Sharp 14V-L70M User manual

SERVICE MANUAL
TVSM017-14V-L70M
NTSC SYSTEM
COLOR TELEVISION
GA-1- CHASSIS
MODEL :
14V-L70M
In the interests of user-safety (Required by safety regulations in some countries) the set should be
restored to its original condition and only parts identical to those specified should be used.
CONTENTS
•ELECTRICAL SPECIFICATIONS ------------------------------------------------------------------- 1
•IMPORTANT SERVICE SAFETY PRECAUTION ----------------------------------------------- 2
•LOCATION OF USER’S CONTROL --------------------------------------------------------------- 4
•INSTALLATION AND SERVICE INSTRUCTIONS ----------------------------------------------- 5
•CHASSIS LAYOUT ------------------------------------------------------------------------------------- 13
•BLOCK DIAGRAM -------------------------------------------------------------------------------------- 14
•SCHEMATIC DIAGRAMS ----------------------------------------------------------------------------- 18
•PRINTED WIRING BOARD ASSEMBLIES ------------------------------------------------------- 21
•REPLACEMENT PARTS LIST ----------------------------------------------------------------------- 24
•PACKING OF THE SET -------------------------------------------------------------------------------- 31
ELECTRICAL SPECIFICATIONS
POWER INPUT ….…....… 110~230 V AC 60Hz
POWER RATING ………………………….. 55W
PICTURE SIZE …….…… 574 cm 2 (89 sq inch)
CONVERGENCE …………………….. Magnetic
SWEEP DEFLECTION ………………. Magnetic
FOCUS ……………………… QPF Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency …. 45.75 MHz
Sound IF Carrier Frequency .…. 41.25 MHz
Color Sub-Carrier Frequency … 42.17 MHz
(Nominal)
AUDIO POWER OUTPUT RATING …….... 3 W
SPEAKER SIZE ………………….……. 9 x 5 cm
VOICE COIL IMPEDANCE .. 16 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ……………. 75 ohm Unbalanced
TUNING RANGES
VHF-Channels ………….………… 2 thru 13
UHF-Channels ………..………… 14 thru 69
CATV Channels ……..………….. 1 thru 125
Specifications are subject to change
without prior notice.
SHARP (PHILS.) CORPORATION
Km 23 West Service Road, South Super Highway Alabang, City of Muntinlupa

2
14V-L70M
IMPORTANT SERVICE SAFETY PRECAUTION
Service work should be performed only by qualified service technicians who are thoroughly familiar
with all safety checks and the servicing guidelines which follow:
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
3. Semiconductor heat sinks are potential shock
hazards when the chassis is operating.
4. The chassis in this receiver has two ground systems
which are separated by insulating material. The non-
isolated (hot) ground system is for the B+ voltage
regulator circuit and the horizontal output circuit. The
isolated ground system is for the low B+ DC
voltages and the secondary circuit of the high
voltage transformer.
To prevent electrical shock, use an isolation
transformer between the line cord and power
receptacle, when servicing this chassis.
SERVICING OF HIGH VOLTAGE SYSTEM AND
PICTURE TUBE
When servicing the high voltage system, remove the
static charge by connecting a 10k ohm resistor in
series with an insulated wire (such as a test probe)
between the picture tube ground and the anode lead.
(AC line cord should be disconnected from AC
outlet.)
1. Picture tube in this receiver employs integral
implosion protection.
2. Replace with tube of the same type number for
continued safety.
3. Do not lift picture tube by the neck.
4. Handle the picture tube only when wearing
shatterproof goggles and after discharging the high
voltage anode completely.
X-RADIATION AND HIGH VOLTAGE LIMITS
1. Be sure all service personnel are aware of the
procedures and instructions covering X-radiation.
The only potential source of X-ray in current solid
state TV receivers is the picture tube. However, the
picture tube does not emit measurable X-Ray
radiation, if the high voltage is as specified in the
“High Voltage Check” instructions.
It is only when high voltage is excessive that X-
radiation is capable of penetrating the shell of the
picture tube including the lead in the glass material.
The important precaution is to keep the high voltage
below the maximum level specified.
2. It is essential that servicemen have available at all
times an accurate high voltage meter.
The calibration of this meter should be checked
periodically.
3. High voltage should always be kept at the rated
value –no higher. Operation at higher voltages may
cause a failure of the picture tube or high voltage
circuitry and; also, under certain conditions, may
produce radiation in exceeding of desirable levels.
4. When the high voltage regulator is operating
properly there is no possibility of an X-radiation
problem. Every time a color chassis is serviced, the
brightness should be tested while monitoring the
high voltage with a meter to be certain that the high
voltage does not exceed the specified value and that
it is regulating correctly.
5. Do no use a picture tube other than that specified or
make unrecommended circuit modifications to the
high voltage circuitry.
6. When trouble shooting and taking test
measurements on a receiver with excessive high
voltage, avoid being unnecessarily close to the
receiver.
Do not operate the receiver longer than is necessary
to locate the cause of excessive voltage.

