3-3
3.3 MECHANISM ADJUSTMENT
3.3.1 TAPE TRANSPORT ADJUSTMENT
Mechanism adjustment is needed when DRUM ASSEMBLY or a
part of the tape transport system is replaced. To protect tapes
from damage, first clean the tape transport system, next confirm
that nothing is wrong with the tape transport system by using a
tape that can be disposed of, and then perform adjustment with
alignment tape. Some exterior parts should be removed before
some adjustment procedures, depending on the procedures.
Fig.3-3-1
3.3.2 Back tension
Remove the exterior parts attached to CASSETTE HOUSING
ASSEMBLY so that scales of CASSETTE TORQUE METER can
be read.
• CASE COVER(S),(M) ASSEMBLY
• C. COVER INSIDE
Fig.3-3-2
(1) Set a cassette torque meter onto the deck and measure the
back tension in standard PB mode to confirm that the back
tension is 0.97x10
-3
- 1.71x10
-3
N•m.
(2) If not, replace the tension band.
When the value widely fluctuates in the measurement,
replace the SUPPLY REEL DISK.
(3) With the CASSETTE TORQUE METER, confirm that the
play torque is 1.47x10
-3
- 2.45x10
-3
N•m.
If necessary, replace the center pulley unit.
POLE BASE (SUP)
(GUIDE ROLLER)
POLE BASE (TU)
(GUIDE ROLLER)
PINCH
ROLLER
TU GUIDE
A/C HEAD
ASSEMBLY
TENSION
POLE
POLE
CASSETTE TORQUE METER
10.Light box assembly
To be used for adjustment of the camera system. For the us-
age of the Light box assembly, refer to the Service Bulletin No.
YA-SB-10035.
11.Camera stand
To be used together with the INF adjustment lens holder. For
the usage of the Camera stand, refer to the Service Bulletin
No. YA-SB-10035.
12. Jig connector cable
To be connected to the Jig connector jack of the main board
and used for measurement and adjustment.
Fig.3-2-2
13.Communication Cable
Connect the Communication cable between the PC cable and
Jig connector cable when performing a PC adjustment.
14.Service support system
To be used for adjustment with a personal computer. Software
can be downloaded also from JS-net.
15.PC cable
To be used to connect the Videocamera and a personal com-
puter with each other when a personal computer issued for ad-
justment.
16.Cleaning cloth
Recommended the Cleaning cloth to wipe down the video
heads, mechanism (tape transport system), optical lens sur-
face.
MAIN CN25
JIG BOARD (LABEL)
AL_L3.2V
1
1
AL_L3.2V
MCU_RST
11
2
BATT+
BATT+
2
3
BATT+
V_TP_FM
12
4
C_OUT
BATT+
3
5
DIAL_PB
V_FF
13
6
Y_OUT
C_OUT
4
7
GND
PB_CTL
14
8
GND
DIAL_PB
5
9
GND
REG_4.8V
15
10
V_OVL
Y_OUT
6
11
MCU_RST
AO_SIG_J
16
12
V_TP_FM
GND
7
13
V_FF
TXD
17
14
PB_CTL
GND
8
15
REG_4.8V
RXD
18
16
AO_SIG_J
GND
9
17
TXD
JIGCN_SW
19
18
RXD
V_OVL
10
19
JIGCN_SW
VPP_7.8V
20
20
VPP_7.8V
