Sony ICF-CDK50 Service Manual ▷ View online
ICF-CDK50
9
3-7. CD BLOCK
3-8. OPTICAL PICK-UP BLOCK (KSM-213CCP)
insulator
CD block
insulator
two floating screws
(PTPWH
(PTPWH
M2.6)
floating screw
(PTPWH
(PTPWH
M2.6)
two springs
(insulator)
(insulator)
two springs (insulator)
two floating screws
(PTPWH
(PTPWH
M2.6)
insulator
insulator
– bottom view –
Remove four solders.
flexible flat cable (16 core)
(CNP701)
(CNP701)
CD board
optical pick-up block
(KSM-213CCP)
(KSM-213CCP)
screw
(BVTT2
(BVTT2
× 6)
ICF-CDK50
10
SECTION 4
TEST MODE
TEST OF LCD, LED AND KEY
Mode that test LCD, LED and key.
Procedure:
1. Press three keys of the [OFF], [PRESET 1] and [MEGA BASS] simultaneously. Then turn the power on.
2. Version number of the microcomputer is displayed when entering the mode.
3. All segments light when [TIMER PUSH START/STOP] is pressed.
4. When the key is pressed, the segment corresponding to the key is turned off. Refer to the fi gure below for the correspondence of the key
Mode that test LCD, LED and key.
Procedure:
1. Press three keys of the [OFF], [PRESET 1] and [MEGA BASS] simultaneously. Then turn the power on.
2. Version number of the microcomputer is displayed when entering the mode.
3. All segments light when [TIMER PUSH START/STOP] is pressed.
4. When the key is pressed, the segment corresponding to the key is turned off. Refer to the fi gure below for the correspondence of the key
and the segment.
5. After all keys are pushed, [TIMER PUSH START/STOP] is pushed again. Test mode is ended, and reset start is done.
CD TEST MODE
Procedure:
1. Turn the power on.
2. Insert the CD, and play it.
3. Set the test mode by momentarily shorting both of TP410 ties to TP411 on the LCD board. (The message “002 88” is displayed on the
Procedure:
1. Turn the power on.
2. Insert the CD, and play it.
3. Set the test mode by momentarily shorting both of TP410 ties to TP411 on the LCD board. (The message “002 88” is displayed on the
liquid crystal display)
4. Operate it referring to the fi gure of next page.
KEY
SEGMENT (LED is contained)
KEY
SEGMENT
CLOCK
FM2,FM1,RADIO,0C,0B,ST,
MODE
3D,3C,3B,AUDIO IN
Z
OPEN/CLOSE
3E,3G,3F,3A,TIMER-LED,
AUDIO IN
4E,4G,4F,4A
PRESET-1
PM,AM,FM MONO,MEGABASS, TUNE/TRACK .
4D,4C,4B,SHUF
PRESET-2
1E,1G,1F,1A
TUNE/TRACK >
KHz,MHz,
,1
PRESET-3
1D,1C,1B
PLAY/PAUSE
5E,5G,5F,5A
PRESET-4
2E,2G,2F,2A
OFF x
5D,5C,5B,
PRESET-5
2D,2C,2B,
RADIO/BAND
6E,6G,6F,6A
MEGABASS
DOT,COL,
,CD
TIME ZONE
6D,6C,6B,
ICF-CDK50
11
NORMAL MODE
INITIAL
(TEST MODE IN)
(TEST MODE IN)
88
81
STOP 1 MODE
Whenever the
MODE key is
pressed, each
adjustment value
is displayed.
MODE key is
pressed, each
adjustment value
is displayed.
82
; key
; key
; key
;
key
STOP 2 MODE
82
COMMAND
FORWARDING
MODE
FORWARDING
MODE
F-
FOCUS 2 MODE
FOCUS 1
MODE
MODE
F-
P-
ALL SERVO
ON MODE
ON MODE
P-
61
TG UP MODE
A-
AUTO
ADJUSTMENT
MODE
ADJUSTMENT
MODE
Auto adjustment: NG
Auto adjustment: OK
V key
V key
V
key
V key
V
key
V key
V key
V key
V
key
V
key
V
key
;
key
CLOCK/DA
TE key
;
key
MODE key
82
ALL SERVO
ON MODE
(IN COMMAND
FORWARDING
MODE)
ON MODE
(IN COMMAND
FORWARDING
MODE)
CLOCK/DA
TE key
82
TG UP MODE
(IN COMMAND
FORWARDING
MODE)
(IN COMMAND
FORWARDING
MODE)
MEGA BASS key
MEGA BASS key
MODE key
MODE key
Whenever the
MODE key is
pressed, each
adjustment value
is displayed.
MODE key is
pressed, each
adjustment value
is displayed.
MODE key
;key
MODE key
;key
;key
MODE key
Whenever the
MODE key is
pressed, each
adjustment value
is displayed.
MODE key is
pressed, each
adjustment value
is displayed.
Content of adjustment value
92xx
92xx
: RF offset
94xx :
Tracking
balance
95xx :
Tracking
in
96xx
: Focus balance
97xx
: Focus in
EAxx
: All in setting
98xx
: VC offset
99xx
: Sled offset
9Axx
: Focus offset
9bxx :
Tracking
offset
9Cxx
: AC amplifier offset
9dxx
: BD amplifier offset
9Exx
: E amplifier offset
9Fxx
: F amplifier offset
61xx
: APC reference level setting
Note: 61, 92 to 9F, EA : register address of DSP
xx
xx
: adjustment value (Hexadecimal number)
MODE key
MEGA BASS key
MEGA BASS key
Checking Location:
TP411
TP410
– LCD Board (Conductor Side) –
Fig. 1 Method of operating CD test mode
ICF-CDK50
12
SECTION 5
ELECTRICAL ADJUSTMENTS
TUNER SECTION
0 dB = 1
μV
[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
4 7
MAIN board
CN303 pin
MAIN board
CN303 pin
[FM]
Setting
Function: RADIO
Band: FM
Setting
Function: RADIO
Band: FM
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level:
as low as possible
+
–
level meter
MAIN board
CN303 pin
MAIN board
CN303 pin
set
4 7
0.01 F
TU board
TP (GND)
TU board
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k 7
TU board
• Repeat the procedures in each adjustment several times, and
the tracking adjustments should be fi nally done by the trimmer
capacitors.
capacitors.
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
no mark: US and canadian models ( ): AEP model
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display
Reading on Digital
Voltmeter
L4
530 kHz (531 kHz) 1.0 ± 0.1 V (0.9 ± 0.4 V)
Confi rmation
1,710 kHz (1611 kHz) 5.3 ± 0.4 V (5.2 ± 0.5 V)
no mark: US and canadian models ( ): AEP model
AM TRACKING ADJUSTMENT
Adjustment for a maximum reading on level meter
L3
620 kHz (621 kHz)
CT3
1,400 kHz (1,404 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
L2
108 MHz
3.0 ± 0.2 V
Confi rmation
87.5 MHz
1.3 ± 0.2 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: TU board (See page 13)
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