Read Sony CMT-X5CD / CMT-X5CDB / CMT-X7CD / CMT-X7CDB Service Manual online
CMT-X5CD/X5CDB/X7CD/X7CDB
CMT-X5CD/X5CDB/X7CD/X7CDB
41
41
SECTION 4
ELECTRICAL CHECKS
TUNER SECTION 0 dB = 1 V
FM AUTO STOP CHECK
signal
generator
unit
Procedure:
1. Press the [
1. Press the [
?
/
1
] button to turn the power on.
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
Deviation
: 75 kHz
Modulation
: 1 kHz
ANT input
: 35 dBu (EMF)
Note: Use 75 ohm coaxial cable to connect signal generator and the unit.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Touch the [FUNCTION] button to turn the FM tuner function
and scan the input FM signal with automatic scanning.
4. Confi rm that input frequency of A, B and C detected and auto-
matic scanning stops.
When the station signal is received in good condition, automatic
scanning stops.
scanning stops.
CD SECTION
Note:
1. CD block is basically constructed to operate without adjustment.
2. Use the HLX-A1 test disc (Part No. J-2501-307-A) unless otherwise
1. CD block is basically constructed to operate without adjustment.
2. Use the HLX-A1 test disc (Part No. J-2501-307-A) unless otherwise
indicated.
3. Clean the object lens by an applicator with neutral detergent when the
check result is “NG” with the following check.
SERVO CHECK
It can confi rm the servo function.
It can confi rm the servo function.
Note 1: A button having no particular description in the text, indicates the
main unit button.
Also the remote commander use the following when performing
this mode.
It cannot be operated with the remote commander attached to this
unit.
Part No.
Description
1-489-989-11
REMOTE COMMANDER (RM-AMU139)
Procedure:
1. Press the [
1. Press the [
?
/
1
] button to turn the power on.
2. Touch the [FUNCTION] button to select the
“
CD
”
function.
3. Touch and press two buttons of the [
u
] and [
?/1
] simultane-
ously for fi ve seconds, or press the buttons on the remote com-
mander in order of the [ALPHABET SEARCH] → [9] → [1]
→ [ENTER] (press the next button within three seconds).
mander in order of the [ALPHABET SEARCH] → [9] → [1]
→ [ENTER] (press the next button within three seconds).
Note 2: The specifi cations are the same even if entering to the check mode
by either operation.
4. Check that “SET DISC” is displayed on the liquid crystal dis-
play.
Screen display
5. Insert the test disc (HLX-A1) in the unit.
6. Servo check is started, following screen is displayed on the
6. Servo check is started, following screen is displayed on the
liquid crystal display.
Servo check start
Servo check end
N
N
N
N
N
N
N
N
7. When servo check is ended, the test disc (HLX-A1) is ejected
automatically, and “PASS” or “NG X” (X: error No. (1 to 8))
is displayed on the liquid crystal display.
is displayed on the liquid crystal display.
Screen display
or
Error No.
(1 to 8)
Error No.
Servo Check Item
1
Disc Type
2
SPFG (No Check)
3
Mirror Time
4
TE_Level
5
S_Level
6
S_Balance
7
RFLvl
8
Jitter
Releasing method:
It can release by any of the following method.
• Touch and press two buttons of the [
It can release by any of the following method.
• Touch and press two buttons of the [
u
] and [
?/1
] simultane-
ously for fi ve seconds.
• Press the buttons on the remote commander in order of the
[ALPHABET SEARCH] → [9] → [1] → [ENTER].
(Press the next button within three seconds)
• Touch the [FUNCTION] button to select the except CD func-
tion.
• Press the [
?
/
1
] button to turn the power off.
2-4. WiFi Reception Level (CMT-X7CD/X7CDB only)
It can display the reception level at the time of wireless LAN con-
nection.
It can display the reception level at the time of wireless LAN con-
nection.
Procedure:
1. Set this unit to wireless LAN connection state.
(Refer to “CHECKING METHOD OF NETWORK CON-
1. Set this unit to wireless LAN connection state.
(Refer to “CHECKING METHOD OF NETWORK CON-
NECTION” on page 5)
2. Press the buttons on the remote commander in order of the
[ALPHABET SEARCH] → [9] → [7] → [ENTER].
(Press the next button within three seconds)
3. The reception level is displayed on the liquid crystal display.
Screen display
Reception level
(0 to 99)
Releasing method:
Press the [
Press the [
?
/
1
] button to turn the power off or press the buttons on
the remote commander in order of the [ALPHABET SEARCH] →
[9] → [7] → [ENTER].
(Press the next button within three seconds)
[9] → [7] → [ENTER].
(Press the next button within three seconds)
2-5. Auto Standby Test
It can confi rm the auto standby function operates normally.
The auto standby function operates in 60 seconds in this mode.
(Usually, it takes 15 minutes)
It can confi rm the auto standby function operates normally.
The auto standby function operates in 60 seconds in this mode.
(Usually, it takes 15 minutes)
Procedure:
1. Press the [
1. Press the [
?
/
1
] button to turn the power on.
2. Touch the [FUNCTION] button to select except “FM” and
“DAB”.
3. Press the buttons on the remote commander in order of the
[ALPHABET SEARCH] → [9] → [9] → [ENTER].
(Press the next button within three seconds)
4. It enters the auto standby test mode, and the following screen
is displayed on the liquid crystal display.
(In this mode, “ ”continues lighting up and “ST” continues
blinking on the liquid crystal display)
blinking on the liquid crystal display)
Screen display of “CD”, “USB”, “BT AUDIO”, “AUDIO IN” function
Screen display of “NETWORK” function
ST
ST
ST
Blinking
ST
ST
Blinking
Countdown
timer
(60 to 0)
Signal level
(0 or 1)
Countdown
timer
(60 to 0)
5. In the case of the following states, the countdown timer de-
creases. This unit will become standby states if the countdown
timer decreases to “0”.
timer decreases to “0”.
• Operation is not performed.
• The signal level is lower than threshold.
(“CD”, “USB”, “BT AUDIO”, “AUDIO IN” function only)
• NETWORK audio is stop status.
(“NETWORK” function only)
Releasing method:
Press the buttons on the remote commander in order of the [AL-
PHABET SEARCH] → [9] → [9] → [ENTER].
(Press the next button within three seconds)
Press the buttons on the remote commander in order of the [AL-
PHABET SEARCH] → [9] → [9] → [ENTER].
(Press the next button within three seconds)
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