Marantz SD-4050 Service Manual
Service
SD4050 /N1B, /U1B, /F1B
Manual
Cassette Deck
TABLE OF CONTENTS
1. TECHNICAL SPECIFICATION ...............................................................................1
2. BLOCK DIAGRAM ..................................................................................................2
3. WIRING DIAGRAM.................................................................................................3
4. ADJUSTMENT PROCEDURE ................................................................................ 5
5. SCHEMATIC DIAGRAM AND PARTS LOCATION ............................................... 10
6. MICROPROCESSOR AND IC DATA....................................................................17
7. EXPLODED VIEW AND PARTS LIST...................................................................19
8. ELECTRICAL PARTS LIST...................................................................................22
Please use this service manual with referring to the user guide (D.F.U) without fail.
SD4050
Printed in Japan
- SD4050 -
286W855010 AO
3120 785 22012
First Issue:1999.08
MARANTZ DESIGN AND SERVICE
Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound.
Only original
it is famous.
Parts for your
ORDERING PARTS :
Parts can be ordered either by mail or by Fax.. In both cases, the correct part number has to be specified.
The following information must be supplied to eliminate delays in processing your order :
1. Complete address
2. Complete part numbers and quantities required
3. Description of parts
4. Model number for which part is required
5. Way of shipment
6. Signature : any order form or Fax. must be signed, otherwise such part order will be considered as null and void.
MARANTZ parts can insure that your MARANTZ product will continue to perform to the specifications for which
MARANTZ equipment are generally available to our National Marantz Subsidiary or Agent.
USA
MARANTZ AMERICA, INCMARANTZ AMERICA, INC.
440 MEDINAH ROAD
ROSELLE, ILLINOIS 60172
USA
PHONE : 630 - 307 - 3100
FAX : 630 - 307 - 2687
SUPERSCOPE TECHNOLOGIES, INC.
MARANTZ PROFESSIONAL PRODUCTS
2640 WHITE OAK CIRCLE, SUITE A
AURORA, ILLINOIS 60504 USA
PHONE : 630 - 820 - 4800
FAX : 630 - 820 - 8103
AMERICAS
AUSTRALIA
JAMO AUSTRALIA PTY LTD
1 EXPO COURT, P.O. BOX 350
MT. WAVERLEY VIC 3149
AUSTRALIA
PHONE : +61 - 3 - 9543 - 1522
FAX : +61 - 3 - 9543 - 3677
EUROPE / TRADING
MARANTZ EUROPE B.V.
P.O.BOX 80002, BUILDING SFF2
5600 JB EINDHOVEN
THE NETHERLANDS
PHONE : +31 - 40 - 2732241
FAX : +31 - 40 - 2735578
CANADA
LENBROOK INDUSTRIES LIMITED
633 GRANITE COURT,
PICKERING, ONTARIO L1W 3K1
CANADA
PHONE : 905 - 831 - 6333
FAX : 905 - 831 - 6936
THAILAND
MRZ STANDARD CO.,LTD
746 - 754 MAHACHAI ROAD.,
WANGBURAPAPIROM, PHRANAKORN,
BANGKOK, 10200 THAILAND
PHONE : +66 - 2 - 222 9181
FAX : +66 - 2 - 224 6795
TAIWAN
PAI- YUING CO., LTD.
6 TH FL NO, 148 SUNG KIANG ROAD,
TAIPEI, 10429, TAIWAN R.O.C.
PHONE : +886 - 2 - 25221304
FAX : +886 - 2 - 25630415
BRAZIL
MARANTZ BRAZIL
CAIXA POSTAL 21462
CEP 04698-970
SAO PAULO, SP, BRAZIL
PHONE : 0800 - 123123
FAX : +55 11 534. 8988
(Discagem Direta Gratuita)
SINGAPORE
WO KEE HONG (S) PTE LTD
WO KEE HONG CENTRE
NO.23, LORONG 8, TOA PAYOH
SINGAPORE 319257
PHONE : +65 2544555
FAX : +65 2502213
MALAYSIA
WO KEE HONG ELECTRONICS SDN. BHD.
