Sony ICF-DVD57TV Service Manual ▷ View online
13
ICF-DVD57TV
SECTION 4
TEST MODE
LCD TEST MODE
Procedure:
1. Turn the power on while pressing simultaneously three keys
of
M
,
x
and [TV MENU].
2. The microprocessor version will be displayed on the LCD.
3. Press the
3. Press the
Z
key. The LCD display will become as follows.
LCD display
4. The display corresponding to a key is turned off, if a key on
the set is pressed.
Key Corresponding Table
Key
Segment
TIMER
TIMER , TIMER LED
CLOCK
AM, PM, : (colon)
MODE
5a, 5d, MEGA EXPAND, P, kHz, MHz
TV MENU
6b, 6c, 6d, 6e, 6g, 5c, 5e
SOUND
MEGA BASS
VOLUME –
– VOL –
VOLUME +
. (dot)
m
5f
M
6a
.
4a, 4d, 4e
>
1d, 1h, 1a, 1e, 1f, 1g
u
2c, 2f, 2h, 2i
x
3e, 3f
OFF
1b, 1c, 2a, 2b, 2d, 2e, 2g, 3a, 3b, 3c, 3d, 3g,
4b, 4c, 4f, 4g
4b, 4c, 4f, 4g
BAND
RADIO, FM
DVD
DVD
TV
TV
AUX
AUX
5. After all keys on the set were pressed, press the Z key, and
the test mode will be released.
RADIO
TIMER
DVD
FM
AM
TV
AUX
PM
kHz
MHz
MEGABASS
VOL
MEGAXpand
TV TEST MODE
Procedure:
1. Turn the power on while pressing simultaneously two keys
of
M
and
x
.
2. When the TV test mode is activated, the monitor will become
as follows.
SR7596 TEST MODE MENU
1. INITIAL MENU
2. FOR FACTORY
3. LCD SETTING
4. LOAD DEFAULT
5. TUNER TEST
SR7596 Ver. 1.00a
3. Five items can be changed over by pressing the [TV MENU]
key.
4. The selected item is displayed in red and the items not selected
are displayed in cyan. (“SR7596 Ver. 1.00a” is displayed in red.)
5. You can enter the selected item by pressing the [ENTER] key.
6. Also, an item can be selected directly with the [1] to [5] keys
6. Also, an item can be selected directly with the [1] to [5] keys
on the remote commander (RMT-CDVD57A).
1.
INITIAL MENU (TV MENU PRESET)
•
TV menu item is initialized.
Procedure:
1. Press the [TV MENU] key to select the “INITIAL MENU” on
the main screen.
2. Each item of TV menu can be initialized, if pressing the
[ENTER] key.
2.
FOR FACTORY (FOR ADJUSTMENT)
•
It is used at the time of adjustment.
Procedure:
1. Press the [TV MENU] key to select the “FOR FACTORY” on
the main screen.
2. A changing between setting item and “EXIT” is possible by
pressing the [TV MENU] key. (The selected item is displayed
in red)
in red)
3. If the [ENTER] key is pressed when the setting item has been
selected, settable items can be changed over, and the value of
the selected item can be adjusted by pressing the
the selected item can be adjusted by pressing the
. /
>
keys. (For details, refer to VIDEO BUS ADJUSTMENT
(See page 19))
4. The main screen comes back if the [ENTER] key is pressed
when “EXIT” has been selected.
Note: The same operation is also carried out by pressing the keys
on the remote commander.
3.
LCD SETTING
This mode is not used in servicing.
4.
LOAD DEFAULT
•
It carries out, only when EEPROM (IC1451) is exchanged.
Procedure:
1. Press the [TV MENU] key to select the “LOAD DEFAULT” on
the main screen.
2. All settings can be initialized, if pressing the [ENTER] key.
(In addition to the “INITIAL MENU”, set value of RGB
decoder (IC1501) and tuner N value)
decoder (IC1501) and tuner N value)
5.
TUNER TEST
This mode is not used in servicing.
14
ICF-DVD57TV
DVD TEST MODE
Procedure:
1. Turn the power on and press the [DVD] key to select the “DVD”.
2. Press the
2. Press the
Z
key to open the disc tray.
3. Press the key on the remote commander (RMT-CDVD57A)
as following order.
[TOPMENU]
→
[ANGLE]
→
[MENU]
→
[AUDIO]
4. When the test mode is activated, the monitor will become as
follows.
SR-7596 TEST MODE
JITTER VALUE – —
RF LEVEL – —
TRACKING ERROR AMP – —
FOCUS ERROR AMP – —
TRK SERVO GAIN AUTO ADJ – —
FCS SERVO GAIN AUTO ADJ – —
1.
