– 73 –
MD-C2
•
Changer disc loading is nor normal.
When a disc is loaded into the disc 1 position, does the
mechanism go to the disc 1 position?
Yes
No
Check the C1940, SW1940
Does pin 55 on IC1401 change to L?
No
Does either pin 7 or pin 9 on IC1602 change ? Check the IC1602, IC1401.
Check the lift motor, CW1904.
Yes
Yes
No
Is a disc loading ?
No
Yes
No
Check the IC1401.
Does either pin 27 or pin 28 on IC1401 change ?
Yes
Does either pin 12 or pin 13 on IC1601 change ?
Yes
When the MD RELEASE button is pressed, is the unloading
operation enabled.
Check IC1601.
No
No
OK
Yes
Check the loading motor(M1952), CN1401.
• Playback state cannot be set.
Is it impossible to set both high reflection disc and low
reflection disc to playback state?
No
Check as stated in item "TEST mode check".
Yes
Only the high reflection disc cannot be played back.
Yes
Is 1.02V±0.3V (high reflection disc) applied to the pin 93 of IC1401
in the TEST mode where the high reflection disc has been
inserted?
Only the low reflection disc cannot be played back.
Is 3.2V±0.3V(record enabled) or 2.06V± 0.3V (record disabled)
applied to the IC1401 pin 93 after the low reflection disc has been set?
No
Yes
Yes
After adjustment check as stated in item "Normal playback".
Check SW1930, MD mechanism switch PWB, and CN1920.
No
Yes No
To Next Page
Loading...
Need help?
General
