Philips LX 3700D, Service Manual

Page: 22 / 90

CONTROL / SPEAKER JACK
BOARD
TABLE OF CONTENTS
IC Interbnal Block Diagram & Voltage ............................. 5-1
Circuit Diagram ................................................................ 5-2
PCB Layout View ............................................................. 5-3
Electrical Parts List .......................................................... 5-4
5-1 5-1
CF745 INTERNAL BLOCK DIAGRAM
PT6311 INTERNAL BLOCK DIAGRAM
PIN NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Voltage 0 0 0 4.8 0 4.8 4.8 0 0 0 0 0 0 4.8 0 0 0 0
IC201 (BG2B83)
PIN NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Voltage 0 0 0 0 5 5 0.6 5 5 0.9 0 0 0 5 -18.5 -19 -19 -9.4 -17 -15
PIN NO 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Voltage -18.8 -13.3 -11.3 -17 -11.4 -17 -19 -14.6 -17.3 -11.4 -13 -9.5 5 -19.5 -17.8 -17.9 -17.9 -17.9 -17.8 -15.9
PIN NO 41 42 43 44 45 46 47 48 49 50 51 52
Voltage -16.5 -16.7 15.8 16 5 0 0 2.1 2.1 2.2 2.2 3
IC251 (PT6311)
PIN NO b c e
Voltage 4.6 4.1 4.1
Q204 (2SC945)
PIN NO c b e
Voltage 4.8 0 4.8
Q201 (2SA733)
PIN NO b c e
Voltage 4.8 0 4.8
Q202 (2SA733)
PIN NO b c e
Voltage 4.8 0 4.8
Q203 (25A733)
WDT TIME
OUT
8
STAC K 1
STAC K 2 EPROM /ROM
512 X 12 TO
2048 X 12
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
WA TCHDOG
TI MER
CONFIGURATION WORD
OSCILLATO R/
TI M ING &
CONTROL
GENERAL
PURPOSE
REG ISTER
FI L E
(SRAM )
24, 25, 72 or
73 B y tes
WDT/TMR 0
PRESCALER
OPTION REG.
“OPTION ”
“SLEEP”
“CODE
PROTECT ”
“OSC
SELECT ”
DIRECT ADDRESS
TMR0
FROM W
FROM W
“TRIS 5 ” “TRIS 6 ”
“TRIS 7 ”
FSR
TRIS A PORTA
TRIS B
PORTC TRISC
POR TB
FROM W
T0CKI
PIN
9-1 1
9- 11
12
12
8
W
4
4
4
DATA BUS
8
8
8
8
8
8
8
ALU
STATUS
FROM W
CLKOUT
8
9
6
5
5- 7
OSC1 OS C 2 MCLR
LI
T
ER
A
L
S
PC
“DISAB LE ”
2
RA <3:0> RB < 7 :0 >
RC <7: 0 >
( 28-Pin
De vi ces On ly )
DIRECT RAM
ADDRESS
Serial
Data
interface
LED
Driver
OSC
Timming
Generator
Segment
Driver/
Dimming
Circuit
Grid
Driver
Control
Genaral
Input
Register
Key Matrix
Memory
Genaral
Input
Register
SG1/KS1
SG2/KS2
SG3/KS3
SG4/KS4
SG5/KS5
SG6/KS6
SG7/KS7
SG8/KS8
SG9/KS9
SG10/KS10
SG11/KS11
SG12/KS12
SG13/GR16
SG14/GR15
SG15/GR14
SG16/GR13
SG17/GR12
SG18/GR11
SG19/GR10
SG20/GR9
GR1
GR2
GR3
GR4
GR5
GR6
GR7
GR8
VEE GND VDD K1
LED 5
LED 4
LED 1
SW 1
DIN
DOUT
CLK
STB
VDD
OSC
R
SW 2
SW 3
SW 4
LED 2
LED 3
K2 K3 K4
Grid
Driver/
Key Scan
Output
VOLTAGE