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Extracted text from Technics RSDV 250 Service Manual (Ocr-read)
Page 1
http://servis-manual.com/5 Service Mode Function of Cassette
Mechanism
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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-
EH770). 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
5.2 Selecting service mode
5.3 Deck 1 mechanism check
5.4 Deck 2 mechanism check
5.5 Exiting service mode
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20. 10. 2004
file://C:\Documents%20and%20Settings\Admin\Plocha\SCHÉMATA\VIDEA\PAN...
Page 2
http://servis-manual.com/5.1 Cassette tape to be prepared
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l Metal tape:
Recorded music tape with only one erasure prevention tab intact./(use middle portion of tape)
l Normal tape: /CrO2 tape:
Recorded music tape with both erasure prevention tabs intact./(use middle portion of tape)
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Page 13
MAIN CIRCUIT A
MECHANISM CIRCUIT (DECK1) B
MECHANISM CIRCUIT (DECK2) C
CP901
CS951
CP902 CS971
Q806
DTA143EUT106
MOTOR DRIVE CONT.
Q804
2SD592ARSTA
MOTOR DRIVE CP3051
2
3
4
Z971
1 2 3 4 5 6 7
4.7K
50K
25K
4.7K
4.7K
4.7K50K
50K
50K
50K
25K 25K
A B D
C IC971
0N2180RLC1
PHOTO
INTERRUPTER
C AB
Q803
2SD592ARSTA
MOTOR DRIVE
Q805
DTA143EUT106
MOTOR DRIVE CONT.
CP3061
2
3
4
123456789
123456789
Q807
2SB621ARSTA
SOLENOID DRIVE
Q809
DTC143EUT106
SOLENOID DRIVE
Q810
DTC143EUT106
SOLENOID DRIVE
Q808
2SB621ARSTA
SOLENOID DRIVE
DL E K
CAPSTAN
MOTOR
(DECK1)
A
B M
CAPSTAN
MOTOR
(DECK2)
A
B M
123456789
123456789
R806
10K R802
560 R823
560 R824
560 R812
560 R811
10K
R814
470
R818
2.2
R805
3.9K R803
10K
R810
10K R808
3.9K
VR803
5K(B)
VR801
5K(B)
R820
2.2
R813
470
B AC
R952
820D951
MA165TA
SOLENOID
S951
(MODE) S953
(CrO2)
S952
(HALF)
S973
(CrO2)
S976
(METAL) S972
(HALF) S971
(MODE) S974
(R.REC.INH.) S975
(F.REC.INH.)
R972
820D971
MA165TA
SOLENOID
D
IC951
0N2180RLC1
PHOTO
INTERRUPTER
R953
39K
1 2
3 4
A GHB
QS PF
R973
39K
1 2
3 4
:POSITIVE VOLTAGE LINE
5V
10.3V
5V
10.3V
5V
10.3V
5V
5V
10.3V
0V 10.3V
0V
0V 10.2V
0V10.2V
0V10.3V
0V 10.3V
0V
0V 9.8V
5V
0V 5V
TAPE SPEED
ADJ.(DECK1)
0V
5V 5V
0V 0V0.8V
TAPE SPEED
ADJ.(DECK2)
