Technics RSDV-250 Service manual
Service Manual
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AD0102028C2
Cassette Deck
l RS-DV250
AR-2 Mechanism series
Colour
(S)..........Silver Type
Area
(E)..........Europe.
© 2001 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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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 (SAEH770). 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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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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5.2 Selecting service mode
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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.
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5.3 Deck 1 mechanism check
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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 pressed, the fault items are displayed in sequence.
Fig. 5-2.
Table 5-1.
FL
display
H01 Cassette deck does not operate correctly. Faulty cassette deck mechanism mode detect switch (Deck 1: S951,
H02 Unit does not record or the unit goes into recording mode even when the
erasure prevention tabs have been removed from the cassette.
H03 Tape 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.
H06 Cassette deck does not detect CrO2 tape. Faulty CrO2 tape detect switch (Deck 1: S953, Deck 2: S973)./(Check
H07 Cassette deck does not detect Metal tape. Faulty Metal tape detect switch (S976). (Check and replace)
F01 When the tape play button is pressed, tape advances only slightly and
then stops.
F02 TPS (tape program search) does not work. Faulty TPS signal detection or faulty plunger control. /(Check and
Symptom Cause
Deck 2: S971), plunger and capstan motor. /(Check and replace)
Faulty erasure prevention tabs detect switch (S974, S975) or shortcircuit. (Check and replace)
Faulty tape detect switch (Deck 1: S952 Deck 2: S972) or short-circuit.
(Check and replace)
and replace)
Reel pulse error (Faulty Hall IC). (Check and replace)
replace mechanism control IC)
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