The purchased manual is an scan of the original Panasonic paper-based Service Manual. Unfortunately the contrast is not perfect, but I am satisfied anyway!
The purchased manual is an high-quality scan of the original JVC paper-based Service Manual. The Service Manual includes the Owner´s Manual, so you do not have to buy both of them.
Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
Text excerpt from page 57 (click to view)
CFD-646/656/C646
US Model Canadian Model
SERVICE MANUAL
Ver 1.0 1998. 05
E Model Australian Model
CFD-646/656 CFD-C646
SUPPLEMENT-1
File this supplement with the service manual.
Subject: Addition of Mexican Model
Addition of Mexican Model
Mexican Model has been added. They are the same as E model which is not described in this supplement-1. Refer to CFD-C646 original service manual (9-923-055-�) for other information.
DIFFERENCE TABLE
Page
Ref. No. Part No.
E model
Description Remark Ref. No. * 451 * 451 Part No. * 451 * 451 A-3304-811-A SPEAKER (SUB) (R) ASSY A-3304-812-A SPEAKER (SUB) (L) ASSY
� Items marked �*� are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.
Sony Corporation
9-923-055-81
Personal A&V Products Company