Sony KP-48PS2 / KP-61PS2 Service Manual ▷ View online
– 13 –
KP-48PS2/61PS2
K
RM-903
SECTION 3
SET-UP ADJUSTMENTS
3-1. 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
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.
can see the retrace line.
4. Next gradually turn it to the left to the position where the
retrace line disappears.
Fig. 3-1
3-2. SCREEN (G2) ADJUSTMENT
1. Turn on the power of the set.
2. Select VIDEO1 mode without signals.
3. Supply DC 175
2. Select VIDEO1 mode without signals.
3. Supply DC 175
±
0.5 V from external power supply to
TP7103 (KR), TP7203 (KG) or TP7303 (KB) of CR board,
CG board and CB board.
CG board and CB board.
4. Adjust red, green and blue screen voltage to until retrace
line disappears with screen VR on the focus pack.
3-4. DEFLECTION YOKE TILT ADJUSTMENT
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
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.
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. 3-5
Neck Assy
Make sure deflection yoke is
touching CRT closely.
touching CRT closely.
2-pole magnet
4-pole magnet
Deflection yoke
Anode cap
R
G
SCREEN
B
R
G
FOCUS
Focus Pack
B
Fig. 3-4
Lens
Fig. 3-3
Fig. 3-2
Test signal
Minimize both A and B.
A
B
3-3. FOCUS ROUGH ADJUSTMENT
1. Loose the lens screw.
2. Set in the service mode. (Refer to SECTION 5.)
3. Place the caps on the red and blue lens so that only the green
2. Set in the service mode. (Refer to SECTION 5.)
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Press “MENU” twice on the commander and select “Device
Register Setting”
b “Projector Engine”, press “6” three
times on the Commander to display the test signal (cross-
hatch) on the screen.
hatch) 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 in the top right corner.
7. Perform the same alignment for red and blue lenses and elec-
tric focus.
8. Fix lens screw.
– 14 –
KP-48PS2/61PS2
K
RM-903
3-5. 2-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Place the caps on the red and blue lens so that only the green
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 doesn't move)
(center of the dot doesn't move)
5. Align the green focus VR and set for just (precise) focus.
6. Perform the same alignment for red and blue.
6. Perform the same alignment for red and blue.
Fig. 3-6
3-6.
4-POLE MAGNET ADJUSTMENT
1. Receive the Dot signal.
2. Place the caps on the red and blue lens so that only the green
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.
5. Perform the same alignment for red and blue.
Fig. 3-7
3-7. GREEN, RED AND BLUE FOCUS
ADJUSTMENT
3-7-1. Green, Red and Blue Lens Focus Adjustment
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
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
at the center area.
4. Fix lens screw.
5. Repeat above process for red and blue.
5. Repeat above process for red and blue.
3-7-2. Green, Red and Blue Electrical Focus
Adjustment
1. Receive the Monoscope signal.
2. Place the caps on the red and blue lens so that only the green
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 at the center area.
4. Repeat above process for red and blue.
Fig. 3-8
Adjust Point
Use the center dot
Use the center dot
OK
NG
NG
KP-48PS2/61PS2
K
RM-903
– 15 –
SECTION 4
SAFETY RELATED ADJUSTMENT
When replacing the following components marked with
] on
the schematic diagram, always check hold-down voltage and
if necessary re-adjust.
4-1. HV HOLD-DOWN ADJUSTMENT
1. Connect HV static voltmeter to HV Block.
2. Mount a resistor (R9901 : 43 k
Ω
, 1/4 W, METAL
FILM) at CN5003.
3. Remove CN5002 and
connect External Power Supply to
CN5002 1 pin (+135 V) and 2 pin (GND).
4. Turn on the set.
Part Replaced (
])
D Board
C5123, C5127, C5130, C5143, D5115,
D5204, Q5104, R5136, R5138, R5140,
R9901, T5102, T5104, T5103 (FBT)
D5204, Q5104, R5136, R5138, R5140,
R9901, T5102, T5104, T5103 (FBT)
Part Replaced (
[)
R9901
5. Receive the Dot signal and set PICTURE/BRIGHTNESS
to minimum.
