HOW TO ENTER SERVICE MODE TO KALLEY K-TV21PF & K-TV29PF with NTSC/PALm/PALn
KALLEY K-TV21PF & K-TV29PF with NTSC/PALm/PALn_CRT TV_Service Mode_Memory IC replacement_ ICs pin voltage chart
Used ICs - AN7522/7523(Audio Output)_TDA9859(Universal Sound Processor)_CD8145(EW
Parabola Correction)_LA78040/LA78045(Vertical Output)
MEMORY IC REPLACEMENT PROCEDURE
This TV uses memory IC. In the memory IC
are memorized data for correctly operating the video and deflection circuits.
When replacing memory IC, be sure to use IC written with the initial value of data.
When replacing memory IC, be sure to use IC written with the initial value of data.
(1) Power off. Switch the power off and unplug the power
cord from AC outlet.
(2) Replace IC. [Be sure to use memory IC written with the initial data values.]
(3) Power On. Plug the power cord into the AC outlet and switch the power On.
(4) Check and set SYSTEM default value:
1) Press “QV” key holding about 4 second and then press “MENU1” key on the Remote control unit. Or Press “TEST” key on the Remote control unit for factory used.
2) The “TEST” will be displayed on the screen.
3) Press digital key, (Mkey) and corresponding on-screen display will be appeared. Some time “PASSWORD” on-screen display will be appeared, you need to input 828.
4) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by [VOL+]/[VOL-] keys.
5) Press “STANDBY” key again and return to the normal screen.
(2) Replace IC. [Be sure to use memory IC written with the initial data values.]
(3) Power On. Plug the power cord into the AC outlet and switch the power On.
(4) Check and set SYSTEM default value:
1) Press “QV” key holding about 4 second and then press “MENU1” key on the Remote control unit. Or Press “TEST” key on the Remote control unit for factory used.
2) The “TEST” will be displayed on the screen.
3) Press digital key, (Mkey) and corresponding on-screen display will be appeared. Some time “PASSWORD” on-screen display will be appeared, you need to input 828.
4) Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [CH+]/[CH-] keys and set value by [VOL+]/[VOL-] keys.
5) Press “STANDBY” key again and return to the normal screen.
SERVICE ADJUSTMENTS
+B1 Voltage.
1. Receive normal colour bar signal.
2. Connect DC voltmeter to VD541- and isolated ground.
3. Adjust pot-meter in power unit to get the voltage as 110V ±1.0V for 21 inch hereinafter, 130 ±1.0V for 25 inch upwards.
2. Connect DC voltmeter to VD541- and isolated ground.
3. Adjust pot-meter in power unit to get the voltage as 110V ±1.0V for 21 inch hereinafter, 130 ±1.0V for 25 inch upwards.
FOCUS ADJUSTMENT
1. Receive a crosshatch signal.
2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible.
1. Receive a crosshatch signal.
2. While watching the screen, adjust the FOCUS VR to make the vertical and horizontal lines as fine and sharp as possible.
EW ADJUSTMENT (only upper 25 inch)
1. Adjust VR433 for horizontal size, to get 90% of horizontal picture contents would be displayed on CRT.
2. Adjust VR432 for EW parabola, to straighten the vertical at the sides.
3. Adjust VR431 for EW trapezium, to set the line at the sides vertical.
1. Adjust VR433 for horizontal size, to get 90% of horizontal picture contents would be displayed on CRT.
2. Adjust VR432 for EW parabola, to straighten the vertical at the sides.
3. Adjust VR431 for EW trapezium, to set the line at the sides vertical.
BUS CONTROL ADJUSTMENT
1. first color value set to 0, then Press “TEST” key on the Remote control unit of factory.
Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared. But to enter M4-M9, Must input pass code 828.
On TV screen “TEST” will be indicated, this means entered bus control mode.
And press following key, each function will be available.
