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FR-155


Ref. No. 3662
092000




CD/MD TUNER AMPLIFIER
MODEL FR-155




Silver model
UDT 120V AC, 60Hz
UGT 220 -230V AC, 50/60Hz


TABLE OF CONTENTS
Specifications -----------------------------------------------------------
2
Caution on replacement of optical pickup --------------------------- 2
Protection of eyes from laser beam during servicing --------------- 3
SAFETY-RELATED COMPONENT WARNING!! Laser Warning Label---------------------------------------------------- 3
Service procedures -----------------------------------------------------3
COMPONENTS IDENTIFIED BY MARK ON THE Front panel view --------------------------------------------------------
4
Connecting to Other Components------------------------------------ 5
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE Remote controller -------------------------------------------------------
6
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. Setting the day of the Week and the Time---------------------------- 6
REPLACE THESE COMPONENTS WITH ONKYO IC Block diagram and descriptions ----------------------------------- 7
Microprocessor Connection Diagram--------------------------------- 15
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN Microprocessor Terminal Description-------------------------------- 16
IN THIS MANUAL. Operation of the Microprocessor-------------------------------------- 17
MD Mechanism Exploded view-------------------------------------18~19
MAKE LEAKAGE-CURRENT OR RESISTANCE MD Mechanism Disassembly ---------------------------------------- 20,21
MD Mechanism Reassembly ----------------------------------------22
MEASUREMENTS TO DETERMINE THAT EXPOSED MD Adjustment Procedures ------------------------------------------ 23~25
PARTS ARE ACCEPTABLY INSULATED FROM THE MD Mount View / Messages-------------------------------------------- 26
SUPPLY CIRCUIT BEFORE RETURNING THE CD Mechanism Exploded View --------------------------------------- 27,28
CD Adjustment Procdedure------------------------------------------- 29
APPLIANCE TO THE CUSTOMER. Clock Adjustment Procdedure----------------------------------------- 30
Handling of Pickup----------------------------------------------------- 31
Chassis Exploded View Parts List------------------------------------ 32
Chassis Exploded View ------------------------------------------------ 33
Block Diagram---------------------------------------------------------- 35
Block Diagram (Power Supply Section)------------------------------ 37
Schematic Diagram (Amplifire Section)----------------------------- 39
Printed Circuit Board View 1------------------------------------------ 41
Schematic Diagram (CD&Microprocessor Section)---------------- 43
Printed Circuit Board View 2------------------------------------------ 45
Schematic Diagram (Power Supply Section)----------------------- 47
Printed Circuit Board View 3------------------------------------------ 49
Printed Circuit Board View Parts List-------------------------------- 51~54
Wiring View-------------------------------------------------------------55
Packing View Parts List------------------------------------------------ 57
FR-155


SPECIFICATIONS
General MD recorder
Power supply AC 220-230 V, 50/60 Hz Signal readout system Optical non-contact
AC 120 V, 60 Hz Recording time 320 minutes maximum
Power consumption 63 W (220-230 V, 50/60 Hz) (at LP4 mode)
82 W (120 V, 60 Hz) Frequency response 10 Hz to 20 kHz ( 3 dB)
(Standby) 7W Wow and flutter Below threshold of
(Energy Save) 1.5 W measurability
Clock precision monthly error: 30 seconds Tuner
(at 25 degrees Celsius)
Dimensions (W × H × D) 205 × 154 × 356 mm Tuning range FM: 87.50 to 108.00 MHz
8-1/16" × 6-1/16" × 14" (50 kHz steps)
Weight 5.5 kg, 12.1 lbs AM: 522 to 1611 kHz
(9 kHz steps)
Amplifier Usable sensitivity FM Mono:11.2 dBf,
1.0 µV (75 W IHF)
Power output 2 × 26 W at 4 W EIAJ Stereo:17.2 dBf,
2 × 21 W at 6 W EIAJ 2.0 µV (75 W IHF)
Rated Power AM: 30 µV
2 × 19 W min, RMS at 4 W 50 dB quieting sensitivity FM Mono:17.2 dBf,
1 kHz no more than 2.0 µV (75 W)
0.2 % THD Stereo:37.2 dBf,
Dynamic power 2 × 23 W at 4 W 20.0 µV (75 W)
Total harmonic distortion 0.4 % at rated power Capture ratio 2.0 dB
IM distortion 0.2 % at rated power Image rejection ratio FM: 85 dB
Damping factor 25 at 8 AM: 40 dB
Sensitivity and impedance LINE, TAPE: IF rejection ratio FM: 90 dB
150 mV, 50 kW AM: 40 dB
CDR: 150 mV, 50 kW Signal to noise ratio FM Mono : 73 dB IHF
Frequency response 10 to 50,000 Hz : +0dB / -3 dB Stereo : 67 dB IHF
Tone Control S.BASS1: +4 dB at 40 Hz AM: 40 dB
S.BASS2: +8 dB at 50 Hz Selectivity FM: 50 dB
S.BASS3: +4 dB at 10 kHz/ ( 300 kHz at 40 kHz devi.)
+8 dB at 50 Hz Harmonic distortion FM: Mono: 0.7 %
Stereo: 0.3 %
Signal to noise ratio LINE, CDR, TAPE: 100dB AM: 0.7 %
(IHF-A) Frequency response FM: 30 to 15,000 Hz ( 1.5 dB)
Muting 50 dB Stereo separation FM: 40 dB at 1,000 Hz
FM: 30 dB at 100 to 10,000 Hz
CD player
Specifications and features are subject to change without noitce.
Signal readout system Optical non-contact
Frequency response 10 Hz to 20 kHz ( 3 dB)
Wow and flutter Below threshold of
measurability

