Panasonic SAAK66 - MINI HES W/CD PLAYER User manual

ORDER NO. MD0102038C1
Service Manual
COMPACT
DIGITAL AUDIO
i
Remote
Control
Transmitter
S8-AKGG
Specifications
@ AMPLIFIER SECTION
Power output
THD 10% Total harmonic distortion
(Front 1 kHz)
(Center 1 kHz)
(Surround 1 kHz)
Total output in stereo mode
Total output in Dolby Pro Logic
mode
FTC Power output
THD 10% Total harmonic distortion
(Front 70-16 KHz)
(Center 70-16 kHz)
(Surround 70-16 kHz)
Total output in stereo mode
Total output in Dolby Pro Logic
mode
Input sensitivity
AUX
Input Impedance
AUX
@ FM TUNER SECTION
Frequency range
Sensitivity
SA-AKE6 SB-AKSS6
70 W per channel (6 Q)
70 W per channel (8 Q)
35 W per channel (8 Q)
140 W
280 W
60 W per channel (6 Q)
70 W per channel (8 Q)
35 W per channel (8 Q)
120 W
260 W
250 mV
13 kQ
87.9 - 107.9 MHz (200 kHz steps)
87.5 - 108.0 MHz (100 kHz steps)
2.5 pV (IHF)
Panasonic
CD Stereo System
SA-AK66
Colour
(S)... Silver Type
Area
(P)... U.S.A.
(PC)... Canada
TAPE SECTION :
SG-2W MECHANISM SERIES
CD SECTION :
RAE0152Z-3 TRAVERSE DECK SERIES
S/N 26 dB
Antenna terminal(s)
@ AM TUNER SECTION
Frequency range
Sensitivity
S/N 20 dB (at 1000 kHz)
@ CASSETTE DECK SECTION
Track system
2.2 UV
75 Q (unbalanced)
520 - 1710 kHz (10 kHz steps)
560 pV/m
4 track, 2 channel
Heads
Record/playback Solid permalloy head
Erasure Double gap ferrite head
Motor DC servo motor
AC bias 100 kHz
AC erase 100 kHz
Recording system
Erasing system
Tape speed 4.8 cm/s
Frequency response (+3 dB, -6 dB at DECK OUT)
NORMAL (TYPE 1) 35 Hz - 14 kHz
S/N
Wow and flutter
50 dB (A weighted)
0.18 % (WRMS)
Fast forward and rewind time Approx. 120 seconds with
C-60 cassette tape
m@ CD SECTION
Sampling frequency 44.1 kHz
Decoding 16 bit linear
© 2001 Matsushita Electronics (S) Pte. Ltd. All rights
reserved. Unauthorized copying and distribution is a
violation of law.

SA-AK66
Beam source/wave length Semiconductor laser/780 nm
Stereo
20 Hz - 20 kHz (+1, -2 dB)
Wow and flutter Below measurable limit
Digital filter 8 fs
MASH (1 bit DAC)
Number of channels
Frequency response
D/A converter
m@ GENERAL
Power supply AC 120 V, 60Hz
Power consumption 230 W
Power consumption in standby mode
0.29 W
250 X 332 X 319 mm
9 27/32” x 13 1/16” x 12 9/16”
(8.3 kg) 18.3 Ib
Dimensions (W x H x D)
Mass
m@ SYSTEM
SC-AK66(P) Music Center: SA-AK66(P)
Front Speaker: SB-AK66(P)
Center & Surround Speaker: SB-PT70A (P)
Music Center: SA-AK66(PC)
Front Speaker: SB-AK66(P)
Center & Surround Speaker: SB-PT70A (P)
SC-AK66(PC)
Notes:
1. Specifications are subject to change without notice. Mass and
dimensions are aproximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
A, WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
CONTENTS
Page
F Safety Precautlont-s-nsesrceesecenne scree cece cee ese ens 2
2 Before Repair and Adjustment -----------------------------------77222 2227 3
3 Protection Circuitry --------------------------rrrrrrrrrernnnnn nnn 3
. PCCOS SONI So neene ttc ne ese a eens ce apes agree ps toe asecaencena en cnents 4
5 Handling Precautions For Traverse Deck ------------------*+---------"" 5
6 Precaution of Laser Diode ---------------------++2222-eeeeeeenennteeeeeeeeenees 6
7 Operation Procedures --------------------------neesenneernrrnreren nnn nesses nennes 7
8 Operation Checks and Main Component Replacement
Se, ea ae ec ei ieee ab eae 9
9 Self-Diagnostic Function -------------------------renrnennnseee nce eeenneceenees 17
10 Description of Error Code -------------------------22-enreccnsecc ecco neccenees 18
1 Safety Precaution
(This “Safety Precaution” is applied only in U.S.A.)
Page
11 CD Test Mode Function ------------------------------2--nnnenrrcnon nn nrccnnn es 19
12 Measurements and Adjustments ~----------------------------------------- 20
13 Illustration of IC #i, Transistors and Diodes ------------------------- 22
14 Terminal Function off IC iii -----------r--reerreeceeenettceeteen tren ttceetene 23
15 BlOCK: Disgralin sssce-s econ se csencsnsecsce sceketirsensetemn ses seurteoneosrauedesosess 26
16 Schematic Diagram --------------------------2222reeereeereoeeeeenenennnttttttnnes 33
17 Printed Circuit Board --------------------------nnrnernn nn rernrnn errr cnrrcnnn es 46
18 Wiring Connection Diagram ----------------------------r-rrnnrr renner 57
19 Troubleshooting Guide ---------------------------------r--onnrrnnnnnnrrcnnnn es 58
20 Parts Location and Replacement Parts List ------------------------- 59
1. Before servicing, unplug the power cord to prevent an electric shock.
2.When replacing parts, use only manufacturer’s recommended components for safety.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to
prevent the customer from being exposed to a shock hazard.

1.1. Insulation Resistance Test
1. Unplug the power cord and short the two prongs of the plug with a jumper wire.
2. Turn on the power switch.
3. Measure the resistance value with ohmmeter between the jumper AC plug and each exposed metal cabinet part, such as
screwheads, antenna, control shafts, handle brackets, etc.
Equipment with antenna terminals should read between 3 MQ and 5.2 MQ to all exposed parts*.(Fig.1)
Equipment without antenna terminals should read approximately infinity to all exposed parts.(Fig.2)
*Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.
4. lf the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be repaired
and rechecked before it is returned to the customer.
Antenna
terminal
metal metal
Ohmmeter ‘ Ohmmeter
Fig. 2
Resistance = Approx co
Resistance = 3MQ —5.2MQ
2 Before Repair and Adjustment
Disconnect AC power, discharge Power Supply Capacitors C571~C574, C579 through a 10Q, 5W resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 120V, 60 Hz in NO SIGNAL mode should be ~600mA.
3 Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
+ No sound is heard when the power is turned on.
«Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note :
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

Accessories
Remote Control
Transmitter
AM Loop antenna

5 Handling Precautions For Traverse Deck
The laser diode in the traverse deck (optical pickup) may break down due to potential difference caused by static electricity of
clothes or human body.
So, be careful of electrostatic breakdown during repair of the traverse deck (optical pickup).
- Handling of traverse deck (optical pickup)
1.Do not subject the traverse deck (optical pickup) to static electricity as it is extremely sensitive to electrical shock.
2.The short land between the No.4(LD) and No.5(GND) pins on the flexible board (FFC) is shorted with a solder build-up to
prevent damage to the laser diode.To connect to the PC board, be sure to open by removing the solder build-up, and finish the
work quickly.
3. Take care not to apply excessive stress to the flexible board (FFC).
4.Do not turn the variable resistor (laser power adjustment). It has already been adjusted.
Flexible board. Lens
FFC
(Do
not
touch)
(Handle it carefully)
; ; Variable resistor
No.)
Pin
(GND)
No.@)
Pin
(LD)
(Do
not
tum)
- Grounding for electrostatic breakdown prevention
1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity from your body.
2. Work table grounding
Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pickup) is placed, and ground
the sheet.
Caution :
The static electricity of your clothes will not be grounded through the wrist strap. So, take care not to let your clothes touch the
traverse deck (optical pickup).
Caution when Replacing the Traverse Deck :
The traverse deck has a short point shorted with solder to protect the laer diode against electroststics breakdown. Be sure to
remove the solder from the short point before making connections.
Wrist strap
(Anti-static bracelet)
lron plate or some metals
to conduct electricity

