Cue/Tc Output Level Check - Sony HDW-750 Maintenance Manual

8-2. Tape Run System Adjustment

8-2-9. CUE/TC Output Level Check

Tools
. Alignment tape HR2-1A : 8-960-076-11
. HN-255 assembly :
. Oscilloscope
Preparations
1. Turn off the main power.
2. Remove the shoulder pad and the plate.
3. Connect the HN-255 assembly to the MDC-
13 board.
5-pin connector on the HN-255 assembly :
CN902/MDC-13 board
8-pin connector on the HN-255 assembly :
CN903/MDC-13 board
4. Connect an oscilloscope.
CH-1 : PB CUE/Circuit board on the HN-255
assembly
TRIG : CH-1
5. Turn on the main power.
6. Insert the alignment tape HR2-1A.
Check Procedure
1. CUE output level check
(1) Play back the alignment tape HR2-1A (from
15 : 00 to 25 : 00).
(2) Confirm that fluctuation of the CUE output
level satisfies the specification 1.
(3) Play back the alignment tape HR2-1A (from
00 : 00 to 15 : 00) in PLAY state.
(4) Take note of the CUE output level. (Level at
this state is named C.)
(5) Enter the REV x 1 state.
(6) Confirm that fluctuation of the CUE output
level (level at this state is named D) satisfies
the specification 2.
(7) When the specification 2 is not satisfied :
. When the tape guide has no lower flange,
perform the T3 and T5 tape guide height
adjustment. (Refer to Section 8-2-1, tape
guide height adjustment [A] )
. When the tape guide has the lower flange,
perform the T3 tape guide height adjust-
ment. (Refer to Section 8-2-1, tape guide
height adjustment [B] )
How to enter the REV x x x x x 1 mode
(1) Set the x 1 REV SEARCH to ON using the
VTR maintenance menu, A40 : PATH
MODE SEL.
(2) After pressing the PLAY button, press the
REW button. (Both the PLAY and REW
buttons on the keyboard turn on.)
8-46
A-8315-553-A
P2 x 4
Screws
(with drop-safe)
Shoulder pad
A B
B _ A
Specifications 1 :
A
D
Specifications 2 : x 100 > 70 %
C
Plate
x 100 < 5 % (fluctuation)
HDW-750/750CE V1