CAUTION ON REPLACEMENT OF OPTICAL PICKUP
The laser diode in the optical pickup block is so sensitive to During repair,carefully take the following precautions.
static electricity, surge current and etc., that the components (The following precautions are included in the service
.
are liable to be broken down or its reliability remarkably parts.)
deteriorated.
PRECAUTIONS

1.Ground for the work-desk. 3. Grounding for the human body.
Place a conductive sheet such as a sheet of copper Be sure to put on a wrist-strap for grounding whose
(with impedance lower than 10 Mohm) on the work- other end is grounded.
desk and place the set on the conductive sheet so that Be particularly careful when the workers wear
the chassis can be grounded. synthetic fiber clothes, or air is dry.
2.Grounding for the test equipments and tools. 4. Select a soldering iron that permits no leakage and
Test equipments and toolings should be grounded in have the tip of the iron well-grounded.
order that their ground level is the same the ground of 5. Do not check the laser diode terminals with the
the power source. probe of a circuit tester or oscilloscope.

2
FR-155


PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
This set employs a laser. Therefore, be sure to follow carefully Laser Diode Properties
the instructions below when servicing.
Material: GaAS/GaALAs
WARNING!! Wavelength: 780nm
SERVICE WARNING : DO NOT APPROACH THE Laser output: max. 0.5mW*
LASER EXIT WITH THE EYE TOO CLOSELY. Emission Duration: continuous
IN CASE IT IS NECESSARY TO CONFIRM LASER *This output is the value measured at a distance about 1.8mm
BEAM EMISSION, BE SURE TO OBSERVE FROM from the objective lens surface on the Optical Pick-up Block.
A DISTANCE OF MORE THAN 30cm FROM THE
SURFACE OF THE OBJECTIVE LENS ON THE
OPTICAL PICK-UP BLOCK.

LASER WARNING LABEL
The label shown below are affixed.
1. Warning label 2. Class 1 label


LUOKAN 1
LASERLAITE
"CLASS 1 LASER
KLASS 1
PRODUCT" LASER APPARAT




SERVICE PROCEDURE
1. Replacing the fuses 3. Safety-check out
(Only U.S.A. model)
This symbol located near the fuse indicates that the After correcting the original service problem perform the
fuse used is show operating type, For continued protection against follwing safety check before releasing the set to the customer
fire hazard, replace with same type fuse , For fuse rating, refer to Connect the insulating-resistance tester between the plug of
the marking adjest to the symbol. power supply cord and terminal GND on the back panel.
Specifications: More than 10Mohm at 500V
Ce symbole indique que le fusible utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme 4. Memory Preservation
type. Ce demier est indique la qu le present symbol est apposre. This unit does not require memory preservation batteries. A built-in
memory power back-up system preserves the contents of the
REF.NO. PART NO. DESCRIPTION memory during power failures and even when the unit is un-plugged.
F901 252157 1.25A-UL/T-237, Fuse
The unit must be plugged in order to charge the back-up
252083 0.4A-SE-EAW, Fuse system.
NOTE :
: 120 V model only The memory preservation period after the unit has been unplugged
: 220 V~230 V model only varies depending on climate and placement of the unit. On the
average, memory contents are protected over a period of a few
weeks after the last time the unit has been unplugged. This period
2. To initialize the unit
is shorter when the unit is exposed to a highly humid climate.
1. Press and the hold down the CD STOP button , then press the
STANDBY/ON button. 5. Changing the AM band step
2. After " All lighting " is displayed, the preset memory and each With the exception of the worldwide models, a tuning step selector
mode stored in the memory, are initialized and will return to the switch is not provided. When you change the band step, change
factory settings. the parts as shown below.
3. Press the STANDBY/ON button.