6 Precaution of Laser Diode
CAUTION:
This unit utilizes a class 1 laser.
Invisible laser radiation is emitted from the optical pickup lens.
When the unit is turned on:
1.Do not look directly into the pick up lens.
2.Do not use optical instruments to look at the pick up lens.
3. Do not adjust the preset variable resistor on the pickup lens.
4.Do not disassemble the optical pick up unit.
5. If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.
6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation
exposure.
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.

7 Operation Procedures
ia Main unit
No. Name
@) AC supply indicator (AC IN)
This indicator lights when the unit is connected to the AC power
supply,
> Standby/on switch (©/, POWER)
Press to switch the unit from on to standby mode or vice versa.
In standby mode, the unit is still consuming a small ammount of
power.
@ Play timerfrecord timer button
(@PLAY/@REC)
@) Clocktimer button (CLOCK/TIMER)
® Deck 1 open button (4 DECK 1 OPEN)
©) Deck 1 cassette holder
@® Disc tray
@) DOLBY PRO LOGIC on/off button (00 PL)
@ 6-channel input button (6CH INPUT)
4® Surround on/off button (SURROUND)
i) Deck 2 open button (& DECK 2 OPEN)
42 Deck 2 cassette holder
43 CD open/close button (4 OPEN/CLOSE)
4@ Headphone jack (PHONES)
Ey Center console
48 Remote control signal sensor
G8 AUX button (AUX)
4% Tunerfband select button (TUNER, BAND)
4 Tapefdeck select button (TAPE, DECK 1/2)
4% CD button (CD)
0 Display
@? Disc direct play buttons and indicators
{CD 1 ~ CD §)
@@ CD manager button
(CD MANAGER)
@ Display select/demonstration button
(-DISPLAY/~DEMO}
25 Tape edit button (TAPE EDIT)
@ Basic operating buttons
Functions change according to the source.
@8 Super sound EQ button (SUPER SOUND EQ)
@ Jog control (SOUND EQ)
@ Volume control (VOL)
8 Recording start/stop button (@ REC/STOP)

Remote control
Buttons such as @ functions in exactly the same way as the buttons
on the main unit.
z 2
SSOSSSOSSOSSSOOSSSOSeSESO
Name
Standby/on button (©)
Auto off button (AUTO OFF)
Numeric buttons (210, 1-9, 0)
Program button (PROGRAM)
Cancel button (CANCEL)
AUX button (AUX)
Tuner/band select button (TUNER)
EQ select button (EQ)
DOLBY PRO LOGIC on/off button (00 PL)
Pause/preset channel select button (W/V)
Test signal output button (TEST)
Channel select button (CH SELECT)
Volume buttons (~ VOLUME +)
Sleep button (SLEEP)
Muting button (MUTING)
Dise button (DISC)
Random button (RANDOM)
Repeat button (REPEAT)
CD button (CD)
Fape/deck select button (TAPE)
Skip/search buttons (</<6<, > b> > P])
Play/preset channel select button (/A)
Stop/program clear button (M/CLEAR)
Channel level select buttons
{(~ CH LEVEL +)

8 Operation Checks and Main Component Replacement
Procedures
Gear for servicing (jig) information
1. This unit has a gear which is used for checking items (Open/close of disc tray, up/down operation of traverse unit by manually)
when servicing.
2. For preparation of gear (for servicing}, Perform the procedures as follows.
3. In case of re-servicing the same set, the "gear for servicing” may has been taken off because it has been used.
The "gear for servicing” musi be stored,
1. Remove the gear provided with mechanism cover 2. Insert the hexagonal screwdriver (2mm) into the gear,
as shown below. and then project the tip of screwdriver for 1~2mm in length.
Cut these portions to
take the gear off.
Gear
Hexagonal
screwdriver
[Part
No.
:
$2ZP1101C]
Mechanism cover
1~2mm
“ATTENTION SERVICER”
Some chassis components may have sharp edges.
Be careful when disassembling and servicing.
1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the
main components.
2. For reassembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
3. Select items from the following index when checks or replacement are required.
Contents
- Checking Procedure For Each Major P.C.B.
1. Checking of the Main, Panel, Deck and Power P.C.B.
- Main Component Replacement Procedures
1. Replacement of the Traverse Deck.
2. Replacement of the Power Amplifier IC.
- Disassembly and assembly of the Traverse Unit
- Disassembly and assembly of the Disc Tray
Warning:
This product uses a laser diode. Refer to caution statement Precaution of Laser Diode.

8.1. Checking Procedure For Each Major P.C.B.
8.1.1. Checking of the Main, Transformer, Panel and Deck P.C.B.
Step 1 Step 4
@x3
Qx2
‘ee ™ &, i
eS Step i
© x 5 ®« 3
Step 1
Step
2
Remove
the
top
cabinet.
+(c\)
Step 3 Remove the T-bracket.
Ralnasa ware conhacled Step 5 Turn locating pin on both sides 90°. (Locating pin need
H500/WS5S00 and CN5S01 not to be bent back.)
Step 6 Release the wires CN302, CN303, CN304, CN309 and
CN502. Remove rear panel by pulling it backward and lift the
rear panel assembly.
10

We
Step 9 Remove the CD lid in the direction of the arrow.
Step
10
(hmas
7X
2
Hexagonal
wrench
Step 7 Use a hexagonal wrench and turn clockwise to release
the tray.
Qa
Step 8 Pull the CD tray in the direction shown above.
Catches
Step 11 Release the two catches shown above to remove the
front cabinet from the CD traverse unit.
11

SA-AK66
CN303 Step 12 Connect back the wire to CN302, CN303 and CN304.
Use the extension wire (REXX0261) to connect to CN502. Use
a FFC wire (REEX0137) to connect CN1 to CN309.
Extension sable REXX0261 CN302
Meo ee: Panel P.C.B.
Transformer P.C.B./ |
/ CN309
FFC wire REEX0137
CN304
| Deck P.C.B.
CN
8.2. Main Component Replacement Procedures
1. Replacement of the Traverse Deck Servo PC.B
Step 1 Follow the procedures in ‘Disassembly of the Traverse Traverse Deck
Unit’ ( Step 1 - Step 4 ) |
Flexible cable
f,
2
Flexible cable
Step 3 Desolder the 4 legs of the 2 motors and pull out the Step 5 Remove the flexible cable CN 701.
Servo P.C.B.
Step 4 Widen the 3b ith a fl dri rT - Removal of the flexible cable. Push the top of the connector
rep : er MIG: 2 Dosses WIN enlisk core Wenver ane BulOur in the direction of the arrow 1, and then pull out the flexible
the 3 pins. Then remove the Traverse Deck. Sable in thesditectlon oF ho=nrowe:
Note:
Insert a short pin into the flexible cable for traverse unit.
12

- Installation of the CD servo P.C.B. after replacement Step 2 Remove the wires at CN302, CN303 and CN304 and
pull out the Main P.C.B.
Step 1 Connect the FFC board.
Step 3 Remove 4 screws fixed to the Power Amplifier IC.
Step 2 Install the CD servo P.C.B. in the traverse deck
assembly. Power Anip IC
C501
Step
3
{RSNS09VV44)
Ox
3F
|
Reset detect |
switch 4
iyi OLE PES
ile, = Be
Solder Step 4 Unsolder the terminals of Power Amp IC and replace
the respective component.
Note:
Before installing the CD servo P.C.B., move the optical pickup
towards the outer edge from the marking (black triangle).
[Otherwise, the reset detect switch (S701) mounted on the CD
servo P.C.B. may be damaged.]
Optical Marking “<q”
pickup
* Rotate the gear to move
the side A of optical pickup
toward the outer edge from
the marking “<q”.
2. Replacement of the Power Amplifier IC
Step 1 Follow the procedures in ‘Checking Procedure for each Power PCB
major
P.C.B.’
(
Step
1
-
Step
4
).
rower
r.\.B,
Heat sink
Step 3
€ x2
Power P.C.B.
13

8.3. Disassembly and assembly of the Traverse Unit
Step 1 Push the lever from position A to B.
Step 2 Pull the stopper (black) in the direction of arrow 1 and
push the lever in the direction of arrow 2.
Step 3 Push the stpeer (black) down until the white lever eject
out.
White fever ,
Step 3 Pull the stopper in the direction of arrow 1 and release
the lever in the direction of arrow 2 as shown.
Step 4 Pull out the tray half way and push it back fully.
Stopper
Step 4 Lift up the traverse unit and slide out the unit as shown.
it
- Replacement of Traverse Unit Step 5 Push the lever to the initial position indicated ‘I---I’.
Step 1 Place the traverse unit as shown.
Step 2 Press in the lever shaft in the direction of arrow 1 as
shown and push the traverse unit into the position in the
direction of arrow 2.
14

8.4. Disassembly and assembly of the Disc Tray
Hexagonal wrench
Disc tray
Step 5 Rotate the hexagonal wrench in the direction of arrow
(clockwise), and then open the disc tray fully.
Clamp SW P.C.B.
Step 2 With lifting the claw in the direction of arrow 1, draw the
clamp SW P.C.B. in the direction of arrow 2.
Step 3 Remove the mechanism cover.
Hexagonal
Pe wrench
Disc tray
Claw
Step 6 Upset the CD changer unit again.
Step 7 Release both the claws, and then draw the disc tray.
Step 4 Insert the gear with hexagonal wrench into the hole.
15

SA-AK66
Step 3. Drive rack
Drive gear
Force the right guide bar of tray base
Disc tray manually not to move upwards.
Step 8 With forcing the left guide bar manually because the left Step 3 Align the drive rack with the driver gear.
guide bar interfers with claw, draw the disc tray.
:- Installation of the disc tray after replacement
Disc tray
Disc tray
Pulley gear
Step 1 Slide the drive rack fully in the direction of arrow.
Step 4 Holding the disc tray manually, rotate the pulley gear in
the direction of arrow.
Step 5 Rotate the gear 5 or 6 times manually, and then push
the disc tray.
Drive rack
Disc tray
Step 2
Step 2 Holding the drive rack not to move, install the disc tray.
16

