Technics SL-DZ1200PP Service Manual page 162

3. Display-related
No LCD display
Can CD audio
etc. be heard?
Yes
There is the possibility of a defective
connection in the LCD wiring.
The LED does not
light.
Is the operation of
all switches without
problems?
Yes
There is the possibility of a defective
intermediate connection.
4. CD-related
The CD is not
recognized.
Defect related to the
SC/MD microcomputer
The CD cannot be ejected.
Defective EJECT SW
5. SD-related
The SD is not
recognized.
Defective SD
connector
No
Defect related to the SC
microcomputer
No
Defect related to the UI
microcomputer
Defective intermediate
connection
Defective intermediate
connection
Defective I/F IC
Defective power supply
circuit
Defective shutter operation
Defective shutter
switch
Defective MD
microcompute
Defective CD unit
Defective shutter
motor