AMSTRAD TS80 User manual

Stas
vo
canst nan BIBL SSSR
oe
5
i
‘
TS80 / TS88
REMOTE CONTROL
TOWER SYSTEM
SERVICE MANUAL
fee
Price: £3.50

CONTENTS |
General Routine Maintenance
Trouble Shooting Guide
Safety Test Procedure
Alignment Instructions
Cabinet Drawing and Parts List
Dial Cord Stringing
Cassette Mechanism and Parts List
Cassette Deck Alignment and Maintenance
Record Deck Drawing
Record Deck Parts List
Chassis Drawing
Chassis Parts List
Main PCB
~TS80 PCB’s 2-5
TS88 PCB’s 2-5
TS88 Tape 11 PCB 10
TS80 VU Meter PCB
Electrical Parts List
IC Pin Voltages
TS80 Circuit Diagram
TS88 Circuit Diagram .
OONN DAA
—_
©
11
Middle Spread
21
22 & 23
24
Inside Back Cover
Back Cover
GENERAL ROUTINE MAINTENANCE
- -AMPLIFIER SECTION
Power Output
Frequency Response
Distortion
Graphic Equaliser
Filters
Signal to noise ratio
TUNER SECTION
FM Section
MW Section
LW Section
FM Sensitivity
FM Aerial Input
CASSETTE SECTION
Tape
Tape Speed
Tracks
Wow and Flutter
Distortion
Frequency Response
Noise Reduction
Microphone Sensitivity
TURNTABLE
Cartridge
Transmission
Speed Control
REMOTE CONTROL UNIT
Method of Transmission
Volume up/down
Balance left/right
Bass up/down
Treble up/down
Batteries
DIMENSIONS AND WEIGHTS
Main Unit
Weight
Speakers
Weight
Mains Voltage
The following cleaning and maintenance should be carried out on a regular basis:
1) Always ensure that the stylus is clean and properly located in the cartridge.
8 Watts RMS per channel
into 4 ohms
32 watis Total Peak Music Power
30Hz — 20KH2
1% @ 1KHz Full Power
0.2% @ 1KHz half Power
50Hz2 +12dB
150Hz +.12dB
400Hz + 12dB
KHz + 12cB
2.5KHz +12dB
5KHz + 12dB
15KHz +.12dB
Scratch —10dB @ 12KHz
Rumble —10d8 @ 40Hz
Loudness
+10dB @ 100Hz at max. vol.
+6dB @ 10KHz —30dB
Better than 55dB
86.5-— 109MHz
525 ~— 1650KHz
140 — 280KHz
5uV
75ohms
Cassette Type
4.75cm per second
2 Track Stereo
0.15% WRMS
1% @ 1KHz
80Hz —6KHz Standard Tape
60Hz — 8KHz Chrome Tape
60H2— 10KHz Metal Tape
—10dB @ 10KHz
0.5mV — 6000nm
BSR P267
SC12M
Bett Drive
Electronic
infra Red-Pulse Position
Modulation (PPM)
OdB max —80dB min
—25dB attenuation per channel
+.10dB @ 100Hz
+10dB @ 10KHz
2x 1.5V Leak Proof Type:
Hitachi Maxell 200.
Ever Ready R6PP
or equivalent
86cm (h) x 42cm (w) x 37cm (a)
29.0Kg
49cm (h) x 27cm {w) x 13cm (d)
4kg each
220— 240V AC 50Hz
2) Werétommend regular cleaning of the heads and the pinch roller of the cassette deck and there are two ways of
cleaning these parts:
tl. using a cotton bud and methylated spirits.
To clean the relevant paris, you should press the ‘eject’ button so that the door is open. Ensure that the
power is switched off, then press the ‘play’ key, which will raise both heads and the pinch roller which can
then be cleaned with the cotten bud and methylated spirits.
ie using a commercial ‘head cleaning’ cassette as per the manufacturers instructions.
When carrying out this operation, please be careful not to exert tco much force on the cassette door as this may cause
damage.
Whilst it is appreciated that using a head cleaning cassette is a more convenient methad, this does tend to have a some-
what abrasive action and may increase the wear of the heads.
The cassette parts should be cleaned after approximately 25 hours use. However, it may be necessary to clean the
cassette mechanism at specific instances as some cassettes themselves have a deposit of oxide dust which may be
deposited on the relevant parts.
