Read Sony KV-36FS12 Service Manual online
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KV-36FS12/36FS16/36FV16/36FV26
Preparation before Confirmation
1. Using a Variac, apply AC input voltage: 130+2.0/-0.0 VAC.
2. Turn the POWER switch ON.
3. Input a white signal and set the PICTURE and BRIGHT
controls to maximum.
4. Confirm that the voltage of more than 23.0 VDC appears
between TP85 and ground on the A Board.
Hold-Down Operation Confirmation
1. Connect the current meter between Pin 11 of the FBT
(T503) and the PWB land where Pin 11 would normally
attach (See Figure 1 above).
attach (See Figure 1 above).
2. Input a dot signal and set PICTURE and BRIGHTNESS
to minimum: IABL = 2175 + 100/ -325 µA.
3. Confirm the voltage of A Board TP91 is 135 ± 1.5 VDC.
4. Connect the digital voltmeter and the DC power supply to
TP85 and ground. (See Figure 1 above).
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 = 27.24 + 0.0/ - 0.1 VDC).
8. Input a white signal and set PICTURE and BRIGHTNESS
to maximum: IABL = 2175 + 100/ -325 µA.
9. Repeat steps 4 to 7.
SECTION 4
SAFETY RELATED ADJUSTMENTS
4-1.
R530, R531 CONFIRMATION METHOD
(HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
READJUSTMENTS
Always perform the following adjustments when replacing the
following components marked with a
following components marked with a
mark on the schematic
diagram:
Hold-Down Readjustment
If the setting indicated in Step 2 of Hold-Down Operation
Confirmation cannot be met, readjustment should be performed
by altering the resistance value of R530, R531 component
marked with
Confirmation cannot be met, readjustment should be performed
by altering the resistance value of R530, R531 component
marked with
.
Figure 1
3mA DC range
+
-
+
-
A
+
-
11
T503
FBT
FBT
TP85
T503
FBT
FBT
TP85
R531
R530
DC Power Supply
digital multimeter
ammeter
4-2. B+ VOLTAGE CONFIRMATION AND
ADJUSTMENT
ADJUSTMENT
Note: The following adjustments should always be performed
when replacing the following components, which are marked
with on the schematic diagram on the G Board.
when replacing the following components, which are marked
with on the schematic diagram on the G Board.
G BOARD:
IC643, R661
1. Using a Variac, apply AC input voltage: 130 + 2.0/-0.0 VAC
2. Input a monoscope signal.
3. Set the PICTURE control and the BRIGHT control to
initial reset value.
4. Confirm the voltage of G Board CN641 between
pin
to ground is less than 136.5 VDC.
5. If step 4 is not satisfied, replace the R661and repeat the
above steps.
Part Replaced ( )
Adjustment ( )
R387, R550, R529, R530, R531,
R532, R533, D519, D520, D521,
IC501, C531, C532, T503, IC351,
IC355, Q301, R356, R359, R361,
D302 ............................... A Board
R532, R533, D519, D520, D521,
IC501, C531, C532, T503, IC351,
IC355, Q301, R356, R359, R361,
D302 ............................... A Board
IC643, R661 .................. G Board
HV HOLD-DOWN
R530, R531
R530, R531
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