LC-15E1E (serv.man3). Adjusting procedure and troubleshooting table — Sharp TV Service Manual (repair manual)

Model
LC-15E1E (serv.man3)
Pages
9
Size
33.97 KB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD / Adjusting procedure and troubleshooting table
File
lc-15e1e-sm3.pdf
Date

View Sharp LC-15E1E (serv.man3) Service Manual online

LC-13E1E
LC-15E1E
12
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.
Preparation for adjustments
Use the dedicated AC adaptor or stable DC power supply.
AC adaptor: UADP-A007WJPZ
DC power supply: 12V 4.0A
1. Adjusting procedure
• Checker adjustment
Power ON (Adjustment processing mode) 
→ 
+B adjustment 
 Counter bias adjustment 
→ 
TAMP (Contrast)
adjustment
→ 
White balance adjustment
2. Entering the adjustment processing mode
There are the following two methods.
• Setting the pin (81)(KEY4) or pin (82)(KEY5) of IC2001 (microprocessor) to GND, turn on the power.
• A “POWER” key is made on with pushing an “TV/VIDEO” and “MENU” keys at the same time.(K of the inspection
process mode is displayed by the upper left of the image plane.) 
 Next, “CH (
Ù
)” and “VOL (–)” keys are pushed
at the same time.(It becomes the image plane of the adjustment process mode.).....When it is canceled, it is made
to turn it off.(Even off in the “MAIN POWER” key, off with R/C are good.)
3. Key operation in the adjustment process mode
• The receiving channel UP/DOWN is performed with the “CH (
ù
)/(
Ù
)” keys.
One push ... The UP/DOWN tuning is performed per channel.
Continuous push ... The UP/DOWN search is performed until a next receivable station is found.
• Various adjustments
The adjustment is performed for each item by the “MENU”, “Menu cursor”, “CH (
ù
)/(
Ù
)” or “VOL (+)/(–)” keys
(LCD TV set and remote control).
• Adjustment item is chosen with the Menu cursor upward/downward keys.
• The adjustment item makes a toggle operation with the “MENU” key input. (Next item)
If the “MENU” key is input while the bottom item is selected, it moves to the top item on the next page.
• Press the auto preset button on the remote controller in the adjustment process mode, and the top item of the
next page will show up regardless of which item appears now.
Page 1 
 Page 2 
 ... 
 Page 24 
 Page 1
• Press the manual memory button on the remote controller in the adjustment process mode, and the top item of
the same page will show up.
• UP/DOWN of each adjustment vale selected is performed with the VOL (+)/(–) keys input.
• For P16 – 17, the unit enters the register select mode with the VOL (+)/(–) keys input while NTSC/PAL is selected,
and the cursor moves to the address 01.
• The cursor moves up or down with the “CH (
ù
)/(
Ù
)” keys and moves left or right with the VOL (+)/(–) keys, and a
decision is made with the 12 key.
When the decision is made, the cursor moves to the adjustment value selected, and UP/DOWN of each adjustment
value selected by the “VOL (+)/(–)” keys input is performed.
 1 
 ... 
 9 
 A 
 ... 
 F 
 0 
 ...
Decide with the 12 key and return to the address select. Move to the next item with the “MENU” key.
During address select, the cursor movement by the “VOL (+)/(–)” keys input is as follows:
Example: 01 
 02 
 03 
 01 
 ...
The cursor movement by the “CH (
ù
)/(
Ù
)” keys input is as follows:
Example: 02 
 05 
 ... 
 F6 
 02 
 ...
LC-13E1E
LC-15E1E
13
4. Initialization
When the microprocessor (IC2001) or the EEPROM (IC2004) has been replaced or when the EEPROM has been
initialized, readjust the each adjustments.
4-1. Connect the pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power.
4-2. Select the model name to (E1E).
4-3. Select the inch size (13)
~
1
 or (15)
~
2
.
4-4. LED changes green from red after setting finish and about 15 seconds, initialization is completed, and it
becomes adjustment mode.
NOTE:
~
1: MODEL. LC-13E1E
~
2: MODEL. LC-15E1E
5. Adjustment
5-1. +B adjustment...Page 1 +B-ADJ
Adjust the voltage of the pin (13) of P2002 to 5.00 ±0.02V.
Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely.
5-2. Counter-bias adjustment
Vary the "COM BIAS" setting on Page 2 of the adjustment process mode so that the contrast be sharpest
(black looks most sinking).
5-3. TAMP adjustment
1) Receive the upper left of 75% white half colour bar signal.
2) See if the “Y” reading on page 2 of the adjusment process mode is somewhere following. If not, make the
“PAL TAMP” adjustment to get the “Y” reading in the range of BF thru C9.
3) If the adjustment of “PAL TAMP” is executed, write its adjustment value to the “SECAM TAMP” manually.
(Screen of the page 2 of the adjustment processing menu OSD)
5-4. White balance adjustment
Adjust “RCUTOFF” and “BCUTOFF” on the page 2 of the adjustment processing so as to obtain the colour
of the same level as the standard set.
Note: For the adjustment processing of “RCUTOFF” and “BCUTOFF”, adjust them in the indication value
range of ... –9, –7, ... –1, +1, ... +7, +9.
When it becomes even-numbered value, side favor noise sometimes occurs in the monochrome signal of
the specific gradation.
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
9
0
P
A
L
T
A
M
P
2
1
S
E
C
A
M
T
A
M
P
2
1
G
C
U
T
O
F
F
R
C
U
T
O
F
F
0
5
B
C
U
T
O
F
F
G
3
B
3
R
3
0
0
0
0
0
0
3
G
1
B
4
Y
0
0
0
0
B
5
T
A
M
P
H
T
A
M
P
L
 
