Denon DCD-3520 - Service Program and Adjustment Overview; Starting Service Mode and Controls

(e
ADJUSTMENT
Microcomputer built in the unit, comprises service program to facilitate servo adjustment by pushing operation button.
1. Start service program r Short
(1) Turn power switch OFF.
(2)
Shortcircuit
pins
@),
@
of
connector
(TP
102)
on
P.W.B.
(Main
Unit)
AA
(Caution) Do not touch other pins. <5
ee
(3) Turn power switch ON.
Short-Circuit Connector Jig for TP 102
’
(Service program starts, and displays track number ul)
(Caution)
@ When service program started normal operation of buttons will be defeated.
2. Service program function
Button Function Description
Opens or closes only when disc is stopped.
Operate other keys after open or close .
A OPEN/CLOSE Opens or closes the disc holder.
Displays track number ti / .
STOP Stops system function. : ¢
@
ia
Push
when
adjustment
completed,
or
do
it
again.
Starts focus servo and disc e@ Push when adjust tracking offset. a
turns, e When completed, displays track number ae ;
Starts focus servo, tracking When PLAY button is pushed, starts tracking servo and
Hf PAUSE servo, slide servo, spindle slide servo. -
servo, When completed, track number Liz.
Do not operate buttons other than above.
Other
button
No
normal
operation.
.
: ;
.
r
If
misoperated,
immediately
turn
power
switch
OFF.
(Caution)
®@ Do not use remote contro! during service program mode,
3. Adjustment
(1) Prior to start adjustment
Before adjusting laser P.U. and spindle moter, be sure adjust turntable height at the time of turntable assembly.
(2) Necessary equipment for adjustment
Dual trace oscilloscope
Reference disk (CA-1094) BAIA
Oscillator (10 Hz ~ 10 kHz, 0 ~ 3 Vp-p) Input = 33 kKQ Output
(Main unit) 0.001 uF (Oscilloscope)
Frequency counter (readable more than 5 MHz)
Filter for measurement
Ah wWND =
(Filter for measurement)
—1F— Mark:0.001 uF
Figure Jig Combination
19