Sony TC-V3 - Page 7

TC-V3
SECTION 3 | | | :
ADJUSTMENTS
ooh. MECRANIEAL AD USTMENTS 3-2. ELECTRICAL ADJUSTMENTS
PRECAUTION
Record/p:
Capstan Motor Speed Adjustment
Clean the following parts with a denatured- 3. Do not use a magnetized screwdriver for the
alcohol-moistened
swab:
adjustments.
Procedure:
Procedur:
record/playback
head
pinch
roller
After
the
adjustments,
apply
suitable
locking
Note:
The
adjustment
should
be
performed
in
Mode:
playback
rs
Mo,
erase
head
rubber
belts
compound
to
the
parts
adjusted.
the
order
given
in
this
service
manual.
.
test
tai
capstan
idlers
;
The
adjustments
should
be
performed
P-4-AC
The
adjustments
should
be
performed
with
th
p 1 e€ for both L-CH and R-CH. 1 (6.3kk
Demagnetize
the
record/playback
head
with
a
rated
power
supply
voltage
unless
otherwise
speed
checker
:
head demagnetizer. noted, ® Set the TAPE switches according to the tape as pres
follows. digital frequency.
test tape counter :
WS-48
v
Head Height Adj LE | Se eae
ea eight stment i D disp! i
g jjustmen Torque Measurement Tape | TAPE SELECT switch isplay ) Tu:
: CS-15 AUTO I: NORM '
1. Prepare an adjustment cassette as shown below, r - out
: Torque Torque meter Meter reading CS-25. AUTO If: CrO,
or mirror cassette. set [CO the
30~55
g-cm
CS-30
Fe-Cr
(METAL)
Ili:
Fe-Cr
|
pee eee (0.41~0.69 oz+inch) AUTO : as
: arr CS40 | Fe-Cr (METAL) MET a | i dd
Back Tension CQ-102C (0.03~0.06 oz-inch) |
Fast Forward CQ-201B 80~165 g-cm | L-CH
d Rewind 1~2.0 oz+i ® Switc ‘ controls s ? Sent | peak
VD ° 7A BE pane ee (1.1~2.0 oz-inch) ® Switches and controls should be set as follows Specification: |
unless otherwise specified.
;
7
Speed
checker
Digital
ital
frequency
counter
|
counter
C-120 Cut out hatched . DOLBY NR switch: OFF
tape cassette tions. Pinch Roller Pressure Measurement ee _0.8~4
portions. DOLBY B/C switch: B 0.8~+0.8% —__2,975~3,025Hz 975~ 975 ~3,025H 025Hz
In playback mode and viewing from the front, — Playback Mode — TAPE switch: AUTO (I: NORM) : Aa :
adjust the head heights to eliminate tape curl G Sew henieneba TIMER switch: OFF Preaueney-ciitgence Deiween Hie beginning Serew *
, ; 'o et ? ithi : ition °
and tape twist at the portions shown by the bode oy ie oo Sole fuse wher . and the end of the tape should be within 0.8% position -
apna
the
pinch
roller
starts
rotating.
@
Standard
Record:
(25Hz).
i
:
(The
capstan
should
:
|
F
first contacts here.) Deliver the standard input signal level to the at icactent tes ation: | aE
input jack and set the REC LEVEL control to J , | Mc
obtain the standard output signal level. | pod
| ae
pinch Standard Input Level i (6.3k
roller | a
erase head record /play back Mic LINE IN | fi
head : -
source impedance 3002 | 10kQ XQ
@
tension
gauge
input
level
0.77mV
(—60dB)
|0.25V
(—10dB)
:
200~300 gem A
3-513-237-01
(t=0.1)
(2.77~4.16
oz-inch})
|
NG
3-513-237-11
(t=0.2)
Standard Output Level
Shim, head height adjustment
HEADPHONES | LINE OUT
82 | 47ka
3lmV (—26dB) _[0.435V (—5dB)
load impedance
Soft Eject Time Adjustment
|
output
level
Specification
0.4~2.5 sec.
Set the tape (C-90) and adjust
the adjustment screw for the
nS Son eee
specification. 5
fast (DS slow
adjustment screw
Adjust the speed by using sctewdriver. When
turning the screw clockwise, speed is faster.