to the sound from the connected audio source while
viewing the picture from the DIGITAL RGB connector.
[T] DIGITAL RGB connector (9-pin, D-sub)
Connect to the digital RGB output of amicrocomputer.
VIDEO IN connector (BNC type)
AUDIO UR IN jacks (phono jack)
Connect to the video and audio outputs of aVTR or a
camera.
VIDEO OUT connector (BNC type)
AUDIO UR OUT jacks (phono jack)
Loop-through outputs of the IN connector and jacks.
Connect to the video and audio inputs of another monitor.
75-ohm termination switch
When only the VIDEO IN connector is used (nothing is
connected to the VIDEO OUT connector), set this switch
to ON.
When both connectors are used together for aloop-
through connection, set this switch to OFF.
S] MONITOR OUT connectors
VIDEO connector (BNC type)
AUDIO UR jacks (phono jacks)
The video and audio signais supplied from the LINE A,
line B, VTR or AV input selected by the front panel input
select keys are output from these connectors.
Connect to the video and audio inputs of another monitor,
VTR, etc.
S] INTENSITY switch
Normally set to OFF. When amicrocomputer provided
with intensity output is connected, set to ON for 16-coior
display.
[T| AV switch
Set to ON so that the monitor is automatically switched
to the AV input when asignal is input from the AV
connector, taking priority over the LINE A, LINE Bor VTR
input previously selected by the input select keys on the
front panel. Set to OFF to select the AV input manually by
pressing the AV input select key.
di SUPERIMPOSE switch
Normally set to ON.
Set to OFF to display the analog RGB signal from the i
microcomputer connected to the AV connector.
[TTJ AV connector (21 -pin)
Connect to the 21-pin multiconnector of an 8mm video
cassette recorder or the analog RGB multioutput i
connector of amicrocomputer.
7

PVM-2130QM
RM-668
1-2. OPERATION
displaying the picture NOTES ON INPUT SELECTION
AV input and SUPERIMPOSE switch
Set the SUPERIMPOSE switch on the rear as follows,
according to the signal supplied to the AV connector.
1Depress the POWER switch.
One of the input select keys illuminates.
2Press the CONTROL key.
The selected input select key blinks and all control keys
on the front illuminate.
(If the control keys do not appear, set the MANUAL
CONTROL switch on the rear to ON.)
3Press the desired input select key.
The pressed key blinks and the picture from the selected
input is displayed on the screen and the sound is heard
through the speakers.
(For selecting the AV or DIGITAL input, see “Notes on
input selection".)
4Adjust the picture and sound.
5Press the CONTROL key to extinguish the controls keys
so that only the selected input select key illuminates.
SUPERIMPOSING
To superimpose the data from the microcomputer connected
to the AV connector over the picture, proceed as follows.
(The data should be processed for superimposition on the
microcomputer.)
1Set the SUPERIMPOSE switch to ON.
2Press the LINE A, LINE Bor VTR input select key to
display the picture on which the data is to be
superimposed on the monitor screen.
3Press the AV input select key.
The data is superimposed over the picture.
4Adjust the contrast of the superimposed data with the
PICTURE (RGB) control.
SUPERIMPOSE
8v4tch Signal to be displayed
ON •To display the composite video
signal from an 8mm video cassette
recorder, etc.
•To perform superimposition. (See
“SUPERIMPOSING”.)
OFF •To display the analog RGB signal
from amicrocomputer, etc.
In this case, the sync signal should
be supplied to pin 20 of the AV
connector.
•When the AV input select key is pressed with the
SUPERIMPOSE switch ON, the previously selected LINE A,
LINE Bor VTR input select key blinks together with the AV
key.
•When it is pressed with the SUPERIMPOSE switch OFF,
only the AV key blinks.
AV input and AV switch
When the AV switch on the rear is set to ON, the monitor is
automatically switched from the LINE A, LINE Bor VTR input
to the AV input if asignal is input to the AV connector.
Set the AV switch to OFF to select the AV input manually by
pressing the AV input select key.
DIGITAL input
•To display the digital RGB signal from amicrocomputer
provided with intensity output in 16 colors, set the
INTENSITY switch on the rear to ON.
•If necessary, center the picture from the DIGITAL RGB
connector with the HCENTER control on the rear panel.
Note
The COLOR, HUE and SHARP control keys do not function
when the DIGITAL input is selected or the AV input is
selected with the SUPERIMPOSE switch OFF.
8

CONNECTION DIAGRAM
oKoaSaiQ QOQqI
•oiilQ aaaai aQ8mm video cassette
recorder, etc.
Align and insert
the connector.
To remove, whiie
1pressing the
catches, pull.
Optional video cable
VMC-S or equivalent
Left Right
speaker speaker
When amicrocomputer has an analog RGB output
connector, connect it to the AV connector.
2Tighten the
Another monitor
•When amicrocomputer has only acomposite video output
connector, connect it to the LINE Aor LINE BVIDEO IN
connector.

