Diagrams; Block Diagram - Sony Walkman WM-FX571 Service Manual

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM

L1
FM IF
FM/AM RF,IF AMP
FM FRONT END
IC7
IC3 L1 Q4 Q6
CF1 CF2
FM IF 10.7MHz FM IF 10.7MHz
1 RF IN MIX 6 FM IF IN L OUT 14
3
AMP AMP
Q1
L2
R OUT 15 R CH
FM
FM PRESCALER T2
LOCAL/DX L2 VOLTAGE IC2 AM MIX
CF3
450kHz 450kHz
OSC 5 2 FM IN AM IF IN QUAD 7
6
CF4
D2 FM OUT 5
10.7MHz
7 PSC
RF OUT 8 MIX OUT
4
L4
D1 VCO 17
AM RV1
D3 FERRITE-ROD
FM VCO
Q7
ANTENNA
RF Q8 Q8
CT1 24 AM RF
AMP LP2A 18
Q2
AM
T1
LOCAL/DX LP2B 19
AM OSC
Q16,17
D4
L.P.F 2 AM OSC VCC 5
CT1, L4
AM Q15
RADIO +B
TRACKING 2.8V
SWITCH
IF REQ
IF REQ
11
SWITCH
LPF1 16
Q14
IF OUT 10
Q13
S702
(F/R)
FWD
STOP
REV
65 36 66 68 70 71 32 64
COM1 COM3 S1 S22
1 3 4 25 75 74 52
04
X701
75kHz
MOTOR SERVO
LIQUID CRYSTAL BRAKE
IC601
SWITCH
DISPLAY PANEL
Q601,602
• R-CH is omitted.
LCD1 START 8
• Signal Path
19 U
: FM DIR 6
M901
CAPSTAN/
: AM 1 V
REEL
MOTOR
: PB IN 10
3 W
VCC1
– 9 –
AUDIO
POWER AMP
IC301
PWR
18 16 3 57
VOLUME
FWD Q302 AVLS 63
RV301
Q303
FWD
L 34 PW C 56
HP301
AVLS
Q301 64 AVLS AGC 50
PB HEAD CONT
(1/2)
REV DET DET Q306
25
L 33 REV 58 PW SW
59 MUTE SW
60 BEEP
51 RF OUT PRE SW
52 BASS 22
53 PW VCC
F/R SW
26
Q5
Q301
19 NR SW
(2/2)
BAND
62 BST SW BST IN BST IN 47
SELECT
Q18
AMS
RADIO +B
VCC1
SWITCH
24
Q304
Q7
VCC2
Q21
62 28 54 30 60 31 57 40 55 56 29 49 59 34
33
SYSTEM CONTROL
IC1
50 51 39 38 47 48 46 45
VCC2
3 4 2 1
EEPROM
D5
IC4
PH701 PH701 BATT
RV601
Q704
TAPE
SPEED
– 10 –
6-2. IC PIN DESCRIPTION
• IC1 TC9326F-051 (SYSTEM CONTROL)
Pin No. Function Pin Name I/O Circuit
1 to 3 COM 1 to 3 COM 1 to 3 —
VCC
VCC1
DATA 4 to 25 S1 to 22 S1 to 22 —
REMO
GND GND 26 R DATA OUT P13-1 O
COM
J701
L CH
REMOTE 27 DDC1 CTL P13-2 O Output (Nch)
R CH
28 BAND AM/FM P13-3 O Output (Nch)
29 MUTE CTL P14-0 O Output (Nch)
30 F/R CTL P14-1 O Output (Nch)
31 BST CTL P14-2 O Output (Nch)
32 IF REQ P14-3 O Output (Nch)
33 HOLD SW IN2 I
S901
34 R DATA IN K0 I
(ATS)
35 HOLDER, TUME K1 I
36 F/R SW K2 I
Q701,702
37 HOLD SENS K3 I
PLUNGER PM901
DRIVE PLUNGER
38 PHOTO CTL P1-1 O Input/Output
39 PHOTO IN P1-2 I Input/Output
40 AMS CTL P1-3 O Input/Output
41 AMS IN P2-0/AD IN1 I Input/Output
42 BATT DET P2-1/AD IN2 I Input/Output
43 KEY IN P2-2 I Input/Output
44 AD Vref P2-3 I Input/Output
S1-5,7-11 45 LED CTL P3-0 O Input/Output
FUNCTION
KEY 46 CS P3-1 O Input/Output
IC6 47 M DATA I/O P3-2 I/O Input/Output
ON S701
48 M CLOCK P3-3/BUZR O Input/Output
HOLD
OFF
49 BEEP P4-0 O Input/Output
50 MOTOR CTL P4-1 O Input/Output
S703
(HOLDER)
51 MOTOR DIR P4-1 O Input/Output
26 43 58 67 37 41 35 52 MOTOR BRK P4-2 O Input/Output
53 REC CTL P4-3 O Input/Output
54 RADIO CTL P5-0 O Input/Output
55 AVLS CTL P5-1 O Input/Output
56 AMP CTL P5-2 O Input/Output
57 GRV/MB CTL P5-3 O Input/Output
58 PM CTL P6-0 O Ternary output
61 44 27
DRY BATTERY 59 PRE AMP CTL P6-1 O Ternary output
SIZE "AA"
(IEC DESIGNATION R6)
1PC, 1.5V 60 DOLBY CTL P6-2 O Ternary output
VCC1
61 DDC2 CTL P6-3 O Ternary output
T3,Q9-11
DC-DC
J801
VCC2 62 MONO/ST MUTE O
CONV.