SAFETY TEST
continued electrical safety.
APT ARRANGE
PLEASE NOTE: When any work is compieted on this unit, correct safety tests must be carried out to ensure
PLEASE NOTE: All parts shown with the part number prefix ‘S’ are Safety Items and must be replaced with similar
items having an identical safety specification.
All of these items may be purchased direct from AMSTRAD COMSUMER ELECTRONICS PLC
A A RSA SN OA: RM EE RET SARTRE TE, PER IPE MR Ee Rte TY AU AY FER aS SE ARTO COR TEERES
-

GENERAL TROUBLE SHOOTING GUIDE
All functions on unit fail to operate. Lack of power supply. Check mains plug/mains fuse.
All functions fail to operate except Fuse F501 blown. Replace. |
record deck mechanism. {f fuse continues to blow, check for Check and replace as necessary.
faulty mains transformer or meter
bulbs.
If fuse still continues to blow.
Circuit fault somewhere in area of
power supply. Check and replace
as necessary.
Replace as necessary.
Check Bridge Rectifier or Power IC.
General circuit fault. Check and
repair as necessary.
Re-locate.
Fuses 502 or 503 blown.
If either fuse continues to blow.
If fuse stili continues to blow.
All functions fail to operate except
record deck mechanism
Connecting plug between cassette
section and main amplifier not
locating properly.
Aerial not connected or aerial faulty.
VU LEDs not working.
Check aerial and replace or repair as
necessary.
General circuit fault in FM stage.
Check and repair as necessary.
Repair/replace as necessary.
General FM circuit fault. Check and
repair as necessary.
Re-align decoder (see alignment
instructions).
Replace.
FM Tuner section selects no station
but gives loud hiss.
If there is no fault in the aerial.
Poor aerial: 750hm downlead broken.
lf aerial and leads are ok.
FM Tuner gives some sound but
poor quality.
FM works, but stereo light in- Decoder incorrectly aligned.
operative.
LED faulty.
Check decoder IC UPC1197C.
lf UPC1197C ok,
fault is probably C203
(470pf Poly).
incorrect alignment.
If alignment correct.
Check and replace as necessary.
Check and replace as necessary.
Check and re-align as necessary.
Circuit fault. Repair as necessary.
N.B. If replacing any components on
the AM section, the set must be
re-aligned.
Repair as necessary.
AM radio section (MW/LW)
inoperative or very weak.
Wire disconnected from power
supply.
Motor fault. Belt disconnected.
Stylus damaged.
Stylus not located correctly in
cartridge.
Cartridge faulty. Replace.
Cartridge faulty. Replace.
Wiring between cartridge and amplifier
section disconnected.
Belt slipping or stretched.
Record deck fails to operate
mechanically.
Repair/replace as necessary.
Replace.
Re-locate.
Record deck operates mechanically
but gives weak or distorted sound on
both channels.
Record Deck operates mechanically
but gives no sound on either or one
channel.
Clean, relocate or replace as
necessary.
Record deck wow or flutter.
Check and replace as
necessary.
Record deck speed control Speed control IC faulty.
inoperative.

| Symptoms | Fault | Cure
Connecting plug between cassette
section and main amplifier not
locating.
Motor faulty.
Drive belt not tn position.
Cassette deck mechanism not turning.
Cassette jammed.
General mechanical fault in
cassette mechanism.
Cassette speed varies (wow and
flutter) Drive belt in incorrect position.
Motor faulty.
General: mechanical fault in
cassette mechanism.
Dirty or worn pinch roller assembly.
Dirty R/P Head.
R/P Head picks up dust deposit
almost constantly.
R/P Head worn.
Poor quality of recording or
playback.
Pinon connecting plug between
cassette circuit and amplifier circuit
not locating properly.
Generali electronic fault on
Cassette
Faulty erase head.
Wire disconnected from erase head.
Faulty oscillator coil (L303).
When making new recordings, old
recordings not erasing properly.
Re-locate.
Check and replace as necessary.
Re-position drive belt. Check for
stretching of the belt and replace if
necessary.
Replace cassette.
Check and repair as necessary .
Clean or replace as necessary.
Re-position drive belt or replace if
worn or stretched.
Check and replace as necessary.
