Denon PRA 6000 Service Manual

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DENON

SERVICE MANUAL
MODEL FHA-6000

SOLID STATE
PRE MAIN AMPLIFIER

CONTENTS
SPECIFICATIONS ........................................................... I
FRONTPANEL CONTROLS ................................................... 1
BACK PANEL CONTROLS ..................................................... 2
CONNECTIONS ............................................................ 2
BLOCK DIAGRAM .......................................................... 3
METHOD OF ADJUSTMENTS ................................................... 4
TROUBLESHOOTING ........................................................ 5
SWMICONDUCTORS ......................................................... 6
PRINTED WIRING BOARD PATTERNS AND PARTS LIST
MC AMP UNIT ETC-483 ................................................... 7,8
FLAT AMP UNIT ETC-484 ................................................. 9,10
INPUT TERMINAL UNIT ETC-485 .............................................. 11
TONE UNIT ETC-486 ..................................................... 11,12
CONTROL (A) UNIT ETC-487 ............................................... 12,13
CONTROL (B) UNIT ETC»488 ................................................. 14
BALANCE VR UNIT ETC-489 ................................................. 14
LAMP &SW UNIT ETC-490 ................................................... 15
E0. AMP UNIT EUX-014 .................................................. 15~13
POWER SUPPLY UNIT SUX-OBO ............................................. 18,19
WIRING DIAGRAM ............................. . ............................ 20
EXPLODED VIEW OF CHASSIS AND CABINET ....................................... 2?

NIPPON COLUMBIA (11]., LTD.

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&- Means importam safey item, which mu be raplaced,
when necessary, by a pan specified or meeting the specification

by (he manufactuyen

NIPPON COLUMBIA CO., LTD.
NCI,14-14,4-CH0ME AKASAKA,
MlNATO-KU, TOKvo 107 JAPAN

TEL: 035349111

TLX: JAPANOLA 322591

CABLE: NIPPONCOLUMBIATOKYO

)ns 5:. Part No. Part Name & Dascrimians 3:. Part No. Part Name & Dascripfions
62 ETC0488 CONTROL (B) UNIT 93 1430148078 FILTER
63 EUX0014 ECL AMP UNIT 94 1460510003 REFLECTOR
64 4121057103 H|NGE BRACKET (R) 95 4732354033 FLAT HEAD TAPPING SCREW 3x8
65 4330254001 DAMPER (BLACK)
66 4711204036 CROSS PAN SCREW 2.6x8 96 1430245146 FILTER 3°;- pa, No, p." N... & Daggyiption;
MFNIB) 67 4630290003 SPRING PLATE 97 1430245159 FILTER
' ' 68 4240065005 CAM PLATE (R) 98 ETCO4902 INPUT SW UNIT 123 1440950007 SIDE covER (R)
69 4121060006 BASE BRACKET (R) 99 1440951006 SIDE Esc BAR (R) 124 1440976007 SIDE COVER (L)
70 4711304017 CRosS PAN SCREW 3x8 100 1220094002 SPACER 125 4732355032 FLAT HEAD TAPPING SCREW (2) 3x10
71 4756006008 NUT 03 101 1440979101 SIDE ESC BAR (L) (BLACK)
72 4630291007 SPRING 102 1430254109 WINDOW GLASS 126 4770052012 FIx. SCREW
73 4714304030 TAPPING SCREW 3x8 (BLACK) 103 1460496101 INSIDE PLATE 127 1440953101 DOOR
74 4121056104 HINGE BRACKET (L) 104 1140063100 KNOB GUIDE (P) 128 4714304030 TAPPING SCREW 3x8 (BLACK)
75 4250130001 BEARING 105 1140065001 KNOB GUIDE (1) 29 1050478102 BLIND PLATE
76 4220721005 SHAFT 105 4610178014 RUBBER SHEET ((4) 130 4734355032 TAPPING SCREW (THUS) 3x6 (BLACK)
77 4121061005 BASE BRACKET 107 4510173030 RUBBER SHEET ((5 BLACK) 131 1430255000 TOP WINDOW GLASS
78 4711308013 CROSS PAN SCREW 3x14 (06 1130336009 PUSH KNOB (I) (BLACK) 132 1220094015 SPACER
79 1050477200 BOTTOM COVER 109 4630182051 SPRING 133 1440952005 VENTILATOR
80 1440393009 FOOT BASE 110 4700010011 CROSS PAN SCREW WITH W 3x8 134 1220069008 SPACER
BI 4610170009 SPACER 111 1460497003 TOP 550 BAR 135 4712305031 FLAT HEAD SCREW 3x10 (BLACK)
W 82 1240039019 FELT SHEET 112 4712303033 FLAT HEAD SCREW 3x6 136
83 4730459011 TAPPING SCREW (2) 4x16 113 1220094031 SPACER 137
84 4121062208 PANEL BRACKET 114 1130336009 PUSH KNOB (I)
85 4121063003 WINDOW BRACKET 115 4140267000 BLIND PLATE
BS 1220094028 SPACER 116 4140266001 COVER BRACKET
87 4610178027 RUBBER SHEET 117 4610178001 RUBBER SHEET
88 1430245162 FILTER 118 1130325104 PUSH KNOB (P)
19) 89 4730353036 TAPPING SCREW 3x6 (MFNIB) 119 1120383101 KNOB ASS'V
90 1430245120 FILTER 120 1120384003 KNOB ASS'v
91 1430245133 FILTER 121 1120389105 KNOB
92 1430148065 FILTER 122 1050479004 BLIND COVER