Back Light Drive) Schematic Diagram - Sony MVC-FD97 Service Manual

PK-55 (BACK LIGHT DRIVE) SCHEMATIC DIAGRAM • See page 4-43 for PK-55 printed wiring board. • See page 4-71 for waveforms.
1 2 3
PK-55 BOARD (4/4)
BACK LIGHT DRIVE(BL BLOCK)
A
-REF.NO.:2,000 SERIES-
XX MARK:NO MOUNT
NO MARK:REC/PB MODE
BL_UNREG
B
11
PK-55 BOARD (1/4)
BL_GND
C
UN9112J-(K8).SO
4.9
PANEL_4.9V
LND851
SHIELD_GND
D LND852
Q851
SHIELD_GND
UN9214J-
(K8).SO
LND853
SWITCH
SHIELD_GND
2.1
LND854
SHIELD_GND
LND855
E
SHIELD_GND
F
14
BL_LEV
PK-55 BOARD (2/4)
05
4 5
Q854
L851
2SD2216J-QR(K8).SO
4.7uH SWITCHING
8.2
R856 R857
560
22k
7.8
7.7
C852
C859
C856 R858
22u
18p 560 27p
16V
C853
0.22u
Q852
R860
10k
SWITCH
±0.5%
4.9
R855
120k
±0.5%
C858
IC851 0.01u
10
0
4 1
DC/DC CONTROL
1 2 3 4
C857
0.022u
C851
0.01u
8 7 6 5
Q853
UN9213J-(K8).SO
PROTECT SWITCH
0
R854 2.5 0
C854
27k
2.2u
±0.5%
6.3V
R853 C855
6800
2.2u UN9213J-(K8).SO
±0.5%
SWITCH
4-53
6 7 8
Q856
FP102-TL
SWITCHING
L853
L852 R867
22uH 100uH 1800
5.3
3
8.2
4
2
7.7
5 R868
1 1800
-0.6
C861
C862
33u
1u
10V
FP216-TL
INVERTER DRIVE
D852
XX
C860
XX
R859
4700
R861
R864
1800
47k
±0.5%
Q857-859
BL LEVEL
Q857
2SD2216J-
1
QR(K8).SO
0.9
0.9
0.6
0.3 0.3 0
R862
R863 R865 R866
3300 Q859
1500 4700 1500
±0.5%
UN9213J-(K8).SO
Q855 Q858
2SD2216J-QR(K8).SO
9 10 11
T851
5
C866
12p
1
3000V
2 6
C864
3
0.015u
5.1
5.1
4 10
4 5
3 1
-0.6
Q860
2
Q861
UN9112J-(K8).SO
LED SWITCH R873
120
4.9 0
4.9
R869
100k
IC852
CURRENT DETECT
IC852
NJM2406F-TE2
D853
MA111-(K8).S0
4.9 1.7
C863
0.1u
4.9 0.3
R871
C865
R872
22k
0.1u
470
R870
6800
The components identified by mark 0 or dotted Les composants identifiés par une marque 0 sont
line with mark 0 are critical for safety.
critiques pour la sécurité. Ne les remplacer que
Replace only with part number specified. par une piéce portant le numéro spécifié.
4-54
MVC-FD97
12 13
ND801
CN851 10P BACK
LIGHT
10 BL_HIGH
9 N.C
8 N.C
7 N.C
6 N.C
5 N.C
4 N.C
3 BL_LOW
2 BL_LED
1 BL_CASE
R874
XX
BACK LIGHT DRIVE
PK-55 (4/4)