Harman Kardon HD7725 - Page 15

HD7725
Ic TERMINAL PORT TERMINAL vo OUTLINE OF FUNCTIONS
NUMBER | NUMBER NAME CODE
1 FFI | RF summing amp. input terminal.
2 RFO fe] RF summing amp. output terminal.
3 AF- 1 RF summing amp. retum input terminal.
4 P/N ii Laser diode P/N select terminal.
5 LD fe) APC LD amp. output terminal.
6 PD li APC PD amp. input terminal.
7 PD1 t RE I-V_amp. (1) invert input terminal.
8 PD2 t RE I-V amp. (2) invert input terminal.
9 Ve : GND terminal.
10 F ! F |-V amp. invert input terminal.
WW E I E |-V amp. invert input terminal.
12 EO QO E I-V amp. output terminal.
13 EI I E |-V amp. retum input terminal.
Ic101 14 VR QO DC voltage output terminal.
15 cc2 U DEFECT signal input terminal.
16 cci ie] DEFECT signal output terminal.
17 VEE : Negative power terminal.
18 FE BIAS t Focus error amp. bias terminal.
19 FE ie] Focus error amp. output terminal.
20 TE fe] Tracking error amp. output terminal.
24 DEFECT oO DEFECT comparator output terminal. |
22 MIRR © _| MIRA comparator output terminal. |
23 CP. | MIAR hold capacitor connect terminal. |
24 CB t DEFECT hold capacitor connect terminal. |
25 OGND : GND terminal.
26 ASY i Auto asymmetry contro! input terminal.
27 EFM fo} EFM comparator output terminal.
28 FOK oO Focus OK comparator output terminal.
29 LD ON ! Laser diode on/off select terminal.
30 voc : Positive power terminal
3 TE IN Pre amp. input t Tracking error signal input terminal.
4 TG IN Pre amp. input i Track cross signal input terminal.
5 MR Pre a i ! Mirror detected signal input terminal.
6 Jump Flag Mi-com VO ie) Outputs "H" under jump function.
HF OK Pre amp. input i HF OK signal input terminal.
9 HFD Mi-com VO ie} "1" indicates that MR input is "1" and track servo loop is off (TS OFF, JF, JR).
10 DATA OUT Mi-com VO ie} Inner condition output changed by command modes.
14 JP Mi-com VO i 1 track jump control signal. Usually "H".
12 MSD Mi-com VO | Serial data input terminal (LSB first, 8-bit data).
13 MLA Mi-com VO | Latch signal of serial data from mi-com to servo IC.
14 MCK Mi-com VO | Clock signal of serial data from mi-com to servo IC. Receives data on
| leading edge,
15 ACLR Mi-com VO | All clear input (clear inner registors and flip-flops by "L" signal).
18 Bias Power supply ie} Vec/2 bias power supply output when single-pole power supply is used.
19 COM Power supply i Common terminal. Connect to GND when double-pole power supply is used
and to BIAS when single-pole power supply is used.
20 GND Power supply i GND terminal.
Ic102 ai VEE Power supply i Negative power terminal. Connect to GND when single-pole power supply is used.
22 CeFSR Focus supply f Connect capacitor which determines time constant of focus search waveform.
23 |-Ref Power supply I Terminal for connecting resistor for setting current value of reference current source.
24 Voc Power supply i Positive power terminal.
25 SS OUT Slide servo Qa Operation amplifier SS output.
26 ss - Slide servo | Operation amplifier SS reverse input.
27 [ss + Slide servo 1 Operation amplifier SS non-reverse input.
28 [ts ouT Track servo ie} Operation amplifier TA output. |
29 TS - Track servo | Operation amplifier TA reverse input.
30 TG2 Track servo : Track gain select switch TG2 output. Set to open or common level. i
a TS+ Track servo i Operation amplifier TA non-reverse input.
32 T@1 Track servo - Track gain select switch TG1 output. Set to open or common level.
33 TE OUT Track servo ° Operation amplifier TE output. |
34 JE-- Track servo | Operation amplifier TE reverse input.
35 FSA IN Focus servo I Focus search voltage level detector input.
36 FG Focus servo : Focus gain select switch FG output. Set to open or common level.
37 FS OUT Focus servo ie} Operation amplifier FA output.
38 FS - Focus servo | Operation amplifier FA reverse input.
39 FS + Focus servo I Operation amplifier FA non-reverse input.
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