Check and repair as necessary.
Clean as necessary.
Head requires demagnetisation.
Replace.
N.B. Please refer to cassette
re-alignment instructions.
Re-locate plug correctly.
Check and repair as necessary.
Replace.
Repair as necessary.
Check and replace as necessary.
Faulty leads from main amplifier
and cassette.
LEDs faulty.
VU LEDs not working correctly.-
Check and repair as necessary.
Replace and re-adjust.
Severe hum on one or both channels
with volume at minimum.
Output IC faulty.
Check and replace.
Hum on one or both channels at General circuit fault.
high volume only.
Check and repair as necessary.
Check speaker and speaker leads
by reversal.
Output IC faulty.
One channel not working.
One channel not working and
blows fuse(s) 502 or 503.
Volume or tone controls crackling
when operated.
Output LEDs not working correctly.
Faulty LEDs.
Fault on LED PCB.
Headphone socket faulty.
Lead disconnected between ‘phone
socket and speaker socket.
Speaker socket faulty.
Faulty speaker.
Check by reversal of speakers.
If reversal of speakers demonstrates
fault in amplifier section, faulty
power IC.
If fault condition persists, general
amplifier fault.
Sound through headphones but not
speakers, one or both channels.
One speaker gives distorted sound.
Repair or replace as necessary. |
Check and replace as necessary.
ee
Dirty or worn potentiometers. Spray with switchclean or replace |
if necessary.
Replace as necessary.
Check and repair as necessary.
Check and replace.
Check and repair as necessary.
Check and replace as necessary.
Repair and replace as necessary.
Check and replace.
Check and repair as necessary.

SAFETY TEST PROCEDURE
These tests should be applied to the set after any work is carried out. These tests must be
done to the set before the six screw blanking plates are fitted to the cabinet.
REQUIRED TEST EQUIPMENT
1. Flash Test Generator capable of testing at 2.2kV AC.
2. Megger tester rated at 500V DC.
3. Instrument capable of testing resistance down to 0.10hm at 10amps.
TEST PROCEDURE
1, Stand on bench clear of all metal objects.
No leads should be connected to the unit.
Ensure that the on/off switch is in the ON position.
2. Set Flash test generator to 2.2kV AC.
Connect 1 pole to the live and neutral mains lead connected together and flash test the
following points:
a) The headphone socket ring.
b) The rings of both microphone sockets.
C) The record deck transit screw.
d) All control Knobs and buttons.
e) The underneath of the front panel, below the RECORD LEVEL knob.
f) The back panel.
a: Connect the megger tester to the live and neutral mains lead connected together and
megger test the following points:
a) The headphone socket ring.
b) The rings of both microphone sockets.
Cc) The record deck transit screw.
d) All control Knobs and buttons.
e) The underneath of the front panel, below the RECORD LEVEL knob.
f) The back panel.
4. Check that the earth lead continuity is below 0.5 ohms at 10amps between the mains earth
lead core and the record deck transit screw.
CAUTION:
High voltages may be present on a faulty set and care should be taken to avoid electric
shocks.
Certain components within this set are specific safety items and must be replaced with similar
items which comply to the same safety specification.
All such parts may be obtained direct from AMSTRAD CONSUMER ELECRONICS PLC

ALIGNMENT INSTRUCTIONS
Equipment required: VTVM; AM/FM Band SSG; Loop Antenna; AM/FM IF Genoscope; Non Metalic Trimming Tool;
Dummy Load — 470K; Oscilloscope.
AM Alignment
Step FUNCTION SIGNAL IN SIGNAL OUT METHOD REMARKS
1. AM IF Alignment at Inject signal at TP1 from AM IF Connect G’scope at TP4. Adjust IFT 103 and IFT 104 to get 1. Ensure set switched to MW band. -
468KHz. SG. Select 468KHz AS IF. max signal output on ‘scope. 2. Vol control max. Tone controlat centre.
3. Sig. input optimumto avoid AGC action.
REPEAT STEP 1 UNTIL NO FURTHER IMPROVEMENT IS OBSERVED.
Connect loop antenna to the Connect VTVM and O’scope | Adjust T101 to obtain max sig. output
ferrite rod. Inject signal from across speaker output via on the meter and ‘scope.
AM SSG at 525KHz. 470K dummy load.