3
14V-L70M
IMPORTANT SERVICE SAFETY PRECAUTION
(Continued)
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform the
following safety checks.
1. Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacity networks, mechanical
insulators and etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
!Plug the AC cord directly into a 110~230 volt AC
outlet, (Do not use an isolation transformer for this
test).
!Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series with
all exposed metal cabinet parts and a known earth
ground, such as electrical conduit or electrical ground
connected to earth ground.
!Use an AC voltmeter having with 5000 ohm per volt,
or higher, sensitivity to measure the AC voltage drop
across the resistor.
!Connect the resistor connection to all exposed metal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon and etc.) and measure the AC voltage
drop across the resistor.
All checks must be repeated with the AC line cord
plug connection reversed. (If necessary, a non-
polarized adapter plug must be used only for the
purpose of completing these check.)
Any current measured must not exceed 0.5 milliamp.
Any measurements not within the limits outlined
above indicate of a potential shock hazard and
corrective action must be taken before returning the
instrument to the customer.
SAFETY NOTICE
Many electrical and mechanical parts in television
receivers have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by “ ! “
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams.
For continued protection, replacement parts must be
identical to those used in the original circuit. The use of
substitute replacement parts which do not have the same
safety characteristics as the factory recommended
replacement parts shown in this service manual, may
create shock, fire, X-radiation or other hazards.

4
14V-L70M
LOCATION OF USER'S CONTROL
TV
Infrared TransmitterWindow
INPUT
Press Switch to external video input
mode.
Pres s again Switch to TV mode.
Press Switch to external video
INPUT 1mode.
Pres s 2 times Switch to external
video INPUT 2mode.
Press 3 times Switch back to the
originalTV mode.
CHANNEL UP/DOWN
() Selects next higher channel.
(


) Selects next lower channel.
Moves the " "
mark of the MENU
screen.
MENU
Press Accesses MAIN MENU.
Press again ExitsMAIN MENU.
DISPLAY
Press Displays receiving channel for
4 seconds.
Press againRemoves display.
Temporarily displays receiving
channel when in Closed Caption
mode.
Front Panel
Basic Remote Control Functions
POWER
Press

> On.
Press again

> Off
REMOTE KEYPAD
Accesses an y channel fromkeypad.
FLASHBACK
Returns to previous channel.
VOLUME UP/DOWN
(+) Increases sound.
(-) Decreases sound.
In menu mode, changes or selects
the TVadjustments.
MUTE
Press Mutes sound.
Press again Restores sound.
CLOSED CAPTION appears when
sound is muted.
>
>
>
>
>
>
>
>
CHANNELUp/Down
(PowerOn)
VOLUMEUp/Down
Menu
POWER
Standbyindicator
MAINPower
REMOTE
CONTROLSensor
FRONT

5
14V-L70M
INSTALLATION AND SERVICE INSTRUCTIONS
Note: (1) When performing any adjustments to resistor controls and transformers use non-metallic
screwdrivers or TV alignment tools.
(2) Before performing adjustments, the TV set must be on at least 15 minutes.
CIRCUIT PROTECTION
The receiver is protected by a 3.15A fuse (F701),
mounted on PWB-A, wired into one side of the AC line
input.
+B DC REGULATOR CONFIRMATION
The +B DC output voltage adjustment is not included
in this circuit. However, should confirmation be
required proceed as follows.
1. Actuate receiver with 230V AC input voltage.
2. Receive a local channel.
3. Connect positive lead of digital voltmeter to C754
positive side on PWB-A; negative lead to chassis
ground.
4. Confirm this voltage reading is as below.
CAUTION: The reading should be within +130.0 ±3.0V
DC to ensure normal function and circuitry
reliability.
X-RADIATION PROTECTOR CIRCUIT TEST
After service has been performed on the horizontal
deflection system, high voltage system, B+ system,
test the X-Radiation protection circuit to ascertain
proper operation as follows:
1. Apply 230V AC using a variac transformer for
accurate input voltage.
2. Allow for warm up and adjust all customer controls for
normal picture and sound.
3. Receive a good local channel.
4. Connect a digital voltmeter to TP653 and make sure
that the voltmeter reads 21.1 ±1.5V.
5. Apply external 27.9V DC at TP653 by using an
external DC supply, TV must be shut off.
6. To reset the protector, unplug the AC cord and make
a short circuit between TP651 and TP652. Now make
sure that normal picture appears on the screen.
7. If the operation of the horizontal oscillator does not
stop in step 5, the circuit must be repaired before the
set is returned to the customer.
HIGH VOLTAGE CHECK
High voltage is not adjustable but must be checked to
verify that the receiver is operating within safe and
efficient design limitations as specified checks should
be as follows:
1. Connect an accurate high voltage meter between
ground and anode of picture tube.
2. Operate receiver for at least 15 minutes at 110~230V
AC line voltage, with a strong air signal or a properly
tuned in test signal.
3. Receive a good local channel.
4. The voltage should be approximately, 23.5kV (at
picture MAX bright center condition).
If a correct reading cannot be obtained, check
circuitry for malfunctioning components.

6
14V-L70M
For adjustments of this model, the bus data is converted to various analog signals by the D/A converter circuit.
Note: There are still a few analog adjustments in this series such as focus and master screen voltage. Follow the
steps below whenever the service adjustment is required. See “Table-B” to determine, if service adjustments
are required.
1. Service mode
Before putting unit into the service mode, check that
customer adjustments are in the normal mode. Use
the reset function in the video adjustment menu to
ensure customer controls are in their proper (reset)
position.
2. Service item selection
Once in the service mode, press the Ch-up or Ch-
down button on the remote controller or at the set.
The service adjustment item will vary in increments of
one. Select the item you wish to adjust.
3. Data number selection
Press the Vol-up or down button to adjust the data
number.
To enter the service mode and exit service mode.
Short JA137 & JA138 for 1 Second and release to switch
to the service mode position, and the microprocessor is in
input mode. (Adjustment through the I2C bus control.) To
exit the service mode, turn the television off by pressing
the power button.

