Sony KV-21FS105 (serv.man2) Service Manual ▷ View online
14
KV-21FS105
KV-21FS105
2-5. METHOD OF SETTING THE SERVICE
ADJUSTMENT MODE
Service Mode Procedure
1. Standby mode (power off).
2. DISPLAY
Î
Channel 5
Î
Sound Volume +
Î
Power on the
Remote Commander (Press each button within one second.)
Service Adjustment Mode In
1. The CRT displays the item being adjusted.
SERVICE
HSIZ
Display
Item
Mode
Item
Data
Data
0
2. Press 1 or 4 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. To save into memory, press MUTING then ENTER .
Service Adjustment Mode Memory
To exit service adjustment mode, turn the set off then on.
ENTER
MUTING
SERVICE
WRITE
2-6. WHITE BALANCE ADJUSTMENTS
1. Input an entire white signal with burst.
2. Set to Service Adjustment Mode.
3. Set CDOL to “0”
4. Set the PICTURE and BRIGHTNESS to minimum.
5. Adjust with SBRT if necessary.
6. Select GCUT and BCUT with 1 and 4 .
7. Adjust by pressing 3 and 6 for the best white balance.
8. Set the PICTURE and BRIGHTNESS to maximum.
9. Select GDRV and BDRV with 1 and 4 .
10. Adjust by pressing 3 and 6 for the best white balance.
11. Reset DCOL to “1”.
12. To save into memory, press MUTING then ENTER .
15
KV-21FS105
KV-21FS105
SECTION 3: SAFETY RELATED ADJUSTMENTS
3-1. X R562 CONFIRMATION METHOD
(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:
Part Replaced ( )
Adjustment ( )
HV HOLD-DOWN
(R562)
(R562)
DY, T505, CRT, IC1301, IC501, C507,
C520, C505, C509, C515, T504,
L508, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525........................A Board
C520, C505, C509, C515, T504,
L508, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525........................A Board
Preparation Before Confi rmation
1. Using a Variac, apply AC input voltage: 120-220 +/- 2.0 VAC.
2. Turn the POWER switch ON.
3. Input a white signal and set the PICTURE and BRIGHTNESS
controls to maximum.
4. Confi rm that the voltage of more than 97 VDC appears between
C546(+) or TP503 and ground on the A Board.
Hold-Down Operation Confi rmation
1. Connect the current meter between Pin 11 of the FBT (T505) and the
PWB land where Pin 11 would normally attach.
(See Figure 1 on next page).
(See Figure 1 on next page).
2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum:
IABL = 100 ± 100 µA.
3. Confi rm the voltage of A Board TP600 is 135 ± 1 VDC.
4. Connect the digital voltmeter and the DC power supply via diode
1SS119 to C546 (+) and ground.
(See Figure 1 on next page).
(See Figure 1 on next page).
5. Increase the DC power voltage gradually until the picture blanks out.
6. Turn DC power source off immediately.
7. Read the digital voltmeter indication (standard = 115.7 VDC).
8. Input a white signal and set PICTURE and BRIGHTNESS to
maximum: IABL = 1350 ± 100 µA.
9. Repeat steps 4 to 7.
Hold-Down Readjustment
If the setting indicated in Step 2 of Hold-Down Operation Confi rmation
cannot be met, readjustment should be performed by altering the
resistance value of the R562 component marked with X.
cannot be met, readjustment should be performed by altering the
resistance value of the R562 component marked with X.
+
IABL
ABL
T505
FBT
range
-
ammeter
3.0 mA DC
A
3-2. B+ VOLTAGE CONFIRMATION AND
ADJUSTMENTS
Always perform the following adjustments when replacing the components
which are marked with Y on the schematic diagram on the A Board:
which are marked with Y on the schematic diagram on the A Board:
A BOARD: IC601, PH601
1. Using a Variac, apply AC input voltage: 130 ± 2.0 VAC
2. Input a dot signal.
3. Set the PICTURE control and the BRIGHTNESS control to minimum.
4. Confi rm the voltage on A Board between TP-600 and ground is less
than 136 VDC.
5. If step 4 is not satisfi ed, replace the components on A Board listed
above, and then repeat the steps 1-4.
16
KV-21FS105
KV-21FS105
T505
FBT
ABL11
R562
AMMETER
3mA dc range
+
–
A
1SS119
C546
DIGITAL
MULTIMETER
+
–
POWER
SUPPLY
+
–
–
FIGURE 1
17
KV-21FS105
KV-21FS105
4-1. SETTING 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 In
1. The CRT displays the item being adjusted.
SERVICE
HSIZ
Display
Item
Mode
Item
Data
Data
0
2. Press 1 or 2 on the Remote Commander to select an item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. To save into memory, press MUTING then ENTER .
Service Adjustment Mode Memory
ENTER
MUTING
SERVICE
WRITE
1. Press 8 then ENTER on the Remote Commander to initialize.
Carry out Step 1 when adjusting
ID’s 0-4 and when replacing and
adjusting IC003.
ID’s 0-4 and when replacing and
adjusting IC003.
SERVICE
RESET
2. To exit Service Adjustment mode, turn set off then on..
SECTION 4: CIRCUIT ADJUSTMENTS
ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER
Use the Remote Commander (RM-Y173) to perform the circuit adjustments in this section.
Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator
4-2. MEMORY WRITE CONFIRMATION
METHOD
1. After adjustment, remove 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
RM-Y173
POWER
(Service Mode)
3
Item
(Data up)
(Data up)
5
(Device item
down)
(Device item
down)
ENTER
(Enter into
memory)
memory)
0
(Remove from
memory)
memory)
6
Item
(Data down)
(Data down)
DISPLAY
(Service Mode)
MUTING
(Enter into
memory)
memory)
2
(Device Item Up)
4
Disp. (Item down)
8
(Initialize)
1
Disp. (Item up)
VOLUME (+)
(Service Mode)
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