Sony HTC-D159 - Record Level Adjustment

(1) Supply a 43.6mV (-—25dB) signal (315Hz) from the
CN3802. Adjust the VOLUME control so that a
24.5mV (—80dB) signal is output to the headphones
terminal.
(2) Insert alignment tape CS-122 into deck B and put
the set into the REC mode.
(3) Adjust the signal frequency to 10kHz.
(4) Put the set into the PB mode and adjust RV151
[RV403] (L-CH) and RV251 [RV503] (R-CH) in the
REC mode so that the level difference between
315Hz and 10kHz is within 0 + 0.5dB.
(5) Repeatedly put the set into the REC and PB modes
two to four times and adjust the bias.
Adjustable limits:
The playback level of 10kHz signal relative to that
of 315Hz : 0dB + 0.5dB.
Record Level Adjustment
Setting:
APE. SELECT 3 “FY PE: 4
Procedure:
1. Mode: record
SC
pucks blank tape
Ey CS-122
4 | attenuator
oto O
1Pooo —
CN302_ Pin @ (L-CH)
[CN411] Pin ©) (R-CH)
315 Hz, 43.6 mV (— 25 dB)
2. Mode: playback
test tape
P-4-L300
(315 Hz, 0 dB) VIVM
EG @: L-CH ) a
Pin@: R-CH
Oar Aenel
\ c
CN312 [CN405]
(1) Supply a 438.6mV (—25dB) signal (815Hz) from the
CD terminal.
(2) Insert alignment tape CS-122 into deck B and record
the signal. Then playback the recorded portion of
the tape and adjust RV103 [RV402] (L-CH) and
RV203 [RV502] (R-CH) so that the 43.6mV (— 25dB)
signal output is obtained at CN3802 [CN411] terminal.
Adjustable limits:
CN312 [CN405] level: 46.2 —41.lmV (—24.5~ —25,5dB)
e Adjusting Parts Location
Except E Model:
TC MAIN BOARD (Component Side)
RV103 : Record Level Adjustment
RV203 : Record Level Adjustment
(L-CH) (R-CH)
RV202 : Playback Level Adjustment
(DECK-B, R-CH)
RV102: Playback Level Adjustment
(DECK-B, L-CH)
bt
T
=
LI
i
CNP311
N302
O CN312 ee hs
RV101: Playback Level Adjustment
(DECK-B, L-CH)
RV201 : Playback Level Adjustment
(DECK-B, R-CH)
E Model:
TC MAIN BOARD (Component Side)
RVSOO :
RV400 :
RVS01
: RV401
RV505 : Tape Speed Adjustment
(Normal)
: Record Level
U
!
RV251: Record BIAS Current
Adjustment (R-CH)
RV151: Record BIAS Current
Adjustment (L-CH)
RV371: Tape Speed Adjustment
(High)
RV372: Tape Speed Adjustment
(Normal)
Playback Level Adjustment
(DECK-A, R-CH)
Playback Level Adjustment
(DECK-A, L-CH)
: Playback Level Adjustment
(DECK-B, R-CH)
: Playback Level Adjustment
(DECK-B, L-CH)
Adjustment (L-CH) {5}
Adjustment eis
Record Level
RV504: Tape Speed Adjustment
(High)
: Record BIAS Current
Adjustment (R-CH)
: Record BIAS Current
Adjustment (L-CH)