Table Of Contents - JVC QL-F300 Service Manual

Contents
Page
L.Specifications: 2:::.<.sc:¢ccc¢retssinvdwits ade seein eens 2
2. Operation of Automatic Mechanism .................... 3
2-(1) Start/stop Mechanism ............:cccccceeeeeeeees 3
2-(2) Lead-in Mechanism ..............ccsececeeeee ners eee 4
2-(3) Change Cycle Start Mechanism ................- 4
2-(4) Repeat Mechanism ..............::ccceeeeeeeeeeeeees 5
3. Removal and Reassembly Procedure .................... 5
3-(1) Removal of Cabinet ..................ccceseee seen eee 5
3-(2) Reassembly of Cabinet .................ccceeeneeeee 5
3-(3) Removal of Pickup Base Ass'y ..................5 6
3-(4) Reassembly of Pickup Base Ass'y .............. 6
3-(5) Reassembly of Anti-skating Lever .............. 6
4. Stylus Replacement (DT-551I) «0.0... cccceee cece eens 6
5. Cartridge Mounting ................ceeeceeeee etter eens eeenees 7
5-(1) Removal and mounting of the headsheel ..... 7
5-(2) Mounting Cartridge ............ccceceeeeee seen eee e en 7
Be AGUSIMEN Eis ccisiscivessceieesesd Nes eecsacetcousensereaegece 7
6-(1) Tracking Force Adjustment .............-.:0.20e0 7
6-(2) Overhang Adjustment ................:.ceseeeee eee 8
Page
6-(3) Tonearm Elevator-height Adjustment.......... 8
6-(4) Lead-out Adjustment ................cc cscs eee eee 8
6-(5) Lead-in Adjustment ..............cccceeeseeea nee eees 8
. Exploded Views and Parts List ..............:cceceeeseeeee 9
7-(1) Mechanism Assembly ..............:c:ccsesenenenee 9
7-(2) Tonearm Assembly ............-.:ccseeeeeeeeeeeeeee 10
7-(3) Mechanism Base Assembly .................000008 11
. Printed Circuit Board Ass'y and Parts List.............. 11
8-(1) TXX-437L Power Supply
P.C. Board ASS' ..........ccscseeenseceereceanenneaes 11
8-(2) MC-945B Motor Driver P.C. Board Ass'y .... 12
. Power Cord Connections in Different Areas .......... 13
How to Handle the Solderless Connector ............ 13
10. Accessories List ............cccccecesecese nese ee ee eee eesananes 14
11. Packing Materials and Part Numbers .................+5 15
12. QL-F300 Schematic Diagram ............:c:eceeeeeeeeeeee 16
13. Trouble Shooting .............ccecceee eee eeeeseetenseenenenees 17
14. Parts List with Specified Numbers for
Designated Area ...............cscceeeenseeseeeeens Back Cover
1. Specifications
MOTOR AND PLATTER
Drive system : Quartz locked fully-automatic
turntable
Driver Motor : DC servomotor
Speeds : 33-1/3 and 45 rpm
Wow and Flutter : Less than 0.025% (WRMS),
0.045% (DIN)
Signal to Noise Ratio : Better than 78 dB (DIN-B)
Platter : 12-inch (30 cm) diameter die-
cast aluminium alloy
TONEARM
Type : Statically balnaced straight
tubular arm with JVC
deveioped TH (Tracing Hold)
balancing system and tracking
force dial graduated in
0.1 gram steps.
Effective Arm Length :220mm
Overhang > 15mm
Applicable Tracking
Force Range : Oto 3 grams
Applicable Cartridge : 9.0 to 12.5 grams (including
Weight headshell)
Headshell Weight : 4.5 grams
CARTRIDGE (Except the QL-F300 for U.S.A. and Canada)
Type : Moving magnet (MD10551)
Stylus : 0.6 mil. diamond for DT-55I
Optimum Tracking
Force : 1.75+40.25 grams
Output : 2.5 mV (1 kHz)
Frequency Response : 10 to 25,000 Hz
Separation
Load Resistance
Compliance
: Better than 25 dB (1 kHz)
: 47 kohms
: 25x 10-8cm/dyne (Static)
8 x 10°-cm/dyne (100 Hz
Dynamic)
GENERAL
Dimensions : 43.5(W) x 36.0(D) x 10.5(H) cm
Net Weight : 5.2 kg (11.5 Ibs)
POWER SPECIFICATIONS
Countries
P
Line Voltage & Frequency erie
Consumption
U.S.A. & CANADA AC 120 V, 60 Hz
CONTINENTAL |
EUROPE
AC 220 Vn, 50 Hz
U.K. & AUSTRALIA AC 240 V~, 50 Hz
U.S. MILITARY
MARKET
AC 110/120/220/
240 V~ selectable,
50/60 Hz
OTHER AREAS
AC 110/120/220/
240 V~ selectable,
50/60 Hz
9 watts
Design and specifications subject to
notice.
egy ae
change without
QL-F 300
No. 2650