Pioneer CTF-950 Service manual
efiic
CASSETTE TAPE DECK
n
MODEL
I
Type
CT-F950 COMES
I
IN
Voltage
SIX
VERSIONS
DISTINGUISHED
I
AS
FOLLOWS:
Remarks
I
I
I
KC
I
HE
I
HB
D
DIG
0
This service manual
refer to the additional service manuals
1
I
I
AC
120vonly
AC 120v only
AC 220V and 240V (Switchable)
AC 220V and 240V (Switchable)
AC 120V. 220V and 240V (Switchable)
AC 120V. 220V and 240V (Switchable)
is
applicable to the CT.F950/KU . For servicing of the other types. please
.
I
U.S.A. model
I
Canada model
1
Europe model
I
United Kingdom
General export model
U.S. Military model
model
CONTENTS
1 . SPECIFICATION
2
.
FRONTPANEL FACILITIES
.
LEVEL DIAGRAM
3
4 . DISASSEMBLY
.
PARTS LOCATION
5
6
.
BLOCKDIAGRAM
.
CIRCUIT DESCRIPTIONS
7
7.1 Recording and playback circuit
7.2 Tape selector circuit
7.3 Level meter
7.4 Electronic counter 16
7.5 Dolby NR processor circuit 17
7.6 Control circuit
7.7 Mutingcircuit
.
MECHANICAL ADJUSTMENTS 12.1 Miscellaneous parts
8
8.1 Pinch roller pressure adjustment
8.2 Tape speed adjustment
8.3 Tape guide adjustment
9 . ELECTRICAL ADJUSTMENTS 12.5 Mother assembly (RWX-359)
9.1 Head azimuth adjustment
9.2 Playback equalizer adjustment
9.3 Playback
9.4 Level meter OdB adjustment
9.5 Approximate adjustment
9.6 Erasure current adjustment
9.7 Bias trap adjustment 33
9.8 Approximate adjustment
recording current
recording bias
.....................
.............
....................
......................
...................
...................
.......
..............
....................
...............
.........
..................
..................
......
............
.............
...........
.......
level
adjustment
..........
.........
of
.................
..........
..............
..................
of
3 9.9 Recording equalizer and variable
4
6
8
11
13
15
15
16
18
27 PATTERNS AND PARTS LIST
30 12.2 Connection diagram
30 12.3
30
31 12.6
32 12.7 Sensing assembly
32 12.8 Indicator assembly
32 12.9
33
33
9.1
9.1 1 Recording
9.12 Output
9.13 Recording dolby
9.14 Playback dolby NR adjustment 36
.
PACKING
10
.
EXPLODED
.
SCHEMATIC DIAGRAMS
12
.
34
.
13
equalizer adjustments
0
Recording and playback frequency
response adjustment 34
level
level
adjustment
..........................
11.1 Exterior
11.2 Mechanism assembly 45
11.3 Panel stay 48
Schematic diagram
12.4 Function switch assembly
Volume assembly
Indicator amplifier assembly
12.10 Integrated amplifier assembly (RWX.360) . 71
12.1 1 Power supply assembly(RWR.067)
12.12 Control assembly(RWG.103)
12.13
12.14 Tape selector assembly
12.1
TROUBLE SHOOTING
REC
5
Fuse assembly
......................
.....................
EQassembly(RWX-361) 81
.............
..............
adiustment
............
NR
adjustment
..............
P.C.
BOARD
list
............
..............
...............
................
................
...............
..................
.................
......
......
.......
..........
.........
(RWX-328) . 67
.....
.........
........
.......
.....
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I
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I
34
35
36
36
41
42
50
51
54
57
58
63
63
64
73
77
83
84
85
1.
SPECIFICATION
CT-F950
Systems
Motors..
............
...........
Compact cassette, 2-channel stereo
Capstan drive; DC servo motor
Reel drive; DC high torque motor x 1
Heads
.........................
phyback combination
Ferrite recording/
type
head
Praqing head
Fast Winding Time.
Wow and Flutter
..........
.........
