Panasonic PV-4601 A Service Manual page 181

Hi-Fi AUDIO/VIDEO HEAD AMP SCHEMATIC DIAGRAM
REC VIDEO SIGNAL
TO MAIN P3501
P3001- 7 UNSW +5V (VIDEO) 7
P3001- 11 Hi-Fi HEAD SW 11
P3001- 8 PB AUDIO 8
P3001- 9 REC AUDIO 9
5
P3001- 10 Hi-Fi DELAY REC (H) 10
P3001- 13 DELAY REC +12V 13
P3001- 14 CUE/REV/SS (L) 14
P3001- 16 REC/PB VIDEO 16
P3001- 17 PB (L) 17
P3001- 18 HEAD AMP SW 18
P3001- 19 ENVELOPE DET 19
P3001- 15 SW +12V 15
P3001- 20 HEAD SW 20
P3001- 6 UNSW +5V (SYS.CTL) 6
P3001- 2 CYL PG/FG 2
P3001-
4 UNSW +14V 4
4
P3001- 1 GND 1
P3001- 5 V-REF 5
P3001- 3 CYL ERROR 3
P3001- 12 GND 12
R2606
P3001- 21 GND 21 C2609
560
0.1
P3001- 22 FULL ERASE HEAD 22
FULL ERASE HEAD UNIT
P3504
FULL
1
FULL ERASE HEAD
ERASE
2
3 GND
HEAD
VJBS0482
TO D.D CYLINDER P3502
PIN- 8 UNSW +14V 8
PIN- 4 HE- 4
PIN- 6 HE+ 6
PIN- 1 MAIN COIL 3 1
PIN- 2 MAIN COIL 2 2
PIN- 3 MAIN COIL 1 3
PIN- 5 VH+ 5
PIN- 7 GND 7
2
UPPER CYLINDER
VIDEO SP
L HEAD PIN P3503
9 VIDEO SP L HEAD 9
VIDEO SP
R HEAD 7 VIDEO SP R HEAD 7
6 VIDEO LP/SLP R HEAD
VIDEO LP/SLP
4 VIDEO LP/SLP L HEAD
L HEAD
5 VIDEO LP/SLP L/R HEAD
VIDEO LP/SLP
8 VIDEO SP L/R HEAD 8
R HEAD
1
2 Hi-Fi AUDIO L/R HEAD
Hi-Fi AUDIO
1 Hi-Fi AUDIO HEAD R
L HEAD
3 Hi-Fi AUDIO HEAD L
Hi-Fi AUDIO
R HEAD
A B
(D,E)
PB VIDEO SIGNAL
REC AUDIO SIGNAL
L3501
C2606 C2605 C2604
0.1 0.1 0.1
0.1 13.0 13.2 1.2 3.9 3.9 3.9 5.1 2.9
18 17 16 15 14 13 12 11 10
VCC
CHARGE/
OSD
DISCHARGE CTL
IC2601
AN3813K
LOGIC
DRIVE
POSITION
CYLINDER
SIGNAL
BEMF
MOTOR
DET
DET
DRIVE PG/FG
PROCESS
CURRENT
SATURATION TORQUE
MOD
DET COMMAND WAVEFORM
SHAPER
GND
1 2 3 4 5 6 7 8 9
13.0 13.0 0.1 0.6 2.6 2.4 1.3 0.9
C2612
C2610
R2604 R2605
0.1
0.01
1 1.2
1/4W 1/4W
C2611
0.022
C2602
C2601 0.1
0.1
R2602
R2601
470
470
6
4
5
2
1
3
C D
PB AUDIO SIGNAL CYLINDER SERVO
100
C3504
R3501
C3505
0.01
47K
47/16V
C2607 C2608
C3507
0.1 0.1
0.01
WF48
C3506
0.1
(0.1) (0.1) (0.7) (5.1) (2.7)
12.0 0 1.3 0.1 2.3
5.0 0.7
36 35 34 33 32 31 30 29
GND GND GND
REC
PB +5V
ENVE
CTL PB
DET
IC3501
AN3361SB
SP LP/SLP
(HEAD AMP)
L R
AMP AMP
1 2 3 4 5 6 7 8
(0) (0)
2.6 (0) (0.3) (0.2)
WF49
0.7 0.7 1.4
4.2 1.4
C3511 C3513
C3533
C3503
0.1 0.1
0.01
0.01
C3508
C3512
0.1
0.1
C2603
R3503
R3502
0.1
56
56
R2603
470
E F
NOTE:
FOR SCHEMATIC AND C.B.A. DIAGRAM NOTES,
REFER TO BEGINNING OF SCHEMATIC SECTION (SECTION III).
R4401
1K
C4403
C4401
0.1
0.01
(4.8) (1.4)
(11.9)
0.5
5.0 0.5
12
28 27 26 25 24 23 22 21 20 19
LPF
AMP
AGC
DET
LP/SLP SP
R L
AMP AMP 13
(0.8)
0
9 10 11 12 13 14 15 16 17 18
(0.2) 0 0 (0.2)
(6.3) (6.3) (6.3)
2.2 2.2
0 0 0 C4404
0.1
C3528
C3520 C3519 C3524
0.1
0.1 0.1 0.1
R4403
R4407
220K
12
C3532
C3523
0.1
0.1
R3504
R3505
R3507
56
56
560
R4406 C4405
680 220P
WF50
TP3501
R3506
0
560
G H
L4401
100
C4406 R4421 TP4405
0.01 390
(3.6)
2.1
R4415
C4407 C4408
2200
0.01 100
/6.3V
C4415
R4416
470P
1800
WF51
C4409 C4416
C4418
C4402
0.01 0.047
0.01
0.01
(3.6)
(0) (0.8)
0.6 3.0 5.1 2.0 2.1 5.1
2.6 0
11 10 9 8 7 6 5 4 3 2 1
VCC
REC SW
BUFFER
AGC CTL
IC4401
L
BA7746FS
REC PRE R PRE
Hi-Fi AUDIO
AMP AMP AMP
HEAD AMP
GND
14 15 16 17 18 19 20 21 22 23 24
(0.6) (3.7) (0) (0) (0) (4.1) (4.1)
0 0 0.9 0.9 0.9 0 0
C4412
C4417 WF52
0.1
0.1
TP4401
R4412 R4419
1K 1K R4418
10
TP4402
C4411
C4410
0.01
0.01
TP4403
C4413
R4413
100P R4414 C4414
1500
1500 100P TP4404
UNLESS OTHERWISE SPECIFIED:
WATTAGE OF RESISTORS IS 1/10W.
VJBS5003
I J