Service Mode List - Memorex MVD4540C Service Manual

This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit
and on the remote control for more than a standard time in the appropriate condition. (See below chart.)
In case of the main unit and remote control, press the remote control buttons first, then press the main unit buttons.
Set
Set Key
Condition
VCR mode CH UP
CH UP
VCR mode
VCR mode
CH UP
(Playback)
Power Off CH DOWN
Set
Set Key
Condition
DVD mode
REC/OTR
(No disc)
DVD mode
STOP
(No disc)
Method
Press the ATR button on the
remote control for more than
2 seconds during PLAY.
Make the short circuit
between the test point of
SERVICE and the GND.

SERVICE MODE LIST

Standard
Set Key
Time
FF 2 sec.
PLAY 2 sec.
STOP 2 sec.
POWER 2 sec.
Standard
Remocon
Key Time
4 2 sec.
7 3 sec.
Adjusting of the Tracking to the center position.
Refer to the "MECHANICAL ADJUSTMENT" (GUIDE ROLLER) and "ELECTRICAL
ADJUSTMENT" (PG SHIFTER).
The BOT, EOT, and the Reel Sensor do not work and the VCR deck can be operated
without a cassette tape.
Refer to the "PREPARATION FOR SERVICING"
PLAY/REC total hours are displayed on the TV Monitor.
Refer to the "PREVENTIVE CHECKS AND SERVICE INTERVALS"
(CONFIRMATION OF HOURS USED).
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
Initialization of the factory on VCR.
NOTE: Do not use this for the normal servicing.
If you set a factory initialization, the memories are reset
such as the clock setting, the channel setting, and PLAY/
REC total hours.
Adjust the PG SHIFTER automatically.
Refer to the "ELECTRICAL ADJUSTMENT".
VCR operation mode at no connection of DVD.
Refer to the "PREPARATION FOR SERVICING"
NOTE: Although the DVD is connected, the DVD mode cannot be
selected.
Initialization of the factory on DVD.
NOTE: Do not use this for the normal servicing.
This function will only work without the setting of DVD
disc at DVD mode. While pressing the Remocon Key for
more than 2 seconds, press the Set Key simultaneously.
Releasing of PARENTAL LOCK.
Refer to the "PARENTAL CONTROL - RATING LEVEL".
NOTE: The function will only work without the setting of DVD disc
at DVD mode.
Operations
C2-1
Operations
Operations