Jvc 4 DD 5 Service Manual

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No. 2289

43?)

SERVICE MANUAL

. MODEL 4DD-5

" C1314 DISCL'DEMODULATQR

DIMENSIONSZ: H 3-3/8", W 6-.7/8", D 12-3/4" WEIGH'P: 5 lbs.

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Type > '. CD-4 disc demodulator

; , ngijconductor : 6 10s 27 Transistors 6 FETs 23 Diodes

V Fréqiliienby gesponse _ : 20Hz to 16,000Hz
Input level ' : 1.0%.0mv (at lkHz) 1.0~7.omv (at SOkHz)
Ratinggutput level : 300mV
Input impedance : 100kn.
Output impedance : 51m.
Power supély Voltage 1 AC 120V

- or AC 100/120I220/24QV Selectable
a] Power consumption ; 8W
V l ' Fuse rating- : 0.5A

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FRONT PANEL CONTROLS

Fig. 1

- Power Switch (D A - 7 ' g 7
Switch up to switch the 4DD-5 on. . ' V o ._ ¥._: ,

- Power Indicator ®
When the demodulator is switched ON this will glow red.

- Selector Switch @
This selects the mode with which the demodulator will work.

4CH AUTO

ZCH

When it is in this position the demodulator will inspect the input signal and, if it is a CD-4 disc signal,
it will demodulate it. In case of a 2 channel or matrix record, stereo 2 channel sound will be played

backthrough4speaker. 7- " _ fi-V - - ,o

The ZCH DIRECT OUT switch: on the rear panel is in the OFF position,the input signal will pass
through the main channel of demodulator and go to 40H OUT jack However, when the ZCH
DIRECT OUT switch is in the ON position the input signalwill go directly to the 2 CH DIRECT
OUT jacks.

. CD4 Radar @ .
When the demodulator is being used to demodulate a 4 channel, this light will glow red.

4DD<5