SERVICE MODE
(1) In the Service Mode, Key is used to select the mode in the following order.
VERTICAL AMP (V-AMP)
VERTICAL SHIFT (V-CENT)
VERTICAL ZOOM (V-ZOOM)
HORIZONTAL SHIFT (H-CENT)
EAST-WEST WIDTH (H-SIZE)
HORIZONTAL PARALLELOGRAM (EW//)
EAST-WEST PARABOLA/WIDTH (PARA)
EAST-WEST UPPER CORNER
PARABOLA (COR(U))
EAST-WEST TRAPEZIUM (TRAPE)
HORIZONTAL BOW (HB)
EAST-WEST LOWER CORNER
PARABOLA (COR(L))
14V-L70M
SUB BRIGHTNESS (SUB-BRI)
S-CORRECTION (S-COR)
SUB TINT (SUB-TINT)
SUB COLOR (SUB-COL)
MAX VOLUME (SUB-VOL)
SUB CONTRAST (SUB-CON)
BLUE BACK CONTRAST (BB-CON)
CATHODE DRIVE LEVEL (CDL)
BLACK LEVEL OFFSET G (CUT-G)
MAX HOTEL VOLUME (HTL-VOL)
HOTEL PROGRAM NO (HTL-PRG)
W.P. BLUE OFFSET HIGH /
OSD GRB REFERENCE (RGB)
BLACK LEVEL OFFSET R (CUT-R)
SUB SHARPNESS (SUB-SHP)
W.P. BLUE MH / STD (DRI-B-MH)
OFFSET BLUE TONE (DRI-B-HI)
W.P. RED MH / STD (DRI-R-MH)
W.P. GREEN OFFSET LOW (DRI-G-LO)
OFFSET RED TONE (DRI-G-ML)
W.P. BLUE OFFSET ML /
OFFSET RED TONE (DRI-B-ML)
W.P. RED OFFSET LOW (DRI-R-LO)
W.P. RED OFFSET ML /
OFFSET RED TONE (DRI-R-ML)
W.P. GREEN OFFSET ML /
W.P. GREEN MH / STD (DRI-G-MH)
OFFSET BLUE TONE (DRI-R-HI)
W.P. GREEN OFFSET HIGH /
OFFSET BLUE TONE (DRI-G-HI)
AGC TAKE OVER POINT (AGC)
VERTICAL SLOPE (V-LIN)
W.P. BLUE OFFSET LOW (DRI-B-LO)
W.P. RED OFFSET HIGH /
AGC &
GEOMETRIC
MODE
AGC &
GEOMETRIC
MODE
WHITE POINT
ADJ.
MODE
SUB
ADJ.
MODE
WHITE POINT
ADJ.
MODE
SUB
ADJ.
MODE
FEATURE
OPTION
MODE
IC
OPTION
MODE
MTS
ADJ.
MODE
OFFSET
ADJ.
MODE
7

14V-L70M
1Press the CH DOWN/UP key on the remote controller to get ready to select the mode one by one.
2Press the CH DOWN/UP key on the remote controller to select the modes reversibly one by one.
3Using the VOLUME UP/DOWN key on the remote controller, the data can be modified.
(OSD distubance can be erased by R/C display key)
PHI 1 TIME CONSTANT FOR FE (FOA-FE)
PHI 1 TIME CONSTANT FOR FE (FOB-FE)
AUTO SWITCH OFF ENABLED (AUTO-OFF)
FORCED SLICING LEVEL FOR VERTICAL SYNC. (FSL)
IF AGC SPEED BIT 0 (AGC0)
IF AGC SPEED BIT 1 (AGC1)
SOUND MUTE BIT 0 (SM0)
SOUND MUTE BIT 1 (SM1)
CHARGE PUMP (CP)
FM WINDOW SELECTION (FMWS)
HOTEL MODE (HTL)
GAIN FM DEMODULATOR (BTSC)
AUTO COLOR LIMIT (ACL)
FORCED COLOR-ON (FCO)
AUTOMATIC VOLUME LEVELLING (AVL)
V-CHIP (V-CHIP)
INITIAL/DEFAULT LANGUAGE (INIT)
FAO-MAX VOLUME (FA0-VOL)
VERTICAL SCAN DISABLE (VSD)
BLACK STRETCH (BKS)
ENERGY SAVE OFFSET (ESV_OFFS)
CLOSE CAPTION POSITION (CCPOS)
Y-D TIME (TV) [YD] (DL-TV)
Y-D TIME (AV) [YD] (DL-AV)
BASS LEVEL (BASS)
STEREO SEPARATION ADJUSTMENT (3kHZ) (SPECTRAL)
ATTENUATE INPUT SIGNAL LEVEL (ATT)
VCO FREE RUNNING FREQUENCY ADJ. (VCO)
REAL TIME CLOCK / ON TIMER (CLOCK)
TREBLE LEVEL (TREBLE)
DEMO MODE (DEMO)
UNIVERSAL PLUS (UNIV+)
SPEAKER ON/OFF (SPEAKER)
FRENCH LANGUAGE (FRENCH)
EZ SETUP / AUTOPRESET (EZ-SETUP)
WHITE TEMP OR FAVORITE COLOR (W-TEMP)
AV ENABLED OR DISABLED (AV)
RATIO PRE- AND OVERSHOOT BIT 0 (RPO0)
STEREO, SAP, DBX FILTER ADJ. (FILTER)
STEREO SEPARATION ADJUSTMENT (300HZ) (WIDEBAND)
MTS DECODING ENABLED (MTS)
ENERGY SAVE (E-SAVE)
PERSONAL PREFERENCE PROGRAM (P_PREF)
FIXED AUDIO OUT (FAO)
VIEW TIMER (VIEW-TM)
AV2 ENABLED OR DISABLED (AV2)
DYNAMIC SKIN CONTROL (DSK)
RATIO PRE- AND OVERSHOOT BIT 1 (RPO1)
GAIN FM DEMODULATOR (AGN)
FAST FILTER IF-PLL (FFI)
ENABLE VERTICAL GUARD (EVG)
EHT TRACKING MODE (EHT)
OVERSCAN SWITCH OFF (OSO)
VIDEO MUTE AT IDENT LOSS (VMI)
VIDEO MUTE AT PROGRAM/SOURCE CHANGE (VMC)
Figure B: ADJUSTMENT CATEGORIES
PHI 1 TIME CONSTANT FOR AV (FOA-AV)
PHI 1 TIME CONSTANT FOR AV (FOB-AV)
AGC &
GEOMETRIC
MODE
MTS
ADJ.
MODE
IC
OPTION
MODE
FEATURE
OPTION
MODE
FORWARD: CH DOWN KEY
REVERSE: CH UP KEY
( ) means OSD display.
8

