Panasonic sa ch 74 service manual

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Extracted text from panasonic sa ch 74 service manual (Ocr-read)

Page 1

ORDER NO. MD9606037C3

ervice Manual

COMPACT *1
MAS H *2_[I DOLBY B NR CD Stereo System
main stage noiusthing
oIoIrAL AunIo SA- C H 74
I Colour
(K) Black Type
Area
Suffix for
Model No. Area Colour
(GC) Asia,LatinAmerica,Africa
and Middle Near East
(GCS) Singapore (K)
, , , _ (GN) Oceania
Riggnfiagm' ammo SA-CH74 _ SB-CH430 (GT) Taiwan
TAPE SECTION : AR2 MECHANISM SERIES 6) °9K°9

CD SECTION : RAE01502 TRAVERSE DECK SERIES

I Specifications

I Amplifier Section
1 kHz continuous power output

Both channels driven 2 x 35W (THD 1%, 4S!)
RMS 2x50W(THD10°/o,49)
PMPO 800W (49)

Total harmonic distortion

Halt power at 1 kHz 0.06 % (4 0)
Frequency response
CD,AUX 60 Hz - 20 kHz (-3 dB)
Input sensitivity and impedance
AUX 250 mV, 28 k0
MIC 0.6 mV, 680 (2
Tone controls
6 E0 SPACE HEAW, CLEAR, SOFT, DISOO, LIVE, HALL
V. BASS (volume at -30 dB) 63 Hz, 7 dB
Load impedance 4 Q
I CD Section
Samplingtrequency 44.1 kHz
Decoding 16 bit linear
Beam source/wave length Semiconductor Iaser/ 780 nm
Number of channels Stereo
Frequency response 20 Hz - 20 kHz (+1 dB, -2 dB)
S/N(CD UNIT OUT) 95 dB (JIS. A)
Wow and ﬂutter Below measurable limit
Digital filter 8 Is
D/A converter MASH (1 bit DAC)
System Music Center Speaker
SC-CH74 (GO) SA-CH74 (GC)
SC-CH74 (GCS) SA-CH74 (GCS)
SC-CH74 (GT) SA-CH74 (GT) SB-CH430 (GC)
SC-CH74 (G N) SA-CH74 (GN)
SC»CH74 (GH) SA-CH74 (GH)

Panasonici

*1 MASH is a trademark of N'I'I'.

I Cassette Deck Section

Tracksystem 4 track, 2 channel
Heads

Playback Solid permalloy head (Rotary head)

Record/playback Solid pennalloy head (Rotary head)

Erasure Double gap ferrite head
Motor DC servo motor
Recording system AC bias 100 kHz
Erasing system AC erase 100 kHz
Tape speed 4.8 cm/s (1% ips)
Frequency response [(+3 dB, -6 dB) at deck out]

NORMAL 35 Hz- 14 kHz

CrO2 35 Hz- 14 kHz
SIN (CrOZTYPE)

Dolby NR off 50 dB (A weighted)

Dolby NR on 60 dB (CClFl)
Wow and flutter 0.18 % (WRMS)

Fast forward and rewind time
Approx. 120 seconds with C-60 cassette tape

I FM Tuner Section

Frequency range 87.50 - 108.00 MHz
Sensitivity 23.3 dBf
Total harmonic distortion

MONO 0.3 %

STEREO 0.5 %
SIN (MONO) 60 dB
Image reiection at 98 MHz 35 dB
Stereo separation at 1 kHz 35 dB

Antenna terminal(s) 750 (unbalanced)

*2 Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.

Dolby" and the double-D symbol are trade marks of Dolby
Laboratories Licensing Corporation.