Sharp LC-13B2U, Руководство по обслуживанию

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14
LC-13B2U
3. Cancel of special mode
Turn off the main unit power.
4. Adjustments
1 B+ Adjustment
(R3760)
2 Model and Inch Size
setup
(If E
2
PROM is replaced)
(IC2004)
3 Counter-bias adjustment
4 Checking and modifying
the settings
(after replacing the
E
2
PROM)
Adjustment Adjusting conditions Adjusting method
1. Connect the DC voltmeter to
pin 38 of SC3403.
1. Go to the adjustment mode.
1. Receive a B/W channel.
2. Go to the adjustment mode.
3. Select the "COM BIAS" with
[MENU] key.
1. Go to the adjustment mode and
check the following settings.
»
PRE SCALE FM/AM-M 17
»
PRE SCALE SCART 15
»
TV GEQ BAND 1 +1.0
»
TV GEQ BAND 2 0.0
»
TV GEQ BAND 3 0.0
»
TV GEQ BAND 4 -1.5
»
TV GEQ BAND 5 -2.0
»
EXT GEQ BAND 1 +1.0
»
EXT GEQ BAND 2 0.0
»
EXT GEQ BAND 3 0.0
»
EXT GEQ BAND 4 -1.5
»
EXT GEQ BAND 5 -2.0
1. Adjust the "B+ Adj" value to
5.0 ±0.02V with R3760.
1. Select "MODEL" with [MENU] key
and adjust to "B2U" with [VOL+] or
[VOL-] key.
* The color of "MODEL" must be yellow.
2. Select "INCH SIZE" and adjust to
"13" with [VOL+] or [VOL-] key.
* The color of "INCH SIZE" must be
yellow.
1. Adjust "COM BIAS" to the darkest
screen with [VOL+] and [VOL-] key.
* The color of "COM BIAS" must be
yellow.
1. See if all the settings are as
specified. If not, select an item in
question with [VOL+] or [VOL-] key
and adjust the setting as shown at
left.
* An item selected will be highlighted
in yellow.