Philips MCW770 Service Manual page 21

BLOCK DIAGRAM
Lightbar WL
1462
1
6462
4
1463
1
6463
4
Communication
Light WL
TUNER BOARD
ECO 6
Systems / non Cenelec
buffer ampl.
V A V B 5
Stab Stab
Discriminator
FM-RF FM-IF 1 FM-IF 2
1101 V
Loop
(1102) LF filter
10,7 MHz 10,7 MHz 10,7 MHz
D
A 3 39 37 35 33 18 10
FM
43 FM
FM FM
IF2
IF1
Frontend Mixer Det.
FM-Osc. RADIO IC
FM Pre-
5
V
Osc. scaler TEA 5757H
Loop
Multi-
plexer
AM-Osc.
AM
6
AM-FRAME
V
Osc.
AERIAL Loop
1103
AM-RF
2
AM AM AM IF AM
Det.
Frontend Mixer
C
V
Loop AGC
1
8 Charge
B
V
pump
Loop
38
V A AFC
Stab
34
Stabilizer
V B
Stab
23 7 22 40 41 36 44 32 19 20
AM-IF 1 AM-IF 2 AM-AFC
Vdd Vcc1 Vcc2
450kHz 450kHz 450kHz
2
V A V B V B
Stab Stab Stab
5DTC - MODULE
for details see
separate block diagram in chapter 10
6-1
FRONT - CONTROL BOARD
+5V6_ECO
+5V6
CDC KEY BOARD
PROTECT
1450 1404
1 1
KEY2
KEY MATRIX
KEY2
4 4
1405
1 WL_IRQ
RESET FRONT
+D
WL_I2C_CLK
WL_I2C_DATA
POWER ON
not used
8
9
COMBI BOARD
9
WESSLI BOARD
1305 1 8
1206
1
7206 to/from 1011
SPECTRUM
1307 1022
+12V
4 ANALYZER
1 1 LINE_L
NC
LINE_R
NC
WIRELESS LAN CARD LEFT
+12V_A
RIGHT
1207
NC -VKK
1 7 7
1500 1020
1 1
7207
+12V_M
+12V 2 2
4
LINE_L
AUX IN
FILTER
MPX WL PC LINK
Vcc1
AUX
1013 TUNER
Vdd
RDS
TU_LEFT
1
(MPX) CD
Vcc2
VCO
FILTER
1120
TU_RIGHT
4
left 1
11 9
+12V_A LINE_R
left 14
TU_ENAB/MPX
Stereo right 15 4 right
TU_DATA
Decoder
stereo Vcc
TU_CLK
24
TU_STEREO
RDS
Version
(MPX) 8
enable 29 enable
data 28 data
clock 27 clock
CONTROL
stereo
8
31
P1
3
programmable
P0 30
output ports
+5V6
1015
CD_LEFT
15
Reference
Oscillator
CD_RIGHT
25
+5V_CD +5V_CD
75kHz
+12V_M
TRAY_I2C_SDA
TRAY_I2C_SCL
TRAY_IRQ
1824
uP_RESET
1
LEFT
uP_FRAME
uP_CLK
RIGHT
+5V
uP_DATA
+A
1
TRAY_I2C_SDA
TRAY_I2C_SCL
TRAY_IRQ
uC_RESET
uP_FRAME
uP_CLK
uP_DATA
15
7402
+uP 58
F2
+C 5V6
-33V
1
F1
+µP RESET
RESET
KEY2
20
7403
M I C RO P RO C E S S O R
T M P 8 8 C U 7 7 Z F
7407
SAA6581T
RDS
1401 1402
DECODER 12 MHz 32.768kHz
7408
1400 1403 19
1
1 1012 1026 19
7508
LINE_L, R 7, 22
Source Selector & Soundprocessor
8
SOURCE 17
SUR VOLUME I SOUND VOLUME II
SELECTOR
5, 24
3, 26
SUR
6, 23
12
4, 25
21
I 2 C Control
Power Supply
22 14, 15 1 27 28
+12V_A
I2C_CLK, I2C_DATA
I2C BUS
to/from 1012
7
7
6-1
+µP
2C_DATA 8
full
5
7406
+µP +µP
I2C BUS
6 EEPROM
PORT EXPANDER
1425
I2C_CLK
Intensity Lightbar top
VOLUME
+5V6
JOGVOL_A 7451
half
23
74HC4094D
16
SRG8
15
EN1
JOGVOL_B
24
1
STB
3
KEY1
18
KEY0
2 4 +5V6 +5V6
19 D 1
5
6452 6455
USB CD
6
7
KEY MATRIX KEY MATRIX
14
13
12
11
9
10
8
1
1
OVERVOLTAGE
PROTECTION
HEADPHONE AMPLIFIER
NJM4556AM
7400
square wave
500kHz
variable duty cycle
+52V
MUTE_HP
-45V
V1L+7,5V V1L+7,5V
square wave
500kHz
analog audio signal
variable duty cycle
f= 20Hz ...20kHz
5V
Level
shifter
Analog Pre-amp.
0V
NJM4560M
OFF ON
Modulator
+5V
+5V
DC
Level
speaker out OFF
shifter -37V
ON
-37V
5V
Square
wave
0V
Oscillator Driver
-45V
square wave
500kHz
-45V -45V
duty cycle 1:1 square wave
500kHz
+5V6
variable duty cycle
7406 -39V
M62320FP
13
2
-45V
MUTE_SW
3 5
D
10 OZ_SW
0
MUTE_HP
7
AMP_OFF
4
HP_DET
6
MIC_DET
9
11 AMP_RELAIS
12 CD_ON
8
+D
LOW_PWR_CTRL
+D2
1011 1010
1 10 1
1 1210 10 1 0201
1204
MAINS BOARD
Lightbar top - left
1415 1445
4 4
+5V6
6461
1 1
1418 1461
7450 4 4
+5V6
6460
7452
1 1
Lightbar top - right
+5V6_ECO
+5V6 +5V6 +5V6
6451 6454 6453 6401
TUNER AUX PC LINK STANDBY
1014 1449
HP_L
HP_LEFT 1 4
p
1448
HEAD-
HP_RIGHT
PHONE
HP_R
HP_DET
4 1 HP_DET
square wave
Power-amp. 500kHz
variable duty cycle
+AMP +45V
-45V
amplified analog audio signal
1307
f= 20Hz ...20kHz
V1L
output filter
1201
+12V_A
DC output
PROTECTION
-AMP
7243
+12V_M
FAN
1401
FAN 1
CONTROL
+12V_M
+12V_A
2
1104
+5V6
+5V_AMP
Block diagram MCW770, 190704