Philips MCM8/21 Service Manual page 11

SET BLOCK DIAGRAM
+CD +12V_M
-6dB Track
MP3 UL-ICD03
285mV
CDC
D A M D
CONTROL
AUX / CDR
500mV / 1000mV
ATTN.
-8.5dB
125mV
A
-CMOS +12V_D +12V_A
28mV
250nWb/m ATTN.
ETF8
-25dB
ETF8
M A
CONTROL
+5V6 +D
+C
SOURCE / VOLUME LEDS
ECO POWER
LED
SHIFT
REGISTER
NTC
POWER
PWDN
CONTROL
LPC
RDS
DECODER
uP
TUNER
TMP88CU74YF
CONTROL
UL-CD
D
CONTROL
EEPROM
ETF8
CONTROL
+D
ADC
KEY SCAN
HP_DET
650mV
+C
78dBA
3.2dB
HP DET
HP_OUT
HEADPHONE
4-1
+12V_A
125mV
FM (67.5 kHz)
ECO6
AM (80% MOD)
TUNER
A
CONTROL
SOFTWARE CONTROL
SOURCE SELECTOR
IIC
IIC_DATA1 IIC_CLK1
500mV
COMBI
CONTROL
IIC_DATA1 IIC_CLK1
+G +D
+C
+5V6
-33V
+5V6_ECO
+C
IR EYE
F1x
FTD
F2x
BASS & TREBLE VOLUME
CONTROL CONTROL
+D
F1x F1
+D
F2x F2
-33V
FRONT
+9.1V
+9.1V
TDA7468
INCREDIBLE
TREBLE
LEFT/RIGHT
SURROUND VOL. 1 & VOL. 2
BASS
INTERFACE
500mV
A D
SIMPLE
HP_MUTE
IS FILTER
HP_DET
+5V6
MUTE_HP
M62320FP
AMP_OFF
AMP_MUTE
CD_ON
IIC_DATA1
IIC SHIFT
AMP_RELAY
IIC_CLK1 REGISTER
+AMP
REGULATOR
+5V6 +D2
LM317P
-AMP
REGULATOR
+12V_A +D
LM317P
+12V_D
-33V
FUSE
+D
+D2
FUSE
POWER SUPPLY
4-1
NOTE :
MAIN SIGNAL PATH
MEASUREMENTS ARE IN AUX MODE :
XX mV LEVELS AT MAX VOL
YY dBA S/N AT 500mW Output
ZZ dB HEADROOM (1% THD) WRT TO LEVEL AT MAX VOL
+9V
+12V_A
REG
500mV 2.50V
HEADPHONE
85dBA 85dBA
AMPLIFIER
16dB 3dB
+12V_A
NJM4556AM 1.90V
39R 39R
67dBA
3.0dB
+5V6
ATTEN.
HP_OUT Rin = 3k
MUTE
LEFT/RIGHT
A
AMP_RELAY
+5V_CD AMP_MUTE
A
NTC
FUSE
FUSE
PWDN
F1
F2
LPS
+5V6_ECO
SMPS
Block Diagram_3139 119 37731_dd wk0409
COMBI
+AMP -AMP AMP_OFF
POWER
AMPLIFIER
CLASS D
+12V_A
L/R SPEAKER
2 X 75W
2 X 6 OHMS
TRAFO
L
MAINS
FOR -/21 ONLY
CHOKE
N
VOLTAGE
(NOT USED FOR -/37)
SELECTOR
10M
(ONLY FOR -/37)
LOW_POWER_SUPPLY
LOW_POWER_CONTROL