Service Manuals, User Guides, Schematic Diagrams or docs for : DENON LP Turntable LP Turntable Denon - DP-500M Схема DP-500M
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For U.S.A. model
Ver. 5
SERVICE MANUAL Please refer to the
MODIFICATION NOTICE.
MODEL DP-500M
DIRECT DRIVE TURN TABLE SYSTEM
For purposes of improvement, specifications and
design are subject to change without notice.
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
Denon Brand Company, D&M Holdings Inc.
X0193 V.05 DE/CDM 0712
DP-500M 2
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power
cord is less than 460 kohms, the unit is defective.
CAUTION Please heed the points listed below during servicing and inspection.
Heed the cautions! Inspect for safety after servicing!
Spots requiring particular attention when servicing, such as Check that all screws, parts and wires removed or discon-
the cabinet, parts, chassis, etc., have cautions indicated on nected for servicing have been put back in their original posi-
labels or seals. Be sure to heed these cautions and the cau- tions, inspect that no parts around the area that has been
tions indicated in the handling instructions. serviced have been negatively affected, conduct an insulation
check on the external metal connectors and between the
Caution concerning electric shock! blades of the power plug, and otherwise check that safety is
ensured.
(1) An AC voltage is impressed on this set, so touching inter-
nal metal parts when the set is energized could cause
(Insulation check procedure)
electric shock. Take care to avoid electric shock, by for ex-
Unplug the power cord from the power outlet, disconnect the
ample using an isolating transformer and gloves when
antenna, plugs, etc., and turn the power switch on. Using a
servicing while the set is energized, unplugging the power
500V insulation resistance tester, check that the insulation re-
cord when replacing parts, etc.
sistance between the terminals of the power plug and the ex-
(2)There are high voltage parts inside. Handle with extra care ternally exposed metal parts (antenna terminal, headphones
when the set is energized. terminal, microphone terminal, input terminal, etc.) is 1M or
greater. If it is less, the set must be inspected and repaired.
Caution concerning disassembly and assembly!
Though great care is taken when manufacturing parts from
sheet metal, there may in some rare cases be burrs on the
edges of parts which could cause injury if fingers are moved CAUTION Concerning important safety parts
across them. Use gloves to protect your hands.
Many of the electric and structural parts used in the set have
Only use designated parts! special safety properties. In most cases these properties are
difficult to distinguish by sight, and using replacement parts
The set's parts have specific safety properties (fire resis- with higher ratings (rated power and withstand voltage) does
tance, voltage resistance, etc.). For replacement parts, be not necessarily guarantee that safety performance will be pre-
sure to use parts which have the same properties. In particu- served. Parts with safety properties are indicated as shown
lar, for the important safety parts that are marked ! on wiring below on the wiring diagrams and parts lists is this service
diagrams and parts lists, be sure to use the designated parts. manual. Be sure to replace them with parts with the designat-
ed part number.
Be sure to mount parts and arrange the
wires as they were originally! (1) Schematic diagrams ... Indicated by the ! mark.
For safety reasons, some parts use tape, tubes or other insu- (2) Parts lists ... Indicated by the ! mark.
lating materials, and some parts are mounted away from the
Using parts other than the designated parts
surface of printed circuit boards. Care is also taken with the
could result in electric shock, fires or other
positions of the wires inside and clamps are used to keep
dangerous situations.
wires away from heating and high voltage parts, so be sure to
set everything back as it was originally.
2
DP-500M 3
DISASSEMBLY
( For reassembling, do reverse manner as to disassembling.)
1. PLATTER
(1) Remove mat on the platter.
(2) Remove platter by both hands.
2. BOTTOM BASE ASS'Y
(1) Put cabinet reversely.
(2) Remove 9 screws securing the bottom base Ass'y.
(3) Remove bottom base Ass'y by both hands.
3
DP-500M 4
3. MAIN P.W.B. ASS'Y , TONE ARM ASS'Y
(1) Remove 4 screws fastening the main P.W.B Ass'y.
(2) Unsolder 5 wires and GND wire from arm section on the output P.W.B. Ass'y.
(3) Remove 3 screws secured the tone arm.( Hold tone arm during removing.)
4. D.D. MOTOR ASS'Y, TRANSFORMER
(1) Remove 5 screws secured the D.D.motor Ass'y.
(2) Unsolder GND wire from output P.W.B. Ass'y on the D.D.motor Ass'y.
(3) Put cabinet reversely.
(4) Remove 4 screws secured D.D.motor Ass'y. ( Hold D.D.motor Ass' y during removing.)
(5) While holding 4 nuts , remove 4 screws secured transformer.
4
DP-500M 5
5. BUTTON ASS'Y
(1) Remove 6 screws secured the plates.
(2) Remove 3 screws secured the 33/45 P.W.B. Ass'y.
(3) Remove the plates from the button frame.
6. BUTTON DISASSEMBLING
(1) Insert a screwdriver or similar tool into the holes ( two places ) on the bottom of button frame and
push in the arrow direction firmly to remove the button from push switch.
(2) Remove 2 screws in the button frame.
