5
.3 MISCELLANEOUS
5
.3.1 Protection of the LD(Laser diode)
Short the parts of LD circuit pattern by soldering.
5
.3.2 Cautions on assembly and adjustment
Make sure that the workbenches,jigs,tips,tips of soldering irons and measuring instruments are
grounded,and that personnel wear wrist straps for ground.
Open the LD short lands quickly with a soldering iron after a circuit is connected.
Keep the power source of the pick-up protected from internal and external sources of electrical
noise.
Refrain from operation and storage in atmospheres containing corrosive gases (such as H2S,SO2,
NO2 and Cl2)or toxic gases or in locations containing substances(especially from the organic silicon,cyan,
formalin and phenol groups)which emit toxic gases.It is particularly important to ensure that none of the
above substances are present inside the unit.Otherwise,the motor may no longer run.
8
Summary of Contents for BBK938S
Page 1: ...SERVICE MANUAL BBK938S...
Page 13: ...7 MPEG BOARD CHECK WAVEFORM 7 1 27MHz WAVEFORM DIAGRAM 7 2 IC5L0380R PIN 2 WAVEFORM DIAGRAM 11...
Page 44: ...42 FRONT SCHEMATIC DIAGRAM...
Page 46: ...44 POWER BOARD SCHEMATIC DIAGRAM...
Page 48: ...OK SCHEMATIC DIAGRAM 46...
Page 50: ...48 OUTPUT BOARD SCHEMATIC DIAGRAM...
Page 55: ...53 MIAN SCHEMATIC DIAGRAM...
Page 56: ...54 MIAN SCHEMATIC DIAGRAM...
