Sony KP-41PX1 / KP-41PX1K / KP-41PX1R Service Manual ▷ View online
– 29 –
KP-41PX1/41PX1K/41PX1R
K
RM-892
RM-892
RM-862
SECTION 4
SET-UP ADJUSTMENTS
4-1. SCREEN VOLTAGE ADJUSTMENT
(ROUGH ALIGNMENT)
1. Receive the Monoscope signal.
2. Set 50% BRIGHTNESS and minimum PICTURE.
3. Turn the red VR on the focus pack all the way to the left and
then gradually turn it to the right until the point where you
can see the retrace line.
4. Next gradually turn it to the left to the position where the
retrace line disappears.
4-2. FOCUS ROUGH ADJUSTMENT
1. Loose the lens screw.
2. Set in the service mode. (Refer to SECTION 6.)
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Press “MENU” on the Commander and select Convergence
and OSD CHSW = “00” to display the test signal (crosshatch)
on the screen.
5. Rotate the green lens and align to obtain the best lens focus
at the center area.
6. Rotate the green focus VR on the focus pack and align to
obtain the best electrical focus at the center area.
7. Perform the same alignment for red and blue lenses and elec-
tric focus.
8. Fix lens screw.
4-4. DEFLECTION YOKE TILT ADJUSTMENT
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
color.
3. Loosen the deflection yoke setscrew and align the tilt of the
Deflection yoke so that the bars at the center of the monoscope
pattern are horizontal.
4. After aligning the deflection yoke, fasten it securely to the
funnel-shaped portion (neck) of the CRT.
5. The tilt of the deflection yoke for red and blue is aligned the
same as was done for green.
Fig. 4-6
Neck Assy
Make sure deflection yoke is
touching CRT closely.
touching CRT closely.
2-pole magnet
4-pole magnet
Deflection yoke
Anode cap
Fig. 4-5
4-3. SCREEN (G2) ADJUSTMENT
1. Connect JIG (A) to 200 V and GND.
2. Select VIDEO1 mode without signals.
3. Connect JIG to the TP701(KR), TP731(KG) or TP761(KB)
of CR board, CG board and CB board.
4. Adjust R, G and B screen voltage to until retrace line disap-
pears with screen VR on the focus pack.
KR, KG, KB
5.6K/3W X3
<2.2K/3W>
GND
200V
(A)
Fig. 4-1
R
G
SCREEN
B
R
G
FOCUS
Focus Pack
B
Fig. 4-2
Test signal
Lens
Fig. 4-4
Fig. 4-3
Minimize both A and B.
A
B
– 30 –
KP-41PX1/41PX1K/41PX1R
K
RM-892
RM-892
RM-862
4-5. 2-POLE MAGNET ADJUSTMENT
(GREEN AND RED)
1. Receive the Dot signal and set PICTURE to 80%, BRIGHT-
NESS to 50%.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Turn the green focus VR on the focus pack to the right and
set to over focus to enlarge the spot.
4. Now align the 2-Pole Magnet so that the enlarged spot is in
the center of the just focus spot.
(Center of the dot does not move)
(Center of the dot does not move)
5. Align the green focus VR and set for just (precise) focus.
6. Perform the same alignment for red.
6. Perform the same alignment for red.
4-6. 4-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal and set PICTURE to 80%, BRIGHT-
NESS to 50%.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Turn the green focus VR on the focus pack to the left and set
to under focus to enlarge the spot.
4. Now align the 4-Pole Magnet so that the enlarged spot be-
comes a perfect circle for green and red.
5. Perform the same alignment for red and blue.
4-7. GREEN, RED AND BLUE FOCUS
ADJUSTMENT
4-7-1. Green, Red and Blue Lens Focus Adjustment
1. Receive the Monoscope signal and set PICTURE to minimum,
BRIGHTNESS to 50%.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Rotate the green lens and adjust to obtain the best lens focus
in all areas.
4. Fix lens screw.
5. Repeat above process for red and blue.
5. Repeat above process for red and blue.
4-7-2. Green, Red and Blue Electrical Focus
Adjustment
1. Receive the Monoscope signal and set PICTURE to minimum,
BRIGHTNESS to 50%.
2. Place the caps on the red and blue lens so that only the green
color is shown.
3. Rotate the green focus VR on the focus pack and adjust to
obtain the best electrical focus in all areas.
4. Repeat above process for red and blue.
Fig. 4-7
Use the center dot
Fig. 4-8
Use the center dot
OK
NG
NG
OK
NG
NG
[GREEN and RED]
[BLUE]
Fig. 4-9
Adjust Point : Circulars Areas
– 31 –
KP-41PX1/41PX1K/41PX1R
K
RM-892
RM-892
RM-862
SECTION 5
SAFETY RELATED ADJUSTMENT
When replacing the following components marked with
] on
the schematic diagram, always check hold-down voltage and if
necessary re-adjust.
