Sony KP-FS57M31 / KP-FS57M61 / KP-FS57M90 / KP-FS57M91 (serv.man3) Service Manual ▷ View online
– 13 –
KP-FS57M31/M61/M90/M91
RM-997
2-10. J BOARD REMOVAL
2-11. A1, E, B4, AND V2 BOARDS REMOVAL
3 Four screws
(BVTP X12)
(BVTP X12)
1 Four screws
(BVTP 3X12)
(BVTP 3X12)
4 J board
2 J board cover
5 Connector cover
1
A1 board
2
E board
4
B4 board
3
Four screws
(Hexagon head)
5
V2 board
– 14 –
KP-FS57M31/M61/M90/M91
RM-997
2-12. A, AD AND D BOARDS REMOVAL
2-13. PICTURE TUBE REMOVAL
1
A board
4
D board
3
Five screws
(BVTP 3X12)
2
AD board
6
Main bracket section
2
Three screws
(Hexagon head)
(4X20)
(4X20)
2
Three screws
(Hexagon head)
(4X20)
(4X20)
5
Two screws
(Hexagon head)
(4X20)
(4X20)
1
Two screws
(BVTP 4X16)
3
Two screws
(Hexagon head)
(4X20)
(4X20)
1
Two screws
(BVTP 4X16)
4
PICTURE TUBE
BLOCK ASSY
– 15 –
KP-FS57M31/M61/M90/M91
RM-997
2-14 HIGH-VOLTAGE CABLE
INSTALLATION AND REMOVAL
INSTALLATION AND REMOVAL
2-15. MECHASEAL
(2) Installation
(1) Remover
1
Rubber cap
2
HV cable turn 90
°
2
Rubber cap
1
HV cable
Hook
Gutter
1
Four screws
(BVTP 4X16)
5
Four screws
(BVTP 4X16)
9
Shade
*
Removing the arrow-marked screw is strictly inhibited.
If removed, it may cause liquid spill.
If removed, it may cause liquid spill.
2
CR board
3
Neck assy
4
Deflection yoke
6
Mechaseal assy
7
Two screws
(BVTP 4X16)
8
Heat sink
– 16 –
KP-FS57M31/M61/M90/M91
RM-997
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
(FINE ADJUSTMENT)
1. Turn on the power of the set.
2. Select VIDEO1 mode without signal.
3. Supply DC 175 ± 0.5 V from external power supply to KR,
2. Select VIDEO1 mode without signal.
3. Supply DC 175 ± 0.5 V from external power supply to KR,
KG or KB of CR board, CG board and CB board.(Fig.3-2)
3. Adjust red, green and blue screen voltage to until retrace
line disappears with screen VR on the focus pack.
4. Supply DC 172 ± 0.5 V from external power supply to KR,
KG or KB of CR board, CG board and CB board.(Fig.3-3)
5. Confirm if retrance can be seen.
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 of the CRT.
5. The tilt of the deflection yoke for red and blue is aligned the
same as was done for green.
Fig. 3-6
Neck Assy
Make sure deflection yoke is
touching CRT closely.
touching CRT closely.
2-pole magnet
4-pole magnet
Deflection yoke
Anode cap
Centering magnet
Fig. 3-5
Lens
Fig. 3-4
Minimize both A and B.
A
B
Scanning line visible.
3-3. FOCUS ROUGH ADJUSTMENT
1. Loose the lens screw.
2. Set in the service mode.
3. Place the caps on the red and blue lens so that only the green
2. Set in the service mode.
3. Place the caps on the red and blue lens so that only the green
color is shown.
4. Press “1” or “4” button on the commander and select
“PJE”, press “6” three times on the Commander to display
the test signal (crosshatch) on the screen.
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 in the center area.
7. Perform the same alignment for red and blue lenses and elec-
tric focus.
8. Fix lens screw.
Fig. 3-3
+
–
Power
Supply
Supply
Dummy Resister
3k ohm 20W
Fig. 3-2
Test signal
SCREEN
B
R
G
FOCUS
Focus Pack
B
R
G
Click on the first or last page to see other KP-FS57M31 / KP-FS57M61 / KP-FS57M90 / KP-FS57M91 (serv.man3) service manuals if exist.