Sharp LC-10A3E (serv.man2) Service Manual ▷ View online
9
LC-10A3E
ADJUSTING PROCEDURE OF EACH SECTION
The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust
as follows.
as follows.
1. Preparation for Adjustments
(1)Use the exclusive-use AC adapter or stable DC power supply.
AC adapter: UADP-0225CEPZ
DC power supply: 12 ± 0.5V
DC power supply: 12 ± 0.5V
2. Special mode setting procedure
(1)Adjustment mode
[Procedure]
• Short-circuit TP2001 to GND, and turn on the power.
• Or short-circuit TP2002 to GND, and turn on the power.
• Or holding down the [TV/VIDEO] key and [MENU] key, turn on the main power, and simultaneously press the
(inspection process) [CH
"
] key and [VOL– ] key to change the mode to the adjustment mode.
• Each adjustment item is chosen with the [MENU] key, and adjusted with the [VOL] key.
[Description]
The manual adjustment or adjustment through communication with the automatic machine is performed.
(2)Inspection mode
[Procedure]
Holding down the [TV/VIDEO] key and [MENU] key, turn on the power.
[MENU] key is pushed and made inspection mode.
[Description]
• In the ordinary menu select with the [CH] key, and decide with the [VOL] key. Then select “PICTURE”, “TINT (only
NTSC)”, “COLOUR”, “BLACK LEVEL”, “SHARPNESS”, “RED-BLUE”, “GREEN” and “COLOUR SYSTEM” with the
[CH] key, and decide with the [VOL] key. After that, adjust values with the [VOL] key.
• VOLUME, PICTURE, TINT (only NTSC), COLOUR, BLACK LEVEL, SHARPNESS, RED-BLUE, GREEN change as
follows.
(3)Shipping setting mode
[Procedure]
Holding down the [TV/VIDEO] key and [MENU] key, turn on the main power, and simultaneously press the (inspection
process) [CH
'
] key and [VOL+] key to change the mode to the shipping setting mode.
[Description]
User adjustment and other values are taken as defaults.
If TV is indicated as SETTING COMPLETE, setting has been completed.
3. Cancel of special mode
Turn off the main unit power.
4. Initialization
Here is the procedure of initializing the EEPROM and making model number and size settings.
4-1. Get Pins (81) and (82) of the IC2001 (microprocessor) grounded and turn on the power.
4-2. Select a model number (A1, A2H, A2U, A3E). For Model LC-10A3E select A3E.
4-3. Select a size in inches (10, 12, 15, 20). For Model LC-10A3E select 10.
4-4. Get Pins (81) and (82) of the IC2001 (microprocessor) back to normal.
4-1. Get Pins (81) and (82) of the IC2001 (microprocessor) grounded and turn on the power.
4-2. Select a model number (A1, A2H, A2U, A3E). For Model LC-10A3E select A3E.
4-3. Select a size in inches (10, 12, 15, 20). For Model LC-10A3E select 10.
4-4. Get Pins (81) and (82) of the IC2001 (microprocessor) back to normal.
û
Min.
Û
û
Center
Û
û
Max.
Û
10
LC-10A3E
5. Reset of lamp error
If the power LED remains red and the power is not turned on, or if repair has been performed, enter the adjustment
mode to reset the lamp error.
For the resetting procedure, refer to " No power" in the "Trouble shooting Table" section.
mode to reset the lamp error.
For the resetting procedure, refer to " No power" in the "Trouble shooting Table" section.
t remote controller:
6. Adjustments
6-1. +B adjustment
Vary the “+B-ADJ” setting on Page 1 of the adjustment process so that the voltage at pin 49 of SC401 be 5.00
±0.02 V.
Note : Adjust precisely to 5.0 V because this level will be used as supply voltage reference.
±0.02 V.
Note : Adjust precisely to 5.0 V because this level will be used as supply voltage reference.
6-2. Counter-bias adjustment
Vary the “COM BIAS” setting on Page 2 of the adjustment process so that the contrast be sharpest (black
looks most sinking). The adjustment guideline is around 114 for Model LC-10A3E.
looks most sinking). The adjustment guideline is around 114 for Model LC-10A3E.
6-3. TAMP adjustment
1) Receive the colour bar signal.
2) See if the "Y" reading on page 2 of the adjustment process is somewhere between BO and BA. If not, make
2) See if the "Y" reading on page 2 of the adjustment process is somewhere between BO and BA. If not, make
the "PAL TAMP" adjustment to get the "Y" reading in the range of BO thru BA.
(Adjustment process menu on-screen display on page 2)
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
2
C O M
B
I
A S
1
1
7
P A
L
2
7
T
A M P
T
A
P
M
H
A
B
T
A M P
L
B
0
T
V
H
-
P E A K
I
N G
3
R C U T O F
F
0
G C U T O F
F
0
B C U T O F
F
–
1
G 3
B
3
R
3
0
0
0
0
0
0
G 1
B
4
Y
0
0
0
0
B
5
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Y Data (75% white )
6-4. White balance adjustment
Vary the “RCUTOFF” and “BCUTOFF” settings to achieve optimum white balance.
Note : For the “RCUTOFF” and “BCUTOFF” settings, keep the readings in the range of -10 to +10. If out of
Note : For the “RCUTOFF” and “BCUTOFF” settings, keep the readings in the range of -10 to +10. If out of
this range, the user-adjustable range is reduced.
11
LC-10A3E
7. OSD Menu (for pages 1 and 2)
Page
Item
MIN
MAX
Remarks
1
+B-ADJ
0
255
160
Refer to 5-1
MODEL
A3E
Refer to 4-2
INCH SIZE
10
Refer to 4-3
TIMER
1
SYSTEM
PAL
NTSC PWM FREQ
000
FFF
0C0
PAL PWM FREQ
000
FFF
0BD
TV GAIN
OFF
ERROR NO RESET
0
PMUTE
00
2
COMBIAS
0
255
117
Refer to 5-2
PAL TAMP
0
63
27
TV H-PEAKING
0
63
27
R CUT OFF
0
7
0
Refer to 5-3 (around -5)
G CUT OFF
-15
+15
0
B CUT OFF
-15
+15
-1
Refer to 5-3
TAMP H
00
FF
BA
TAMP L
00
FF
B0
G3
-15
+15
0
B3
00
FF
00
R3
00
FF
00
G1
00
FF
00
B4
00
FF
00
Y
00
FF
00
Initial
Setting
11
LC-10A3E
7. OSD Menu (for pages 1 and 2)
Page
Item
MIN
MAX
Remarks
1
+B-ADJ
0
255
160
Refer to 5-1
MODEL
A3E
Refer to 4-2
INCH SIZE
10
Refer to 4-3
TIMER
1
SYSTEM
PAL
NTSC PWM FREQ
000
FFF
0C0
PAL PWM FREQ
000
FFF
0BD
TV GAIN
OFF
ERROR NO RESET
0
PMUTE
00
2
COMBIAS
0
255
117
Refer to 5-2
PAL TAMP
0
63
27
TV H-PEAKING
0
63
27
R CUT OFF
0
7
0
Refer to 5-3 (around -5)
G CUT OFF
-15
+15
0
B CUT OFF
-15
+15
-1
Refer to 5-3
TAMP H
00
FF
BA
TAMP L
00
FF
B0
G3
-15
+15
0
B3
00
FF
00
R3
00
FF
00
G1
00
FF
00
B4
00
FF
00
Y
00
FF
00
Initial
Setting