 
 
 
 
C
9
B
F
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Y Data
(White 75%)
LC-13E1E
LC-15E1E
14
6. Factory Setting
6-1. Perform a factory setting after completing all adjustments.
6-2. A “POWER” keys is made on with pushing an “TV/VIDEO” and “MENU” keys at the same time.
6-3. “K” of the inspection process mode is displayed on the screen upper left.
6-4. CH (
ù
) and VOL (+) keys are pushed about 2 seconds at the same time.
6-5. Release keys, if “E” is displayed on the screen upper left and “COMPLETE” is displayed on the bottom of it.
6-6. After a while, a power will be in a standby mode and a setup will be finished.
Note: “First installation” serves on “Deutsch”.
7. Lamp error detection
7-1. Functional description
This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety
when the lamp or lamp circuit is abnormal.
If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed,
the followings occur.
1
The main unit of television is turned OFF 5 seconds after it is turned ON. (The power LED on the front side
of TV turns from green to red.)
2
If the situation 
1
 happens 5 times sequentially, television can not be turned ON. (The power LED remains
red.)
7-2. Countermeasures
7-2-1. Check when turning OFF the lamp error detection
When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment
process with the power LED red. Entering the adjustment process turns OFF the error detection and turns
ON TV.
This enables the operation check to detect errors in the lamp or lamp circuit.
Check whether "ERROR NO RESET" on line 9, page 1 of the adjustment process is 1 or more. If it is 1 or
more, it indicates the lamp error detection was executed.
7-2-2. Resetting of the lamp error count
After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO
RESET" on line 9, page 1 of the adjustment process and set the number to 0 using the volume button.
 1
  + B — A D J
160
M O D E L
E1E
  I N C H  
S   I Z E
~
3
N T S C
P W M
F R E Q
0C0
P A L
P W M
F R E Q
0BD
N T S C
P W M
D U T Y
0
P A L
P W M
D U T Y
0
T V
G A I
N
OFF
E R R O R
N O
R E S E T
5
P U B L I C
M O D E
OFF
E 1 E
V E R
1 . 0  0  0
Reset 0
Page 1 of the adjustment process
Afterwards, perform the operation check to confirm that the lamp error detection does not function.
NOTE:
~
3 LC-13E1E=13, LC-15E1E=15
LC-13E1E
LC-15E1E
15
TROUBLE SHOOTING TABLE
No picture, No sound
Check all the settings microprocessor’s adjust process menu.
Do F1 and F2 function?
Are T3701’s secondary 
outputs +31V, +22V, +9V, 
+5V and -8V normal?
Remove F1 and F2 and 
check the load side.
Is there short-circuiting?
Is there short-circuiting of 
T3701 primary side periphery, 
Q3700, Q3701 and S4701?
Replace F1 and F2.
Check S4701 and 
connection cable.
Is T3701’s primary oscillator 
waveform normal?
Check T3701’s secondary 
load.
Yes
Yes
No
No
No
No
Yes
Check J3702 periphery and 
connection cable.
Yes
Back light lamp failure to light up
Replace F6500 and F6501.
Is the pin (34) of IC1201 in 
the "H" state?
Is the primary side of 
T6500~T6503 periphery 
short-circuiting?
Replace the back light lamp 
with new one and check 
again.
Yes
Yes
No
No
Yes
Check the OFL1 line, IC1201 
and their peripheral parts.
Check T6500~T6503, 
Q6500~Q6505 and 
connection cable.
Page of 9
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