5-1. HV HOLD-DOWN ADJUSTMENT
1. Connect HV static voltmeter to HV Block.
2. Remove CN810 and connect External Power Supply to
CN810 2 pin (+135 V) and 1 pin (GND).
Part Replaced (
])
E Board
C515,
C516,
C554,
D504,
D507,
L506,
Q502,
R1,
R514,
R516,
R517,
T502,
T504 (FBT)
G Board
IC6005
Part Replaced (
[)
R1
3. Turn on the set.
4. Receive the Dot signal and set PICTURE/BRIGHTNESS
4. Receive the Dot signal and set PICTURE/BRIGHTNESS
to minimum.
5. Slowly up the supply voltage from 0 V to 135 V until hold-
down circuit works (picture disappear).
6. Read the HV static voltmeter of peak HV voltage.
Spec : 33.7 to 36.0 KV
7. If Hold-down voltage is less than 33.7 KV then solder
R1 = 820 K and check if the voltage is within the spec.
8. If hold-down voltage is over than 36.0 KV then take-off
R514 and solder R1 = 9.1 K and check if the voltage is
within the spec.
within the spec.
+
–
2
CN810
Power
Supply
Supply
1
E BOARD
– CONDUCTOR SIDE –
CN810
CN505
CN505
R1
Fig. 5-1
Fig. 5-2
Fig. 5-3
Fig. 5-4
Remove the cap off
from the unused
terminal and connect a
HV static voltmeter
there.
from the unused
terminal and connect a
HV static voltmeter
there.
– 32 –
KP-41PX1/41PX1K/41PX1R
K
RM-892
RM-892
RM-862
6-1. HOW TO ENTER THE SERVICE MODE
6-1-1. Adjustment Method with Commander
1. Turn on the main power switch of the set and enter into
standby mode.
2. Press the following sequence of buttons on the Remote
Commander.
Service adjustment to this model can be performed with the sup-
plied remote commander RM-892 (41PX1/41PX1K) or RM-862
(41PX1R).
plied remote commander RM-892 (41PX1/41PX1K) or RM-862
(41PX1R).
“TT - -” will appear in the top right corner of the screen.
Other status information will also be displayed.
Other status information will also be displayed.
PICTURE ADJUSTMENT
AFC Mode
1
0 - 3
Ref Position
3
0 - 3
SCP BGR
1
0 - 3
SCP BGF
1
0 - 3
Trap F0
0
0 - 15
Sub Contrast
11
0 - 15
Sub Colour
10
0 - 15
Sub Brightness
13
0 - 63
Green Drive
51
0 - 63
Blue Drive
43
0 - 63
Green Cutoff
8
0 - 15
Blue Cutoff
10
0 - 15
Gamma
1
0 - 3
Pre / Overshoot
2
0 - 3
Y Delay
3
0 - 7
D Pic
ON
ON/OFF
D Colur
OFF
ON/OFF
DC Transfer
ON
ON/OFF
SECTION 6
ELECTRICAL ADJUSTMENTS
Enter the
“TT MODE”
5
(DIGIT 5)
(VOLUME +)
(TV MODE)
ON SCREEN
DISPLAY
( )
RM 892
PROGR
MENU
1
4
7
2
5
8
0
3
6
9
VIDEO
TV
TV STANDBY
ON SCREEN
DISPLAY
DISPLAY
4 : 3 / 16 : 9
MUTE
TV MODE
VOLUME +
JOYSTICK
MENU
SONY
RM-892 : 41PX1/41PX1K
OK
TV
RM 862
TV STANDBY
ON SCREEN
DISPLAY
DISPLAY
4 : 3 / 16 : 9
MUTE
TV MODE
JOYSTICK
MENU
SONY
TV
VOLUME +
1
2
3
4
5
8
6
7
10
9
+
—
—
+
—
—
RM-862 : 41PX1R
%
4. Move to the corresponding adjustment using the joystick
(v or V : up or down) on the commander.
5. Move the joystick to the right (B) to enter the selected
adjustment.
6. Press “
(OK)” to exit.
7. Before TURN OFF is necessary:
DATA WRITE : Press “
(MUTE)” + “-”
DATA COPY
: Press “
(ON SCREEN DISPLAY)”
+ “-”
8. Turn off the power to quit the service mode when adjust-
ments are completed.
Picture Adjustment
6-1-2. Screen Display on the Test Menu
(With some models, display items and contents may be
different from the following)
different from the following)
3. Press “MENU” on the commander to obtain the following
menu on the screen.
(With some models, display items may be different from
the following)
(With some models, display items may be different from
the following)
TEST MENU
Picture Adjustment
Geometry
Wide
IC Status
MSP
Dynamic Convergence
Current TV Status
Convergence
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