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@ ELECTRICAL PARTS LIST
teristics important for safety.
turer's specified parts.
Area
* [EK] United Kingdom.
* [EGA] F.R. Germany.
Prat [ ano [pene ncn
INTEGRATED CIRCUITS
Ic 1
AN7014K
Integrated Circuit
IC 4
M5218L
Integrated Circuit
IC 401, 402
TEA0665
Integrated Circuit
IC 700
AN6888
TRANSISTORS
Q1,2
2SA1309AQS __ Transistor
Q3,4
2SJ103Y
FET
Q 13, 14, 15, 16, 17, 18
28C3311AQS
Transistor
Integrated Circuit
Q 21,22
28J103Y
FET
[EGA] only
Q 23,24
2SD1330R
Transistor
Q 300, 301
2SC3311AQS
Transistor
Q 600
2SD592ARS
Transistor
Q 601
2SB621ARS
Transistor
Q 800
2SA1309AQS ___ Transistor
Q
2SD592ARS
Transistor
900
DIODES & RECTIFIERS
D1,2
MA165
Diode
D5,6
MA165
Diode
[EGA] only
D 600, 601, 602, 603
1SR35200
Diode
D 604
MA4120-M
Diode
D 701, 702
SLR56YC
LED
D 703, 704, 705, 706, 707, 708
SLRS6URC
LED
D 709, 710, 711, 712
SLRS56YC
LED
D713
LN846RP
LED
D 800, 801, 803, 807
MA165
Diode
VARIABLE RESISTORS
VR1,2
EVND4AA00B24
P.B. Gain Adj. VR
VR 3,4
EVND4AA00B54
Overall Gain Adj. VR
VR 200
EWCS5SA000A54
Input Level Control
VR 201
EWHFDAF15G15 Balance Control
TRANSFORMERS
T 300
SLO9C19-K
Bias Oscillation Coil
T 600
[EK] A SLT5K236SA
AC Power Transformer
T 600
[E]
l
[EGA]
[EGA] A. SLT5K235SA
AC Power Transformer
Paavo [verve
SWITCHES
VR 301, 302
S$ 1, 800, 801
EVND4AA00B15 Bias Current Adj. VR
SSH3087
S 200, 201
SSH3700
L1,2
QLQX0343KWA
Bias Trap Coil
L 401, 402
$600
A SSH1069
QLM9Z10K
MPX Coil
L 403, 404
$s 900
SSP83
ELM7Q306A
Skewing Network Coil
S$ 901
SSP83
S$ 902
SSP83
only QJS2003H
QJA0454Z2C
QJA04552C,
Push Switch
(Line/Mic Selector/
Dolby NR IN/OUT Selector/
Dolby B/C NR Selector)
Push Switch
(Metal/CrO, Tape Selector)
SPECIFICATIONS _ * Input level control ...MAX
Push Switch
(Power ON/OFF Selector)
Playback S/N ratio
Leaf Switch
(Motor Switch)
Leaf Switch (Play Switch)
Leaf Switch (Mute Switch)
Part Name & Description
Mic Jack
Headphones Jack
DIN Jack
m@ SCHEMATIC DIAGRAM
Notes:
(This schematic diagram may be modified at any time with the develop--
ment of new technolgy.)
% This is the basic circuit diagram of this unit.
Note that part of the circuit is subject to change depending on the
areas.
¢ $1-1~S1-4
: Line/mic select switch in "line" position.
e $200, S201
: Tape select switch in "Normal" position.
(S200 =: Metal, $201 =: CrO2, $200, $201 : Normal)
e $600
: Power switch in "on" position.
e¢ $800
: Dolby NR in/out select switch in ''out" position.
e $801
: Dolby B/C NR select switch in "B" position.
¢ $900
: Motor switch in "off" position.
¢ $901
: Play switch in 'off' position.
e $902
: Mute switch in "off" position.
¢ Resistance are in ohms (Q), 1/4 watt unless specified otherwise.
1K=1,000(Q),
1M=1,000k(Q)
© Capacity are in micro-farads (uF) unless specified otherwise.
e All voltage values shown in circuitry are under no signal condition and
playback mode with volume control at minimum position otherwise
specified.
Voltage values at record mode.
.Voltage values at CrO2 tape mode.
.Voltage values at Metal tape mode.
B....
.Voltage values at Dolby
B NR mode.
c
....Voltage values at Dolby C NR mode.
For measurement use EVM.
e
(————_)
indicates B (bias).
E
) indicates the flow of the playback signal.
* (<>)
indicates the flow of the record signal.
¢ Important safety notice A
The shaded area on this schematic diagram incorporates special features important
for protection from fire and electrical shock hazards.
When servicing it is essential that only manufacturer's specified parts be used for
the circuit components in the shaded areas of the schematic.
* Caution |!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
* Cover the parts boxes made of plastics with aluminum foil.
%* Ground the soldering iron.
%* Put a conductive mat on the work table.
* Do not touch the legs of IC or LSI with the fingers directly.
@ EQUIVALENT CIRCUIT
1C700: AN6888
* Test tape...QZZCFM
Overall distortion
* Test tape
...QZZCRA for Normal
...QZZCRX for CrO,
...QZZCRZ for Metal
Overall S/N ratio
* Test tape...QZZCRA
Less than 3.5%
CrO2, Metal
Less than 4%
Greater than 43dB
(without NAB filter)
1
2
3
4
5
Ei MAIN CIRCUIT SECTION
AW
'O—Y
Rt 22K
$1-2
$1-4
S1-1
$1-3
LINE IN
( )
line <> mic
line «> mic
line <> mic
line <> mic
OX
1
559 5So | 9So SS¢
||
am
a)
Ez
MIC
ob | .
%
peee
ger See
4
SS
=
C10 = R24
1200P 100
Q3, 4
28J103Y
HEAD SELECT
Bias Current Adj.
a
Play SW
Mute SON with"
c40
0.0012
L2
R70
30mH
10K
ui
R69
30mH
10K
7
C39
330P
0.0012
ae
Bias
Current Adj.
5.
R49
0.0082
27K
2.7K
C31
0.0033
VR301
100K(B)
VR302
=
100K(B)
R50 2.7K
Q15--18
2SC3311A
TAPE SELECTOR
t=)
0
ie
Metal:0.7
0
Metal:0.7
(Ds
Metal:0.7
R815 10K
R816 10K
2SC3311A
YVO®Q
OO®@
Y © @
YO © @
7300
R200 220
R201 BS
R202
10
C303
0.0033
Ly
EHEAD
>< ) toy
@
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