3-7
C
LD01 or LD02 output
properly?
Laser turns on when
reading disc?
Put disc in?
Disc ID is correct?
Does spindle rotate?
D
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Check the laser power circuit
on MT1389D and connecting
to power transistor.
NO
Collector voltage of
power transistor is OK?
Check the related circuit on
laser power transistor
NO
Check cable connection
between transistor ouput
and pick-up head.
YES
YES
YES
Check the related circuit on
MT1389D RFL signal.
Check DMSO related
circuit on MT1389D.
NO
NO
Check the spindle control
amp circuit of motor driver.
NO
Laser off
Proper RFL signal on
MT1389D?
Check LDO1 & LDO2 signal
Proper DMSO signal on
MT1389D
SP+ & SP- output properly?
Check the cable connection
between spindle and main
PCBA.
Summary of Contents for DV140
Page 25: ...3 15 FIG 7 2 DVD FIG 7 3 CD F F FE FE RFL RFL...
Page 26: ...3 16 FIG 7 4 CD 8 FOCUS ON WAVEFORM FIG 8 1 DVD FE FOSO F F F FE RFL...
Page 30: ...3 20 2 COMPOSITE VIDEO SIGNAL FIG 13 2 13 AUDIO OUTPUT FROM AUDIO DAC FIG 13 1...
Page 37: ...3 28 3 29 2 AV JACK CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 38: ...3 30 3 31 A B C D E F G H I J K L M N O P Q R S T 3 SYSTEM CIRCUIT DIAGRAM...
Page 40: ...3 34 3 35 5 TIMER CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 42: ...3 38 3 39 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...
Page 44: ...3 42 3 43 4 SMPS P C BOARD 360mm ONLY LOCATION GUIDE 430mm ONLY...
Page 45: ......
