Mechanism Service Mode; How To Set The "Mechanism Service Mode; Jig Rcu Mode; Setting The Jig Rcu Mode - JVC HM-DH30000U Service Manual

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1.5 Mechanism service mode

This model has a unique function to enter the mechanism
into every operation mode without loading of any cassette
tape. This function is called the "Mechanism service mode".

1.5.1 How to set the "Mechanism service mode"

(1) Unplug the power cord plug from the power outlet.
(2) Remove the front panel assembly.
(3) Connect TP7001(MECHA 1) and TP7002(MECHA 2) on
the Display board assembly with a jump wire.
(4) Insert the power cord plug into the power outlet.
(5) With lock levers (A) (B) on the left and right of the Cas-
sette holder assembly pulled toward the front, slide the
holder in the same direction as the cassette insertion di-
rection. (For the positions of lock levers (A) (B), refer to
the "Procedures for lowering the Cassette holder assem-
bly" of 1.3 Disassembly/assembly method.)
(6) The cassette holder lowers and, when the loading has
completed, the mechanism enters the desired mode.
1.6

Jig RCU mode

This unit uses the following two modes for receiving remote
control codes.
1) User RCU mode : Ordinary mode for use by the user.
2) Jig RCU mode : Mode for use in production and serv-
icing.
When using the Jig RCU, it is required to set the VCR to
the Jig RCU mode (the mode in which codes from the Jig
RCU can be received). As both of the above two modes
are stored in the EEPROM, it is required to set the VCR
back to the User RCU mode each time that an adjustment
is made or to check that the necessary operations have
been completed. These modes can be set by the opera-
tions described below.

1.6.1 Setting the Jig RCU mode

(1) Unplug the power cord plug from the power outlet.
(2) Press and hold the "REC" and "PAUSE" buttons on the
VCR simultaneously, while plugging the power cord plug
into the power outlet.
When the VCR is set to the Jig RCU mode, the symbols
( " : " ) in the time display of the FDP are turned off.

1.6.2 Setting the User RCU mode

(1) Turn off the power.
(2) Press the "REC" and "PAUSE" buttons of the VCR si-
multaneously. Alternatively, transmit the code "80" from
the Jig RCU.
1-6

1.7 Opening on the chassis

The chassis of this VCR has openings for diagnosis of some
parts on the board assembly.
Published in Heiloo Holland
Rotary encoder
Reel sensor
(Supply)
Reel sensor
(Take-up)
IC3001
TU6001
CN3011
Fig. 1-7-1a
29/11/2016