4. Unplug the AC plug from the wall outlet. To 10kHz To 9kHz
R748 open 1 kohms
R749 1 koms open
R748 and R749 on the microprocessor PC board (NADG-6933)

3
FR-155


FRONT PANEL VIEW


CD / MD TUNER AMPLIFIER MD button
MD button
MD disc slot DISC LOADING MECHANISM

MD button
CD / MD

CD/MD button
FM /AM

FM/AM button
VOLUME control OTHER
INPUTS
OTHER INPUTS button
WIDE RANGE AMPLIFIER
TECHNOLOGY REC
VOLUME
MD REC button
ACOUSTIC PRESENCE CD DUBBING

CD DUBBING button
STANDBY / ON
ACOUSTIC
PRESENCE MODE
STANDBY/ON button DISCRETE OUTPUT STAGE MODE button
AUTO / MONO
AUTO/MONO button
ENERGY SAVE

ENERGY SAVE button MIN MAX CD button
/indicator
MULTI JOG dial
CD disc tray
EDIT/CLEAR/NO button
DISPLAY button REPEAT/YES button
DISPLAY EDIT / CLEAR
REC MODE
MONO
SP
LP2
TIMER
MULTI JOG NO
REPEAT
CD button
REC MODE switch LP4
CD button
TUNING YES

Remote control sensor PUSH TO ENTER
PHONES



PHONES jack

/ buttons
TUNING / buttons TIMER button




DISPLAY


TIMER indicator MD indicator
CD indicator
MD/CD setting indicators
SOURCE indicator
Multi-purpose display

SLEEP SOURCE CD TIMER MD MD CD
ONCE
Timer indicators W.DAY
W.END
REC
CH CH (channel) indicator
MUTING LEVEL-SYNC DIGITAL CHAIN
REPEAT
DISC TRACK ELAPSED REMAIN TITLE When lit, the indicators show
L MONO AUTO STEREO TUNED
Recording level indicator - - 40 - 20 -10 -6 - 2 0 OVER 1 TR MEMORY CD MD what the mulit-purpose display
DUB TOC
R RANDOM ( Multi-purpose display) above
them is currently displaying.
MUTING indicator
LEVEL-SYNC indicator TOC indicator
DIGITAL indicator MD operation indicators
Playback mode indicators DUB indicator

CD operation indicators

Indicators for radio frequency
information




4
FR-155


CONNECTING TO OTHER COMPONETS
Connecting an Onkyo stereo Connecting an Onkyo compact
cassette tape deck disc recorder
The illustration below describes the connections to an Onkyo stereo The following diagram shows how to connect an
cassette tape deck. To connect to another cassette tape deck, connect the optional Onkyo compact disc recorder to the FR-155.
TAPE OUT (REC) and IN (PLAY) jacks of the unit to the INPUT (REC) and Connect its CDR OUT (REC) jacks and IN (PLA Y)
OUTPUT (PLAY) jacks of the cassette tape deck, respectively. jacks to the disc recorderÕ INPUT (REC) jac ks and
s
Onkyo stereo cassette OUTPUT (PLAY) jacks respectively.
: Signal flow tape deck rear panel
white INPUT OUTPUT : Signal flow Jacks on the compact disc
(REC) (PLAY) REMOTE
CONTROL
ANALOG recorder's rear panel
INPUT OUTPUT REMOTE
Audio L
(REC) (PLAY) CONTROL DIGITAL
OPTICAL
connection red L L INPUT1 INPUT2 OUTPUT

cable
R
R R

K L
LINE-1 LINE-2 TAPE CDR
OUT IN OUT IN

L L

red white
R R

(REC) (PLAY) (REC) (PLAY)
Audio connection cable
FR-155's rear panel LINE-1 LINE-2 TAPE CDR
OUT IN OUT IN

L L
DIGITAL SUB Audio connection
OUT IN WOOFER
REMOTE
CONTROL PRE OUT cable
R R

(REC) (PLAY) (REC) (PLAY)
cable supplied with
OPTICAL
the Onkyo stereo FR-155's rear panel
cassette tape deck DIGITAL SUB
Rear Panel View OUT IN
REMOTE
CONTROL
WOOFER
PRE OUT




OPTICAL
LINE-1 LINE-2 TAPE CDR
OUT IN OUT IN

L L


Connecting a portable MD player R R
AM
(REC) (PLAY) (REC) (PLAY) An cable that comes Optical fiber audio cable
SPEAKERS
CAUTION:SPEAKER IMPEDANCE ­ +
Refer to the portable MD playerÕs Instruction Manual. ANTENNA
4 OHMS MIN. / SPEAKER

L
with the compact disc recorder
DIGITAL SUB
OUT IN WOOFER
FM REMOTE
CONTROL PRE OUT

: Signal flow 75

R The jack connection enables you to use the
OPTICAL ­ +
following functions:
„ You can control a connected Onky o compact disc
recorder from the FR-155' s remote controller.
LINE-1 LINE-2 T „ When the connected Onky o compact disc recorder
OUT

white plays bac k, the Input Selector on the FR-155 is
L
automatically switched to CD-R.
„ To connect both CD recorder and a cassette tape
R
Audio red deck to the FR-155, connect the connectors of
connection (REC

cable both devices .




