Pioneer ct 939 service manual

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(U) PIONEER

The future of sound and Vision

Sefiribé u
Wanna] y? ORDER

ARP1526

STEREO CASSETTE DECK.

CT- 5800
(ST-939

MODEL CT-SBOO AND CT-939 HAVE TWO VERSIONS:

Applicable model .
Tyne CT- CT- Power requirement Export destination
$800 939 '
ER / O - AC120V only U. S. A. and Canada
. HEM -- O AC220V. 240V (switchable) * European continent

* Change of the primary wiring. please refer to page 17.

O This service manual is applicable to the CT-S800/KU/CA and CT-939/HEM types.
0 For the CT-939/_HEM type, refer to page 51.

OThe CT-939 is the same as the CT-S800 except for the color.

0 The CT-939 is not equipped with a remote control terminal (SR terminal).

0 Ce manuel pour le service comprend Ies explications en frangais de réglage.
O Este manual d- servicio trata del método ajuste escrito en espafiol.

CONTENTS

I. SPECIFICATIONS --------------- 8. ELECTRICAL PARTS LIST ........... .
2. PANEL FACILITIES--- 9. ADJUSTMENTS"

3. DISASSEMBLY ................ 9. REGLAGE ............

4. PACKING ....................................................... 9 I 9' AJUSTE ........................................................ 44
5. EXPLODED VIEWS AND PARTS LIST -------- 10 10. SAFETY INFORMATION ----------

6. SCHEMATIC DIAGRAM -------------------------------- 17 11. FOR CT-939/HEM TYPES-~-

7.

P.C. BOARDS CONNECTION DIAGRAM ------- 21

PIONEER ELECTRONIC CORPORATION 4-1, Meguro I-Chome. Meguroku. Tokyo 153, Japan

PIONEER ELECTRONICS SERVICE INC. PO. Box 1760, Long Beach, California 90801 U.S.A.

PIONEER ELECTRONICS OF CANADA. INC. 505 Cochrane Drive, Markham, Ontario L3H 853 Canada

PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1. 2740 Beveren, Belgium

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside. Victoria 3195, Australia TEL: [03] 580-9911

SIO APR. 1988 Primrd in Japan

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1. SPECIFICATIONS

Systems .....
Heads . . . .

, . 4 track. 2-chennel stereo
Recording and playback heed
Lager amorphous playback heed]

Hard parmalloy recording heed combination x

Erasing head:(Ferrite held) X

Motors ............. DC tervo clpstan motor x
DC reel motor x

DC aux ry motor x I
Wow A Flutter .................. 0.024%(WRM5)
2 0t06%lDINl
Fest winding tlme ........ Approximately 80 seconds
(CrSO tape)

Frequency response (-20 dB recording)
Motel tIpI . t t . .......... 20 Hi to 22,000 Hz
Chrome tape ............... 20 Hz to 21,000 Hz
Norrnel tape ............... 20 Hz to 21,000 Hz

Signel»tovnoiae ratio

DOLBY NR OFF ....... . ....... More thin 50 dB

Noise Reduction Eifect
DOLeY NR 5 type on .
DOLBY NR c type 0N .

Harmonic distortion

. More than IO dB lat 5 kHz)
. More than 19 GB (at 5 kHll
. No more than 0,696 (0 dB)

Input , LINE: 67 mV
(Input lmpedance: 50 to)
Output .......................... LINE: 316 mv

(Output Impedance: 1.4 km
Headphones: 0.8 mW
[Load impedance on VR Max.)

Subfunctlons

O 3-mode counter (Ldlgit electronic counter)

- Auto Tlpe Loose Cenoeller lunction

0 Meter rlnge selection (\NIDEIEXPAND)

- Auto Monitor function (TAPE/SOURCE auto selection)
I Power Eiect (OPEN/CLOSE)

I Music Search (over :15 selections)

- Tape Return/Return play

I Heedphonu lack (with volume control)

t Bias control

I MFX filter

0 Auto Space Recording Mute

- Auto Tape Selector

' Pllybick/Recording timer start function

' Dolby Noise Reduction lB/C)

- Dolby HX Pro system

0 FL Level Meter Peak-hold function (I5 + | segments)
e

System remote control available (Not provided in the
European model)

Miscellaneous

Power Requirements
U.Si, Canadian models .......... AC IZOV, 60 H1
European model rrrrrrr . AC 220V, 50/60 H1
U K., Australian models . AC 240V, 50/60 H1
U. 5. military and other destination models .
ACIIOIIIZOV- i27V/220V/240V
50/50 H2 Iswltchahle)

Power Consumption
UiS., Canadian models . ............
European model ................. 23w
US. military, other destination models . . 28W
Dimensions ...... 420(W) X 133.5(H) x 372ml mm
16-9/16IWI x 5-l/MHI x 14-5/5?) in
Weight (without package)
U.S., Canadian, European models , t . .
9.5 kg (21 lb 2 01)
U.S. military, other destination models ...........
9.7 kg [21 lb 4 on

. 25W

Accessories

Operltlng Instructions ..................
Connecting cords ...... . . r . . . .
Control cord (Not provided in the European model). 1

NOTE:
Speafioetions Ind tie-'9" lubiect to pal-bio modificnlms wimout
notice, due to Improvements.

2. PANEL FACILITIES

- FRONT PANEL

if??? 7??

0 POWER switch

Turn the power on.

After the power is turned on, the dotted lines in the level
meter flash for approximately 4 seconds until the circuits
of the unit have Stabilized. The unit will not operate during
this time even it one of the operation buttons is pressed.

9 Cassette door OPEN/CLOSE button

NOTE:

II the con-no doom aloud while the unit I: turned OFF, no me
power I} trim turned on, are blue". door mly open and dos-
lIter passing and of the operation buttons This occur: when till
miaoprocessor reset: the door meehurism to in initial oteto and
does not indicon any muruncrioning or the unit.

9 COUNTER selectors

RESET:

Reset: the counter indication to "0000."

MODE:

Each time this outton Ii pressed. one or the lollowinu three

modes is net in sequence.

- Normal tape counter

- Time counter (displays the elapsed playback or recording
time)

- Remaining time counter (displays the remaining time of
the tape)

o TAPE CAPACITY selector

To indicate the correct time value in the remaining time
counter mode, this selector must be set in accordance with
the tape used.

(290 - CBOL - C60 CASL

e TAPE RETURN button

This button is used In the tape counter mode to last forward
or rewind the tape to a point near the counter reading
0000".

6 DOLBY NR selectors

Dill/OFF:

Used to turn the Dolby NR system circuits ON or OFF.
BIC:

with the ON/OFF switch in the ON position, Dolby B or C
can be selected with this switch.

0 MPX FILTER switch
This switch is effective only during recording with Dolby NH.

0 REC LEVEL control

9 REC BALANCE control