Sony WX-4500X Service Manual ▷ View online
21
WX-4500X
-MAIN BOARD-
(SIDE B)
(SIDE B)
TP-R TP-L
Dolby level adjustment
-MAIN BOARD-
(SIDE A)
(SIDE A)
Dolby level adjustment
(R-CH)
Dolby level adjustment
(L-CH)
DOLBY Level Adjustment
Setting :
Light down mark ;
(DOLBY OFF)
Light down mark ;
(DOLBY OFF)
Procedure :
1. Set the FWD play mode.
2. Push the MENU button and rotate the jog roller to display “NR”.
1. Set the FWD play mode.
2. Push the MENU button and rotate the jog roller to display “NR”.
Then press “ — ” on the SEEK/AMS button to select “NR off”.
(Dolby off)
(Dolby off)
3. Adjust RV400 for L-ch and RV401 for R-ch so that the level
meter reads –6 ±0.5 dB (0.37 to 0.41 V).
Adjustment Location :
main board
TP-L
TP-R
TP-L
TP-R
test tape
P-4-D400
(400 Hz, 0 dB)
P-4-D400
(400 Hz, 0 dB)
level meter
set
22
WX-4500X
• IC103 µPD780058GC-259-8BT (CD MECHANISM CONTROLLER)
Pin No.
Pin Name
I/O
Pin Description
1
RST
O
Reset signal output to the MN6627481RPMFA (IC101) “L” : Reset
2, 3
—
O
Not used in this set (open)
4
AVSS
—
Ground pin (for A/D converter)
5
—
O
Not used in this set (open)
6
J/E, CE
I
Destination initial setting pin Fixed at “H” in this set
7
A VREF1
I
Reference voltage (+5 V) input (for D/A converter)
8
SUBQ
I
Sub code Q data input from the MN6627481RPMFA (IC101)
9
—
O
Not used in this set (open)
10
SQCK
O
Clock signal output for sub code Q data write to the MN6627481RPMFA (IC101)
11
STAT
I
Internal status signal input from the MN6627481RPMFA (IC101)
12
FL-M- > F
O
Data write signal to external flash memory Not used in this set (open)
13
MCLK/FL-CLK
O
Clock signal output for command data from the MN6627481RPMFA (IC101)
14, 15
—
O
Not used in this set (open)
16
BUS SI
I
Serial data input from SONY bus interface (IC750)
17
BUS SO
O
Serial data output to SONY bus interface (IC750)
18
BUS CLK
I/O
Serial clock signal input/output for bus interface to the master controller (IC700) and
the display controller (IC900), or serial clock signal output to the SONY bus
interface (IC750)
19
—
I
Through pin of serial clock signal for the bus interface
Connect to the BUS CLK (pin qk)
20
TLOCK
I
Tracking servo pull-in signal input from the MN6627481RPMFA (IC101) “L” : Active
21
FLOCK
I
Focus servo pull-in signal input from the MN6627481RPMFA (IC101) “L” : Active
22
SENCE
I
Internal status (SENSE) input from the MN6627481RPMFA (IC101)
23
—
I
Through pin of serial clock signal for the bus interface
Connect to the BUS CLK (pin qk)
24
—
O
Through pin of bus serial data out Connect to the BUS SO (pin qj)
25, 26
—
I
Through pin of bus serial data in Connect to the BUS SI (pin qh)
27
MLD
O
Command road signal output from the MN6627481RPMFA (IC101)
28
MDATA
O
Command data signal output from the MN6627481RPMFA (IC101)
29
LINK OFF
O
Link on/off control signal output for SONY bus interface
“L” : Link off, “H” : Link on Not used in this set
30
A MUTE
O
Audio line mute control signal output “H” : mute on
31
MECHA ON
O
Power on/off control signal output of CD mechanism deck block “H” : Power on
32
—
I
Through pin of power supply Connect to the VDD (pins yk, uf)
33
VSS
—
Ground pin
34
—
I
Through pin of battery down voltage detection signal
35
CD ON
O
Power on/off control signal output of CD mechanism deck block
36 – 38
—
O
Not used in this set (open)
39
—
I
Through pin of bus on/off control signal
40
—
O
Not used in this set (open)
41
—
I
Test signal input of auto adjustment
42
SER OK
O
Effect discrimination out of auto adjustment “H” : OK
43
SER NG
O
Effect discrimination out of auto adjustment “H” : NG
44 – 51
—
O
Not used in this set (open)
52
TEXT
I
Initial setting input used to with/without the CD text decording function
“L” : without, “H” : with
53
SERCHK
O
Not used in this set (open)
54
P TEST
O
Not used in this set (open)
55
LIMSW
I
CD sled limit in detection switch input
“L” signal is input when the optical pick-up comes on the innermost perimeter
56, 57
—
O
Not used in this set (open)
SECTION 6
DIAGRAMS
6-1. IC PIN DESCRIPTIONS
23
WX-4500X
*1 CD loading motor (M903) control
Operation
STOP
LOADING
EJECT
BRAKE
Pin
FOUT (Pin uj)
“L”
“H”
“L”
“H”
ROUT (Pin uh)
“L”
“L”
“H”
“H”
Pin No.
