File name 921-DET-AVR-3803____-S-A01.pdfFor U.S.A., Canada, Europe, Asia, China, Hong Kong, Taiwan R.O.C., Korea & Japan model
SERVICE MANUAL
MODEL
AVR-3803/1083 AVC-3570
AV SURROUND RECEIVER/AMPLIFIER
REMOTE SENSOR
SIGNAL DIGITAL
SURROUND BACK CH OUTPUT
VOLUME LEVEL
ON / STANDBY
AUTO
INPUT PCM
DTS
SIGNAL 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
Remove 3 screws on the rear and 6 screws on both sides to detach the Top Cover as shown in the arrow direction. Top Cover
1. Top Cover
3 6 Top Cover
2. Front Panel
(1) Remove 7 screws from the top and bottom edges of the Front Panel. (2) Release 4 top and bottom Hooks, then detach the Front Panel as shown in the arrow direction.
2. Front Panel
(1) Front Panel (2) Front Panel Front Panel 7 4 Hook
Hook
Front Panel Hook
Hook
Hook
3. Inner Panel
Pull out the Inner Panel in the arrow direction after removing 3 screws.
3. Inner Panel
3 Inner Panel
Inner Panel
4
AVR-3803/1083/AVC-3570
4. Inner Panel Ass'y
(1) Remove 3 round and 1 square knobs, and unscrew 4 nuts. (2) Remove 14 screws fixing each P.W.B.
4. Inner Panel Ass'y
(1) Round Knob 3 Nut (2) PWB Square Knob 1 14 4
Nut Round Knob
Square Knob
Nut
Round Knob
5. Amp Connect Unit/Component Video Unit
(1) Remove 9 screws to detach Pre-out Unit and Component Video Unit. (2) Take off the Amp Connect Unit as shown in the arrow direction after removing 1 screw. Pre-out Unit Amp Connect Unit
5. Amp Connect Unit/Component Video Unit
(1) Unit (2) 1 Amp Connect Unit 12 Pre-out Unit Component Video
Component Video Unit
6. Regulator Unit
Take off the Regulator Unit as shown in the arrow direction after removing 11 screws.
6. Regulator Unit
11 Regulator Unit
Regulator Unit
5
AVR-3803/1083/AVC-3570
7. Component-Video/S-Video / C-video / Audio in / Ext-in VR / Digital/Remote I/O / AM FM Tuner Unit
(1) Remove 60 screws to detach the Rear Panel. (2) Take off the objectiv |