NO. 102 JALAN SS 21/35, DAMANSARA
UTAMA, 47400 PETALING JAYA
SELANGOR DARUL EHSAN, MALAYSIA
PHONE : +60 3 - 7184666
FAX : +60 3 - 7173828
JAPAN
MARANTZ JAPAN, INC.
Technical
35- 1, 7- CHOME, SAGAMIONO
SAGAMIHARA - SHI, KANAGAWA
JAPAN 228-8505
PHONE : +81 42 748 1013
FAX : +81 42 748 9190
KOREA
MK ENTERPRISES LTD.
ROOM 604/605, ELECTRO-OFFICETEL, 16-58,
3GA, HANGANG-RO, YONGSAN-KU, SEOUL
KOREA
PHONE : +822 - 3232 - 155
FAX : +822 - 3232 - 154
SHOCK, FIRE HAZARD SERVICE TEST :
CAUTION : After servicing this appliance and prior to returning to customer, measure the resistance between either primary AC
cord connector pins ( with unit NOT connected to AC mains and its Power switch ON ), and the face or Front Panel of product and
controls and chassis bottom.
Any resistance measurement less than 1 Megohms should cause unit to be repaired or corrected before AC power is applied, and
verified before it is return to the user/customer.
Ref. UL Standard No. 1492.
In case of difficulties, do not hesitate to contact the Technical
Department at above mentioned address.
990729A.O
1. TECHNICAL SPECIFICATION
Track System : 4-track, 2-channel stereo
Heads : Deck I ; 1 Playback (Rotating)
Deck II ; 1 Erase and 1 Record/
Playback (Rotating)
Type of Tape : Cassette tape C-60 and C-90 (Philips
type)
Tape Speeds : 4.8 cm/sec, 4.9 cm/sec (When high
speed dubbing)
Motors : DC servo motor x 2
Wow and Flutter : 0.09 % RMS, +/- 0.1 %w. peak
Frequency response (Overall, -20 dB) :
25-18,000Hz +/- 3 dB (at -20 dB, metal
tape)
Signal-to-Noise Ratio (Overall) :
More than 74 dB (CCIR/ARM); Dolby
C NR on
Fast Winding Time : Appopox. 110sec with a C60 cassette
Inputs : 100 mV/50k ohm input level at
maximum
Outputs : 460 mV/47k ohm maximum
(0 dB : 200 nWb/mm)
Power Requirements :
120 V AC, 60 Hz
(U.S.A./Canada model)
230 V AC, 50 Hz (Europe model)
Power Consumption :
0.16 A
Dimensions (W x H x D) :
440 x 124 x 286 m/m (W x H x D)
Weight : 4.0 kg
Standard Accessories :
Remote control unit (RC455SD) x 1
(U.S.A. /Canada model only), Battery
(SUM-3, “AA”, “R6” type) x 2 (U.S.A. /
Canada model only),
Input-output connection cord x 1
Remote control cable x 1
Recording Bias : Apporox. 100 kHz
Channel Separation :More than 40 dB (at 1 kHz)
Phones : 0.95 mW (load impedance 8 ohm to
1.2k ohm)
Improvements may result in specification or feature changing without notice.
Dolby noise reduction and HX Pro headroom extension
manufactured under license from Dolby Laboratories
Licensing Corporation. HX Pro originated by Bang &
Olufsen.
“DOLBY”, the double-D symbol and “HX PRO” are
trademarks of Dolby Laboratories Licensing
Corporation.
1
2. BLOCK DIAGRAM
FL DISPLAY
METER AMP
CPSPB AMP
OUTPUT
PHONES
INPUT
PHONES AMP
PB AMP
PB EQ
HI SPEED
DOLBY NR B,C
REC
PB EQ
PLAY
REC AMP
REC EQ
+V
HX PRO
BIAS ADJ.
