Equipment information

Marantz 2238B Receiver
Manufacturer:
Model:
2238B
Date:
Category:
Group:
Description:
STEREOPHONIC RECEIVER

Information

FOR U.S.A. MODEL ONLY TV Multimedia">Amplifier SECTION: RATED POWER OUTPUT, MINIMUM CONTINUOUS AVERAGE POWER PER CHANNEL, BOTH CHANNELS DRIVEN....................... 38W POWER BAND.................................................................................................................................................................................. 20 Hz to 20 kHz TOTAL HARMONIC DISTORTION................................................... ..............................................................................................................0.08% LOAD IMPEDANCE........................................................................................................................................ .....................................8 OHMS RATED POWER OUTPUT, MINIMUM CONTINUOUS AVERAGE POWER PER CHANNEL, BOTH CHANNELS DRIVEN....................... 48W POWER BAND................................................................................................................................................................................... 20 Hz to 20 kHz TOTAL HARMONIC DISTORTION....................................................................................................................................................................0.1% LOAD IMPEDANCE........................................................................................................................................................................................4 OHMS I.M. Distortion (I.H.F. method, 60 Hz and 7 kHz mixed 4:1 at rated power output) at 8 ohm load impedance...................................................0.08% at 4 ohm load impedance...................................................0.1% Damping Factor (at 20 Hz)...................................................................45 Sensitivity (at MAIN IN).................................................................. 1.5V Impedance (at MAIN IN)...................................................... 33k ohms Frequency Response for Power Amp Only (at 1 Watt output, 20 Hz to 20 kHz)................................+0.25 dB PREAMPLIFIER SECTION: Phono Input Overload at 1 kHz...................................................... 100 mV Equivalent Input Noise ............................................................1.5μν Dynamic Range (Dynamic Range is the ratio of input overload to equivalent input noise).........................................................96 dB Input Sensitivity......................................................................1.8 mV Input Impedance...............................................................47k ohms Input Capacitance......................................................................100 pF Frequency Response, RIAA 20 Hz to 20 kHz...................±1.0 dB Signal-to-Noise Ratio (at rated output and 7.75 mV input)................................76 dB High Level (Aux and Tape) Input Sensitivity............................................................ 180 mV Input Impedance . . ................................................ 20k ohms Frequency Response (includes power amp).............10 Hz to 60 kHz ± 1.25 dB Signal-to-Noise Ratio (ref. to rated output and 775 mV input)...................90 dB Output Levels Tape Out (ref. 7.75 mV at Phono inputs)................ 775 mV Pre-Out (ref. 180 mV at Aux inputs)............................. 1.5V (ref. 500 mV at Aux inputs, main amp disconnected)......................................................4.2V Output Impedance Tape Out......................................................................... 600 ohms Pre-Out............................................................................ 900 ohms FM TV Multimedia">Tuner SECTION: Sensitivity IHF Usable...............................................................10.8 dBf (1.9μν) IHF 50 dB Quieting (Mono)................................16.1 dBf (3.2μν) (Stereo).............................37.3 dBf ( 40μν) Quieting Slope (Mono) RF Input for 30 dB Quieting................................9.3 dBf (1.6μν) Quieting at: 20 dBf ( 5.5μν)......................................................................55 dB 25 dBf ( 10μν)......................................................................60 dB 40 dBf ( 55μν)......................................................................70 dB 65 dBf (1000μν)......................................................................75 dB Quieting Slope (Stereo) Quieting at: 30 dBf ( 17μν)................................ ................................42 dB 40 dBf ( 55μν)......................................................................53 dB 50 dBf ( 173μν)......................................................................58 dB 65 dBf (1000μν)......................................................................65 dB Distortion (Mono) at 65 dBf (1000μν) 100 Hz.........................................................................................0.25% 1000 Hz.........................................................................................0.15% 6000 Hz.........................................................................................0.35%. Distortion (Stereo) at 65 dBf (1000μν) — 100 Hz.........................................................................................0.35% 1000 Hz.........................................................................................0.3% 6000 Hz.........................................................................................0.55% Distortion (Mono and Stereo) at 50 dB Quieting, 1000 Hz......................................................0.6% Hum and Noise at 65 dBf (1000μν) Mono.........................................................................................73 dB Frequency Response 30 Hz to 15 kHz Mono...................................................................+0.2 dB,-1.5 dB Stereo...................................................................................±1.5 dB Capture Ratio at 65 dBf (1000μν)............................................. 1^0 dB. Alternate Channel Selectivity.........................................................70 dB Spurious Response Rejection.........................................................90 dB Image Response Rejection................................................................60 dB I.F. Rejection (Balanced)................................................................90dB A.M. Suppression...............................................................................50 dB Stereo Separation 100 Hz.........................................................................................40 dB 1000 Hz.........................................................................................45 dB 10 kHz......................................................................................40 dB Subcarrier Rejection.........................................................................60 dB AM TV Multimedia">Tuner SECTION: IHF Usable Sensitivity................................................................... 15μν Distortion (THD), 30% Modulation................................................0.5% Signal-to-Noise Ratio.........................................................................50 dB Alternate Channel Selectivity ..........................................................46 dB Image Rejection...................................................................................45 dB Spurious Response Rejection.........................................................60 dB I.F. Rejection......................................................................................40 dB GENERAL: Power Requirements................................................... 120V AC, 60 Hz Power Consumption at rated output, both channels operating...............................................................................................170W Idling Power (Volume Control at zero).............................................27W Dimensions: Panel Width............................................. 440 mm (17-5/16 inches) Panel Height...................................................137 mm (5-3/8 inches) Depth............................................................. 362 mm (14-1/2 inches) Weight: Unit alone............................................................. 12.5 kg (27.5 lbs.) Packed for Shipment.............................................15.0 kg (33.0 lbs) 40

