Set-Up Adjustments; Screen Voltage Adjustment (Rough Alignment); Focus Lens Adjustment; Screen (G2) Adjustment - Sony KP-53XBR300 Service Manual

KP-53XBR300/61XBR300
RM-Y902
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 block 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.
R G
SCREEN
R G
FOCUS
FOCUS block

3-2. FOCUS LENS ADJUSTMENT

In this adjustment, use the remote commander in the
service mode.
For details of the usage of the service mode and the remote
commander, please refer the item 3-9. ELECTRICAL
ADJUSTMENT BY REMOTE COMMANDER.
1. Loosen the lens screw.
2. Set to the service mode.
3. Receive the all-white signal.
4. Set MCP1 07 RON to "000", 08 GON to "001" and 09 BON
to "000" to show only the green color.
5. Set to PJE, and press 6 to display the test signal (crosshatch)"
on the screen.
6. Turn the green lens to adjust to the optimum focus point with
the test signal.
7. Tighten the lens screw.
8. Set MCP1 07 RON to "001", 08 GON to "000" and 09 BON
to "000" to show only the red color.
9. Set to PJE, and press 6 to display the test signal (crosshatch)"
on the screen.
10. Adjust red CRT lens just the same as green.
11. Set MCP1 07 RON to "000", 08 GON to "000" and 09 BON
to "001" to show only the blue color.
Test signal
12. Set to PJE, and press 6 to display the test signal (crosshatch)"
on the screen.
13. Adjust blue CRT lens just the same as green.
RM-Y902

SET-UP ADJUSTMENTS

B
B
Fig. 3-1
Fig. 3-2
SECTION 3
*: Every time you press 6, the test signal changes to
"crosshatch+video signal" - "dots+video signal" -
"crosshach(black)" - "dots(black)" - off.
Note: Instead of items 4, 8 and 11, you can use the lens caps to cut
off the unnecessary color beams.

3-3. SCREEN (G2) ADJUSTMENT

1. Select VIDEO1 mode without signals.
2. Connect an oscilloscope to the TP7103(KR), TP7203(KG) and
TP7303(KB) of CR board, CG board and CB board.
3. Adjust R, G and B screen voltage to 175 ± 2V with screen VR
on the Focus block.
GND

3-4. FOCUS VR ADJUSTMENT

1. Set to the service mode.
2. Receive the all-white signal.
3. Set MCP1 07 RON to "000", 08 GON to "001" and 09 BON
to "000" to show only the green color.
4. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
5. Turn the green VR on the focus block to adjust to the optimum
focus point with the test signal.
6. Set MCP1 07 RON to "001", 08 GON to "000" and 09 BON
to "000" to show the red color.
7. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
8. Turn the red VR on the focus block to adjust to the optimum
focus point with the test signal.
9. Set MCP1 07 RON to "000", 08 GON to "000" and 09 BON
to "001" to show the blue color.
10. Set to PJE, and press 6 to display the test signal (crosshatch)
on the screen.
11. Turn the blue VR on the focus block to adjust to the optimum
focus point with the test signal.
Note: Instead of items 3, 6 and 9, you can use the lens caps to cut
off the unnecessary color beams.
Lens
– 42 –
175 ± 2V
pedestal level
Fig. 3-3
Scanning line visible.
A
Minimize both A and B.
B
Fig. 3-4
Center of crosshatch
Fig. 3-5