Sony DSR-300P Service Manual page 20

IC
CXA1793N-E2 (SONY)
DRUM MOTOR DRIVER
—TOP VIEW—
U 1 GND 32
CS 2 31 V
VSC 3 GND 30
W IN 4 29 W
V IN 5 28 CS
U IN 6 27 VB
PCV 7 26 VS
8 GND 25 PCI
SL3 9 24 V
REF
SL2 10 23 OUT1
SL1 11 22 LIM
FC 12 21 IN1+
BR 13 20 IN1_
FR 14 19 OUT2
HSL 15 18 IN2H
STB 16 V 17
CC
INPUT
BR : SHORT BRAKE CONTROL (H : BRAKING)
FC : EXTERNAL CAPACITOR TERMINAL FOR SAW-TOOTH OSCILLATOR
FR : FWD/REV CONTROL (H : FWD)
HSL : SLOPE CURRENT SELECT
IN1+ : OPERATIONAL AMPLIFIER NON-INVERTING
IN1– : OPERATIONAL AMPLIFIER INVERTING
IN2H : OPERATIONAL AMPLIFIER
LIM : MAXIMUM OUTPUT CURRENT SELECT
PCI : PHASE COMPENSATION (CURRENT FEEDBACK)
PCV : PHASE COMPENSATION (VOLTAGE FEEDBACK)
SL1 - SL3 : SLOPE WAVE-SHAPING
STB : STADBY
U IN : U-PHASE DETECTION
V IN : V-PHASE DETECTION
VB : UN-REGULATED POWER
VREF : SERVO REFERENCE VOLTAGE
VS : MOTOR DRIVER POWER
W IN : W-PHASE DETECTION
OUTPUT
CS : DRIVING CURRENT
OUT1, 2 : OPERATIONAL AMPLIFIER
U : U-PHASE DRIVER
V : V-PHASE DRIVER
VSC : SWITCHING REGULATOR CONTROL
W : W-PHASE DRIVER
REF VOLTAGE
16
STB
REGULATOR
20
_
IN_
21
+
IN+
14
FR
15
HSL
MOTOR
12
FC PHASE
11
CONTROL
SL1
10
LOGIC
SL2
9
SL3
27
VB
18
+
IN2H
_
19
OUT2
9-12
16 23
STB OUT1
20 2
IN1_ CS
21 28
IN1+ CS
24 3
VREF VSC
22 7
LIM PCV
25 1
PCI U
14 31
FR V
12 29
FC W
15
HSL
11
SL1
10
SL2
9
SL3
13
BR
26
VS
27
VB
18 19
OUT2
IN2H
4
W IN
5
V IN
6
U IN
VREF LIM PCI
24 22 25
CS
_
_
+
+
DISTRIBUTOR
SHORT-BRAKE
CONTROLLER
3
FEME
13
BR
CXA8044Q-T4 (SONY)
BALANCED MODULATOR AND RF ENVELOPE DETECTOR
—TOP VIEW—
25 16
26 15
27 14
28 13
29 12
30 11
31 NC 10
NC
32 9
PIN PIN
I/O SIGNAL I/O
NO. NO.
1 — NC 17 —
2 – PB 5V 18 O
3 O S/H A 19 —
4 — V 20 I
CC
5 I PB PILOT 21 —
6 O PRE-AMP 22 I
7 I GCA 23 —
8 — NC 24 O
9 I GAIN CNT 25 —
10 — NC 26 O
11 I FH 27 I
12 I 3FH 28 O
13 I ATF SWP 29 I
14 I TRKG 30 O
15 — VREF 31 I
16 O BM OUT 1 32 O
5
PB PILOT PRE AMP
31
_
NFB
+
15
VREF GEN
VREF VREF
27
S/H A PLS
11
FH ENVELOPE
12
DETECTOR
3FH
ENVELOPE
DETECTOR
13
ATF SWP
14
TRKG
29
S/H B PLS
20
REF1
7 GAIN CONTROL BALANCED
GCA
AMPLIFIER MODULATOR
9
GAIN CNT
BALANCED
MODULATOR
22
REF2
VS
26 23
OUT1
28
CS
2
CS
SW REG 3
VSC
CONT
7
PCV
1
U
MOTOR 31
V
DRIVER
29
W
4
W
IN
5
V
IN
3
6
U
IN
5 6
PB PILOT PRE-AMP
31
NFB 32
15 OUT
VREF
27
S/H A PLS
25
LPF
11
FH
26
HOLD A
12
3FH
3
S/H A
13
ATF SWP 28
14 HOLD B
TRKG
30
ATF LOCK
29
S/H B PLS
20
REF 1
16
BM OUT 1
7
GCA
18
BM OUT 1
9
GAIN CNT 24
22 BM OUT 2
REF 2
SIGNAL
NC
BM OUT 1
GND
REF1
NC
REF2
NC
BM OUT 2
LPF
HOLD A
S/H A PLS
HOLD B
S/H B PLS
AYF LOCK
NFB
OUT
6
32
25
26
REF
+
S/H DC
3
AMP
_
A AMP
28
S/H SCHMIDT 30
B TRIG
16
BM OUT 1
18
BM OUT 1
24
BM OUT 2
DSR-300/P(J,E)/V2
PRE-AMP
OUT
LPF
HOLD A
S/H A
HOLD B
ATF LOCK