BIAS
OSC
-V
DECK A
PLAY HEAD
DECK B
R/P HEAD
E HEAD
2
3. WIRING DIAGRAM
DECK I
PLAY HEAD
L
PLAY HEAD
R
DECK II
R/P HEAD
L
R/P HEAD
R
E HEAD
PCB PHONE
PCB MAIN
1
1
2
2
3
3
1
1
2
2
3
3
4
4
5
5
6
6
P301 470
3
2
1
P302
5
4
3
2
1
P303
2
1
P307
P308
P309
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
12
12
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
1
1
2
2
3
3
4
4
5
5
6
6
J307
1
2
3
4
5
6
7
8
9
10
11
12
J308
1
2
3
4
5
6
7
8
9
J311
1
2
3
4
5
6
PCB CONTROL
J503
1
2
3
1
2
3
1
2
3
P503
J319
1
2
3
4
5
6
7
8
9
10
J320
1
2
3
4
5
6
7
8
9
10
11
12
13
PCB VR
1
2
P318
P504
1
1
2
2
J306
1
2
3
1
2
1
2
3
P306
P305
J401
5
4
3
3
2
2
1
1
3
2
1
1
2
3
MECH I
1
2
3
4
5
6
7
8
9
10
MECH II
1
2
3
4
5
6
7
8
9
10
11
12
13
J504
1
2
470
+-AB
PLAY
SOL
CrO2
TAPE
+-AB
PLAY
SOL
CrO2
TAPE
F.REC
METAL
R.REC
P304
J304
12345
12345
12345
J501
1
2
3
4
5
6
P501
1
2
3
4
5
6
PCB TRANS B PCB REMOTE
PCB SLIDE PCB KEY
3 4
4. ADJUSTMENT PROCEDURE
4-1 MECHANICAL ADJUSTMENT
4-1-1 Wow and flutter (playback method)
In both FWD and REV play modes, these measurements
should be made at the beginning, middle, and the end of the
tape.
1. Connect a wow-and-flutter meter to the LINE OUT.
2. Load and play a TEAC MTT-111N test tape.
3. Check that readings on the wow-and-flutter meter is within
0.19% (JIS WTD).
4-1-2 Tape speed
1. Connect a frequency counter to the LINE OUT.
2. Load a TEAC MTT-111N test tape and play in FWD
direction the beginning of the test tape.
3. Adjust each variable resistor to get the following values.
Adjustment point Adjustment value
4-2 ELECTRICAL ADJUSTMENT
4-2-1 Precautions
Before performing adjustments and checks clean and
demagnetize the entire tape parh.
In general, adjustments and checks are made in the order
of Lch then Rch. Double REF. Nos. indicate Lch/Rch.
(Example ; R11/R21)
0dB is referenced to 0.775V.
The AC voltmeter used in the procedures must have an
input impedance of 1M or more.
Unless specified otherwise, adjustments and checks are
made in FWD direction.
4-2-2 Adjustment locations
Fig. 2-1
4. In play mode, check that the following values are obtained
at the beginning and end of the tape.
Speed drifting : Within 120 Hz (HIGH speed)
Within 60 Hz (LOW speed)
4-1-3 Reel torque
1. Load the cassette torque meter on the deck and read the
pointer indication on the dial scale for each tape transport
operation. The measured torque should be within the
following specified values.
Take-up : 30 to 70g-cm
Supply : 1.5 to 6g-cm
FF/REV : 70 to 150g-cm
Torque metter
MTT-8111W : Forward torque & back tension
MTT-8121W : Reverse torque & back tension
MTT-8242 : Fast forward & rewind static torque
PLAYBACK
REC/PLAY
HIGH speed VR2 6,000 30Hz
LOW speed VR1 3,000 20Hz
HIGH speed VR4 6,000 30Hz
LOW speed VR3 3,000 20Hz
Fig. 2-2
5
6
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