Sony CD Walkman D-EJ855, Руководство по обслуживанию

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D-EJ855
18 18
• IC Block Diagrams
IC301 TA2152FN (EL)
+ –
24
OUT ADJ
23
BIAS IN
22
RF IN
21
C-AMP SW
20
GND
19
BIAS OUT
18
BEEP IN
17
MUTE SW
16
PW SW
15
MUTE TC
14
VCC1
13
INB
1
NC
2
NC
3
BEEP OUTB
4
OUTB
5
EQB
6
OUTC
7
PW GND
8
EQA
9
OUTA
10
BEEP OUTA
11
VCC2
12
INA
+ –
BIAS
C-AMP SW BEEP PW/MUTE SW
PWA PWC PWB
IC404 TB2127AFN (EL)
+
–
CONTROL
+
–
+
–
+
–
TRIANGULAR
WAVE
GENERATING
INTERFACE
PRE-DRIVER
VC
1 SYNC
2 XBRK
3 FG
4 VC
5 DGND
6 XRST
7 DATA
8 XLAT
9 CLK
10 VDU
11 U
12 PGUV
24 PWM
23 APWM
22 AGND
21 VG
20 COM
19 UI
18 VI
17 WI
16 PGW
15 W
14 VDVW
13 V
5-9. IC PIN FUNCTION DESCRIPTION
•
IC403 TB2130F (FOCUS/TRACKING COIL DRIVER, SLED MOTOR DRIVER, POWER CONTROL)
Pin No. Pin Name I/O Description
1 VREF I Reference voltage input terminal
2 RF41 O Power supply 4 (APC) section operational amplifier 1 output
3 PAPC I Power supply 4 (APC) section operational amplifier 1 non-invert input
4 VINDET I
VIN detection signal input terminal Not used (open)
5
RF4
O Power supply 4 (APC) section operational amplifier 2 output
6 INM4 I Power supply 4 (APC) section operational amplifier 2 invert input
7 APCREF I AGC control pulse signal input from the system controller (IC801)
8 L5 — Connected to the inductor for VG
9 VG O VG output terminal
10 GND —
Ground terminal
11 SYNC I
176.4 kHz clock signal input from the CXD3029R (IC601)
12 WAKE I
Wakeup control signal input from the system controller (IC801) (for system standby reset)
“L”: wakeup The stop status is reset with the falling edge of input signal
13 CLOK I Serial data transfer clock signal input from the system controller (IC801)
14 DATA I Serial data input from the system controller (IC801)
15 LATCH I Serial data latch pulse signal input from the system controller (IC801)
16 RSTB O
System reset signal output to the system controller (IC801) “L”: reset
For several hundreds msec. after the power supply rises, “L” is output, then it changes to “H”
17 FI2 I Sled servo drive signal (+) input from the CXD3029R (IC601)
18 RI2 I Sled servo drive signal (–) input from the CXD3029R (IC601)
19 FI3 I Not used (fixed at “L”)
20 RI3
I Not used (fixed at “L”)
21 FI4 I
Tracking servo drive signal (+) input from the CXD3029R (IC601)
22 RI4 I Tracking servo drive signal (–) input from the CXD3029R (IC601)
23 VD4 I Power supply input terminal for tracking servo drive
24 RO4 O Tracking coil drive signal (–) output
25 MGND4 — Ground terminal (for tracking servo drive)
26 FO4 O
Tracking coil drive signal (+) output
27
VD34 I Power supply input terminal for tracking servo drive
28 RO3 O Not used (open)
29 MGND3 — Ground terminal
30 FO3 O Not used (open)
31
VD23 I Power supply input terminal for sled servo drive
32 RO2 O
Sled motor (M901) drive signal (–) output
33 MGND2 — Ground terminal (for sled servo drive)
34 FO2 O Sled motor (M901) drive signal (+) output
35 VD12 I Power supply input terminal for focus servo drive and sled servo drive
36 RO1 O
Focus coil drive signal (–) output
37 MGND1 —
Ground terminal (for focus servo drive)
38 FO1 O Focus coil drive signal (+) output
39 VD1 I Power supply input terminal for focus servo drive
40 FI2 I Focus servo drive signal (+) input from the CXD3029R (IC601)
41 RI2 I
Focus servo drive signal (–) input from the CXD3029R (IC601)
42
CHGSW O Battery charge control transistor drive signal output
43 RS1 I Battery charge current detection terminal
44 INP1 I
Battery charge circuit error amplifier non-invert input terminal for rechargeable battery
Not used (open)