PVM-2130QM
RM-668
CONNECTING SEVERAL MONITORS
Aloop-through connection is convenient for monitoring the
same signal on ther monitors. Up to 10 monitors can be
connected. It is recommended to use asignal distributor
when several monitors are connected.
r1i
pOITj
QoloQl
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aaaia ’aO
-10 -

PVM-2130QM
RM-668
CONTROL SCONNECTION
The following connections allow remote control of several
monitors and aVTR through asingle monitor.
-11 -
Last monitor

PVM-2130QM
RM-668
Do not use the following loop connections.

PVM-2130QM
RM-668
2-3. PICTURE TUBE REMOVAL
•Removing Procedures
®Turn up one side of the rubber cap in the direction
indicated by the arrow (a)
Using athumb, pull up the rubber cap firmly in the
direction indicated by the arrow @
(j) Ih/hen 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 up it in the direction of the
arrow @
14 -

PVM-2130QM
RM-668
SECTION 3
SET-UP ADJUSTMENTS
•The following adjustments should be made
when acomplete realignment is required or a
new picture tube is installed.
•These adjustments should be performed with
rated power supply voltage unless otherwise
noted.
Perform the adjustments in order as follows;
1. Beam Landing
2. Convergence
3. White Balance
Note: Test Equipment Required
1. Color-bar/Pattern Generator
2. Degausser
3-1. BEAM LANDING
Preparation;
•Input the RASTER pattern.
•Before starting, degauss the entire screen.
1.Turn on set power supply and input aRASTER
signal.
2. Evenly degauss the entire screen.
3. Loosen the deflection yoke mounting screw,
and set the purity control to the center as
shown in Figure 3-1.
4. Input ared signal.
5. Move the deflection yoke back, and adjust the
purity control so that RED is in the center and
GREEN and BLUE are at the sides, evenly.
(Figure 3-2.)
6. Move the deflection yoke forward so that the
entire screen is red.
•If the deflection yoke is pushed all the way
to the CRT then moved slightly back, land-
ing adjustment is easier.
7. Substitute GREEN, then BLUE for RED in
step 4and check landing.
8. Rotate RED, GREEN and BLUE once each and
check landing.
9. When landing is not right, adjust the purity con-
trol and use magnets as shown in Figure 3-3,
then repeat steps 7and 8.
10.
When amagnet is used, be sure to perform step
2,and tighten deflection yoke mounting
screw loosely.
Purity control
-15 -

PVM-2130QM
RM-668
3-2. COVERGENCE
Preparation:
•Before starting, perform FOCUS, H. SIZE, V. SIZE
and V. LIN adjustments.
4. When the V. STAT magnet is moved in the direc-
tion of arrow @and ®,Red, Green and Blue
dots move as shown below.
1. Adjust H. STAT VR to coincide red, green and
blue dots on the center of screen (Horizontal
movement)
2. Adjust V. STAT magnet to coincide red, green and
blue dots on the center of screen (Vertical move-
ment)
3. If the red, green and blue dots do not coincide on
the center of screen with H. STAT VR, perform
horizontal convergence adjustment using H. STAT
VR and V. STAT magnet as shown below. (In this
case, H. STAT VR and V. STAT magnet effect
each other.)
•Tilt the V. STAT magnet and adjust static con-
vergence to open or close the V. STAT magnet.
If blue dot does not coincide with red and green
dots, perform following steps.
Move BMC magnet (a) to correct insufficient
H. static convergence.
Rotate BMC magnet (b) to correct insufficient
V. static convergence.
In either case, repeat Beam Landing Adjustment.

