Refer to the service manual for Model No. SA-EH590EG, SA-EH590EP (Order No. AD0302008C8)
for information on Accessories and Packaging.
2. Location of Controls
3. Operation Checks and Component Replacement /
Procedures
- This section describes procedures for checking the operation of
the major printed circuit boards and replacing the main
components.
- For reassembly after operation checks or replacement, reverse the
respective procedures. Special reassembly procedures are
described only when required.
3.1. Checking for the main P.C.B.
- Check the main P.C.B. as shown above.
3.2. Checking for the operation P.C.B.
- Follow the (Step 1) - (Step 3) of item 3.1.
2
3
- Check the operation P.C.B. as shown below.
3.3. Replacement for the motor ass’y, capstan belt and winding belt
- Follow the (Step 1) - (Step 3) of item 3.1.
4
- Follow the (Step 1) - (Step 7) of item 3.2.
567
3.4. Replacement for the components parts on the mechanism P.C.B.
- Follow the (Step 1) - (Step 3) of item 3.1.
- Follow the (Step 1) - (Step 7) of item 3.2.
- Follow the (Step 1) - (Step 4) of item 3.3.
8
3.5. Replacement for the pinch roller ass’y and head block
- Follow the (Step 1) - (Step 3) of item 3.1.
- Follow the (Step 1) - (Step 7) of item 3.2.
- Follow the (Step 1) - (Step 5) of item 3.3.
3.6. Replacement for the cassette lid ass’y
- Follow the (Step 1) - (Step 3) of item 3.1.
9
3.7. Replacement for the cassette holder
- Follow the (Step 1) - (Step 3) of item 3.1.
- Follow the (Step 1) - (Step 11) of item 3.2.
10
4. To Supply Power Source
This unit is designed to operate on power supplied from system connected. / When a component
requires service, use the system connections to supply power source. / For system connections,
refer to Fig.4-1.
Fig. 4-1.
5. Service Mode Function of Cassette Mechanism
This unit is equipped with a service mode function of cassette mechanism, so that if the unit
operates incorrectly, the fault displayed using an error code on the FL display of the Tuner/
Amplifier (SA-EH590). The system control IC and FLdisplay are part of the Tuner/Amplifier so
make sure the system has been connected properly before using this function. Use this function
during maintenance to check faults of items below.
5.1. Cassette tape to be prepared
Metal tape:
Recorded music tape with only one erasure prevention tab intact. /
(use middle portion of tape)
Normal tape: / CrO2 tape:
Recorded music tape with both erasure prevention tabs intact. /
(use middle portion of tape)
11
5.2. Selecting service mode
1. Turn on the power to the unit.
2. Make sure that no tape is inserted in the cassette deck. (Service
mode cannot be selected with a tape inserted in the cassette deck.)
3. Press the DOLBY NR button for about 2 seconds, and keep
pressing it, also press the STOP button for about 2 seconds. Refer
to Fig. 5-1.
Fig. 5-1.
5.3. Deck 1 mechanism check
1. Press the Deck 1/deck 2 select button to change the flashing Deck
2 indicator to Deck 1. Refer to Fig. 5-2. / (No change required if
Deck 1 indicator already flashing.)
2. Press the Deck 1 cassette holder open button to open the Deck 1
cassette holder. Refer to Fig. 5-2.
3. Insert a CrO2 tape into the Deck 1 and close the cassette holder.
4. Press the Fast forward button. Refer to Fig. 5-2. / (Tape fast
forwards for about 2 seconds then stops.)
5. Press the PLAY button. Refer to Fig. 5-2. / (After TPS operation
and check, the tape stops.)
6. Open the Deck 1 cassette holder and replace the tape with a
normal tape.
7. Close the Deck 1 cassette holder.
8. Press the Record pause button. Refer to Fig. 5-2. / (No record
operation.)
9. Press the STOP button. Refer to Fig. 5-2. A mechanism error code
is displayed. Refer to Table 5-1. Each time the STOP button is
12
pressed, the fault items are displayed in sequence.
mode
plunger
replace)
switch
and
S952
replace)
1
S976).
Check
plunger
mechanism
Fig. 5-2.
Table 5-1.
FL displaySymptomCause
H01Cassette deck does not operate correctly.Faulty cassette deck mechanism
switch (Deck 1: S951, Deck 2: S971),
and capstan motor. / (Check and
H02Unit does not record or the unit goes into
recording mode even when the erasure
prevention tabs have been removed from the
cassette.
H03Tape does not play even when the tape deck
play button is pressed.
The motor operates when the tape deck play
button is pressed even if cassette is loaded in
the deck.
