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QPIONEER
CIRCUIT DESCRIPTIONS
ORDER
NO.
ARP-894-0
AUDIO/VIDEO STEREO RECEIVER
xX-V500(BK)
'This service manual refers to the circuit descriptions only.
© For the repeir and adjustments, please see service manual (ARP-862) of SX-V500(BK}
CONTENTS
BENS
CIRCLIT DESCRIPTIONS |...
2
BLOCK DIAGRAM ..
3
OPERATION DIAGRAM
5
ic DATA
20
PIONEER ELECTRONIC CORPORATION 41, vegmo toners, Megronu Toye 183, Janen
PIONEER ELEGTRONIGS [UBA} INC. P.O. Box 1760, Long Seach Gunrorna SOEONUSA
TEL: 800} 421-1404, (S00) 237-0424
PIONEER ELECTRONIC [EUROPE] N.V. Keetergieen 1, 2740) Beveren Seigurn TEL: CS/7752508
BIONERR ELECTRONIGH AUSTRALIA PTY. L¥a. 175-164 Bouncary Float Grasade Vitor S156, Bustrata
TEL: (03) SEO-SS3+
tO HY. 1955 Printed in Japa
SX-VSOO0I8K)
1. CIRCUIT DESCRIPTIONS
W TUNER SECTION
FM signal is output to the function 1C (TC9163N) of
the PRE-AMP section from the triple standard front end,
narrow band ceramic filter, FM IF and DET IC
(PA3001A) and after it is being passed through beat
climinate filter, MPX IC (HAI2016) and the LPF,
AM signal which comes from 2 large loop antenna
and FET buffer amplifier is passed through the AM
TUNER IC (LAI247) to output the beat eliminate filter,
MPX IC (H1A12016), For AM, 2 AM STEREO OUT
terminal is provided.
@ AUDIO SECTION
+ PRE-AMP
section
The individual inputs and outputs are selected by
FUNCTION IC (TC9163N and PA4008), RECORDING
SELECTOR IC (TC9I64N) and output to ELECTRONIC
VOLUME 1C (TC9177P). At this point, DYNAMIC
NOISE REDUCTION circuit is operated 10 reduce noise
level with DNR SW is tumed ON during the FUNCTION
modes are in VCRI. VCR2, and VCR3. By varying the
volume sound ranging from —78 dB 10 0 dB every 24B
step with the ELECTRONIC VOLUME IC and it is
'output (0 the PRE-OUT after being passed through the
tone volume. The simulated stereo circuit js incorporated
only to the Leh, in order to make artificial stereo sound
only for the Leh. against monaural input signal by its
delaying phase.
+ Power AMP section
The input signal from the POWER AMP-IN terminal
goes to Darlington connecting pure complementary
push pull circuit to drive speeker with high power of80W
"+ 80W after it is being passed through the transistor
differentia! amplifier first stage, current mirror, emitter
follower, constant current loading pre-drive. and non-
switching AMP IC (PAO016),
M@ RECEIVER CONTROL SECTION
Function; recording selection, volumes and pre-set are
controlled by RECEIVER CONTROL IC {PDE006) with
ane touch control, and in addition to that fuorescent
lube, individual LEDs. RF switch: and VIDEO 'switch,
eic, are also controlied by this IC.
Ml POWER SECTION
During A + B speakers driving (8 to 169) and
parallel A and B driving (4N to 8M), the output stage of
the power amplifier is stabilized by switching the power
transformer secondary coll 10 low voltage with the
speeker impedance changeover switch.
@
RF SECTION
Switching of VDP/VCRI, VCR2 and VCR3 is
respectively made by using the high frequency relay.
™
VIDEO
SECTION
Switching of VDP/VCRI, VCR2, VCR3,and adaptor is
made by using the CMOS VIDEO SWITCH (TC4066BP),
and the individual outputs of the ADAPTOR OUT,
VCR3 REC, and MONITOR TV are ablained through
the VIDEO AMP.
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