Mechanism Adjustment; Service Cautions; Precautions; How To Read The Disassembly And Assembly (For Mechanism Parts) - JVC GR-AXM236U Service Manual

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 assy and tape transport
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.
(For Mechanism Parts)
STEP/LOC.
No.
1
ROLLER BASE ASSEMBLY
2
TENSION ARM ASSEMBLY
3
REEL DISC (SUP)
(1)
SECTION 2

MECHANISM ADJUSTMENT

Fig.
PART
No.
T M 1
T M 1
T M 1
(2) (3)
2.1.3 Required adjustment tools
Alignment tape
1
MHP-C
Jig connector cable
3
YTU93106A
Cassette torque meter
5
PUJ50431-2
Table 2-1-1
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 cheek 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.
REMOVAL
*UNHOOK/UNLOCK
/RELEASE/UNPLUG
/UNSOLDER
(S1)
(P1), (W1a)
(W1a), (W1b)
(4) (5)
Alignment tape
2
MHP-LC
Extension connector
4
YTU94145B-30
Roller Driver
6
PTU94002-2
INSTALLATION
ADJUSTMENT
CONDITION
NOTE
–
–
_
(6)
2-1