sharp 14T1 L Service Manual

14T1-L

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 conventional analog manner. The adjustments via the I2C bus control include preset-only items and 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.

(c)Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.

(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)

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14T1-L

There is three stage of Service Mode data 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

Item	Setting Item	Setting Range	IC	Default	Setting Data (DEC)
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	45 (BUS SETUP)
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

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14T1-L

	MODEL NAME				14T1-L
	ADJUSTMENT				RF-AGC
	ITEM
	ADJUSTMENT	01			STEP RANGE		0-63
	POSITION
	CONTROL	I2C CONTROL
	PRE-ADJUST	BUS SET UP
	REQUIREMENT
	CONTENT	US10CH HALF COLOR BAR
	INPUT	RF INPUT
	CONDITION	FIELD STRENGTH 56dBµV(FIX)
	OUTPUT	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 AUTO-
		AGC 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)
	ADJUSTMENT	1. SELECT "RF-AGC" ITEM IN THE ADJUSTMENT MODE. ADJUST THE "RF-AGC" BUS
	PROCEDURE
		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.
		[CHECKING CONFIRMATION ]
		MAX - 0.1V dc
	HISTORY		SYMBOL	REVISED CONTENT .
	OF REVISION

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14T1-L

	MODEL NAME		14T1-L
	ADJUSTMENT		V-SLOPE
	ITEM
	ADJUSTMENT	02	STEP RANGE	0~63
	POSITION
	CONTROL	I2C CONTROL
	PRE-ADJUST	BUS SET UP,CRT PURITY
	REQUIREMENT
	CONTENT	US 4 CH LION HEAD
	INPUT	AC 220 V, RF INPUT, ZERO MAGNETIC FIELD
	CONDITION
	OUTPUT	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.

ADJUSTMENT

PROCEDURE

[CHECKING CONFIRMATION ]

A= Out of spec

B= OK

C= Out of spec

HISTORY

SYMBOL REVISED CONTENT .

OF REVISION

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14T1-L

	MODEL NAME		14T1-L
	ADJUSTMENT		V-SHIFT-60
	ITEM
	ADJUSTMENT	27	STEP RANGE	0-63
	POSITION
	CONTOROL	I2C CONTROL
	PRE-ADJUST	BUS SET UP, CRT PURITY, V-SLOPE
	REQUIREMENT
	CONTENT	US 4 CH LION HEAD (MONOSCOPE PATTERN)
	INPUT	AC 220 V, RF INPUT, ZERO MAGNETIC FIELD
	CONDITION
	OUTPUT	CRT DISPLAY CONFIRMATION

ADJUST V-SHIFT BUS DATA TO HAVE A MOST ACCEPTABLE VERTICAL POSITION.

THE MONOSCOPE PATTERN SHOULD BE BALANCE IN VERTICAL POSITION

ADJUSTMENT

PROCEDURE

[CHECKING CONFIRMATION ]

HISTORY

SYMBOL REVISED CONTENT .

OFREVISION

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