Onkyo PTS 305 Service Manual

Page 1

PTS-303/505/707
PTS-307/507/707

Ref. No.3546-2

ONKYO® SERVICE MANUAL

Personal Theater System
FM STEREO/AM TUNER AV AMPLFIER

PTS-303I307/505/507/707
(RY-303/307/505/507f707)

PTS-303/5 05/707
(RY-303/505/707)

UDN

120V,60Hz
U.S.A model

(RY-307/507/707)

PTS-303/505/707 UM

220V/230V»240V,50Hz
Asian model

SAFETY-RELATED COMPONENT WARNINGII
COMPONENTS IDENTIFIED BY MARK A ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.

MAKE LEAKAGE»CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

TABLE OF CONTENTS

SERVICE PROCEDURES ..
SPECIFICATIONS ...............
ADJUSTMENT PROCEDURE ..

.. 2
..2
3

EXPLODED VIEW .....................
EXPLODED VIEW PARTS LIST
MICROPROCESSOR CONNECTION DIAGRAM I
TERMINAL DESCRIPTION .......................
IC BLOCK DIAGRAMS

PRINTED CIRCUIT BOARD PARTS LIST I

.. 14
15
16
17
18
22

SCHEMATIC DIAGRAMS ...................... 31

ONKYOg
MIIIIII IIIIIIPIIIIIIIIS

_1_

Page 2

TS-303/505/707
TSr307/507/707

SERVICE PROCEDURES

1.Safety-check out

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 cord and chassis.

Specifications : More than 10 Mohm at 500V.

2. Replacing the fuses
For continued protection against fire hazard, replace only
with same type and same rating fuse.

Circuit No. Part No Description
F551 40035-1 T2.5A/250V
model RY-707
4-0039-1 TSA/ZSOV
mode] RY»707
4-0040v1 T4A/250V
model RY-303/505
F552 4-0041<1 T4A/250V
model RY-307/507
4-0042-1 T2.5A/250V
mode] RY-303/505/707
4-0043-1 T2.5A/250V

model RY-307/707
NOTE: 120V model only
Asian model only

SPECIFICATIONS

Amplifier Section
Power Output:
Front: 70W x 2 at 8 ohm train 40 Hz to 15 kHz

with no more than 0.9% THD

(model: RY-707)
50W x 2 at 3 ohm Irom 40 Hz to 15 kHz
with no more than 0.9% THD

(models: RY-SOII, 307, 505, 507)

30W (3.0% THD.1 kHz, 8 ohm)
(model: RYA7O7)

20W (3.0% THD,1 kHz, 8 ohm)
(models: RY-SOS. 507)

Center:

15W x 2 (8.0% THD,1 kHz. 16 ohm)
(model: RY»7D7)

10W x 2 (3.0% THD. 1 kHz, 16 ohm)
(models: RV-SOS. 507)

S/N: 89 dB (IHF-A)

Surround:

PM Section
Tuning Range: 87.9 - 1079 MHz

(USA. and Canadian models)
87.5 -108r0 MHZ

(Asian models)

(Asian models: 50 kHz step U.S.A. and

Canadian models: 200 kHz step)

3. Voltage Selector (Rear Panel)

Asian model are equipped with a voltage selector to
conform to local power supplied.

Be sure to set this switch to match the voltage of the
power supply in your area before plugging in the unit.
Models without a voltage selector can only be used in
area where the power supply is the same as that of the
unit.

VOLTAGE SELECTOR

III] |
L.

230-240V

<_l

220V 220V 230-24C

at AC 230-24OV at AC 220V
Setting the voltage selector
1. Determine the proper for volmge for your area : 230-
240V or 220V.

2. If the preset voltage is not proper for your area, insert
a screwdriver into the groove in the switch. Slide the
switch all the way to the right (230<240V) or to the left
(220V), which-ever is proper.

AM Section
Tuning Range: 520 - 1710 kHz. 10 kHz step
(U.S.A. and Canadian models)
522 - 1620 kHz, 9 kHz step
(Asian models)
General

120V AC, 60 Hz (USA. and Canadian models)
220/230 - 240V AC, 50/60 Hz (Asian models)
Tuner/Amplifier unit

270 x185 x 322 mm

(105/8 x 7-5/16 X12-11/16'In.)

Power Requirement:

Dimensions:
(w x H x D)

Page 3

Equipment required:
1. AM signal generator
2. FM signal generator

3. VTVM
4. DC voltmeter

5. FM/AM IF sweep generator

6. Oscilloscope

ADJUSTMENT PROCEDURES

Notes:

1. Signal input must be as low as possible to avoid overload and
clipping. (Use highest sensitivity of output indicator.)

2. Volume control at maximum.

3. Standard modulation is 4001-12 at 30% amplitude for AM,
10001-12 at 22.5k1-12 deviation for FM (Mono).

4. Connect 8 ohm load acros speaker terminal.

AM 1F Adjustment
. Signal Generator Frequency .
Signal Source Frequency Output Setting Adjustment Remarks
AM 1F sweep . Adjust for
generator Sweep centered 2055;361:3313 1000 kHz [FF 2 maximum &
connected to 450kHz in 18 of1C1 symmetrical
AM antenna. p curve.
DC voltmeter , DC voltmeter
SZOkHz (522kHz) m TP VCO 520kHz (SZZkHL) L32 0.8V i0.05V
AM . '1 . 1: Adjust for
End 610kH7. (612 kHz) meme 0 610kHz (612kHz) L31 maximum
generator speaker out
i put
connected to termmal
AM nema- l400kHz 1400kHz TC]
(1404kHz) (l404kHZ)
Repeat adjustments as necessary to minimise tracking error.
FM IF Adjustment
. Signal Generator Frequency - ,
Signal Source Frequency Output Setting Adjustment Remarks
FM 1F sweep . Adjust for
generator Sweep centered SSEiielgfggrt): 98MH2 IFT 1 on the maximum &
connected to FM 10.7MHz . front end symmetrical
pm 18 of 1C1.
antenna. curve.
FM RF Adjustment
Signal Source Signal Generator Output quuiemy Adjustment Remarks
Frequency Setting
DC meter to
, DC voluneter 87.9MHz . .
FM signal 875M 60; [0 TP vco (875MHz) L10 2 zcflcggsv
generator ' m
connected to FM VTVM _
antenna. connected to L3, L17, L19 Adjust for
98MHZ 98M1-12 on the front maxrmum
speaker
terminal end output

PTS~303/5 07
PTS-307/507/707

Page 8

TERMINAL DESCRIPTION

Porl Nam
G I
G l 6
C N
MODEL}
MOD

inal
terminal
terminal
command clock
IC command dala
Surround lC
Sub m from

S m' resei
M Sub m command c
SM-DATA I data
MSVDAT Sub m dala
command clock
Tuner from dalai
uner dam on
sundard VOI
uner from lcclion
mand selection
uner from corn on

uner receivi

Slcreo
conneclin delecie

drive v La
PF
PF select l
PF selecl
mand ou
ommand data on

-17-

0000000000 0

OO

O

PTS-303/505/707

PTS-307/507/707

Level A in l
B sensor s selection
Comm and
Gals
IC
0 u IC scleclion
Not used
clock
Cammand data
1C selection
ve
drive
matrix dri
LED matrix drive
Power 1
mule control ule on:
FL lube anode
FL lube
anode
lube anode
FL rub: anode
FL anode
FL rube anode

tube anode
FL anode
FL mm: anode
FL tube anode
FL
Fl. tuhc anode
tube
FL m
In on
lube anode cu
FL lube

tube
5V