H06Cassette deck does not detect CrO2 tape.Faulty CrO2 tape detect switch (Deck
H07Cassette deck does not detect Metal tape.Faulty Metal tape detect switch (
F01When the tape play button is pressed, tape
advances only slightly and then stops.
F02TPS (tape program search) does not work.Faulty TPS signal detection or faulty
Faulty tape detect switch (Deck 1:
S972) or short-circuit. (Check and
Deck 2: S973). / (Check and replace)
and replace)
Reel pulse error (Faulty Hall IC). (
replace)
control. / (Check and replace
control IC)
5.4. Deck 2 mechanism check
1. Press the Deck 1/deck 2 select button to change the flashing Deck
1 indicator to Deck 2. Refer to Fig. 5-3.
2. Press the Deck 2 cassette holder open button to open the Deck 2
13
cassette holder. Refer to Fig. 5-3.
3. Insert a metal tape into the Deck 2 with an intact erasure
prevention tab on the right side.
4. Close the Deck 2 cassette holder.
5. Press the Fast forward button. Refer to Fig. 5-3. / (Tape fast
forwards for about 2 seconds then stops.)
6. Open the Deck 2 cassette holder and turn over the metal tape.
(intact erasure prevention tab on the left side.)
7. Close the Deck 2 cassette holder.
8. Press the Rewind button. Refer to Fig. 5-3. / (Tape rewinds for
about 2 seconds then stops.)
9. Open the Deck 2 cassette holder and replace the metal tape with a
CrO2 tape.
10. Close the Deck 2 cassette holder.
11. Press the PLAY button. Refer to Fig. 5-3. / (After TPS operation
and check, the tape stops.)
12. Open the Deck 2 cassette holder and replace the CrO2 tape with a
normal tape.
13. Close the Deck 2 cassette holder.
14. Press the Record pause button. Refer to Fig. 5-3. / (No record
operation.)
15. Press the STOP button. Refer to Fig. 5-3. A mechanism error
code is displayed. Refer to Table 5-1. Each time the STOP button is
pressed, the fault items are displayed in sequence.
Fig. 5-3.
14
5.5. Exiting service mode
1. Press the STOP button for more than 5 seconds. (Diagnostic
contents stored in memory for both Deck 1 and 2 are erased.)
2. Remove the cassette tape from the cassette holder.
3. Turn off the unit.
6. Schematic Diagram Notes
- This schematic diagram may be modified at any time with the
development of new technology.
Notes:
S900:
Stop switch ()
S901:
Deck 2 cassette holder open switch (OPEN)
S903:
Tape edit switch (TAPE EDIT)
S904:
Record pause switch / (REC PAUSE)
S905:
Dolby noise reduction switch / (DOLBY NR)
S906:
15
Fast forward, TPS switch ()
S907:
Forward side playback switch ()
S909:
Reverse side playback switch ()
S910:
Rewind, TPS switch ()
S911:
Reverse mode switch / (REV MODE)
S912:
Deck 1/deck 2 select switch / (DECK 1/2)
S913:
Counter display switch / (COUNTER DISPLAY)
S914:
Counter reset switch / (COUNTER RESET)
S915:
Deck 1 cassette holder open switch (OPEN)
S951:
Deck 1 mode detect switch
S952:
Deck 1 half detect switch
S953:
Deck 1 CrO2 tape detect switch
S971:
Deck 2 mode detect switch
S972:
Deck 2 half detect switch
S973:
Deck 2 CrO2 tape detect switch
16
S974:
Deck 2 reverse side record prevention tab detect switch
S975:
Deck 2 forward side record prevention tab detect switch
S976:
Deck 2 METAL tape detect switch
VR101:
Deck 1 playback gain adjustment VR / (R ch)
VR102:
Deck 2 playback gain adjustment VR / (L ch)
VR103:
Deck 2 playback gain adjustment VR / (R ch)
VR104:
Deck 1 playback gain adjustment VR / (L ch)
VR801:
Deck 1 tape speed adjustment VR (normal)
VR803:
Deck 2 tape speed adjustment VR (normal)
- Indicated voltage values are the standard values for the unit
measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard. Therefore, there may exist some
errors in the voltage values, depending on theinternal impedance
of the DC circuit tester.
No mark
: Playback
( )
: Recording
- Important safety notice:
Components identified by mark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-quality sound (capacitors), low-noise (resistors),
etc. are used.
17
When replacing any of components, be sure to use only
manufacturer’s specified parts shown in the parts list.
- The supply part number is described alone in the replacement parts
list.
- Caution!
IC and LSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put a conductive mat on the work table.