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Service Manual
Manual Type:
Service Manual
Pages:
32
Size:
4.59 Mbytes (4808053 Bytes)
Language:
english
Revision:
Manual-ID:
2207855010
Date:
Quality:
Scanned document, all readable.
Upload date:
2015 03 08
MD5:
8783ae865bd5750cbd07db8653d5e812
Downloads:
710

Information

1. INTRODUCTION 1 2. SERVICE NOTES ... ... 1 3. TEST EQUIPMENT REQUIRED FOR SERVICING ... 2 4. AM ALIGNMENT PROCEDURE ... 2 5. FM ALIGNMENT PROCEDURE ... ... ... 3 6. POWER TV Multimedia">Amplifier ADJUSTMENT ... 3 7. POWER SUPPLY ADJUSTMENT ... 3 8. VOLTAGE CONVERSION FOR EUROPEAN MODEL ... 4 9. FTZ REGULATION FOR EUROPE ... 4 10. MAJOR COMPONENT LOCATIONS ... 5 10.1 Front Panel Adjustment and Component Locations ... 5 10.2 Main Chassis Component Locations (Top View) ... 5 10.3 Rear Panel Adjustment and Component Locations ... 6 10.4 Main Chassis Component Locations (Bottom View) ... 6 11. DIAGRAM AND COMPONENT LOCATIONS ... ... ... 7 11.1 FM & AM TV Multimedia">Tuner Assembly (P200) Schematic Diagram and Component Locations ... 7 11.2 Dial Lamp Assembly (PZ01) Schematic Diagram and Component Locations ... 9 11.3 DLB-1 Socket Assembly (PK01) Schematic Diagram and Component Locations ... 9^ 11.4 Main Amp. & Power Supply Assembly (P700) Schematic Diagram and Component Locations ... 10 11.5 Tone Amp. Assembly (PE01) Schematic Diagram and Component Locations ... 13 11.6 FM Front End Assembly (PI00) Schematic Diagram and Component Locations ... 14 11.7 EQ Amp. Assembly (P400) Schematic Diagram and Component Locations ... 15 12. BLOCK DIAGRAM ... 16 13. CONNECTION DIAGRAMS ... ... ... 17 13.1 For U.S.A. & Canadian Models ... 17 13.2 For European Model ... 19 14. SCHEMATIC DIAGRAMS ... ... ... 21 14.1 For U.S.A. & Canadian Models ... 21 14.2 For European Model ... 23 15. EXPLODED MECHANICAL DIAGRAMS ... ... ... ... 25 15.1 Cabinet ... 25 15.2 Chassis ... - ... 27 15.3 Rear Panel for U.S.A. & Canadian Models ... 29 15.4. Rear Panel for European Model ... 29 16. PACKING MATERIAL EXPLODED VIEW ... ... ... 30 17. PARTS LIST ... 31 18. TECHNICAL SPECIFICATIONS ... ... ... 40 This service manual was prepared for use by Authorized Warranty Stations and contains service information for Marantz Model 2238B Stereophonic TV Multimedia">Receiver. Servicing information and voltage data included in this manual are intended for use by the knowledgeable and experienced technician only. All instructions should be read carefully. No attempt should be made to proceed without a good understanding of the operations in the TV Multimedia">Receiver. The parts list furnishes information by which replacement parts may be ordered from the Marantz Company. A simple description is included for parts which can usually be obtained through local suppliers.

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