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BLOCK DIAGRAM
1320
1
KEY_0
KEY_1
+E
VOL_B
+E
+E
+E
+E
JOG_B
VOL_A
+5V6
JOG A
JOG_B
VOL_A
JOG_A
VOL_B
+5V6
LED1
YES
12
VOL
JOG
JOG FRONT
for details see
Chapter 6
1400
1510
1404
5
5
+11V_A
+11V_A
MIC
MIC
MIC
MIC_DET
MIC_DET
1
1
MICROPHONE BOARD
for details see
Chapter 6
TUNER BOARD
1120
1120
for details see
1
1
TU_LEFT
TU_LEFT
Chapter 7
TU_RIGHT
TU_RIGHT
+11V_A
+11V_A
TU_ENAB
TU_ENAB
TU_DATA
TU_DATA
TU_CLK
TU_CLK
8
8
TU_STEREO
TU_STEREO
1501
AUX IN
1504
LINE OUT
1
9
CD - CHANGER MODULE
for details see
Chapter 10
5-1
1222
12
KEY_0
KEY_1
+E
VOL_B
JOG_B
Display
driver
VOL_A
7002
JOG_A
+5V6
1
LED1
Microprocessor
7001
I2C BUS
CDR CONTROL
TUNER CONTROL
INTERFACE
INTERFACE
1224
1226
1
11
1
1402
1
11
ALC
CONTROL
BASS
ALC
L&R
7501
Source Selector & Soundprocessor
Microphone
SOURCE
VOLUME I
SOUND
SELECTOR
Tuner
not used
CDR(CD)
AUX
2
I
C Control
3CDC CONTROL
AF 9 BOARD
for details see
Chapter 8
1525
9
1007
1
1805
1
1802
1205
8
8
EBU
EBU IN CD10
PORE
RESET CD10
CONTROL INTERFACE
SILD
CD10 SILD
RAB
CD10 RAB
SICL
CD10 SCL
CDR MODULE
SDA
CD10 SDA
for details see
Chapter 11
1
1
DISPLAY FRONT
for details see
Chapter 6
1220
1600
1
5
+5V6
LED3
LED4
5
1
1221
1502
1
4
KEY2
4
1
3CDC CONTROL
INTERFACE
1225
16
1
1405
1
16
HP_LEFT
HP_RIGHT
HP_DET
Low_Power_Supply
+12V_A
IS
+12V_D
VOLUME II
FADER
AF_right
IS
Low_Power_Control
7403
PowerDown
2
I
C
I2C BUS
Clipping
Control
AMP ON
D7
D6
11
D5
D4
D3
Ampl_CS_DC
D2
6
D1
VCD/CDR_ON
D0
SHIFT REGISTER
1532
7
1
1532
1214
1
7
1
6
1203
SUPPLY INTERFACE
1
not connected
not connected
1803
1
EBU IN
AUDIO SIGNAL INTERFACE
5
3
5-1
Power ON:
+5V6
+5V6
F
B
RONT
OARD
Standby Key 1214 → Line KEY2 → Microprocessor 7001.
Microprocessor 7001 sends an I
RED
BLUE
+5V6
7403 on
AF9 B
OARD
LED3
LED BOARD
D5 (7403/11) = AMP_ON is set to high level.
for details see
Line AMP_ON is connected to the
LED4
Chapter 6
P
B
OWER
OARD
If AMP_ON is high → power amplifiers 7301 and 7302 are
switched on.
CDR ON:
KEY2
F
B
RONT
OARD
CDR Key 1002 → Line KEY2 → Microprocessor 7001.
Microprocessor 7001 sends an I
KEY BOARD
7403 on
for details see
AF9 B
OARD
Chapter 6
D1 (7403/6) = VCD/CDR_ON is set to high level.
Line VCD/CDR_ON is connected to the
P
B
OWER
OARD
On the Power Board the line is called VCD_ON.
If this line is high → +5V_VCD and +12V_CDR are switched
on.
gets supply voltages via 1312 → 1214.
CDR M
ODULE
HEADPHONE BOARD
for details see
Chapter 6
1603
1700
HP_LEFT
1
4
Headphone
HP_RIGHT
4
1
HP_DET
1204
1310
-Vkk
1
1
Low_Power_Supply
F1
+12V_A
F2
PowerDown
+12V_D
NTC
ECO
+5V6
+5V6
Low_Power_Supply
7
7
A1
A1
1304
1209
1
1
AF_left
AF_left
B1
AF_right
C1
NTC
NTC
Low_Power_Control
PowerDown
Clipping
AMP ON
-Vkk
-Vkk
CLASS G Switch
F1
F1
F2
F2
7301
NC
POWER
VCD/CDR_ON
13
AMP
13
1312
7302
6
+12V_CDR
POWER MODULE
(Amplifier part)
+5V_VCD
for details see
+5V_VCD
1
Chapter 9
DIG IN
2
C command to Shiftregister
2
C command to Shiftregister
POWER MODULE
(Supply part)
for details see
Chapter 9
1304
1209
1
1
-Vkk
F1
F2
PowerDown
NTC
ECO
Low_Power_Supply
7
7
1302
1203
1
1
A1
A1
B1
C1
6
6
Block Diagram FW-R55 17 09 2001
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