Sony ICF-CD73W Service Manual ▷ View online
ICF-CD73W
13
CD-JUMP TEST MODE
Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on the CD
Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on the CD
board.
Connecting Location: CD board (See page 15)
2. Connect 47 kW and 100 kW resistors in parallel to the end of
S501 on the LCD board, and further connect 100 kW and 220
kW resistors respectively and short them to the GND, and the
CD-JUMP TEST MODE will be activated.
kW resistors respectively and short them to the GND, and the
CD-JUMP TEST MODE will be activated.
3. Insert a CD disc.
4. Turn the power on. Press the [CD
4. Turn the power on. Press the [CD
u
] button.
LCD display
CD
TRACK
5 . If the [MODE] button is pressed, you can jump in fast feed or
fast reverse direction with the [+
>
] or [–
.
].button by the
jump amount set in Table 1.
Table 1
LCD
Button
+
>
–
.
REP ALL
TRACK + 1
TRACK - 1
SHUFFLE
TRACK + 10
TRACK - 10
SHUFFLE, REP
TRACK + 100
TRACK - 100
Waveform of TP (TE) and TP (VC) output in each mode is as fol-
lows.
lows.
REP ALL mode
500 μs/div
500 μs/div
SHUFFLE mode
1 ms/div
1 ms/div
SHUFFLE REP mode
10 ms/div
10 ms/div
6. Turn the power off to release the CD-JUMP TEST MODE.
ICF-CD73W
14
SECTION 5
ELECTRICAL ADJUSTMENT
[AM]
Setting:
Function: RADIO
Band: AM
Setting:
Function: RADIO
Band: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
+
–
level meter
set
3.2
Ω
JACK board
CNP304 pin
JACK board
CNP304 pin
[FM/TV/WEATHER]
Setting:
Function: RADIO
Band: FM/WEATHER
Setting:
Function: RADIO
Band: FM/WEATHER
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
level meter
JACK board
CNP304 pin
JACK board
CNP304 pin
set
3.2
Ω
0.01 F
TUNER board
TP (GND)
TUNER board
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
TUNER board
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be fi nally done by the trimmer
capacitors.
capacitors.
• Remove FM/WEATHER antenna in FM/WEATHER adjust-
ment.
TUNER SECTION
0 dB = 0.775V
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L6
530 kHz
1.0 ± 0.1 V
Confi rmation
1,710 kHz
5.2 ± 0.8 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L5
580 kHz
CT5
1,490 kHz
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
10.7 MHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L4
87.5 MHz
2.7 ± 0.3 V
CT3
108 MHz
4.5 ± 0.3 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
87.5 MHz
Confi rmation
108 MHz
WEATHER (1 – 7 CH) VCO VOLTAGE ADJUSTMENT
Adjustment Part Frequency Display Reading on Digital Voltmeter
L3
WEATHER 2 ch
1.2 ± 0.3 V
CT4
WEATHER 1 ch
1.21 ± 0.3 V
WEATHER (1 – 7 CH) TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
WEATHER 2 ch
CT2
WEATHER 1 ch
Adjustment and Connecting Location: TUNER board
(See page 15)
ICF-CD73W
ICF-CD73W
15
15
Perform all CD section check in the test mode.
FOCUS BIAS CHECK
Procedure:
1. Connect the oscilloscope to TP (RF) and TP (VC) on the CD
Procedure:
1. Connect the oscilloscope to TP (RF) and TP (VC) on the CD
board.
2. Set the CD test mode. (Refer to CD TEST MODE (See page
11))
3. Insert the test disc (YEDS-18). (Part No. 3-702-101-01) (CD)
4. Press the [CD
4. Press the [CD
u
] button. (LPC ON)
5. Confi rm that the oscilloscope waveform is as shown in the
fi gure below. (eye pattern)
A good eye pattern means that the diamond shape (
◊ in the
center of the waveform can be clearly distinguished.
6. Press the [CD
u
]button. (LPC OFF)
7. Perform
confi rmation in the same manner as step 5.
8. Press the [OFF
x
] button.