Pin Name
I/O
Pin Description
58
SW3
I
CD loading detection switch input
“L” signal is input during CD disc loading and ejecting operations
59
SW4
I
CD disc detection switch input
“L” signal is input when CD disc catching is completed
60
SYS RESET
I
System reset signal input from the master controller (IC700) and the reset signal
oscillator (IC701) “L” : Reset
“L” signal is input for several hundreds of microseconds after the power is turned on,
the signal then turns “H”.
61
—
O
Not used in this set (open)
62
BUS ON
I
BUS on/off control signal input from the master controller (IC700) “L” : Bus on
63
SW2
I
CD disc detection switch input
“L” signal is input when a disc is present at the CD disc inlet
64
B/U CHECK
I
Down voltage detection input from the SONY bus interface (IC750) and the battery
detection circuit “L” signal is input when the voltage is reduced
65
BLKCK
I
Clock signal input for sub code interrupt from the MN6627481RPMFA (IC101)
66
—
O
Not used in this set (open)
67
VSS0
—
Ground pin
68
VDD
—
Power supply pin (+5 V)
69
X2
—
Main system clock connect pin (5 MHz)
70
X1
—
Main system clock connect pin (5 MHz)
71
VPP
—
Fixed at “L” in this set
72
—
—
Sub System clock connect pin Not used in this set (open)
73
XT1
—
Sub System clock connect pin Not used in this set (Fixed at “H”)
74
VDD
—
Power supply pin (+5 V)
75
A VREF0
I
Reference voltage input (for A/D converter) Fixed at “L” in this set
76
ROUT
O
CD loading motor (M903) control signal (direction of eject) output to the
BA5984FP (IC201) of CD mechanism deck block “H” : Active
*1
77
FOUT
O
CD loading motor (M903) control signal (direction of loading) output to the
BA5984FP (IC201) of CD mechanism deck block “H” : Active
*1
78, 79
—
—
Not used in this set (open)
80
GCTL
O
FE, TE gain control signal output
24
WX-4500X
• IC700 MB90574CPMT-G-356-BNDDE1 (MAIN SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
TU ON
O
Tuner on signal output
2
DOLON
I/O
Dolby control signal output (“H” : dolby on)/dolby function corresponding
detection signal input (“L” : dolby function corresponding)
3 – 6
N. C. O
O
Not used in this set (open)
7
BUS ON
O
Bus on control signal output
8
VCC
—
Power supply pin (+5 V)
9
FLASH WR
I
Flash write mode detection signal input “L” : Flash write mode
10
EEDATA
I/O
EEPROM data signal input/output
11
EECLK
O
EEPROM clock signal output
12
RXD
I
Flash write data signal input
13
TXD
O
Flash write data signal output
14
N. C. O
O
Not used in this set (open)
15
BEEP
O
BEEP signal output
16
DPBOOT
O
Display microcomputer write control signal output
17 – 19
N. C. O
O
Not used in this set (open)
20
UNI SI
I
SONY bus data input
21
UNI SO
O
SONY bus data output
22
UNI CLK
O
SONY bus clock output
23
N. C. O
O
Not used in this set (open)
24
SIRCS
I
Remote control data signal input
25 – 28
POS0 – 3
I
Position signal detection input
29
REEL1
I
Reel stand rotation detection signal input
30
LM EJ
O
Tape mechanism loading motor control signal output (eject direction)
31
LM LOD
O
Tape mechanism loading motor control signal output (loading direction)
32
TP ON
O
Tape power control signal output
33
VSS
—
Ground pin
34
C
—
Capacitance pin of power stabilized
35
AD ON
O
Power control signal output of A/D conversion
36
N. C. O
O
Not used in this set (open)
37
CM-ON
O
Capstan motor control signal output
38
DVCC
—
D/A converter VREF input
39
DVSS
—
D/A converter ground pin
40, 41
N. C. O
O
Not used in this set (open)
42
AVCC
—
Analog power supply pin
43
A VRH
—
A/D converter VREF+ input
44
A VRL
—
A/D converter VREF– input
45
AVSS
—
Analog ground pin
46
KEY IN0
I
Key 0 signal input
47
KEY IN1
I
Key 1 signal input
48
DESTSEL0
I
Destination initial setting pin (Fixed at “H” in this set)
49
RC IN0
I
Rotary commander signal input
50
QUALITY
I
Tuner noise detection signal input Not used in this set (open)
51
FM AGC
I
FM AGC detection signal input
52
MPT
I
Tuner multi pass signal input Not used in this set (open)
53
VSM
I
S meter voltage signal input
54
VCC
—
Power supply pin (+5 V)
55, 56
N. C. O
—
Not used in this set (open)
57
E VOL MUTE
O
Electronic volume mute signal output “L” : mute on
58
AMP MUTE
O
Amplifier mute signal output
59
MUTE
O
System mute control signal output
60
AMP ON
O
Amplifier on signal output “L” : off/ “H” : on
61
SA LAT
O
Serial data lutch pulse output for spectrum analyzer
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