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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
+12V_A
+12V_D
+C
+5V6
-33V
+5V6_ECO
+C
IR EYE
F1x
FTD
F2x
BASS & TREBLE
VOLUME
+D
CONTROL
CONTROL
+D
F1x
F1
F2x
F2
-33V
FRONT
+9.1V
+9.1V
TDA7468
INCREDIBLE
TREBLE
LEFT/RIGHT
VOL. 1
&
VOL. 2
SURROUND
BASS
INTERFACE
500mV
A
D
SIMPLE
HP_MUTE
IS FILTER
HP_DET
+5V6
MUTE_HP
M62320FP
AMP_ON
AMP_MUTE
CD_ON
IIC_DATA1
IIC SHIFT
IIC CLK1
REGISTER
REGULATOR
+5V6
A2
7805
B1
A1
A1
REGULATOR / STABILISER
PWDN
B
-33V
4-1
NOTE :
MAIN SIGNAL PATH
MEASUREMENTS ARE IN AUX MODE :
XX mV
LEVELS AT MAX VOL
YY dBA
S/N AT 500mW
ZZ dB
HEADROOM (1% THD) WRT TO LEVEL AT MAX VOL
+9V
+12V_A
REG
FOR CLASS G SWITCH
B
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
+5V_CD
AMP_MUTE
A
FUSE
FUSE
FUSE
A2
FUSE
NTC
F1
F2
LPS
POWER SUPPLY
+5V6_ECO
SMPS
Block Diagram_3139 119 37751_dd wk0409
+50V
C1
B1
A1
AMP_ON
POWER
AMPLIFIER
AN7591
+
-
+
-
L/R SPEAKER
2 X 40W
2 X 6 OHMS
COMBI
TRAFO
L
MAINS
FOR -/21 ONLY
CHOKE
N
VOLTAGE
(NOT USED FOR -/37)
SELECTOR
10M
(ONLY FOR -/37)
A2
LOW_POWER_CONTROL
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