Connect loop ant. to the ferrite Connect VTVM and O’scope
rod. [nject sig from AM SSG at across speaker output via
1650KHz. 470K dummy load.
REPEAT STEPS 3 & 4 UNTIL NO FURTHER IMPROVEMENT OBTAINED
Connect loop ant. to the ferrite Connect VTVM and O'scope___—i[ Adjust L104 to obtain max sig. output
rod to inject sig from AM SSG at | across speaker output via on the meter and scope.
470K dummy load.
Connect VTVM and O'’scope__| Adjust TC 103 to obtain max sig
output on the meter & scope.
600KHz.
Connect loop ant. on the ferrite
rod to inject sig from AM SSG at | across speaker output via
1400KHz. 470K dummy load.
REPEAT STEPS 6 & 7 UNTIL NO FURTHER IMPROVEMENT
Connect VTVM and O’scope__'| Adjust T102 and L104 to obtain max
across speaker output via sig output on the meter and scope.
470K dummy load.
MW Osc. Alignment at
1650KHz.
MW aerial alignment at
600KHz.
7. MW aerial alignment at
1400KHz.
1. Ensure set tuned to 525KHz.
2. Vol control max. Tone control at centfe.
3. Sig. input optimumto avoid AGC action.
1. Ensure set tuned to 1650KHz.
2. Vol control max. Tone control at centre.
3. Sig. input optimumto avoid AGC action.
MW Osc. Alignment at
525KHz.
Adjust TC 105 to obtain max sig
output on the metez.
1. Ensure set tuned to 6O0KHz.
2. Vol control max. Tone control at centre.
3. Sig. input optimumto avoid AGC action.
1. Ensure set tuned to 1400KHz.
2. Vol control max. Tone control at centre.
3. Sig. input optimumto avoid AGC action.
1. Ensure set switched to LW.
2. Set tuned to 14QKHz
3. Vol contro! max. Tone control at centre.
4. Sig. input optimumto avoid AGC action.
1. Ensure set switched to LW.
2. Vol control max. Tone control at centre.
3. Sig. input optimumto avoid AGC action.
MW & LW alignment now complete.
Ensure all the coils and transformers
are sealed.
1. Ensure set switched to FM.
2. Ensure stereo/mono sw switched
to mono.
3. Sig. input optimumto avoid AGC action.
1. Ensure set switched to FM.
2. Ensure stereo/mono sw switched
to mono.
3. Sig. input optimumto avoid AGC action.
Connect loop ant to ferrite rod.
Inject 140KHz from AM SSG.
LW Osc and aerial
alignment at 140KHz.
Connect loop anit to ferrite rod. Connect VIVM and O'scope {Adjust TC 106 and TC 104 to obtain
Inject 280KHz from AM SSG. across speaker output via max sig output on the meter and
470K dummy load. scope.
REPEAT STEPS 9 & 10 UNTIL NO FURTHER IMPROVEMENT
LW Osc alignment at
280KHz.
FM ALIGNMENT
FM IF alignment at
10.7 MHz.
Adjust T101 to obtain max output on
the scope with a symmetrical ‘S’
curve centered at 10.7MHz.
Connect O’scope to TP5.
Inject 10.7MHz signal from
FM IF SSG at TP2.
Adjust T102 to obtain symmetrical
‘S’ curve.
Inject 10.7MHz signa! from Connect O’scope to TPS.
FM IF SSG at TP2.
FM IF alignment at
10.7MHz.
REPEAT STEPS 1 & 2 UNTIL NO FURTHER IMPROVEMENT
Inject 86.5MHz signal from Connect scope & VTVM Adjust L103 to obtain max output on
FM IF SSG at J101. across dummy load. the meter.
1. Ensure set tuned to 86.5MHz.
2. Ensure stereo/mono sw switched
to mono.
3. Sig. input optimum to avoid AGC action.
1. Ensure set tuned to 109.5MHz.
2. Ensure stereo/mono sw switched
to mono.
3. Sig. input optimum to avoid AGC action.
FM Osc alignment at
86.5MHz.
Adjust TC2 to obtain max output on
the meter.
Connect scope & VTVM
across dummy load.
FM Osc alignment at
109.5MHz.
FM Osc tracking at
90MHz.
