Sony DCR-TRV145E / DCR-TRV147E / DCR-TRV245E / DCR-TRV250E (serv.man3) Service Manual ▷ View online
DCR-TRV145E/TRV147E/TRV245E/TRV250E
6-35
COVER
COVER
6-2. MECHANISM SECTION
ADJUSTMENTS
Mechanism Section adjustments, checks, and replacement of
mechanism parts, refer to the separate volume “8mm Video Me-
chanical Adjustment Manual IX M2000 Mechanism ”.
mechanism parts, refer to the separate volume “8mm Video Me-
chanical Adjustment Manual IX M2000 Mechanism ”.
2-1.
ADJUSTMENT REMOTE COMMANDER
Connect the adjustment remote commander to CN1011 of VC-
304 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.
304 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.
2-2.
HOW TO ENTER RECORD MODE
WITHOUT CASSETTE
WITHOUT CASSETTE
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
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.)
(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.)
mander. (Whenever you want to quit the record mode, be sure
to quit following this procedure.)
2-3.
HOW TO ENTER PLAYBACK MODE
WITHOUT CASSETTE
WITHOUT CASSETTE
1) Connect the adjustment remote commander.
2) Turn the HOLD switch of 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
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.)
(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.)
mote commander. (Whenever you want to quit the playback
mode, be sure to quit following this procedure.)
Fig. 6-2-1
TG6
TG2
Capstan shaft
TG7
Pinch roller
T reel
S reel
TG1
TG3
TG4
TG5
Drum
DCR-TRV145E/TRV147E/TRV245E/TRV250E
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2-4.
TAPE PATH ADJUSTMENT
2-4-1.
Preparations for Adjustment
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-
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.
5) Connect the oscilloscope to I/F unit for LANC control.
Channel 1: PB RF (MON)
Channel 2: SWP
Channel 2: SWP
Note:
Connect a 75
Ω resistor between the test point PB
RF (MON) and GND.
75
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
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.
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.
3) Remove the power supply from the unit.
Fig. 6-2-2
CH1
Normal
CH2
CH1
Entrance side faulty
CH2
CH1
Exit side faulty
CH2
Test point of I/F unit for LANC control
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.
Table 6-2-1.
DCR-TRV145E/TRV147E/TRV245E/TRV250E
6-37
2-4-2.
Tape Path Adjustment
1) Playback the SW/OL standard tape. (WR5-2D)
2) Turn the tape guide No.3 and No.6 alternately until the wave-
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.
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.
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.
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)
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.
(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.
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)
the rotation angle (B). (Fig. 6-2-4)
Entrance side amplitude
Entrance side amplitude
Exit side amplitude
Exit side amplitude
Fig. 6-2-5
Fig. 6-2-6 (A)
Fig. 6-2-6 (B)
Fig. 6-2-7 (A)
Fig. 6-2-7 (B)
Fig. 6-2-4
Fig. 6-2-3
Guide zenith adjustment screw
No.6 guide
(TG6)
(TG6)
No.3 guide
(TG3)
(TG3)
C
No.3 guide
or
No.6 guide
A
B
DCR-TRV145E/TRV147E/TRV245E/TRV250E
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2-4-3.
No.7 Guide (TG7) Adjustment
1) Playback a tape in REV mode.
2) Confirm that tape slack dose not occur in between the guide
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.
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.
(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.
2-4-4.
CUE, REV Waveforms Check
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”.
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”.
equally spaced for 5 seconds or longer.
The pitches are not equally spaced, perform section “2-4-2.
Tape path Adjustment”.
2-5.
CHECKS AFTER ADJUSTMENTS
2-5-1.
Waveform Build-up Check
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
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.
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.
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.
2-5-2.
Tape Path Check
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.
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.
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)
(TG6)
3
No.7 guide
(TG7)
(TG7)
4
TG7 nut
a
b
c
d
Tape slack
Capstan
No.6 guide
(TG6)
(TG6)
No.7 guide
(TG7)
(TG7)
Capstan
Drum
Pinch roller
No.7 guide
(TG7)
(TG7)
No.6 guide
(TG6)
(TG6)
No.3 guide
(TG3)
(TG3)
No.1 guide
(TG1)
(TG1)
Fig. 6-2-8
Fig. 6-2-9
Fig. 6-2-10
Fig. 6-2-11
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