Hitachi DV-P303U, Service Manual

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Reference Information
2-17
No. Symbol I/O Description
1 VH I HALL BIAS
2 FG O FG SIGNAL OUTPUT
3 ECR I TORQUE CONTROL REFERENCE
4 EC I TORQUE CONTROL SIGNAL
5 VCC2 — SUPPLY VOLTAGE
6 PC1 — PHASE COMPENSATION CAPACITOR
7 SIGGND — SIGNAL GROUND
8 VM — MOTOR SUPPLY VOLTAGE
9 CS1 I CURRENT SENSOR
10 S/S I START/STOP
11 DIR O 3-PHASE ROTATIONAL DIRECTION OUTPUT
12 SB I SHORT BRAKE
13 PWRGND — POWER GROUND
14 A3 O 3-PHASE OUTPUT 3
15 A2 O 3-PHASE OUTPUT 2
16 A1 O 3-PHASE OUTPUT 1
17 OPIN+ I OP AMP INPUT (+)
18 OPIN- I OP AMP INPUT (-)
19 OPOUT O OP AMP OUTPUT
20 VCC1 — SUPPLY VOLTAGE
21 AVM12 — BTL CH-1, 2 MOTOR SUPPLY VOLTAGE
22 DI4 I BTL DRIVE INPUT 4
23 DI3 I BTL DRIVE INPUT 3
24 DI2 I BTL DRIVE INPUT 2
25 DI1 I BTL DRIVE INPUT 1
26 DO1- O BTL DRIVE 1 OUTPUT (-)
27 DO1+ O BTL DRIVE 1 OUTPUT (+)
28 DO2- O BTL DRIVE 2 OUTPUT (-)
29 DO2+ O BTL DRIVE 2 OUTPUT (+)
30 BTLPGND1 — BTL POWER GROUND 1
31 BTLPGND2 — BTL POWER GROUND 2
32 DO3- O BTL DRIVE 3 OUTPUT (-)
33 DO3+ O
BTL DRIVE 3 OUTPUT (+)
34 AVM3 — BTL CH3 MOTOR SUPPLY VOLTAGE
35 DO4- O BTL DRIVE 4 OUTPUT (-)
36 DO4+ O BTL DRIVE 4 OUTPUT (+)
37 MUTE4 I BTL DRIVE MUTE CH 4
38 MUTE3 I BTL DRIVE MUTE CH 3
39 MUTE12 I BTL DRIVE MUTE CH 1, 2
40 AVM4 — BTL CH 4 MOTOR SUPPLY VOLTAGE
41 BIAS — BTL BIAS VOLTAGE
42 BTLSGND — BTL DRIVE SIGNAL GROUND
43 H1- I HALL1(-) INPUT
44 H1+ I HALL1(+) INPUT
45 H2- I HALL2(-) INPUT
46 H2+ I HALL2(+) INPUT
47 H3- I HALL3(-) INPUT
48 H3+ I
HALL3(+) INPUT