Blockdiagram - Philips AZ7261 Service Manual

BLOCKDIAGRAM

DISC
TURNTABLE
MOTOR
9 7
TRACK
SERVO
6
FOCUS
SERVO
8
SLIDE
SERVO
Laser
diode
Monitor
diode
Inner switch
pick up
unit
PHOTO DIODE
ARRAY
D1 D2
R1 R2 FLEX PCB
CD-drive D3
CDM 12.3
BLC
+1.2
FLEX PCB
eye-pattern signal
during focus search
> 800 mVpp
2,5V
1 6
0
TB=0.1s
-2,5V
TB=0.5µs
3-1
+µP
P TMP47C823F
RESET
IR-RECEIVER
RESET
(not on all versions)
4MHz
RC5-in
KEYBOARD
RC
CORD-RC
CIRCUIT
+3.5
(not on all versions)
LASER
SUPPLY
HF-PREAMPLIFIER
1
HFIN
+
R1 R1
L.P.F.
R2 R2
L.P.F.
D1 D1
L.P.F.
D2 D2
L.P.F.
D3 D3
L.P.F.
D4
L.P.F.
SAA7372
CD7
+1.8 +S A + +3.5
POWER
Power DC/DC FEED-
switch CONVERTER BACK
+A CLsaw
13
Reg.
H-BRIDGE
DM_IN
MOTOR DRIVER 2
L.P.F.
+A CLsaw
Ref.
H-BRIDGE
SLIDE_IN SL (PWM signal)
MOTOR DRIVER 4
L.P.F.
CLsaw
+A CLsaw
SAWTOOTH
H-BRIDGE FOCUS_IN FO
(PWM signal)
OSCILLATOR
MOTOR DRIVER 1
L.P.F.
DM±
Sldm±
+A CLsaw
Focus±
H-BRIDGE TRACK_IN RA
Track± (PWM signal)
MOTOR DRIVER 3
L.P.F.
+A CLsaw
MPC1718
SERVO DRIVER
servo in or disc motor cw 10
7
3V
not moving 11
8
0
12
servo out or disc motor ccw
9
-3V
13
DISPLAY ILLUMINATION
LCD
RAM LCD DRIVER ROM
CLOCK GEN. 12bit TIMER
ALU
& TIMING COUNTER
I/O PORTS
from/to SUPPLY/CHARGE CIRCUIT
8.46MHz
DOBM MOTO1 16.9MHz
LDON
EBU
FRONT END TIMING
INTERFACE
ERROR MOTOR SUBCODE
DIGITAL PLL
CORRECT. CONTROL PROCESS.
EFM RAM PEAK
SRAM
DEMOD. ADDRESS. DET.
µP
CONTROL PART
INTERFACE
SCLK SCLK
FUNCTION AUDIO SERIAL WCLK WCLK
PRE-PROC.
CONTROL PROCESS. INTERFACE DATA DATA
OUTPUT VERSATILE
KILL
STAGES INTERFACE
SL FO RA
MOTO1
(from CD7)
SUPPLY/CHARGE CIRCUIT
12
+5
10
DC-in socket
+
11
DC_ON
(to µP)
CD7 → DAC
2
SCLK
servo out or disc motor cw
3V
not moving (f=530kHz) 3
WCLK
servo in or disc motor ccw
4
DATA
0
3-1
FREQUENCY RIGHT CH.
LOR
DIVIDER REGISTER
IREF
Vref
11k
CONTROL LEFT CH. LOL
& TIMING REGISTER
TDA1545A
CONT. CALIBRATION DAC
MUTE
(from µP)
+A
from DC/DC CONV.
OVERVOLTAGE BATT+
+3.5 +1.2 +S
PROTECTION
ACCU_IN
BATT. LEVEL
BATT_LEV
ACCU or
to µP
& TEMP.
BATTERY BATT_LEV_SW
CHARGE DETECTION
T_ACCU
CONTROL
BATT-
CHG_ON
(from µP)
TRANSFER OF AUDIO SAMPLES VIA SERIAL INTERFACE OF CD7
left channel right channel
CD OUT
(not on all versions)
+3.5
HEADPHONE&
RC-SOCKET
VOLUME
CONTROL
RIGHT
DBB
LEFT
DBB
DBB RC
(from µP)
(from CORD-RC CIRCUIT)
CS 46 172