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BEP
29AX9UM
SUB POWER
29AX9UM
SRS-WOW
29AX9UM
SCHEMATIC DIAGRAM MODEL : 29AX9UM
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY RADIATION PRECAUTION", "SAFETY NOTE:
PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON THE MANUAL FOR THIS MODEL. 1. RESISTOR Resistance is shown in ohm [K = 1.000, M = 1.000.000]. All resistors are 1/6W and 5% 4. Voltages read with DIGITAL MULTI-METER from point indicated to chassing ground, using a color bar signal with all
tolerance carbon resistor, unless otherwise noted as the following marks. controls at normal, line voltage 220 volts.
CAUTION: The international hazard symbols "*" in the schematic diagram and the parts list designate components 1/2R = Metal or Metal oxide of 1/2 watt 1/2S = Carbon compsistion of 1/2 watt 5. Waveforms are taken receiving color bar signal with enough sensitivity.
which have special characteristics important for safety and should be replaced only with types identical to those in the 1RF = Fuse resistor of 1 watt 10W = Cement of 10 watt 6. Voltage reading shown are nominal values and may vary ±20% except H.V.
original circuit or specified in the parts list. The mounting position of replacements is to be identical with originals. K = ±10% G = ±2% F = ±1%
Before replacing any of these components, read carefully the PRODUCT SAFETY NOTICE on the MANUAL for this 2. CAPACITOR Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in
model. Do not degrade the safety of the receiver through improper servicing.
?F, and the values more than 1 in pF.
All capacitors are ceramic 50V, unless otherwise noted as the following marks.
Electolytic capacitor Mylar capacitor
3. The parts indicated with " * " have special characteristics, and should be replaced with identical parts only.
POWER
29AX9UM
LED/CONTROL
29AX9UM
SIGNAL
29AX9UM
DEF
29AX9UM
BACK/T, CRTD-VM
29AX9UM
SERVICE MODE
1. ENTERING TO SERVICE MODE
GENERAL ADJUSTMENTS
1) Press o button once on 2) Press o button again to 3) While pressing the o button,
Remote Control. keep pressing. press MENU button on TV set.
Item S
Data
(or SOUND MUTE)
(Service mode display)
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode Adjustment mode
SPECIFIC INFORMATIONS
Item
Press Data
S
Press
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
A single horizontal line ON/OFF: - / - - button (on Remote) or a button (on TV)
Test signal selection : a button (on Remote)
Selection of the adjustment items : Channel s/t (on TV or Remote)
Change of the data value : Volume ; +/ (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory (QA02) : CALL + Channel button on TV (s)
Reset the count of operating protect
circuit to "00": CALL + Channel button on TV (t)
"RCUT" selection : 1 button
"GCUT" selection : 2 button
"BCUT" selection : 3 button
"CNTX" (or "SCNT") selection : 4 button
"COLC" selection : 5 button Color thickness correction
"TNTC" selection : 6 button note: Displayed differently as shown below, de-
Test audio signal ON/OFF (1kHz) : 8 button pending on the setting of the receiving color
Self diagnostic display ON/OFF : 9 button system.
COLP (PAL)
COLC (NTSC)
COLS (SECAM)
CAUTION : Never try to perform initialization unless you have changed the memory IC.
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4. SELECTING THE ADJUSTING ITEMS
1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2.
(t button for reverse order)
GENERAL ADJUSTMENTS
Refer to table-2 for preset data of adjustment mode.
(See SETTING & ADJUSTING DATA on page 18)
5. ADJUSTING THE DATA
1) Pressing of VOLUME ; +/ button will change the value of data in the range from 00H to FFH. The variable range
depends on the adjusting item.
6. EXIT FROM SERVICE MODE
1) Pressing POWER button to turn off the TV once.
s INITIALIZATION OF MEMORY DATA OF QA02
After replacing QA02, the following initialization is required.
1. Enter the service mode, then select any register item.
2. Press and hold the CALL button on the Remote, then press the CHANNEL s button on the TV. The initialization of QA02 has
been complated.
SPECIFIC INFORMATIONS
3. Check the picture carefully. If necessary, adjust any adjustment item above.
Perform "Auto search Memory" on the owner's manual.
CAUTION: Never attempt to initialize the data unless QA02 has been replaced.
7. TEST SIGNAL SELECTION
1) Every pressing of a button on the Remote Control changes the built-in test patterns on screen as described below
in SERVICE MODE.
Signal off NTSC signals (5 patterns)
PAL signals (5 patterns) Signals Picture
· Red raster
· Green raster
· Blue raster
· All White
· Black cross-hatch
* The signals marked with are not usable to display in the Test signal for some model.
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8. SELF DIAGNOSTIC FUNCTION
1) Press "9" button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among IC's are executed properly.
2) During diagnosis, the following displays are shown.
GENERAL ADJUSTMENTS
Indicated color of mode now selected : Green and Red
Indicated color of other modes : White
23****** Green : Normal
POWER : 00 Red : The microcomputer operates to provide judgement
BUS LINE : OK of no video signal. The red color is still indicated
B U S CONT : OK though the signal is input, failure may exist in input
BLOCK : UV V1 V2 signal line including QV01.
QV01
QV01 : In case of indication green ---Normal
In case of indication red with input signal----
Failure may exist in output line including QV01.
NOTE: Component which controls character display on
Part number of microcomputer (QA01)
screen is QT01 (TELETEXT IC.). If this display
SPECIFIC INFORMATIONS
Operation number of protecting circuit ----"00" is nor-
function fails to operate due to damage in QT01,
mal.
self diagnosis procedure is as follows.
When indication is other than "00", overcurrent apts to
(1) In case that power indicator is blinking with
flow, and circuit parts may possibly be damaged.
interval of 0.5 seconds; it means protecting
BUS LINE CHECK ----"OK" is normal.
circuit (Current limiter) is operating, and cir-
"SDA1-GND" ------------- SDA-GND short circuit.
cuit components may possibly be damaged.
"SCL1-GND" -------------- SCL-GND short circuit.
Check related components.
"SCL1-SDA1" ------------- SCL-SDA short circuit.
(2) In case that power indicator is blinking with
BUS CONT ----"OK" is normal.
interval of 1 second; Protecting circuit does
When indication shows "Q uuu NG", the device with
not operate, but a part of Bus line does not
the number may possibly be damaged.
operate normally. Check Bus line.
BLOCK
UV : TV reception mode
V1 : VIDEO 1 input mode (a1)
V2 : VIDEO 2 input mode (a2)
* The items marked with are not usable to display in the SELF DIAGNOSTIC FUNCTION for some model.
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DESIGN MODE
1. ENTERING TO DESIGN MODE
GENERAL ADJUSTMENTS
1) Select the Service mode. 2) While pressing o(or CALL) button on 3) Press MENU button on TV.
Remote and press MENU button on TV.
S D Press ITEM
DATA
Press
(Design mode) (Adjustment mode)
When QA02 is initialized, items "OPT0", "OPT1", "OPT2" and "OPT3" of DESIGN MODE are set to the data of the representative
model of this chassis family.
Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to
reset the data of items "OPT0", "OPT1", "OPT2" and "OPT3".
SPECIFIC INFORMATIONS
2. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL t button in the design mode changes the adjustment items in the order of table-3.
(s button for reverse order)
Refer to table-3 for data of design mode.
(See SETTING & ADJUSTING DATA on page 18)
3. ADJUSTING THE DATA
Pressing of VOLUME s or t button will change the value of data.
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