PVM-2130QM
RM-668
(2) Dynamic Convergence Adjustment
Preparation:
•Before starting, perform Horizontal and Vertical
Static Convergence Adjustment.
1. Loosen deflection yoke screw.
2. Remove deflection yoke spacers.
3. Move the deflection yoke for best convergence as
shown below.
4. Tighten the deflection yoke screw.
5. Install the deflection yoke spacers.
-17 -

PVM-2130QM
RM-668
3-3. WHITE BALANCE ADJUSTMENT
1)SCREEN (Gj )adjustment
1. Confirm that Gi line voltage is 30±5 Vdc.
2. Adjust CUT OFF(R,B) so that R,B cathode
voltage becomes 180 VDC.
Adjust with Gj VT immediately prior to the
disappearing of the luminscent line.
2) W/B adjustment
1.Input aaU white signal.
2. Set the PICTURE control to minimum and turn
the BRIGHT control mechanical center.
3. Set RCUT OFF(R,B) and RV703 (B CUT
OFF) to minimum.
4. Turn RV701 (SUB BRT) slowly to obtain a
faintly visible cross-hatch.
Note the color tjat first becomes visible by
turning RV701.
5. Adjust the other two BKG controls for best
white balance (neutral gray) of the faint cross-
hatch.
6. Set the PICTURE control fully clockwise.
Observe the screen and adjust the RV1301
(G,H/L), RV1302 (B,H/L) controls for best
white balance. (B Board)
7. Repeat steps 1,through 7.
BBoard
^RV1301
^RVI302
RVI301 (G.H/U
RV1302 (B.H/U
(Component side)
CBoard
RV706
oo
RV705
R\/703
o
o
RV701
RV703(B CUT OFF)
RV705(R CUT OFF)
RV706(SUB. BRT)
RV701 (SCRN)
(Component side)
-18 -

PVM-2130QM
RM-668
SECTION 4
CIRCUIT ADJUSTMENTS
4-1. FA BOARDS ADJUSTMENT
1. Supply 220V ac to with variable auto-transformer. Adjust RV503 and RV509 for a best vertical
2. Adjust RV6S1 so that the +B line is 140V±O.SV. SIZE Picture.
3. Adjust RV652 so that the pin (J^or IC651is 32±0. 1V.
4-2. DBOARD ADJUSTMENTS
IHorizontal Position Adjustment \
1. Check that Hcenter moves to the right and left with
horizontal position VR (RVSS5), then adjust horizon-
tal position to center.
[Picture Distortion Adjustment^
1. Picture distortion adjustment
input asignal equivalent to acrosshatch signal.
•PIN PHASE IRV553I
•PIN AMP (RV5S2)
2. Adjust RV554 (H.SIZE) so that H.SIZE is best.
3. Adjust RV555 (H. CENT! so that horizontal position is
center.
IH.FREQ Adjustment\
1. Input acolor bar signal and short between iCSOI pins
(l^and
Also short board IC401 pins @and
2. Adjust H.FREQ VR (RVS01) so that picture flow is as
shown in Figure.
3. After adjustment, remove the connections in step(Tj
fo low fo correct fQ
(fo=1S.734Hz)
DBoard
RV501 (H.FREQ)
ICSOI 111 (H FREQ)
RVS03 (V.SiZE)
RVSBS (H.CENT)
RV552 (PIN AMP)
RV509 (V.CENT)
RVSS3(PIN PHASE)
RV5S4 (H.SIZE)
(Component side)
-19
PVM-2130QM
RM-668
4-3. HC BOARD ADJUSTMENT 4-4. BBOARD ADJUSTMENTS
H. CENTER Adjustment (DIGITAL RGB)
1. Connect to the digital RGB output connector of a
microcomputer.
2. Press to select the RGB mode.
3. Turn the H. CENT VR (RV987-— Rear control pane!)
to center position.
4. Connect the oscilloscope to pin of HC-2 connector
and pin (T) of HC-2 connector.
5. Adjust RV986 (H. CENT-2) so that the phase differ-
ence level is ±0. Ipsec.
YChroma Adjustment |
1. input aPAL color bar signal.
ZConnect an oscilloscope to pin of IC301, and ad-
just so that chroma component is minimum on pin
of IC301 waveform while tracking with L451 (4.43
MHz).
3. input aNTSC (3. 58) color bar signal.
4. Connect an oscilloscope to pin of IC301 and ad-
just so that croma component is minimum on pin
of IC301 waveform while tracking with L452.
COLOR BALANCE Adjustment |
1. Input aSECAM color bar signal and set PICTURE to
maximum.
Press "RESET" to set color to standard state.
Observe blue output ITP33) waveform on the osillo-
scope and adjust L421 (B-Y) so that the black portion
of the color bar is the same level as the pedestal.
3. Observe blue output (TP31) waveform on the oscillo-
scope and adjust L405 (R-Y) so that the black portion
of the color bar is the same level as the pedestal.
2.
3.
4.
3.
4.
-20 -

