Sony KV-34FV310 (serv.man2) Service Manual ▷ View online
— 14 —
KV-34FV310/38FV310
DYNAMIC CONVERGENCE ADJUSTMENT
Before starting, perform Vertical and Horizontal Static Convergence
Adjustment.
Adjustment.
1. Slightly loosen defl ection yoke screw.
2. Remove defl ection yoke spacers.
3. Move the defl ection yoke for best convergence as shown below:
R G B
B G R
R
G
G
B
R
G
B
B G R R G B
R G B
R
R
R
G
B
G
B
G
B
R G B
B G R
4. Tighten the defl ection yoke screw.
5. Install the defl ection yoke spacers.
TLH PLATE ADJUSTMENT
Preparation:
• Input crosshatch pattern.
• Input crosshatch pattern.
• Adjust Picture Quality to standard, Picture and Brightness to 50%, and
Other to standard.
• Adjust the Horizontal Convergence of red and blue dots by tilting the
TLH plate on the defl ection yoke.
XCV
V Board
RV701
V.STAT
Y Magnet
TLH Plate
H-TRP
YCH
TLV
C Board
TLH+
TLH-
TLH-
B R
(R)(B)
(R)(B)
R B
(B)(R)
(B)(R)
1. Adjust XCV core to balance X axis.
2. Adjust YCH VR to balance Y axis.
3. Adjust vertical red and blue convergence with V.TILT (TLV VR.)
Perform adjustments while tracking items 1 and 2.
4. Adjust Y MAGNET to correct V.BOW Geometry Distortion.
5. Adjust H-TRP to correct H.Trapezoid Geometry Distortion.
After adjusting items 4 and 5, confi rm overall geometry again.
SCREEN-CORNER CONVERGENCE
1. Affi x a permalloy assembly corresponding to the misconverged areas:
b
a
c
d
a
b
a-d: screen-corner
misconvergence
c
d
2-3. FOCUS
1. Input monoscope signal.
2. Set user controls to normal.
3. Set video mode to STANDARD.
4. Set the PICTURE to maximum.
5. Adjust at 325 Mark for best center/corner focus balance.
6. Receive an entire white signal. Make sure Magenta Ring is at an
acceptable level.
Focus
Screen (G2)
35
325
35 MARK
325 MARK
CENTER
CIRCLE
— 15 —
KV-34FV310/38FV310
2-4. SCREEN (G2)
1. Input dot pattern from the pattern generator.
2. Set the user controls to NORMAL.
3. Attach the G2-Jig to the C Board.
4. Adjust RCUT, GCUT, BCUT, and SBRT in service mode with an
oscilloscope so that voltages on the red, green, and blue cathodes
are 170 ± 4.0Vdc.
are 170 ± 4.0Vdc.
5. Observe the screen and adjust SCREEN (G2) VR to obtain the
faintly visible background of dot signal.
6. Push the TEST + JUMP (+ Channel) to cut off the signal. The screen
should be bright or dark. Brightness of raster must be increased
when adjusting.
when adjusting.
7. Adjust screen VR until the screen is slightly cut off, or scarcely lights
up. A signal cannot be seen when the brightness of the raster is high.
8. Push the JUMP again to release the cut off.
.
pedestal
GND
170Vdc
170 + 4.0 Vdc
2-5. WHITE BALANCE ADJUSTMENTS
Adj.
NO. Disp.
Item
All Models
VID_ADJ
0
RDRV
Red Drive
41
VID_ADJ
1
GDRV Green Drive
32
VID_ADJ
2
BDRV
Blue Drive
29
VID_ADJ
3
RCUT
Red Cut-off
31
VID_ADJ
4
GCUT Green Cut-off
14
VID_ADJ
5
BCUT
Blue Cut-off
17
VP2
4
SBRT
Sub Bright
16
1. Set program palette to STANDARD and push RESET.
2. Input an entire white signal.
3. Set to Service Adjustment Mode.
4. Set the PICTURE and BRIGHT to minimum.
5. Adjust with SBRT if necessary.
6. Set RCUT to “14”.
7. Select GCUT and BCUT with 3 and 5 .
8. Adjust by pressing 1 and 4 for the best white balance.
9. Set the PICTURE and BRIGHT to maximum.
10. Select GDRV and BDRV with and .
11. Adjust with 3 and 6 for the best white balance.
12. Write into the memory by pressing 3 then 5 .
13. Repeat steps 1-12 for GDR4, BDR4, GCU4 and BCU4 using
Video 4 input.
* Use values from Sub Contrast Adjustments
White balance should be adjusted after Sub Contrast because
RDRV is also used in Sub Contrast Adjustment. (See page 26)
RDRV is also used in Sub Contrast Adjustment. (See page 26)
— 16 —
KV-34FV310/38FV310
HV PROTECTOR CHECK-HIGH LIGHT
CONDITION
1. Short across C8002, C8021, C8301, C8012 and C8015.
2. Open pin 10 (ABL) of IC301 (YCJ).
3. Set video to white fi eld. Set HV current load to iabl = 3.04 ± 0.05mA
for 34/38” by adjusting picture and brightness to maximum condition.