Approximately
85
seconds
(C
-
60 tape)
No more than 0.04% (WRMS)
Frequency Response
-20dB Recording
Standard, LH tapes
..............
20
to 17,000Hz
(25 to 15,000Hz * 3dB)
Ferrichrome tape
...............
Chromium dioxide tape
(25
...........
20 to 19,000Hz
to
17,000Hz 2 3dB)
20 to 19,000Hz
(25 to 17,000Hz t 3dB)
Metal tape
...................
.20 to 19,000Hz
(25 to 18,000Hz t 3dB)
OdB Recording
Chromium dioxide tape
Metal tape
Signal-to
...................
-
Noise Ratio. . Dolby NR OFF; More than 59dB
...........
20
to 11,000Hz
.20
to 14,000Hz
Dolby NR ON; More than 69dB
(over 5kHz)
Harmonic Distortion
.........
No more than 1.2% (OdB)
Inputs (Sensitivity/Maximum allowable input/lmpedance)
MIC (L, R); 0.3mV/100mV/30kilohms, 6mm diam.
jack (Reference MIC impedance; 250 ohms to 30
ohms)
LINE
x
2; (60mV/25V/100 kilohms) Pin jack
Outputs (Reference
x
LINE
2; (450mV/640mV/50 kilohms) Pin jack
HEADPHONES x
level/Maximum level/Load impedance)
1
;
63mV/90mV/8 ohms, 6mm diam.
jack
Semiconductors
.....................
Transistors x 76
Diodes x 84, Photo interrupter
Su bfunctions
ICS
Dolby NR system (ON-OFF) with LED indicator lamp
Fluorescent tube level meter
(-20
to +7dB)
(Peak/Peakhold/average selector)
Fluorescent tape counter
Bias fine adjusting control knob
Memory stop/Memory play
Counter repeat/End repeat
0
Input selector
0
Automatic tape slack canceller
0
Cassette compartment illumination
Standby mechanism with unattended recording
0
Tape Selector 4 position.
0
Click Stop. Output VR.
x
x
x
x
kil-
x
13
Power Requirements
1
1
1
Power Consumption
Dimensions
Weight
......
.........................
Furnished parts
................. AC 120V 60Hz
......................
.420(W) x 187(H) x 365.5(D)mm Max.
16
-
9/16 x 7-3/8 x 14-318 in.
.\O.\kg
Stereo connecting cords
Head cleaning swabs
Operating instructions x
.54 watts
{22\b
4ozz.)
with
pin plugs x
2
x
3
1
NOTE:
Specifications and the design subject to possible modifi
-
cation without notice due to improvements.
NOTES:
1. Reference Tapes: Standard
equiv.
:
2. Reference Recording Level: Meter
nwb/m magnetic level = Philips cassette reference level)
3. Reference Signal:
4. Wow
5.
6. Signal
7.
8.
9.
10.
81
Flutter:
(weighted), rms value]
Frequency Response: Measured at -20dB level, DOLBY
NR
OFF,
level deviation
to
Noise Ratio: 0 Measured at the third harmonic distor
tion 3% level, weighted.
Sensitivity: Input level (mV) required for reference recording
level with input
Maximum Allowable Input: While decreasing settings of input
(REC) level controls and increasing level at input jacks, this
the
maximum
amplifier output waveform becomes clipped.
Reference Output Level: Playback output level when meter
indicates
Maximum Output Level: Playback
reference recording level when
are
set
OdB.
to
maximum.
CrO,: DIN 45513/BLATT7(Cr02 )or equiv.
333Hz
(REC)
input
&
LH: DIN 45513/BLATT6 or
OdB indicating level (160
JIS
[BkHz, with acoustic compensation
is
26dB without indication.
controls set
level (mV) at the point where recording
to
maximum.
output
output
level with respect
(PLAY) level controls
-
is
to
1
420(W) x 187(H)x 365.5(D)mm Max.
with rackmount adaptor JA-R102
480(W) x 187(H)x 380(D)
mm
Max,
Unit:
mm
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