Sharp CD-MPX870W, Service Manual

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CD-MPX870W
8 – 4
IC2 VHILA6261//-1: Focus/Tracking/Spin/Sled Driver (LA6261)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
* Set power system GND to the minimum potential together with SGND.
* Short-circuit three pins of power system SVSS and PVCC1 externally before use.
Pin No. Terminal Name Function
1 VO3+ BTL Output pin (+) for channel 3.
2 VO3- BTL Output pin (-) for channel 3.
3 VO2+ BTL Output pin (+) for channel 2.
4 VO2- BTL Output pin (-) for channel 2.
5 VO1+ BTL Output pin (+) for channel 1.
6 VO1- BTL Output pin (-) for channel 1.
7 PGND1 Power GND for channels 1,2,3 and 4 (BTL).
8 REGIN Regulator pin (External PNP base).
9 PVCC1 Power for channels 1,2,3 and 4 (BTL). (SVCC short-crircuited)
10 REGOUT Regulator pin (External PNP collector).
11 VIN1 Input pin for channel 1.
12* VIN1G Input pin for channel 1 (for gain control).
13 VIN2 Input pin for channel 2.
14* VIN2G Input pin for channel 2 (for gain control).
15 VIN3 Input pin for channel 3.
16* VIN3G Input pin for channel 3 (for gain control).
17 VIN4 Input pin for channel 4.
18 VIN4G Input pin for channel 4 (for gain control).
19 FWD5 CH5 Output change pin (FWD). Logic input for bridge.
20 REV5 CH5 Output change pin (REV). Logic input for bridge.
21 VCONT5 Input pin for CH5 output voltage control.
22 FWD6 CH6 Output change pin (FWD). Logic input for bridge.
23 REV6 CH6 Output change pin (REV). Logic input for bridge.
24 VCONT6 Input pin for CH5 output voltage control.
25 VREFIN Reference voltage input pin.
26 SGND Signal system GND.
27 SVCC Signal system power (PVCC1 short - circuited).
28 PVCC2 Power for channel 5 and 6 (H bridge).
29 MUTE Input pin for BTL mute.
30 PGND2 Power GND for channels 5 and 6 (H bridge).
31 VO6+ H bridge Output pin (+) for channel 6.
32 VO6- H bridge Output pin (-) for channel 6.
33 VO5+ H bridge Output pin (+) for channel 5.
34 VO5- H bridge Output pin (-) for channel 5.
35 VO4+ BTL Output pin (+) for channel 4.
36 VO4- BTL Output pin (-) for channel 4.