BBK DK1020S, Service Manual

Page: 35 / 177

Read DVD
disc
Read CD
disc
No disc
10 B
Input
MT1389
2.19 2.27 2.04 Disc data signal
11 F
Input
MT1389
2.07 2.44 2.03 Auxiliary signal used for trace
12 GND Grounding 0.01 0.01 0 Grounding
13 V20 Input loader 2.04 2.06 2.03 Reference voltage
14 Vcc Input loader 5.04 5.04 5.02 Supply voltage for loader
15 E
Input
MT1389
2.06 2.45 2.03 Disc data signal
16 NC
Hang in the
air
0.01 0 0 Not used
17 VR-CD Input loader 0.21 0.01 0
After being processed inside loader, ensure MD
is 180mV when reading CD disc.
18 VR-DVD Input loader 0.01 0.2 0
After being processed inside loader, ensure MD
is 181mV when reading DVD disc.
19 LD-CD Input loader 0.09 2.1 0 CD laser power control signal
20 MDII
Input
MT1389
0.21 0.2 0 Laser power monitoring signal of CD and DVD
21 HFM Input loader 5.04 5.04 5.02
High frequency overlap signal. Generate laser
with different wavelength inside loader.
22 NC Unused 0.01 0.1 0
23 LD-DVD Input loader 2.21 0.1 0 DVD laser power control signal
24 GND Grounding 0.01 0.01 0 Grounding
Pin
Number
Pin Name
Flow
Direction
DC Voltage
Function Description