— 14 —
KV-27FS13/ 27FS17/ 27FV17/ 29FV17/ 29FV17C/ 32FS13/ 32FS17/ 34FS13C/ 34FS17
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 R564 component marked with
X
.
+
IABL
ABL
T505
FBT
range
-
ampmeter
3.0 mA DC
A
3-2. B+ VOLTAGE CONFIRMATION AND
ADJUSTMENT
Note: The following adjustments should always be performed when
replacing the following components, 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/ -0.0 VAC
2. Input a monoscope pattern.
3. Set the PICTURE and the BRIGHTNESS controls to minimum.
4. Confi rm the voltage of A Board TP-600 is <136.5 VDC.
5. If step 4 is not satisfi ed, replace the components listed above, then
repeat Steps 1 – 3.
SECTION 3: SAFETY RELATED ADJUSTMENTS
3-1.
X
R564 CONFIRMATION METHOD
(HOLD-DOWN CONFIRMATION) AND
READJUSTMENTS
The following adjustments should always be performed when replacing
the following components which are marked with
Y
on the schematic
diagram:
Part Replaced ( )
Adjustment ( )
DY, T505, CRT, IC501 C507,
C520, C505, C509, C515, T504,
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525....................A Board
IC301........................MA Board
HV HOLD-DOWN
R564
PREPARATION BEFORE CONFIRMATION
1. Using a Variac, apply AC input voltage: 120 ±2 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 between C546 (+) or TP503 and ground is
more than 21.0 VDC (27/29 inch) or 23.0 VDC (32/34 inch).
HOLD-DOWN OPERATION CONFIRMATION
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
the next page).
2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum:
IABL = 1730 ± 100µA. (27/29 inch) or 2175 +100 - 325µA (32/34inch).
3. Confi rm the voltage of A Board TP-600 is 135 ± 1.5 VDC.
4. Connect the digital voltmeter and the DC power supply via Diode
1SS119 to C546 (+) and ground (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 24.78 +0/ -0.1 VDC
[27/29 inch] or 27.24 +0/-0.1 VDC [32/34 inch]).
8. Input a white signal and set PICTURE and BRIGHTNESS to
maximum: IABL = 1730 ± 100µA (27/29 inch) or 2175 +100/-325 µA
(32/34 inch).
9. Repeat steps 4 to 7.
Содержание KV-27FS17 - 27" Fd Trinitron Wega
Страница 130: ...User Guide ...
Страница 178: ......
Страница 179: ......
Страница 180: ......
Страница 181: ......
Страница 182: ...User Guide Sony Corporation Printed in USA ...
Страница 184: ...Guía del usuario ...
Страница 192: ...Guía del usuario ...
Страница 194: ...Guía del usuario ...
Страница 237: ......
Страница 238: ...User Guide Sony Corporation Impreso en EE UU ...
Страница 240: ...Guía del usuario ...
Страница 248: ...Guía del usuario ...
Страница 250: ...User Guide ...
Страница 263: ......
Страница 293: ......
Страница 294: ...User Guide Sony Corporation Impreso en EE UU ...