4. Adjust VR jig to obtain 34.25 ± 0.2kV for 34/38”.
5. Remove short from C8002 and confi rm that hold down activates.
6 Short C8002 again and confi rm that HV recovers.
7 Then readjust precision VR jig to obtain 32.0 ± 0.2kV for 34/38”.
8. Remove shorts from C8002, C8021 and C8301.
9. Confi rm that hold down does not activate.
10.Remove shorts from C8012, C8015.
SECTION 3: SAFETY RELATED ADJUSTMENTS
3-1. X RV8002 CONFIRMATION METHOD
(HV HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
READJUSTMENTS
Always perform the following adjustments when replacing the following
components marked with a Y mark on the schematic diagram:
components marked with a Y mark on the schematic diagram:
D BOARD:
HV HOLD DOWN
D8022, IC8001, IC8004, IC8005,
RV8002
IC8104, R8014, R8015, R8016,
R8017, R8019, R8021, R8046,
R8052, R8072, R8078, R8079,
R8082, R8091, R8095
GW BOARD:
IC601
R8017, R8019, R8021, R8046,
R8052, R8072, R8078, R8079,
R8082, R8091, R8095
GW BOARD:
IC601
Part Replaced (Y)
Adjustment (X)
PREPARATION BEFORE CONFIRMATION
Equipment: HV meter, DVM, Analog Current meter.
Condition: AC input voltage: 130 (+ 2) VAC.
Set condition: Reset condition.
Signal Input: All black video signal for Cut off, All white signal for High
light.
light.
HV PROTECTOR CHECK-CUT OFF
CONDITION
1. Remove D board and carefully lift as necessary to gain access to the
bottom of the board. Open ABL pin 1 on RHT (T8001) and connect
analog current meter.
analog current meter.
2. Make Cut Off condition. Input all black video signal and set picture
and brightness to min., ABL current should be approximately 0.16 ±
0.05mA for 34/38”.
0.05mA for 34/38”.
3. Short across C8002, C8021 and C8301.
4. Turn off the set and install precision VR jig (initially set to 100K) to IC
8005 pin 1 and GND (C8076 -). Restore power and adjust to obtain
36.0 ± 0.2kV for 34/38”.
36.0 ± 0.2kV for 34/38”.
5. Remove short from C8002 and confi rm that hold down activates.
6. Short C8002 again and confi rm that HV recovers.
7. Then readjust precision VR jig to obtain 32.5 ± 0.2kV for 34/38”.
8. Remove short from C8002, C8021 and C8301.
9. Confi rm that hold down does not activate
.
— 17 —
KV-34FV310/38FV310
4-1. SETTING THE SERVICE ADJUSTMENT
MODE
1. Standby mode (Power off).
2. Press the following buttons on the remote commander within a
second of each other:
DISPLAY
Channel 5
Sound Volume +
Power
SERVICE ADJUSTMENT MODE ON
Disp.
(Item)
(Item)
Item
data
data
0
VP
HSIZ
HSIZ
7
TV
Item
order
order
SERVICE
Mode
1. The CRT displays the item being adjusted.
2. Press 1 or 2 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to write into memory.
SERVICE ADJUSTMENT MODE MEMORY
Disp.
(Item)
(Item)
Item
data
data
SERVICE
0
VP
HSIZ
HSIZ
7
TV
Item
order
order
1. Press 8 then ENTER on the Remote Commander to initialize.
Disp.
(Item)
(Item)
Item
data
data
WRITE
0
VP
HSIZ
HSIZ
7
TV
Item
order
order
Carry out Step 1 when adjusting
ID’s 0-7 and when replacing and
adjusting IC003.
ID’s 0-7 and when replacing and
adjusting IC003.
2. Press MUTING then ENTER to write into memory.
3. DO NOT turn off set until SERVICE appears.
4-2. MEMORY WRITE CONFIRMATION
METHOD
1. After adjustment, pull out the plug from the AC outlet, then replace
the plug in the AC outlet again.
2. Turn the power switch ON and set to Service Mode.
3. Call the adjusted items again to confi rm they were adjusted.
4-3. REMOTE ADJUSTMENT BUTTONS AND
INDICATORS
SECTION 4: CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander (RM-Y181) to perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
RM-Y181
MUTING
(Enter into
memory)
memory)
POWER
(Service Mode)
2
(Device Item Up)
4
Disp. (Item down)
8
(Initialize)
3
Item
(Data up)
(Data up)
1
Disp. (Item up)
5
(Device item
down)
(Device item
down)
ENTER
(Enter into
memory)
memory)
0
(Remove from
memory)
memory)
VOLUME (+)
(Service Mode)
6
Item
(Data down)
(Data down)
DISPLAY
(Service Mode)
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