Front Board - Philips FW-C255 Service Manual

6-1

FRONT BOARD

TABLE OF CONTENTS
Variation Table and FTD Display pin connection ............ 6-1
Chip Layout ...................................................................... 6-2
Component Layout .......................................................... 6-3
Circuit Diagram - Karaoke part ........................................ 6-4
Circuit Diagram - Microprocessor part ............................ 6-5
Circuit Diagram - Headphone / Miscellaneous part ........ 6-6
Electrical Parts List .......................................................... 6-7
Stroke Versions
Features / Item no. /21/21M/33 /30/37
Simple Karaoke x -
Mic Detect x -
RDS - -
ECO Power LED - -
1800 x -
1802 x -
3492 820R 820R
3565 4R7 2R2
3566 - 2R2
3567 4R7 2R2
3568 - 2R2
4411 x -
6429 x -
9401 x -
9402 x -
Remarks
Mic Socket
Karaoke
NTC
FTD Filament
FTD Filament
FTD Filament
FTD Filament
Karaoke
Karaoke
FTD Filament
FTD Filament
FTD DISPLAY PIN CONNECTIONS
1G 2G 3G 4G 5G
11G
a
j
f
h b
k
g
m
Col 1
B5
B4
n
r
e c B3
p
B2
B1
d
Dp
(2G - 9G)
12G 11G 10G 9G 8G
B1 B1 a a
P1
B2 B2 h h
P2
(Left)
B3 B3 j , p j , p
P3
(Middle)
P4 B4 B4 k k
(Right)
P5 B5 B5 b b
(Up)
P6 B6 f
P7 B7 m m
B8 g g
P8
B9 c c
P9
(1) (Low)
B10 e e
P10
(2)
B11 r r
P11
(3)
B12 n n
P12
- B13 d d
P13
- - -
P14
- - -
P15
- - - - -
P16
FTD DISPLAY PIN NO. 3 3 3 3 3 3 3 3 3
9 8 7 6 5 4 3 2 1
FUNCTION F - - - 1 2 3 4 5
2 G G G G G
6-1
6G 7G 8G 9G 10G
12G 11G
B5
B4
B3
B2
B1
(12G)
B10 B10
B9 B9
B13 B8
B8
B7 B12 B7
B6 B11 B6
(11G)
7G 6G 5G 4G 3G
a a a a a
h h h h h
j , p j , p j , p j , p j , p
k k k k k
b b b b b
f f f f f f
m m m m m
g g g
g g
c c c c c
e e e e e
r r r r r
n n n n n
d d d d d
Col - - - -
Dp - - - -
- - - - -
3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 9
0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
6 7 8 9 10 11 12 - - - P P P P P P P P P P P P
G G G G G G G 1 2 3 4 5 6 7 8 9 10 11 12 13
B5
B4
B3
B2
B1
2G 1G
a
h
j , p
k
b
f
m
g
c
e
r
n
d
-
-
-
8 7 6 5 4 3 2 1
P P P P - - - F
14 15 16 1