Harman kardon hk 1000 service manual

Page 1

Wow

The Harman-Kardon
Model HK 1000

Professional Stereo Tape
Cassette Deck

with Dolby Noise Reduction

System

(2)

Technical Manual

harman / kardon

Page 2

ELECTRICAL ADJUSTMENTS

Unless otherwise indicated, all electrical adjustments should be made under the following conditions:

A. Power switch in the ON position.
B. Stereo/mono switch in the STEREO position.
C. Dolby NR switch in the OFF position.
D. Tape switch in the LN position.
Also, make all adjustments in the sequence shown here.
SIGNAL MEASUREMENT
ITEM SOURCE CONNECTION MODE ADJUST INSTRUCTIONS
400 Hz Internal VTVM to Record VR401 1. Set PLAYBACK LEVEL on
Oscillator 400 Hz OUTPUT Jacks Pause on P.C.B. front panel at maximum position.
Level Oscillator Dolby Test 2. Depress TEST button on front
Tone panel.
3. Adjust for 580mV.
Meter Internal VTVM to Record VR203 1. Depress TEST button on front
Level 400 Hz OUTPUT Jacks Pause VR303 panel.
Oscillator on P.C.B. 2. Be sure VTVM reads SSOmV at
Dolby. each output (PLAYBACK
LEVEL maximum position).
3. Adjust to obtain OVU on VU
meters.
DOLBY 400 Hz VTVM to Playback VHS 1. Set PLAYBACK LEVEL on
Input Level 20 mM/mm OUTPUT Jacks VR105 front panel to maximum
or ZOOnW/IVI Plav CAL positions
Test Tape on front 2. Adjust for 580mV.
panel 3. Be sure VU meters each read
OVU.
Playback PHILIPS VTVM or Playback VR 3 I L 1. Adjust for $1.5 do in reference
Amplifier TCFR Response VR103) to 0 db @ 1 KHZ.
Equalization Test Tape Tracer to VR4 I M Note: Effective frequency range
OUTPUT VR104) L - Less than 80 Hz
JACKS VR2 I H M -- More than 3 KHZ
VR102) H - More than 8 KHz
on P.C.B.
Deck Amp
Bias 105 KHz to 027 Record T2 Adjust for a circle pattern on
Frequency Horizontal to Vertical Pause on P.C.B. oscilloscope.
Input of Input of Rec. Amp
Oscilloscope Oscilloscope
Bias Internal VTVM from Record L2 Adjust for minimum readings.
Trap Bias K4 81 K104 Pause L3
Oscillator colloitors to L102
ground L103
on P.C.B.
Rec. Amp
Record Internal VTVM to Record 1. Depress TEST button on front
Playback 400 Hz OUTPUT panel.
Level Oscillator Jacks 2. Be sure VU meters each read
OVU.
3. Record the signal on "TDK
CGOSD" or on a tape of the
brand most often used.
Playback 4. Play back the recorded signal
and note the VTVM readings.
VRB 5. Repeat steps 3 & 4 and adjust
VR108 to obtain 580mV reading during
Rec. CAL. Playback.
on front
panel

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