I-Board - Philips 32HF7445/93 Service Manual

Circuit Diagrams and PWB Layouts

i-Board

1
i-BOARD
HC
R80 68R
+5V +3V3STBY C50 C51
R119
R120 10pF 10pF
Res
0R
J4
12 11
10 9 R82 68R
8 7 C54 C55
10pF 10pF
D
6 5
4 3 LED_RED
2 1 R84 68R
C58 C59
B12B-PHDSS -B
10pF 10pF
Notice:
RC_IN
J4 connector
Even nos. to SSB
R86 68R
Odd no s. to IRLED
C62
10pF C63
10pF
C65
10pF
+12V
R99
NFR25-15R
R112
NFR25-15R
C
J5
1
2 MODE
STATUS_DATA-OUT
3
4
5
6 IR_OUT
6PIN-CONN
D3
1 6
2 5
3 4
BZA408B
B
J6 +12V
1 +12V
2
3 HSYNC
4 VSYNC
5 TXD232
6 RXD232
7
8 DCM_POR
9 CVBSTERR
10 GNDA D4 BZA408B
1 6 TXD232
10PIN-CONN GNDA RXD232
2 5 DCM_POR
HSYNC
3 4 VSYNC
+5VA
+5VA
R52
22K R55
C8 4K7
100nF R9 Q8
220R BC857BW
R53
47K
1
R7
A SR J3
100R
1 1
2
To TV 3 HSYN Q2 1
BD 4 VSYN BC847BW
5 R51 R54 Q9
10K 10K BC847B
R38 R8
5P-CONN-SR-V
220R 68R
GNDA VSYN
HSYN
3139 123 6123.1
1
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TPT1.1HA LA 7.
2 3
J15
1
2
3
4
Outside connect o r
R121 4PIN-CONN J10 +12V
Res 1
PC_TV_LED_OUT 2 BLM21P221SN1D
3 L17
C71
R81 68R PC_TV_LED 4
10pF
C52 C53
4PIN-CONN
10pF 10pF
L18
BLM21P221SN1D
LED_SEL_OUT
LED_SEL L25
R83 68R RC_IR
BLM21P221SN1D
R106 0R
Inside connect o r
C56 C57
+5VD
10pF 10pF
J14
U10 1
74HC1G86 2 BLM21P221SN1D
1 IR_IN TV 3 L24
4 C82
R85 68R 2 3P-CONN-PH-H 10pF
C60 C61
10pF 10pF
LIGHT SENSOR
L6 +5VD
+5V 6.8uH - 1210
R108 NFR254R7
+5V
D5 BAT760 + C6
2 1 +5VA
A K
100uF, 16V
L5
R109 0R RES
+5V 6.8uH - 1210
R87 0R - NL
+
C5
R111
100uF, 16V
1 3
I/P O/P
0R
+ + C70
C68
1UF C69 U9 220uF, 10V
1000 uF, 10V LF50CV
IRIN_DATA-IN
D6 BZX284-C5V1
2 1
A K
+5VA
C9
100nF
U2
HEF4053 BT
14 13
Za Y1a
12
Y0a
15 1
Zb Y1b
2
Y0b
R27
4 3
Zc Y1c
5
Y0c
LEDIN_CLK_TXD_SCL1 R10 100R 11 8
Sa Vss
IR-IN_DATA-IN_RXD_SDA1 R11 100R 10 7
Sb Vee
MODE R94 100R 9 6
Sc E
STATUS_DATA-OUT
IR_OUT
C11 +5VA
100nF
U3
14 13 SDA3
Za Y1a
12
Y0a
15 1 PEND_IR (not use)
Zb Y1b
2 RJIR_IN
Y0b
4 3 Tristate
Zc Y1c
+5VA 5 STATUS_DATA_OUT1
Y0c
11 8
Sa Vss
R48
Q3 10 7
Sb Vee
22K
BC857BW 9 6
Sc E
+5VA
1 HEF4053 BT
R17
+5VA
150R 0R
R104
C12
100nF
U4
R19
1 14
+5VA Za Y1a
10K Y0a
R18
1K0
Q4 15
Zb Y1b
R20
1
BC847BW
Y0b
Q5
10K
4
BC847BW
Zc Y1c
Y0c
11
Sa Vss
10
Sb Vee
9
Sc E
HEF4053 BT
+5VA
IR_IN TV
R2
+5V
100R R57 L12
47K R60 6.8u - 1210 +
C22
Q15 4K7
100uF, 16V
1 BC847B Q10
BC857BW
R58
1 C19 2
R42 V+
47K
100nF
R56
6
0R OPT
V-
10K C20 100nF
1
R41 TXD232 R62 100R 14
