DX-V88W
Y FL is not displayed.
When the ON/STAND-BY button is pressed, is the SHARP logo
Yes
displayed for about 2 seconds, and then is the power turned off ?
No
When the ON/STAND-BY button is pressed, pin 9 (PWON) onCheck the display microcomputer and the peripheral parts.
CNP602, on the MAIN PWB, changes from "H" to "L".NoMake sure that the power supplied to the microcomputer is 5V.
Yes
Does the PWON pin mentioned above return to "H" within about 2Check the voltage from the FL power supply, and check the FL
seconds ?filament to see if it is broken.
No
Yes (within 2 seconds )(2 seconds or more)
Whilst the PWON is "L", is pin 10 (PWOFF) on CNP602 "L" (within ?Whilst PWON is "L", check the voltage at each pin on CNP 701
Noon the power supply PWB. Check the output voltage on IC7 and
100 mV) ? Is pin 9 (PWOFF) on BI102/CNS602 on the display PWB
"L"?IC8. Check BI102/CNS602 for damage.
Yes
After connecting pin 4 (GND) to pin 8 (PWON) on BI701/CNS701
and forcing the power ON condition, press the ON/STAND-BY
button.
Yes
Is pin 13 (/RESET) on IC14 "H" ?Check IC13 (KIA7036) and the reset signal line.
No
Yes
Is a 27 MHz clock signal available at pin 71 on IC14 (ES3209) ?XL100 or peripheral parts are defective. The soldering on IC14
No
Is a 13.5 MHz clock signal available at pin 79 ? Is a 27 MHz clock(ES3209) is poor, or the IC itself is defective.
signal available at pin 80 ?
Yes
Is a voltage of 3.6 V ? 0.2 V available at the Q11 (2SD1858)Q11 or peripheral parts are defective.
emitter ?No
Yes
Is the signal shown in waveform drawings 1, 2 and 4 present atThe soldering on IC10, IC15, IC16 or IC18 is poor, or one or
Nomore of the ICs defective.
pins 2, 4 and 5 on CNP602 ?
Yes
When a button on the main unit or on the remote control is pressed,Pin 3 on BI102/CNS602 is broken or IC181 is defective.
does the signal on pin 3 (MSI) on CNP602 change ? (WaveformNo
drawing 3)
Yes
Is a clock signal being supplied to pin 96 (TDMCLK) on IC15
Check the traces and pin 7 on IC2 (TC9462).
(ES3210) ? (Refer to the waveform number 5 shown in page 29.)No
Yes
The soldering on IC15 (ES3210) is poor or the IC is defective.
Disconnect pins 4 and 8 on BI701/CNS701.
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ACEC