DC IN 1.5V
63 TEST TEST —
64 IF IN IF IN I
IC701
REG
2 3 DDC
IC5 2 5 65 LOCAL/DX DO1/OT O
CONT
1
66 DO DO2 O
67 HOLD HOLD I External interrupt
68 PSC PSC O
69 GND GND —
INT ACT Description Remarks Pin No. Function
— — Common terminal. 70 FM IN
— — Segment output terminal. 71 AM IN
Output H — Remote control data output. VLD at High level. 72 VDD
Pull-up at outside 73 RESET
Hi-imp L DDC control terminal (when DDC ON = L).
(TUNER side).
74 XOUT
Hi-imp — BAND control output (when AM = Hi-imp, when FM = L). Pull-up at outside (Vref).
75 XIN
Hi-imp L MUTE control terminal (when MUTE ON = L). Pull-up at outside (Vcc).
76 VXT
Hi-imp — HEAD select terminal (when FWD = Hi-imp, when REV = L). Pull-up at outside (Vcc).
L Hi-imp Tone control terminal (when BOOST ON = Hi-imp, when OFF = L). Pull-up at outside (Vcc). 77 VLCD
Hi-imp L IF REQ control terminal (when REQ = Hi-imp). Pull-up at outside (Vref). 78
Input — — HOLDER detect input (when HOLDER CLOSE = H). Pull-up at outside (V ). 79
LCD
Input L VCC Communication request from the remote controller. (H = VCC). A/D input. 80 VEE
Input — — HOLDER detect and TAPE error erase detect terminal. A/D input.
Input — — TAPE rotating direction detect terminal. A/D input.
Input L AD Vrcl Input when the key is pressed during HOLD (H = AD Vref). A/D input.
L H Terminal for controlling the rotation detect circuit.
— — Rotation detect input. Pull-down at outside.
L H AMS sensitivity select (when AMS = H, when BL.SKIP = L).
Tape sound existing or not-exiting detect (Music
— — Pull-up at outside.
exists: L, music does not exist: H.
— — Voltage detect input.
H — KEY input terminal.
— — Reference voltage of AD IN 1, 2.
L H LED output terminal.
L — E 2 PROM CS control terminal.
L — E 2 PROM DATA I/O.
L — E 2 PROM CLOCK terminal.
— — BEEP (when TC : 1.6 kHz, when CF : 3.0 kHz).
L H MOTOR control terminal.
L H MOTOR control terminal.
L H MOTOR control terminal.
L H REC circuit control output.
H L RADIO system control terminal (when RADIO ON = L).
L L Terminal for controlling AVLS (when ON = L).
L H AMP control output (when AMP ON = H).
L H Tone control terminal (when GRV = L, when MB = H).
L H PL control terminal.
Hi-imp Hi-imp TC/CF select output (when PRE OFF = H, when PRE ON = Hi-imp).
Terminal for controlling DOLBY circuit
Hi-imp Hi-imp
(when OFF = H, when ON = Hi-imp).
Hi-imp Hi-imp DDC control terminal (ON at Hi-imp, OFF at L).
Output L — TUNER MONO/STEREO select terminal (MONO at H).
— — TEST terminal (Normal operation at L or NC). Open
— — IF input.
Output L — TUNER sensitivity select terminal (LOCAL at H, DX at L).
— — Phase comparator output.
H — External interrupt terminal.
— H Pre-scaler output (FM at H).
— — Power supply GND terminal.
– 11 –
WM-FX571
Pin Name I/O Circuit INT ACT Description Remarks
FM IN I — — Pre-scaler input.
AM IN O — — AM local oscillator output.
VDD — — — Power supply voltage.
RESET I L H RESET terminal (H during operation).
XOUT O — — Terminal to which external oscillator is connected.
XIN I — — Terminal to which external oscillator is connected.
Terminal to which external capacitor is connected
VXT — — —
to stabilize crystal oscillator power supply.
VLCD — — — Terminal to step-up power supply voltage for LCD drive.
C1 C1 — — — Terminal to step-up power supply voltage for LCD drive.
C2 C2 — — — Terminal to step-up power supply voltage for LCD drive.
VEE — — — Terminal for 1.5 V constant voltage power supply of LCD drive.
– 12 –