Table - A
SERVICE MODE
0 (English), 1 (Spanish),
2 (French)
0~63
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
0
0
0
1
0
1
1
0
1
1
0
8
0
1
1
28
32
27
8
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (fast tuning) or 1
(moderate speed tuning)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
HOTEL MODE
GAIN FM DEMODULATOR
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
AUTO COLOR LIMIT
FORCED COLOR-ON
TREBLE LEVEL
VERTICAL SCAN DISABLE
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0A'15
0 or 1 when item selected
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0~63
0~63
0A'15
"STEREO, SAP, DBX FILTER ADJ."
STEREO SEPARATION ADJUSTMENT (300HZ)
STEREO SEPARATION ADJUSTMENT (3KHZ)
BASS LEVEL
CHARGE PUMP
VIDEO MUTE AT IDENT LOSS
VIDEO MUTE AT PROGRAM / SOURCE CHANGE
EHT TRACKING MODE
OVERSCAN SWITCH OFF
BLACK STRETCH
AUTOMATIC VOLUME LEVELLING
FAST FILTER IF-PLL
ENABLE VERTICAL GUARD
HTL
BTSC
CP
ACL
FCO
VMI
VMC
FFI
EVG
EHT
OSO
TREBLE
VSD
BKS
AVL
FILTER
WIDEBAND
SPECTRAL
BASS
must be "20"
must be "8"
must be "0"
must be "2"
must be "2"
must be "5"
must be "24"
must be "22"
must be "19"
must be "63"
must be "52"
must be "32"
must be "32"
must be "25"
must be "32"
must be "37"
must be "32"
must be "17"
must be "32"
must be "33"
FIX
ADJ
FIX
FIX
FIX
FIX
FIX
ADJ
ADJ
FIX
FIX
FIX
FIX
FIX
FIX
ADJ
ADJ
ADJ
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
ADJ
ADJ
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
ADJ
FIX
FIX
ADJ
ADJ
ADJ
ADJ
10
32
10
32
12
0
63
32
32
0
12
32
255
10
15
32
32
32
32
32
32
63
63
32
32
32
32
32
25
32
32
32
0
32
32
32
32
32
32
32
32
32
32
14
32
32
32
0~63
0~255
0~15
0~63
0`15
0~63
Y-D TIME (AV) [YD]
INITIAL / DEFAULT LANGUAGE
0~63
0~63
0~15
0~15
0~63
0~125 or >125 for none
0~15
0~15
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
0~63
HORIZONTAL BOW
S-CORRECTION
0~63
0~63
0~63
0~63
EAST-WEST PARABOLA / WIDTH
EAST-WEST UPPER CORNER PARABOLA
AGC TAKE OVER POINT
VERTICAL SLOPE
0~63
0~63
0~63
0~63
0~63
0~63
VCO FREE RUNNING FREQUENCY ADJ.
FAO-MAX VOLUME
VERTICAL ZOOM
HORIZONTAL SHIFT
W.P. RED OFFSET ML / OFFSET RED TONE
W.P. GREEN OFFSET ML / OFFSET RED TONE
W.P. BLUE OFFSET HIGH / OFFSET BLUE TONE
W.P. RED MH /STD
SUB COLOR
Y-D TIME (TV) [YD]
BLUE BACK CONTRAST
OSD GRB REFERENCE
ATTENUATE INPUT SIGNAL LEVEL
BLACK LEVEL OFFSET R
BLACK LEVEL OFFSET G
ENERGY SAVE OFFSET
CLOSE CAPTION POSITION
SUB SHARPNESS
MAX VOLUME
SUB CONTRAST
CATHODE DRIVE LEVEL
SUB BRIGHTNESS
MAX HOTEL VOLUME
HOTEL PROGRAM NO
W.P. RED OFFSET LOW
W.P. GREEN MH / STD
W.P. BLUE MH / STD
SUB TINT
W.P. GREEN OFFSET LOW
W.P. BLUE OFFSET LOW
CCPOS
ATT
VCO
EAST-WEST WIDTH
HORIZONTAL PARALLELOGRAM
W.P. RED OFFSET HIGH / OFFSET BLUE TONE
W.P. GREEN OFFSET HIGH / OFFSET BLUE TONE
EAST-WEST LOWER CORNER PARABOLA
EAST-WEST TRAPEZIUM
W.P. BLUE OFFSET ML / OFFSET RED TONE
INIT
FAO-VOL
ESV_OFFS
CUT-G
CDL
DL-TV
DL-AV
HTL-PRG
BB-CON
RGB
CUT-R
SUB-BRI
SUB-TINT
SUB-SHP
HTL-VOL
DRI-B-LO
SUB-VOL
SUB-CON
SUB-COL
DRI-G-ML
DRI-B-ML
DRI-R-LO
DRI-G-LO
DRI-R-MH
DRI-G-MH
DRI-B-MH
DRI-R-ML
S-COR
DRI-R-HI
DRI-G-HI
DRI-B-HI
COR(U)
COR(L)
TRAPE
HB
H-CENT
H-SIZE
EW//
PARA
ADJUST ITEM REMARK
FIX/ADJ
INITIAL VALUE
RANGE
DATA
VERTICAL AMP
POSITION
AGC
V-LIN
V-AMP
V-CENT
V-ZOOM
VERTICAL SHIFT
14V-L70M
SERVICE
9

