SHARP CDCH1000H Repair Manual

CD-CH1000H/CD-CH1000W
Check in the CD test mode.
STEP 1
Does the display "E-CD01" appear?Check the line of PU-IN SW.
Yes
Check from pin 2 of CNP6 via pin 25 of CNP1 to pin 94 of
No
IC901.
Does the pickup move to the inner/outer position using theCheck the line of the slide control.
'UP'/'DOWN' key?NoCheck from pins 3 and 4 of CNP6 via pins 17, 18 and 22 of
IC5 to pin 40 of IC2.
Yes
STEP 2
Laser ON?Check from pins 7 and 8 of CNP5 via Q4 and pins 6 and 7 of
No
IC6 to pin 38 of IC2.
Yes
STEP 3
Focus search?Check from pins 3 and 4 of CNP5 via pins 1, 2 and 6 of IC5 to
No
pins 29 and 33 of IC2.
YesCheck from pins 1, 3 and 4 of CNP7 to pins 2 and 3 of IC6.
STEP 4
Focus search?Check from pins 5 and 6 of CNP6 via pins 19, 20 and 21 of
NoIC5 to pin 41 of IC2.
Yes
STEP 5
Tracking servo?Check from pins 1 and 2 of CNP5 via pins 3, 4 and 5 of IC5 to
No
pins 31 and 34 of IC2.
Yes
Check from pins 2 and 5 of CNP7 to pins 4 and 5 of IC6.
RF signalCheck from pins 21, 22 and 23 of IC6 to pin 24 of IC2.
No
Yes
AUDIO signalCheck from pins 50 and 53 of IC2 to pins 24 and 28 of
No
CNP1.
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