Sony XDR-M1 Service Manual ▷ View online
5
XDR-M1
2-3. CHASSIS SECTION
2-2. MAIN BOARD
2
screw
(B1.4)
3
1
battery terminal (–)
7
MAIN board
4
CN401
5
Remove the solder.
6
Remove the three solders.
RED
BRN
RED
BLK
MAIN board
2
three screws
(1.7)
3
two screws
(1.7)
4
chassis section
1
Remove the three solders.
GRY
BLK
RED
KEY board
6
XDR-M1
2-4. MICON BOARD, JACK BOARD
3
screw
(B1.4)
1
screw
(B1.4)
9
holder (LCD)
claw
claw
chassis assy
qd
claw
qf
JACK board
qa
LCD701
qs
MICON board
0
CN402
8
EL501
6
LCD bracket
2
4
5
7
Remove the two solders.
7
XDR-M1
SECTION 3
TEST MODE
• LCD Check Mode
The XDR-M1 provides the test mode that allows checking of LCD
lightings.
If any of the resultant displays is different from the specified one,
the LCD’s may be faulty.
lightings.
If any of the resultant displays is different from the specified one,
the LCD’s may be faulty.
Procedure:
1. Press the “RESET” button on the rear of the set while pressing
1. Press the “RESET” button on the rear of the set while pressing
the “MENU” key and the “LIGHT” key.
2. The test mode is entered and the screen looks like below.
Table of difference
Destination
Display
UK
CEK
CED
CED
VER: xxx
T x represents the version of software.
3. Press the “MENU” key, and select LCD CHECK by using the
keys v and V.
Then press “ENTER” key.
Then press “ENTER” key.
4. Pressing the v key lights up all of the LCD’s.
5. Pressing the v key shows the following display.
6. Pressing the v key shows the following display.
7. Pressing the v key lights out all of the LCD’s.
8. After verification, pressing the “RESET” button terminates the
test mode.
It should be remembered that when the “RESET” button is
pressed, all the settings such as clock and favorite settings will
be reset to the factory settings.
It should be remembered that when the “RESET” button is
pressed, all the settings such as clock and favorite settings will
be reset to the factory settings.
8
XDR-M1
SECTION 4
ELECTRICAL ADJUSTMENTS
FM SECTION
• FM RF Adjustment
Note:
The test land VT and GND on the MAIN board used for VT
check.
check.
1. Press the POWER switch to turn on the radio.
2. Press the DAB/FM switch and set to 87.5 MHz.
3. Check that the test land VT voltage is at 2.4±0.5 (1.9 to 2.9)
2. Press the DAB/FM switch and set to 87.5 MHz.
3. Check that the test land VT voltage is at 2.4±0.5 (1.9 to 2.9)
Vdc using a digital voltmeter.
4. Set the signal generator frequency to 108.0 MHz.
5. Press the ENTER/SC switch and set to 108.0 MHz.
6. Check that the test land VT voltage is at 8.0±1.0 (7.0 to 9.0)
5. Press the ENTER/SC switch and set to 108.0 MHz.
6. Check that the test land VT voltage is at 8.0±1.0 (7.0 to 9.0)
Vdc using a digital voltmeter.
7. Adjust CT1 so that the needle of digital voltmeter indicates the
maximum level. (RF MAX)
8. Set the signal generator frequency to 87.5 MHz.
9. Press the ENTER/SC switch and set to 87.5 MHz.
10. Adjust L301 so that the needle of digital voltmeter indicates the
9. Press the ENTER/SC switch and set to 87.5 MHz.
10. Adjust L301 so that the needle of digital voltmeter indicates the
maximum level. (RF MIN)
Adjustment Location:
L301
VT
IC302
CT1
FM RF ADJUSTMENT
(RF MAX)
L301
FM RF ADJUSTMENT
(RF MIN)
– MAIN BOARD (SIDE B) –
– MAIN BOARD (SIDE A) –
GND
1
1
15
16
20
1
10
11
20
11
10
30
IC101
IC301
IC201
6
5
8
1
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