6. Slowly up the supply voltage from 0 V to 135 V until
hold-down circuit works (picture disappear).
7. Read the HV static voltmeter of peak HV voltage.
Spec : 33.7 ~ 35.3 kV
8. If Hold-down voltage is less than 33.7 kV then replace
R9901 of 43 k
Ω
with that of 39 k
Ω
, and check if the
voltage is within the spec.
9. If hold-down voltage is over than 35.3 kV then replace
R9901 of 43 k
Ω
with that of 47 k
Ω
, and check if the volt-
age is within the spec.
+
–
1
CN5002
Power
Supply
Supply
2
D BOARD
– CONDUCTOR SIDE –
CN5002
CN5003
CN5003
R9901
Fig. 4-1
Fig. 4-2
Fig. 4-3
Fig. 4-4
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.
– 16 –
KP-48PS2/61PS2
K
RM-903
SECTION 5
ELECTRICAL ADJUSTMENTS
5-1. ADJUSTMENTS WITH COMMANDER
Service adjustment to this model can performed with the sup-
plied remote commander RM-903.
5-1-1. How to Select Each Mode
The adjustment requires the following five modes:
• DRC100 (PAL) mode
• DRC50 (PAL) mode
• DRC100 (PAL/16 : 9) mode: V-compress mode
• DRC100 (NTSC) mode
• DRC50 (NTSC) mode
1. Selection of Mode Between PAL and NTSC
PAL mode : Enter PAL signal.
NTSC mode : Enter NTSC signal. (VIDEO input only)
2. Selection of Digital Mode
1) Press “MENU” button on the commander, and the menu
screen will appear.
2) Press B key on the joystick to enter the “Picture Adjust-
ment” menu.
3) Press v or V key on the joystick to select “Digital Mode”,
and press B key.
4) Press v or V key on the joystick to select “DRC50” or
“DRC100”, and press “
(OK)”.
5) Press “MENU” button to return to normal screen.
(In the TT mode, the menu is switched to the Service menu)
3. Selection of Screen Format
The 16 : 9 mode is selected only when the DRC100 (PAL) mode
is active.
1) Press “
(BLUE)” button on the commander.
2) Press v or V key on the joystick to select “4 : 3” or “16 : 9”,
and press “
(OK)” button. At this time, normal screen
comes back. (In the TT mode, the menu is switched to the
Service menu.)
5-1-2. How to Enter TT Mode
1. Turn on the main power switch to place this set in standby
mode. (LED will light in red.)
2. Press the buttons on commander as follows, and the TT
mode will be selected.
“TT - -” will appear in the top right corner of the screen.
Other status information will also be displayed.
3. If “
(TV MODE)” button or “-” + “-” button is pressed,
the set exits from the TT mode and returns to normal TV mode.
5-1-3. How to Enter Service Menu
1. Select TT mode.
2. Press “MENU” button on the commander once, and normal
menu screen will appear, or press it once more, and the fol-
lowing service menu screen will appear.
3. Following the screen, press v or V key on the joystick to
select the desired item, and press B key to enter the selected
item.
4. Press v or V key on the joystick to change data of each item,
and press “
(OK)” button to write changed data.
(Except Projector Engine mode)
5. To return from each item, press b key on the joystick. Or, to
return to the TT mode, press the “MENU” button.
(Except Projector Engine mode)
RM 903
PROGR
MENU
1
4
7
2
5
8
0
3
6
9
VIDEO
TV
TV STANDBY
ON SCREEN
DISPLAY
DISPLAY
SCREEN
FORMAT
FORMAT
4:3/16:9
MUTE
TV MODE
VOLUME +
JOYSTICK
MENU
SONY
RM-903
OK
TV
Enter the
“TT MODE”
5
(DIGIT 5)
(VOLUME +)
(TV MODE)
ON SCREEN
DISPLAY
( )
Service AE5(A)
Initialising
Reset Devices
Monitoring
Device Register Setting
Special Adjustment
Reset Devices
Monitoring
Device Register Setting
Special Adjustment
Select :
v V
Next menu :
B
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