Sharp DX-SX1H Service Manual page 50

DX-SX1H
IC506 VHiBA6796FP-1: Loading/Focus/Tracking/Spin/Sled Driver (BA6796FP)
Pin Terminal
No. Name
1* OPOUT Operational amplifier output terminal
2 CH4-IN CH4 input terminal
3* CH4-IN' CH4 gain adjustment input terminal
4 CTL1 Control 1 input terminal
5 CTL2 Control 2 input terminal
6 FWD Tray forward input terminal
7 REV Tray reverse input terminal
8 TRAY-IN Tray input terminal
9 GND Substrate GND
10 CH5-OUT- Tray negative output terminal
11 COM-OUT Tray positive terminal/CH4 negative output terminal
12* CH4-OUT+ CH4 positive output terminal
13* CH3-OUT+ CH3 positive output terminal
14* CH3-OUT- CH3 negative output terminal
Note 1: Positive output/negative output means polarity toward input. (Ex. 18 pin output 'H' in case of 19 pin input 'H')
Note 2: Tray positive output/tray negative output means polarity toward mode. (Ex. 11 pin output 'H' in case of the forward mode)
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
28 27
- +
+
-
10K
1 2
CH4-IN
Mode Switching Table
For CTL1 and CTL2
CTL1 CTL2 CH1
L L
L H
H L
H H OFF
Note: Output: high impedance in case of OFF.
Function
CH3-IN CH2-IN
24 23 22
25
26
10K
13.3K
-
+
LEVEL SHIFT
T.S.D
26.6K
LOGIC
CTL1 CTL2 PWD REV
3 4 5 6
CH5-IN
Figure 50 BLOCK DIAGRAM OF IC
CH2 CH3 CH4
OFF
ON
ON OFF
Terminal
Pin
Name
No.
15 CH2-OUT-
16 CH2-OUT+ CH2 positive output terminal
17 CH1-OUT-
18 CH1-OUT+ CH1 positive output terminal
19 CH1-IN
20 CH1-IN'
21 VCC
22 CH2-IN
23* CH2-IN'
24* CH3-IN
25* CH3-IN'
26 VREF-IN
27* OPIN+
28* OPIN-
CH1-IN
21 20
VCC
10K
10K
13.3K
13.3K
LEVEL SHIFT
-
+ -
+
LEVEL SHIFT
V/I
7 8 9
For F and R (CH5 control is effective only in case of ON)
CH5
F
L
ON
L
OFF
H
ON
H
– 50 –
Function
CH2 negative output terminal
CH1 negative output terminal
CH1 input terminal
CH1 gain adjustment input terminal
VCC
CH2 input terminal
CH2 gain adjustment input terminal
CH3 input terminal
CH3 gain adjustment input terminal
Bias amplifier input terminal
Operational amplifier non-inversion input terminal
Operational amplifier inversion input terminal
CH1-OUT CH2-OUT
19 18 17 16
D D D
LEVEL SHIFT
D D D D
10 11 12 13
CH5-OUT CH4-OUT CH3-OUT
R Output Mode
L High impedance
H Reverse
L Forward
H Break
15
D
D
14