Philips HTR5000, Service Manual

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CONTROL BOARD
TABLE OF CONTENTS
IC Interbnal Block Diagram ............................................. 5-1
Circuit Diagram ................................................................ 5-2
PCB Layout Top & Bottom View ...................................... 5-3
5-1 5-1
PT6311 INTERNAL BLOCK DIAGRAM
HT48R05A INTERNAL BLOCK DIAGRAM
Voltages:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
0 0 0 0 3.8 3.8 0 3.8 3.7 0 0 0 0 0
PIN NO
Voltage 19.7 -22.2 -22.0 -11.2 -19.9 -17.8
PIN NO 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
Voltage -21.8 -15.6 -13.4 - 20 -13.4 -20 -22.4 -18 -20.3 -13.2 -15.8 -11.4 -4.6 -22.6 -20.4 -20.4 -20.4 -20.4 -20.4 -20.4
PIN NO 41 42 43 44 45 46 47 48 49 50 51 52
Voltage -20.4 -20.4 -20.5 -20.4 4.6 4.6 4.6 4.6 0 4.6 0 0.9
IC251 (PT6311)
PIN NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Voltage
5.1 5.1 5.1 0 5.1 0 5.1 0 0 4.9 4.9 5.2 0 0 0 0 0 0
IC252 (HT48R05A)
PIN NO b c e
Voltage 4.4 4.1 4.0
Q201 (2SA812)
PIN NO b c e
Voltage 4.9 0 4.8
Q202 (2SA1623)
PA0-PA7
TMR/PC1
WDTS
WDT
PORT C
PC0-PC1
PB0-PB2
PC1
INTC
M
MP
OSC2 OSC2
RES
VDD
VSS
ACC
Timing
Generator
Program
ROM
Instruction
Registor
Instruction
Decoder
Program
Counter
STACK0
STACK1
INT/PC0
Interrupt
Circuit
DATA
MUX
ALU
Shifter
Status
TMR
TMRC
M
Prescaiser
WDT Prescaiser
PCC
PC
PB
PAC
PA
PBC
BZ/BZ
PORT B
PORT A
RC OSC
fsus/4
fsys
U
X
Memory
U
X
M
U
X
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/KS13
SG14/KS14
SG15/KS15
SG16/KS16
SG17/KS17
SG18/KS18
SG19/KS19
SG20/KS20
GR1
GR2
GR3
GR4
GR5
GR6
Segment Driver /
Grid Driver
Display Memory
Control
Timing Generator
Key Matrix Memory
Serial
Data
Interface
General
LED
Dimming Circuit
OSC
K1 K2 K3 K4 VDD GND VEE
DIN
DOUT
CLK
STB
R
OSC
SW1
SW2
SW3
SW4
LED1
LED2
LED3
LED4
LED5
Grid Driver /
Key Scan Output
Input
Register
Driver
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