Sharp 29WF200, Service Manual

Page: 8 / 68

8
29WF200
29WF500
8-1
8-2
F
ACT
OR
Y
-SET9
R/C
238 (Eeh)
S-SYSTEM
B/G
LANGUAGE SELECT
ENGLISH
SHIPPING SETTING & CHECKING
MODE
1
2
3
SOFT
S
T
ANDARD
DYNAMIC
CONTRAST
50
60
60
COLOUR
-5
0
1
0
BRIGHT
0
0
0
TINT
0
0
0
SHARPNESS
-5
0
5
PEICTURE NR
ON
OFF
OFF
WHITE TEMP
0
0
0
SURROUND
OFF
OFF
ON
TREBLE
#
#
#
BASS
#
#
#
S-BOOSTER
OFF
ON
ON
# SER
VICE MODE DA
T
A
ITEM
D
A
T
A
SETTING
LAST
POWER
ON
LAST
TV/A
V
MODE
TV
LAST CH
CH1
FLASH BACK
CH1
F
A
VORITE CH1
CH10
F
A
VORITE CH2
CH20
F
A
VORITE CH3
CH30
F
A
VORITE CH4
CH40
1 DIGIT/2 DIGIT
2 DIGIT
VOLUME
0
ROT
A
TION
0
SA
VE
OFF
A
V
MODE
2
BALANCE
0
BLUE BACK
OFF
ITEM
DA
T
A
SETTING
VM
ON
TEXT
1
ON TIMER
IN
ACTIVE
ON TIMER
CH
IN
ACTIVE
ON TIMER
VOLUME
IN ACTIVE
REMINDER
IN ACTIVE
AFT
ALL CH ON
COLOUR SYSTEM
ALL
CH
AUT
O
SKIP
ALL CH OFF
NICAM ON/OFF
ALL CH ON
NICAM STEREO MODE
ALL CH STEREO
NICAM BILINGUAL MODE
ALL CH M1
A2
ON/OFF
ALL CH ON
A2 STEREO MODE
ALL
CH
STEREO
A2 BILINGUAL MODE
ALL CH MAIN
(1)
The following default data has been factory-setting for the EEPROM.
(2) Normal setting for
A
V
MODE.
PIF ADJUSTMENT
No.
Adjusting point
Adjusting condition/procedure
W
aveform or others
TUNER IFT ( PRESET ) TU200
1
1
.
Get the tuner ready to receive the CH. E -9 signal,but with no signal input. Adjust the PLL data.
2
.
Connect the sweep generator's output cable to the tuner antenna. ( RF SWEEP )
3.
Adjust the sweep generator's to 80dB
µ
V.
4
.
Connect the response lead ( use LOW IMPED- ANCE probe with wave detector ; see Fig.1 ) to the tuner's IF output terminal. (
This terminal must
have the probe alone connected ).
5.
Set the RF
AGC to 0 - 6 V with no saturation with
the waveform.
6.
Adjust the tuner IF coil to obtain the waveform as shown in Fig. 2.
Note:
Be sure to keep the tuner cover in position during this adjustment.
RF-AGC T
AKE OVER
POINT AD- JUSTMENT (I
2
C BUS
CONTROL)
1.
Receive "P
AL
COLOUR BAR" signal.
»
Signal Strength: 54
±
1 dB
µ
V (75 ohm open)
2
.
Connect the oscilloscope to
TP51 (T
uner
’s
AGC
T
erminal) as shown in Fig. 3.
3.
Call "RF-AGC" mode in service mode.
Adjust the
"RF-AGC" bus data to obtain the
T
uner output pin
drop
0.1V ~ 1.0V
below maximum voltage.
4
.
Change the antenna input signal to 63~67dB
µ
V,
and make sure there is no noise.
5
.
T
urn up the input signal to 90~95 dB
µ
V to be sure
that there is no cross modulation beat.
Note: For the 50 W signal
strength gauge, when not us- ing 50/75 impedance adapter
,
signal strength is 52
±
1dB
µ
V(75 W open), in-
stead of 54
±
1dB
µ
V (75 W
open).
Precaution:
The loss of using
impedance adapter
.
2
»
Bias box:
About 4.5 V
Oscilloscope
0.1V
~1.0V
TV Set
Bias box
TP51
+
+
—
—
Fig. 3
E-9 CH
P
C
10k 100k
1n60
75ohm
IF OUT
-1.5+/-0.8dB
1000p
1000p
Oscilloscope
Fig.1
Fig.2