5
BLOCK DIAGRAM
IC302
BA10393
CIRCUIT RECTIFIER
Q103,104
2SD1889,2SD1341 FG
IC301 DRIVE TRANSISTOR HEDS-9700
BD4745G
RESET IC AF51
X301
OSCILLATOR IC101,102
16MHz Q105,106
6
IC303 IC106 NIM2147DIP
IC104 2SD1889,2SD1341 COIL
MAX003 BU4066 DRIVE IC
4580 VOLTAGE OUTPUT DRIVE TRANSISTOR
CPU LEVEL ADJ. CONTROL SWITCH IC
HALL IC
H11,H12,H13
Q107,108 US1881KUA
IC304 2SD1889,2SD1341
W27C512
ROM DRIVE TRANSISTOR
IC105
4580 IC901,902,903
33 1/3,45 LED DISPLAY THE TWO-PHASE CONVERTS IC904,905,906
THREE-PHASE VOLTAGE POWER
DP-500M
6
DP-500M 7
ADJUSTMENT
1. WOW AND FLUTTER
(1) Remove the platter and put cabinet reversely.
(2) Remove the bottom base Ass'y.
(3) Connect 2 digital volt meters or testers to CN104 of D.D. motor P.W.B.( refer to the CN104 fig.)
(4) Turn ON and set the speed select switch to 33 rpm.
(5) Adjust R134 so that the absolute DC voltage of two meters may become the nearest.
or tester or tester
7
DP-500M 8
SEMICONDUCTORS
Only major semiconductors are shown, general semiconductors etc. are omitted to list.
IC's
MAX003 (IC303)
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
AS
RES
P67/
RD
VSS
VSS
A19
A18
A17
A16
A15
A14
VCC
HWR
NMI
MD2
MD1
MD0
LWR
STBY
XTAL
P61/BREQ
EXTAL
P60/WAIT
P62/BACK
76 50
AVCC A13
77 49
VREF A12
78 48
P70/AN0 A11
79 47
P71/AN1 A10
80 46
P72/AN2 A9
81 45
P73/AN3 A8
82 44
P74/AN4 VSS
83 43
P75/AN5 A7
84 42
P76/AN6/DA0 A6
85 41
P77/AN7/DA1 A5
86 40
AVSS A4
87
88
IRQ0/P80 IC303 A3
39
38
CS3/IRQ1/P81 A2
89
90
CS2/IRQ2/P82 MAX003 A1
37
36
ADTRG/CS1/IRQ3/P83 A0
91 35
CS0/P84 VCC
92 34
VSS D15
93 33
TCLKA/TP0/PA0 D14
94 32
TCLKB/TP1/PA1 D13
95 31
TCLKC/TIOCA0/TP2/PA2 D12
96 30
TCLKD/TIOCB0/TP3/PA3 D11
97 29
A23/PA4 D10
98 28
A22/PA5 D9
99 27
A21/PA6 D8
100 26
A20/PA7 D7/P47
D0/P40
D1/P41
D2/P42
D3/P43
D4/P44
D5/P45
D6/P46
RESO
VSS
VSS
VCL
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
P90
P91
P92
P93
P94
P95
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
W27E512-12/W27C512-45 (IC304)
PIN DESCRIPTION
A15 1 28 Vcc SYMBOL DESCRIPTION
A12 2 27 A14
A7 3 26 A13 A0-A15 Address Inputs
A6 4 25 A8
A5 5 28-pin 24 A9 Q0-Q7 Data Inputs/Outputs
A4 6 DIP 23 A11
A3 7 22 OE/Vpp CE Chip Enable
A2 8 21 A10
A1 9 20 CE OE/Vpp Output Enable, Program/Erase
Supply Voltage
A0 10 19 Q7
Q0 11 18 Q6 Vcc Power Supply
Q1 12 17 Q5
Q2 13 16 Q4 GND Ground
DND 14 15 Q3
NC No Connection
8
DP-500M 9
NJM-2147D (IC101,102)
OUT1 1 8 Vcc
-IN1 1ch
2 - + 7 OUT2
2ch
+ -
+IN1 3 6 -IN2
VEE 4 5 +IN2
HEDS9700F51 (IC103)
9
DP-500M 10
US1881 (H11 H13)
U18 *
135
PINOUT:
1 2 3
P in 1 V DD
Pin 2 GND
Pin 3 Output
DTC124TS
(3) Base
(2) Collector
(1) Emitter
2SB1340
C
B
R1 R2
E
B : Base
C : Collector
E : Emitter
2SD1889
C
B
R1 R2
E
B : Base
C : Collector
E : Emitter
10
PRINTED WIRING BOARD (1/2) DP-500M 11
1 2 3 4 5 6 7 8
A
B
C
D
E
11
PRINTED WIRING BOARD (2/2) DP-500M 12
1 2 3 4 5 6 7 8
A
B
C
D
E
12
DP-500M 13
NOTE FOR PARTS LIST
l Part indicated with the mark " " are not always in stock and possibly to
take a long period of time for supplying, or in some case supplying of
part may be refused.
l When ordering of part, clearly indicate "1" and "I" (i) to avoid mis-
supplying.
l Ordering part without stating its part number can not be supplied.
l Part indicated with the mark " " is not illustrated in the exploded view.
l Not including Carbon Film Resister ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo