Onkyo T 9090 II Service Manual

Page 1

SERIAL No. 3275

ONKYO SERVICE MANUAL

SYNTHESIZED
FM STEREO TUNER

MODEL T-9090 II

UD, UDN, UDC 120V AC, 60Hz

UG 23-0; AC, SOHZ
UW, UWXD, UWXG 120/220V AC, 50/60Hz
UQA. UQB 340V AC, 50Hz

SAFETYEELATED COMPONENT WARNINGYY TABLE OF CONTENTS

COMPONENTS IDENTIFIED BY MARK f; 0N

Specifications ............................ 2
THE SCHEMATIC DIAGRAM AND IN THE PARTS Service procedures ________________________ 2
LIST ARE CRITICAL FOR RISK OF FIRE AND Exploded View ............................ 4
ELECTRIC SHOCK REPLACE THESE COMPO- PaItSITSC ............................... 5
NENTS WITH ONKYO PARTS WHOSE PARTS CirCUit descriptions _______________________ 6
NUMBERS APPEAR AS SHOWN IN THIS MANUAL. IC block diagram _____________________ 12
Block diagram ........................... 17
MAKE LEAKAGECURRENT 0R RESISTANCE Adjustment procedures ..................... 18
MEASUREMENTS TO DETERMINE THAT EX-
POSED PARTS ARE ACCEPTABLY INSULATED Main circuit ___________________________ 21
FROM THE SUPPLY CIRCUIT BEFORE RETURN Digital/Display circuit ..................... 25
INC THE APPLIANCE TO THE CUSTOMER. ______________________ 27
-parts list ......................... 23
Packing View ............................ 28

ONKYO
LAIIIIIII IIIIMPIIIIIIIIS

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won

SPECIFICATIONS

Tuning Range:

87.5 7 108.0MHZ
(AUTO MODE SOkHz steps,
MANUAL MODE ZSkHz steps)

Usable Sensitivity: Mono: 0:8pV (S/N 26dB, 40kH7
Dev.) DIN
Stereo: 20.0}AV, (S/N 46dB,
40kHZ Dev.) DIN
SOdB Quieting Sensitivity: Mono: 15 .8dBf, 1.7uV
Stereo: 37.2dBf, 20pV
Capture Ratio: 1.0dB
Image Rejection Ratio: lUOdB
IF Rejection Ratio: lOOdB
Signal-to-Noise Ratio: Mono: 95dB (IHF)
Stereo: SSdB (IHF)
Selectivity: 80dB (:SOOkHz, IF: super
narrow)

SERVICE PROCEDURES

1. Replacing the lamp
This unit uses the lamp listed below.
Circuit no. Parts no. Desciption
0754 210064A PL 6.3V, ZSOmA. Dial
plate illumination

2. Safety-check out (D model)
After correcting the original service problem. perform
the following safety check before releasing the set to
the customer:
Connect the insulating-resistance tester between the
plug of power supply cable and tapping screw holding
the back panel and top cover.
Specification: 3.3MQ 110% at 500V

3. Change of De-emphasis

W models are equipped with a 50usec-75nsec selector
switch. This switch is located on the back panel, This
switch is set to 50nsec at the factory. but may have to
be reset to 75psec depending on the area where the unit
is used.

Europe: SOusec

USA; 75usec

AM Suppression Ratio:

Total Harmonic Distortion:

Frequency Response:
Stereo Separation:

Output Voltage:
Dimensions (W X H X D):

Weight:

60dB
Mono: 0.009% (IF: wide)
Stereo: 0.02% (IF: wide)

30 7 15,000Hz (+0.5dB, 71.0113)
SSdB at lkl-lz (IF: wide)

33dB at 70 7 10,000HZ (IF: wide)
0 7 1.5V

465 X 103 X 387mm

18-5/16" X 4-1/16" >< 15-1/4
8.5kg, 18.7lbsi

Specifications and features are subject to change without notice.

4. Change of voltage

W models are equipped with a voltage selector to con-
form with local power supplies This switch is located on
the back panel. Be sure to set this switch to match the
voltage of the power supply in your area before turning
the power switch on.
This switch is set to 220V at the factory. Voltage is
changed by sliding the groove in the switch with the
screwdriver to the right or left. Confirm that the switch
has been moved all the way to the right or left before
turning the power switch on.

5. Memory Preservation

This unit does not require memory preservation bat»
teries. A built-in memory power back-up system preser-
ves contents of the memory during power failures and
even when the unit is unplugged The unit must be plug-
ged in and the power switch turned on and off once in
order to charge the back-up systemi Note that since this
is not a permanent memory. the poWer switch must be
turned on and off a few times each month to keep the
back-up system operable. The period of time during
which memory contents are preserved after power has
last been turned off varies depending on climate and the
location and placement of the unit On the average.
memory contents are protected over a period of 3 to 4
weeks (a minimum of 2 weeks) after the last time
power has been turned off. This period is shorter when
the unit is exposed to very high humidity or used in an
area with an extremely humid climate.

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PACKING VIEW

REF. NO. PART NO. DESCRIPTION REF- 0- PART N01 DESCRIPTION

1 29095318 500 x 800mm, Protection sheet 220V/240V models

2 29100038A 720 X 950mm, Poly-vinyl bag 2010097 ConnectiOn cord

3 282301 Sealing hook 24140013 RC-113T, Remote control unit

4 29051604 Master carton box 25060088 Two adaptors for FM antenna

5 29091197 Pad R 292064A FM antenna

6 29091196 Pad L 29341192 Instruction manual

7 262037 200mm, Drafting tape 29341208 Instruction manual I

8 261504 30mm. Tape 3010054 UM}. Two batteries

9 260012 100cm,Damplon1ape 29100097 250 X 350mm,Poly-viny1bag

10 29095491 Sheet P Worldwide models

1 1 Accessary bag assy 2010097 Connection cord
120V models 24140013 RC-113T, Remote control unit
2010097 Connection cord 25060088 Two adaptors for FM antenna
24140013 RC-113T, Remote control unit 292064A FM antenna
25060088 Two adaptors for FM antenna 29341191 Instruction manual (Only PX model)
290264A FM antenna 29341192 Instruction manual
29341191 Instruction manual 25055040 CV-K-Z, Conversion plug
3010054 UM3, Two batteries 3010054 UM3, Two batteries
293650064 Warranty card (Only U.S.A model) 29365021 Warranty card (Only PX model)
2935800212 Service station list (Only U.S.A model) 2935800215 SEIVICC Statim list (Only PX model)
29100097 250 x 350mm, Poly-vinyl bag 29100097 250 x 350mm, Poly-vinyl bag

ONKYO CORPORATION

International Diwsuon No.24 Mon Bldg, 235. 3-chome. leh|~ShInbashi, Minaloku, Tokyo. Japan
Telex. 2423551 ONKVO J Phone: 03432-6981

ONKYO U.S.A. CORPORATION

200 Wiltlarns Drive. Ramsey N.J. 07446 Tel 2018257950

> 28 4 1x N. 0M3257 NS709 Printed inJapan