Do not touch the legs of IC or LSI with the fingers directly.
- Voltage and signal line
: Positive voltage line
: Playback signal line
: Recording signal line
7. Schematic Diagram
8. Printed Circuit Board Diagram
9. Type Illustration of ICs, Transistors and Diodes
10. Wiring Connection Diagram
11. Block Diagram
12. Terminal Function of ICs
12.1. IC701 (M38503M2406F): / System Control
18
Pin
101
No.
1
Terminal
Name
V
CC
I/OFunction
IPower supply terminal
2VREFIReference voltage input
3
AV
SS
-GND terminal
4LMTOMuting control signal output
5PL1ODeck 1 solenoid control signal
output
6M1ODeck 1 motor drive control
signal output
7HALTIPower failure detect signal input
8REQISerial communication request
signal input
9CSISerial communication complete
signal input
10CLKOSerial communication clock
signal output
11DATA
OUT
OSerial communication data
signal output
12 DATA INISerial communication data
signal input
13 METAL 2IDeck 2 tape detect switch signal
(METAL) input
14
CRO2 2
I
Deck 2 tape detect switch signal
(CrO2) input
15
V
SS
-GND terminal
16 FWD LEDOLED drive control signal (FWD)
output
17 REV LEDOLED drive control signal (REV)
output
18RESETIReset signal input
19XINIOscillator connected terminal (F
20XOUTO
21
V
SS
22
CRO2 1
=8 MHz)
-GND terminal
I
Deck 1 tape detect switch signal
(CrO2) input
23MODEI
Deck 1 mechanism switch
signal (MODE) input
24HALF1I
Deck 1 mechanism switch
signal (Half) input
25TPSITPS signal input
26 A DATAOSerial data signal output for IC
101
27A CLKOSerial clock signal output for IC
101
28 A LATCHO Serial latch signal output for IC
19
101
Terminal
Pin
Name
No.
29PL2O Deck 2 solenoid control signal
30M2ODeck 2 motor drive control
31 ENC/DECODolby NR record/playback mode
32 DOLBY
ON/OFF
33E CS-
34
|
36
37 LED CNTO LED color control signal output
38
39AD SWI
40
41KEY2IOperation key signal input
42KEY1IOperation key signal input
NC
PHOTO2T
PHOTO1T
I/OFunction
output
signal output
select signal output
O Dolby NR ON/OFF control signal
output
EEPROM chip select signal
output
(Not used, open)
-
Not used, open
IDeck 2 reel pulse detect signal
input
Deck 2 mechanism switch
signal input
(Half, Mode, F REC INH., R REC
INH.)
IDeck 1 reel pulse detect signal
input
13. Measurements and Adjustments
Note:
This unit RS-DV290 is designed to operate on power supplied from
system connected.
1. Connect the measuring instrument as shown in Fig. 13-1.
2. Replace azimuth screws for both forward and reverse directions
after removing the screw-locking bond left on the head base.
(Supply part No. of azimuth screw: RHD17015 )
3. Playback the azimuth adjustment portion (8 kHz, -20 dB) of test
tape (QZZCFM). Adjust the azimuth screw until the outputs of the L/
R ch are maximized. Refer to Fig. 13-2. Make sure that
thedifference in the peak level between the left and right channels
does not exceed 0.5 dB.
4. Perform the same adjustment in reverse playback mode.
Check of the level difference forward and reverse directions.
5. Playback the playback gain adjustment portion (315 Hz, 0 dB) of
test tape (QZZCFM). Check if level difference between forward and
reverse direction is within 1.5 dB.
6. After the adjustment, apply screw lock to the azimuth screw.
Fig. 13-1.
Fig. 13-2.
21
13.4. Tape speed adjustment / (Deck 1/2)
Note:
When connecting the unit to other system components for test,
short the section between the test point TP604 and TP609 and turn
on the entire system. (The unit is set to the TEST mode, and either
Deck 1 or Deck 2 indicatorwill blink.)
Normal speed (Standard value: 3000 ± 45 Hz)
1. Connect the measuring instrument as shown in Fig. 13-3.
2. Playback the middle portion of test tape. (QZZCWAT)
3. Adjust VR801 (Deck 1) and VR803 (Deck 2) for output value shown
below. (For adjustment point, refer to Fig. 13-11. )
Adjustment target: 3000 ± 15 Hz (Normal speed)
Standard value: 3000 ± 45 Hz (Normal speed)
Fig. 13-3.
Note:
When the unit is finished for adjusting, disconnect the short section
between TP604 and TP609 .
