Marantz 2500 Service Manual

Page 2

«191

r,
hr.

tsliu

TABLE OF CONTENTS
Section Title Page
1. P.W.BDARDS ....... . ...... .................. .. .................... . ..... ...1
2. TEST EQUIPMENT REQUIRED FOR SERVICING . . . . . . . . . . . . . . . . . ................................ 2 :
3. AM ALIGNMENT PROCEDURES ...................................... '. . . . . . ......... p ...... Z
3.1AMIFAlignment..............L ...................... . ......... .. ............. ....2
3.2 AM Frequency Range and Tracking Alignment .............................. . ........... . ...... 2
3.3 AM Signal Strength Display Adiustment .................................. . . ................. 2
4. FM ALIGNMENT PROCEDURES ............................................................ 2
4.1 lF Frequency Range and Tracking Alignment ...................................... . ........... 2
4.2 Stereo Separation Alignment ..................................... ,. 3
4.3 MutingCircuit Alignment . . . .......................................................... 3
6.4 Dolby FM Tape Output Setting .......................................................... 3
5. AUDIO ADJUSTMENT . ........................ , ......................................... 3
6. SCOPE DISPLAY ADJUSTMENT ...... . ........................................ . ............ 4
6.1 AM Tuning Display Adiustrnent ................. . . . .................................... 4
6.2. PM Tuning Display Adiustment ........ . ...................................... , ........ 4
6.3 FM Multipath Display Adiustment .......... . ..................................... . ..... 4
7.VDLTAGECONVERSIONFOREUROPEANMODEL ...... ..... .
B.DIAGRAMS....... .................. ..... ..... . ...... . ......... .......
8.1 BlockDiagram ............... . ......... .............................
8.2 Connection Diagram - U.S.A.& Canada . . ............... . ............................ , . . . . ..
8.3 Connection Diagram ~ Europe ....... . . ........................................... . . . . . . .
9. SCHEMATIC DIAGRAMS AND COMPONENTS LOCATIONS ......... .. ..... . ......... . ........ .'. . . . . .12
9.1 PM FrontEnd CircuitBoard~PiflO.......... ....12

11].

9.2 AM Tuner, FM IF 8. MPX Stereo Decoder Circuit Board ~9200 . . . .. . . .13
9.3 FM Noise Arno CircuitBnard < P300 ... ............ . . . . . . . .18
9.4 FMBufierAmpCircuitBoard-P1301.................... . .. .15
9.5 Phono Amp 8i Selector Switch Circuit Board - P400 . . . . ........ . . . . . . . . 17
9.6 Power Supply Circuit Board - PBDU -' US.A. 8: Canada .......................... . ............. . . . . .13
9.7 Power Supply Circuit Board - P800 < Europe ................ . ........................ . . , . .. . . . .19
9.8 MainAmpCircuitBoard-P7DD.....................r ............ . ............ .........20
9.!) Pre & Tone Amp Circuit Board - PEOl .......................................... l . , , ..... 22
9.10 Dolby NR Socket Circuit Board ~ PK01 .................................. . . ..... '. . .

9.11 Audio Mutiny CircuitBoard -Pmn ........................... , .............. . ..... , . . . .. , . .24
9.12 Buffer Amp for Scope lnput - Circuit Board ~PDBI ................ . .................. . . . . . . . . _. . - 24
9.13 Tape Copy, Tape Monitoq-Lfi Scope Display Switches Circuit Board ~ PSI" ........ . .............. . .......... 25
9.14 Dubbingln& OutJacks Circuit Board ~PU01 ........... . .............. . . . . ............. 25
9.16 Filter Amp Circuit Board 1PTD1' .......................................

9.16 Speaker System Switches & Attenuator Circuit Board - PWDI ........................

9.17 Function lndicator Circuit Board - PYlli ....................................

9.18 Dial Lamp Circuit Board - P201 ....... . ................................... L . . . ........ ... . 27
9.19 Tape Monitor Switches Connection Circuit Board - PRB1 ........ . , . ................ . ............ . . . ZB "
9.20 Scope Amp Circuit Board - P900 ......................................................... 28
9.21 Power Transistor Connection Circuit Board - PM01 ............................................ . . 21]
9.22 Peak indicator & Soft Start Circuit Board - PX01 ............................................... 29
MAJOR COMPONENT LOCATIONS . . . . . ....... . .....

10.1 Cabinet - Front View . USA. & Canada .............

10.2 Chassis . Top View U.S.A. & Canada ..............

1113 Cabinet ~ Rear View - U.S.A, 8: Canada ......................................................

10.4 Chassis - Bottom View ~ U.S.A. & Canada .................................................... 31

x.