FM Osc tracking at ‘Inject 106MHz signal from Connect scope & VIVM
106MHz. FM IF SSG at J101. across dummy load.
Inject 109.5MHz signal from
FM IF SSG at J101.
REPEAT STEPS 4 & 5 UNTIL NO FURTHER IMPROVEMENT
Inject SOMHz signal from Connect scope & VTVM Adjust L102 to obtain max output on
FM IF SSG at J101. across dummy load. the meter.
Ensure set tuned to 930MHz, vol max,
tone control to centre sig input
optimum to avoid AGC action.
Ensure set tuned to 106MHz, vol max,
tone control to centre sig input
optimum to avoid AGC action.
REPEAT STEPS 7 & 8 UNTIL NO FURTHER IMPROVEMENT We aD
Set tuned to a strong stereo Monitor stereo beacon. Adjust VR201 to get the st. 1. Ensure set switched to FM.
station. beacon on. 2. Ensure stereo/mono sw to stereo. ©
Adjust TC1 to obtain max output on
the meter.
FM MXP adjustment.
FM alignment now complete.

2]
<
3
ONODARWODN —
Description
Dust Cover
B8308
BSR P267 Turntable | S/83007
Hinge Cover
Cabinet
Castor Receptacle
Castor
Screw Cover
Magnet
Glass Door
Handle Pack
Handle
Hinge Grommet
Hinge Screw
Hinge Top
Hinge Pack
Hinge Bottom
Cartridge BSR
or
Cartridge TETRAD
Stylus BSR
Stylus TETRAD
B9109
B3041
B9003A
B9003B
B1043
B9005
B8310
BS006A
B9006B
B9110A
B9110B
B9110
B9110C
B9111
83002A
83007A
83002B
83007B
CABINET DRAWING
& PARTS LIST |
Le
A)
INIMUM _
v
FREQUENCY
DIAL CORD STRINGING
ARGE 16/2 TURNS
MALL: RN
cé
Kos
°Y
START: Y4 TURNS

| No.
OONOOaRND —
Description
Motor Assy
R.W. Idler Arm Assy
Idier Arm Assy
Belt Main
Flywheel
Leaf Switch
Record Safety Lever
Take Up Spool Assy
Rewind Spool Assy
Pinch Roller Spring
Pinch Roller
Head Erase
Head R.P.B.
CASSETTE MECHANISM
Part No. Description
809151
809152
809154 Idier Spring
809155 Idler F.F./R.W.
809156 Flywheel Holder
809157 Pause Lock Lever
80S158 Spring Locking Plate
809159 Head Base
809160 Auto Stop Arm Assy
809161 Stopper, Locking Plate
809162 F.F. Gear
700017 Locking Plate
Poly Washer
700016
809165
809166
809167
809168
809169
809170
809171
809172
809173
809174
809175

CASSETTE ALIGNMENT INSTRUCTIONS
Equipment required: Double Beam Oscilloscope; Frequency Counter; RMS Meter;
Non-Metallic Trimming Tool; 6.8KHz Test Tape; 1kHz Test Tape.
FUNCTION SIGNAL IN SIGNAL OUT METHOD REMARKS
1 Bias frequency Switch SW 301 to record. Monitor ‘scope or freq. Adjust L303 to give 625KHz. Ensure the AFC switch is off.
adjustment. counter from junction
C328, C331.
2 Bias trap adjustment. Switch SW 301 to record. RMS Meter across Adjust L301/302 to get the same Voltage should not change if the
R301/302 in turn. voltage at R301 & R302. AFC sw is on or off.
3 Bias level adjustment. Switch SW 301 to record. RMS Meter across Adjust VR 301/VR 302 to Ensure AFC switchis off.
R301/302 in turn. show 4.5mvV.
4 Head azimuth 6.8KHz Test tape. Double beam ’scope at Ensure set switched to tape.
adjustment. speaker sockets.
5 Tape speed adjustment. 1KHz Test tape. Frequency counter at Ensure set switched to tape.
speaker socket.
Adjust azimuth screw for max
amplitude on both channels
ensuring both signals in phase.
Adjust motor with non-metallic
trimming tool for correct frequency.
CASSETTE DECK MECHANISM - GENERAL MAINTENANCE
Before attempting any specific fault-finding on the cassette mechanisms, it is recommended that the
following checks and maintenance procedures be carried out.