13.5. Playback gain adjustment (Deck 1/2)
1. Connect the measuring instrument as shown in Fig. 13-4.
2. Find the start of the 315 Hz, 0 dB section of test tape (QZZCFM),
insert the tape into Deck 1 and 2, and play it back (FWD).
ch) [VR101 (R ch)] so that the output is within the standard value
shown below. (For adjustment point, refer to Fig. 13-11. )
22
[Standard value:265 mV ~ 300 mV]
Fig. 13-4.
13.6. Erase current confirmation (Deck 2)
1. Connect the measuring instrument as shown in Fig. 13-5.
2. Insert the blank tape into Deck 2, and press the Record pause
button.
3. Check if the output at this time between the erase current
confirmation point TP301 and TP302 (the output on both edged of
R313) is within the standard value shown below. (For the erase
current confirmation point, referto Fig. 13-11. )
Standard ValueEVM reading
Normal tape
:
CrO2 tape:
Metal tape:
Note:
85 ± 25 mA (85 ± 25 mV)
150 ± 25 mA(150 ± 25
mV)
185 ± 25 mA(185 ± 25
mV)
Fig. 13-5.
The test tape is not required when confirming the erase current.
13.7. Playback frequency response check (Deck 1/2)
1. Connect the measuring instrument as shown in Fig. 13-6.
2. Playback the 315 Hz, -20 dB and 12.5 kHz to 63 Hz, -20 dB sections
of test tape (QZZCFM) and then, using the 315 Hz, -20 dB playback
23
output as a reference (0 dB).
3. Confirm the playback frequency response is within the range
shown in Fig. 13-7.
Fig. 13-6.
Fig. 13-7.
13.8. Recording/playback / frequency response and gain check
(Deck 2)
13.8.1. Normal tape check
1. Connect the measuring instrument as shown in Fig. 13-8.
2. Insert a Normal type blank tape (QZZCRA4) into Deck 2.
3. Record signals at 50 Hz, 100 Hz, 200 Hz, 500 Hz, 1 kHz, 2 kHz, 10
kHz and 12.5 kHz (28 mV).
4. Set the playback frequency of recorded signals at 1 kHz as a
reference response (0 dB).
5. Playback the recorded signal to confirm that the output is within
the range of the overall frequency response shown in Fig. 13-9.
Fig. 13-8.
Fig. 13-9.
24
13.8.2. CrO2/Metal tape check
1. Connect the measuring instrument as shown in Fig. 13-8.
2. Insert a CrO2/Metal tape into Deck 2.
3. Record signals at 50 Hz, 100 Hz, 200 Hz, 500 Hz, 1 kHz, 2 kHz, 10
kHz and 12.5 kHz (28 mV).
4. Set the playback frequency of recorded signals at 1 kHz as a
reference response (0 dB).
5. Playback the recorded signal to confirm that the output is within
the range of the overall frequency response shown in Fig. 13-10.
Fig. 13-10.
13.9. Adjustment point and test point
25
Fig. 13-11.
14. Checking Procedure for Self-operation of
Cassette Mechanism Ass’y
- This procedure describes simple methods independent of
mechanism controller or governor circuit.
14.1. Operation Check Providing with Cassette Tape
1. Push up the EJECT lever with rubber band. (Refer to Fig. 14-2. )
2. Apply DC 5V to the MOTOR. (MOTOR will be rotated) (Refer to Fig.
14-1. )
3. Provide the cassette tape with mechanism ass’y.
4. Apply DC 9V to the plunger, and then operate it by switching
power ON/OFF. (Power: +PL, -PL) (Refer to Fig. 14-1. )
A. FWD PLAY: Supply power to the plunger momentary. (Duration:
approx. 50msec.)
B. FWD FF: At FWD PLAY mode, supply power to the plunger
momentary. (Duration: approx. 50msec.)
C. STOP: At FWD FF mode, supply power to the plunger
momentary. (Duration: approx. 50msec.)
D. REV PLAY: At STOP mode, supply power to the plunger for
ordinary duration. (Duration: approx. 200msec.)
E. REV REW: At REV PLAY mode, supply power to the plunger
momentary. (Duration: approx. 50msec.)
F. STOP: At REV REW mode, supply power to the plunger
momentary. (Duration: approx. 50msec.)
26
Repeat the above operation to FWD PLAY mode.
Note: Incorrect duration for power supply may be operated to other mode.
14.1.1. Connection Diagram Between the Mechanism Ass’y and Power Supply /
(MOTOR and Plunger)
Fig. 14-1.
14.1.2. Detail View of EJECT Lever / (EJECT lever fixed by rubber band, Plunger
rib operation)
Fig. 14-2.