14V-L70M
Holding down to short JA137 & JA138 and turn on the main power SW will automatically write the initial values into
IC1003.
This can be done only when a new EEPROM is used. (Judge with the first 4 bytes.)
IC801 Data is stored in IC1003
Holding down to short JA137 & JA138 and turn on the
main power SW will automatically write the initial values
into IC1003. This can be done only when a new
EEPROM is used. (Judge with the first 4 bytes.)
CRT Adjust items related to picture tube only.
0
FIX
SM0
SOUND MUTE BIT 0 (SM0)
1
FIX
FMWS
FM WINDOW SELECTION
0 (disable) or 1 (enable)
FIX
AGC0
IF AGC SPEED BIT 0
1
FIX
SM1
SOUND MUTE BIT 1
0
FIX
FOA-FE
PHI 1 TIME CONSTANT FOR FE
0
FIX
AGC1
IF AGC SPEED BIT 1
0
FOA-AV
PHI 1 TIME CONSTANT FOR AV
1
FIX
FOB-FE
PHI 1 TIME CONSTANT FOR FE
0
FOB-AV
PHI 1 TIME CONSTANT FOR AV
1
FIX
FIX
HP2
SYNCHRONIZATION OF OSD/TEXT DISPLAY
0 (disable) or 1 (enable)
0
FSL
FORCED SLICING LEVEL FOR VERTICAL SYNC.
0 (disable) or 1 (enable)
0
FIX
FIX
FIX
RGBL
RGB BLANK
0 (disable) or 1 (enable)
0
V-CHIP
V-CHIP
0 (disable) or 1 (enable)
0
FIX
MTS
MTS DECODING ENABLED
0 (disable) or 1 (enable)
0
FIX
FIX
FIX
DEMO
DEMO MODE
CLOCK
REAL TIME CLOCK / ON TIMER
0 (disable) or 1 (enable)
0
0 (disable) or 1 (enable)
1
E-SAVE
ENERGY SAVE
0 (disable) or 1 (enable)
1
FIX
P_PREF
PERSONAL PREFERENCE PROGRAM
0 (disable) or 1 (enable)
0
FIX
FIX
FIX
UNIV+
UNIVERSAL PLUS
SPEAKER
SPEAKER ON/OFF
0 (disable) or 1 (enable)
0
0 (disable) or 1 (enable)
0
FAO
FIXED AUDIO OUT
0 (disable) or 1 (enable)
0
FIX
VIEW-TM
VIEW TIMER
0 (disable) or 1 (enable)
1
FIX
FIX
must be "1"
FIX
FRENCH
FRENCH LANGUAGE
EZ-SETUP
EZ SETUP / AUTOPRESET
0 (AUTOPRESET) or
1
0 (disable) or 1 (enable)
1
1 (EZ SETUP)
FIX
W-TEMP
WHITE TEMP OR FAVORITE COLOR
0 (FC) or 1 (WT)
0
FIX
AV
AV ENABLED OR DISABLED
1 (with external source)
0 (without ext. source) or
1
AV2
AV2 ENABLED OR DISABLED
0 (1 input) or 1 (2 input)
0
SERVICE
ADJUST ITEM
DATA
REMARK
POSITION
RANGE
INITIAL VALUE
FIX/ADJ
FIX
FIX
0
RATIO PRE- AND OVERSHOOT BIT 0
0 (disable) or 1 (enable)
0
DYNAMIC SKIN CONTROL
0 (disable) or 1 (enable)
FIX
DSK
0 (disable) or 1 (enable)
RPO1
RATIO PRE- AND OVERSHOOT BIT 1
0
FIX
RPO0
FIX
AGN
GAIN FM DEMODULATOR
0 (normal) or 1 (+6dB)
0
FIX
FIX
AUTO-OFF
AUTO SWITCH OFF ENABLED
PON-CH
0 (disable) or 1 (enable)
1
0 (disable) or 1 (enable)
1
Table - A
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
0 (disable) or 1 (enable)
X
PART REPLACED NOTES
Table - B
IC1003 X
X
NECESSARY UNNECESSARY
ADJUSTMENT
10

