Jvc QLF 61 Service Manual

Page 2

Contents

Page Page
. Specification ........................... 1 7-(5) Lead-in Adjustment ................ 10
. Names of Controls and Their Function .......... 2 7-(6) Tracking Force Adjustment ........... 11
. Operation of Automatic Mechanism ............ 3 7-(7) Motor RPM Adjustment .............. 11
3-(1) Mechanism ....................... 3 7-(8) Quartz Lock Adjustment ............. 11
3-(2) Start/stop Mechanism ................ 3 7-(9) Pitch Control Mechanism Adjustment ..... 11
3-(3) Lead-in Mechanism .................. 4 8. Block Diagrams ........................ 12
3-(4) Change Cycle Start Mechanism .......... 5 9. Connection ........................... 12
3-(5) Repeat Operation ................... 5 10. Printed Circuit Board Ass'y and Parts List ....... 13
. Exploded Views and Parts List ............... 6 10-(1) TXX-343A LED P.C. Board Ass'y ....... 13
4-(1) Mechanism Assembly ................ 6 10-(2) TPS-309CIPower Supply P.C. Board Ass'y . . 13
4-(2) Tonearm Assembly .................. 8 10-(3) MC-94486 Motor Driver P.C. Board Assy . . 14
4-(3) Mechanism Base Assembly ............. 8 11. Packing Materials and Part Numbers ........... 15
5. Disassembly ............................ 9 12. Power Cord Connections in Different Areas ...... 16
5-(1) Removal of Mechanism Base Assembly ..... 9 12-(1) How to Handle the Solderless Connector . . . 16
5-(2) Removal of Tonearm Assembly .......... 9 13. Parts List with Specified Numbers for
6. Cartridge Replacement .................... 9 Designated Area ....................... 17
7. Adjustment Procedures ................... 10 14. Trouble Shooting ....................... 18
7-( 1) Overhang Adjustment ............... 10 14-(1) When Turntable Operation is Abnormal . . . 18
7-(2) Anti-skating Adjustment ............. 10 15. OL-F61 Schematic Diagrams ................ 20
7-(3) Tonearm Lifter Height Adjustment ...... 10 16. Accessories List ........................ 22
7-(4) Lead-out Adjustment ............... 10
[ Warning: When replacing the parts marked with A , be sure to use the designated parts to ensure safety.
CHECKING YOUR LINE VOLTAGE (For U.S. Military Market and Other Countries) _\
Before inserting the power plug, please check this setting to see that it corresponds with the line voltage in 5
your area. If it doesn't, he sure to adjust the voltage selector switch to the proper setting before operating this I. /'

equipment. The voltage selector switch is located either undernearth the platter on the cabinet.
CAUTION Before selecting the "Voltage selector switch" to proper voltage disconnect the power plug.

1 . Specifications

MOTOR AND TURNTABLE

Type Quartz Locked Fully-Automatic
Turntable

Drive Motor Coreless DC servomotor

Speeds: 33-1/3 and 45 rpm

Wow and flutter: Less than 0.025% (WRMS), 0.015%
(WRMSY 0.04% (DIN)
Signal to Noise Radio: More than 75 dB (DIN-B)

Speed Adjustment

Range: More than i6%
Platter: 295 mm (11-5/8") Diameter
Die-cast aluminum alloy
TONEARM
Type: Statically balanced straight tubular

arm with JVC developed T.H.
(Tracing-Hold) balancing system
and tracking force dial in 0.1 gram
steps.

Effective Arm Length: 220 mm

Tracking error: +3°35' -0°43'

Overhang: 15 mm
Tracking force range: 0 - 3 9
Weight range: 8.5 ~ 12 9

(including headhsell)

CARTRIDGE (not provided on units for U.S.A., Canada
and the U.K.)
MODE L: 2-15

Type: Moving Magnet (MD-1025)

OL-F61

No. 2560 _

Stylus tip:
Optimum tracking
force:

Output:

Frequency response:

Separation:

Load Impedance:

0.6 mil. diamond (DT-Z1S)

1.75 t 0.25 grams

3 mV (IkHz)

10 to 25,000 Hz

More than 25 dB (1 kHz)

(with test record TRS-I)
47 k ohms - 100 k ohms

Compliance: 10 x 10'6 cm/dyne (Dynamic)
30 x 10'6 cm/dyne (Static)

GENERAL

Power Source: See page 22

Power Consumption: See page 22

Dimensions:

Weight (NET):

IHl4-1/2" x (W)16o9/16 x (D)14"
(H)115 x (W)420 x (D)355mm
(with cover closed)

(Since the dimensions show only
the design measurements, consi-
deration is required when inst'all-
ing the unit in a limited space such
as a rack).

12.1 lbs. (5.5 kg)

(without corrugated cardboard
case)

*Measured at attached encoders output by K & K measur-

ing method.

Design and specifications subject to change without notice.