Electrical Check - Sony HCD-GTR333 Service Manual

HCD-GTR333/GTR555/GTR777/GTR888
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [EX-CHANGE] button and [POWER] button
simultaneously. The system turns off automatically.
4. Message "MECHA LOCK" is displayed on the
fl uorescent indicator tube and the CD ship mode is
set.
[CD TRAY LOCK MODE]
• This mode let you lock the disc tray. When this mode is
activated, the disc tray will not open when [Z OPEN/
CLOSE] button or [EX-CHANGE] button is pressed. The
message "LOCKED" will be displayed on the fl uorescent
indicator tube. This mode only applied when there is disc(s)
on the tray.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [STOP] button and [ENTER] button si-
multaneously and hold down until "LOCKED"
or "UNLOCKED" displayed on the fl uorescent
indicator tube (around 5 seconds).
[FACTORY PRESET]
• This mode is use to load all the factory use preset
frequencies into FM 1-FM 20 and AM 1-AM 10. Originally,
frequency of FM 1-FM 20 and AM 1-AM10 are set to the
minimum frequency.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Press [TV] button and [FUNCTION] button
simultaneously and hold for 3 seconds, message
"FACTORY" appears on the fl uorescent indicator
tube. The function is changed to TUNER automati-
cally.
[CDM AGING MODE]
• This mode is used to display the total count of meter
pointer touch initial switch and max switch.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function and All DISC play mode.
3. Put discs on all trays and close the tray.
4. Press [B ??] button and [EXCHANGE] button
simultaneously for 3 seconds.
5. The fl uorescent indicator tube displays Aging
Display "AG xxxx/yyyy".
"xxxx" represents the error counter
(Maximum Value of "xxxx" = 9999)
"yyyyy" represents the cycle counter
(Maximum Value of "yyyy" = 9999)
6. Press [<<] or [>>] to search for Aging History
Error Display.
The fl uorescent indicator tube displays "Mx E1E2E3E4".
x: error history number
E1: Loading sequence JCP high
E2: Loading sequence JCP low
E3: Loading operation JCP
E4: Cam position operation JCP
7. Press [ENTER] to Aging Display.
• To release from CDM Aging Mode.
To release from this mode, press [POWER] button or
perform COLD RESET operation.
16
SECTION 4

ELECTRICAL CHECK

TUNER SECTION
FM AUTO STOP CHECK
set
Procedure:
1. 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 : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Please use 75 ohm "coaxial cable" to connect SG and the
Note:
set. You cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to 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
automatic scanning stops.
The stop of automatic scanning means "The station signal is
received in good condition".
0 dB = 1 μV
signal
generator
+
75
–