SERVICE ADJUSTMENT
RF AGC Adjustment
1. Receive a good local channel.
2. Enter the service mode signal category and select
the service adjustment "AGC".
3. Set the data value to point where no noise or beat
appears.
4. Select another channel to confirm that no noise or
beat appears.
SUB-TINT (I
2
C1. Receive the "Color Bar" signal through AV in. WAVEFORM 1
BUS CONTROL) 2. Connect the oscilloscope to TP47B (Pin (5) of SAME LEVEL
P882) BLUE-OUT.
Range : 10 V/div. (AC) (Use probe 10:1)
Sweep time : 10
µ
sec/div.
3. Call the "SUB-TINT" mode in service mode. Adjust
the "SUB-TINT" bus data to obtain the waveform W Y CY G MG R B
shown as Fig 1.
4. "SUB-TINT" bus data decrease 4 steps to get final Fig 1 Fig 2
waveform. (Fig 2.)
5. Clear the SERVICE mode.
V-SLOPE (I
2
C1. Receive the Monoscope Pattern Signal.
BUS CONTROL) 2. Call the "V-LIN" mode.
3. Increase or decrease "V-LIN" by Volume key till
the horizontal line in the center of monoscope is
just at the position where the blanking starts.
V-CENTER (I
2
C1. Call the "V-CENT" mode.
BUS CONTROL) 2. Increase or decrease "V-CENT by Volume key till
the picture is centered.
V-AMP (I
2
C1. Call the "V-AMP" mode.
BUS CONTROL) 2. Increase or decrease "V-AMP" by Volume key to
set overscan to 10.0% typical.
Adjustment Spec 10.0% range 1%
S-CORRECTION
(I
2
C BUS CON-
TROL)
H-CENTER 1. Call the "H-CENT" mode.
2. Increase or decrease "H-CENT" by Volume key
to center the picture horizontal.
Focus 1. Receive the "Monoscope Pattern" signal.
Adjustment 2. Press the R/C to set Picture NORMAL condition.
3. Adjust the focus control to get the best focus.
HORIZONTAL AND VERTICAL DEFLECTION LOOP ADJUSTMENT
No.
Adjusting point
Adjusting procedure/conditions
Waveform and others
1
14V-L70M
CHROMA ADJUSTMENT
No.
Waveform and others
Adjusting procedure/conditions
Adjusting point
1
2
3
4
5
6
FIXED DATA, NO NEED TO ADJUST.
±
11

14V-L70M
CRT CUTOFF 1. Switch TV to VIDEO mode, BLUE BACK OFF, with
ADJUSTMENT NO VIDEO signal.
(I2C BUS 2. Press R/C to set Picture Normal condition.
CONTROL) 3. Connect the oscilloscope to Red OUT from IC801.
(TP47R)
Range : 1 V/Div (DC)
Sweep : 5 msec/Div
4. Adjust SCREEN VR, so that the tip of signal reach
3.0 Vdc + 0.1 Vdc.
SUB-BRIGHT- 1. Call "SUB-BRI" in service mode. (Receive Cross-
NESS hatch pattern with 5 black level windows)
ADJUSTMENT 2. Adjust the "SUB BRIGHT" bus data in order that
(I2C BUS the line 1, 2 and 3 have the same darkness
CONTROL) wherelse line 4 is slightly brighter than line 1, 2 12345
and 3 and finally line 5 will be the brighter than
line 4. 1, 2, 3 are in same black level.
WHITE BAL- 1. Receive the "Monoscope Pattern" signal. # 15,000
o
KX: 0.262
ANCE SERVICE 2. Press R/C to set Picture NORMAL condition. Y: 0.272
MODE ADJ. 3. Connect the DC milliammeter between the TP602
(I2C BUS (-) TP603 (+). (MINOLTA COLOR ANALYZER
CONTROL) 4. Check Beam current should be around (990
µ
A) CA-100)
5. Set it to service mode and adjust the DRI-G-MH, *NOTE: Above DATA can be UP/
& DRI-B-MH data to have a color temperature DOWN by volume key.
of 15,000
o
K (white).
6. Receive "WHITE" pattern, WITH BURST signal, LOW HIGH
and set BRIGHTNESS Y by generator, to ** 10
cd/m
2
(MINOLTA CA-100) by reducing LUMINATE
Y signal. *15,000
o
K
7. Adjust "CUT-R" & "CUT-G" to get 15,000
o
K. Then DRI-GW="DRI-GS"DATA-5
go back NORMAL mode (HIGH BRIGHT**) to DRI-BW=:DRI-BS"DATA-5
check color temperature. If out of range, back
to (1).
Note: This adjustment must be done after
warming up the unit for 30 minutes or
longer with a beam current over 500mA.
DRI-R-MH=32 (FIXED)
DRI-G-MH=33 (FIXED)
DRI-B-MH=37 (FIXED)
DRI-R-MH=32 (FIXED)
Maximum 1. Receive the "Monoscope Pattern" signal.
beam check 2. Press R/C to set Picture NORMAL condition.
3. Connect the DC milliammeter between TP603 (+)
and TP602 (-).
(Full Scale: 3 mA Range)
4. Beam current must be within 990 50
µ
A.
115cd/m21.8cd/m2
1
2
3
Waveform and others
CRT CUT-OFF, BACKGROUND AND SUB-CONTRAST ADJUSTMENT
4
No.
Adjusting point
Adjusting procedure/conditions
1V
3.0 Vdc
0
±
12