1. R/P HEAD (Symbol 14)
Thoroughly clean the head and examine for signs of wear; replace if worn; de-magnetise.
2. PINCH-ROLLER ASSEMBLY (Symbol! 12)
Thoroughly clean, check general condition. if rubber roller is in any way distorted, replace the
assembly.
Check the tension of the Pinch-Roller Spring, the tension should be 40 to 60gm.
3. MAIN BELT (Symbol 5)
Ensure the belt is correctly located. Check that it is not stretched or worn and replace if necessary. In
any event, remove the belt and clean with methylated spirits.
4. TAKE-UP SPOOL ASSEMBLY (Symbol 9)
Check the tension of this using a cassette torque meter. The correct reading should be 40gm per cm.
A reading of between 30 and 50gm per cm may be regarded as within tolerance.
Should the reading fall below 30gm per cm, it must be adjusted to give the correct torque.
lf it cannot be adjusted it should then be replaced.
5. REWIND IDLER ASSEMBLY (Symbol! 2)
Check the tension with the cassette torque meter using the rewind function.
The torque should be 100gm per cm but a reading of between 80 and 110gm per cm may be
considered within tolerance.
If the torque falls below 80gm per cm, it should be adjusted to give the correct reading.
If it will not adjust sufficiently, it should be replaced.
6. MOTOR (Symbol! 1)
Ensure that the motor is securely mounted and that the motor rubbers are in good condition.
7. FLY-WHEEL (Symbol 6)
Check that the Fly-wheel spindle is not worn or bent and that it is securely seated in its bearing.
8. INTERNAL MECHANISM
After prolonged use, the internal mechanism will normally contain substantial deposits of oxide dust.
Ensure that these are thoroughly cleaned.
There are no places on either mechanism which require any oil or grease and the application of any such
lubrication is likely to seriously harm the internal workings of the mechanism.

10
Item
A102110
A117441
A117382
A106210
A114446
A114621
A104189
B117437
A114759
A102166
A106089
A106510
A102126
A102616
A116570
B116574
A106513
A102718
A114784
A114759
A106089
A106206
A106510
A117393
A106749
A111516
A104865
A105267
BSR P267 RECORD DECK AND PARTS LIST
| PartNo. | Description
Circlip
Turntable Assembly
Motor Mounting Screw (3 off)
Grommet (3 off}
Drive Belt
Thrust Washer
Transit Screw
Mainplate Welding & Riveting Assembly
Unit Mounting Spring
Retaining Ctip
Spring Cup
Screw type B No.6 x 6.5 Rec. Pan Hd. (2 off)
Solder Tag (2 off)
Phono Socket
Drive Sleeve
D.C. Motor Requirements
76mm of 05 P.V.C. Sleeving
Cable Clamp
Screw type B.T.6-20 x 8 Rec. Pan Hd.
Unit Mounting Spring (2 off)
Spring Cup (2 off)
Tag Mounting Strip
Screw type B No.6 x 6.5 Rec. Pan Hd.
P.U. Hinge Retainer
4B.A. Tag Lockwasher
Molex Plug
Insulating Strip
Screw type B.T.4-24 x 8 Rec. Pan Hd. (2 off}
A300126
A106512
A102166
A116564
A106089
A114759
A106512
B117369
A325010
A117464
A104189
A116565
A117461
A117376
A114155
A117378
B117375
B116562
A117439
A103373
117420
A105237
A105142
A103373
D117379
A117483
A117368
Description
On/Off Speed Control Board (B40)
Screw type B.T.4-24 x 16 Rec. Pan Hd.
Retaining Clip
Detent Spring
Spring Cup
Spring (Unit Mounting)
Screw type B.T.4-24 x 16 Rec. Pan Hd.
L.E.D. Mounting Clip
L.E.D. Requirements
Escutcheon Printing
Transit Screw
Knob Spindle
Controt Escutcheon Printing
Pick-Up Rest
Cue Knob
Raising Arm
Raising Pad
Knob
P.U. Lead Assembly
Securing Rubber (2 off)
Pick-Up Hinge
P.U. Balance Spring
Spring Anchor
Securing Rubber
Pick-Up Arm
Screw type ‘Plastite’ 4-20 x 6.5 Rec. Pan Hd. (Black)
Pivot Pin