2-1
SECTION 2
MECHANISM ADJUSTMENT
2.1 SERVICE CAUTIONS
2.1.1 Precautions
1. Before disassembling/re-assembling the set as well as
soldering parts, make sure to disconnect the power ca-
ble.
2. When disconnecting/connecting connectors, pay enough
attention to wiring not to damage it.
3. When installing parts, be careful not to do with other parts
as well as not to damage others. (Pay the most careful
attention to the upper drum assembly and tape trans-
port mechanism.)
2.1.2 How to read the disassembly and assembly
(For Mechanism Parts)
(1) Order of steps in Procedure
When reassembling, perform the step(s) in the reverse
order. These numbers are also used as the identifica-
tion (location) No. of parts Figures.
(2) Part to be removed or installed.
(3) Location of part.
T = Top
B = Bottom
(4) Fig. No. showing Procedure or Part Location.
M = Mechanism
(5) Identification of part to be removed, unhooked, un-
locked, released, unplugged, unclamped or unsoldered.
P = Spring
W = Washer
S = Screw
* = Unhook, unlock, release, unplug or unsolder.
(6) Adjustment information for installation.
(+) = Refer to Exploded Views for Lubrication informa-
tion.
Roller Driver
PTU94002-2
Jig connector cable
YTU93106A
Cassette torque meter
PUJ50431-2
Alignment tape
MHP-C
Alignment tape
MHP-LC
Extension connector
YTU94145B-30
1
2
3
4
5
6
1
ROLLER BASE ASSEMBLY
T
M 1
(S1)
–
2
TENSION ARM ASSEMBLY
T
M 1
(P1), (W1a)
–
3
REEL DISC (SUP)
T
M 1
(W1a), (W1b)
_
(1)
(2)
(3)
(4)
(5)
(6)
(For Mechanism Parts)
STEP/LOC.
No.
PART
Fig.
No.
REMOVAL
INSTALLATION
*UNHOOK/UNLOCK
ADJUSTMENT
/RELEASE/UNPLUG
CONDITION
/UNSOLDER
NOTE
2.1.3 Required adjustment tools
1,2. Alignment tape
To be used for check and adjustment of interchangeabil-
ity of the mechanism.
(Video: Color bar signal, Audio: Non-signal)
3. JIG connector cable
Connected to CN25 of the main board and used for
measuring error rates, etc.
4. Extention connector
To be used to JIG connector cable
5. Cassette Torque Meter
This is used to check the back tension and play torque
during mechanism adjustment.
6. Roller Driver
To be used to turn the roller driver to adjustment of the
linearity of playback envelope.
Table 2-1-1
