Philips DVDR615 Service Manual page 155

http://www.jdwxzlw.com/?fromuser=华盛维修
Circuit-, IC descriptions and list of abbreviations
Pin description
Symbol Pin Type
AEZ 1 I hy
pd
V 2 P
DDD3
V 3 P
SSD3
CLOCKOUT 4 T
OSCO 5 AO
OSCI 6 AI
TEST1D 7 I pd
AMEAS 8 AI
V 9 P
DDA1
V 10 P
SSA1
LASP 11 AO
VREFL 12 AO
VREFH 13 AO
VDEL 14 AI
VTHR 15 AI
VOPUREF 16 AO
VREFIN 17 AI
V 18 P
DDA2
V 19 P
SSA2
TEST1A 20 AB
IAPCW 21 AO
IAPCR 22 AO
TEST2A 23 AB
ENR2 24 T
ENR1 25 B pd
DVDCD 26 T
HILO 27 T
V 28 P
SSD1
V 29 P
DDD1
BUSY 30 B
SEN 31 B
SDIO 32 B
SCLK 33 B
WSB 34 B
家电维修资料网，免费下载各种维修资料
Drive Description
/Thr.
T Alpha Error Zero/Alpha Set Zero
- Digital Pad Supply
- Digital Pad Supply
M Buffered Oscillator Output
A Output of inverting Amplifier that forms oscillator
A Input of inverting Amplifier that forms oscillator
T Test pin
A Alpha Measure – value of measured disk writing
quality
- Analogue Supply
- Analogue Supply
A Laser Power – indicates power level
A Bandgap Voltage Reference ground connection
A Bandgap Voltage Reference output
A Voltage input for Delta "laser power"
A Voltage input for Threshold "laser power"
A Reference Voltage for OPU
A Input Reference Voltage for Vthr and Vdel
- Analogue Supply
- Analogue Supply
A Test pin
A Current Output of Delta Reference
A Current Output of Threshold Reference
A Test pin
M Programmable Output Flag
M/T Device Initialisation/Programmable Output Flag (must
be driven to VDD during reset)
M Programmable Output Flag for indicating DVD/CD
mode
M Programmable Output Flag for indicating High/Low
reflectivity
- Digital Pad Supply
- Digital Pad Supply
M/T Busy Enable input from Elantec / Board test IO
M/T Serial Enable output to Elantec / Board test IO
M/T Serial data input output from/to Elantec / Board test IO
M/T Busy Enable input from Elantec / Board test IO
M/T Write Strategy Bank – output controls OPU write
switching / Board test IO
DVDR615/69
Figure 9-27
9. EN 155