- 2-10 -
D
C
YES
NO
YES
YES
NO
NO
Does spindle rotate?
Proper DMSO signal on
MT1389
Check DMSO related
circuit on MT1389.
SP+ & SP- output
properly?
Check the spindle control
amp circuit of motor
driver.
Check the cable connection
between spindle and main PCBA.
YES
YES
NO
NO
Laser turns on when
reading disc?
NO
NO
YES
NO
YES
YES
NO
LD01 or LD02 output
properly?
Check the laser power circuit
on MT1336 and connecting to
power transistor.
Collector voltage of
power transistor is OK?
Check the related circuit on
laser power transistor
Check cable connection between
transistor ouput and pick-up
head.
Put disc in?
Laser off
Disc ID is correct?
Proper RFL signal
on MT1389?
Check the related circuit
on MT1389 RFL signal.
Check LDO1 & LDO2 signal
YES
Summary of Contents for DVT654
Page 9: ...2 3 3 FRONT CIRCUIT 1 2 PIN104 Pins PIN 27V PIN 6 18V PIN7 22V PIN 5V...
Page 24: ...2 18 FIG 7 2 DVD FIG 7 3 CD...
Page 25: ...2 19 FIG 7 4 CD FIG 8 1 DVD 8 FOCUS ON WAVEFORM...
Page 26: ...2 20 FIG 8 2 CD FIG 9 1 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION...
Page 27: ...2 21 10 TRACKING CONTROL RELATED SIGNAL System checking FIG 10 1 DVD FIG 10 2 CD...
Page 29: ...2 23 ADAT0 3 FIG 12 2 FIG 13 1 2 COMPOSITE VIDEO SIGNAL 13 MT1389 AUDIO OUTPUT TO PWM IC...
Page 30: ...2 24 FIG 14 1 14 AUDIO OUTPUT FROM PWM IC...
Page 31: ...2 25 WIRING DIAGRAM...
Page 38: ...SMPS 2 SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T 2 33 2 34...
Page 39: ...2 35 2 36 MICOM SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 40: ...2 37 2 38 I O SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 41: ...2 39 2 40 AMP SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 42: ...2 41 2 42 FRONT SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 43: ...2 43 2 44 H PHONE SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 44: ...2 45 2 46 AV2 SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 46: ...2 49 2 50 DSP SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 47: ...2 51 2 52 SERVO SCHEMATIC DIAGRAM A B C D E F G H I J K L M N O P Q R S T...
Page 48: ...3 53 3 54 PRINTED CIRCUIT DIAGRAMS MAIN P C BOARD TOP SIDE...
Page 49: ...3 55 3 56 MAIN P C BOARD BOTTOM SIDE...
Page 50: ...2 57 2 58 FRONT P C BOARD TOP SIDE FRONT P C BOARD BOTTOM SIDE...
Page 57: ......
Page 59: ......
Page 61: ...4 2 2 SPEAKER CENTER SECTION MODEL LHS 75SGC A700 750 751 753 756 754 758 759 756 755...
Page 62: ...4 3 3 SPEAKER REAR FRONT SECTION MODEL LHS 75SGS A800 851 853 850 857 856 858 854 855 859...
Page 63: ......
Page 87: ......
