Philips FM24 Service Manual page 88

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EN 88 9.
9. Circuit Descriptions and List of Abbreviations
Index of this chapter:
1. General
2. Power Supply unit
3. VGA connector panel
4. SCAVIO panel
5. Audio Amplifier panel
6. LED/Switch panel
7. Plasma Display Panel
8. Abbreviations
9. IC Block diagrams
Notes:
• Figures can deviate slightly from the actual situation, due
to different set executions.
• For a good understanding of the following circuit
descriptions, please use the diagrams in chapter 6 and 7.
Where necessary, you will find a separate drawing for
clarification.
9.1 General
The FM24 is the 3rd generation Philips plasma monitors. In
comparison to the FTV1.9DE, it has:
• A power supply that is based on the one in the FTV1.9,
Video
NVM
D DDC
V
DVI-D
I
Y/H/V
Sync
decoder
Y/G YPbPr
Pb/B
AV3 Pr/R
H,V
1fH YUV
YC
Digital Video
AV2
Decoder
SAA7118
AV1
CVBS
3D Comb*
Loop thru of RGB
and H,V signals
from VGA1 only V
IN G
A
VGA2
OUT
2
NVM
DDC
RS
Sub-D
R S232C
RS232-C
232
9 P
C
ICONN
RC
out
V
G
In
VGA1
A
1
NVM
DDC
Audio Processing
L/R VGA in
L/R CVBS
L/R YC
L/R HD
L/R DVI
L/R Flex VGA
(only output in
Basic config.)
+9V_STBY
! All Functional blocks shaded grey are required for
the"Basic Configuration".
The remainder is required for the "Enhanced Configuration".
* are optional or prepared
FM24 Circuit Descriptions and List of Abbreviations
TMDS
H,V
RGB
Video + RGB+HV
RGB
Sync
ADC +
RGB+HV
switching
TMDS
Decoder
RGB+HV
AD9887
RGB+HV
De-interlacer
SDA9400
select
2
I C_Bu s-3
RS232C/
RGB+HV
PW/OTC
TTL
Switch
4052
ST
RS 232
Driver
IO Exp-
SC1
PCF8574
ADC Exp
PCF8591
RS232
Interrupt
RGB+HV
gener.
H and/or V
from VGA1
RS232C
activity int.
RC5 to E-box
Contro l
UART (Ebox)
MSP Audio Processor
MSP3415G
Audio Switch
TEA6422D
I 2 S
audio Audio Delay
Output
enable
32KSRAM CY7C1399
Switch
Figure 9-1 Control and Data Path
• A new SCAVIO panel, which takes over the tasks of the
former AVC and LIMESCO panels.
• A new class-D audio amplifier,
• A new, improved 42'' PDP (with new ALiS technology).
It is possible to use this product as stand-alone monitor or, in
combination with the so-called F21RE Receiver box, for TV
applications.
There are two configurations:
• Basic: which has one video input (VGA1) and one video
output (VGA2). The VGA2 video output is directly
connected to the VGA1 video input, without any
processing. The audio output of VGA2 is also directly
connected to the VGA1 audio input.
• Enhanced: which has six video inputs (VGA1, VGA2, DVI-
D, CVBS, YC and HD) and six corresponding audio inputs.
These inputs are internally converted to the appropriate
signals. The VGA2 connection is here bi-directional (Flex-
VGA).
Note: In all descriptions below, the Enhanced version of the
FM24 is discussed. When there are important differences
between the Basic and Enhanced versions, this is mentioned.
SRAM
NVM
Flash ROM
128kbyte
32Kbit
2Mbyte
2
I C_Bu s5
(sw bus to NVM)
RGB+HV
Digital PW
video
control
PixelWorks
PW164_10R or 10RK
YUV
Video Scaling
Digital
Co-processor
UART
PW
UART
OTC
OTC
Main Processor
SAA5801H/xx
H,V
I 2 C_Bus4
(sw bus to NVM)
Fan Control PWM
Sync.
Power OK, 5V test,
Interrupt
8V6 test
Gener.
service
int. pins
VGA1
Switch
4052
UART
Interrupt
gener.
+9V_STBY
Per channel
Tweeter
HP Filter +
Mute
Amp
LP Filter +
Mute
Amp
Low/Mid
I 2 S I 2 S
+9V_STBY
Audio Amplifier
Digitized in Heiloo, Holland
Serial Digital RGB with
LVDS
EPLD clock and Sync information
Encoder
EP1K30QC
DS90C385
PROM
for EPLD
Clock
generator
CPUgo =>
PDP go =>
<= IRQ_PDP
POWER_DOWN =>
Display
I 2 C_Bu s-1
Control
Power ON
Reset
Flash
ROM
3v3Stby/
2Mbyte
5vStdby
DRAM
2Mbyte
IO expander
NVM
PS U
32Kbit
PCF8574AT
AC/DC, DC/DC converters
Audio supply, 5V,8V6, 3v3, Vs,Va
Protection
3v3,5v Standby PSU
Fan driver
PSU
RC / LED / Switch Panel
IR RXr Light Red Green
(RC in) Sensor LED LED
31/8/2014
PDP
MPU
Vs,Va,Vcc Vsago
2x
FAN
PSU
*
2x
FAN
ON/OFF switch
(see description)
CL 26532038_006.eps
010502