Marantz 2385 Service Manual

Page 2

TABLE OF CU NTENTS

Section Title Page
1. aw. BOARDS ....................................................................... I
2. TEST EOUIPMENT BEOUIHED Eon SERVICING ................................................. 2
3. AM ALIGNMENT PROCEDURES ........................................................... 2

3.1 AM IF Alignment .................................................................. 2
3.2 AM Frequency Range and Tracking Alignment .................................................. 2
3.3 AM Signal Strength Meter Alignment ....................................................... 2
4. FM ALIGNMENT PROCEDURES ........................................................... 2
4.1 FM Freouencv fiance and Tracking Alignment .................................................. 2
4.2 Stereo Separation Alignment ............................................................ 3
4.3 Muting Circuit Alignment .............................................................. 3
4.4 Dolby FM Tapaflutputsetting ..................................................... - . - - - 4
5. Adam ADJUSTMENT .................................................................. 4
s. VOLTAGE CONVERSION FOR EUROPEAN MOOEL ........................................ . ----- 4
7. DIAonAMs ................................................................ . - 5

7.1 Block Diagram ........................................................... . - - - - - 5
7.2 Connection Diagram - U.S.A. 81 Canada . . .................................................. 3
7.3 Connection Diagram ~ Europe ...................................................... - - - - ~1
s. SCHEMATIC OIACnAMs ANO COMPONENT LOCATIONS ...................................... . . - - -12
13.1 FM Front End Circuit Board mo .......... ' .......................................... . - - - -12
8.2 AM Tuner, FM IF 81 MPX Stereo Decoder Circuit Board P200 .................................... - - - - ~ 13
8.3 PM Noise Amp Circuit Board P800 ................................................... - - - - .16
8.4 FM Buffer Amp Circuit Board PC00 ................................................. - - - - ~15
8.5 Phooo Amp 81 Selector Switch Circuit Board P400 ........................................ - - - - - 17
8.6 Power Supply Circuit Board P850 .................................................. - - - - - 13
8.7 Main Amp 8. Peak |ndiutor Circuit Board mo .......................................... - . - ~ - 13
8.8 Pre &Tone Amp Circuit Board PE00 . . . ........................................... - . - - . 22
8,9 Dolby NR Socket Circuit Board PK00. . . ............................................. - . . ~ . 24
8.10 Audio Muting Circuit Board PN00 .................................................. - - - - - 24
3.11 Soft Start Circuit Board P000 .................................................... - - . - - 24
3.12 Tape Copy, Tape Monitor, MPX Noise Filter a Muitipath Switches Circuit Board PSOO . . . . . . ............. - . - - 15
8.13 Dubbing In 81 Out Jacks Circuit Board PV00 ............................................ .- - - - - 25
8.14 Filter Amp Circuit Board PT00 .................................................... , - - - ~25
8.15 Speaker System Switch 81 Attenuator Circuit Board PW00 .................................... - - . - - 25
3.16 Peak a Function indicator LEO Circuit Board ono ....................................... - . - . - 27
8.17 Dial Lamp Circuit Board P200 .................................................... - - - - - 27
9. MAJOR COMPONENT LOCATIONS ..................................................... -- - - - . 28
9.1 Cabinet - Front View - U.S.A. 81 Canada . . , . . . . 20
9.2 Chassis - Top View - U.S.A. 81 Canada . . . _ . 28
9.3 Cabinet - Rear View - U.S.A. 81 Canada . . . , . . . .29
9 .4 Chassis ~ Bottom View - U.S.A. & Canada ................................................ , - - ~ - 29
9.5 Cabinet - Front View - Europe ...................................................... - - ~ - - 3°
9.5 Chassis-Top View- Europe ....................... , - . - - 30
9 .7 Cabinet - Rear View ~ Europe ...................................................... , - - - - 31
9 .ll Chassis . Bottom View - Europe ..................................................... - . - - - 31
10. EXPLDDED VIEWS ............................................................... , ----32
10.1 Front Panel Exploded View ...................... - . - - 32
1 0.2 Chassis Exploded View ......................... - 3
1 03 Rear Panel Exploded View - Europe .................. . 35
. 37

1 04 Packing Material Exploded View ..................................