6-3. Servo System Adjustment

6-3-2. Automatic PG Phase Adjustment

Preparation

 

. S1-1, S1-2

→ TEST (ON)

(UDR-9 board)

(Default setting : REC (OFF))

. S2-1, S2-2

→ TEST (ON)

(UDR-9 board)

(Default setting : REC (OFF))

.S4 (HN-260 board) → TEST (Default setting : REC )

.S1-1 (HN-260 board) → ON (Default setting : OFF)

.S1-2 (HN-260 board) → OFF (Default setting : OFF)

.Remove the connector that is connected to the slip ring. Connect the connector of the harness end to the CN9 connector of the HN-260 board.

Adjustment Procedure

1.Turn on the power switch.

2.1RV1 (HN-260 board) → Turn it fully clockwise. (MIN)

3.Press S3 (HN-260 board) twice (within a second/ pressing). Check that D11 (HN-260 board) turns on.

4.Insert the alignment tape (ZR2-1/1P) and reproduce

the 4 MHz signal (TIME : 00 : 00 : 00 to 14 : 59 : 29). n

Do not reproduce the 15 minute segment and later of the ZR2-1/1P alignment tape.

5.Press S2 (HN-260 board) for one second and longer, and remove your hand from S2. The automatic PG phase adjustment mode starts. (The automatic PG

phase adjustment takes several seconds.)

. PG phase adjustment

6.When the automatic PG phase adjustment ends with success, the alignment tape is automatically ejected. (Wait another 10 seconds or longer before turning off the main power.)

When the automatic PG phase adjustment ends with fail, the VTR enters the STOP mode. Then repeat the automat- ic PG phase adjustment from step 1 to step 3 once again. If the automatic PG phase adjustment still ends with fail, perform the MANUAL PG phase adjustment as described in the subsequent paragraph. (Refer to Section 6-3-3.)

Setting upon Completion of Adjustment

.S1-1, S1-2 (UDR-9 board) → REC (OFF)

.S2-1, S2-2 (UDR-9 board) → REC (OFF)

. S4 (HN-260 board)

→ REC

. S1-1 (HN-260

board)

→ OFF

. S1-2 (HN-260

board)

→ OFF

.Re-connect the connectors to the original connections.

6-4

6-3-3. MANUAL PG Phase Adjustment

Note

Perform the MANUAL PG Phase Adjustment only when Section “6-3-2. Automatic PG Phase Adjustment” does not end with success by all means.

Preparation

 

. S1-1, S1-2

→ TEST (ON)

(UDR-9 board)

(Default setting : REC (OFF))

. S2-1, S2-2

→ TEST (ON)

(UDR-9 board)

(Default setting : REC (OFF))

.S4 (HN-260 board) → TEST (Default setting : REC )

.S1-1 (HN-260 board) → ON (Default setting : OFF)

.S1-2 (HN-260 board) → OFF (Default setting : OFF)

.Connect the 8-pin connector of the TP tool for tape path adjustment to CN7 connector on the HN-260 board.

.Connect the 5-pin connector of the TP tool for tape path adjustment to CN3 connector on the CTL-10 board.

.Remove the connector that is connected to the slip ring. Connect the connector of the harness end to the CN9 connector of the HN-260 board.

.Connect an oscilloscope to the TP tool as follows: CH-1 : RECRF A

CH-2 : PGADJREF

TRIG : RECRFCF

Adjustment Procedure

1.Turn on the power switch.

2.Press S3 (HN-260 board) twice (within a second/ pressing). Check that D11 (HN-260 board) turns on.

3.Insert the alignment tape (ZR2-1/1P) and reproduce

the 4 MHz signal (TIME: 00:00:00 to 14:59:29). n

Do not reproduce the 15 minute segment and later of the ZR2-1/1P alignment tape.

4.Measuring equipment : Oscilloscope

Measurement point : TP tool board for tape path

 

adjustment

 

CH-1

: RECRF A

 

CH-2

: PGADJREF

Adjustment control :

1RV1 (HN-260 board)

Specifications :

A=4.2 ± 0.5 usec

CH-1

A

CH-2

 

 

 

 

 

 

 

 

 

CH-1=0.5 mV

TIME=2 msec

CH-2=5 V

 

DVW-790WS/709WS/707

 

 

 

DVW-790WSP/709WSP/707P P2V1

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Sony DVW-790WS/790WSP, DVW-709WS/709WSP manual Automatic PG Phase Adjustment, Manual PG Phase Adjustment