Harman Kardon HK680 - Block Diagram

/ HK680
ALIGNMENT PROCEDURES (REFER TO PAGES 8 AND 19)
i Conditions : + Set the Function selector to the "CD” position.
¢ Set the Volume contro! to minimum.
* Make the adjustment at a room temperature of 77°F (25°C)
Mi DC BALANCE ADJUSTMENT
Connect the Digital Volt Meter to Speaker output(L ch). VR481 0+10mV
Connect the Digital Volt Meter to Speaker output(R ch). VR482 0+10mV
[HE IDLING CURRENT ADJUSTMENT
Connect the Digital Volt Meter to TM403 and TM405. VR401
Connect the Digital Volt Meter to TM404 and TM406. VR402
Wi After the above adjustment, leave the unit with its power on for longer than 15 minutes and then repeat the same
adjustment.
BLOCK DIAGRAM
tT paowo | TREBLE INTEGRATED/
t
lero { BALANCE VOLUME ——-VR505/506 SEPARATE
sal ioe Ra : VR501/502 VRS503/504 — vR507/508 SW502 MAIN. AMP
Bis I SPEAKER
wuxe-P—¥] setecror z x 2 ° = ©SYSTEW 1
| @801-814 0
VIDEO
©SYSTEM
2
TUNER
;
HEADPHONES
| H HP404
co | : (e)
'
uN ©MAIN-IN
| J5
TARE 0020200 7 © PRE-OUT
IN 1
1
RECORD SELECTOR i
0 i REMOTE IN
'
fe)
Det REMOTE
CONTROL REMOTE OUT
TAPE MICRO-COMPUTER
OUT
co
I POWER
SUPPLY ented
TAPE2
i FUNCTION KEY
J