JVC QL-A2 Service Manual

13. TXX-124 Schematic Diagram
NJM4558D-D
SM6415A-4S,
NJM4558D
2S€945 (P,Q)
2SA733 (P,Q)
2SC1775A(F7)
250571 (L,K)
250325 (D,E)
SIBOI- 02
SR103C
X.TAL
182473
[mro36a(QL-az)]
mM-938B(QL-F4)
DOMESTIC (TXX-124)
Mxx 124A
A B
[Txx-126-s) «|
SPEED SELECT. SW, S1 |
33 W3rpm.
C801
10n /16V
1€801
1¢802
1C803
R603 1K
X803, X814, X816, X817 Oofttg
X01, X804, X805, X806, X807 Cabs
x813, X816
X802, X809, XB10, X811, X812
XB15
Wave from
1¢801
| FG Amp
FH om
O46}
1 Shaper
Oscillator / Fregency divider
F-V, P-D IC SM6415A-~4S
0810, 0811, 0812, 0813
D804, 0805, 0806, D807, 0808
£04300-004
0801, 0802, 0803 10ms
|
|
|
|
|
x808 | aml 2sv [+
|
|
|
|
|
+
ceoz
F rowley
= R810
47K cB05 =
0.022
C813 10u/16V)
R817 160K
Wy—4-
R818 330K
| ay ———}
REID yp.
z ion Te?
Re15
3.3K
| fe
RE47
IK OI2W)
From Cartridge
|
=e
R839
390
(»
X805 x8
X809 X810
Y '©)
X807 X808
O
XBi1 XB12
= |
TONE-ARM SHIELD COVER of _J | \
Signal circuit of QL-A2
Printed Circuit Board Ass’y Location
P.C. Board Ass’y
Description
TXX-124
Res!
2.7(W)
4.5V
A
Warning !
yet!
823
220u/S0V
473/50V
EE &EA(for Europe & Australia)
axx-124€] oe
AAA on
AY)
L 0.445
™
SOPSTRANS,
1. Be careful not to allow metallic dust, etc. to enter
inside the unit, be cause its motor is comprised of
magnetic elements.
NJM4558D, MJM4558D-D
1¢801, 1C803
SM6415A-4S
2SA733 2SC945 2SC1775A
X801, X803, X804, X805
X806, X807, X808, X813
X814, XB16, X817, X818
280571
B
XB02 X809 X810 X81)
xX812
250325 S1B01- 02
0810, D811, D812
0813
OLTAGE SELECTOR
E Fs
ie
B
Notes:
1. The voltage indicated in[-_] is measured
by a tester having an internal impedance
of 33.k2/V.
© (_] 33-1/3 rpm
© (_) 45 rpm
[ ] When locked
2. X809 through X812 should be of the
same rank.
(There are four different rankings avail-
able on the market as follows:
2SD571 K1,K2,L1 and L2
Be sure to use only one rank of those
transistors being replaced.)
3. When replacing either of these transistors
2SC1775A(F7), X813 or X818, they
should be replaced together as a pair both
being of the same rank.
4. —— indicates positive B power supply.
5. =—— indicates signal path.
6. When replacing the parts in the dark-
ened area and those marked with
A , be sure to use the designated parts
to ensure safety.
7. This is the standard circuit diagram.
The design and contents are subject to
change without notice.
NJM4558D, MJM4558D-D
1
3209
yy pate
42
1CB01, 1C803 hy
1802
254733
2SC945
2SC1775A
2SD571
SM6415A-4S
} DIAGRAM Mov
SR103C 192473
D804, 0805, D806
0807, D808
D801, D802, 0803
[-vout. [| nov [r2ov
[CONNECTION] 1-5, 2-6] 3-6,4-1
E F
2. After replacement of the X813 transistor, apply
KE45RTV (silicone adhesive) or an equivalent
material around the transistor for thermal con-
duction.
— 16 —
X801, X803, X804, X805
c
B
X802 X809 X810 x811
X806,
X807,
X808,
X813
X812
X814,
X816,
X817,
X818
280325
SIBO1-02
A
X815
0810,
DB11,
DB12
0813
SR103C
182473
K
A
A
K
0804,
D805,
D806
0801,
D802,
D803
0807,
D808
QL-A2
No. 2444

JVC QL-A2 Specifications

General

Drive System	Direct Drive
Motor	DC servo motor
Speeds	33 1/3 and 45 rpm
Platter	Aluminum die-cast
Wow and Flutter	0.03% WRMS
Effective Length	220 mm
Overhang	15 mm
Tonearm	Static balance S-shaped tonearm