Connecting a DVD player
In addition to the optical digital audio connections,you must also
make analog connections.To connect to the Onkyo DVD player, be
sure to connect to the LINE-1 jacks with the audio connection cable,
not the LINE-2 jacks. Connecting a subwoofer
The FR-155 has a SUBWOOFER PRE OUT jack. Connect
DVD player an active subwoofer (a subwoofer that contains an amplifier),
or connect an amplifier to the FR-155, then connect a non-
Digital Analog active subwoofer to the amplifier.
audio audio output
output Active subwoofer
L R
(with a built-in amplifier)
FR-155's rear panel SUB
WOOFER
LINE-1 LINE-2 TAPE PRE OUT

OUT

white L



R
Audio connection red
Subwoofer
cable (REC) (PL
(without a built-in amplifier) Amplifier
Optical fiber
audio cable DIGITAL S
OUT IN WO
REMOTE
CONTROL PR




: Signal flow OPTICAL
: Signal flow

5
FR-155

REMOTE CONTROLLER

SLEEP button
STANDBY/ON SLEEP
CLOCK
CALL
CLOCK CALL button
STANDBY/ON button DIGITAL



CDR/TAPE/LINE/DIGITAL buttons CDR TAPE LINE1 LINE2


CD button INPUT

CD MD FM AM
FM/AM buttons
MD button
1 2 3 4




Number buttons 5 6 7 8

A.PRESENCE
9 10/0 --/---
A.PRESENCE button
VOLUME UP

/TAPE REW button /TAPE FF button
TAPE REW TAPE FF

MUTING button MUTING
VOLUME / buttons
button VOLU
button
CD/MD/CDR MEDOWN
MODE CD

MODE button CD operation buttons
REPEAT MD

REPEAT button MD operation buttons
CLEAR CDR

CLEAR button Operation buttons for an Onkyo CDR
SCROLL TAPE

SCROLL button Operation buttons for an
REMOTE CONTROLLER Onkyo stereo cassette tape deck
RC-434S




SETTING THE DAY OF THE WEEK AND THE TIME
You can select either the 12-hour display or 24-hour displa y. (This section explains how
to set the time based on the 24-hour display.)
Press TIMER repeatedly until
1 "Clock" appears in the display.
TIMER

SLEEP SOURCE C D TIMER MD MD CD
ONCE
W.DAY
W.END CH
REC
S.BASS MUTING LEVEL-SYNC DIGITAL CHAIN DISC TRACK ELAPSED REMAIN TITLE
L REPEAT RDS MONO AUTO STEREO TUNED
- - 40 - 20 - 10 -6 - 2 0 OVER 1 TR MEMORY CD MD
R RANDOM
DUB TOC
2-6
DISPLAY EDIT/
2 Press MULTI JOG.
1 CLEAR/NO
MULTI JOG SLEEP
ONCE
SOURCE C D TIMER MD MD CD

W.DAY
W.END CH
REC
S.BASS MUTING LEVEL-SYNC DIGITAL CHAIN DISC TRACK ELAPSED REMAIN TITLE
L REPEAT RDS MONO AUTO STEREO TUNED
- - 40 - 20 - 10 -6 - 2 0 OVER 1 TR MEMORY CD MD
DUB TOC
R RANDOM




PUSH TO ENTER You can now set the day of the week. 5 Turn MULTI JOG to set the current time .
(This example sho ws the 24-hour display.)
If you prefer the 12-hour displa y, press MULTI JOG
DISPLAY. SLEEP
ONCE
SOURCE CD TIMER MD MD CD

W.DAY
W.END CH
REC



3MULTI JOG
Turn MULTI JOG to select the
current day of the week.
S.BASS MUTING LEVEL-SYNC DIGITAL
L
R
- - 40 - 20 - 10 -6 - 2 0 OVER
CHAIN
REPEAT
1 TR MEMORY
RANDOM
DISC TRACK ELAPSED REMAIN TITLE
RDS MONO AUTO STEREO
CD
DUB
MD
TUNED