T1_OUT
2K2 R126 R59 7
T2_OUT
0R 10K Q11
BC847B RXD232 R61 100R 13
R1_IN
8
R2_IN
D9
BZX384-C2V7
2 3
32
4
Inside connect o r
J11
1 J1
+12V
2 4P-CONN-TYCO
C72
3 4
10pF
LCD Clock 3 SCL2
3P-CONN-PH-H 2 SDA2
1 +3V3STBY
C38 C39 L21
L7 C7 6u8
BLM21P221SN1D 100nF 27pF 27pF
R71 0R
+5V LCM_POW 220uF, 16V
2 3
J12
R73
+12V Q14 5
5
4K7 PBSS 5140U
4
4
R72
C83 LCM_POW
10pF 3 SCL2
1K 3
2 SDA2
2
1
1
5P-CONN-TYCO -NL
IR_PULLUP
+5VD +5VD
SP ARE IO
+5V
L8
J9
6.8uH - 1210 L20 3P-CONN-SR-V
+
R1 RP2
C26
100R 10K-RP
100uF, 16V
C34 C33 RP3
10K-RP
10nF 10nF
C27
100nF C30 C31
10nF 10nF
+5VD
C32
10K Q12 RP1 10nF 34
P0.3/AD3
BC847B 35
P0.2/AD2
36
P0.1/AD1
1 37
P0.0/AD0
38
VCC
39
NIC*
40
P1.0/T2
R28
LCM_POW 41
P1.1/T2EX
10K
TV_POR 42
P1.2/ECI
CLK_LED-IN_SCL1 43
P1.3/CEX0
DATA-IN_SDA1 44
P1.4/CEX1
R122 10K
+5VD
SR J2 R23
4P-CONN-SR-V +3V3STBY 4K7
R24
4
4K7
To TV 3 SDA
R25 100R
BD 2 SCL
1 R26 100R
+5VD
U11 C13 C14
74HC1G86 27pF 27pF
1
4
2
13
12 TXD
RXD
1
0R
R107
2
+5VD
3 IB_IROUT
5 RC_IR
R30
8 L11
7 6.8uH - 1008 5K6
6
U6 DCM_POR
DS1813
2 1 SW1
VCC RST
C25
4
1uF
3
C21 RESERVE
100nF
U7
1 C24 100nF
C1+
3
C1-
4 C23 100nF
C2+
5
C2-
11 R36 100R
T1_IN
10
T2_IN
12
R1_OUT
9
R2_OUT
R37 100R
ST202ECD
4
5 6
L22
68uH
+3V3
R113 1R5
U12 D7
MC34063 AD SS 24
L23
R114 R115
8 1 A K
Drive Switch
Coll ector Coll ector 6.8uH
1R5 220R
7 Ipk Sense 2 C79
Switch
+ + C80
C75 Emitter C78
220uF, 16V
6 3 10uF
Vcc Timing
Capacitor
C76
5 4 100pF
Comparator Ground
10uF
Inv. I/p
R116 R117 R118
470R
1K0 2K7
C77 1nF
Q7
100R
L19 R33
BLM21P221SN1D +5VD BC847B
R46 4K7
1
RP5
+
C18 10K-RP R47
C36
100nF 4K7
R124
100uF, 16V
10K
C35 U8
10nF SDA1 5 4
SDA VSS
R34 100R SCL1 SCL1 6 3
SCL E2
R35 100R SDA1 7 2
WC E1
SDA3 8 1
+5VD VCC E0
C42
+5VD MC24C16
100nF
R39 4K7
R40
4K7 R67 100R
22 SDA2
P2.4/A12
21 SCL2
P2.3/A11
20 R68 100R
P2.2/A10
19 STATUS_DATA_OUT1
P2.1/A9
18 +5VD
P2.0/A8
17 C84 100nF
NIC*
16
VSS
R69
15 C16 27pF
XTAL1
1K
14
XTAL2
13 X1
P3.7/RD
12 16MHz
P3.6/WR
C17 R22
27pF 100R
+5VD
R44 10K
R21
100R
U5
P89C664HBBD
MODE_R LED_SEL_OUT
PC_TV_LED
LIGHT SENSOR +5VD
RC_IR
IR_IN TV
TXD
RXD
RP4
10K-RP
RXD
TXD
R3
LED_SEL_OUT
1 J13
10K
2 Q1
BC847B
2PIN-CONN +5VD
TV_POR R29
2K2
C74
1UF
Q6
C37
BC847BW
10nF DGND1 DGND2
R32
1
22K
Q13
R63 47K R31 C15
BC847B
22K 1uF
1
R64
C41 10K
5 6
HC
+5V
D
D8 +
C81
220uF, 16V
C
B
R4
2K2
1
DGND3
A
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