14.2. Operation Check Not Provided with Cassette Tape
1. Push up the EJECT lever with rubber band. (Refer to Fig. 14-2. )
2. Apply DC 5V to the MOTOR. (MOTOR will be rotated)
3. Lift up the plunger rib of mechanism ass’y with the tip of minus
screwdriver, and then operate it same as power supply duration.
(Refer toFig. 14-3. )
Note: Operation order is same as the “Operation Check Providing with
Cassette Tape” item 4. above.
Fig. 14-3.
27
15. Replacement Parts List
Notes:
- Important safety notice:
Components identified by mark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-quality sound (capacitors), low-noise (resistors),
etc. are used.
When replacing any of components, be sure to use only
manufacture’s specified parts shown in the parts list.
- The marking [RTL] indicates the retention time is limited for this
Item. After the discontinuation of this assembly in production, it
will no longer available.
- All parts are supplied by SPC.
28
Ref. No.Part No.Part Name & DescriptionPcsRemarks
1RKM0392-S1CABINET1
2RHD30007-1SSCREW4
3XTBS3+10JFZ1SCREW2
4RGR0287A-PREAR PANEL1
5RKA0105-KRUBBER4
6RKA0106-NFOOT RING4
7RMN0539CABLE HOLDER1
8RDG0129-1DAMPER GEAR2
9REX0966-1WIRE ASS'Y1
10RGB0025-ATECHNICS BADGE1
11RGK1131-2SORNAMENT(L)1
12RGK1132-2SORNAMENT(R)1
13RGL0441-QPANEL LIGHT1
14REZ1194WIRE ASS'Y1
15RKF0462-K2CASSETTE HOLDER(L)1
16RKF0463-K2CASSETTE HOLDER(R)1
17RKF0587G-2SCASSETTE LID(L)1
18RKF0588-2SCASSETTE LID(R)1
19RKW0577-QCASSETTE WINDOW(L)1
20RKW0578-QCASSETTE WINDOW(R)1
21RMB0474SPRING2
22RMQ0577A-3FRAME1
23RUS757ZASPRING4
24RYP1179-SFRONT PANEL1
25XTBS26+10JSCREW7
26XTB3+10JFZSCREW5
27XTBS3+8JFZ1SCREW3
28RMG0161RUBBER1
29
Ref. No.Part No.Part Name & DescriptionPcsRemarks
29RMR0909-XPCB HOLDER1
101RED0037HEAD BLOCK ASS'Y / (R/P)1 L1AA00000008
101-1RHD17015SCREW2
102RED0038HEAD BLOCK ASS'Y / (P.B)1
102-1RHD17015SCREW2
103RDG0300REEL TABLE BASE4
104RDG0301GEAR2
105RDK0026GEAR2
107RDV0033-4BELT12
108RDV0034-1BELT22
110RUW147ZASPRING2
111RMB0400SPRING4
112RMB0403SPRING2
113RMB0404SPRING2
114RMB0406SPRING2
115RMB0408SPRING2
116RML0370-JLEVER2
117RML0371LEVER2
118RML0372LEVER2
119RML0374LEVER2
120RMM0131ROD2
121RMM0133-1ROD2
122RMQ0519REEL CAP4
123RMS0398-1SHAFT2
124RSJ0003PLUNGER ASS'Y2
125RUS609ZCSPRING2
126RXF0049FLY WHEEL ASS'Y2
127RXF0050FLY WHEEL ASS'Y2
128RXG0040GEAR4
129RMK0283A-JSUB CHASSIS2
130RXL0124PINCH ROLLER ASS'Y2
130-1RMB0401SPRING2
131RXL0125PINCH ROLLER ASS'Y2
131-1RMB0402SPRING2
132RXL0126ARM GEAR2
133RXQ0412CHASSIS ASS'Y2
133-1RMB0405SPRING2
133-2RMM0132-JFR ROD2
134REM0055-1MOTOR ASS'Y2
135RHD26022SCREW4
136XTW2+5LSCREW4
137XTW26+10SSCREW6
138XYC2+JF17SCREW2
140RFKJSCH770EKMAIN CHASSIS ASS'Y1
C101-04ECUV1H681KBN50V 680P4 F1J1H681A021
C109,10ECQB1H183JF350V 0.018U2
C111,12ECEA0JKS4706.3V 47U2
C113,14ECEA1HKS2R250V 2.2U2
C115,16ECJ2VB1H471K50V 470P2
C117,18ECUX1H331KBX50V 330P2
C119,20ECA1HAK010XI50V 1U2
C123,24ECEA1EKS4R725V 4.7U2
C125,26ECJ2VB1H332K50V 3300P2
30
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