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6-31

DCR-TRV270E/TRV280/TRV285E

Mechanism Section adjustments, checks, and replacement of
mechanism parts, refer to the separate volume “8mm Video Me-
chanical Adjustment Manual IX   M2000 Mechanism  ”.

Note 1: Before perform the adjustments, check that the data of

page: 0, address: 10 is “00”.
If not, select page: 0, address: 10, and set the data “00”.

Note 2: NTSC model: DCR-TRV280

PAL model: DCR-TRV270E/TRV285E

Connect the adjustment remote commander to CN1011 of VC-
344 board via I/F unit for LANC control (J-6082-521-A) and CPC
jig connector (J-6082-539-A). To operate the adjustment remote
commander, connect the AC power adapter (8.4Vdc) to the DC IN
jack of I/F unit for LANC control, or connect the L series Info-
LITHIUM battery to the battery terminal of I/F unit for LANC
control.

1)

Connect the adjustment remote commander.

2) Turn the HOLD switch of the adjustment remote commander

to the ON position.

3) Close the cassette compartment without the cassette.
4) Select page: 3, address: 01, and set data: 0C, and press the

PAUSE button of the adjustment remote commander.
(The mechanism enters the record mode automatically.)
Note: The function buttons becomes inoperable.

5) To quit the record mode, select page: 3, address: 01, set data:

00, and press the PAUSE button of the adjustment remote com-
mander. (Whenever you want to quit the record mode, be sure
to quit following this procedure.)

1) Connect the adjustment remote commander.
2) Turn the HOLD switch of the adjustment remote commander

to the ON position.

3) Close the cassette compartment without the cassette.
4) Select page: 3, address: 01, and set data: 0B, and press the

PAUSE button of the adjustment remote commander.
(The mechanism enters the playback mode automatically.)
Note: The function buttons becomes inoperable.

5) To quit the playback mode, select page: 3, address: 01, set

data: 00, and press the PAUSE button of the adjustment re-
mote commander. (Whenever you want to quit the playback
mode, be sure to quit following this procedure.)

TG6

TG2

Capstan shaft

TG7

Pinch roller 

T reel

S reel

TG1

TG3

TG4

TG5

Drum

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DCR-TRV270E/TRV280/TRV285E

1) Clean the tape path face (tape guide, drum, capstan shaft, pinch

roller).

2) Connect the adjustment remote commander.
3) Turn  on the HOLD switch of the adjustment remote com-

mander.

4) Select page: 3, address: 33, and set data: 08.
5) Connect the oscilloscope to I/F unit for LANC control.

Channel 1: PB RF (MON)
Channel 2: SWP
Note: Connect a 75 

Ω resistor between the test point PB

RF (MON) and GND.
75 

Ω resistor (Parts code: 1-247-804-11)

6) Playback the SW/OL standard tape. (WR5-2D)
7) Check that the oscilloscope RF waveform is flat at the entrance

and exit.
If not flat, perform the following section 2-4-2. until it is flat.

8) Perform “Processing after operations”, after completing ad-

justment.

[Processing after operations]
1) Connect the adjustment remote commander, and turn on the

HOLD switch.

2) Select page: 3, address: 33, and set data: 00.
3) Remove the power supply from the unit.

CH1

Normal

CH2

CH1

Entrance side faulty

CH2

CH1

Exit side faulty

CH2

Pin No.

Signal Name

Pin No.

Signal Name

BL

15

EVF VCO

14

EVF VG

BL 4.75

9

PB RF (MON)

3

BPF MONI

6, 8 ,10

GND

TMS

7

REC RF (RF IN)

TDI

TDO

5

SWP

TCK

4

CAP FG

2

IR VIDEO

Note: Pin No. are those of CN1011.

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DCR-TRV270E/TRV280/TRV285E

1) Playback the SW/OL standard tape. (WR5-2D)
2) Turn the tape guide No.3 and No.6 alternately until the wave-

form becomes flat. (Fig. 6-2-5)
Note: Zenith adjustment screws for the TG3 and TG6 do not

need to be adjusted.

[Entrance side adjustment]
3) Turn the No.3 guide slowly in the clockwise direction until

the waveform amplitude at the entrance side begins to become
small. (Fig. 6-2-6 (A))
Confirm the rotation angle (A) of the No.3 guide.