connector of a
rcontrol panel)
HC-2 connector
'te phase differ-
il-^—5±0. 1ps
IVDC
-IVDC
86 (H. CENT-21
87 (H. CENT VR)
PVM-2130QM PVM-2130QM
RM-668 RM-668
4-4. BBOARD ADJUSTMENTS
/Chroma Adjustment |
1. Inpu taPAL color bar signal.
ZConnect an oscilloscope to pin of IC301, and ad-
just so that chroma component is minimum on pin
of IC301 waveform while tracking with L451 (4.43
MHz).
3. input aNTSC (3. 58) color bar signal.
4. Connect an oscilloscope to pin of IC301 and ad-
just so that croma component is minimum on pin
of IC301 waveform while tracking with L4S2.
COLOR BALANCE Adjustment |
1. input aSECAM color bar signal and set PICTURE to
maximum.
Press "RESET" to set color to standard state.
2. Observe blue output ITP33) waveform on the osillo-
scope and adjust L421 (B-Y) so that the black portion
of the color bar is the same level as the pedestal.
3. Observe blue output (TP31) waveform on the oscillo-
scope and adjust L405 (R-Y) so that the black portion
of the color bar is the same level as the pedestal.
ANTI-PAL, LINE CRAWLING Adjustment |
1. Input aPAL color bar signal and set PICTURE to
maximum.
Press "RESET" to set COLOR, HUE and BRT to stan-
dard state.
2. Confirm that there is no color on the first anti-PAL
signal frames at the right and left of the picture. If sides
while tracking with RV303.
3. Adjust T301 (DAT) for minimum line crawling.
4. Confirm the anti-PAL adjustment in 2, and repeat 3,
and 1if necessary.
APC Adjustment|
443 adjustment
1. Input aPAL color bar signal.
2. Short pin (n) and pin on IC30t.
3. Adjust CT443 to get color sync.
3. 58 adjustmen t
4. Input aNTSC (3. 58 MHz) color bar signal.
5. Adjust CT358 to get color sync.
ACC, HUE CENT Adjustment |
1. Input aPAL color bar signal and set PICTURE maxi-
mum.
2. Adjust R\/302 (ACC ADJ) so that blue output (TP33)
waveform is as shown in figure.
@
_
©®@
2.2 ±0.3Vp-p
-. 1-
3. Input aNTSC (3.58 or 4.43) color bar signal and set
PICTURE to maximum.
Press "RESET" to set COLOR, HUE and BRIGHT-
NESS to standard state.
4. Adjust RV318 (S. HUE) so that blue output (TP33)
waveform is as shown in figure.
BBoard
L452 L451
RV318
RV303
OCT443\
_
*0 T301 CT358
TP31
RV302
o
L405
@IC301
1
CT358 (3.58)
CT443 (4.43)
L405 (R-Y)
L421 (B-Y)
L451 (4.43 MHz)
L452 (Y/CHROMA)
RV302 (ACC)
RV303 (<I>)
RV318(S. HUE)
T301 (DAT)
oscilloscope
4-5. SAFETY CHECK ADJUSTMENT
HOLD DOWN ADJUSTMENT (*R53I)
1. Turn the POWER switch ON, and receive entirely white
signals and set the PICTURE and BRIGHTNESS control
to maximum.
2. Confirm that the voltage of the IC1510 (7) pin is more
than 15.78V DC when the set is operating normally
with 120V AC supply.
3. Adjust ABL current to 1400±30pA with PICTURE
and BRIGHTNESS, (ammeter 3.0mA derange)
4. Confirm that there is less than 18.35V DC where by
the raster disappears during operation of hold-down
circuit. (HOLD DOWN check point of IC1510 (t) pin)
5. Adjust ABL current to 210 t3pA with PICTURE and
BRIGHTNESS, (ammeter 0.3mA dc range)
6. Confirm that there is less than 19.25V DC where by the
raster disappears during operation of hold-down circuit.
(HOLD DOWN check point of IC1510(^pin)
Note: If the hold-down circuit starts operating in the
above case, switch OFF the POWER of the set
immediately.
7. If above steps is not satisfied, select resistance value of
R597 and repeat above steps 1through 6.
T604
FBT
step ®®
ammeter
0.3mA dc
range
SECTION
DIAGRAIV
5-1. CIRCUIT BOARDS LOCATION
20 --21 -