1 PAIR = 2PCS Replacement Transistor MARANTZ 2SD188 2SA627

1 PAIR = 2PCS Replacement Transistor MARANTZ 2SD188 2SA627

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1 Matched PAIR = 2PCS Replacement Substitute Transistor MARANTZ 2SD188 2SA627 

As used in 2215B 2215BL etc 
Note; it sometimes happens that after replacement of only one pair, the volume may vary so that one channel has a higher volume than the other, in that case also replace the other pair.
Note picture is from different model but looks the same

zie ook https://www.euromaxx.nu/Hitte-geleidingspasta-koelpasta-spuit-tube-1g

First we have a look at the original mounted subs;

2SA627

Silicon PNP Transistor

 23a0-TO-3
 
Uce/Ucb:-80/-100V
Ic:-5A
β (Ic/Ib):
N:60W
F:15MHz
Tmax:
the 2SA627 is a silicon PNP transistor, Uce = 80V, Ic = 5A, applications: audio frequency stage, power transistor, switch

2SD188

Silicon NPN Transistor

complementary to 2SA627

 23a
 
Ucb:100V
Ic:7A
β (Ic/Ib):
N:60W
F:10MHz
Tmax:
the 2SD188 is a a transistor for use in audio frequency stages as well as power switch transistor

Shipped will be the substitute 2SA627 = PNP = MJ21193G & 2SD188 = NPN = MJ21194G
As previous posts on AK and our service department confirm that these subs are a fine and recently produced replacement.
The original offered 2SA627-2SD188 often prove to be cheap chinese immitation since production has stopped over 20 years ago

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