Pioneer ct 930 service manual

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ORDER NO.

ARP-14 4 -0

MODEL CT-930 COMES IN FOUR VERSIONS DISTINGUISHED AS FOLLOWS:

Type Volume Remarks

KU 120V only UIS.A. model

HP 220V and 240V (Switchable) Australia model

D 120V, 220V and 240V (Swilchablg) Genaral expat! model

DIG 120V, 220V and 240V (kachable) US. military model I
o This service manual is applicable to the KU, HP, D and 0/6 types.
0 Ce manue! dlnstruction se refére au mode de réglage, en fangais.
t Esta manual de servicio trata deI método de ajuste escrlto en espafiol.
I. SPECIFICATIONS ..................... 2 9. ELECTRICAL PARTS LIST ............. . 30
2. FRONT PANEL FACILITIES .............. 3 10. P.C. BOARDS CONNECTION DIAGRAM ..... 35
3. BLOCK DIAGRAM .................... 5 131/ SCHEMATIC DIAGRAM ................. AI
4. CIRCUIT DESCRIPTIONS ................ 8 12. ADJUSTMENTS ...................... 4S
5. DISASSEMBLY ....................... 19 REGLAGE .......................... 53
6. PARTS LOCATION .................... 21 AJUSTE ............................ 61
7. EXPLODED VIEWS AND PARTS LIST ....... 23 ADDITIONAL SERVICE MANUAL
8. PACKING ........................... 30

(for HP, D and 0/6) ....................... 89

PIONEER ELECTRONIC CORPORATION 4n, Maguro «Chan-IQ Maguln-ku, Tokyo 153..Jaonn
PIONEER ELECTRONICS wait] me. 19:25 (2. Elumirlqmaz Sn, Luna Beach. (ta-um "'1 \In 1413:3161 1135A. ,
SIGNEEH ELECTEDNIB [EUBUBEI sz. VlaeLulerzglagfl '4. E7146 Batman, Eulglnm

PIONEER ELECTRONICS AUSTRALIA DTY. LTD. 17E<18¢1 Boundary Road. Braaslde, Victor-In 3155, Australia

Y/ El IUNI Illl) Prim-«I In 1.1mm

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1. SPECIFICATIONS

Systems .............. Compact cassette, 2-channel stereo i'
Heads ....... "Ribbon Sendust" recording/playback head x i
"Ferrite" erasing head x 1
Motor ................. . ..... D.D. servo motor X 3 »
Wow and Flutter ........... No more than 0.045% (WRMSI

Fast Winding Time t . . . .

Frequency Response
-20dB recording:
Norma) tape. .
mmmm tuna ,

. Approximately 90 seconds (060 tape)

-,

. 25 to 15,000H2 (35 to 14,000H223dBI
. . in In l'lllflm-l: (sin In Iminmaim)

Metal tape ....... 25 to lB,OOOHz (30m 17,000H22368)
Ode recording: . .

Chrome tape ..................... 30 to 8,000H2
Metal tape ..... . ....... . ...... 30 to 12,5000Hz

Signal-to-Noise Ratio

Dolby NR OFF ..... . ............. More than 53cm? -"~

Noise Reducrion Effect

Dolby Na ON (E Type) ..... . . . More than 10d3(at5kHz)

Dolby NR ON (C Type) More than leB (at 5 kHz)
Harmonic Distortion .....
Input
(Sensitivity/Maximum allowable input/Impedance)

MIC (L; Fl) ........ 0,3mV/57mV/10kfl, 6mm diam. jack

(Reference MIC impedance1250fl to 10km)

LINE (INPUT) .................. 50mV/25V/75kn.
Output (Reference level/Load impedance)

LINE (OUTPUT) ................... 450mV/50kt'2

Subfunctions

Dolby NR system (B type/C type/OFF)

3 position tape selector (NORM/CrOz [META L)
It: full logic control

Air damp'eiect function

Full automatic stop mechanism

REC muting function

Music search/Skip function

Timer stand-by mechanism

One-touch recording system

LED level meter .

Auto function system

Playback auto reverse. auto repeat functions

............

..... No more than 1.2% (Dual .11.;

'5.

M iscelianeous

Power Requirements ......... . .~ . . . .AC 120V, SOHz

Power Consumption . . , . ................ 41watts

Dimensions .420 (W) x 101 (H) x 235 ID) mm
16- 9/16 (W) x 4 (H) x 91/4 (D) in

Weight (without package) ............. 5.25 kg (~11 lb 9 oz)

Furnished Parts

Operating instructions . . . : . t. :1 . . I I

Gunilvlilirmt'nrllwllllmnliiuuh _. . - .
NOTES:

1. Reference Recording Level: Meter OdB indicating level (160
nwb/m magnetic level = Philips cassette reference level)

2. Reference Signal: 333Hz

3..iWow 8t Flutter: oJlS (SkHz, with acoustic compensation
(weighted); rrns value] f . ..

4. Frequencyvfiesponse: 0 Measured at -20d8 level, DOLBY NR
OFF, level deviation is :GGB withom indication.

5. Signal to Noise Ratio: OIMeasured at the third harmonic distor-
tion 3% level, weighted.

6. Sensitivity: Input level (mV) required (or reierence recording
level with input (REC) controls set to maximum,

7 Maximum Allowable input: While decreasing settings of input
(REC) level controls and increasing level at input jacks, this Is '
the maximum input level (mV) at the point where recording
amplifier output waveform becomes clipped.

8. Reference Output Level: Playback output level when meter
indicates (ME. =

NOTE: ,
Specilicatians and the design subject to possible modifications
~without notice due to improvements.

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