DVD OPERATION CHECK
Procedure:
1. Insert the DVD test disc (TDV-540C) (Part No. J-2501-235-
A) to start the automatic adjustment for DVD.
2. Connect the multi meter to TP753 and TP751 on the DVD
board.
3. Check that the reading of multi meter is 40 to 75 mA.
4. Check that the JITTER VALUE of monitor is 2D5 to 000
4. Check that the JITTER VALUE of monitor is 2D5 to 000
HEX.
5. Connect the oscilloscope to TP761 and TP702 on the DVD
board.
6. Check that the RF LEVEL of monitor is B8 to 87 HEX.
7. Check that the oscilloscope waveform of RF signal is as shown
7. Check that the oscilloscope waveform of RF signal is as shown
in the figure below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
8. Check that the TRACKING ERROR AMP of monitor is EB
to 8C HEX.
9. Check that the FOCUS ERROR AMP of monitor is FF to BE
HEX.
10. Check that the TRK SERVO GAIN ADJ of monitor is 56 to
38 HEX.
11. Check that the FOCU SERVO GAIN ADJ of monitor is 42 to
18 HEX.
12. Insert the DVD test disc (HLX-N1) (Part No. 8-797-000-10)
and play the title5-chapter2 (full color bar 100%).
13. Connect the oscilloscope to TP706 and TP707 on the DVD
board.
14. Check that the oscilloscope waveform of Y signal is as shown
in the figure below.
550
±
100 mVp-p
15. Connect the oscilloscope to TP708 and TP709 on the DVD
board.
16. Check that the oscilloscope waveform of B-Y signal is as
shown in the figure below.
17. Connect the oscilloscope to TP710 and TP711 on the DVD
board.
18. Check that the oscilloscope waveform of R-Y signal is as
shown in the figure below.
2.
CD OPERATION CHECK
Procedure:
1. Insert the CD test disc (PATD-012) (Part No. 4-225-203-01)
to start the automatic adjustment for CD.
2. Connect the multi meter to TP753 and TP752 on the DVD
board.
3. Check that the reading of multi meter is 55 to 85 mA.
4. Check that the JITTER VALUE of monitor is 2BC to 000
4. Check that the JITTER VALUE of monitor is 2BC to 000
HEX.
5. Connect the oscilloscope to TP761 and TP702 on the DVD
board.
6. Check that the RF LEVEL of monitor is A5 to 70 HEX.
7. Check that the oscilloscope waveform of RF signal is as shown
7. Check that the oscilloscope waveform of RF signal is as shown
in the figure below. (eye pattern)
A good eye pattern means that the diamond shape (
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
8. Check that the TRACKING ERROR AMP of monitor is BA
to 6E HEX.
9. Check that the FOCUS ERROR AMP of monitor is FF to B9
HEX.
10. Check that the TRK SERVO GAIN ADJ of monitor is 4F to
32 HEX.
11. Check that the FOCU SERVO GAIN ADJ of monitor is 52 to
37 HEX.
1.0
±
0.1 Vp-p
1.45
±
0.1 Vp-p
1.45
±
0.1 Vp-p
700
±
200 mVp-p
15
ICF-DVD57TV
Connecting Location:
– DVD BOARD (Side B) –
TP761
TP752
TP751
TP753
TP707
TP706
TP702
TP709
TP711
TP710
TP708
16
ICF-DVD57TV
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
Confirmation
530 kHz
1.0
±
0.1 V
L4
1,710 kHz
5.3
±
0.7 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
620 kHz
CT3
1,400 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
Confirmation
87.5 MHz
1.3
±
0.2 V
L2
108 MHz
3.0
±
0.2 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment and Connecting Location:
TU board (See page 17)
TU board (See page 17)
TUNER SECTION
0 dB=1
µ
V
[AM]
Setting:
Function: RADIO
Band: AM
Function: RADIO
Band: AM
[FM]
Setting:
Function: RADIO
Band : FM
Function: RADIO
Band : FM
•
Repeat the procedures in each adjustment several times, and
the tracking adjustments should be finally done by the trimmer
capacitors.
capacitors.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
6
Ω
MAIN board
CN302 pin
CN302 pin
2
MAIN board
CN302 pin
CN302 pin
1
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level:
as low as possible
deviation by 400 Hz
signal
Output level:
as low as possible
+
–
–
level meter
MAIN board
CN302 pin
CN302 pin
2
MAIN board
CN302 pin
CN302 pin
1
set
6
Ω
0.01
µ
F
TU board
TP (GND)
TP (GND)
TU board
TP (ANT)
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k
Ω
TU board
SECTION 5
ELECTRICAL ADJUSTMENTS
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