DX-V888W
Y FL is not displayed.
Is pin 13 (/RESET) on IC14 "H" ?Check R108, C199 and the reset signal line.
No
Yes
Is a 27 MHz clock signal available at pin 71 on IC14 (ES3883F) ?X101 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(ES3883F) is poor, or the IC itself is defective.
signal available at pin 80 ?
Yes
Is a voltage of 3.5 V ? 0.2 V available at the Q101 (2SD1858 R2) Q101 or peripheral parts are defective.
emitter ?No
Yes
Is the signal shown in waveform drawings 1, 2 and 4 present atThe soldering on IC10, IC14, IC15 or IC18 is poor, or one or
No
pins 2, 4 and 5 on CNP102 ?more of the ICs defective.
Yes
When a button on the main unit or on the remote control is pressed,Pin 3 on CNP102 is broken or IC18 is defective.
does the signal on pin 3 (MSI) on CNP102 change ? (WaveformNo
drawing 3)
Yes
Is a clock signal being supplied to pin 29 (TDMCLK) on IC15
Check the traces and pin 7 on IC2 (TC9462F).
(ES4108F) ? (Refer to the waveform number 5 shown in page 29.)No
Yes
The soldering on IC15 (ES4108F) is poor or the IC is defective.
Disconnect pins 4 and 8 on BI101/CNS101.
Y ERROR is displayed.
Is noise entering at the pickup mechanism ? Is the abnormalCNS1A/B, CNS2A/B and CNS3A/B are disconnected or
No
operation so bad that the pickup moves to the outside of the disc ?broken.
Yes
Is a 16.9344 MHz clock signal available at pin 79 (CLKO) on IC2X1 is defective, or IC2 is defective.
(TC9462F) ?No
Yes
Is pin 9 (PUINSW) on IC4 "L" ?Check the PUINSW (SW4) on the pickup mechanism and the
Nosled motor (M702). See whether pin 2 on CNS3A/B is broken.
Yes
Is a signal present at pins 1 ~ 6 on IC4 ? (Waveform drawing 20 ~Check IC4 and the peripheral parts.
No
23)
Yes
The changer mechanism is defective.
Y The changer mechanism is abnormal.
When the OPEN/CLOSE button is pressed, is a signal present onThe soldering on IC15 (ES4108F) is poor or the IC itself is
No
pins 42 ~ 44 on IC4 ? (Refer to the waveform numbers 11 ~ 13defective.
shown in page 29.)
Yes
When the OPEN/CLOSE button is pressed, does the voltage levelIC4 is defective.
change at pin 7 or 8 on IC4?No
Yes
When the OPEN/CLOSE button is pressed, does the voltage levelCheck whether 7V is supplied to pin 6 on IC6. If so, IC6 is
change at pin 7 or 9 on IC6 ?Nodefective.
Yes
The loading motor (M981) is defective or the mechanism itself is
defecttive.
� 30 � |
ACEC
