SERVICE MANUAL (BSV-4251 BSV-4251A )
7 ( POWER )
I
5V / 0V
LOCAL KEY INPUT PORT FOR POWER
8 ( VOL+ )
I
5V / 0V
LOCAL KEY INPUT PORT FOR VOL +
9 ( VOL- )
I
5V / 0V
LOCAL KEY INPUT PORT FOR VOL -
10 ( SRC/SEL )
I
5V / 0V
LOCAL KEY INPUT PORT FOR SOURCE
11 (MENU)
I
5V / 0V
LOCAL KEY INPUT PORT FOR MENU
12 (CH-)
I
5V / 0V
LOCAL KEY INPUT PORT FOR CH-
13 (CH+)
I
5V / 0V
LOCAL KEY INPUT PORT FOR CH+
1 ( 32V )
I
32V
Audio AMP POWER INPUT PORT
2 ( 32V )
I
32V
Audio AMP POWER INPUT PORT
3 ( GND )
0V
Audio AMP POWER GROUND PORT
J9
4 ( GND )
0V
Audio AMP POWER GROUND PORT
1 ( L OUT ) O Audio AMP LEFT OUTPUT PORT( 8
§Ù
)
2 ( L GND )
Audio AMP LEFT GROUND PORT
3 ( R OUT ) O Audio AMP RIGHT OUTPUT PORT (
8 §Ù
)
J10
4 ( R GND )
Audio AMP RIGHT GROUND PORT
1 ( S-SCL )
RS-232C CLOCK LINE
2 ( S-SDA )
RS-232C DATA LINE
3 ( FS )
J11
4 ( GND )
0V
1 ( VCC5 )
I
5V
5V Input
2 ( VCC5 )
I
5V
5V Input
3 (SCART_R)
I
0.7Vpp
±
0.1pp
SCART RED INPUT PORT
4 (SCART_G)
I
0.7Vpp
±
0.1pp
SCART GREEN INPUT PORT
5 (SCART_B)
I
0.7Vpp
±
0.1pp
SCART BLUE INPUT PORT
6 (SCART_FB)
I
+1V to +3V / 0V to 0.4V
SCART FAST BLANKING
7 ( GND )
0V
8 (FSCART_CVBS_IN)
I
1.0Vpp
±
3dB
SCART1 CVBS INPUT PORT
9 ( GND )
)
0V
10 (HSCART_CVBS_IN) I
1.0Vpp
±
3dB
SCART2 CVBS INPUT PORT
11 ( GND )
0V
12 ( FSCART_ID )
I
4:3 / 16:9
VIDEO STATUS
13 ( HSCART_ID )
I
4:3 / 16:9
VIDEO STATUS
14 ( GND )
0V
15 (F_CVBS_OUT)
O
1.0Vpp
±
3dB
SCART1 CVBS OUTPUT PORT
16 ( GND )
0V
17 (H_CVBS_OUT) O
1.0Vpp
±
3dB
SCART2 CVBS OUTPUT PORT
18 ( GND )
0V
19 (F_CVBS_L_OUT)
O
0.5Vrms
±
3dB
SCART1 AUDIO LEFT OUTPUT PORT
20 (F_CVBS_R_OUT)
O
0.5Vrms
±
3dB
SCART1 AUDIO RIGHT OUTPUT PORT
21 ( GND )
0V
22 (H_CVBS_L_OUT)
O
0.5Vrms
±
3dB
SCART2 AUDIO LEFT OUTPUT PORT
J1
23 (H_CVBS_R_OUT)
O
0.5Vrms
±
3dB
SCART2 AUDIO RIGHT OUTPUT PORT
MODEL NAME
DOCUMENT NO
REVISION NO
REVISION DATE
PAGE
BSV-4251/4251A RD(1)
00
03/10/23
19/75
