Loading Circuit - Panasonic SA-VK31GC Service Manual

SA-VK31GC / SA-VK31GS
18.7. (H) Transformer Circuit, (I) Voltage Selector Circuit, (J) CD Detect
circuit, (K) Spindle Position Circuit & (L) CD Loading Circuit
SCHEMATIC DIAGRAM - 18
TRANSFORMER CIRCUIT
VCC+
1
2
VCC-
3
TO
4
POWER CIRCUIT
AC GND
(H950/W950) ON
5
SCHEMATIC
6
DIAGRAM - 17
AC_IN
7
SUB B
8
SUB+B GND
9
CN950
FL2
1
-VP
2
FL1
3
SYS6V
TO
4
PANEL CIRCUIT
SYS6V
(H600/W600) ON 5
SCHEMATIC
PCONT
6
DIAGRAM - 13
SYNC
7
D_GND
8
ST_GND
9
CN951
CD DETECT
CIRCUIT
SW4
CD
D1
GP1S94
D1
SW5
SPINDLE
POSITION
CIRCUIT
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D950-D953
B0EAMM000038
D952
D950
C960
D954-D957
0.1
B0EAKM000125
D953
D951
D954
D955
D956 D957
C959
C950
0.01
25V4700
Q951
D959
B0EAKM000125
R959
R960 4.7
C958
50V100
4.7K
0.01
C956
63V100
R961
150
C957
2SB621ARSTA
100V10
VOLTAGE REGULATOR
Q950 Q952
B1BACD000017 KRC102MTA
SYSTEM 6V SYCHRONISING
VOLTAGE REGULATOR SWITCH
D966
R956 R955 R954
B0EAKM000122 10
10 10
Q950
C953
0.01
Q952
C963
R958
35V4.7
10K
Q952
R957 C952
C954
B0EAKM000122
10K 10V47
0.01
CD LOADING CIRCUIT
10 9
C2
0.01
M
W2
RM1
3
2
1
W2
3
2
1
4
3
2
1
LOAD
W1
4
3
2
1
W1
: -B SIGNAL LINE
: +B SIGNAL LINE
T950
ETP76VST62BA
FP950
4000
C955
FP951
1000
Q951
Q953
B1AAGC000007
(-VP)
POWER CONTROL
SWITCH
Q953
Q954
R951
B1AAGC000007
3.3K
CURRENT LIMITING
SWITCH
D961, 962
B0EAKM000122
Q954
C964
1000P D961
R963
820K
R952
1.2K
D967 R953
D968
B0AACK000004 1.5K
C951
0.01
D963
B0EAKM000122
D967
D964
B0BA7R000005
IC1
C0GAM0000005
MOTOR DRIVE
8 7 6 5 4 3 2 1
C1
16V100
R1 1K
D2
B0BA4R600003
Q1 L
PLUNGER
BOTTOMSW
POSITION
PSLED
SW2
PUSH
D_GND
SW1
P_GND
PUSH
SW3 OPEN
OPEN
CLAMP
CCW
DRIVEPOWER
Q1
B1GACFGG0004
HALF
POWER SUPPLY
CONTROL
70
VOLTAGE SELECTOR
CIRCUIT
S950
VOLTAGE SELECTOR
5 6
240
4 7
127 220
110
110
127
3 220 8
240
2 1
RL950
RSY0040M-0
1 2
3 4
D965
B0EAKM000122
F1
250V 3.15A
FC1 FC2
Z950
ERZV10V511CS
T951
G4C2AAJ00005
D962
1
2
3
4
5
6
SW2 TO
7 MAIN CIRCUIT
(CN2909) ON
8
SW1 SCHEMATIC
9 DIAGRAM - 4
10
11
12
13
14
CW
CN1
JK950
AC IN
110V/127V/
220V-230V/
240V
50Hz/60Hz