Pioneer CT-1060W Service Manual page 27

CT-1IO6OW, CT-S77W
Deck II
1. Head Azimuth Adjustment
@ Turn V102 and V202 to mechanical center positions.
Mode Input signal & test tape Adjustment location Adjustment value Remarks
STOP Set the TAPE SELECTOR switch to the NORM position.
PLAY
Play the 10kHz/—20dB section Head azimuth adjust- {Left and right OUT- |Maximum playback
of the STD-331B test tape. ment screw. PUT terminals. signal level.
(See Fig. 10-5)
n"
TOP Lock the screw with screw lock after completing the adjustment.
2. Playback Equalizer Check
lode Input signal & test tape Adjustment location Adjustment value
TOP Set the TAPE SELECTOR switch to the NORM position.
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By > <
Play the 315Hz/~20dB and Confirm
6.3kHz/-20dB section of
Left and right OUT-
PUT terminals.
The 6.3kH2z playback
level is 0+2dB
against 315Hz level.
the STD-331B test tape.
3. Playback Time Constant Switching Check
e Put the deck into playback mode with no cassette loaded.
@ Check that the noise level changes at the line playback output terminals when the TAPE SELECTOR switch is changed.
4. Playback Level Adjustment
@ This adjustment determines the DOLBY NR level, and must be performed with great care.
Mode Input signal & test tape Adjustment location Measuring location Adjustment value Remarks
STOP Set the TAPE SELECTOR switch to the NORM position.
PLAY | Paly the 315Hz/OdB section of | V102 (Left channel) TP1 (L ch) -7.7dBv (412.1mV)
the STD-331B test tape. V202 (Right channel) TP2 (R ch)
. Level Meter Check
REC- Apply a 315Hz/-10dBv REC LEVEL control TP1 (L ch) Check that the level meters '"'OdB"' light up
PAUSE (316mV) signal to the LINE TP2 (R ch) within -7.7dBv+2dB of the signal ou tput
INPUT terminals. level.
6. Recording and Playback Frequency Response Adjustment
Mode Input signal & test tape Adjustment location Adjustment value
STOP Set the TAPE SELECTOR switch to the NORM position. aa
REC. Apply a 315H/-30dBv REC LEVEL control TP1 (L ch) -27,7dB (41.2mV)
PAUSE | (31.6mV) signal to the LINE TP2 (R ch)
INPUT terminals.
3] REC/ Record the above signal level V104 (Left channel) |Left and right OUT- | The 6.3kHz playback level is +0.5 ve dB
PLAY | onto the STD-6GO8A test tape V204 (Right channel) |PUT terminals. against 315Hz level (Playback the sig mals
at 315Hz and 6.3kHz, and on the STD-608A)
playback.
Change the test tape, tape selector and DOLBY NR switch positions, and check that the frequency response is satisfact ory
(See Fig. 10-8). If the response does not lie within the specified range, readjust V104 and V204 that the 6.3kHz playmek level
is -2 ~ +3.5dB against 315Hz level in the step 3.
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