DOWNLOAD Sharp LC-15C2E (serv.man9) Service Manual ↓ Size: 3.8 MB | Pages: 47 in PDF or view online for FREE

Model
LC-15C2E (serv.man9)
Pages
47
Size
3.8 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
lc-15c2e-sm9.pdf
Date

Sharp LC-15C2E (serv.man9) Service Manual ▷ View online

9
LC-15C2E
ADJUSTING PROCEDURE OF EACH SECTION
[1] Entering the MAIN side adjustment process mode
There are three methods below.
1) Press the “Adjustment process key” on the remote control after turning on the power.
2) Pressing both the MENU key and the TV/VIDEO key on the main body, turn on the power. Then, press the volume
DOWN key and the tuning DOWN key at the same time.
3) Turn on the power with falling either KEY4 (pin 81 of microcomputer) or KEY5 (pin 82 of microcomputer) to “L”.
[Note] For the method 3), the ROM is initialized at the same time. Therefore, 3) must be executed if IC2004 or IC2001
is changed. For 1) or 2), the main body only enters the MAIN side adjustment process.
[2] Entering the TUNER side adjustment process mode
4) Entering the TUNER side adjustment process
MENU key on the main body 
 Cursor UP key (remote control) 
 Select the position shown in the figure below and
press the M key (remote control) within 1 second. 
 Enters the adjustment process.
[3] Adjustment
MAIN side adjustment (Press the “M” key to move the cursor and press the volume UP/DOWN key to make an
adjustment.)
• Power supply voltage adjustment (+B 5V)
• Model setting
• Inch size setting
• COMMON BIAS adjustment of LCD module
• CUTOFF adjustment
TUNER side adjustment (Press the tuning UP/DOWN key to move the cursor and press the volume UP/DOWN key to
make an adjustment.)
• Horizontal size adjustment (LCD adjustments)
• Video adjustment (other adjustments)
  Y delay
  Subcontrast
  Subcolour
  Subbrightness
  Tint offset
  AGC gain start
The TUNER side adjustment is possible. However, it is recommended to replace EAROM (I2).
Black level
Contrast
Colour
: select
M: Back
E: End
Direct control at TV
LC-15C2E
10
PAL/PAL60
SECAM
NTSC
y delay
7
6
RF
tint offset
0
0
sub contrast
2
2
sub colour
25
25
y delay
7
5
4
AV1
tint offset
1
1
1
AV2
sub contrast
0
2
0
sub colour
30
30
20
y delay
7
5
1
AVS
tint offset
1
1
1
sub contrast
0
0
0
sub colour
30
30
30
AGC gain start
23
3-1. +B adjustment
Page 9 of MAIN side adjustment process  +B-ADJ
Adjust the voltage of the pin 13 of P2002 to 5.0V
±
0.05V.
3-2. Model setting
Page 9 of MAIN side adjustment process  MODEL
Set to C2E.
3-3. Inch size setting
Page 9 of MAIN side adjustment process  INCH SIZE
Set to 15.
3-4. COMMON BIAS adjustment of LCD module
Page 9 of MAIN side adjustment process  COM BIAS
Input the picture of gray scale and adjust it so as to obtain the best contrast.
3-5. CUTOFF adjustment
Page 9 of MAIN side adjustment process  R CUTOFF, B CUTOFF
Adjust it so as to obtain the optimal colour balance.
11
LC-15C2E
[4] Lamp error detection
4-1. Functional description
This LCD color 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.)
4-2. Countermeasures
4-2-1. 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 7, page 1 of the adjustment process is 1 or more. If it is 1 or
more, it indicates the lamp error detection was executed.
4-2-2. 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 5, 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
C2E
  I N C H   I
S   I Z E
15
N T S C
P W M
F R Q
0C0
E R R O R
N O
R E S E T
5
P M U T E
OFF
C 2 E
V E R
1 .   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.
LC-15C2E
12
TROUBLE SHOOTING TABLE
No picture, No sound
Check all the settings microprocessor's adjust process menu.
Do F2, F3 and F4 
function?
Are T701's secondary 
outputs, +38V, +16V, +9V, 
+5V and -8V normal?
Remove F2, F3 and F4 
and check the load side.
Is there short-circuiting?
Is there short-circuiting of 
T701 primary side periphery, 
Q751, Q753 and P901.
Replace F2, F3 and F4.
Check P901 and 
connection cable.
Is T701's primary oscillator 
waveform normal?
Check T701's secondary 
load.
Yes
Yes
No
No
No
No
Yes
Fluorecent lamp failure to light up
Does F1 function?
Is the pin 34 of IC1201 in 
the "H" state?
Is the Q7603 short-circuiting?
Is there short-circuiting of 
T5701 and T5702 primary 
side periphery, Q751~Q753.
Yes
Yes
No
No
No
Yes
Replace the fluorecent lamp 
with new one and check 
again.
Yes
Check the OFL1 line, IC1201 
and their peripheral parts.
Check Q7603 and their 
peripheral parts.
Check T5701, T5702, 
Q5701~Q5703 and 
connection cable.
Page of 47
Display

Click on the first or last page to see other LC-15C2E (serv.man9) service manuals if exist.