9 Self-Diagnostic Function
9.1. Self-diagnostic display
This unit is equipped with a self-diagnostic display function which, if problems occur, they shall be memorised as errors and there
shall be no error display at the time of such occurrence. Error displays shall only be displayed in the self-diagnostic mode. See
“How to enter Self Diagnostic Function”.
Use this function when performing maintenance on the unit.
9.2. How to enter the Self-Diagnostic Function
Turn the unit on with no cassette in
the deck. (SELECTOR : TAPE)
cog Prass and hold "i TUNE MODE"
ee ee f button for at least 2 seconds.
eee
were one
£7 while pressing the "im TUNE MODE"|
button , press “p»/ppi MEMORY® |
button for at least 2 seconds.
WEMORY Diep
Display... ,
"TF" will appear on the FL. display.
(unit is in the Self-Diagnostic function.
Press “STOP/TUNE MODE ” to indicate error code.
- If several problem exist, error code will change each time when “STOP/TUNE MODE ” is pressed.
9.3. Cassette Mechanism Test (For error code H01, H02, H03, F01, FO2)
1.Press “TAPE, DECK 1/2” to select Deck 2.
2.Load a normal cassette tape with the erasure prevention tab, remove from left side only and close the cassette holder.
3. Press “FAST FORWARD MEMORY?” (Tape will not move).
4.Load a normalm, Cr02, metal cassette tape with the erasure prevention tab, remove from right side only and close the cassette
holder.
5.Press “REVERSE FM MODE/BP” (Tape will be stop after 2 seconds)
6.Load a pre-recorded tape with both side record tabs intact and close the cassette holder.
7.Press “PLAY/TUNE/TIME ADJ UP” (After TPS function, tape will stop automatically)
8.Press “REC/STOP” (Tape will not move)
9.Press “STOP/TUNE MODE?” to indicate Error code.
- If several problem exist, error code will change each time when “i /TUNE MODE?” is pressed.
(e.g. HO1 — H03 — FO01 ..... etc.)
17

10. Press “TAPE, DECK 1/2” to select Deck 1.
11. Repeat step 2 to 9 to test Deck 1. (Tape Deck 1 will not check H02 because of no recording function)
9.4. Toclear all Error code
1.Press “STOP/TUNE MODE?” button for 5 seconds.
2.FL indicator shows “CLEAR” for 1 second and change to “T”.
9.5. How to get out from Self-Diagnostic function
1.Press “Power” button OFF.
9.6. Power Amplifier Failure (F61)
1.When power amplifier fail, F61 will indicate automatically.
10 Description of Error Code
10.1. Error detection for Cassette Mechanism block
Nl A 6-9 ini
Display
Faulty operation of cassette mechanism.
detection error Faulty contact or short-circuit of mechanism mode switch (S951, S971).
detection error Faulty contact or short-circuit of REC INH switch (S974, S975).
detection error Faulty contact or short-circuit of HALF siwtch (S952, S972).
Reel Pulse ee ee tape advances slightly and then stops.
detection error Faulty reel pulse, faulty hole detect IC (IC951, IC971).
i a
Faulty playback EQ/recording amplifier IC (1C101).
10.2. Error detection for CD/Changer block
Error Problem condition
Display
REST SW detection error F15 CD does not function.
This error occurs when the Optical Pick Up REST SW (S701) is not
detected within the specified time (about 8 seconds)
CD tray opens automatically CLAMP switch ($4) NG (Check & Replace)
1
3 Does not startup when [PLAY] F17 BOTTOM switch (S5) NG (Check & Replace)
button is pressed
4 Transmission error between CD F26 CD does not function.
servo LSI and micon This error occurs when the POWER is ON for the CD block and an error
is
detected after the transmission has started.
Startup fails even when you Tray 1 detect switch or Tray 2 detect switch NG (Check & Replace)
insert CD or the selected disc tray
does not open
F27
Cannot insert CD Tray 1 detect switch NG (Check & Replace
ri Cannot eject CD Check if disc is stuck. Tray 2 detect switch NG (Confirm & Replace)
| 8 |The CD tray closes CD disc tray detect switch NG (S3) (Check & Replace)
10.3. Power Supply related error detection
Error Error Problem condition
Display
1 POWER AMP F61 When POWER is switched on, power become off automatically.
output abnormal During normal operation, if DC DET become L, PCNT shall become
L and the error display on the left shall be displayed. (IC501)
18

