CD-C661H/HR
� When the turntable fails to stop.
Is from
5V 2.5V 0V
5 V till 2.5V down pulse (approx. 300 ms) No
Check the SWM3 and the wiring from the IC701 pin 21 to the SWM3.
input into the IC701 pin 21 when the turntable is rotating?
Yes Is there following voltage input on the IC701 pin 21 in the specific state? When the CD mechanism is moved up: 0V In other states: 4.3V Yes Check IC2 pin26 and the periphery.
No
Check the MECHA UP SW and the wiring from the IC701 pin 21 to the MECHA UP SW.
Yes IC701 defective.
� When turntable fails to move.
Is there following voltage input on the IC701 pin 21 in the specific state? When the CD mechanism is moved up: 0V In other states: 4.3V
No
Check the MECHA UP SW and the wiring from the IC701 pin 21 to the MECHA UP SW.
Yes
Is L output from the IC2 pin 26 during SEC when the disc skip switch is pressed? No
Check the wiring of IC2 pin 26 and Q93 pin 2. OK
Yes IC2 defective. Check turntable motor and turntable mechanism.