4) Turn the No.3 guide slowly in the counterclockwise direction

until the waveform becomes flat. (Fig. 6-2-5)

5) Turn the No.3 guide slowly in the counterclockwise direction

until the waveform amplitude at the entrance side begins to
become small. (Fig. 6-2-6 (B))
Confirm the rotation angle (B) of the No.3 guide.

6) Turn the No.3 guide slowly in the clockwise direction and set

up in the angle (C) in the middle of the rotation angle (A) and
the rotation angle (B). (Fig. 6-2-4)

[Exit side adjustment]
7) Turn the No.6 guide slowly in the clockwise direction until

the waveform amplitude at the exit side begins to become small.
(Fig. 6-2-7 (A))
Confirm the rotation angle (A) of the No.6 guide.

8) Turn the No.6 guide slowly in the counterclockwise direction

until the waveform becomes flat. (Fig. 6-2-5)

9) Turn the No.6 guide slowly in the counterclockwise direction

until the waveform amplitude at the exit side begins to be-
come small. (Fig. 6-2-7 (B))
Confirm the rotation angle (B) of the No.6 guide.

10) Turn the No.3 guide slowly in the clockwise direction and set

up in the angle (C) in the middle of the rotation angle (A) and
the rotation angle (B). (Fig. 6-2-4)

Entrance side amplitude

Entrance side amplitude

Exit side amplitude

Exit side amplitude

Guide zenith adjustment screw

No.6 guide
(TG6)

No.3 guide
(TG3)

C

No.3 guide

or 

No.6 guide

A

B

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DCR-TRV270E/TRV280/TRV285E

1) Playback a tape in REV mode.
2) Confirm that tape slack dose not occur in between the guide

No.6 (TG6) 1 and capstan 2. If the tape slack is found, turn
the height adjustment screw 4 of the Guide No.7 (TG7) 3
until tape slack is removed.

3) Playback a tape in normal mode. Confirm that tape slack dose

not occur in between the guide No.7 (TG7) 3 and capstan 2.
(Specification = 0.5 mm or less) If the tape slack of more than
0.5 mm is found, turn the height adjustment screw 4 until the
slack is 0.5 mm or less. Playback a tape in REV mode and
confirm that tape slack occurred in between the guide No.6
(TG6) 1 and capstan 2 is 0.3 mm or less, the adjustment is
complete.

1) Playback the SW/OL standard tape (WR5-2D) in REV mode.

Confirm that pitches between the peaks of the waveform are
equally spaced for 5 seconds or longer.
The pitches are not equally spaced, perform section “2-4-2.
Tape Path Adjustment” and section “2-4-3. No.7 Guide (TG7)
Adjustment”.

2) Playback the SW/OL standard tape in CUE mode.

Confirm that pitches between the peaks of the waveform are
equally spaced for 5 seconds or longer.
The pitches are not equally spaced, perform section “2-4-2.
Tape Path Adjustment”.

1) Playback the SW/OL standard tape.
2) Eject the tape once, insert and load the tape.
3) Start playing back the tape and confirm that the RF waveform

builds up in three seconds with flat envelope. Confirm at this
time that tape slack dose not occur near pinch roller.

4) Playback the tape in CUE/REV and FF/REW modes respec-

tively. Confirm that the RF waveform builds up in three sec-
onds with flat envelope. Confirm at this time that tape slack
dose not occur near pinch roller.

5) Repeat the check items 2) to 5) again.

1) Insert a thin video tape such as P5-120MP. Playback the thin

tape. Confirm that there is no clearance or curl of 0.3 mm or
more at the following points: Upper flange of guide No.3, up-
per flange of guide No. 6, upper and lower flanges of guide
No.7.

2) Confirm that there is no clearance or curl of 0.3 mm or more at

each tape guide when the FF button is pressed from the play-
back mode to enter the CUE mode, and when the REW button
is pressed from the playback mode to enter the REV mode.

Tape slack

2

Capstan

1

No.6 guide
(TG6)

3

No.7 guide
(TG7)

4

TG7 nut

a

b

c

d

Tape slack

Capstan

No.6 guide
(TG6)

No.7 guide
(TG7)

Capstan 

Drum

Pinch roller

No.7 guide
(TG7)

No.6 guide
(TG6)

No.3 guide
(TG3)

No.1 guide 
(TG1)