11 CD Test Mode Function
This CD test mode is provided to check CD unit without connecting to changer loading mechanism. This mode shall operate CD
PLAY with CD unit being connected only and CD Automatic Alignment result is shown on FL display.
11.1. How to set CD test mode
2,
Ld) Press CD.
<u, Press and hold “ml TUNE MODE" |
Se ee button for at least 2 seconds.
|\___vdloe While pressing the "ll TUNE MODE"
_ button, press ">>/erm1 MEMORY"
button for at least 2 seconds.
Display
, "CD TEST’ will appear on the FL display. |
CD TEST | (unit is in the CD test mode.
11.2. CD Automatically Adjustment result indication
Under CD test mode, pressing the numeric key ‘0’ on the remote controller will display the auto adjustment result. FLOCK, TLOCK
and CLVS status shall be shown as below:
[... OO#OO _ | ]........FL shall display as left if the Result is OK
wu SEH Adjustment result
CLVS (1 = OK, 0= NG}
TLOCK (1 = NG, 0 = OK)
- FLOCK (1 = NG, 0 = OK)
During the above display, executing CD PLAY will display auto adjustment result for CD PLAY mode.
19

SA-AK66
12 Measurements and Adjustments
12.1. Cassette Deck Section
+ Measurement Condition
— Tape edit: NORMAL
— Record timer: OFF
— Make sure head, capstan and press roller are clean.
— Judgeable room temperature 20 + 5 °C (68 + 9°F)
+ Measuring instrument
— EVM (Electronic Volmeter)
— Digital quency counter
- Test Tape
— Head azimuth adjustment (8 kHz, -20 dB); QZZCFM
- Tape speed gain adjustment (3 kHz, -10 dB);
QZZCWAT
— Playback gain adjustment (315 Hz, 0 dB); QZZCFM
— CrO2 tape, QZZCRX
12.1.1. Tape Speed Adjustment (Deck 1/2)
1. Set the tape edit button to “NORMAL” position.
2. Insert the test tape (QZZCWAT) to DECK 2 and playback
(FWD side) the middle portion of it.
3. Adjust Motor VR (DECK 2) for the output value shown
below.
Adjustment target: 2940 ~ 3060 Hz (NORMAL speed)
4. After alignment, assure that the output frequency of the
DECK 1 FWD is within +60 Hz of the value of the output
frequency of DECK 2 FWD.
UNIT
Digital frequency
counter
12.2. Tuner Section
12.2.1. AM-IF Alignment
- AM-IF ALIGNMENT
12.1.2. Bias and Erase Voltage Check
1. Set the unit “AUX” position.
2.Insert the Normal blank tape (QZZCRA) into DECK 2 and
the unit to “REC” mode (use “@® REC/STOP” key).
3.Measure and make sure that the output is within the
standard value.
4. Insert the CrO2 tape (QZZCRX).
5. Repeat step 2 and 3.
Bias voltage for Deck 2
Erase voltage for Deck 2
19 + 4mV (Normal)
more than 100mV (Normal)
Bias Erase
1MQ
TP5 O+ UNIT
1KQ
TP4 =
(GND)
12.1.3. Bias Frequency Adjustment (Deck
1/2)
1. Set the unit to “AUX” position.
2. Insert the Normal blank tape (QZZCRA) into DECK 2 and
set the unit to “REC” mode (@ use “REC/STOP” key).
3. Adjust L1002 so that the output frequency is within the
standard value.
Standard Value: 98 +8 kHz
UNIT
TP12 ¢ TP11 = :
Digital frequency
counter
INDICATOR
(ELECTRONIC
VOLTMETER
OSCILLOSCOPE)
Headphone Jack (32Q)
Fabricate the plug as
shown in Fig. 2 and then
connect the lead wires of
the plug to the
measuring instrument.
ADJUSTMENT(Shown in REMARKS
Fig.3)
SIGNAL GENERATOR OR SWEEP _|RADIO DIAL SETTING
GENERATOR
CONNECTIONS FREQUENCY
Fashion a loop of |450 kHz 30% Mod. |Point of non- Z102 (AM IFT) Adjust for maximum
output.
interference (on/about
600 kHz) and radiate signal
into loop of receiver.
20