13
654321
A
B
C
D
E
F
G
H
14V-L70M
MODEL 14V-L70M CHASSIS LAYOUT

14
654321
A
B
C
D
E
F
G
H
14V-L70M
BLOCK DIAGRAM

16
14V-L70M
15
121110987654321
A
B
C
D
E
F
G
H
MODEL 14V- L70M BLOCK DIAGRAM

17
14V-L70M DESCRIPTION OF SCHEMATIC DIAGRAM
NOTES:
1.Theunitofresistance"ohm"isomitted.
(K=k  =1000  ,M=M  )
2. All resistors are 1/16 watt, unless otherwise noted.
3. All capacitors are µ F, unless otherwise noted.
(P=pF=µµF)
4. (G)indicates ±2% tolerance may be used.
5. indicates line isolated ground.
6. indicates hot ground.
VOLTAGE MEAS UREMENT CONDITIONS :
1. All DC voltages are measured with DVM connected
between points indicated and chassis ground, line
voltage setat120V AC and all controls setfor normal
picture unless otherwise indicated.
2. All voltages measured with 1000µ V B &W or Color
signal.
WAVEFORM MEAS UREMENT CONDITIONS:
1. Photographs taken on a standard gated color bar
signal, the tint setting adjusted for proper color.The
wave shapes atthe red, green and blue cathodes of
the picture tube depend on the tint, color level and
picture control.
2. indicates waveform check points (See chart,
waveforms are measured from point indicated to
chassis ground.)
 AND SHADED ( ) COMPONENTS
=S AFETY RELATED PARTS.
 MARK=X-RAY RELATED PARTS.
This circuit diagram is a standard one, printed circuits
may be subject to change for product improvement
without prior notice.
WAVEFORMS
 1.0Vp-p
Horiz. Rate Horiz. Rate Horiz. Rate Horiz. Rate Horiz. Rate
Horiz. Rate Horiz. Rate Vert.Rate Horiz.Rate Horiz. Rate
Horiz. Rate Vert.Rate Horiz.Rate Horiz. Rate Power S upply Rate
 2.8Vp-p  2.6Vp-p  2.7Vp-p  65.0Vp-p
 67.0Vp-p
 8.4Vp-p  40.8Vp-p  98.0Vp-p 1,160Vp-p  415.0Vp-p
 80.0Vp-p  3.0Vp-p  2.3Vp-p  116.0 Vp-p

