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SERVICE MANUAL
MODEL AVR-3803/1083
AVC-3570
AV SURROUND RECEIVER/AMPLIFIER
VOLUME LEVEL
REMOTE SIGNAL SURROUND
SENSOR BACK CH
DIGITAL OUTPUT
INPUT SIGNAL
ON / STANDBY AUTO PCM DTS DETECT
AVR-3803 AVC-3570
8
Some illustrations using in this service manual are ,
slightly different from the actual set.
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
Telephone: 03 (3837) 5321
X0155 NC 0211
AVR-3803/1083/AVC-3570
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.
500V
1M
(1)
(2)
(1)
(2)
2
AVR-3803/1083/AVC-3570
WIRE ARRANGEMENT
If wire bundles are untied or moved to perform adjustment or
parts replacement etc.,be sure to rearrange them neatly as
they were originally bundled or placed afterward.
Otherwise, incorrect arrangement can be a cause of noise
generation.
Wire arrangement viewed from the top
3
AVR-3803/1083/AVC-3570
DISASSEMBLY
(Follow the procedure below in reverse order
when reassembling)
1. Top Cover 1. Top Cover
Remove 3 screws on the rear and 6 screws on both 3 6 Top Cover
sides to detach the Top Cover as shown in the arrow
direction.
Top Cover
2. Front Panel 2. Front Panel
(1) Remove 7 screws from the top and bottom edges of (1) Front Panel 7
the Front Panel. (2) Front Panel 4 Hook
(2) Release 4 top and bottom Hooks, then detach the Front Panel
Front Panel as shown in the arrow direction.
Hook
Front Panel
Hook
Hook Hook
3. Inner Panel 3. Inner Panel
Pull out the Inner Panel in the arrow direction after 3 Inner Panel
removing 3 screws.
Inner Panel
4
AVR-3803/1083/AVC-3570
4. Inner Panel Ass'y 4. Inner Panel Ass'y
(1) Remove 3 round and 1 square knobs, and unscrew 4 (1) Round Knob 3 Square Knob 1 4
nuts. Nut
(2) Remove 14 screws fixing each P.W.B. (2) PWB 14
Nut
Round Knob
Square Knob
Nut
Round Knob
5. Amp Connect Unit/Component Video Unit 5. Amp Connect Unit/Component Video Unit
(1) Remove 9 screws to detach Pre-out Unit and (1) 12 Pre-out Unit Component Video
Component Video Unit. Unit
(2) Take off the Amp Connect Unit as shown in the arrow (2) 1 Amp Connect Unit
direction after removing 1 screw.
Pre-out Unit
Component Video Unit
Amp Connect Unit
6. Regulator Unit 6. Regulator Unit
Take off the Regulator Unit as shown in the arrow 11 Regulator Unit
direction after removing 11 screws.
Regulator Unit
5
AVR-3803/1083/AVC-3570
7. Component-Video/S-Video / C-video / 7. Component-Video/S-Video / C-video /
Audio in / Ext-in VR / Digital/Remote I/O Audio in / Ext-in VR / Digital/Remote I/O
/ AM FM Tuner Unit (1) 61 Rear Panel
(1) Remove 60 screws to detach the Rear Panel. (2) P.W.B.
(2) Take off the objective P.W.B. upward.
Rear Panel
8. How to Check Power / Control Unit with 8. Powr/Control Unit
Power-on (1) Chassis 17
(1) Remove 17 screws fixing to the Chassis.
(2) Pull up the Unit to separate from the Chassis. (2) Chassis
Chassis
6
AVR-3803/1083/AVC-3570
CAUTION IN SERVICING
Initializing AV SURROUND RECEIVER AV
AV SURROUND RECEIVER initialization should be DSP
performed when the