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No. : VSB-85030
Date : 08/06/1998
From the shipment
EFFECTIVE DATE 31/05/1998 EFFECTIVE FROM(SERIAL NO.)
on June 1998
Subject Improvement of the reliability
Before Change After Change K-
No. LOC NO. Note Remark
PART NO. DESC./SPEC. PART NO. DESC./SPEC. CODE
1 4814V00016A BUTTOM
4814V00016B MAIN 1 SBHG-1 . BOTTOM
Reason Of Change
Symptom : "HUM" in sound when playing a tape recorded in SET.
Countermeasure : Add a silicon shield plate to SHIELD BOTTOM.
** FILE THIS SERVICE BULLETIN WITH YOUR SERVICE MANUAL
NOTE(**) : INTERCHANGEABILITY CODE KEY-WORD CODE
Original or new parts may be used in early or
Original Early late production sets. 1. To improve performance
New Late Use original parts until exhausted, then stock 2. To improve productivity
Original parts may be used in early production
sets only. 3. To improve reliability
New parts may be used in early or late production
New Late 4. Change of material or
Use original parts where possible, then stock new dimension
New parts only may be used in early or late 5. Addtion
Stock new parts. 6. Deletion
Original parts only may be used in early
Original Early production sets. 7. Correction
D New parts may be used in late production sets
New Late only.
Stock original and new parts.
CHIEF ENGINEER ,
NO POWER : NO STAND-BY
Check if the NO
Replace the Fuse
Fuse is O.K.?
Is there voltage at NO Check/Replace
pin 9 of T801? D801, D802, 803, 804, R801, C807.
Is there about 6.1V
D806, Q801, R807, ZD801, C814,
at pin 9 of IC801?
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