9. Change the test disc (TCD-W082L). (Part No. J-2502-063-2)
(CD-RW)
10. Perform confi rmation in the same manner as step 4 to 7.
• RF signal reference waveform (eye pattern)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
CD:
1.1 ± 0.2 Vp-p (LPC ON)
1.1 ± 0.3 Vp-p (LPC OFF)
CD-RW:
1.0 ± 0.2 Vp-p (LPC ON)
0.9 ± 0.3 Vp-p (LPC OFF)
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
Connecting Location:
TP
(VC)
TP
(RF)
IC702
IC701
– CD BOARD (Conductor Side) –
TP
(TE)
CD SECTION
Adjustment and Connecting Location:
– TUNER BOARD (Component Side) –
T2
IF Adjustment
T1
IF Adjustment
L6
AM VCO Voltage Adjustment
L2
CT1
CT2
L1
FM Tracking Adjustment
AM Tracking Adjustment
L3
CT4
L4
CT3
L5
CT5
WEATHER (1 – 7 CH)
Tracking Adjustment
Tracking Adjustment
WEATHER (1 – 7 CH)
VCO Voltage Adjustment
VCO Voltage Adjustment
FM
VCO Voltage Adjustment
VCO Voltage Adjustment
– TUNER BOARD (Conductor Side) –
TP
(GND)
TP
(VT)
TP
(ANT)
ICF-CD73W
ICF-CD73W
16
16
SECTION 6
DIAGRAMS
A
B
D
F
E
C
I-V AMP
DETECTOR
19
20
17
18
22
SL+
SL–
FCS–
FCS+
TRK+
TRK–
SPINDLE
MOTOR DRIVE
M702
(SPINDLE)
SLED
MOTOR DRIVE
23
M701
(SLED)
FOCUS
COIL DRIVE
TRACKING
COIL DRIVE
SP+
SP–
7
8
9
10
FCS IN
TRK IN
SL IN
SP IN
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE,
POWER CONTROL
IC702
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-900AAA)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
25
24
REGB
M
M
4
MUTE34
AUTOMATIC
POWER
CONTROL
Q701
8
FIN2 (PD1)
7
FIN1 (PD2)
+
MIX
4
RF
LPF
EQ
PH
BH
10
TIN2 (F)
9
TIN1 (E)
A/D
SW
LPF
TRACK
JUMP
TBAL
80
LDD
APC
AUDIO
ADJUST
SERVO
PROCESSOR
RUPTURE
DETECT
79
LDS
SW
AGC
D/A
13
FE
15
TE
20
TDO
21
FDO
23
SLDO
22
SPDO
S/H
3
EFMIN
SLISE LEVEL
CONTROL
ERROR
CORRECTION
AUDIO CD
RAM
8FS
DIGITAL
FILTER
INTERPOLATION
MUTE
ATTENUATION
DEEMPHASIS
1 BIT
DAC
42
LCHO
RCHO
LPF
DOUT
AUDIO
OUT
FSEQ
PLL
VCEC
CLV, CAV
CONTROL
FRAME SYNC
DETECT,
PROTECT, INSERT,
EFM DECODE
31
RAM
DRF
67
25
CONT4
72
CONT1
66
RES
65
WRQ
61
CE
62
CL
63
DI
64
DO
RF AMP, FOCUS/TRACKING SERVO,
DIGITAL SIGNAL PROCESSOR, CLV SERVO,
DIGITAL FILTER, D/A CONVERTER
IC701
53 CD DATA IN
54 CD DATA
55 CD CLK
56 CD CE
50 WRQ
58 XRST
57 DRF
39 FSEQ
59 CD ON
61
CD OPEN
S551
(CD LID OPEN/CLOSE)
A
SYSTEM
CONTROLLER
IC401
(1/2)
R-CH
GENERAL PURPOSE
PORTS
COMMAND
INTERFACE
DRF
5
MUTE1
XOUT
XIN
X701
16.9344MHz
CD LCH
PD1
PD2
F
E
LO LD
LO PD
TRK +
TRK –
FCS +
FCS –
When the optical pick-up
is inner position
is inner position
ON :
S701
(LIMIT)
45
39
CLOCK
GENERATOR
48
49
• SIGNAL PATH
: CD PLAY
• R-ch is omitted due to same as L-ch.
MUTING
SWITCH
SWITCH
Q702
DC IN
CD ON
SWITCH
Q703, 704
REGULATOR
30
+3.3V
REGULATOR
Q705
CD +3.3V
PVCC
31
6-1. BLOCK DIAGRAM - CD Section -
(Page 18)
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