Mechanism Section Adjustments; How To Enter Playback Mode Without Cassette; Tape Path Adjustment - Sony DCR-TRV940 Adjustment Manual

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6-2. MECHANISM SECTION ADJUSTMENTS

On the mechanism section adjustment
For details of mechanism section adjustments, checks, and replace-
ment of mechanism parts, refer to the separate volume "DV ME-
CHANICAL ADJUSTMENT MANUAL VI J Mechanism ".
2-1. HOW TO ENTER RECORD MODE WITHOUT
CASSETTE
1) Connect the adjustment remote commander to the LANC jack.
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, set data: 0C, and press the PAUSE
button of the adjustment remote commander.
(The mechanism enters the record mode automatically.)
Note: The function buttons become 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.)
2-2. HOW TO ENTER PLAYBACK MODE WITHOUT
CASSETTE
1) Connect the adjustment remote commander to the LANC jack.
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, set data: 0B, and press the PAUSE
button of the adjustment remote commander.
(The mechanism enters the playback mode automatically.)
Note: The function buttons become 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.)
2-3.

TAPE PATH ADJUSTMENT

1. Preparation for Adjustment
1) Clean the tape running side (tape guide, drum, capstan shaft,
pinch roller, etc.).
2) Connect the adjustment remote commander to the LANC jack.
3) Turn the HOLD switch of the adjustment remote commander
to the ON position.
4) Connect an oscilloscope to VC-288 board CN1008 via the
CPC-8 jig (J-6082-388-A).
Channel 1: VC-288 board, CN1008 Pin w; (Note)
External trigger: VC-288 board, CN1008 Pin qj
Note: Connect a 75 Ω resistor between pins w; of CN1008
and ql (GND).
75 Ω resistor (Parts code: 1-247-804-11)
5) Playback the alignment tape for tracking. (XH2-1)
6) Select page: 3, address: 33, and set data: 08.
7) Select page: 3, address: 26, and set data: 31.
8) Check that the oscilloscope RF waveform is normal at the en-
trance and exit.
If not normal, adjust according to the separate volume
"DV MECHANICAL ADJUSTMENT MANUAL VI
J Mechanism " .
DCR-TRV940/TRV940E/TRV950/TRV950E
CN1008 of VC-288 board
Pin No. Signal Name
1 N.C.
3 EVF_LED_DA
5 EVF_VCO
7 MD2
9 XINIT
11 DRUM_ON
13 REC_CRRT1
15 REG_GND
17 SWP
19 GND
2. Procedure after operations
1) Connect the adjustment remote commander to the LANC jack
and set the HOLD switch to the ON position.
2) Select page: 3, address: 26, and set data: 00.
3) Select page: 3, address: 33, and set data: 00.
Check this section
Entrance side
(Normal waveform)
CH1
CH2
(Trigger)
3.3 msec
6-49
Pin No. Signal Name
2 D_2.8V
4 EVF_VG
6 GND
8 XCS_MC_FLASH
10 XCS_ST_IMAGE_IC
12 FRRV
14 REC_CRRT0
16 HI_XRESET
18 RF_IN
20 RF_MON
Exit side
Fig. 6-2-1