Service manual

72
DV-NC55U/C/M
28 27 26 25 24 23 22 21 20 19 18 17 16 15
1 2 3 4 5 6 7 8 9 10 11 12 13 14
-
+
-
+
-
+
10K
-
+
10K
16K
16K
-
+
-
+
-
+
10K
16K
-
+
10K
16K
MUTE
REV OUTF
FWD OUTR
Loading Driver
VCC
-
+
10K 10K 10K
10K
-
+
10K
-
+
10K
-
+
10K
10K
- +
Level
Shift
- +
Level
Shift
-
+
10K
10K
10K
10K
-
+
10K
-
+
10K
-
+
10K
10K
- +
Level
Shift
- +
Level
Shift
• Block Diagram
11-12. IC7701 BA5984FP MOTOR DRIVER
Pin No. Terminal name Operation function Pin No. Terminal name Operation function
1 LD-FWD Loading driver FWD input terminal 15 V04(+) Driver CH4 Negative output
2 SL_IN(+) CH1 Former stage amplifier nonreverse input terminal 16 V04(-) Driver CH4 Positive output
3 SL_IN(-) CH1 Former stage amplifier reverse input terminal 17 V03(+) Driver CH3 Negative output
4 SLOUT CH1 Former stage amplifier output terminal 18 V03(-) Driver CH3 Positive output
5 SP_IN(+) CH2 Former stage amplifier nonreverse input terminal 19 GND Ground terminal
6 SP_IN(-) CH2 Former stage amplifier reverse input terminal 20 BIAS Bias input terminal
7 SP_OUT CH2 Former stage amplifier output terminal 21 MUTE Mute control terminal
8 VCC Power terminal 22 FO_OUT CH3 Former stage amplifier output terminal
9 LD(-) Loading driver Negative output 23 FO_IN(-) CH3 Former stage amplifier reverse input terminal
10 LD(+) Loading driver Positive output 24 FO_IN(+) CH3 Former stage amplifier nonreverse input terminal
11 SPIN(-) Driver CH2 Negative output 25 TR_OUT CH4 Former stage amplifier output terminal
12 SPIN(+) Driver CH2 Positive output 26 TR_IN(-) CH4 Former stage amplifier reverse input terminal
13 SL(-) Driver CH1 Negative output 27 TR_IN(+) CH4 Former stage amplifier nonreverse input terminal
14 SL(+) Driver CH1 Positive output 28 REV Loading driver REV input terminal
Note 1: Positive and negative output the driver have polarity with respect to input. (An example: 4 pin terminal voltage
‘HIGH’: 14 pin terminal voltage ‘HIGH’)