18
654321
A
B
C
D
E
F
G
H
14V-L70M
SCHEMATIC DIAGRAM: CRT Unit

21
654321
A
B
C
D
E
F
G
H
14V-L70M
PWB-A: MAIN Unit (Wiring Side)
PRINTED WIRING BOARD ASSEMBLIES
J404
J410
RED
J403
J408
WHITE
328
CH UP
CH DOWN
S1002
VOL UP
S1003
VOL DOWN\
S1004
PIC/
PRESET
RMC1001
C303
C324
346
J15 345
12
IC302
J16 8
IC301
C322
R323
729
C323
309
313
C307
721
C382
P304
P301
P302
722
P303
C315 J14
R336
204
812
140
811
R332
421
430
431
DUNTKA541WE
QPWBFA541CEN4
QKITPA541CEN4
SPC
8
324
806
207
205
227
D756
L803
C302
116
343
D302
R309342
803 905
C310
713
C312
701
C304
C1016
D301
J1
C1014
D757
366
R1013
R760
C656
C655
C812
C811
C813
C651
C533
R533
D531
L205
137 138
320
355
354
C653
C652
425
C359
D532
222
221
223
224
229
225
715
411
R218
232
330
C206
127
326
226
R231
D202
337
32
807
102
410
433
J14
321
109
111
R219
TP201
VT
CLK
5V
33V
IF
DATA
AGC
5P1002
325
TU201 J5
C201
D201
C204
L202
D203
L203
C202
J2
134
J15
(BC)
152
154
153 901
J409
319
L253
CF253
C365
808
R367
404
R663
418
209
208
214
R264
213
212
R515
809
903
126
C360
414
304
L1030
C1006
R1045
C1003
335
306
D805
D804
L1050
J12
C1010
L1051
415
D802
D803
356
367
124
D806
D503
D1031
D1004 R1031
D801 R510
130
R758
711
C801
D502
315
J17
D651
101
333
201
C309
C320
704
314
308
120
C311
400
110
329 D755
RDA301
R318
R306
702
C301
R320 R761
Q752
EB
R756
D1012
R1042
117
424
402
R1012
C306
C321
R381
C381
700
J16 R308
147
146
C314
C1024
C332
916
3
(WI)
4
(HP)
(S)
7
960
133
C316
805
217
C1026
318
C1002
5
C1015
64
IC1005
C1020
8
C808
IC801 X1001
5
358
412
902
P1001
J17
(K)
C803
409
327 L802
115
C1019
310
C807
C806
C805
323
322
R658
C252
303
914
913 R513
122
121
R809
D653
D1005
CF252
CF251
C363
L252
R253
L251
Q252
B
E
L352
D451
L351
D452
D453
D454
FB451
R459
C412
J406 C352
156
C354
408
R461
(WO)
P407
3
FB452
C509
R216
C357
Q603
B
E
C604
401
C508
302 R507
D509
215
200
132
129
D604
R634
122
654321
D608
C512
106
R509
334
340
317 R618
D508
R641
108
R616
D510
R617
131
C605
R508
RDA501
R512
R615
T602
(H)
P602 R608
R605
R604
D601
R603
R614
Q501
D603
R610
TP651-3
P603 1 3
B
E
R609
D606
R630
D506
D507
307
D602
R633
D607
R623
C510
R607
D605
4
C620
R631
C602
C603
2
R502
IC501
71
6
C505
348
347
C515
119
D504
C503
R632
230 R506
233
706
C513
R514
C502
D505
D505
C610
709
C511
HM472
C514
HM726
(F)
R620
R753
710
C608
R619
105
R640
712
C501
R521
C640
206
216
104
HM752
B
E
Q601
R622
D331
C756
357
C757
C752
D752
422
D1017
FB331
F331
HM751
D751
C755
L751
Q751
D501
C754
C802
D807
J13 R819
R529
R755
352 349
D754
336
R754
EB
C1021
353
C815
155
D810
338 J11
C612
C759 R1074
C1013 14
C611
R625
219
R626
12
3
R501
R503 D511 J13
IC601
J4
IC702
107
D703
C706
R704
L752
TH701
TH700
C704
P701
2
1
C701
L701
RY701
191
C753
C333
125
FB751
F751 423
J4
350
SPCSPC
D710
192
1
P1003
C311
T701 C703
18
6
403
190
P705
802
R710
D704
R709
R707
HM746
717
716HM744
R701
HM747
RDA701
IC701
C712
D707
C707
R716 C710
R711
D706
HM748
103
C711
R712
C709
D712
D711
R705
D702
R708
144
D708
FB752
143
R713 D713
C708
D709
405
R706
R714
705
HOT
COLD
R752
RDA602
C751
FB601
R751
707
113
112
Q602
P380
C380
R380
E
C
10
R601
HM602
1
2
HM612
9
C601
R602
407
TP603
TP602
4
6
8
7
5
3
718
719
720
HM604
C606
R715
B
C705
HM614
904
HM613
T604
P601
L601305
T601
T603
801
C607 HM743
C613
C609
R621
1
2
34
10
S702
P702
FH702
POWER
FH701
T3.
VA701
141
142
P703
K701 15AL F701
K702
R703
D705
C721
D701
C702
PR701
PR702
L702
416
417 S1006
T CLINCH
N CLINCH
S1005
SC883
R883
360
R887
(L3)
(L2)
P881
C874
Q872
Q871
E
381
380
R886
E
382
E
B
B
Q883 D888
D883
B
C875
D884 D885
Q887
B
E
P882
Q885
R884
D887
BBE
Q870
B
(K)
5
C878
C882
D882
P883 R885
C886
L881
P884
C881
D881
4
G2
TP47R
TP47G
TP47B
(H)
QPWBFA
542CEN4
300
DUNTKA542WE
J7
J6
DUNTKA542WE
SC881
V2.5
8
7
6
5
4
10
9
3
13
1211
8
7
6
9
D886
C876
S1001
J3
J402
J2
J1
311 J10
C760
WHITE
J408
1
1
316
714 703
C305
1
21
J8
1
J9
33
(FR)
P403
16
(N)
8
220
(M)
P401
1
(SW)
P402
168
1
66
135 P404
L204
DIP
SF201
1
L451
J3
R882
1
PA543CEN4
1
3
1
4
P352
DUNTKA543WE
341
P351
(QKITPA541CEN4)
J351
332
C1001
D1001
123
D1002

22
654321
A
B
C
D
E
F
G
H
14V-L70M
PWB-A: MAIN Unit (Chip Parts Side)
RJ46
R315
RJ1
R1002
R1003
R1008
R1009
R1006
R1007
RJ38
R757
R307
C308
R305
RJ5
RJ8
RJ34 RJ24
RJ52
R316
R314
C313
RJ26
Q320
R1014
C1018
R1025
R1023
R1024
R1020
R1021
R1016
R1022
R1026
RJ75
R1047
R1050
R311
R1046
RJ72
C1005
R1034
R1038
D1019
C1009
D1018
C1011
C1008
C1012
R803
R801
R802
C814
C816
RJ9 C654
C531
R531
D1007
R804
Q802
C804
R808
R806
R805
RJ78
Q801 R8013
R304
RJ55
R530
C529
Q804
R1041
R1035
R1037
R1051 IC1003
C1004
R1040
R1072
R1039
R1036
R1073
R205
R337
RJ32
RJ4 RJ15
RJ49
RJ50
RJ53
R651
C211
R1066
RJ73
RJ2 RJ13
R430
RJ17
RJ10
RJ16
R362
R363
C205
RJ19
R1017
R1015
R365
R230
R464 R202
RJ21
R364
R201
C233
R332
R209 C209 C207
R433
C208 R220 R207
R206
R401
C232
R340
C231
R208
Q304
Q201 RJ14
Q401
C210
R251
R505
C251
C507 R504
R511
C504
R341
RJ37
RJ28
R261
R262
R263
R260
Q254
R259
R258
R257
Q253
R613
R611
RJ51
RJ71
R612
C409
RJ43
R653
R233
RJ42
C410 C532
C809
C234 R234
C657
R652R654
R656C658
R655
R812
R807
RJ77
C411
R532
R334
R432
RJ23
R335
R1010
R1011
RJ41