Philips FW C255 - Controls; System and Remote Control Functions

4-1
4-1
SET BLOCK DIAGRAM
FW-C255 Block diagram ...34280 dd wk148
VOL. 1
D
+12V_A
+12V_A
+12V_A
AMP_ON
A
MUTE
POWER SUPPLY
Rin = 3k
+F
250mV
ECO/SLEEP
A
## FEATURE PROVISION
FUSE
REGULATOR
L7805
+CD
CD_ON
VDC-3C
AM
# FOR VCD/MP3 VERSION
L/R SPEAKER
TUNER
SURROUND
MAINS
76dBA
16dB
I2C CLK
33R
CONTROL
(ETF7 ONLY)
KEY SCAN
+5V6
-CMOS (-9V)
MIC DET
I2C CLK
+12V_A
+9.1V
REGULATOR
7812
I2C
250nWb/m
+5V6_ECO
MAIN SIGNAL PATH
MEASUREMENTS ARE IN AUX MODE :
LEVELS AT MAX VOL
S/N AT 500mW\
HEADROOM (1% THD) WRT TO LEVEL AT MAX VOL
NOTE :
FOR CLASS G SWITCH
AMPLIFIER
+Z
REG
BASS
10M
VOL. 2
I2C DATA
FTD
SURROUND
TDA7468
MUTE
D
COMBI
+50V
TUNER
25mV
MUTE
+12V_A
A
SOFTWARE CONTROL
-33V
0.9W/6 ohms
+C
3.0dB
14 dB
D
+12V_M +12V_A
500mV / 1000mV
+5V6
VOLTAGE
LPS
NTC
F1
F2
LPC
+F
500mV
&
HP DET
+5V6
F2
-26 dB
CD_ON
PWDN
# FOR VCD/MP3 VERSION
(FOR CDC-L2C ONLY)
(+5V)
47R
AN17830A
POWER
FOR MATRIX
SA IN
SELECTOR
+C
STBY TRANSFORMER
MATRIX
2 X 37W
85dBA
3dB
HEADPHONE
FOR -/21 ONLY
D
A
M
HEADPHONE
CHOKE
+Z
N
CDC
CONTROL
A
ATTN.
SIMPLE
500mV
+
-
+
JOG
-CMOS
FUSE
FUSE
FUSE
FUSE
MPEG3
D
-6dB Track
+LPS
VIDEO OUT
A
1.0 Vpp
# VCD
# VCD
# VCD
# VCD
# PROVISION FOR VCD/MP3 VERSION
78dBA
3.2dB
-33V
CONTROL
650mV
CD SUPPLY
CONTROL
LPC
+CD
DECODER
(ONLY FOR -/37)
AM (80% MOD)
LED
+Z
TAPE
3CDC-L2C
CDC
CONTROL
+CD
250mV
-6dB Track
+12V_M
DM
CD_ON
AMP_ON
A
SA BUFFER
A
+12M
+12A
3.5mV
XX mV
YY dB\A
ZZ dB
2 X 6 OHMS
500mV
NJM4556AM
ECO-MTF
TAPE
-
ATTEN.
AMP_ON
HP_MUTE
1.90V
67dBA
1K
500mV
HP_OUT
F1x
TREBLE
HP DET
CONTROL
INTERFACE
+12V_M
uP
D
4 X DSC LEDS
+5V6
SIMPLE KARAOKE
+5V6_ECO
NTC
+F
FM (67.5 kHz)
INCREDIBLE
EEPROM
F1x
TMP87CS71F
D
RDS
SMPS
+5V6_ECO
F2x
(NOT USED FOR -/37)
(+5V)
+F
VOLUME
CONTROL
ECO6
AMPLIFIER
2.50V
+9.1V
CDC
CONTROL
+CD
+LPS
L
F1
LEFT/RIGHT
LEFT/RIGHT
-CMOS
POWER
+C
SWITCH
MIC DET
IS FILTER
+LPS
125mV
POWER
SWITCH
ECO POWER
CONTROL
I2C DATA
CONTROL
CONTROL
100mV
76dBA
16dB
-8.5dB
120mV
(NOT USED IN -/21 & -/37)
+C
REG
F2x
1K
HP_OUT
FRONT
PWDN
##
SOURCE SELECTOR
ATTN.
+9V
-33V
IR EYE
+5V6
-33V
AUX / CDR
+12V_A
TRAFO