3. may be entered TEST mode with remote control unit of user, press QV key and hold 4 seconds. And then press MENU key, TV set may be entered TEST mode.
1. first color value set to 0, then Press “TEST” key on the Remote control unit of factory.
Press “0” to “9“ key, (Mkey) and corresponding on-screen display will be appeared. But to enter M4-M9, Must input pass code 828.
On TV screen “TEST” will be indicated, this means entered bus control mode.
And press following key, each function will be available.
3. may be entered TEST mode with remote control unit of user, press QV key and hold 4 seconds. And then press MENU key, TV set may be entered TEST mode.
M1 menu
MENU0 Geometrical adjustment (Receive PAL standard complete pattern signal.)
a) Adjust V. SLOPE, to the center horizontal line just appear from half bottom shadow.
b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT.
c) Adjust V. SHIFT, the center horizontal line correspond to CRT vertical center.
d) Adjust H.SHIFT, to get the picture horizontal center correspond to CRT horizontal center.
MENU0 Geometrical adjustment (Receive PAL standard complete pattern signal.)
a) Adjust V. SLOPE, to the center horizontal line just appear from half bottom shadow.
b) Adjust V. SIZE, to get 90% of vertical picture contents would be displayed on CRT.
c) Adjust V. SHIFT, the center horizontal line correspond to CRT vertical center.
d) Adjust H.SHIFT, to get the picture horizontal center correspond to CRT horizontal center.
Receive NTSC signal and
repeat above [M0] and [M1] adjustment.
M2 Menu [AGC Adjustment.]
Receive 60dBμ (1mV)VH color bar pattern signal, adjust AGC value voltage from high to low, to noise reduce gradually and just disappeared point.
M2 Menu [AGC Adjustment.]
Receive 60dBμ (1mV)VH color bar pattern signal, adjust AGC value voltage from high to low, to noise reduce gradually and just disappeared point.
M3 Menu [CRTcut off and white balance adjustment.]
Receive white signal.
a) CRT cut off adjustment.
1. Select “SC”, then automatically vertical scan will be stopped.
2. Adjust SCREEN control on Fly-back transformer to get the darkest single horizontal line (red, green, or blue, sometimes shows more yellow, more purple or more white).
b) White balance adjustment.
1. Select RD/BD menu.
2. Adjust RD/BD to get color temperature as x=281, y=311
c) Sub-Brightness adjustment. (Use stair case signal)
1. Select SB menu. 2. Adjust SB to get the darkest step being cutoff.
Receive white signal.
a) CRT cut off adjustment.
1. Select “SC”, then automatically vertical scan will be stopped.
2. Adjust SCREEN control on Fly-back transformer to get the darkest single horizontal line (red, green, or blue, sometimes shows more yellow, more purple or more white).
b) White balance adjustment.
1. Select RD/BD menu.
2. Adjust RD/BD to get color temperature as x=281, y=311
c) Sub-Brightness adjustment. (Use stair case signal)
1. Select SB menu. 2. Adjust SB to get the darkest step being cutoff.
DEFAULT DATA SETTING & IC Pin VOLTAGES CHART
Click on the charts to magnify
The function of pin 20, 28, 29, 31, 32,
35 and 44 is dependent on the IC version (mono intercarrier FM demodulator /QSS
IF amplifier and East-West output or not) and on some software control bits.
The valid combinations are given in table.
The vertical guard function can be controlled via pin 49 or pin 50. The selection is made by means of the IVG bit in sub address 2BH.
The vertical guard function can be controlled via pin 49 or pin 50. The selection is made by means of the IVG bit in sub address 2BH.
When additional (external) selectivity is
required for FM-PLL system pin 32 can be used as sound IF input. This function
is selected by means of SIF bit in sub address 28H.
The reference output signal is only available for the CMB1/CMB0 setting of 0/1. for the other settings this pin is a switch output.
The reference output signal is only available for the CMB1/CMB0 setting of 0/1. for the other settings this pin is a switch output.