sharp 14T1 L Service Manual
14T1-L
conventional analog manner. The adjustments via the I2C bus control include preset-only items and
(c) Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.
TV14T1-LService Manual14T1-LMarketE
CHAPTER 5. ADJUSTMENT METHOD
[1] ADJUSTMENT METHOD
ADJUSTMENT PRECAUTIONS
This model's setting are adjusted in two different ways: through the I2C bus control and in the
variable data.
1. Setting the service mode by the microprocessor.
(a) Press and hold the local key "VOL DOWN" & "CH UP" and power on the main switch,
TV will enter into the SERVICE MODE. Or Key in service key of 40 (HEX) will enter the
service mode. The initial value of EEPROM are automatically preset when new EEPROM
is used. However, after the 1st time it will not be able to preset unless do the precedure
in section 2 as below.
(b) Press the CH DOWN / UP key on the remote controller to select the setting items
one by one.
(d) When press the local key "VOL DOWN" & "CH UP" at the same time or press service
key 40 (HEX), it will be released from the service mode.
2. Factory Presetting.
(1) Press remote controller key of code "B7" for 4 seconds, the initial values are
automatically preset.
(2) The initial data are preset as listed in page 2 until 7.
(3) Please modify the bus setup data.
Precaution
: If haven't done this initialization, malfunction might be happen.
3. For reference, please check with memory map RH-IXC227WJZZQ (See Attachment)
5 – 1
There is three stage of Service Mode data
Setting Data (DEC)
Item
Setting Item
Setting Range
Default
IC
First stage data from V01 ~ V35
to go into second stage of service mode data, press MENU key
Second stage data from 008 ~ 1FF
Below is the contents of these data
Adjustment Mode Items
01 RF-AGC 0…63 UOC-TV 23 23
02 V-SLOPE 0…63 UOC-TV 31 31
03 S-COR 0…63 UOC-TV 16 16
04 DRI-RS 0…63 UOC-TV 32 32
05 DRI-GS 0…63 UOC-TV 32 32
06 DRI-BS 0…63 UOC-TV 32 32
07 CUT-RS 0…63 UOC-TV 16 16
08 CUT-GS 0…63 UOC-TV 16 16
09 CUT-BS 0…63 UOC-TV 16 16
10 SUB-BRI 0…63 UOC-TV 32 32
11 SUB-CON 0…63 UOC-TV 25
12 SUB-COL 0…63 UOC-TV 10 10
13 SUB-TINT 0…63 UOC-TV 36 36
14 SUB-SHARP 0…63 UOC-TV 32 32
15 DRI-RW 0…63 UOC-TV 38 38
16 DRI-GW 0…63 UOC-TV 32 32
17 DRI-BW 0…63 UOC-TV 19 19
18 DRI-RLW 0…63 UOC-TV 33 33
19 DRI-GLW 0…63 UOC-TV 32 32
20 DRI-BLW 0…63 UOC-TV 25 25
21 DRI-RC 0…63 UOC-TV 32 32
22 DRI-GC 0…63 UOC-TV 32 32
23 DRI-BC 0…63 UOC-TV 37 37
24 DRI-RLC 0…63 UOC-TV 32 32
25 DRI-GLC 0…63 UOC-TV 32 32
26 DRI-BLC 0…63 UOC-TV 34 34
27 V-SHI-60 0…63 UOC-TV 32 32
28 V-AMP-60 0…63 UOC-TV 32 32
29 H-SHI-60 0…63 UOC-TV 45 45
30 VSD 0/1 UOC-TV 0 0
31 CUT OFF 0…63 UOC-TV 27 27
32 DCXO 0…4 UOC-TV 2 1
33 ISP MODE 0/1 UOC-TV 0 0
34 BLOC 0…15 UOC-TV 6 6
35 SUB-VOL 0…60 UOC-TV 60 60
14T1-L
45 (BUS SETUP)
5 – 2
14T1-L
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL
PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
MAX - 0.1V dc
SYMBOL
RF INPUT
FIELD STRENGTH
56dBµV
(FIX)
TUNER AGC TERMINAL (JA352) OR CRT DISPLAY CONFIRMATION
(AT SELF ADJUSTMENT MODE)
1.GO TO SERVICE MODE
2.GO TO SERVICE DATA "RF-AGC" ITEM IN THE ADJUSTMENT, PRESS R/C TO OPERATE AUTOAGC KEY AND CONFIRM THE OK DISPLAY ON THE SCREEN .
3.BLUE DISPLAY WITH OK SIGN INDICATES THE ADJUSTMENT IS WORKING PROPERLY.
(AT MANUAL ADJUSTMENT MODE)
[CHECKING CONFIRMATION ]
14T1-L
I2C CONTROL
BUS SET UP
US10CH HALF COLOR BAR
RF-AGC
01
STEP RANGE
0-63
HISTORY
OF REVISION
REVISED CONTENT .
MODEL NAME
1. SELECT "RF-AGC" ITEM IN THE ADJUSTMENT MODE. ADJUST THE "RF-AGC" BUS
DATA TO OBTAIN THE TUNER OUTPUT PIN DROP 0.1V~1.0V BELOW MAXIMUM
VOLTAGE.
2. CHANGE THE ANTENNA INPUT SIGNAL TO 63~67 dBuV, AND MAKE SURE THERE IS NO
NOISE
3. CHANGE THE ANTENNA INPUT SIGNAL TO 90~95 dBuV TO BE SURE THAT THERE IS NO
CROSS MODULATION BEAT.
5 – 3
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL
PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
AC 220 V, RF INPUT, ZERO MAGNETIC FIELD
CRT DISPLAY CONFIRMATION
ADJUST THE V-SLOPE BUS DATA UNTILL THE OVERSCAN BECOME AS SPECIFIED BELOW.
CAUTION:- PLEASE AGING TV MORE THAN 10 MINUTES BEFORE ADJUSTMENT.
[CHECKING CONFIRMATION ]
14T1-L
I2CCONTROL
BUS SET UP,CRT PURITY
US 4 CH LION HEAD
V-SLOPE
02
STEP RANGE
0~63
HISTORY
OF REVISION
REVISED CONTENT .
MODEL NAME
A = Outofspec
B=OK
C = Out of spec
OUTPUT
14T1-L
ADJUSTMENT
PROCEDURE
SYMBOL
5 – 4
14T1-L
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTOROL
PRE-ADJUST
REQUIREMENT
INPUT
CONDITION
AC 220 V, RF INPUT, ZERO MAGNETIC FIELD
CRT DISPLAY CONFIRMATION
ADJUST V-SHIFT BUS DATA TO HAVE A MOST ACCEPTABLE VERTICAL POSITION.
THE MONOSCOPE PATTERN SHOULD BE BALANCE IN VERTICAL POSITION
[CHECKING CONFIRMATION ]
14T1-L
I2C CONTROL
BUS SET UP, CRT PURITY, V-SLOPE
US4CHLIONHEAD(MONOSCOPEPATTERN)
V-SHIFT-60
27
STEP RANGE
0-63
HISTORY
OFREVISION
REVISED CONTENT .
MODEL NAME
CONTENT
OUTPUT
ADJUSTMENT
PROCEDURE
SYMBOL
5 – 5
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